JP6393166B2 - Engine control device - Google Patents

Description

  The present invention relates to an engine control device.

  2. Description of the Related Art Conventionally, an engine control device is known that can start and stop a vehicle engine based on a push-button switch pressing operation (see, for example, Patent Document 1).

  In the engine control device, for example, when a driver carries a portable device storing an ID code and gets into the vehicle interior, ID code authentication communication is performed between the portable device and the authentication device mounted on the vehicle. The engine can be started by establishing the authentication communication.

  In the engine control device, the engine is started when the switch is pressed while the driver depresses the brake pedal. If the switch is pushed in with the shift lever in the “P (barking) position”, the engine is stopped.

  Further, the engine control device has a function of forcibly stopping the engine in consideration of a runaway due to an accelerator failure and a brake failure. For example, by long pressing the switch, the engine can be forcibly stopped by stopping the fuel supply or non-igniting the spark plug even during traveling.

  However, in the engine control device having such an engine forced stop function, a signal indicating the switch ON state is generated, for example, when the switch is turned on while the vehicle is running or the harness part is short-circuited. If the input is left as it is, the engine forced stop function is activated and the engine may suddenly stop without warning to the driver.

JP 2007-187031 A

  It is an object of the present invention to provide an engine control device that can improve the safety of the forced stop function of the engine.

As a means for solving the above problems, the present invention provides an operation unit capable of outputting an ON signal and a forced stop signal by operation, an informing unit, and starts the engine based on the ON signal from the operation unit. e Bei and a vehicle control unit for informing that the engine is forcibly stopped by the notification unit with forcibly stop the engine based on the stop signal, the operation portion is a push button switch is pusher button switch, The forced stop signal is output by a long press operation, and the in- vehicle control unit is configured to stop the engine by being released after the forced stop signal is continuously input for a predetermined time or more. It is.

With this configuration, when the operation unit is erroneously operated during engine start-up, or when the operation unit breaks down and a forced stop signal is input, the engine is previously stopped by the notification means for the driver. It can be notified that there is a possibility. Therefore, it is possible for the driver to avoid the danger by taking appropriate measures such as moving the vehicle to an appropriate place in advance because it is possible to prepare for the mind assuming that the engine is forcibly stopped in advance. It becomes. When the operation unit is erroneously pressed for a long time, it is possible to avoid the engine from being stopped by releasing the long press operation by notification by the notification means. Further, when the engine is forcibly stopped, it can be recognized that the operation is appropriately performed by the notification by the notification unit. For example, the engine is not stopped if the ON signal is still input due to a failure of the operation unit while the vehicle is running. Further, since the notification by the notification means is performed, it is possible to recognize that a failure or the like of the operation unit has occurred.

The in-vehicle control unit sets a first set time from the operation of the operation unit until the engine is forcibly stopped, and a second set time shorter than the first set time. It is preferable to notify that there is a possibility that the engine will be stopped if the operation is continued until after the elapse of two set times.

  It is preferable that the in-vehicle control unit notifies the engine that the engine is forcibly stopped until the engine is forcibly stopped after the operation of the operation unit is released.

  According to the present invention, if there is an input of a forced stop signal, the engine is stopped after being previously notified by the notification means, and therefore it is possible to prepare in advance assuming that the engine is forcibly stopped. it can. Therefore, it is possible to prevent the occurrence of a problem that the engine is suddenly stopped to cause an accident or the like.

It is a block diagram which shows a part of engine control apparatus which concerns on this embodiment. It is a flowchart which shows the processing content of the engine starting control by the vehicle-mounted control part of FIG. It is a flowchart which shows the processing content of the engine forced stop control by the vehicle-mounted control part of FIG. It is a time chart which shows the drive state of an engine and a buzzer with respect to operation of a start / stop switch in engine forced stop control by the 1st means. It is a time chart which shows the drive state of an engine and a buzzer with respect to operation of a start / stop switch in engine forced stop control by the 2nd means. It is a time chart which shows the drive state of an engine and a buzzer with respect to operation of a start / stop switch in engine forced stop control by the 3rd means.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use.

  FIG. 1 is a block diagram showing a part of the engine control apparatus according to the present embodiment. The engine control device includes an electronic key 1 (smart key) and an in-vehicle device 2 mounted on the vehicle.

  The electronic key 1 includes a transmission unit 3, a reception unit 4, a power supply unit 5, a storage unit 6, and a key control unit 7.

  The transmission unit 3 includes an RF (radio frequency) transmission circuit 9 to which a transmission antenna 8 is connected. The RF transmission circuit 9 can transmit the ID code via the transmission antenna 8.

  The receiving unit 4 includes an LF (low frequency) receiving circuit 11 to which a coil antenna 10 is connected. The coil antenna 10 is electromagnetically induced by an activation signal transmitted from the vehicle to generate an electromotive force. The coil antenna 10 receives a request signal transmitted from the vehicle. The LF receiving circuit 11 outputs the received request signal to the key control unit 7.

  The power supply unit 5 includes a battery circuit equipped with a battery, is activated by an operation signal from the key control unit 7, and supplies power to the key control unit 7.

  The storage unit 6 stores different request data assigned in advance for each electronic key and an ID code for key verification.

  The key control unit 7 is activated by the electromotive force generated in the coil antenna 10 of the receiving unit 4, outputs an operation signal to the power supply unit 5, and then operates with the power from the power supply unit 5. In addition, the key control unit 7 compares the request signal received following the activation signal from the vehicle with the request data stored in the storage unit 6. If they match, the ID code assigned to each electronic key is output via the transmitter 3. When the transmission is completed, the power supplied from the power supply unit 5 is cut off after a predetermined time has elapsed.

  The in-vehicle device 2 includes a start / stop switch 12, an immobilizer control unit 13, an engine control unit 14, a brake switch 15, an indicator lamp 16, a buzzer 17, a vehicle speed sensor 18, and an in-vehicle control unit 19 connected thereto.

  The start / stop switch 12 is an example of an operation unit according to the present invention, and here, a momentary push button switch is used. When the start / stop switch 12 is pressed, the contact becomes conductive and a signal is output. When a pressing operation is performed while the engine is stopped, the signal is recognized as an ON signal by the engine control unit 14 under a predetermined condition. On the other hand, when a pressing operation is performed in the engine start state, the signal is recognized as an off signal under a predetermined condition. Further, when a predetermined operation as described later is performed in the engine start state, it is recognized as a forced stop signal.

  The immobilizer control unit 13 is a control unit including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). A transceiver 20 is connected to the immobilizer control unit 13, and communication is performed with the electronic key 1. When the driver carrying the electronic key 1 opens the door or gets into the passenger compartment, the ID code stored in the electronic key 1 is read and transmitted to the immobilizer control unit 13. Then, the immobilizer control unit 13 collates whether or not the received ID code matches the ID code stored in advance.

  The in-vehicle control unit 19 is a control unit including a CPU, a ROM, and a RAM. The in-vehicle controller 19 checks the ID code held by the immobilizer controller 13 when the brake pedal is depressed (when an on signal is received from the brake switch 15) in the engine start standby state (vehicle speed 0 km). Get the result. When the acquired collation result is collation OK (ID code matches) and the start / stop switch 12 is pressed, the engine control unit 14 outputs a start signal for starting the engine.

  The engine control unit 14 is a control unit including a CPU, a ROM, and a RAM. The engine control unit 14 controls operation states of the starter motor 21, the injector 22 (fuel injection valve), and the spark plug 23. That is, when the engine control unit 14 receives a start signal from the in-vehicle control unit 19, the starter motor 21, the injector 22, and the spark plug 23 are operated to start the engine. That is, the engine is started by fuel injection from the injector 22 and ignition of the spark plug 23 while rotating the starter motor 21 (cranking). When the engine control unit 14 receives an engine stop signal from the in-vehicle control unit 19, the engine control unit 14 stops the fuel injection operation of the injector 22 and the ignition operation of the spark plug 23 to stop the engine. That is, when the vehicle is stopped and the start / stop switch 12 is pushed in (the push operation for a short time of about 1 sec) in a state where the shift lever is in the “P position”, the in-vehicle control unit 19 performs the engine control unit. The engine stop signal is transmitted to 14, and the engine stops.

  The brake switch 15 detects the depression operation of the brake pedal, and inputs the detection signal to the in-vehicle control unit 19.

  The vehicle speed sensor 18 is provided in an ABS (anti-lock / brake system), detects the rotation of the output shaft of each wheel transmission, and inputs a vehicle speed detection signal to the in-vehicle control unit 19.

  The indicator lamp 16 is provided on a meter panel (not shown) in the vehicle, blinks when the engine is forcibly stopped and the engine is stopped, and notifies that the engine has been forcibly stopped.

  The buzzer 17 is an example of a notifying unit according to the present invention. When the forced stop operation of the engine is performed, a warning sound is emitted in the vehicle to notify that the engine is forcibly stopped. However, not only the buzzer 17 but also other means that can be notified by voice, an indicator, blinking of an in-vehicle room lamp, or the like can be employed.

  Next, the operation of the engine control apparatus having the above configuration will be described.

(Engine start)
As shown in the flowchart of FIG. 2, the in-vehicle control unit 19 performs engine start control as follows.
First, the collation result of the ID code held by the immobilizer control unit 13 is acquired (step S1). The ID code is transmitted from the electronic key 1 to the immobilizer control unit 13 by the transceiver 20 of the in-vehicle device 2 when the driver carrying the electronic key 1 gets into the vehicle while the engine is stopped. The immobilizer control unit 13 collates the received ID code with a previously stored ID code. If the ID code matches with the collation result (step S2), the process proceeds to the next step.

  Subsequently, it is determined whether or not the brake pedal is depressed (step S3). Whether or not the brake pedal is depressed is determined by whether or not an on signal is output from the brake switch 15 provided in the vicinity of the brake pedal.

  If the brake is on, it is determined whether an on signal is input from the start / stop switch 12 (step S4). If the start / stop switch 12 is pressed and an ON signal is input, an engine start signal is transmitted to the engine control unit 14 (step S5). As a result, the engine is started by rotational driving of the starter motor 21, fuel injection from the injector 22, and ignition of the spark plug 23.

  As described above, the engine control unit 14 confirms the ID code collation result when the brake pedal is depressed, and immediately starts the engine when the start / stop switch 12 instructs to start the engine.

(Forced engine stop)
In some emergency, for example, the engine can be forcibly stopped by operating the start / stop switch 12 while the engine is being driven by the following three means.

(First means)
In the first means, as shown in the flowchart of FIG. 3, it is determined whether or not the start / stop switch 12 has been pressed again after the engine has been started by pressing the start / stop switch 12 (step S1). S11). As shown in FIG. 4, if the start / stop switch 12 is pressed while the engine is being driven, the buzzer 17 notifies that the start / stop switch 12 is being pressed (step S12). As a result, the driver recognizes that the engine may be stopped in advance, and can make preparations.

  Then, it is determined whether or not the start / stop switch 12 has been pressed a predetermined number of times before the predetermined time has elapsed since the re-operation of the start / stop switch 12 (step S13). If the start / stop switch 12 is pressed a predetermined number of times, it is determined that the forced stop operation of the engine has been performed, and the engine is forcibly stopped at that time (step S15). That is, the vehicle-mounted control unit 19 forcibly stops the engine when an ON signal (forced stop signal) by pressing the start / stop switch 12 is input a predetermined number of times within a predetermined time during engine driving. If the number of times the start / stop switch 12 is pressed is less than the predetermined number, the engine is not forcibly stopped. As a result, when the start / stop switch 12 is erroneously operated (for example, when pressed only once), the operation can be continued without stopping the engine. Even when the start / stop switch 12 fails and continues to output an ON signal, the engine is not stopped in the same manner. In this case, you may make it notify separately that the start / stop switch 12 failed.

(Second means)
The second means is the same as the first means in that it is determined whether or not the start / stop switch 12 is pressed during engine operation. However, as shown in FIG. 5, it is determined whether or not the pressing operation has been performed for a predetermined time (first set time), not the number of pressing operations of the start / stop switch 12 determined in step S14. It is different in point.

  In other words, the vehicle-mounted control unit 19 receives the ON signal (forced stop signal) by the pressing operation of the start / stop switch 12 continuously for a predetermined time (first set time) or more during driving of the engine. Forcibly stop. Therefore, it is notified that the engine is forcibly stopped by the buzzer 17 before a predetermined time when the engine is stopped. This notification is continuously performed while the start / stop switch 12 is being pressed. Further, in this configuration, the engine is not forcibly stopped unless the pressing operation of the start / stop switch 12 is continued. Therefore, it is preferable in that the engine is not forcibly stopped when the driver erroneously presses the start / stop switch 12 while the engine is being driven. In this case, the notification by the buzzer 17 may be started after the time shorter than the first set time (second set time) has elapsed since the start / stop switch 12 was pressed. Thereby, in the case of an erroneous operation, the notification itself by the buzzer 17 can be prevented, and the user is not confused.

(Third means)
The third means is the same as the second means in that the engine is forcibly stopped by continuously pressing the start / stop switch 12 for a certain period of time, but the difference is when the forced stop is executed. To do. That is, as shown in FIG. 6, in the second means, when the pressing operation of the start / stop switch 12 is continuously performed for a predetermined time or more, a predetermined time has elapsed from the start of the pressing operation of the start / stop switch 12. However, the third means is different in that the engine is forcibly stopped when the pressing operation of the start / stop switch 12 is released after a predetermined time has elapsed.

  That is, in the third means, the on-vehicle controller 19 receives an ON signal (forced stop signal) by pressing the start / stop switch 12 continuously for a predetermined time (first set time) or more during driving of the engine. After that, the engine is forcibly stopped when the ON signal is no longer input. Further, the third means notifies that the engine is forcibly stopped by the buzzer 17 at least a predetermined time before the engine stops. This notification is continuously performed while the start / stop switch 12 is being pressed.

  This is excellent in that the engine is not forcibly stopped when the start / stop switch 12 continues to output an ON signal due to a failure or the like while the engine is being driven. In this case as well, as in the case of the second means, a second set time may be provided to prevent erroneous notification by the buzzer 17. Alternatively, the engine may be forcibly stopped after a predetermined time has elapsed since the start / stop switch 12 is no longer turned on.

  As described above, when the engine is forcibly stopped, the driver is notified in advance, so that preparations can be made and the vehicle can be moved to a safe place.

  In addition, this invention is not limited to the structure described in the said embodiment, A various change is possible.

  For example, in the above-described embodiment, the driver is simply notified that the vehicle is forcibly stopped, but the time until the vehicle is forcibly stopped may be notified by voice.

  In the above embodiment, the buzzer 17 notifies only when the start / stop switch 12 is pressed. However, after the start / stop switch 12 is pressed once, the start / stop switch 12 is started. / Even if the pressing operation of the stop switch 12 is released, the notification may be continued until the engine is forcibly stopped.

  Further, in the first means, before the start / stop switch 12 is pressed the predetermined number of times, the engine is forcibly stopped if the start / stop switch 12 is further pressed. The driver may be configured to prevent erroneous operation.

  In the second means, after the second set time shorter than the first set time from when the start / stop switch 12 is pressed until the engine is forcibly stopped, the start / stop is further stopped. It may be configured to notify the driver that the engine is forcibly stopped when the switch 12 is pressed to prevent the driver from operating erroneously.

  In the above-described embodiment, the start / stop switch 12 is described as an example of the operation unit. However, the present invention is not limited to this, and other types such as a slide-type switch and a touch panel may be used. In addition to the start / stop switch 12, another switch or the like can be provided as the operation unit.

DESCRIPTION OF SYMBOLS 1 ... Electronic key 2 ... In-vehicle apparatus 3 ... Transmission part 4 ... Reception part 5 ... Power supply part 6 ... Memory | storage part 7 ... Key control part 8 ... Transmission antenna 9 ... Transmission circuit 10 ... Coil antenna 11 ... Reception circuit 12 ... Start / stop Switch (operation unit)
DESCRIPTION OF SYMBOLS 13 ... Immobilizer control part 14 ... Engine control part 15 ... Brake switch 16 ... Indicator lamp 17 ... Buzzer (notification part)
DESCRIPTION OF SYMBOLS 18 ... Vehicle speed sensor 19 ... Vehicle-mounted control part 20 ... Transmitter / receiver 21 ... Starter motor 22 ... Injector 23 ... Spark plug

Claims (3)

An operation unit capable of outputting an ON signal and a forced stop signal by operation;
Notification means;
An in-vehicle control unit that starts the engine based on an ON signal from the operation unit, forcibly stops the engine based on a forced stop signal, and notifies that the engine is forcibly stopped by the notification unit;
Bei to give a,
The operation unit is a push button switch, and the push button switch outputs the forced stop signal when a long press operation is performed,
The in-vehicle control unit stops the engine by being released after the forced stop signal is continuously input for a predetermined time or more, and is stopped . The in-vehicle control unit sets a first set time from the operation of the operation unit until the engine is forcibly stopped, and a second set time shorter than the first set time. 2. The engine control device according to claim 1, wherein when the operation is continued until a lapse of two set times, the engine control device notifies that the engine may be stopped . The in-vehicle control unit causes the notification unit to notify that the engine is forcibly stopped until the engine is forcibly stopped after the operation of the operation unit is released. The engine control device described.

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