JPH10205421A - Remote starting device and engine speed detecting device for internal combustion engine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute reliable fail safe operation of an internal combustion engine during remote starting operation. SOLUTION: When remote starting operation is indicated from a transmitter 34, a starter control circuit 31 starts an internal combustion engine control circuit 64 for a vehicle by a starter motor 26 and an internal combustion engine circuit 64 and the idling state of an internal combustion engine 3 after starting is maintained. During starting operation and during operation to maintain the idling state of the internal combustion engine 3, the circuit 31 causes sensors 51-62 to measure the operation state of the internal combustion engine 3 and the peripheral part thereof and the state of a present vehicle. From the measuring results thereof, the presence of abnormality of a number of decision items, containing surplus consumption of fuel, abnormal operation of the internal combustion engine 3 and the peripheral part thereof, maintenance of the idling state of a vehicle, the stop of a vehicle, and the presence of the possibility of theft of a vehicle is decided. When abnormality of at least of one of the decision items is decided, the internal combustion engine 3 is automatically stopped. This constitution executes reliable fail safe operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote starting device for an internal combustion engine for a vehicle, which starts the internal combustion engine by remote control from the outside of a vehicle equipped with the internal combustion engine, and a rotational speed for detecting the rotational speed of the internal combustion engine. It relates to a detection device.

[0002]

2. Description of the Related Art For example, an internal combustion engine mounted on a vehicle such as a passenger car is subjected to a so-called warm-up operation before a load operation such as a vehicle operation is performed. In warm-up operation,
The internal combustion engine is started with the vehicle stopped, and after the start, the internal combustion engine is kept idle. This warm-up operation is performed not only to sufficiently warm up the internal combustion engine before the load operation, but also to operate an air conditioner that operates accompanying the driving of the internal combustion engine such as a cooler and a heater before the vehicle starts running. It is also implemented to operate and air-condition the cabin. For such a warm-up operation, a starter for an internal combustion engine using a timer has been proposed that automatically starts the internal combustion engine at a predetermined time. Further, a remote starting device for an internal combustion engine, which is called a so-called remote control engine starter, has been proposed.

[0003] When the internal combustion engine is started by these starting devices to perform the warm-up operation, there is often no person in the vehicle interior. Therefore, when the internal combustion engine enters an abnormal operation state during the warm-up operation, or when the vehicle starts running despite the warm-up operation, the starting device needs to promptly stop the internal combustion engine by a so-called fail-safe operation. There is.

[0004] As one of the prior arts of the above-described starting device for an internal combustion engine, there is one disclosed in Japanese Patent Application Laid-Open No. 62-258167. The engine starter of this publication automatically starts the internal combustion engine at a specified time set in a timer. In order to prevent running out, the starting of the internal combustion engine is prohibited. This engine starting device only detects the remaining fuel amount, and does not detect the abnormal operation state of the internal combustion engine during the warm-up operation.

[0005] As another prior art of a starting device for an internal combustion engine, there is one disclosed in Japanese Patent Application Laid-Open No. 1-119430. In the vehicle automatic start canceling device of the present publication, the internal combustion engine is automatically started at the start time set in the timer, but the operation of the internal combustion engine is stopped when the wheels start running during the start operation. In this device, the internal combustion engine is stopped when the vehicle starts running, but it is difficult to stop the internal combustion engine before the vehicle starts running.

Further, as another prior art of a starting device for an internal combustion engine, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 4-278864. In the vehicle remote control system of this publication, the start of the internal combustion engine is commanded from outside the vehicle by wireless communication, but one condition such as unlocking of the door and hood of the vehicle and release of the brake is detected during the start operation. Then, it is determined that there is a possibility that the vehicle may run away and the vehicle may be stolen, and the internal combustion engine is stopped.

In the above three prior arts, the presence or absence of the occurrence of an abnormal operation state of the internal combustion engine body is not directly detected.
Therefore, even if the internal combustion engine operates abnormally during the warm-up operation, it is difficult to stop the internal combustion engine. It is also difficult to stop the internal combustion engine by predicting the possibility of abnormal operation in advance.

Further, as a conventional technique for detecting an abnormal operation of an internal combustion engine, there is one disclosed in Japanese Patent Application Laid-Open No. 6-147069. In the remote starting device for an automobile engine according to this publication, the start of the internal combustion engine is instructed from outside the vehicle by wireless communication.
If the rotational speed in the idle state is out of the range from the lower limit to the upper limit, the internal combustion engine is determined to have abnormally operated, and the internal combustion engine is stopped. In this device, the presence / absence of abnormal operation of the internal combustion engine is determined only by the rotation speed of the internal combustion engine, and therefore, there are few determination items for abnormal operation of the internal combustion engine. If the number of judgment items is small, it becomes difficult to detect an abnormal operation of the internal combustion engine under a condition unrelated to the fluctuation of the rotational speed, and the fail-safe function does not work sufficiently.

In addition, the above-mentioned rotational speed is detected by detecting noise generated at the minus terminal of the igniter due to the ignition operation of the ignition plug of the internal combustion engine, and estimating from the generation timing of the noise to detect the rotational speed. ing. Further, the drive signal supply device disclosed in Japanese Utility Model Laid-Open Publication No. 56-338 detects the rotational speed by estimating a pulse signal generated when an automobile engine is ignited. In such a method of estimating the rotational speed, the rotational speed is estimated using noise generated accompanying the driving of the internal combustion engine as a reference signal, so that a reading error of the reference signal tends to increase. As a result, an error easily occurs in the estimated rotation speed. Further, a sensor for detecting noise of the internal combustion engine needs to be installed by extending a conductor from the installation position of the electronic component to the inside of the space where the internal combustion engine is installed in the vehicle, and the mounting structure becomes complicated. .
Therefore, it becomes difficult to additionally attach the above-described remote starting device for an internal combustion engine to an existing vehicle at a location such as a vehicle dealer.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide an internal combustion engine capable of automatically stopping the internal combustion engine by detecting in advance the inconvenience of operation of the internal combustion engine during a warm-up operation started by remote control. To provide a remote starting device. Another object of the present invention is to provide a rotation speed detecting device that is easy to mount.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a start means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, and a maintenance means for maintaining an idle state of the internal combustion engine started by the start means. Remote operating means for instructing starting of the internal combustion engine from outside the vehicle in order to operate the starting means and the maintaining means; and at least a fuel remaining amount in the fuel tank of the internal combustion engine in response to the instruction from the remote operating means. And a control unit that generates a stop signal that stops at least one of the starting unit and the maintaining unit when the remaining fuel amount measured by the remaining fuel amount measuring unit is less than a predetermined amount. Stopping means for stopping at least one of the starting means and the maintaining means in response to a stop signal from the control means. It is a dynamic system. According to the present invention, in a vehicle including a remote start device for an internal combustion engine for a vehicle, the start of the internal combustion engine for a so-called warm-up operation can be performed by remotely instructing from outside the vehicle. In this remote start operation, the driver outside the vehicle body gives an instruction to start the internal combustion engine via the remote instruction means. When given instructions,
The starting means and the maintaining means are started, and first, the starting means and the maintaining means perform a starting operation for starting the internal combustion engine. After completion of the starting operation, the maintaining means performs a maintaining operation for maintaining the idle state of the internal combustion engine. The control unit performs a so-called fail-safe operation from when the start of the internal combustion engine is instructed until the start operation is started, and during the start operation and the maintenance operation. In this fail-safe operation, first, after the instruction, the fuel remaining amount is measured by the fuel remaining amount measuring means, and then it is determined whether the fuel remaining amount for operating the internal combustion engine is less than a predetermined threshold amount. Let it. When it is determined that the remaining fuel amount is less than the predetermined threshold amount, the stopping means stops at least one operation of the starting means and the maintaining means. This internal combustion engine cannot be started when the starting means is stopped, and stops when the maintenance means is stopped, because the rotation cannot be continued. Therefore, when at least one of the starting unit and the maintaining unit is stopped, the above-described starting operation and / or the maintaining operation is stopped. Since the internal combustion engine consumes fuel if the above-described start operation and maintenance operation are performed, if the maintenance operation is continued for a long time regardless of the remaining amount of fuel, the driver tries to drive the vehicle after the warm-up operation is completed. In some cases, the remaining amount of fuel becomes very small and the vehicle cannot travel. The above-mentioned control means,
The operation of the internal combustion engine is stopped before the remaining fuel amount becomes very small. Therefore, it is possible to prevent the occurrence of a fuel shortage due to the execution of the above-described start operation and maintenance operation, thereby preventing the subsequent traveling from being impossible.

Further, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and a physical quantity fluctuating at least corresponding to an operation state of the internal combustion engine is measured in response to an instruction from the remote instruction means. The control unit generates a stop signal for stopping at least one of the starting unit and the maintenance unit when the measurement unit is out of order, in response to the stop signal from the control unit. And a stopping means for stopping at least one of the starting means and the maintaining means. According to the invention, the maintenance means of the remote starter of the internal combustion engine for a vehicle is a so-called electronic control unit (ECU), and the controllable parameters relating to the operation of the internal combustion engine during the start operation and the maintenance operation described above. To adjust. This parameter is determined such that an actual operating state is estimated from a physical quantity that fluctuates according to the current operating state of the internal combustion engine, and the estimated operating state approaches an ideal operating state. If the measurement means for measuring these physical quantities breaks down and the physical quantities become unknown, the parameters cannot be determined accurately, and the maintenance means may operate abnormally and the idle state may not be maintained. The above-mentioned control means, as the above-mentioned fail-safe operation, when the measurement means for measuring the above-mentioned physical quantity breaks down,
The stopping means stops the operation of at least one of the starting means and the maintaining means. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore,
When there is a possibility that the maintenance means may operate abnormally, the internal combustion engine can be automatically stopped.

The present invention also provides a starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and exhaust gas for measuring at least the exhaust gas temperature of exhaust gas discharged from the internal combustion engine in response to the instruction from the remote instruction means Temperature measurement means, control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the exhaust gas temperature measured by the exhaust temperature measurement means is equal to or higher than a predetermined temperature, and a stop signal from the control means. Stopping means for stopping at least one of the starting means and the maintaining means in response to the It is a starting device. According to the present invention,
When the exhaust gas temperature measured by the exhaust gas temperature measuring device rises above a predetermined threshold temperature as the fail-safe operation, the control device of the remote starting device controls the starting device and the maintaining device of the internal combustion engine by the stopping device. At least one operation is stopped. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, during the warm-up operation, it is possible to automatically prevent a problem caused by exhaust gas having an exhaust temperature equal to or higher than the threshold temperature being exhausted.

Further, the present invention provides a starting means for starting an internal combustion engine which is installed inside a vehicle and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and Remote operating means for instructing starting of the internal combustion engine from outside the vehicle to operate the maintaining means, and a hydraulic pressure for measuring at least the oil pressure of the lubricating oil in the lubricating device of the internal combustion engine in response to the instruction from the remote operating means. Measuring means, controlling means for generating a stop signal for stopping at least one of the starting means and maintaining means when the oil pressure measured by the oil pressure measuring means is less than a predetermined pressure, and responding to a stop signal from the controlling means. And a stop means for stopping at least one of the start means and the maintenance means. According to the present invention, when the oil pressure measured by the oil pressure measurement unit falls below a predetermined threshold pressure, the control unit of the remote start device described above starts using the stop unit as the fail-safe operation. Deactivating at least one of the means and the maintaining means. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, it is possible to automatically prevent an abnormal operation of the internal combustion engine due to a shortage of the oil pressure of the lubricating oil during the warm-up operation in advance.

Also, the present invention provides a starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, remote instruction means for instructing start of the internal combustion engine from outside the vehicle, and cooling for measuring at least the temperature of the cooling water in the cooling device of the internal combustion engine in response to the instruction from the remote instruction means Water temperature measurement means, control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the water temperature measured by the cooling water temperature measurement means is equal to or higher than a predetermined temperature, and a stop from the control means Stopping means for stopping at least one of the starting means and the maintaining means in response to a signal. It is the location. According to the present invention, when the water temperature measured by the cooling water temperature measuring means rises above a predetermined threshold temperature, the controlling means of the remote starting device described above performs the starting means by the stopping means when the water temperature measured by the cooling water temperature measuring means rises above a predetermined threshold temperature. And stopping at least one operation of the maintaining means. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, during warm-up operation,
An abnormal operation of the internal combustion engine caused by insufficient cooling of the internal combustion engine can be automatically prevented in advance.

Further, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, remote instruction means for instructing start of the internal combustion engine from outside the vehicle, and a throttle valve for adjusting at least an intake amount of air taken into the internal combustion engine in response to an instruction from the remote instruction means Valve opening measurement means for measuring the valve opening of the engine, and when the valve opening measured by the valve opening measurement means exceeds the minimum valve opening corresponding to the idle state of the internal combustion engine, the starting means and the maintenance means Control means for generating a stop signal for stopping at least one, and stop means for stopping at least one of the starting means and the maintaining means in response to the stop signal from the control means A remote starting system for an internal combustion engine for a vehicle, which comprises a. According to the present invention, a throttle valve which opens and closes in conjunction with an accelerator pedal is interposed in the above-mentioned intake pipe for taking in air from the outside of the vehicle into the internal combustion engine, and the intake of air sucked into the cylinder of the internal combustion engine Adjust the volume. When the opening of the throttle valve increases, the rotation speed of the internal combustion engine correspondingly increases, so that the throttle valve keeps the above-mentioned minimum valve opening while the maintaining means maintains the idle state. When the valve opening measured by the valve opening measuring means exceeds the minimum valve opening as the fail-safe operation, the control means of the remote starting device includes at least the starting means and the maintaining means by the stopping means. One operation is stopped. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, by directly detecting that the accelerator pedal is operated during the warm-up operation, it is possible to prevent the internal combustion engine from overheating by increasing the actual rotational speed beyond the rotational speed of the internal combustion engine corresponding to the idle state. It can be automatically prevented in advance.

Further, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, at least a signal generated accompanying the rotation of the internal combustion engine, Rotation speed estimation means for estimating the rotation speed of the crankshaft;
When the rotation speed estimated by the rotation speed estimation unit exceeds the minimum rotation speed corresponding to the idle state of the internal combustion engine, a control unit that generates a stop signal that stops at least one of the starting unit and the maintenance unit; and And a stopping means for stopping at least one of the starting means and the maintaining means in response to the stop signal. According to the present invention, the control means of the remote starter described above, as the fail-safe operation described above, the actual rotation speed estimated by the rotation speed estimation means from a signal generated accompanying the rotation of the internal combustion engine,
When the minimum number of revolutions of the internal combustion engine corresponding to the idle state is exceeded, at least one of the starting means and the maintaining means is stopped by the stopping means. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, it is possible to automatically prevent the internal combustion engine from being overheated by increasing the actual rotation speed beyond the rotation speed of the internal combustion engine corresponding to the idle state.

Further, according to the present invention, the signal generated accompanying the rotation of the internal combustion engine is supplied from the maintenance means to the internal combustion engine in order to control the injection timing of a fuel injection valve for supplying fuel to the internal combustion engine. Injection signal, an ignition signal given to the internal combustion engine from the maintaining means for controlling the ignition timing of a spark plug for burning the air-fuel mixture in the cylinder of the internal combustion engine, the air-fuel mixture in the cylinder of the internal combustion engine Immediately after the ignition of the air-fuel mixture by the spark plug, the confirmation signal given from the internal combustion engine to the maintenance means, and the rotation of the rotation shaft of the ignition timing control means for controlling the ignition timing of the spark plug. From the above, in order to detect the rotation angle of the crankshaft of the internal combustion engine, the crank angle signal given from the internal combustion engine to the maintaining means, and the mixture in the cylinder of the internal combustion engine In the ignition timing control means for controlling the ignition timing of the gas, the internal combustion engine detects the top dead center position from the rotation of the rotating shaft rotating in synchronization with the crankshaft. Or at least one of the crank angle reference position signals given to the control unit. According to the present invention, the signals used for estimating the rotational speed described above include, for example, an injection signal and an ignition signal provided from the maintaining means to the internal combustion engine, a confirmation signal provided from the internal combustion engine to the maintaining means, and a crank angle reference position signal. , And the crank angle signal. Since these signals are control signals that are originally used by the maintenance means to maintain the operating state of the internal combustion engine, they are compared with noise signals that are mixed in the minus terminal of an ignition device (igniter) used for detecting the rotational speed in the related art. Thus, the reading error is small. Therefore, the estimated error of the estimated rotational speed can be reduced as compared with the conventional rotational speed estimating method. Also, when the above-mentioned remote pointing device is retrofitted to an existing vehicle, these signals can be obtained by branching from the maintenance means, so that the installation portion of the internal combustion engine in the vehicle is compared with the prior art device. Until then, there is no need to route connecting wires, and mounting is easy.

Further, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and Remote operating means for instructing starting of the internal combustion engine from outside the vehicle to operate the maintaining means, vehicle speed measuring means for measuring at least a running speed of the vehicle in response to an instruction from the remote operating means, and vehicle speed measuring means Control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the traveling speed measured by the control means exceeds the stop state of the vehicle; and starting means in response to the stop signal from the control means. And a stopping means for stopping at least one of the maintenance means. According to the present invention, when an unmanned vehicle is to be warmed up using the above-described remote starter, the vehicle must be stopped. When the vehicle speed measured by the vehicle speed measurement unit exceeds the vehicle speed when the vehicle is stopped, the control unit of the remote start device described above performs at least one of the start unit and the maintenance unit when the vehicle speed measured by the vehicle speed measurement unit exceeds the vehicle speed when the vehicle is stopped. Stop one operation. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, when the vehicle starts running, the internal combustion engine can be automatically stopped immediately and the running of the vehicle can be stopped.

Further, the present invention provides a starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, at least the gas is discharged from the internal combustion engine and stored in a predetermined space. Exhaust gas concentration measuring means for measuring the concentration of the exhaust gas in the space; and stopping at least one of the starting means and the maintaining means when the concentration measured by the exhaust gas concentration measuring means is equal to or higher than a predetermined concentration. Control means for generating a signal; and a stopping means for stopping at least one of the starting means and the maintaining means in response to a stop signal from the control means. A remote starting system for an internal combustion engine for a vehicle which comprises and. According to the present invention, the control means of the remote starter described above performs the fail-safe operation when the concentration of the exhaust gas in the space measured by the exhaust gas concentration measuring means is equal to or higher than a predetermined concentration. The stopping means stops at least one operation of the starting means and the maintaining means. by this,
The starting operation and / or the maintaining operation described above are stopped. Therefore, it is possible to prevent the exhaust gas from filling the garage storing the vehicle, for example, due to the warm-up operation being performed.

According to the present invention, there is provided a starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, object detection means for detecting an object that has entered the interior of the vehicle, Control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the intruding object is detected by the object detection means; and in response to the stop signal from the control means, the start means and the maintenance means And a stopping means for stopping at least one of the two. According to the present invention, the control means of the remote starting device detects the presence or absence of an intruding object in the vehicle by the above-described object detecting means as the above-mentioned fail-safe operation. As a result, the operation of at least one of the starting means and the maintaining means is stopped. Thus, the starting operation and / or the maintaining operation described above are stopped. Therefore, when there is an intruder in the passenger compartment during the warm-up operation, the internal combustion engine can be automatically stopped.

Further, according to the present invention, the object detecting means is any one of a radar and an ultrasonic sensor for detecting an object in a vehicle interior, and a vibration sensor for detecting a vibration applied to a vehicle. There is a feature. According to the present invention, when a radar and an ultrasonic sensor are used as the above-described object detection means, it is possible to directly detect the presence or absence of a foreign object that has entered the vehicle interior. Further, when using a vibration sensor as the object detection means, for example, by detecting the vibration caused by the opening and closing operation of the door to enter the vehicle interior,
The presence or absence of the invading foreign matter can be estimated.

Also, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and In order to operate the maintenance means, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, measure a physical quantity that varies in accordance with the operation state of the internal combustion engine, When the measured physical quantity indicates a state that is incompatible with the continuation of the operation of the internal combustion engine, control means for generating a stop signal for stopping at least one of the start means and the maintenance means, and in response to the stop signal from the control means, A power supply cutoff unit that cuts off power supply to at least one of the starting unit and the maintaining unit, and a supply detection unit that detects whether power is supplied to the starting unit and the maintaining unit. Means, and when power is detected by the supply detecting means when the power is interrupted by the power supply interrupting means and when power is supplied to the starting means and the maintaining means, or when power is supplied by the power supply interrupting means. A failure determining means for determining that the power supply interrupting means has failed when it is detected that the power to the starting means and the maintaining means is interrupted, and a remote starting apparatus for the internal combustion engine for a vehicle. It is. According to the present invention, the starting means and the maintaining means of the internal combustion engine switch between operation and stop depending on whether or not power is supplied via the power supply cutoff means. The failure determination means compares the presence or absence of power supply interruption of the power supply interruption means with the presence or absence of actual power supply to the starting means and the maintenance means as described above, and makes a failure determination of the power supply interruption means. . This makes it possible to easily detect whether or not the power supply cutoff unit has a failure.

Further, according to the present invention, the power supply cutoff means includes:
Switching means for reversibly permitting or prohibiting power supply to the starting means and maintenance means, and forcibly prohibiting power supply when the failure determination means determines that the power supply cutoff means has failed; Inspection means for judging whether or not the power supply interrupting means and the switching means have a failure when the starting means and the maintenance means are stopped, wherein the power supply is permitted by the switching means, and the starting means and The power supply to the maintenance means is cut off, and the presence or absence of power supply to the starting means and the maintenance means is detected by the supply detection means. When the presence of power supply is detected, the power supply cutoff means has failed. The power supply is prohibited by the switching means, and the starting means and the maintenance means are controlled by the power supply cutoff means. Power supply, and the presence or absence of power supply to the starting means and the maintenance means is detected by the supply detection means, and when the presence of the power supply is detected, the inspection means for determining that the switching means has failed, and And when the inspection means determines that at least one of the switching means and the power supply cut-off means has failed, the operation of the starting means and the maintenance means is stopped. According to the present invention, the power supply cutoff means is provided with switching means for forcibly prohibiting power supply when the failure of the power supply cutoff means itself is determined. Also,
At least one operation of the starting means and the maintaining means can be stopped. Further, the failure of the power supply cut-off means and the switching means is determined in advance when the internal combustion engine is stopped, and if at least one of them has failed, the above-described starting means and maintenance means are stopped.
Thereby, the starting operation and the maintenance operation are performed in a state where one of the power supply cutoff means and the switching means has failed, and the other means has failed in the middle of the failure and the fail-safe operation described above cannot be performed. Can be prevented in advance.

Further, the present invention provides a starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means, and In order to operate the maintaining means, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, measure a physical quantity that fluctuates according to an operation state of the internal combustion engine, When the measured physical quantity indicates a state that is incompatible with the continuation of the operation of the internal combustion engine, control means for generating a stop signal for stopping at least one of the start means and the maintenance means, and in response to the stop signal from the control means, Power supply cut-off means for cutting off the supply of power to one of the starting means and maintenance means, rotation detection means for detecting the presence or absence of rotation of the internal combustion engine, and power supply And a failure determining means for determining that the power supply interrupting means has failed when rotation of the internal combustion engine is detected by the rotation detecting means when the power is interrupted by the disconnecting means. It is a remote starting device for the engine. According to the present invention, the failure determination means of the remote starter compares the presence / absence of power supply interruption of the power supply interruption means with the operation state of the internal combustion engine as described above, and compares the failure of the power supply interruption means. Make a decision. As described above, if the internal combustion engine is rotating when the power supply is interrupted, it is presumed that the power supply interrupting unit is in a state where the power supply cannot be interrupted. By performing a failure determination in such a manner, it is possible to detect the presence or absence of a failure in the power supply cutoff unit.

Further, according to the present invention, the power supply cutoff means includes:
When a failure of the power supply interrupting means is determined by the failure determining means, a prohibition means for forcibly prohibiting power supply to the starting means and the maintenance means is further included. According to the present invention, the power supply cutoff means includes a prohibition means in addition to the switching means, and when the power supply cutoff means fails, the power supply is forcibly prohibited by the prohibition means. Thus, even when both the power supply interrupting means and the switching means fail, the power supply can be interrupted by the prohibiting means, and at least one operation of the starting means and the maintenance means can be reliably stopped.

The present invention also relates to a rotation speed detecting apparatus for detecting a pulse signal generated accompanying rotation of an internal combustion engine and estimating the rotation speed of the internal combustion engine from the pulse interval of the pulse signal. Is an injection signal for controlling an injection timing of a fuel injection valve for supplying fuel into the internal combustion engine, and an ignition for controlling an ignition timing of a spark plug for burning an air-fuel mixture in a cylinder of the internal combustion engine. A signal, a confirmation signal output immediately after ignition of the air-fuel mixture by the spark plug to confirm combustion of the air-fuel mixture in the cylinder of the internal combustion engine, and a rotating shaft of ignition timing control means for controlling the ignition timing of the ignition plug. Crank angle signal for detecting the rotation angle of the crankshaft of the internal combustion engine from the rotation of the internal combustion engine, and ignition timing control for controlling the ignition timing of the air-fuel mixture in the cylinder of the internal combustion engine An internal combustion engine, which is one of crank angle reference position signals for detecting a top dead center position of a piston in a cylinder from rotation of a rotation shaft that rotates in synchronization with a crank shaft in a stage. Is a rotation speed detecting device. According to the present invention, the above-described rotational speed detecting device detects the rotation of the internal combustion engine from the above-mentioned signal, which is generated accompanying the rotation of the internal combustion engine and is a control signal used for controlling operation of the internal combustion engine. Guess the number. These signals have a smaller reading error than a noise signal mixed into a minus terminal of an ignition device (igniter) used for detecting the rotational speed in the related art. Therefore, the estimation error of the estimated rotation speed can be reduced as compared with the related art. In addition, since these signals are existing signals to be provided to a so-called electronic control unit (ECU), a connecting wire is added to the installation portion of the internal combustion engine as compared with the prior art device. This eliminates the need for wiring and facilitates installation.

[0028]

FIG. 1 is a block diagram showing a configuration of an electronic device 1 of a vehicle including a remote starting device for an internal combustion engine for a vehicle according to an embodiment of the present invention. The remote starter is
For example, when the warm-up operation of the internal combustion engine 3 is performed, the internal combustion engine 3 is used to remotely start the internal combustion engine 3 from outside the vehicle. The internal combustion engine 3 started by the remote starting operation using the remote starting device is kept idle while the vehicle is unmanned, and is stopped when the driver gets into the vehicle. From this state, the driver restarts the internal combustion engine to start running the vehicle.

The internal combustion engine 3 controlled by the electronic device 1
Is, for example, a four-cylinder four-cycle gasoline engine,
Equipped on the vehicle. The electronic device 1 controls, for example, the fuel injection amount of the internal combustion engine 3, the fuel injection timing, and the ignition timing of the air-fuel mixture.

The air-fuel mixture sucked into the cylinder 4 of the internal combustion engine 3 is supplied from a fuel injection valve 8 into a suction pipe 6 in which the amount of suction air into the suction pipe 6 is adjusted by a throttle valve 7. The fuel is mixed with the fuel injected into the suction pipe 6 and generated. The throttle valve 7 is installed in the intake pipe 6 upstream of the location where the fuel injection valve 8 is installed in the air flow, and its valve opening is determined in accordance with the amount of depression of the accelerator pedal 9 in the vehicle interior. You. The fuel injected from the fuel injection valve 8 is
It is stored in the fuel tank 10.

The internal combustion engine 3 has a plurality of cylinders 4,
An ignition plug 12 for igniting the intake air-fuel mixture is provided for each cylinder 4. In connection with this spark plug 12, an igniter 13, an ignition coil 14,
And a distributor 15. The ignition coil 14 is abbreviated as "IGC" in the drawings.
The distributor 15 is abbreviated as “D” in the drawing. Is provided. The igniter 13 is an ignition device installed in association with the ignition coil 14 and controls the timing of supplying and shutting off power to the coil 14. The distributor 15 is an ignition timing control device interposed between the ignition coil 14 and the ignition plug 12 of each cylinder, and controls the ignition timing between the cylinders. Details of these components 13 to 15 will be described later.

Exhaust gas from the internal combustion engine 3 is discharged to the outside of the vehicle through a discharge line 16 in which a catalyst 17 is provided. The catalyst 17 removes carbon monoxide (CO), hydrocarbons (HC), and nitrogen compounds (NO _x ) from the exhaust gas passing through the inside of the catalyst 17.

The internal combustion engine 3 includes a water-cooled cooling device 19 for cooling components including the cylinder 4, and a pressure-feed type lubrication device 2 that supplies lubricating oil to the components of the internal combustion engine 3.
0 is provided. The rotation of the crankshaft 22 of the internal combustion engine 3 is transmitted to the wheels 24 via the automatic transmission 23 and becomes the driving force of the vehicle. Further, a starter motor 26 which is a starting device of the internal combustion engine 3 is attached to the crankshaft 22.

The electronic device 1 described above includes a starter control circuit 3
1, a power supply 32, an ignition switch 33, a receiving circuit 39, switching circuits 45 to 47, sensors 51 to 62, an internal combustion engine control circuit 64, and warning lights 66 to 70.

The starter control circuit 31 controls each component described below in order to perform a remote start operation of the internal combustion engine.
In the remote start operation of the internal combustion engine 3, the driver of the vehicle sends a signal from the transmitter 34 outside the vehicle to the internal combustion engine 3 while the ignition switch 33 interposed between the power supply 32 and the electric components of the vehicle is shut off. To start. When an instruction is given, starter control circuit 31 switches to switching circuit 4 to be described later.
5 to 47, the power is forcibly supplied to each electric component in the vehicle while the switch 33 is shut off.
To start.

The transmitter 34 includes a start switch 36, a stop switch 37, and a transmission circuit 38. The transmitter 34 is, for example, remote instruction means owned by the driver of the vehicle, and instructs the electronic device 1 to start and stop the internal combustion engine 3 by wireless communication. For example, when the driver operates the start switch 36, the transmission circuit 38 transmits an instruction signal for instructing the internal combustion engine 3 to start. Further, when the stop switch 37 is operated, a stop signal for stopping the internal combustion engine 3 which is being started or is kept idle is transmitted. The instruction signal and the stop signal transmitted from the transmitting circuit 38 are received by a receiving circuit 39 including an antenna, and then provided to the starter control circuit 31.

The ignition switch 33 described above is
It has a key cylinder into which an ignition key is to be inserted, and includes an OFF contact, an ACC contact, an IG contact, and an ST contact. Each contact is made conductive by rotating an ignition key inserted into the key cylinder. A
Conductors 41 to 43 are connected to the CC contact, the IG contact, and the ST contact, respectively.

When the ACC contact of the ignition switch 33 is turned on, electric power is supplied from the power supply 32 to the electric equipment in the vehicle compartment, such as an acoustic device, through the conductor 41. When the IG contacts are turned on, electric power is supplied from the power supply 32 to the electrical components of the vehicle for controlling the internal combustion engine, including the internal combustion engine control circuit 64 described later, via the conductor 42. When the ST contact is turned on, power is supplied from the power supply 32 to the starter motor 26 via the conducting wire 43. The starter motor 26 operates at the same time as the power is supplied, transmits the rotational force to the crankshaft 22, and starts the internal combustion engine 3.

Switching circuits 45 to 47 for supplying power from the power supply 32 are connected to the conductors 41 to 43, respectively, bypassing the ignition switch 33. The switching circuits 45 to 47 are controlled by the starter control circuit 31. Details of the switching circuits 45 to 47 will be described later.

In the starter control circuit 31, from the plurality of sensors 51 to 59 installed on the peripheral parts of the internal combustion engine 3, each of the sensors 51 to 59 obtains a physical quantity that fluctuates according to the operating state of the internal combustion engine 3. A measurement signal representing the measurement result is given. The starter control circuit 31 is supplied with measurement signals representing physical quantities representing the vehicle and its surroundings from sensors 60 to 62 installed on vehicle components other than the peripheral components.

Among the above-mentioned sensors 51 to 62, the intake air temperature sensor 51 is installed on the intake pipe 6 at a position upstream of the air flow from the position where the throttle valve 7 is mounted, and measures the temperature of the intake air. The valve opening sensor 52 is installed in association with the valve body of the throttle valve 7 and measures the valve opening of the throttle valve 7. Further, the valve opening sensor 52 measures whether the internal combustion engine 3 is in an idle state or a high load state. The intake pressure sensor 53 is installed between the position where the throttle valve 7 and the fuel injection valve 8 are mounted in the intake pipe line 6, and measures the pressure of the intake air after adjusting the intake amount. The remaining fuel sensor 54 is installed inside the fuel tank 10 and measures the remaining fuel in the fuel tank 10.

The exhaust gas temperature sensor 55 is installed on the upstream side of the exhaust gas flow from the mounting position of the catalyst 17 in the exhaust pipe 16 and measures the exhaust gas temperature of the exhaust gas immediately after being disposed from the internal combustion engine 3. The cooling water temperature sensor 56 is connected to the cooling device 19.
Among them, for example, it is installed in the path of the cooling water flowing out of the water jacket in the cylinder block, and measures the temperature of the cooling water. The oil pressure sensor 57 is installed in the lubricating device 20 and measures the oil pressure of the lubricating oil in the device 20.

The crank angle sensor 58 is provided near the crankshaft 22 of the internal combustion engine 3 and directly measures the rotation angle of the crankshaft 22. The vehicle speed sensor 59 is connected to the automatic transmission 23
A transmission path for transmitting a rotational force from the vehicle to the wheels 24 or near the wheels detects a measured speed at which the vehicle travels.
The measurement signals of these sensors 51 to 59 are used not only for the fail-safe operation of the remote start operation of the internal combustion engine 3 in the starter control circuit 31 but also for the internal combustion engine control circuit 6 described later.
4 is also used for the operation control operation of the internal combustion engine 3.

The exhaust gas concentration sensor 60 measures the concentration of exhaust gas stored in a predetermined space outside or inside the vehicle. The predetermined space is, for example, the inside of a garage storing a vehicle or a vehicle interior. The exhaust gas concentration sensor 60 is installed, for example, inside a garage, an outer wall of a vehicle, or a vehicle interior. The exhaust gas concentration sensor 60 is realized by, for example, a carbon monoxide concentration sensor. As the exhaust gas concentration sensor 60, a sensor other than the above-described sensor may be used as long as the sensor detects the concentration of a component contained in the exhaust gas.

The object intrusion sensor 61 detects the presence or absence of an object that has entered the interior of the vehicle from the outside. The object intrusion sensor 61 is realized by, for example, at least one of a radar sensor, an ultrasonic sensor, and an infrared sensor. These sensors are installed in the cabin of the vehicle. The vibration sensor 62 is installed on the vehicle body and detects the presence or absence of vibration applied to the vehicle body.

The starter control circuit 31 estimates the current state of the internal combustion engine 3 and its peripheral parts and the vehicle from the measurement signals from the sensors 51 to 62, and performs a later-described fail-safe operation.

The internal combustion engine control circuit 64 is realized by a so-called electronic control unit. The control circuit 64 is supplied with measurement signals from the sensors 51 to 59 installed on peripheral components of the internal combustion engine 3.
The igniter 13 receives the IGf signal. The IGf signal is an ignition confirmation signal for confirming the ignition timing of the ignition plug 12 for the air-fuel mixture in the cylinder 4 of the internal combustion engine 3. The control circuit 64 supplies Ne and G signals from Ne and G signal generation circuits 111 and 112 installed in the distributor 15.
A signal is provided. The Ne signal is a crank angle signal for detecting the rotation angle of the crank shaft 22 of the internal combustion engine 3. The G signal is a crank angle reference position signal for detecting the top dead center position of the piston in the cylinder 4. The generation circuit and generation method for each signal will be described later.

The internal combustion engine control circuit 64 includes sensors 51 to 5
9 based on the measurement signal, the IGf signal, the Ne signal, and the G signal, the current operating state of the internal combustion engine 3 and its peripheral components is estimated, and based on the estimated operating state,
Generate a Gt signal and an injection signal. The IGt signal is an ignition signal for controlling the ignition timing at which the ignition plug 12 ignites the air-fuel mixture in the cylinder 4, and is given to the igniter 13. The injection signal is a signal for controlling the fuel injection amount and the injection timing of the fuel from the fuel injection valve 8, and is given to the fuel injection valve 8. The IGt signal and the injection signal are determined such that the estimated current operating states of the internal combustion engine 3 and its peripheral components approach the predetermined ideal operating states.

Further, the internal combustion engine control circuit 64 detects the presence or absence of abnormal operation of the internal combustion engine 3 and its peripheral components from the estimated current operating state of the internal combustion engine 3 and its peripheral components. When an abnormal operation is detected, warning lights 66 to 70 attached to the instrument panel in the vehicle compartment
At the same time, the fail-safe operation is performed on the internal combustion engine 3 and its peripheral components.

Among the warning lights 66 to 70, the fuel remaining amount warning light 66 is set so that the fuel remaining amount in the fuel tank 10 measured by the fuel remaining amount sensor 54 is less than a prescribed remaining amount that can travel a predetermined distance. Lights when it becomes Exhaust gas temperature abnormality warning light 67
Is turned on when the exhaust gas temperature measured by the exhaust gas temperature sensor 55 is equal to or higher than the upper limit of the operable temperature range of the catalyst 17. The oil pressure abnormality warning light 68 is
The light is turned on when the oil pressure of the lubricating oil measured at 7 is less than a predetermined oil pressure required for supplying the lubricating oil to the internal combustion engine 3. The water temperature abnormality warning light 69 is turned on when the water temperature of the cooling water measured by the cooling water temperature sensor 56 is equal to or higher than a predetermined water temperature sufficient for cooling the internal combustion engine 3. The check engine warning light 70 includes sensors 51 to 53, 58,
Lights up when the measurement signal from 59 indicates an abnormality in the physical quantity to be measured by each sensor, and when the rotation speed of the crankshaft 22 of the internal combustion engine 3 cannot be estimated by the rotation speed estimation method described later. Check engine warning light 70
Is also turned on when a failure of the sensors 51 to 59 is detected.

FIG. 2 is an equivalent circuit diagram showing a specific electrical configuration of the switching circuit 46 described above. The switching circuit 46
It includes an auxiliary relay circuit 71, a control relay circuit 72, and transistors T1 and T2.

One terminal of the switch SW1 of the auxiliary relay circuit 71 is connected to a conducting wire 73 branched from a power supply line from the power supply 32 to the ignition switch 33. One terminal of the switch SW2 of the control relay circuit 72 is IG
It is connected to the conducting wire 74 branched from the conducting wire 42 of the contact. Further, the other terminals of the switches SW1 and SW2 are connected in series. Thereby, the conducting wire 73, the switches SW1, SW
2, and the conducting wire 74 bypass the ignition switch 33 in this order to form a bypass circuit connecting the power supply 32 and the conducting wire 42.

One terminals of coils L1 and L2 of auxiliary and control relay circuits 71 and 72 are connected to power supply 32, respectively. The other terminals of the coils L1 and L2 are connected to the collector terminals of the transistors T1 and T2, respectively. The emitter terminals of the transistors T1 and T2 are grounded, and the base terminal is connected to the starter control circuit 31. Further, the conducting wire 74 branches off in the middle and is also connected to the starter control circuit 31.

The auxiliary and control relay circuits 71, 72
Only when the transistors T1 and T2 are in an on state for passing a current, the coils L1 and L2 are excited and the switch S
W1 and SW2 are made conductive. The starter control circuit 31
By switching the state of the transistors T1 and T2 to the on state or the off state for interrupting the current, the switches SW1 and SW2 of the relay circuits 71 and 72 are turned on or off.

The auxiliary relay circuit 71 is used for a fail-safe operation when the switching circuit 46 described later fails.
The switch SW1 is turned on only when the switching circuit 46 operates normally. The control relay circuit 72 is used for the remote start operation of the internal combustion engine 3, and
When the instruction signal is received from switch SW2, switch SW2 is turned on. When the switches SW1 and SW2 are both turned on, power is supplied from the power supply 32 to the components after the conductor 42 via the bypass circuit described above, and the switch SW1 is turned on.
When at least one of SW1 and SW2 is cut off,
No power is supplied to the second and subsequent components.

Switching circuits 45 and 47 have a structure similar to that of switching circuit 46, except that conductor 74 is connected to conductors 41 and 43, respectively. . In addition, the above-described switching circuits 45 to 47
May be replaced with a switching circuit 76 described below.

FIG. 3 is an equivalent circuit diagram showing a specific electrical configuration of the switching circuit 76. The switching circuit 76 differs from the switching circuit 46 only in that a switching element having a structure different from that of the control relay circuit 72 is used instead of the auxiliary relay circuit 71 and the transistor T1, and the operations of the other components and components are the same. Of the components of the switching circuit 76 of FIG. 3, the same components as those of the switching circuit 46 are denoted by the same reference numerals, and description thereof will be omitted.

For this switching element, for example, a field effect transistor 77 for power control is used. The starter control circuit 31 is connected in series with the gate terminal of the field effect transistor 77. Field effect transistor 77
Is directly controlled by the starter control circuit 31 so as to cut off the current in the bypass circuit when the control relay circuit 72 fails. As described above, when elements having different structures are used for the control relay circuit 72 and the fail-safe switching element, the failure rates of the control relay circuit 72 and the fail-safe switching element can be different from each other. Thereby, the probability that the control relay circuit 72 and the switching element fail at the same time can be reduced.

FIG. 4 is a flowchart for explaining the remote start operation of the internal combustion engine 3 in the starter control circuit 31 of FIG.

The starter control circuit 31 is operated by being supplied with power from the power supply 32 at all times, for example, when the vehicle is stopped and the ignition key is removed from the ignition switch 33. When the starter control circuit 31 starts operating, the process proceeds from step a1 to step a2, where it is determined whether or not the receiving circuit 39 has received an instruction signal from the transmitter. The determination in step a2 is based on the reception circuit 39
Is repeated until an instruction signal is received. When the instruction signal is received, the process proceeds from step a2 to step a3.

In step a3, the starter control circuit 31
It is determined whether or not the switching circuits 45 to 47 operate normally. A method for inspecting the operation states of the switching circuits 45 to 47 will be described below using the switching circuit 46 shown in FIG. 2 as an example.

First, the starter control circuit 31 determines whether the ignition switch 33 has an ACC contact, an IG contact,
With all of the T contacts closed, the auxiliary relay circuit 71 is turned on and the control relay circuit 72 is turned off. In this state, it is determined whether or not the reference voltage from the power supply 32 is applied to the conducting wire 74. When the reference voltage is applied, the control relay circuit 72 breaks down, and it is determined that the power cannot be cut off.
When it is determined that the reference voltage is not applied to the conductive wire 74 and the control relay circuit 72 is operating normally to cut off the power, the auxiliary relay circuit 71 is cut off and the control relay circuit 72 is turned on. , The above determination is made. When the reference voltage is applied to the conducting wire 74 in this state, it is determined that the auxiliary relay circuit 71 breaks down and the power cannot be cut off. When it is determined that at least one of the relay circuits 71 and 72 has failed, it is determined that the switching circuit 46 operates abnormally. Only when both the relay circuits 71 and 72 operate normally, it is determined that the switching circuit 46 is operating normally.

Each of the switching circuits 45 to 47 is inspected by the above-described inspection method, and when it is determined that any one of the circuits is operating abnormally, the process proceeds from step a3 to step a4. In step a4, the starter control circuit 31 prohibits the remote start operation of the internal combustion engine 3 and ends the processing operation of the flowchart as it is.

When the remote start operation is prohibited in step a4, the remote start operation is not performed thereafter even if the receiving circuit 39 receives the instruction signal. Thus, for example, when a failure occurs in which at least one of the switches SW1 and SW2 in each of the relay circuits 71 and 72 is welded, the warm-up operation of the internal combustion engine can be reliably stopped. Therefore, for example, when the warm-up operation is performed as it is when one of the relay circuits 71 and 72 is welded, the other circuit of the relay circuits 71 and 72 is further welded during the warm-up operation. In addition, it is possible to prevent the power supply from being interrupted due to the fail-safe operation described later.

Referring back to FIG. When it is determined in step a3 that all the switching circuits 45 to 47 are operating normally, the process proceeds to step a5. In step a5, the starter control circuit 31 turns on the switch SW2 of the control relay circuit 72 of the switching circuits 45 to 47. by this,
Since power is supplied from the power supply 32 to the starter motor 26 and the internal combustion engine control circuit 64 while the IG and ST contacts of the ignition switch 33 are cut off, the motor 26 and the circuit 64 start operating.

Accordingly, at the same time as the starter motor 26 forcibly rotates the crankshaft 22, the fuel injection from the fuel injection valve 8 and the ignition of the air-fuel mixture in the spark plug 12 are started by the internal combustion engine control circuit 64. You. After the internal combustion engine 3 is started, the circuit 31 stops the motor 26 by cutting off the power to the starter motor 26, and the driving state of the internal combustion engine 3 is maintained only by the internal combustion engine control circuit 64 so as to maintain the idle state. , The fuel injection amount, the injection timing, and the ignition timing.

When at least the switch SW2 of the switching circuits 45 to 47 is turned on in such a series of remote starting operations, the process proceeds from step a5 to step a6. Steps a6 to a16 are so-called fail-safe operations in the remote start operation of the internal combustion engine 3. The fail-safe operation detects in advance the inconvenience of the remote start operation such as the vehicle running during the remote start operation of the internal combustion engine 3 and the abnormal operation of the internal combustion engine 3, and performs the internal combustion when the inconvenience occurs. This is performed to stop the engine 3.
For example, among steps a6 to a16, step a7
To a10 are determination items for detecting the presence or absence of abnormal operation of the internal combustion engine 3. Steps a11 to a13 are determination items for detecting the presence or absence of abnormal operation of the warm-up operation in the unmanned vehicle. The determination operation of each item will be described in detail below.

In step a6, it is determined whether or not the remaining amount of fuel remaining in the fuel tank 10 measured by the fuel remaining amount sensor 54 is less than a predetermined remaining amount. The predetermined remaining amount is, for example, the remaining amount of fuel necessary for the vehicle to travel from the stop position of the vehicle to the nearest gas station. Specifically, on a highway, 50 km
Since gas stations are installed at intervals, for example, the remaining fuel amount necessary for the vehicle to travel 50 km is set as the specified remaining amount.

When the fuel is reduced below the specified remaining amount, when the driver attempts to run the vehicle after ending the remote start operation, there is a possibility that the fuel may run short and the vehicle may not be able to run. . The determination in step a6 is performed in advance to prevent the vehicle from running impossible due to such a shortage of fuel. In step a6, when the measured remaining amount is less than the specified remaining amount, it is determined that the remote start operation should be stopped. Only when the measured remaining amount is equal to or more than the specified remaining amount, the process proceeds to step a7.

In step a7, it is determined whether or not the measurement signals from the sensors 51 to 59 installed on the internal combustion engine 3 and its peripheral parts are abnormal. As described above, the internal combustion engine control circuit 64 estimates the current operating state of the internal combustion engine 3 based on the measurement signals from the sensors 51 to 59, and based on the estimated operating state, the fuel injection valve 8 and the spark plug 12 Control the operation of. For example, the fuel injection valve 8
The fuel injection amount and injection timing from the engine, and the ignition timing for the air-fuel mixture are controlled. These sensors 51
When at least one of the failures 59 to 59 has failed, a physical quantity that fluctuates in accordance with the operating state of the internal combustion engine 3 cannot be obtained by the amount measured by the failed sensor. An error occurs in the estimated driving state at 64. Therefore, the internal combustion engine control circuit 64
It becomes difficult to determine the fuel injection amount, the fuel injection timing, and the ignition timing suitable for the current driving state. The determination in step a7 is performed in order to prevent the abnormal operation of the internal combustion engine 3 due to the abnormal operation of the internal combustion engine control circuit 64 in advance.

Further, in the internal combustion engine control circuit 64, when the IGf signal from the igniter 13 cannot be obtained, even if the internal combustion engine control circuit 64 provides the igniter 13 with the IGt signal, misfire occurs due to failure of the parts 12 to 15. It becomes difficult to estimate what has occurred. When the Ne signal and the G signal from the distributor 15 are not supplied to the internal combustion engine control circuit 64, the circuit 64 has difficulty in estimating the current rotational speed and rotational angle of the crankshaft 22 of the internal combustion engine 3. . If the rotation speed and the rotation angle cannot be estimated, it becomes difficult to determine the above-described injection timing and ignition timing, and to control the internal combustion engine 3 appropriately.

From the above, the starter control circuit 3
1 determines that the remote start operation of the internal combustion engine 3 should be stopped even when each signal from the igniter 13 and the distributor 15 cannot be obtained. This makes it difficult for the internal combustion engine control circuit 64 to estimate the current drive state of the internal combustion engine 3, and prevents the control from becoming unstable and causing the internal combustion engine 3 to operate abnormally in advance.

Further, the starter control circuit 31 performs the determination operation of step a6 and steps a8 to a
If the physical quantity which is not determined in the determination operation of step 11 and fluctuates accompanying the driving state of the internal combustion engine 3 is out of a predetermined range, there is a possibility that the abnormal operation of the internal combustion engine 3 may be caused. When it is determined that there is, the remote start operation is similarly stopped. The physical quantity includes, for example, the temperature and pressure of the intake air, and the oxygen concentration in the exhaust gas measured by an oxygen concentration sensor provided upstream of the catalyst 17 in the exhaust pipe 16 in the gas flow.

The above-mentioned sensors 51 to 59 are often designed to output a measurement signal representing a physical quantity that deviates from a specified range when the sensor itself fails. Therefore, by determining whether the physical quantity represented by the measurement signal is within a predetermined range, it is possible to simultaneously determine the abnormal operation of the internal combustion engine 3 and the failure of the sensors 51 to 59.

With such an operation, it is possible to prevent the internal combustion engine control circuit 64 from being unable to control the internal combustion engine 3. Only when it is determined that all the sensors 51 to 59 are operating normally, the process proceeds from step a7 to step a8.

At step a8, it is determined whether or not the exhaust gas temperature measured by the exhaust gas temperature sensor 55 is equal to or higher than a predetermined temperature. When exhaust gas having a temperature exceeding the upper limit of the predetermined operating temperature range flows into the catalyst 17, it becomes difficult to remove the above-mentioned substances. Is discharged. Also, when the exhaust gas temperature rises,
The catalyst 17 may be destroyed. The determination in step a8 is made in order to prevent these inconveniences in advance.

The predetermined temperature is set at or below the upper limit of the operating temperature range in which the catalyst 17 can operate normally to remove carbon monoxide, hydrocarbons and nitrogen compounds. Specifically, the specified temperature is set to, for example, 900 °. The starter control circuit 31 determines that the remote start operation should be stopped when the exhaust temperature is equal to or higher than the specified temperature, and proceeds to step a9 from step a8 when the exhaust temperature is lower than the specified temperature. In this way, by stopping the remote start operation when the exhaust gas temperature is equal to or higher than the specified temperature, for example, during warm-up operation, the exhaust gas having the exhaust gas temperature equal to or higher than the upper limit temperature passes through the catalyst, and the substance is removed. It can be prevented in advance that the exhaust gas is exhausted without being removed and that the catalyst breaks down.

At step a9, it is determined whether or not the oil pressure of the lubricating oil measured by the oil pressure sensor 57 is less than a predetermined specified oil pressure. The predetermined hydraulic pressure is set to be equal to or higher than the lower limit of the hydraulic pressure at which lubricating oil can be sufficiently supplied to the internal combustion engine 3 and its components in the lubricating device 20, for example. In the lubricating device 20 of the pumping type, a predetermined pressure is applied to the lubricating oil, and the lubricating oil is lubricated in the lubricating device 20 and the internal combustion engine 3. Therefore, when the oil pressure of the lubricating oil decreases, the circulation of the lubricating oil becomes poor, and the internal combustion engine 3
In addition, the supply of lubricating oil to the components becomes insufficient.
At this time, a cause of the abnormal operation of the internal combustion engine 3 such that the frictional force of the components increases. The determination in step a9 is performed in order to prevent such an abnormal operation of the internal combustion engine 3 due to the lack of lubricating oil in advance.

The starter control circuit 31 determines that the remote start operation should be stopped when the measured oil pressure is lower than the specified pressure, and proceeds from step a9 to step a10 only when the measured oil pressure is equal to or higher than the specified pressure. As described above, by stopping the internal combustion engine when the oil pressure of the lubricating oil is equal to or lower than the specified pressure, for example, during warm-up operation, an abnormal operation of the internal combustion engine due to insufficient lubricating oil supply can be automatically determined in advance. Can be prevented.

In step a10, the cooling water temperature sensor 56
It is determined whether or not the coolant temperature measured by the above is equal to or higher than a predetermined temperature. The aforementioned internal combustion engine 3
Since the air-fuel mixture is heated by burning in the cylinder 4, its components are always cooled by a water-cooled cooling device 19. When these components are not sufficiently cooled, expansion and deterioration of the strength of the components and poor lubrication between the components occur, causing abnormal operation of the internal combustion engine 3. The determination in step a10 is performed to prevent abnormal operation of the internal combustion engine 3 due to insufficient cooling of the internal combustion engine 3.

The predetermined temperature is set to be lower than the upper limit of the cooling water temperature at which the cooling device 19 can sufficiently cool the components of the internal combustion engine 3 and its peripheral components. The specified temperature is specifically set to, for example, 105 °. The starter control circuit 31 determines that the remote start operation should be stopped when the measured coolant temperature is equal to or higher than the specified water temperature, and proceeds to step all only when the measured temperature is lower than the specified temperature. Thus, by stopping the internal combustion engine when the temperature of the cooling water is equal to or higher than the specified water temperature,
For example, an abnormal operation of the internal combustion engine caused by overheating of the internal combustion engine can be automatically prevented in advance, for example, during a warm-up operation.

At step a11, it is determined whether or not the accelerator pedal 9 has been operated. In the remote start operation of the internal combustion engine 3, the internal combustion engine 3 is controlled by the internal combustion engine control circuit 64 so as to maintain the idle state after the start. For example, when the accelerator pedal 9 is depressed in a state where an object at the driver's seat is pressing the accelerator pedal 9 in the cabin of the vehicle, the valve opening of the throttle valve 7 becomes idle. Since the opening degree becomes larger than the corresponding minimum valve opening degree, the rotation speed of the internal combustion engine 3 may increase and exceed the idle state. The determination in step a11 is
As described above, the operation is performed to prevent the internal combustion engine 3 from operating beyond the idle state.

The determination of whether or not the accelerator pedal 9 has been operated is
For example, the determination is performed by determining whether or not the valve opening of the throttle valve 7 measured by the valve opening sensor 52 exceeds the minimum valve opening corresponding to the idle state. In this case, when the measured minimum valve opening is exceeded, it is determined that the accelerator pedal 9 is operated. The internal combustion engine 3
This is performed by measuring the current rotational speed of the vehicle and determining whether the measured rotational speed has exceeded the minimum rotational speed corresponding to the idle state. In this case, when the measured rotation speed exceeds the idle rotation speed, it is determined that the accelerator pedal 9 is operated.

The rotation speed of the internal combustion engine 3 may be directly measured by the crank angle sensor 58 from the rotation of the crankshaft 22. In addition, a control signal supplied from the internal combustion engine control circuit 64 to peripheral components of the internal combustion engine 3 and a signal that varies from the peripheral component to the internal combustion engine control circuit 64 in response to a cycle of the internal combustion engine 3 are used. Alternatively, the rotation speed may be estimated. This signal includes, for example, the aforementioned injection signal, IGt signal, IGf signal, Ne signal, and G signal. Details of these signals and a method of estimating the number of revolutions from the signals will be described later. If at least one of these signals is used, the rotation speed can be estimated. Further, the rotational speed is estimated from a plurality of signals among the above-described signals, an average value of the rotational speed estimated from each signal is obtained, and the average value is used to determine whether the accelerator pedal 9 is operated. Is preferred.

Whether or not the accelerator pedal 9 has been operated can be determined by such a plurality of methods. In the determination in step a11, the determination is performed using at least one of the above-described methods. In addition, the presence or absence of operation of the accelerator pedal 9 is determined by using each of a plurality of methods among these methods, and only when it is determined that the accelerator pedal 9 is not operated by all of the methods, the process in step a11 is performed. It may be determined that there is no operation of the accelerator pedal 9. When it is determined that the accelerator pedal 9 is operated by such a determination method, the starter control circuit 31 determines that the remote start operation of the internal combustion engine 3 should be stopped, and the accelerator pedal 9 is not operated. Only when it is determined that step a11 to step a1
Proceed to 2. In this way, by stopping the warm-up operation when the accelerator pedal 9 is operated, for example, it is predicted that the actual rotation speed of the internal combustion engine 3 exceeds the minimum rotation speed during the warm-up operation. can do. Therefore, it is possible to prevent the internal combustion engine 3 from being overheated due to an increase in the rotation speed.

At step a12, it is determined whether or not the vehicle is running. The warm-up operation of the internal combustion engine 3 is based on the premise that the vehicle is stopped. For example, when the brake is accidentally released, the vehicle travels by starting the internal combustion engine 3 by a remote start operation. May start. The determination in step a12 is performed to prevent the vehicle from running. Whether the vehicle is running
For example, it is determined whether or not the vehicle speed of the vehicle measured by the vehicle speed sensor 59 has exceeded 0 km / h. Starter control circuit 31
Determines that the remote start operation of the internal combustion engine 3 should be stopped when the vehicle starts running, and proceeds from step a12 to step a13 only when the vehicle is stopped. Accordingly, when the vehicle starts running by mistake during the warm-up operation, the internal combustion engine 3 can be automatically stopped immediately and the running of the vehicle can be stopped.

At step a13, it is determined whether or not exhaust gas is filled in the vehicle interior of the vehicle and in a predetermined space including the vehicle. In the warm-up operation using the remote start operation, when it is predicted that the internal combustion engine 3 is sufficiently warmed up after instructing the remote start operation, the driver of the vehicle approaches the vehicle being warmed up from outside the vehicle. However, at this time, if exhaust gas is filled around the vehicle, it becomes difficult to approach the vehicle. The determination in step a13 is performed in advance to prevent the driver from approaching the vehicle due to the exhaust gas discharged from the internal combustion engine 3 during the warm-up operation using such a remote start operation.

More specifically, the above determination is made by determining whether the concentration of exhaust gas in a predetermined space measured by the above-described exhaust gas concentration sensor 60 is lower than the predetermined concentration. . In this case, it is determined that the exhaust gas is not full only when the concentration is lower than the predetermined concentration. The predetermined space is the vehicle compartment or the garage as described above, but since the driver approaches the vehicle from outside the vehicle, it is preferable to determine whether the space outside the vehicle is full of exhaust gas. The starter control circuit 31 determines that the remote start operation of the internal combustion engine 3 should be stopped when the space is full of exhaust gas, and only when it is determined that the space is not full, the step a13 to step a14. Proceed to. In this way, by stopping the warm-up operation in the above-described situation, it is possible to prevent the influence of the exhaust gas on others and the driver near the vehicle during the warm-up operation. .

At step a14, the object intrusion sensor 61
It is determined whether or not an object intrusion into the vehicle compartment of the vehicle has been detected. It is a precondition that the remote start operation described above is performed in an unmanned vehicle. For example, when another person other than the driver of the vehicle enters the vehicle interior without holding the ignition key of the vehicle during the remote start operation, the brake is released without conducting the ignition switch 33 using the ignition key. There is a possibility that the vehicle can be driven simply by doing. The determination in step a14 is
In this way, the present invention is implemented to prevent another person from driving the vehicle without the driver's permission. Starter control circuit 31
Determines that the remote start operation of the internal combustion engine 3 should be stopped when there is an intruding object, and proceeds from step a14 to step a15 only when it is determined that there is no intruding object.

At step a15, it is determined whether or not abnormal vibration has been applied to the vehicle. When a person attempts to enter the interior of a vehicle, vibrations are applied to the vehicle itself, for example, by opening and closing a door of the vehicle. By regarding such vibrations as abnormal vibrations of the vehicle and measuring them with the vibration sensor 62, it is possible to detect the intrusion of a person into the vehicle interior similarly to the aforementioned intrusion sensor 61. The determination in step a15 is performed to prevent another person from driving the vehicle without the driver's permission for the same reason as the determination in step a14.

The detection of the intrusion of an object using the presence or absence of such a vibration is performed after the start operation of the internal combustion engine 3 is completed and when the rotation of the internal combustion engine 3 is stabilized, for example, to maintain an idle state. This is because during the starting operation of the internal combustion engine 3, vibration different from that when maintaining the idle state is applied, so whether the added vibration is caused by the intrusion of an object or by the starting operation of the internal combustion engine 3 Is difficult to determine. Therefore, the vibration sensor 6
When the rotation of the internal combustion engine 3 is stabilized, 0 measures abnormal vibration other than vibration applied to the vehicle by maintaining the idle state of the internal combustion engine 3. The starter control circuit 31 determines that the remote start operation of the internal combustion engine 3 should be stopped when the abnormal vibration of the vehicle is measured, and proceeds from step a15 to step a16 only when it is determined that there is no abnormal vibration. As described above, by stopping the warm-up operation in the above-described situation determined by the two parameters of the object detection and the presence or absence of the vibration, the running of the vehicle is started by another person because the warm-up operation is performed. Can be prevented beforehand.

At step a16, it is determined whether or not the ignition key of the vehicle has been inserted into the key cylinder associated with the ignition switch 33. In order to detect whether or not the ignition key has been inserted, for example, a detection switch that is turned on when the ignition key is inserted into the key cylinder is installed in the key cylinder. The above determination is specifically performed by measuring whether or not the detection switch is turned on.

The remote start operation of the internal combustion engine 3 is used for a so-called warm-up operation. In order to prevent duplication, the internal combustion engine 3 is temporarily stopped. The determination in step a16 is performed to determine whether the internal combustion engine has stopped. Further, when the driver enters the vehicle interior, it is determined that an object has intruded by the determinations in step a14 and step a15 described above, so that the internal combustion engine 3 may be stopped at this point. If it is determined in step a16 that the ignition key has not been inserted, the process returns to step a6 again, and the process returns to step a6 to step a16.
Is repeated for fail-safe operation.

The determination operation in steps a6 to a16 is repeated until the determination condition is satisfied in any of the steps and it is determined that the remote start operation should be stopped. Step a
If it is determined in any one of Steps 6 to a16 that the remote start operation of the internal combustion engine 3 should be stopped, Steps a6 to a16 to Step a16
Proceed to 17. In steps a17 to a19, the remote start operation is stopped.

In step a17, the starter control circuit 3
1 is a switching circuit 45-47 via a transistor T2.
The control relay circuit 72 is shut off. As a result, the starter motor 26 and the internal combustion engine control device 64 stop operating. The fuel injection operation of the fuel injection valve 8 of the internal combustion engine 3 and the ignition operation of the ignition plug 12 are performed by the internal combustion engine control circuit 64.
Is executed only during the operation, and when the circuit 64 is stopped, the internal combustion engine 3 is also stopped in conjunction therewith. In addition, by stopping the starter motor 26 at the same time, for example, when the above-described determination condition of the determination item is satisfied during the startup operation of the internal combustion engine 3, the startup operation can be stopped halfway.
When the control relay circuit 72 is shut off, the process proceeds to steps a17 to a18.

In step a18, the starter control circuit 3
At 1, it is determined whether the control relay circuit 72 has failed. The failure determination of the control relay circuit 72 is performed by, for example,
After the circuit 31 controls the control relay circuit 72 to be cut off in step a17, the determination is made by determining whether or not power is supplied to the conductor 74. In this case, it is determined that a failure has occurred when power is supplied to the conductor 74. As a cause of the failure of the control relay circuit 72, for example, welding of the switch SW2 can be considered.

The above determination is made by the control relay circuit 72.
The rotation speed of the internal combustion engine 3 after the shutoff control may be measured or estimated, and the determination may be made based on whether or not the rotation of the internal combustion engine 3 continues after the shutoff control. In this case, when the rotation is continued, it is considered that electric power is still being supplied to the starter motor 26 and the internal combustion engine control circuit 64, and it is determined that the control relay circuit 72 has failed. in this way,
Only when the control relay circuit 72 has failed, the process proceeds from step a18 to step a19.

At step a19, the auxiliary relay circuit 71 of the switching circuits 45 to 47 is cut off via the transistor T1, and the supply of power to the starter motor 26 and the internal combustion engine control circuit 64 is prohibited. Thus, even when the control relay circuit 72 is out of order, the remote start operation can be reliably stopped by the auxiliary relay circuit 71. When it is determined in step a18 that the control relay circuit 72 is operating normally, and in step a1
After the auxiliary relay circuit 71 is shut off in step 9,
The process proceeds to 20 and the processing operation of the flowchart is ended.

By such a series of processing operations, a remote start operation including a fail-safe operation can be performed. Further, as the determination items of the fail-safe operation in step a6 to step a16, only some of the above-described items may be performed, or other items may be added. In order to reliably perform the fail-safe operation, it is preferable to perform the determination operation over many items.

Further, the above-mentioned steps a6 to a1
Although the determination of 0 is performed by the starter control circuit 31, the same determination is also performed in the internal combustion engine control circuit 64 as the determination of whether or not the warning lights 66 to 70 are turned on. Therefore, these determinations may be performed separately by the starter control circuit 31 and the internal combustion engine control circuit 64, or may be performed by only one of the circuits and the other circuit may introduce only the determination result. It may be. For example, when the result of the determination of whether or not the warning lights 66 to 70 are turned on by the internal combustion engine control circuit 64 is introduced into the starter control circuit 31, when it is determined that the warning light is to be turned on, a corresponding The determined item may be determined to be abnormal.

The determination operations in steps a6 to a16 may be performed not only in the above-described steps but also before the starter motor 26 starting operation in step a5. By performing the determination on the above-described fail-safe operation determination item before the starter motor 26 is started, when any one of the above-described items is abnormal before the internal combustion engine 3 is started, the remote start operation is performed. Can be stopped in advance, and abnormal operation of the internal combustion engine 3 can be more reliably prevented.

Another example electronic device including the remote starter of the present invention is described below. This electronic device differs from the above-described electronic device 1 in FIG. 1 only in that the switching circuits 45 to 47 are replaced with a switching circuit 78 described below, and the other structures are the same. Description of the same structure is omitted.

FIG. 5 is an equivalent circuit diagram showing a specific electrical configuration of switching circuit 78. The switching circuit 78 differs from the switching circuit 46 only in that a fuse 79 is attached instead of the auxiliary relay circuit 71 of the switching circuit 46, and the other structure is the same as the switching circuit 46. Components of the switching circuit 78 having the same structure as the switching circuit 46 are denoted by the same reference numerals, and description thereof will be omitted.

Fuse 79 is interposed between lead 73 and switch SW2 instead of switch SW1. A collector terminal of the transistor T1 is connected to a conductor between the fuse 79 and the control relay circuit 72. The gate terminal of the transistor T1 is connected to the starter control circuit 31, and the emitter terminal is grounded. Starter control circuit 31
Switches the transistor T1 to the ON state when it is determined in step a18 of the above-described flowchart that the control relay circuit 72 has failed. As a result, an abnormal current greater than the capacity of the fuse flows from the power supply 32 to the fuse 79, and the fuse is blown. by this,
When the control relay circuit 72 fails, the switching circuit 7
8 can be stopped.

Once the fuse 79 has been blown, the power supply to the bypass circuit cannot be restored until the fuse itself is replaced, so that the failure determination of the switching circuit in step a3 in the above-described flowchart cannot be performed. Therefore, in the remote start operation of the internal combustion engine 3 using the electronic device of this example, only the determination operation of step a3 is skipped in the flowchart of FIG. 4, and if it is determined in step a2 that the instruction signal has been received, the operation is continued. Proceeding to step a5, the starter motor is started. Subsequent processing operations are the same as those in the flowchart of FIG.

As described above, by using different structures for the control relay circuit 72 and the fail-safe means, it is possible to prevent simultaneous failure of the fail-safe means and the control relay circuit 72. . Also,
Compared to a relay circuit and a field-effect transistor capable of reversibly shutting off power supply, the fuse 79 for irreversibly shutting off power supply has a simpler structure than the above-described reversible components, The structure of the device can be simplified.

Hereinafter, a method of estimating the rotational speed of the internal combustion engine 3 in the starter control circuit 31 will be described. The above-mentioned internal combustion engine control circuit 64 gives control signals to the fuel injection valve 8 and the igniter 13 in order to control the operation state of the internal combustion engine 3. Signals from the igniter 13 and the distributor 15 are supplied to the circuit 64 for controlling the internal combustion engine 3. The starter control circuit 31 branches and introduces these signals from a conductor which is a transmission path between the internal combustion engine 3 and the internal combustion engine control circuit 64, and estimates the rotation speed of the internal combustion engine 3 from the signals. As a result, a signal can be introduced from at least before and after the input / output terminal of the circuit 64, so that it is not necessary to provide a new measuring means near the internal combustion engine 3 and its peripheral parts for estimating the rotational speed.

Hereinafter, a method for generating the above-described signals and a method for estimating the number of revolutions from each signal will be described. In the following description, it is assumed that the internal combustion engine 3 is a four-cylinder four-cycle gasoline engine.

FIG. 6 is an equivalent circuit diagram showing a specific electrical configuration of the fuel injection valve 8 and the fuel injection control unit 81 in the internal combustion engine control circuit 64.

The above-described fuel injection valve 8 is provided, for example, in the intake pipe 6 at the front stage of each cylinder of the internal combustion engine 3.
Fuel is injected by opening each fuel injection valve 8 only while power is supplied to the internal solenoid coil L3 to excite the fuel.

The fuel injection control section 81 includes a processing circuit 83, an operation circuit 84, a resistor R1, and transistors T3 and T4.

One terminal of the coil L3 of the fuel injection valve 8 is
IG contact of ignition switch 33, line 42,
The power supply 32 is connected via the control relay circuit 85 and the auxiliary relay circuit 86. The other terminal of the coil L3 is connected to the collector terminal of the transistor T3 of the fuel injection control unit 81, and is grounded via the transistor T3 and the resistor R1. One terminal of the coil L3 is connected to the collector terminal of the transistor T4 for blocking the back electromotive force. The collector terminal of the transistor T3 and the emitter terminal of the transistor T4 are connected via the diode D1 such that the forward output terminal of the diode D1 is connected to the emitter terminal. Further, the transistor T
3, T4 base terminals are connected to the fuel injection valve drive circuit 84, respectively.

The relay circuits 85 and 86 are controlled by the operation circuit 84, and are turned on in conjunction with the IG contact of the ignition switch 33 being turned on. Processing circuit 8
Numeral 3 is realized by a microcomputer, for example, and determines the fuel injection amount and the injection timing based on the measurement signals from the sensors 51 to 59 described above. 84
Give to.

When the cycle reaches the injection start timing based on the applied injection signal and the progress of the cycle of the internal combustion engine 3, the drive circuit 84 turns on the transistor T3 so that current can pass. As a result, electric power is supplied to the coil L3, and fuel injection is started. After the start of fuel injection, the drive circuit 84 detects the potential of the connection point P1 between the emitter terminal of the transistor T3 and the resistor R1, and switches the transistor T3 to an off state in which the current is cut off when the potential rises to a predetermined value or more. . This operation is repeated a plurality of times until the fuel injection amount determined by the processing circuit 83 is completed. At this time, the transistor T4
Absorbs the back electromotive force of the coil L3 generated when the transistor T1 is switched between the on state and the off state, and suppresses a sharp decrease in the current flowing through the coil L3. As described above, the fuel injection control unit 81 controls the fuel injection amount and the injection timing by controlling the power supply timing and the supply time to the solenoid coil L3.

The injection signal described with reference to FIG.
Corresponds to the injection signal given to the drive circuit 84 from
Since the injection signal is a signal inside the internal combustion engine control circuit 64,
It is difficult to branch out and take it out. Therefore, FIG.
In the electronic device 1 having the fuel injection valve 8 of the circuit described above, the starter control circuit 31 determines whether there is a current flowing through the one terminal on the power supply side of the coil L3 only during fuel injection among signals external to the fuel injection control unit 81. , The rotational speed of the crankshaft of the internal combustion engine 3 is estimated.

In a four-cycle gasoline engine, fuel injection is performed once every two revolutions of the crankshaft 22, so that two consecutive inflow timings at which the current starts flowing to one terminal of the coil L3 described above. The elapsed time between the two times coincides with the time required for the crankshaft 22 to make two rotations. Therefore, the starter control circuit 31 measures this elapsed time, and obtains the reciprocal of a value twice as long as the elapsed time as a value of the number of revolutions per unit time.

FIG. 7 is an equivalent circuit diagram showing a specific electrical configuration of the igniter 13, the ignition coil 14, and the ignition control unit 91 of the internal combustion engine control circuit 64.

The ignition control unit 91 includes an input circuit 93, a processing circuit 94, a constant voltage power supply circuit 95, and a transistor T5.
It is comprised including. The ignition control unit 91 determines the ignition timing for the air-fuel mixture in the ignition plug 12 based on the Ne signal and the G signal from the distributor 15 described above.

The Ne signal and the G signal are first subjected to rectification and level conversion in the input circuit 93 and then to the processing circuit 9.
4 given. The processing circuit 94 is implemented by a microcomputer, and estimates the angle of the crankshaft 22 and the position of the top dead center of the piston based on the Ne signal and the G signal. Next, the ignition timing of the next cycle is determined from the estimated current angle and the top dead center position.

The processing circuit 94 switches the transistor T5 between the on state and the off state based on the determined ignition timing. A constant voltage power supply circuit 95 is connected to the emitter terminal of the transistor T5 via a resistor, and a conductor 96 is connected to the collector terminal. The conductor 96 is a conductor for transmitting the above-mentioned IGt signal supplied from the internal combustion engine control circuit 64 to the igniter 13. By switching the state of the transistor T5, the processing circuit 94 supplies or cuts off power from the circuit 95 to the conductor 96, and generates an IGt signal. Specifically, the processing circuit 95 sets the transistor T at a timing earlier by a predetermined time than the ignition timing.
5 is switched on, and when the ignition timing is reached, the transistor T5 is switched from on to off.
Therefore, the IGt signal of the conductor 96 is a square wave signal that rises before the ignition timing, maintains a high level for a predetermined time, and falls at the same time as the ignition timing.

The igniter 13 includes a drive circuit 101, a closing angle control circuit 102, an overcurrent prevention circuit 10
3. Constant current control circuit 104, lock prevention circuit 105, IGf signal generation circuit 106, and transistor T
6 is included. The above-mentioned ignition coil 1
The control terminal 4 is connected to the collector terminal of the transistor T6 and is grounded via the transistor T6 and the resistor. The connection terminal of the ignition coil 14 is connected to one of the plurality of cylinders of the internal combustion engine 3 via a distributor 15.
The drive circuit 101 is a circuit that generates a signal to be supplied to a base terminal to switch the ON state and the OFF state of the transistor T6, and operates based on signals from the circuits 102 to 105. Further, the emitter terminal of the transistor T6 is connected to the IGf signal generation circuit 102.

The aforementioned IGt signal is supplied to the closing angle control circuit 10
2 given. Since the high level duration of the IGt signal is always constant, the closed circuit control circuit 102
When a square pulse of the signal rises based on the signal, the power supply start timing at which the primary current starts flowing through the ignition coil 14 is determined based on the current rotational speed of the internal combustion engine and the ignition timing one cycle before. . The energization cutoff timing coincides with the fall timing of the IGt signal.

The drive circuit 101 includes a closing angle control circuit 1
02, the transistor T6 is turned on, a primary current flows through the ignition coil, and the transistor T6 is turned off at the cutoff timing.
6 is turned off to cut off the primary current. By applying a high voltage generated in the secondary coil of the ignition coil 14 by this operation to a spark plug connected via the distributor 15, the mixture in the cylinder 4 is ignited.

Overcurrent prevention circuit 103, constant current control circuit 1
04, the lock prevention circuit 105 is a circuit provided for protecting the ignition coil 14 and the transistor T6. Is forcibly switched to the off state.

The IGf signal generation circuit 106 detects the back electromotive force generated in the ignition coil 14 when the primary current is cut off by switching the transistor T6 to the off state, and generates the IGf signal described above. IGf
The signal is a pulse signal whose pulse rises almost in synchronization with the ignition timing. This IGf signal is supplied to the ignition control unit 9
1 processing circuit 94.

When the rising edge of the pulse of the IGf signal is not detected continuously during one or two rotations of the internal combustion engine, the processing circuit 94 determines that a misfire has occurred, and executes the fuel injection of the misfired cylinder. Perform fail-safe operation to stop.
Further, if the rise of the pulse of the IGf signal is not detected during one rotation of the internal combustion engine after the misfire of a certain cylinder is determined, it is determined that the misfire has occurred continuously in all the cylinders.

In the four-cycle internal combustion engine 3 having a plurality of cylinders, the ignition plugs 12 of the respective cylinders are ignited once at substantially equal intervals while the crankshaft 22 rotates twice. Therefore, in a four-cylinder four-cycle gasoline engine, the square pulse of the IGt signal and the pulse of the IGf signal rise four times while the crankshaft 22 of the internal combustion engine 3 rotates twice. The starter control circuit 31 measures, for example, an interval time between two successive rising edges of each signal, and, based on the measured time and the above-described relationship, uses a method similar to the above-described calculation method for the injection signal to perform cranking. The number of rotations of the shaft 22 is calculated backward.

FIG. 8 shows the Ne signal generation circuit 111 and the G signal generation circuit 11 provided in the distributor 15.
2 and an equivalent circuit diagram showing a specific electrical configuration of the internal combustion engine control circuit 64. In this equivalent circuit diagram, among the circuit components of the fuel injection control unit 81 and the ignition control unit 91 described in FIGS. 6 and 7, only the processing circuits 83 and 94 and the input circuit 93 are shown, and the other circuits are output circuits. Abbreviated as 108. Further, the input circuit 93 is connected to the circuit 11
1, 112, and input circuits 93a, 93, respectively.
b.

The Ne signal generation circuit 111 and the G signal generation circuit 112 have timing rotors 114 and 11 respectively.
5 and pickup coils L4 and L5. One terminal of the pickup coil L4 is connected to the input circuit 9.
3a and 93b, and the other terminal is grounded via a capacitor C1. The ground terminals of the input circuits 93a and 93b are grounded via the diode D2.

The distributor 15 controls the ignition timing of each cylinder by sequentially connecting the connection terminals of the ignition plug 12 and the connection terminals of the ignition coil 14 of each cylinder arranged in a circle, for example. The distributor 15 is provided with a rotating shaft that rotates in conjunction with the movement of the above-mentioned contact. Timing rotor 114, 115
Is fixed to the rotation shaft and rotates in synchronization with the rotation of the rotation shaft.

The timing rotors 114 and 115 are fixed at different heights along the center axis of the rotating shaft. One or more projections are arranged at equal intervals on the outer circumference of the timing rotors 114 and 115. The pickup coils L4, L5 are close to the outer periphery of the timing rotors 114, 115, and correspond to the timing rotors 114, 11 respectively.
5 is installed at the same height position.

Ne signal and G signal generation circuits 111, 1
The Ne signal and the G signal generated at 12 are input to the input circuit 9
After being rectified by 3a and 93b and level-converted, the rectified signal is supplied to the processing circuits 83 and 94 via the auxiliary circuit 117,
Used for the above processing. The auxiliary circuit 117 is a backup circuit for generating an IGt signal in an auxiliary manner when the processing circuits 83 and 94 fail to generate the IGt signal.

When the rotating shaft of the distributor 15 rotates, the interval between the protrusions of the timing rotors 114 and 115 and the pickup coils L4 and L5 changes in conjunction with the rotation, so that the Ne signal of the AC signal is applied to the coils L4 and L5. And G signals are respectively generated. Ne signal and G
The signal corresponds to the rotation of the crankshaft 22 in the following relationship depending on the number of the pickup coils L4 and L5 and the structure of the timing rotors 114 and 115.

FIG. 9 is a sectional view of the distributor 15 showing the timing rotor 114 and the pickup coil L4 of the Ne signal generating circuit 111. On the outer periphery of the timing rotor 114, 24 protrusions are formed at equal intervals, and only one pickup coil L4 is provided. As shown in FIG. 10, the Ne signal output from the Ne signal generating circuit 111 having such a structure
The vibrator 19 vibrates 24 times during one rotation. That is, Ne
The time W1 for one cycle of the signal is determined by the distributor 15
Is equivalent to the time required for the rotation shaft 119 to rotate by 15 °. In a four-cycle gasoline engine, since the crankshaft 22 makes two rotations while the rotation shaft 119 makes one rotation, the time W1 is equal to the time required for the crankshaft 22 to make a 30 ° rotation. The aforementioned starter control circuit 31 determines Ne from the relationship between the time W1 and the number of rotations or the rotation angle of the crankshaft.
The number of revolutions of the crankshaft 22 is estimated using the signal.

FIG. 11 is a sectional view of distributor 15 for explaining a specific structure of G signal generating circuit 112. Referring to FIG. The timing rotor 115 of the circuit 112
It has two projections arranged at positions facing each other across the center of the circle of the rotor, and only one pickup coil L5 is provided. The timing rotor 115 is attached to the rotating shaft 119 such that the timing at which each protrusion comes closest to the pickup coil L5 coincides with the timing at which the piston of the internal combustion engine 3 reaches the top dead center position.

The G signal output from the G signal generating circuit 112 is, as shown in FIG.
5 is a signal in which an AC waveform is generated twice during the time W2 during which the rotation shaft 119 rotates once, and when the signal level reaches the maximum level, the piston in the cylinder 4 reaches the top dead center position. When the internal combustion engine 3 is a four-cycle gasoline engine, one rotation of the rotating shaft 119 of the distributor 15 corresponds to two rotations of the crankshaft 22. Therefore, the interval between the maximum levels of two successive AC waveforms is the crankshaft. 22 of 1
This corresponds to the time required for rotation. The starter control circuit 31 detects the timing when the G signal reaches the maximum level, and calculates the rotation speed of the crankshaft 22 based on the relationship between this timing and the rotation speed described above.

Further, the G signal generation circuit 112 is not limited to the structure shown in FIG. 11, and may have another structure. For example,
As shown in FIG. 13, the timing rotor 115 may have a structure in which the timing rotor 115 has four protrusions at equal intervals and one pickup coil L5. As shown in FIG. 14, a G signal in which an AC waveform is generated four times during the elapse of the time W2 is obtained from the G signal generation circuit 112a having this structure. The time between the waveforms of this signal is
This corresponds to the time during which the crankshaft 22 makes a half turn.

As shown in FIG. 15, a configuration is considered in which the timing rotor 115 has only one projection and two pickup coils L5a and L5b are provided at positions facing each other with the rotation shaft 119 interposed therebetween. Each pickup coil L5a, L5 of the G signal generation circuit 112b having this structure
From FIG. 16B, as shown in FIG. 16, an AC waveform is generated once during the time W2, and a G signal composed of two signals whose generation timings of the AC waveform are shifted from each other by a half cycle is obtained. This G signal coincides with the G signal shown in FIG. 12 when the signals are superimposed. In the electronic device having the G signal generation circuits 112a and 112b having such a structure, the interval between pulses of each G signal is measured and the measured time is measured in the same manner as in the method of estimating the number of revolutions from the G signal shown in FIG. The rotational speed is calculated backward from the correspondence between the above and the rotation of the crankshaft 22 described above.

As described above, the rotational speed of the internal combustion engine 3 can be estimated from various signals input to and output from the internal combustion engine control circuit 64. In addition, since the rotational speed estimation method using these signals can be performed in parallel, the rotational speed is estimated from a plurality of signals, and the average value of the rotational speed estimated by each method is obtained. Alternatively, the average value may be used as the value of the number of revolutions used in the subsequent processing. Further, the rotation speed estimation method is not limited to the starter control circuit 31 and may be implemented in the internal combustion engine control circuit 64. Further, the present invention may be implemented in various control circuits that use the rotation speed as a control parameter.

[0140]

As described above, according to the present invention, the remote starting device for a vehicular internal combustion engine can be used when the start of the internal combustion engine is instructed by a remote command and the remaining fuel amount becomes very small.
Automatically stopping at least one of starting the internal combustion engine and maintaining the idle state. As a result, it is possible to prevent the subsequent traveling from being impossible due to excessive consumption of fuel during the warm-up operation.

Further, according to the present invention, a remote starting device for an internal combustion engine for a vehicle includes a failure of a measuring means for measuring a physical quantity representing a current driving state of the internal combustion engine, an abnormal rise in exhaust gas temperature and cooling water temperature, and a lubricating oil. When at least one of the abnormal lowering of the hydraulic pressure is detected, at least one of the starting operation and the maintaining operation of the internal combustion engine is automatically stopped. Therefore, for example, during a warm-up operation, a fail-safe operation for preventing an abnormal operation of the internal combustion engine and a device associated with the engine can be performed from various viewpoints.

Furthermore, according to the present invention, a remote starting device for a vehicular internal combustion engine provides an internal combustion engine in which an increase in the rotational speed of the internal combustion engine is estimated from a change in the opening degree of a throttle valve or a control signal of the internal combustion engine. When the detection is performed based on the engine speed, at least one of the starting operation and the maintaining operation of the internal combustion engine is automatically stopped. Therefore, for example, during a warm-up operation, a fail-safe operation for preventing an abnormal operation of the internal combustion engine can be performed.

Further, according to the present invention, the remote starting device for the internal combustion engine for a vehicle stops at least one of the starting operation and the maintaining operation of the internal combustion engine when detecting the start of running of the vehicle. Thus, when the brake is released by mistake, the internal combustion engine can be automatically stopped immediately and the traveling of the vehicle can be stopped.

Further, according to the present invention, the remote starter for an internal combustion engine for a vehicle, when the concentration of exhaust gas stored around the vehicle is equal to or higher than a predetermined concentration, starts and maintains the internal combustion engine. Stop at least one.
As a result, it is possible to prevent a person near the vehicle and the driver from being affected by the exhaust gas for the warm-up operation.

Furthermore, according to the present invention, the remote starting device for an internal combustion engine for a vehicle detects an object that has entered the vehicle interior during a warm-up operation using, for example, a radar, an ultrasonic sensor, and a vibration sensor, and detects the object. When there is a burned object, at least one of the start operation and the maintenance operation of the internal combustion engine is stopped. This can prevent the vehicle from being stolen due to the warm-up operation being performed.

Further, according to the present invention, the remote starting device for the internal combustion engine easily determines the failure of the stopping device of the device from the supply timing of the power supply to the starting device and the maintaining device and the operation timing of the internal combustion engine. be able to.

Further, according to the present invention, when the stopping means fails, the starting means and the maintaining means are forcibly stopped using the switching means. Further, the failure of the stop means and the switching means is determined in advance when the internal combustion engine is stopped, and if at least one of the failures has failed, the warm-up operation is stopped. This makes it possible to prevent the so-called fail-safe operation of the internal combustion engine from becoming impossible in advance.

Further, according to the present invention, the prohibiting means is realized by a device having a structure different from that of the stopping means itself. As a result, the possibility that the stopping means and the prohibiting means fail at the same time can be reduced.

Further, according to the present invention, the internal combustion engine rotational speed detecting device detects the rotational speed of the internal combustion engine from a control signal generated accompanying the rotation of the internal combustion engine and used for controlling the operation of the internal combustion engine. Infer. As a result, the error in estimating the rotational speed can be reduced as compared with the prior art device, and the mounting becomes easier.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of an electronic device 1 including a remote starting device for an internal combustion engine 3 according to an embodiment of the present invention.

FIG. 2 is an equivalent circuit diagram showing a specific electrical configuration of a switching circuit 46 of the electronic device 1.

FIG. 3 is an equivalent circuit diagram for describing a specific electrical configuration of a switching circuit 76 which is another example of the switching circuit 46.

FIG. 4 is a flowchart illustrating a remote start operation of the internal combustion engine 3 in the starter control circuit 31 of the electronic device 1 of FIG.

FIG. 5 is an equivalent circuit diagram for explaining a specific electrical configuration of a switching circuit 78 included in an electronic device according to another example of the present invention.

6 shows a fuel injection control unit 81 in an internal combustion engine control circuit 64 of the electronic device 1 of FIG. 1, and a fuel injection valve 8 of the internal combustion engine 3
FIG. 3 is an equivalent circuit diagram showing a specific electrical configuration of FIG.

FIG. 7 is an equivalent circuit diagram showing a specific electrical configuration of an ignition control unit 91 and an igniter 13 of the internal combustion engine control circuit 64 of the electronic device 1.

FIG. 8 shows Ne in the distributor 15 of the electronic device 1.
FIG. 2 is an equivalent circuit diagram showing a specific electrical configuration of a signal generation circuit 111, a G signal generation circuit 112, and an internal combustion engine control circuit 64.

FIG. 9 is a cross-sectional view of the distributor 15 showing a specific structure of the Ne signal generation circuit 111.

FIG. 10 is a waveform diagram of the Ne signal output from the Ne signal generation circuit 111 of FIG. 9;

11 is a cross-sectional view of a distributor 15 showing a specific structure of a G signal generation circuit 112. FIG.

12 is a waveform diagram of a G signal output from the G signal generation circuit 112 in FIG.

FIG. 13 is a cross-sectional view of a distributor 15 for explaining a G signal generation circuit 112a having another structure.

14 is a waveform diagram of a G signal output from the G signal generation circuit 112a of FIG.

FIG. 15 is a cross-sectional view of the distributor 15 for explaining another structure of the G signal generation circuit 112b having another structure.

FIG. 16 is a waveform diagram showing a G signal output from the G signal generation circuit 112b of FIG.

[Explanation of symbols]

 Reference Signs List 1 electronic device 3 internal combustion engine 7 throttle valve 8 fuel injection valve 9 accelerator pedal 10 fuel tank 12 ignition plug 13 igniter 15 distributor 19 cooling device 20 lubrication device 26 starter motor 31 starter control circuit 34 transmitter 38 transmission circuit 39 reception circuit 45, 46, 47; 76, 78 Switching circuit 52 Valve opening sensor 54 Fuel remaining sensor 55 Exhaust temperature sensor 56 Cooling water temperature sensor 57 Oil pressure sensor 59 Vehicle speed sensor 60 Exhaust gas concentration sensor 61 Object intrusion sensor 62 Vibration sensor 64 Internal combustion engine control circuit 71 Auxiliary relay circuit 72 Control relay circuit 77 Field effect transistor 79 Fuse 111 Ne signal generation circuit 112 G signal generation circuit

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code FI F02D 17/04 F02D 17/04 VC D G B 29/02 29/02 H K 41/22 301 41/22 301Z 45/00 345 45/00 345L F02N 11/10 F02N 11/10 E 15/00 15/00 F

Claims (17)

[Claims] A starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started; a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means; a starting means and a maintaining means; Remote operation means for instructing the start of the internal combustion engine from outside the vehicle to operate, and fuel remaining amount measurement means for measuring at least the fuel remaining amount in the fuel tank of the internal combustion engine in response to an instruction from the remote instruction means And control means for generating a stop signal for stopping at least one of the starting means and the maintenance means when the remaining fuel quantity measured by the fuel remaining quantity measurement means is less than a predetermined amount; and a stop signal from the control means. Stopping means for stopping at least one of the starting means and the maintaining means in response to the starting means. 2. A starting device for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining device for maintaining an idle state of the internal combustion engine started by the starting device, and a starting device and a maintaining device. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle for operation; andmeasurement means for measuring a physical quantity which fluctuates at least in accordance with the operation state of the internal combustion engine in response to an instruction from the remote instruction means. Control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the measurement means has failed, determining whether or not the measurement means has failed; and starting means in response to the stop signal from the control means. And a stopping means for stopping at least one of the maintenance means. 3. A starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and a maintaining means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle to operate, and exhaust temperature measurement means for measuring at least the exhaust temperature of exhaust gas discharged from the internal combustion engine in response to an instruction from the remote instruction means When the exhaust gas temperature measured by the exhaust gas temperature measuring device is equal to or higher than a predetermined temperature, the control device generates a stop signal for stopping at least one of the starting device and the maintaining device, and responds to the stop signal from the control device. And a stop means for stopping at least one of the start means and the maintenance means. 4. Starter means for starting an internal combustion engine which is installed in a vehicle and which can be remotely started, maintenance means for maintaining an idle state of the internal combustion engine started by the start means, and start means and maintenance means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle to operate, and oil pressure measurement means for measuring at least the oil pressure of the lubricating oil in the lubricating device of the internal combustion engine in response to the instruction from the remote instruction means A control unit for generating a stop signal for stopping at least one of the starting unit and the maintaining unit when the oil pressure measured by the oil pressure measuring unit is less than a predetermined pressure; and starting in response to the stop signal from the control unit. Stopping means for stopping at least one of the means and the maintaining means. 5. Starter means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, maintenance means for maintaining an idle state of the internal combustion engine started by the start means, and start means and maintenance means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle to operate the cooling water temperature measurement for measuring at least the temperature of the cooling water in the cooling device of the internal combustion engine in response to the instruction from the remote instruction means Means, a control means for generating a stop signal for stopping at least one of the starting means and the maintaining means when the water temperature measured by the cooling water temperature measuring means is equal to or higher than a predetermined temperature, and a response to a stop signal from the control means. And a stopping means for stopping at least one of the starting means and the maintaining means. 6. Starter means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, maintenance means for maintaining an idle state of the internal combustion engine started by the start means, and start means and maintenance means. Remote operation means for instructing start of the internal combustion engine from outside the vehicle, and opening of a throttle valve for adjusting at least an intake amount of air taken into the internal combustion engine in response to an instruction from the remote instruction means for operation. When the valve opening measured by the valve opening measuring means exceeds the minimum valve opening corresponding to the idle state of the internal combustion engine, at least one of the starting means and the maintaining means is operated. Control means for generating a stop signal for stopping, and stopping means for stopping at least one of the starting means and the maintaining means in response to the stop signal from the control means. A remote starting device for an internal combustion engine for a vehicle, comprising: 7. Starter means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, maintenance means for maintaining an idle state of the internal combustion engine started by the start means, and start means and maintenance means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle, and at least a signal generated accompanying the rotation of the internal combustion engine in response to the instruction from the remote instruction means to operate the crankshaft of the internal combustion engine. A rotational speed estimating means for estimating the rotational speed, and a stop for stopping at least one of the starting means and the maintaining means when the rotational speed estimated by the rotational speed estimating means exceeds a minimum rotational speed corresponding to an idle state of the internal combustion engine. Control means for generating a signal; and stop means for stopping at least one of the start means and the maintenance means in response to a stop signal from the control means. A remote starting device for an internal combustion engine for a vehicle. 8. The injection signal given from the maintenance means to the internal combustion engine to control the injection timing of a fuel injection valve for supplying fuel to the internal combustion engine, the signal being generated accompanying the rotation of the internal combustion engine. An ignition signal given to the internal combustion engine from the maintenance means to control the ignition timing of an ignition plug for burning the air-fuel mixture in the cylinder of the internal combustion engine; Immediately after the ignition plug ignites the air-fuel mixture, a confirmation signal given from the internal combustion engine to the maintaining means, and the rotation of the rotating shaft of the ignition timing control means for controlling the ignition timing of the ignition plug, determine A crank angle signal provided from the internal combustion engine to the maintaining means for detecting the rotation angle of the crankshaft of the engine, and ignition of the air-fuel mixture in the cylinder of the internal combustion engine In the ignition timing control means for controlling the timing, the crank provided from the internal combustion engine to the maintenance means to detect the position of the top dead center of the piston in the cylinder from the rotation of the rotating shaft rotating in synchronization with the crankshaft. The remote starting device for an internal combustion engine for a vehicle according to claim 7, wherein the signal is at least one of an angle reference position signal. 9. A starting means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and a maintaining means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle for operation, a vehicle speed measurement means for measuring at least a running speed of the vehicle in response to an instruction from the remote instruction means, and a vehicle speed measurement means Control means for generating a stop signal for stopping at least one of the start means and the maintenance means when the running speed exceeds the stop state of the vehicle; and starting means and maintenance means in response to the stop signal from the control means. Stopping means for stopping at least one of the above. 10. Starter means mounted on a vehicle body for starting an internal combustion engine which can be remotely started, maintenance means for maintaining an idle state of the internal combustion engine started by the start means, and start means and maintenance means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle, and at least an exhaust gas discharged from the internal combustion engine and stored in a predetermined space in response to the instruction from the remote instruction means. Exhaust gas concentration measuring means for measuring the concentration in the space; and generating a stop signal for stopping at least one of the starting means and the maintaining means when the concentration measured by the exhaust gas concentration measuring means is equal to or higher than a predetermined concentration. And a stopping means for stopping at least one of the starting means and the maintaining means in response to a stop signal from the controlling means. A remote starting device for an internal combustion engine for a vehicle, comprising: 11. A starting means mounted on a vehicle body for starting an internal combustion engine capable of being remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, and a starting means and a maintaining means. Remote operation means for instructing the start of the internal combustion engine from outside the vehicle in order to operate; object detection means for detecting an object that has entered the interior of the vehicle in response to an instruction from the remote operation means; object detection means When an intruding object is detected by
Control means for generating a stop signal for stopping at least one of the start means and the maintenance means; and stop means for stopping at least one of the start means and the maintenance means in response to a stop signal from the control means. A remote starter for a vehicle internal combustion engine. 12. The object detecting means is one of a radar and an ultrasonic sensor for detecting an object in a vehicle cabin, and a vibration sensor for detecting a vibration applied to a vehicle. The remote starting device for a vehicle internal combustion engine according to claim 11, wherein 13. A starting means for starting an internal combustion engine which is mounted on a vehicle body and which can be remotely started, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and a maintaining means. In order to operate, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, a physical quantity which fluctuates in accordance with an operation state of the internal combustion engine is measured and measured. When the physical quantity represents a state that is incompatible with the continuation of operation of the internal combustion engine,
Control means for generating a stop signal for stopping at least one of the start means and the maintenance means; and a power supply for shutting off power supply to the at least one of the start means and the maintenance means in response to the stop signal from the control means. Cut-off means, supply detection means for detecting the presence or absence of power supply to the start means and the maintenance means, and supply detection that power is supplied to the start means and the maintenance means when power is cut off by the power supply cut-off means The power supply cutoff means is determined to be faulty when the power supply cutoff means is detected by the power supply cutoff means or when it is detected that power to the starting means and the maintenance means is cut off when power is supplied by the power supply cutoff means A remote starter for an internal combustion engine for a vehicle, comprising: 14. The power supply cutoff means reversibly permits or prohibits power supply to the starting means and the maintenance means, and when the failure determination means determines that the power supply cutoff means has failed, the power supply cutoff means Switching means for forcibly prohibiting supply; and inspection means for determining whether or not the power supply cutoff means and the switching means have a failure when the starting means and the maintenance means are stopped. The power supply to the starting means and the maintaining means is interrupted by the power supply interrupting means, and the presence or absence of power supply to the starting means and the maintaining means is detected by the supply detecting means. When the power supply cut-off means is determined to have failed, the switching means The power supply to the starting means and the maintenance means is supplied by the supply / cutoff means, and the presence or absence of power supply to the starting means and the maintenance means is detected by the supply detection means. Inspection means for determining that the switching means and the power supply cutoff means have failed, and stopping the operation of the starting means and the maintenance means when the inspection means determines that at least one of the switching means and the power supply cutoff means has failed. 14. The remote starting device for an internal combustion engine for a vehicle according to claim 13, wherein: 15. A starting means mounted on a vehicle body for starting an internal combustion engine capable of remotely starting, a maintaining means for maintaining an idle state of the internal combustion engine started by the starting means, a starting means and a maintaining means. In order to operate, a remote instruction means for instructing the start of the internal combustion engine from outside the vehicle, and in response to an instruction from the remote instruction means, a physical quantity which fluctuates in accordance with an operation state of the internal combustion engine is measured and measured. When the physical quantity represents a state that is incompatible with the continuation of operation of the internal combustion engine,
Control means for generating a stop signal for stopping at least one of the start means and the maintenance means; and electric power for interrupting supply of power to one of the start means and the maintenance means in response to the stop signal from the control means Supply cutoff means; rotation detection means for detecting the presence or absence of rotation of the internal combustion engine; power supply cutoff means when rotation of the internal combustion engine is detected by the rotation detection means when power is cut off by the power supply cutoff means And a failure determining means for determining that the vehicle has failed. 16. The power supply cutoff means further comprises a prohibition means for forcibly prohibiting power supply to the starting means and the maintenance means when the failure determination means determines that the power supply cutoff means has failed. The remote starting device for an internal combustion engine for a vehicle according to claim 13, wherein the remote starting device includes: 17. A rotation speed detecting device for detecting a pulse signal generated accompanying rotation of an internal combustion engine and estimating a rotation speed of the internal combustion engine from a pulse interval of the pulse signal, wherein the pulse signal comprises: An injection signal for controlling an injection timing of a fuel injection valve for supplying fuel into the engine; an ignition signal for controlling an ignition timing of a spark plug for burning an air-fuel mixture in a cylinder of the internal combustion engine; A confirmation signal output immediately after ignition of the air-fuel mixture by the spark plug to confirm combustion of the air-fuel mixture in the cylinder of the engine; from a rotation of a rotating shaft of ignition timing control means for controlling ignition timing of the ignition plug; A crank angle signal for detecting a rotation angle of a crankshaft of the internal combustion engine, and an ignition timing control means for controlling an ignition timing of an air-fuel mixture in a cylinder of the internal combustion engine. A rotational speed of the internal combustion engine, which is one of crank angle reference position signals for detecting a top dead center position of a piston in a cylinder from rotation of a rotating shaft that rotates in synchronization with a rank shaft. Detection device.