JP2015209826A - Vehicle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make available a smart keyless entry high in power consumption at a time of transmitting a radio wave in a vehicle that does not mount therein a battery.SOLUTION: An engine control unit 4 (internal combustion engine controller) executes an ignition control and a fuel injection control to control an engine speed to be lower than a preset engine speed at a level at which a vehicle can travel after the engine is started in response to a driver's operation until an authentication result indicating successful authentication of a portable machine 20 held by a driver is received from a smart unit 15 (vehicle anti-theft device), and executes a limitation control to stop the engine to prohibit the traveling of the vehicle if detecting a driver's operation to transition to travel during the execution of the controls. The limitation control can suppress power consumption relating to ignition and injection and ensure power required for communication for the authentication.

Description

    The present invention relates to a vehicle system, and more particularly to a vehicle system including an anti-theft system propelled by an internal combustion engine, such as a motorcycle, and more particularly, a vehicle system including an anti-theft system without a battery. It is about.

  When the authentication code registered in the ignition key or mobile terminal is transmitted to the authentication device attached to the vehicle body as a conventional vehicle anti-theft device, and matches the authentication code registered in the authentication device in advance Some have a configuration of permitting engine start.

  Patent Document 1 discloses a vehicle antitheft device using a transponder type immobilizer.

  In Patent Document 1, when the motorcycle is kick-started, the engine start control is once permitted, and when the voltage of the power line exceeds a predetermined value due to power generation obtained by the kick, the authentication device starts the authentication operation, and the authentication code If the match is established, the start control is continued. If the authentication code does not match, the start control is stopped. If the authentication code matches, the engine can be started with a single kick operation. An engine starter with an antitheft function has been proposed.

Japanese Patent No. 4136922

  Patent Document 1 considers a battery in a state of advanced discharge, but there is a need for a system that can be operated without a battery, particularly in small motorcycles and small outboard motors.

  The battery is a heavy object, for vehicle weight reduction, for avoiding the increase in vehicle cost due to the placement of the battery, and for avoiding running costs such as when the battery deteriorates and needs to be replaced, for various purposes such as Small motorcycles and small outboard motors with an electronically controlled fuel injection system that can operate without a battery are already on the market.

  In addition, the vehicle antitheft device of Patent Document 1 uses a transponder type immobilizer. In general, this method communicates an authentication code in a state where an authentication device and an ignition key or a portable terminal are close to each other. And the communicable distance is short.

  However, in order to avoid troublesome operations such as the operation of inserting an ignition key and the operation of bringing the mobile terminal close to the authentication device, the distance is within the vehicle range (about 1 meter) without bringing the mobile device close to the authentication device. In recent years, smart keyless entry with communication has been adopted in motorcycles. In the case of smart keyless entry, the driver puts the ignition key into the key cylinder or brings the mobile terminal close to the authentication device, especially when wearing gloves. The authentication code can be communicated with the terminal in the clothes pocket.

  However, the smart keyless entry has an advantage in that the communication distance is long, but there is a problem that power consumption is large when code is transmitted from the authentication device to the portable terminal. When authentication with a portable device is started, a code is first transmitted from the authentication device to the portable terminal. At that time, the voltage of the power supply line is not yet stable, and the amount of power generated by the generator is not consumed. Since there is no room, if a code is transmitted during such engine startup, the voltage of the power supply line is lowered, and both the engine control device and the authentication device are reset and the engine startup fails.

  Further, in a vehicle without a battery, the voltage of the power supply line at the time of starting the engine is likely to fluctuate, and there is a problem that a communication error tends to occur if communication is performed in a state where the voltage fluctuation is large.

  In addition, although the power supply line voltage is more stable after engine start than when the engine is started, the power supply line voltage decreases when the operation timing of an actuator that consumes a large current, such as an ignition coil, coincides with the code transmission timing. There is also a possibility that the engine will fail because the microcomputer is reset together with the authentication device.

  The present invention has been made to solve such a problem, and can apply a smart keyless entry that consumes a large amount of power when transmitting an authentication code to a vehicle that is not equipped with a battery, although it has a long communication distance. An object is to obtain a vehicle system.

  The present invention is a vehicle system mounted on a vehicle that is not equipped with a battery, and an internal combustion engine control device that performs ignition control and fuel injection control for an engine provided in the vehicle, and input that is input from outside by wireless communication The authentication code is compared with a registered authentication code registered in advance. If the authentication codes match, authentication is successful. Otherwise, authentication processing is performed and authentication results. A smart keyless type vehicle antitheft device for transmitting to the internal combustion engine control device, the internal combustion engine control device from the vehicle antitheft device after the engine is started by a driver's operation. Until the authentication result of successful authentication is received, the rotation speed of the engine is limited to less than a preset engine rotation speed at which the vehicle can travel. The ignition control and the fuel injection control are executed, and during the execution, when the driving transition operation by the driver is detected, the engine is stopped and the vehicle is prohibited from running. It is a vehicle system.

  In this invention, after the engine is started by the driver's operation, the engine speed is limited to less than the engine speed at which the vehicle can run until the authentication success result is received from the vehicle antitheft device. However, when the driving transition operation by the driver is detected, the engine is stopped and the restriction control for prohibiting the vehicle is performed. Therefore, until the authentication process of the smart unit 15 is completed, Since it is possible to reduce the power required for the operation of the ignition coil and the injector, smart keyless entry that has a long communication distance but consumes a large amount of power when transmitting an authentication code can be applied to a vehicle not equipped with a battery. It becomes possible.

It is a block diagram which shows the vehicle system of Embodiment 1 of this invention. It is a block diagram which shows the vehicle system of Embodiment 2 of this invention. It is a timing chart of operation | movement description of Embodiment 2 of this invention. It is a block diagram which shows the vehicle system of Embodiment 3 of this invention.

  Hereinafter, a vehicle system according to an embodiment of the present invention will be described with reference to the drawings. The vehicle system according to the present invention assumes a vehicle system mounted on a vehicle not equipped with a battery.

Embodiment 1 FIG.
Embodiment 1 of the present invention is a vehicle system including a vehicle antitheft device and an internal combustion engine control device. FIG. 1 is a diagram showing a configuration of a vehicle system according to the first embodiment. The vehicle shown in FIG. 1 is assumed to be a small motorcycle, for example. In FIG. 1, the smart unit 15 constitutes a vehicle antitheft device, and the engine control unit 4 constitutes an internal combustion engine control device.

  In FIG. 1, an alternator 1 is an alternator connected to a crankshaft of an engine (not shown). When a driver kicks a kick lever (not shown) of a small motorcycle (not shown), a crankshaft (not shown) rotates, and a rotor in the AC generator 1 coupled to the crankshaft rotates to generate power.

  A rectifier regulator 2 is connected to the AC generator 1. The rectifier regulator 2 performs rectification and voltage adjustment for the power generation of the AC generator 1.

  A capacitor 3 is connected in parallel between the rectifier regulator 2 and the engine control unit 4. The capacitor 3 is a capacitor installed for smoothing the voltage of the power supply line.

The engine control unit 4 constitutes an internal combustion engine control device that performs various controls such as ignition control and fuel injection control for an engine provided in the vehicle. In the engine control unit 4, a power supply circuit 5 and a microcomputer 6 are provided.
The power supply circuit 5 generates a 5V power supply for an internal control circuit in the engine control unit 4 using a power supply that varies from about 12 to 14V supplied from the rectifier regulator 2.
The microcomputer 6 operates with power supplied from the power supply circuit 5. The microcomputer 6 includes sensor signals from various sensors such as a crank angle sensor 10, a throttle position sensor 11 (hereinafter referred to as a throttle sensor 11), an intake pipe pressure sensor (not shown), and an exhaust pipe oxygen concentration sensor (not shown), and Switch signals from various switches such as the neutral switch 12, the side stand switch 13, and a clutch switch (not shown) are input via an interface (I / F) provided in the engine control unit 4. The microcomputer 6 calculates an ignition timing, a fuel injection amount, a fuel injection timing, and an ISC solenoid opening based on these input sensor signals and switch signals, and outputs a drive circuit provided in the engine control unit 4. Thus, the ignition coil 7, the injector 8, and the ISC solenoid 9 are driven and controlled.

Here, the crank angle sensor 10 is a sensor for measuring the crank angle of the engine.
The throttle sensor 11 is a sensor that measures an opening degree of a throttle valve (hereinafter referred to as a throttle opening degree) provided in an intake pipe of a vehicle.
The neutral switch 12 is a switch that is turned on when the gear of the transmission of the vehicle is in a neutral state and turned off when the gear is not in a neutral state.
The side stand switch 13 is a switch that is turned on when the vehicle side stand is not stored and turned off when the vehicle is stored. A vehicle side stand is a support member that is mounted on the left side (or right side) of a motorcycle body and supports the vehicle body in an inclined state. When the vehicle is stopped, the driver does not store the side stand, but supports the vehicle body with the side stand and stops the vehicle.However, when driving the vehicle, the driver must store the side stand before starting driving. , So as not to interfere with driving.

The smart unit 15 compares an input authentication code input from the outside (the portable device 20) by wireless communication with a registration authentication code registered in advance in the inside, and if the authentication codes match, the smart unit 15 is successful. The smart keyless type vehicle antitheft device that performs authentication processing by determining other cases as authentication failure and transmits the authentication result to the engine control unit 4 is configured. The smart unit 15 is connected to the rectifier regulator 2 and is also connected to the engine control unit 4 via the communication line 14. In the smart unit 15, a power supply circuit 16, a microcomputer 17, a transmission circuit 18, a reception circuit 19, and a storage circuit 26 are provided.
Similarly to the power supply circuit 5 of the engine control unit 4, the power supply circuit 16 uses a power supply varying from about 12 to 14 V supplied from the rectifier regulator 2, and supplies a 5 V power supply for the internal control circuit in the smart unit 15. Generate.
The microcomputer 17 is operated by the 5V power supply, performs the authentication process, and transmits an authentication result to the engine control unit 4.
The transmission circuit 18 and the reception circuit 19 perform wireless communication with the portable device 20 carried by the driver of the vehicle for the authentication process.
An authentication code is registered in the memory circuit 26 in advance. Hereinafter, the authentication code registered in the storage circuit 26 will be referred to as “registered authentication code”.

The portable device 20 is a portable device carried by the driver, and is given a unique authentication code and registered in advance. The portable device 20 is a portable device that supports a smart keyless type. In the portable device 20, a reception circuit 21, a transmission circuit 22, a microcomputer 23, a battery 24, and a storage circuit 25 are provided.
The reception circuit 21 and the transmission circuit 22 perform wireless communication with the smart unit 15 for the authentication process.
The microcomputer 23 operates using the battery 24 as a power source.
The battery 24 stores electric power by charging.
In the memory circuit 25, an authentication code is registered. Hereinafter, an authentication code transmitted from the portable device 20 to the smart unit 15 by wireless communication and input to the smart unit 15 will be referred to as an “input authentication code”.

Next, the operation of the vehicle system according to the present embodiment will be described.
When a driver kicks a kick lever (not shown) of a small two-wheeled vehicle (not shown) as a vehicle, the crankshaft of an engine (not shown) rotates, and the AC generator 1 coupled to the crankshaft starts power generation. The rectifier regulator 2 connected to the AC generator 1 performs rectification and voltage adjustment for the power generation of the AC generator 1, and further smoothes the voltage by the capacitor 3, which is used as the power line voltage (capacitor 3 voltage). , And supplied to the engine control unit 4 and the smart unit 15.

  The power supply circuit 5 in the engine control unit 4 and the power supply circuit 16 in the smart unit 15 generate a 5V power supply that becomes an operation voltage of the control circuit in each unit from a power supply line voltage that varies in the range of about 12V to 14. After completing the 5V power generation, the microcomputer 6 in the engine control unit 4 and the microcomputer 17 in the smart unit 15 start to operate.

  The microcomputer 6 in the engine control unit 4 calculates the crank angle and the engine rotation speed based on the sensor signal from the crank angle sensor 10. The microcomputer 6 in the engine control unit 4 is based on a sensor signal from a throttle sensor 11 attached to a throttle valve shaft (not shown) or a sensor signal from an intake pipe pressure sensor (not shown) attached to an intake pipe (not shown). Calculate the engine load.

  The microcomputer 6 in the engine control unit 4 calculates an ignition timing, a fuel injection amount (injector drive time), and a fuel injection timing based on the engine rotational speed and the engine load, and an appropriate timing according to the crank angle. Thus, the ignition coil 7 and the injector 8 are driven and controlled. As a result, fuel injection → inhalation of the air-fuel mixture into the engine cylinder → compression → ignition → explosion is sequentially executed, and the piston in the engine cylinder is pushed down by the explosion, and this is converted into rotation of the crankshaft.

  As described above, in the present embodiment, the engine is started even if there is no battery due to the occurrence of the explosion while the crankshaft is rotated by the kick of the kick lever (not shown) by the driver. Is possible.

  In addition, the engine control unit 4 drives an ISC solenoid 9 that adjusts the valve opening degree of a bypass air passage (not shown) provided in parallel with a throttle valve (not shown) to control the increase in idle engine rotation speed after startup and idle rotation. Speed stabilization control is performed.

  As described above, the engine control unit 4 is not particularly prohibited from starting the engine, and can start the engine. After the engine start is completed, the microcomputer 6 in the engine control unit 4 determines whether or not the engine rotation speed has been stabilized. If it is determined that the engine has been stabilized, the microcomputer 6 in the smart unit 15 is connected via the communication line 14. An authentication start request (authentication start instruction) is transmitted to the microcomputer 17. As a method for determining whether or not the engine rotational speed has stabilized, for example, a stabilization threshold value indicating stabilization is set in advance, and the engine rotational speed is increased when the engine rotational speed becomes equal to or higher than the stabilization threshold value. Is determined to have stabilized. Here, it is desirable that the stabilization threshold is set to a value that is significantly lower than a travelable threshold described later. Alternatively, the fluctuation range of the engine rotation speed may be detected, and it may be determined that the engine rotation speed has been stabilized when the fluctuation range falls within a preset range width. The stabilization of the engine rotation speed means that the power supply voltage from the AC generator 1 is stabilized at the same time.

  On the other hand, the microcomputer 17 in the smart unit 15 starts to operate after the generation of the 5V power supply described above, but first, only the authentication code is read from the storage circuit 26 and the microcomputer 6 in the engine control unit 4 reads the above-mentioned. The standby state is continued until an authentication start request is received. After receiving the authentication start request, the smart unit 15 wirelessly transmits a question signal to the outside via the transmission circuit 18. It is assumed that the question signal includes unique data assigned to each smart unit 15 (hereinafter referred to as unit unique data).

  At this time, if the driver holding the portable device 20 is within the transmission range of the smart unit 15, the reception circuit 21 in the portable device 20 receives the interrogation signal, and the microcomputer 23 in the portable device 20 It is determined whether or not the unit unique data matches the registered unique data registered in the storage circuit 25 in advance. If they match, the portable device 20 wirelessly transmits data including the authentication code (input authentication code) in the storage circuit 25 to the smart unit 15 via the transmission circuit 22 as a response signal. On the other hand, if the unit unique data does not match the registered unique data, nothing is transmitted.

  The receiving circuit 19 in the smart unit 15 receives the response signal, and the microcomputer 17 determines that the authentication code (input authentication code) included in the response signal from the portable device 20 is the authentication code (registered authentication code) in the storage circuit 26. ). After the determination, the microcomputer 17 transmits an authentication result indicating either an authentication code match (authentication success) or an authentication code mismatch (authentication failure) to the microcomputer 6 in the engine control unit 4 via the communication line 14. .

  If the response signal from the portable device 20 is not returned, such as when communication of the question signal fails, the smart unit 15 repeatedly transmits the question signal at a preset cycle until the response signal is returned. However, in the case of failure for the preset number of times, the authentication result of authentication code mismatch (authentication failure) is transmitted to the microcomputer 6 in the engine control unit 4.

  As described above, the microcomputer 6 in the engine control unit 4 allows the engine to be in idle operation or idle after the engine is started by the driver's kick operation until the authentication result of successful authentication is received from the smart unit 15. Restriction control is performed such that the driving in the extremely low rotation speed range lower than the rotation speed can be continued and the vehicle is not allowed to travel. The restriction control refers to ignition / fuel injection / bypass air control that restricts the engine speed to less than a preset engine speed (travelable threshold) at which the vehicle can travel. When the engine speed exceeds a preset engine rotational speed (travelable threshold) or when a travel transition operation by the driver is detected, the engine is stopped and travel of the vehicle is prohibited. Specifically, a state in which the following restrictions (1) to (4) are provided is referred to as restriction control. However, it is not necessary to perform all of (1) to (4), and only (1) may be used. Moreover, as a driving | running | working transfer operation of a driver | operator, the case of following (2)-(4) is mentioned as an example.

(1) Engine speed limit: The microcomputer 6 controls ignition, fuel injection, and bypass air to limit the engine speed to less than a preset engine speed (travelable threshold). When the preset rotation speed (travelable threshold) is exceeded, at least one of ignition control and injection control is stopped.
(2) When the gear is lost in the neutral state: The microcomputer 6 monitors the state of the neutral switch 12 (that is, monitors whether or not the transmission of the vehicle is in the neutral state) and enters the OFF state. In the case (that is, when the transmission of the vehicle is no longer in the neutral state), it is detected that the driver has performed a travel transition operation, and at least one of ignition control and fuel injection control is stopped, and the engine is stopped.
(3) When the throttle is opened: The microcomputer 6 monitors the sensor signal from the throttle sensor 11 and confirms that the throttle opening of the vehicle is greater than or equal to a preset opening value based on the sensor signal. If detected, it is detected that there has been a travel transition operation by the driver, at least one of ignition control and fuel injection control is stopped, and the engine is stopped.
(4) When the side stand is stored: The microcomputer 6 monitors the state of the side stand switch 13 (that is, monitors whether or not the side stand of the vehicle is in the stored state). When the side stand of the vehicle is in the retracted state), it is detected that there has been a travel transition operation by the driver, at least one of ignition control and fuel injection control is stopped, and the engine is stopped.

  When the authentication between the smart unit 15 and the portable device 20 is correctly completed and the authentication code match reply is received from the smart unit 15, the microcomputer 6 in the engine control unit 4 performs the above (1) to (4). Remove the restrictions. That is, the vehicle can run.

  When an authentication result is not received from the smart unit 15 even after a preset time has elapsed after transmitting the authentication start request, or when an authentication failure authentication result is received from the smart unit 15 Stops ignition control and fuel injection control and stops the engine.

  In addition, what is necessary is just to implement the restrictions of said (1)-(4) according to the kind of vehicle. (1) is intended to be applied to vehicles equipped with a centrifugal clutch, and the vehicle cannot run if it is prohibited to have an engine speed higher than the engine speed (approximately 3000 r / min) to which the centrifugal clutch is coupled. . In other words, when the engine speed exceeds about 2500 r / min, this can be realized by stopping the ignition control and the injection control. Moreover, (4) is applicable only to a vehicle equipped with a side stand.

  Although the present embodiment assumes a small two-wheeled vehicle, the same applies to recoil start of a small outboard motor. However, with regard to the restrictions (1) to (4), the restriction by (2) is mainly effective, but (1) and (3) can also be implemented.

  In addition, a unique code may be stored in a memory circuit (not shown) in the engine control unit 4 so that the unique code matches with the smart unit 15. Needless to say, it improves the performance.

  It goes without saying that the anti-theft performance is further improved if a small motorcycle is provided with a mechanism for electrically locking and unlocking the steering wheel and the wheel so that the smart unit is unlocked when the authentication code matches.

  When electronic control devices such as meters, steering locks, and wheel locks are equipped with a microcomputer, these electronic control devices are also equipped with a memory circuit to store unique codes and match the unique codes with the smart unit. Needless to say, the anti-theft performance will be further improved.

  If no authentication code match reply is received from the smart unit 15 even after a predetermined time has elapsed after the authentication start request is sent, or if an authentication code mismatch reply is received from the smart unit 15, ignition / injection is stopped. That is, you may sound a buzzer before stopping an engine.

  In the present embodiment, the authentication operation is executed in a state where the engine rotation after the start of the engine by kick start is stable at an idle (about 2000 r / min), and thus the voltage of the power supply line is stable. Therefore, even a smart keyless entry where the power consumption of the transmission circuit 18 is large can be applied to a vehicle without a battery.

  Further, since the authentication operation is not performed during start-up where the voltage fluctuation of the power supply line is large, there is no possibility of communication failure due to power supply fluctuation.

  In addition, although the authentication operation after the start is completed and the engine speed is stabilized, if the portable device 20 is within the communication range, the authentication operation is completed in a short time, which may impair the convenience of the driver. Absent.

  In addition, the engine is started, but traveling is not permitted, so that the anti-theft effect is not impaired.

  As described above, the vehicle system according to the present embodiment is a vehicle system mounted on a vehicle not equipped with a battery, and the vehicle system performs an ignition control and a fuel injection control for an engine provided in the vehicle. The engine control unit 4 as a control device is compared with an input authentication code input from the outside by wireless communication and a registration authentication code registered in advance in the inside, and if these authentication codes match, the authentication is successful. The smart unit 15 is provided as a smart keyless type vehicle antitheft device that performs an authentication process by determining the case other than that as an authentication failure and transmits an authentication result to the engine control unit 4. After the engine is started by the driver's operation, the engine control unit 4 waits until the authentication result of the successful authentication is received from the smart unit 15 until the engine speed falls below a preset engine rotation speed at which the vehicle can travel. Ignition control and fuel injection control for limiting the rotational speed are executed, and during the execution, when the travel transition operation by the driver is detected, limit control for stopping the engine and prohibiting the travel of the vehicle is performed. With this configuration, in this embodiment, until the authentication process of the smart unit 15 is completed, the ignition control / fuel is controlled so that the engine can be started and the engine can be operated at a lower speed than the preset engine speed. Since the restriction control for executing the injection control is performed, the power required for the operation of the actuator that consumes a large current such as the ignition coil can be suppressed, and the smart keyless type power consumption is large when the authentication code is transmitted. Even if the smart unit 15 is used, the voltage drop of the power supply line at the time of transmitting the authentication code can be reduced, so that it is possible to prevent the engine start from being failed by resetting the microcomputer 6 and the microcomputer 17. . This makes it possible to apply the smart keyless entry, which has a long communication distance, but consumes a large amount of power when transmitting the authentication code, to a vehicle not equipped with a battery. In addition, when the driving transition operation by the driver is detected before the authentication process is completed, the engine is stopped and the vehicle is prohibited from traveling, so that the anti-theft performance can be ensured.

  Further, in the present embodiment, when the engine control unit 4 (internal combustion engine control device) determines whether or not the engine speed has stabilized after starting the engine, and determines that the engine has been stabilized, Since an instruction to start authentication is transmitted to the unit 15 (the vehicle antitheft device), the voltage fluctuation of the power line from the alternator 1 is large and the power generation amount of the alternator 1 has no margin. During the startup, the smart unit 15 does not communicate with the outside for the authentication process, but performs the communication after confirming that the voltage of the power line has stabilized after the engine is started. Even if you use a smart keyless entry that consumes a large amount of power when sending an authentication code, you can reduce the voltage drop of the power line when sending the authentication code. There is an effect that it is possible to prevent the failure of the engine is started by the reset of emissions 17.

  In the present embodiment, the smart unit 15 receives an instruction to start authentication from the engine control unit 4, starts communication with the outside for authentication processing, and is input from the outside (portable device 20). The authentication result of successful authentication is sent to the engine control unit 4 when the input authentication code registered in advance matches the registered authentication code registered in advance, so that the voltage of the power line is stabilized after the engine is started. After confirming that, even if you use smart keyless entry that consumes a lot of power when sending the authentication code, you can reduce the voltage drop of the power line when sending the authentication code. There is an effect that the engine start failure due to the reset of the microcomputer 6 and the microcomputer 17 can be prevented.

  In the present embodiment, the smart unit 15 repeats the authentication process a predetermined number of times until the authentication is successful if the authentication result is an authentication failure, and if the authentication is successful, the authentication success authentication is performed. The result is transmitted to the engine control unit 4, and if not, the authentication result of the authentication failure is transmitted to the engine control unit 4, so that the driver holding the portable device 20 is out of the transmission range of the smart unit 15. Even if the authentication fails in the first communication, if the driver enters the transmission range after that, the authentication can be successful, so the authentication process is performed a preset number of times. Can be retried, so that even a correct driver can prevent misjudgment that would result in authentication failure, the authentication success rate is stable, and accurate and reliable authentication It is possible to row.

  Further, in the present embodiment, the engine control unit 4 performs the ignition when the engine rotation speed becomes equal to or higher than a preset rotation speed before receiving the authentication result of the authentication success from the smart unit 15. Since at least one of the control and the fuel injection control is stopped, it is possible to reliably prevent the vehicle from traveling before the authentication process is completed.

  In the present embodiment, the engine control unit 4 further determines whether or not the transmission of the vehicle is in the neutral state as a limit control until the authentication result of the authentication success is received from the smart unit 15. When monitoring is performed and the vehicle transmission is lost in the neutral state, it is detected that there has been a driving transition operation (change of gears of the transmission) by the driver, and at least one of ignition control and fuel injection control is stopped. Since the engine is stopped, it is possible to reliably prevent the vehicle from running before the authentication process is completed.

  Further, in the present embodiment, the engine control unit 4 further limits the throttle opening of the vehicle to a predetermined value or more as limit control until the authentication result of successful authentication is received from the smart unit 15. If the throttle opening of the vehicle exceeds a preset value, it is detected that there has been a travel transition operation by the driver, and at least one of ignition control and fuel injection control is detected. Since the engine is stopped by stopping the vehicle, it is possible to reliably prevent the vehicle from traveling before the authentication process is completed.

  Further, in the present embodiment, the engine control unit 4 further determines whether or not the vehicle side stand is in the retracted state as the limit control until the authentication result of the authentication success is received from the smart unit 15. When monitoring was performed and the vehicle side stand was in the retracted state, it was detected that there was a travel transition operation by the driver, and the engine was stopped by stopping at least one of ignition control and fuel injection control. Thus, it is possible to reliably prevent the vehicle from running before the authentication process is completed.

  Further, in the present embodiment, the engine control unit 4 stops the restriction control when receiving the authentication success result from the smart unit 15 within the preset time, while the preset time. If the authentication result of the authentication failure is received from the smart unit 15 or if the authentication result is not received from the smart unit 15, at least one of the ignition control and the fuel injection control is stopped to stop the engine. As a result, if the authentication is not established for some reason, the operation of the engine is stopped for a preset time without continuing the operation at a low speed of the engine. It is possible to prevent the consumption of fuel.

  Further, in the present embodiment, the engine control unit 4 determines whether or not the transmission of the vehicle is in the neutral state when it receives an authentication result of successful authentication from the smart unit 15 within a preset time. On the other hand, if an authentication failure authentication result is received from the smart unit 15 within a preset time, or if no authentication result is received from the smart unit 15, the ignition control and Since the engine is stopped by stopping at least one of the fuel injection control, if the authentication is not established for some reason, the monitoring of the transmission is unnecessarily continued at a preset time. Since the operation of the engine is stopped, it is possible to prevent wasteful consumption of power necessary for monitoring.

  Further, in the present embodiment, when the engine control unit 4 receives an authentication result of successful authentication from the smart unit 15 within a preset time, the throttle opening degree of the vehicle is greater than or equal to a preset value. The monitoring of whether or not there is, and when the authentication result of the authentication failure is received from the smart unit 15 within the preset time, or when the authentication result is not received from the smart unit 15, Since the engine is stopped by stopping at least one of the ignition control and the fuel injection control, if the authentication is not established for some reason, it is set in advance without monitoring the throttle opening unnecessarily. Since the operation of the engine is stopped in the set time, it is possible to prevent wasteful consumption of electric power necessary for monitoring.

  In the present embodiment, the engine control unit 4 monitors whether or not the side stand of the vehicle is in the retracted state when receiving an authentication result of successful authentication from the smart unit 15 within a preset time. On the other hand, when the authentication result of the authentication failure is received from the smart unit 15 within the preset time, or when the authentication result is not received from the smart unit 15, the ignition control and the fuel injection control Since the engine is stopped by stopping at least one of the engine, if the authentication is not established for some reason, the engine is operated for a preset time without unnecessarily monitoring the side stand. Therefore, it is possible to prevent wasteful consumption of power necessary for monitoring.

Embodiment 2. FIG.
Embodiment 2 is another embodiment according to the vehicle system of the present invention. FIG. 2 is a diagram showing a configuration of a vehicle system according to the second embodiment. The difference from the first embodiment shown in FIG. 1 is that the second embodiment further includes a communication line 27 for transmitting the drive signal of the ignition coil 7 from the engine control unit 4 to the smart unit 15. . The other configuration is the same as that of the first embodiment shown in FIG. 1, and thus the description thereof is omitted here.

  Even in the configuration of the first embodiment, there is no problem as long as the power generation during idle operation is sufficiently higher than the current consumption of the entire system. However, in order to reduce the vehicle weight, downsizing of the AC generator 1 is important. It is assumed that power generation does not have a sufficient margin for the current consumption of the entire system.

  In such a situation, when the smart unit 15 drives the transmission circuit 18 at a timing when a large amount of current is consumed, the voltage of the power line (capacitor 3 voltage) decreases, the microcomputer 6 and the microcomputer 17 are reset, and the engine is stopped (engine stop). there's a possibility that.

  In the first embodiment, after the engine is started and the engine rotational speed and thus the power supply voltage is stabilized, the microcomputer 6 in the engine control unit 4 transmits an authentication start request to the microcomputer 17 in the smart unit 15 via the communication line 14. The smart unit 15 wirelessly transmits the interrogation signal via the transmission circuit 18, but in the second embodiment, the smart unit 15 further wirelessly transmits the interrogation signal at a timing according to the drive signal of the ignition coil 7.

  Specifically, as shown in FIG. 3, since the ignition drive signal is transmitted as a pulse signal, the transmission circuit 18 starts to be driven by using the end of energization of the ignition coil 7 (falling of the pulse signal) as a trigger, and the interrogation signal Is transmitted wirelessly, the energization timing of the ignition coil 7 that consumes the largest current among the actuators driven by the engine control unit 4 and the transmission circuit 18 do not overlap, and an effect of preventing an excessive voltage drop in the power supply line can be prevented. is there.

  In the example of FIG. 3, the wireless transmission of the first interrogation signal has failed, but the second wireless transmission of the interrogation signal is also executed using the end of energization of the next ignition coil 7 as a trigger. The wireless transmission of the second interrogation signal is successful, and the response signal is normally returned from the portable device 20, so the wireless transmission of the third interrogation signal is not performed.

  In the present embodiment, since the ignition coil 7 has the largest current consumption, the drive timing of the ignition coil 7 and the transmission circuit 18 is not overlapped. However, this is not limited to the ignition coil 7 and is not limited to the system Each time, the drive timing of the transmission circuit 18 may be made not to overlap with the drive timing of the actuator with the largest current consumption, depending on the configuration of the system.

  As described above, also in the present embodiment, the same effect as in the first embodiment can be obtained. Furthermore, in the present embodiment, the smart unit 15 communicates with the outside for authentication processing at a timing that does not overlap with the energization timing of an actuator with high power consumption such as an ignition coil or an injector controlled by the engine control unit 4. Because the authentication code can be transmitted avoiding the operation timing of the actuator with high power consumption, the voltage drop at the time of code transmission can be further reduced, and the microcomputer reset and the engine start failure can be prevented. There is.

Embodiment 3 FIG.
The third embodiment is another embodiment of the vehicle system according to the present invention. FIG. 4 is a diagram showing a configuration of the vehicle system according to the third embodiment. The difference between the first embodiment shown in FIG. 1 and the second embodiment shown in FIG. 2 is that an integrated unit 28 in which the engine control unit 4 and the smart unit 15 are integrated is provided. The microcomputer 6A that executes both of these controls is provided. That is, the microcomputer 6A operates both the microcomputer 6 and the microcomputer 17 shown in FIGS. In the present embodiment, since only one power supply circuit is required, a single power supply circuit 5A that operates both the power supply circuit 5 and the power supply circuit 16 shown in FIGS. 1 and 2 is provided. . Since other configurations are the same as those in the first embodiment in FIG. 1 and the second embodiment in FIG. 2, the description thereof is omitted here.

  In the present embodiment, as described above, as shown in FIG. 4, the engine control unit 4 and the smart unit 15 shown in FIG. 1 and FIG. Is configured. Therefore, the integrated unit 28 includes a power supply circuit 5A, a microcomputer 6A, a transmission circuit 18, a reception circuit 19, and a storage circuit 26.

The power supply circuit 5A performs the operations of both the power supply circuit 5 and the power supply circuit 16 shown in FIGS. That is, the power supply circuit 5 </ b> A generates a 5 V power supply for the internal control circuit in the integrated unit 28 using a power supply that varies from about 12 to 14 V supplied from the rectifier regulator 2.
The microcomputer 6A is operated by the power supplied from the power supply circuit 5A. The microcomputer 6A performs the operations of both the microcomputer 6 and the microcomputer 17 shown in FIGS.
The transmission circuit 18 performs the same operation as the transmission circuit 18 shown in FIGS.
The receiving circuit 19 performs the same operation as the receiving circuit 19 shown in FIGS.
The memory circuit 26 performs the same operation as the memory circuit 26 illustrated in FIGS.

  According to the configuration of the present embodiment, since both the vehicle antitheft control and the engine control are performed by the same microcomputer 6A, each of the actuators driven by the engine control does not require energization and Since it is possible to select a period in which there is sufficient time for driving the transmission circuit 18 and drive the transmission circuit 18 to perform wireless transmission of the interrogation signal, the power line is excessively more reliably than in the second embodiment. This is effective in preventing a significant voltage drop.

  In the first and second embodiments, the microcomputer 6 in the engine control unit 4 and the microcomputer 17 in the smart unit 15 need to communicate via the communication line 14. However, since all the processing is performed by the same microcomputer 6A, it is needless to say that the communication line 14 is unnecessary and the cost can be reduced.

  In the present embodiment, it is needless to say that the cost can be reduced because the casing, the substrate, and the power supply circuit can be shared.

  As described above, also in the present embodiment, the same effect as in the first and second embodiments can be obtained. Further, in the present embodiment, the smart unit 15 and the engine control unit 4 are accommodated in one housing, and the authentication process in the smart unit 15 and the ignition control and combustion injection control in the engine control unit 4 are Since one microcomputer 6A provided in the housing executes, a period in which each actuator of the vehicle is not energized and there is sufficient time for driving the transmission circuit 18 is selected and transmitted. Since the circuit 18 can be driven and wireless transmission of the interrogation signal can be performed, it is possible to prevent an excessive voltage drop of the power supply line and to reduce the manufacturing cost.

  In the above first to third embodiments, the description has been given by taking a small motorcycle, a small outboard motor, and the like as an example of the vehicle. However, regardless of the case, other motorcycles, other outboard motors, or automobiles are used. Needless to say, the present invention can also be applied to other vehicles in general.

  1 AC generator, 2 rectifier regulator, 3 capacitor, 4 engine control unit, 5 power supply circuit, 6, 6A microcomputer, 7 ignition coil, 8 injector, 9 ISC solenoid, 10 crank angle sensor, 11 throttle sensor, 12 neutral Switch, 13 side stand switch, 14 communication line, 15 smart unit, 16 power supply circuit, 17 microcomputer, 18 transmission circuit, 19 reception circuit, 20 portable device, 21 reception circuit, 22 transmission circuit, 23 microcomputer, 24 battery, 25 storage circuit , 26 Memory circuit, 27 Communication line, 28 Integrated unit.

The present invention is a vehicle system mounted on a vehicle that is not equipped with a battery, and an internal combustion engine control device that performs ignition control and fuel injection control for an engine provided in the vehicle, and input that is input from outside by wireless communication The authentication code is compared with a registered authentication code registered in advance. If the authentication codes match, authentication is successful. Otherwise, authentication processing is performed and authentication results. A smart keyless type vehicle antitheft device for transmitting to the internal combustion engine control device, the internal combustion engine control device from the vehicle antitheft device after the engine is started by a driver's operation. Until the authentication result of successful authentication is received, the rotation speed of the engine is limited to less than a preset engine rotation speed at which the vehicle can travel. The ignition control and with executing the fuel injection control that, during the execution, when detecting running transition operation by the driver, the engine is stopped to prohibit the running of the vehicle, performs limiting control The internal combustion engine control device determines whether or not the engine rotation speed has stabilized after the engine is started, and authenticates to the vehicle antitheft device when determining that the engine rotation speed has stabilized. The vehicle anti-theft device receives the authentication start instruction from the internal combustion engine control device, starts communication with the outside for the authentication process, and inputs from the outside In the vehicle system, the authentication result indicating that the authentication is successful is transmitted to the internal combustion engine control device when the input authentication code thus registered matches the registered authentication code registered in advance .

Claims (14)

A vehicle system mounted on a vehicle not equipped with a battery,
An internal combustion engine control device for performing ignition control and fuel injection control for an engine provided in the vehicle;
The input authentication code input from the outside by wireless communication is compared with the registration authentication code registered in advance, and if the authentication codes match, the authentication is successful, and the other cases are determined as authentication failure. A smart keyless vehicle antitheft device that performs authentication processing and transmits an authentication result to the internal combustion engine control device,
The internal combustion engine control device comprises:
After the engine is started by a driver's operation, until the authentication result of the authentication success is received from the vehicle antitheft device, the engine is less than a preset engine rotation speed at which the vehicle can travel. The ignition control and the fuel injection control for limiting the rotation speed are executed, and during the execution, when the driving transition operation by the driver is detected, the engine is stopped and the vehicle is prohibited from driving. Vehicle system with limited control. The internal combustion engine control device comprises:
2. The authentication start instruction is transmitted to the vehicle antitheft device when it is determined whether or not the engine rotation speed has been stabilized after the engine has been started. Vehicle system. The vehicle antitheft device is:
In response to the authentication start instruction from the internal combustion engine control device, communication with the outside for the authentication processing is started, the input authentication code input from the outside and the registration authentication code registered in advance The vehicle system according to claim 2, wherein the authentication result of successful authentication is transmitted to the internal combustion engine control device when the two match. The vehicle antitheft device is:
If the authentication result is an authentication failure, the authentication process is repeated a predetermined number of times until the authentication is successful,
When the authentication is successful, the authentication result of the authentication success is transmitted to the internal combustion engine control device,
Otherwise, the authentication result of authentication failure is transmitted to the internal combustion engine control device. The vehicle system according to any one of claims 1 to 3. The internal combustion engine control device comprises:
If the engine rotation speed becomes equal to or higher than a preset rotation speed before receiving an authentication result indicating successful authentication from the vehicle antitheft device, at least one of the ignition control and the fuel injection control is performed. The vehicle system according to any one of claims 1 to 4, wherein the vehicle system is stopped. The internal combustion engine control device comprises:
Before receiving the authentication success result from the vehicle antitheft device, as the restriction control, it further monitors whether or not the vehicle transmission is in a neutral state, and the vehicle transmission is When it is lost in the neutral state, it is detected that the driver has performed the travel transition operation, and at least one of the ignition control and the fuel injection control is stopped to stop the engine. The vehicle system according to any one of claims. The internal combustion engine control device comprises:
Until receiving an authentication result of successful authentication from the vehicle antitheft device, as the restriction control, further monitoring whether or not the throttle opening of the vehicle is greater than or equal to a preset value, When the throttle opening of the vehicle is greater than or equal to a preset value, it is detected that the driver has performed the travel transition operation, and at least one of the ignition control and the fuel injection control is stopped to The vehicle system according to any one of claims 1 to 6, wherein the engine is stopped. The internal combustion engine control device comprises:
Until the authentication success result is received from the vehicle antitheft device, as the restriction control, it is further monitored whether the side stand of the vehicle is in a retracted state, and the side stand of the vehicle is stored. When it becomes a state, it detects that the said driving | running | working transfer operation was performed by the said driver | operator, and stops at least one of ignition control and fuel-injection control, and stops the said engine. The vehicle system according to item. The internal combustion engine control device comprises:
If the authentication success result of authentication success is received from the vehicle antitheft device within a preset time, the restriction control is stopped,
When the authentication result of the authentication failure is received from the vehicle antitheft device within the preset time, or when no authentication result is received from the vehicle antitheft device, the ignition control and the The vehicle system according to any one of claims 1 to 8, wherein at least one of fuel injection control is stopped to stop the engine. The internal combustion engine control device comprises:
When the authentication success result is received from the vehicle antitheft device within a preset time, the monitoring of whether the transmission of the vehicle is in a neutral state is stopped,
When the authentication result of the authentication failure is received from the vehicle antitheft device within the preset time, or when no authentication result is received from the vehicle antitheft device, the ignition control and the The vehicle system according to claim 6, wherein at least one of fuel injection control is stopped to stop the engine. The internal combustion engine control device comprises:
When the authentication success result is received from the vehicle antitheft device within a preset time, the monitoring of whether the throttle opening of the vehicle is equal to or greater than a preset value is stopped,
When the authentication result of the authentication failure is received from the vehicle antitheft device within the preset time, or when no authentication result is received from the vehicle antitheft device, the ignition control and the The vehicle system according to claim 7, wherein at least one of fuel injection control is stopped to stop the engine. The internal combustion engine control device comprises:
When the authentication success result of the authentication success is received from the vehicle antitheft device within a preset time, the monitoring of whether or not the side stand of the vehicle is in the retracted state,
When the authentication result of the authentication failure is received from the vehicle antitheft device within the preset time, or when no authentication result is received from the vehicle antitheft device, the ignition control and the The vehicle system according to claim 8, wherein at least one of fuel injection control is stopped to stop the engine. The vehicle antitheft device is:
The vehicle system according to any one of claims 1 to 12, wherein communication with the outside for the authentication processing is executed at a timing that does not overlap with an energization timing of an actuator controlled by the internal combustion engine control device. The vehicle antitheft device and the internal combustion engine control device are housed in a single housing,
A single microcomputer provided in the casing executes the authentication process in the vehicle antitheft device and the ignition control and combustion injection control in the internal combustion engine control device. The vehicle system according to any one of claims.

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