JP5784782B1 - Internal combustion engine control device with anti-theft function - Google Patents

Abstract

An anti-theft internal combustion engine control device that prevents a driver from starting an engine with a starter motor when a battery voltage drops is obtained. After the key switch 3 is operated, the control unit 6 of the in-vehicle device 2 indicates the state of the battery 1 with the voltage / current detection circuit 7 before authenticating the ID code held by the portable device 22. As an example, the voltage of the battery 1 and the current flowing through the transmission circuit 8 using the battery 1 as a power source are detected. If these are equal to or greater than a predetermined value, the ID code possessed by the portable device 22 is authenticated using the battery 1 as a power source. When the transmission circuit 8 is used and the ID code of the portable device 22 can be authenticated, the driver starts the engine with the starter motor 26. [Selection] Figure 1

Description

  The present invention relates to a control device for an internal combustion engine with an anti-theft function having a theft prevention function in a vehicle propelled by an internal combustion engine such as a motorcycle.

The conventional vehicle anti-theft system compares ID codes stored between a transmitter / receiver (portable device) carried by a driver and a vehicle-side transmitter / receiver (on-vehicle device). If the ID codes match, the internal combustion engine control device is allowed to start the engine of the vehicle, and if they do not match, the engine start is prohibited.
Here, the vehicle-mounted device operates by being fed from a battery mounted on the vehicle body. Therefore, when sufficient power is not supplied to the vehicle-mounted device due to a decrease in power supply voltage or the like, ID code verification cannot be performed. In particular, in the case of a motorcycle, since a battery with a relatively small capacity is often mounted, it is necessary to consider a decrease in battery voltage.
In order to make it possible to verify the ID code even when the power supply voltage is lowered, Patent Document 1 discloses a technology that enables engine start by kick start in a short time in a motorcycle with a kick start mechanism equipped with an anti-theft device. Is disclosed.

Japanese Patent No. 4136922 (pages 3-7, FIG. 1)

In the conventional vehicle antitheft system, when the battery voltage is low, it is necessary to start the starter and then start the kick when the engine cannot be started.
In addition, by collating the ID code with the portable device at the time of battery voltage drop and continuously driving the starter, not only will the voltage drop further cause battery deterioration, but in the worst case when the battery is completely discharged Kick starting can also be difficult.
On the other hand, the battery is heavy, and for the purpose of reducing the vehicle weight, the two-wheeled vehicle with the kick starter has a small battery capacity, and the battery voltage is likely to decrease. The battery is deteriorated by the current consumed by communication and the current consumed by continuous drive of the starter.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an internal combustion engine control device with an anti-theft function that prevents a driver from starting the engine with a starter motor when the battery voltage drops. And

In the internal combustion engine control device with an anti-theft function according to the present invention, an internal combustion engine control device with an anti-theft function for controlling the start of the engine of a vehicle configured to be able to start the engine by a starter motor and a kick starter , battery constituting a power supply for authentication of the ID code held by the portable device, before the authentication of the ID code are detected battery state detection circuit for detecting a value that indicates the state of the battery, and this battery state detection circuit depending on the value indicating the status of the battery, performs an authentication of the ID code held by the portable device, a control unit for controlling the starting of the engine, the control unit includes a value indicating the status of the battery is first value In the above case, the battery is used as a power source to authenticate the ID code held by the portable device, and when this ID code authentication is successful, When the engine is started by the tarter motor and the value indicating the state of the battery is less than the first value and greater than or equal to the second value that is smaller than the first value, the ID held by the portable device using the battery as a power source When the code is authenticated and the ID code is successfully authenticated, the engine is started by the kick starter. When the battery status value is less than the second value, the engine is started by the kick starter for a certain period of time. Then, the power generated by the generator is used to authenticate the ID code held by the portable device, and when the ID code is successfully authenticated, the engine is continuously operated .

According to the present invention, there is provided a theft prevention function internal combustion engine control device that controls starting of the starter motor and the kick starter vehicle configured to allow starting of the engine by the engine, the ID code held by the portable device battery constituting a power supply for authentication, before authentication of the ID code, depending on the value indicating the battery state detection circuit that detects a value indicating the status of the battery, and the state of the battery detected by the battery state detection circuit And authenticating the ID code held by the portable device and including a control unit for controlling engine start , and the control unit uses the battery as a power source when the value indicating the state of the battery is equal to or greater than the first value. Authenticate the ID code held by the portable device, and when the ID code is successfully authenticated, start the engine with the starter motor and When the value indicating the state of the terry is less than the first value and greater than or equal to the second value smaller than the first value, the ID code held by the portable device is authenticated using the battery as a power source. When the ID code is successfully authenticated, the engine is started by the kick starter. When the value indicating the state of the battery is less than the second value, the engine is started by the kick starter for a predetermined time, and then the generator The generated power is used to authenticate the ID code held by the portable device, and when the ID code is successfully authenticated, the engine is continuously operated. Therefore, when the battery condition is insufficient, the driver Can prevent the starter motor from starting the engine.

It is a block diagram which shows the internal combustion engine control apparatus with a theft prevention function by Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the internal combustion engine control apparatus with a theft prevention function by Embodiment 1 of this invention. It is a flowchart which shows the operation | movement branched from FIG. 2 of the internal combustion engine control apparatus with a theft prevention function by Embodiment 1 of this invention. It is a flowchart which shows another operation | movement branched from FIG. 2 of the internal combustion engine control apparatus with a theft prevention function by Embodiment 1 of this invention. It is a block diagram which shows the internal combustion engine control apparatus with a theft prevention function by Embodiment 2 of this invention.

Embodiment 1 FIG.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a block diagram showing an internal combustion engine control device with an anti-theft function according to Embodiment 1 of the present invention.
In FIG. 1, an in-vehicle device 2 of an internal combustion engine control device with an anti-theft function includes a control unit 6 that controls the vehicle, an output circuit 4 that performs various outputs in response to instructions from the control unit 6, and a generator 27 or a battery. 1 has a power supply circuit 5 that supplies power to each part of the in-vehicle device 2 based on the input from 1, and further, a transmission circuit 8 and a reception unit 9 for communicating with the portable device 22 of the vehicle antitheft device, and the present invention. It comprises a voltage / current detection circuit 7 (battery state detection circuit) that detects the current (value indicating the battery state) of the transmission circuit 8 and detects the voltage of the battery 1 (value that indicates the battery state). Yes.
The control unit 6 is supplied with operation signals for the motorcycle key switch 3 and the start switch 31 for driving the starter relay 15 and the starter motor 26.
The output circuit 4 outputs to the steering lock releasing means 12 for releasing the steering lock, the display lamp 13 and the buzzer 14 for notifying the driver, and the starter relay 15 connected to the starter motor 26.
A power generator 27 and a regulator 28 are connected to the power supply circuit 5. A battery power source is used before starting the engine, and power generated by the generator 27 is used after starting the engine.

The engine control unit 16 includes a control unit 18 that performs engine control, a power supply circuit 17 that supplies power to each unit in the engine control unit 16, and an output circuit 19 that outputs to the actuator 11 in response to an instruction from the control unit 18. It is configured. A circuit for communicating with the vehicle-mounted device 2 is also included.
The control unit 18 is configured to receive outputs of various sensors 20, a side stand switch 21, and a throttle position sensor 30.

  The portable device 22 is held by the driver and communicates with the in-vehicle device 2 for authentication. The portable device 22 includes a storage unit 23 having a unique ID, a transmission unit 24 that transmits a signal to the in-vehicle device 2, and a reception unit 25 that receives a signal from the in-vehicle device 2.

The operation will be described below.
In the first embodiment, when the key switch 3 signal is given to the in-vehicle device 2, the transmission circuit 8 that transmits the ID code from the in-vehicle device 2 having the voltage / current detection circuit 7 is driven. At this time, the state of the battery 1 is grasped from the measurement result of the voltage / current detection circuit 7, and the starter motor 26 is not driven by the driver when the starter motor 26 cannot start the engine. is there.

Next, it demonstrates in detail using the flowchart of FIGS.
First, the operation shown in FIG. 2 will be described.
A driver carrying the portable device 22 operates the key switch 3 of the motorcycle to which the in-vehicle device 2 is attached. When the key switch 3 is operated (step S1), if the voltage of the battery 1 is equal to or higher than the voltage at which the vehicle-mounted device 2 and the engine control unit 16 can operate (Yes in step S2), the vehicle-mounted device 2 Before transmitting the ID code possessed by the vehicle-mounted device 2 and collating the ID code with the portable device 22, the transmission circuit 8 (predetermined circuit) is operated, and the code not related to the collation of the ID code Send.
At this time, the voltage / current detection circuit 7 measures the circuit current and battery voltage flowing through the transmission circuit 8 during code transmission, and the control unit 6 receives them (step S3). Next, the control unit 6 operates as follows according to the measured current value / voltage value (step S4).

(1) First, when the measured value (value indicating the state of the battery) of the voltage / current detection circuit 7 is equal to or higher than the voltage / current value necessary for the operation of the starter motor 26 ( first value or more) (step) The control part 6 collates ID code with respect to the portable device 22 (Yes in S4) (step S5).
In this verification method, the control unit 6 transmits transmission data including an ID code to the transmission circuit 8 and transmits the transmission data from the transmission circuit 8 to the portable device 22. After receiving the ID code at the receiving unit 25, the portable device 22 collates with the ID code stored in the storage unit 23. If the ID matches, the portable device 22 sends the ID code stored in the storage unit 23 to the transmitting unit. 24 to the in-vehicle device 2.

The in-vehicle device 2 receives the ID code transmitted from the portable device 22 by the receiving unit 9, and then checks the ID code by the control unit 6 (step S6). Here, if the ID code collation does not match (No in step S6), the in-vehicle device 2 displays the display lamp 13 or rings the buzzer 14 (indicator control) to inform the driver of the ID code mismatch. You may be notified. At the same time, the in-vehicle device 2 transmits an engine start prohibition signal to the engine control unit 16 using the communication line 29 (step S9).
When the engine control unit 16 receives the start prohibition signal, the engine control unit 16 restricts the output circuit 19 so that the engine does not start. The restriction at this time is ignition prohibition or the like.

Only when the ID codes match (Yes in step S6), the starter relay 15 is driven so that the starter motor 26 can be driven. At the same time, the in-vehicle device 2 uses the communication line 29 to allow the engine control unit 16 to permit continuous engine operation (step S7).
At this time, the display lamp 13 and the buzzer 14 may be driven to notify the driver. The locked steering may be released by driving the steering lock releasing means 12 or transmitting a signal.
Thereafter, the driver can start the engine by operating the start switch 31 to drive the starter motor 26 (step S8). At this time, the engine can be continuously operated because the in-vehicle device 2 completes the ID code verification with the portable device 22 and permits the engine control unit 16 to continuously operate the engine. It is a state.

(2) Next, the measured value (current value / voltage value) of the voltage / current detection circuit 7 is less than a necessary and sufficient value for the operation of the starter motor 26 (No in step S4), and the in-vehicle device 2 and the portable device 22 If the voltage value / current value (second value) is such that the ID code can be verified (Yes in step S10), the in-vehicle device 2 transmits the ID code to the portable device 22 by the transmission circuit 8, ID code verification is performed (step S11). At the same time, the operation of the starter relay 15 is prohibited (step S12). Here, the ID code collation method is the same as that in the case where the measured value of the voltage / current detection circuit 7 is equal to or greater than the value necessary and sufficient for the operation of the starter motor 26 (step S6).
At the same time, the in-vehicle device 2 notifies the driver that starter drive (engine start by the starter motor) is prohibited (step S12). As a notification method, the display lamp 13 connected to the in-vehicle device 2 may be displayed and the buzzer 14 may be sounded. In addition, information indicating that starter driving is prohibited may be transmitted to the engine control unit 16 using the communication line 29, and a display lamp or buzzer connected to the engine control unit 16 may be sounded.

If the ID code matches (Yes in step S <b> 11), the in-vehicle device 2 transmits an engine continuous operation permission signal to the engine control unit 16 using the communication line 29. At the same time, the vehicle-mounted device 2 notifies the driver to start with a kick (engine start with a kick starter) (step S12). In this method, the display lamp 13 may be displayed and the buzzer 14 may be sounded. At this time, the engine control unit 16 is in a state in which the engine can be continuously operated.
After the engine is started (step S14) by the kick start (step S13) by the driver, the locked steering may be released by driving the steering lock releasing means 12 or transmitting a signal.

If the ID code verification does not match (No in step S11), the in-vehicle device 2 may display the display lamp 13 or sound the buzzer 14 to notify the driver of the ID code mismatch.
At the same time, the in-vehicle device 2 transmits an engine start prohibition signal to the engine control unit 16 using the communication line 29. When the engine control unit 16 receives the start prohibition signal, the engine control unit 16 restricts the output circuit 19 so that the engine does not start (step S15).

(3) Next, the operation shown in FIG. 3 will be described.
Voltage / current detection value of the voltage / current detection circuit 7 is less than a value necessary and sufficient for the operation of the starter motor 26 (No in step S4) and the ID code of the in-vehicle device 2 and the portable device 22 cannot be verified. (No in step S10) If the voltage / current allows kick start with the battery 1 connected (Yes in step S16), the in-vehicle device 2 sends the signal to the portable device 22 by the transmission circuit 8. The transmission of the ID code is prohibited, and the operation of the starter relay 15 is also prohibited (step S17).
At this time, the vehicle-mounted device 2 notifies the driver that starter driving is prohibited and ID code verification is not completed (step S17). As a notification method, the display lamp 13 connected to the in-vehicle device 2 may be displayed and the buzzer 14 may be sounded.
Also, using the communication line 29, information indicating that starter driving is prohibited and ID code verification is incomplete is transmitted to the engine control unit 16, and a display lamp or buzzer connected to the engine control unit 16 is transmitted. May be sounded.
Moreover, the vehicle-mounted device 2 notifies the driver to start with a kick. In this method, the display lamp 13 may be displayed and the buzzer 14 may be sounded. At this time, the engine control unit 16 is allowed to start the engine, but is in a state where continuous operation for a predetermined time or longer is prohibited.

After the driver starts the engine by kick start (steps S18 and S19), the in-vehicle device 2 starts collating the portable device 22 with the ID code (step S20). This collation method is performed in the same manner as when the measured value of the voltage / current detection circuit 7 is equal to or greater than the value necessary and sufficient for the operation of the starter motor 26 (step S6).
If the ID code verification is completed and the ID codes match (Yes in step S20), the in-vehicle device 2 transmits a signal for permitting continuous operation of the engine to the engine control unit 16 using the communication line 29 (step S20). S21). At this time, as the continuous operation permission time of the engine control unit 16, it is necessary to set a time sufficient for collating the ID code.

If the ID code verification does not match (No in step S20), the in-vehicle device 2 may display the display lamp 13 or sound the buzzer 14 to notify the driver of the verification mismatch (step S22). ). If the ID codes do not match, the engine may be stopped after a certain time to prevent theft (step S23).
Here, if the ID codes do not match, in addition to stopping the engine, there are also means for holding the engine speed below a certain level, disabling the steering lock, alarming with a buzzer, and stopping the engine when the side stand is released. is there.

In order to keep the engine speed below a certain level, a motorcycle has a form in which a wheel and a drive shaft are connected when the engine speed is above a certain level. When used in a motorcycle of this form, the engine Even when driving and when the ID codes do not match, the motorcycle cannot be moved, which has the effect of preventing theft.
Steering lock cannot be released means that the steering wheel cannot be rotated in a state where the ID code does not match and the steering lock is locked even when the engine is operating, and the motorcycle cannot be run, so that the anti-theft effect is obtained.
Alarming with a buzzer has the effect of preventing theft by alerting the vehicle to the surroundings by ringing the buzzer connected to the vehicle-mounted device 2 when the ID codes do not match and the engine is operating.
The means for stopping the engine when the side stand is released is a signal to the control unit 18 of the engine control unit 16 when the driver releases the side stand switch 21 before traveling while the ID code does not match and the engine is operating. And the controller 18 stops the engine to prevent theft.

(4) Next, the measured value of the voltage / current detection circuit 7 is less than a value necessary and sufficient for the operation of the starter motor 26, the ID codes of the in-vehicle device 2 and the portable device 22 cannot be verified, and the battery 1 A case where the kick start is impossible in a state in which is connected (No in step S16) will be described.
With such a battery voltage, when kick start is performed, the generated current due to the kick flows into the battery 1, making it difficult to start the engine. At this time, the vehicle-mounted device 2 notifies the driver of removal of the battery 1 (step S24).
As a notification method, the display lamp 13 connected to the in-vehicle device 2 may be displayed and the buzzer 14 may be sounded. Also, using the communication line 29, information indicating that starter driving is prohibited and ID code verification is incomplete is transmitted to the engine control unit 16, and the display lamp 13 and buzzer connected to the engine control unit 16 are transmitted. 14 may be sounded.

After removing the battery 1 (step S25), the engine is started by kick start (step S26) (step S27). At this time, the engine control unit 16 is permitted to start the engine, but is in a state in which continuous operation for a certain time or more is prohibited.
The subsequent operations after collating the ID code (step S28) are such that the measured value of the voltage / current detection circuit 7 is less than a necessary and sufficient value for the operation of the starter motor 26, and the ID codes of the in-vehicle device 2 and the portable device 22 are the same. The operation is the same as in the case of a voltage / current value that can be verified (step S20).

(5) Finally, the operation shown in FIG. 4 will be described.
FIG. 4 shows a case where the battery voltage is lower than the voltage at which the vehicle-mounted device 2 and the engine control unit 16 can operate (No in step S2).
At this time, even if the driver operates the key switch 3, since the vehicle-mounted device 2 is in an inoperable state, the display lamp 13 and the buzzer 14 are driven to notify the driver of starter start and kick start. I can't.
At this time, the engine control unit 16 is permitted to start the engine, but continuous operation for a certain time or more is prohibited.
After the driver starts the engine at kick start (step S32) (step S33), the in-vehicle device 2 starts collating the ID code with the portable device 22 (step S34). The ID code verification method is the same as that in the case where the measured value of the voltage / current detection circuit 7 is equal to or higher than the voltage / current value necessary and sufficient for the operation of the starter motor 26 (step S6).

If the ID code verification is completed and the ID codes match (Yes in step S34), the vehicle-mounted device 2 transmits information on permission to continuously operate the engine to the engine control unit 16 using the communication line 29 (step S34). S35).
At this time, as the continuous operation permission time of the engine control unit 16, it is necessary to set a time sufficient for collating the ID code.

If the ID code verification does not match (No in step S34), the in-vehicle device 2 may display the display lamp 13 or sound the buzzer 14 to notify the driver of the verification mismatch (step S36). ). If the ID codes do not match, the engine is stopped after a certain time (step S37). The certain time at this time is a sufficient time from when the engine is started until the vehicle-mounted device 2 completes collation of the portable device 22 and the ID code.
Here, if the ID codes do not match, in addition to stopping the engine, there are also means for holding the engine speed below a certain level, disabling the steering lock, alarming with a buzzer, and stopping the engine when the side stand is released. is there.
With respect to these means, the measured value of the voltage / current detection circuit 7 is less than a value necessary and sufficient for the operation of the starter motor 26, and the voltage / current value of the ID code of the in-vehicle device 2 and the portable device 22 cannot be verified. This is the same as the case (step S23).

According to the first embodiment, the starter continuous drive in a state in which the engine cannot be started is limited, so that battery deterioration due to overdischarge of the battery can be suppressed.
In addition, since the driver can determine whether the starter is driven or kick-started based on a notification from the in-vehicle device, it is possible to prevent erroneous engine starting and shorten the starting time.
Furthermore, since the ID code is not verified below a certain value depending on the battery voltage, no extra power is consumed when starting the engine.

Embodiment 2. FIG.
FIG. 5 is a block diagram showing an internal combustion engine control device with an anti-theft function according to Embodiment 2 of the present invention.
In FIG. 5, 1-31 are the same as those in FIG. In FIG. 5, the start switch 31, the starter relay 15 and the starter motor 26 are connected to the engine control unit 16.

In the second embodiment, the start switch 31, the starter relay 15, and the starter motor 26 are connected to the engine control unit 16 as compared with the first embodiment.
In the first embodiment, the starter motor drive permission / prohibition is determined by the in-vehicle device 2, but in the second embodiment, the result determined by the in-vehicle device 2 is transmitted to the engine control unit 16 through the communication line 29. The engine control unit 16 permits / prohibits starter motor driving.

  The configuration of the second embodiment also has the same effect as that of the first embodiment.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 battery, 2 in-vehicle device, 3 key switch, 4 output circuit, 5 power supply circuit,
6 control unit, 7 voltage / current detection circuit, 8 transmission circuit, 9 reception unit, 10 storage unit,
11 Actuator, 12 Steering lock release means, 13 Indicator lamp,
14 buzzer, 15 starter relay, 16 engine control unit, 17 power supply circuit, 18 control unit, 19 output circuit, 20 various sensors, 21 side stand switch,
22 portable devices, 23 storage units, 24 transmission units, 25 reception units, 26 starter motors,
27 Generator, 28 Regulator, 29 Communication line, 30 Throttle position sensor,
31 Start switch.

Claims (3)

A theft prevention function internal combustion engine control device that controls starting of the starter motor and the kick starter vehicle configured to allow starting of the engine by the engine, the power for authenticating the ID code held by the portable device Make up battery,
A battery state detection circuit for detecting a value indicating the state of the battery before authentication of the ID code;
And according to the value indicating the state of the battery detected by the battery state detection circuit , the ID code possessed by the portable device is authenticated, and a control unit for controlling the start of the engine is provided .
When the value indicating the state of the battery is greater than or equal to the first value, the control unit authenticates the ID code held by the portable device using the battery as a power source and successfully authenticates the ID code And start the engine with a starter motor,
When the value indicating the state of the battery is less than the first value and greater than or equal to the second value smaller than the first value, the ID code held by the portable device is set using the battery as a power source. When the authentication is successful and the ID code is successfully authenticated, the engine is started by the kick starter,
When the value indicating the state of the battery is less than the second value, an ID held by the portable device using the electric power generated by the generator after starting the engine for a predetermined time by the kick starter An internal combustion engine control device with an anti-theft function , wherein the engine is continuously operated when the code is authenticated and the ID code is successfully authenticated .   The anti-theft according to claim 1, wherein the value indicating the state of the battery detected by the battery state detection circuit is a voltage of the battery and a current flowing through a predetermined circuit using the battery as a power source. Function internal combustion engine controller.   3. The internal combustion engine control with an anti-theft function according to claim 1, wherein the starter motor is connected to the control unit via a communication line and is provided in an engine control unit that controls the engine. apparatus.

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