JP2006315536A - Anti-theft device for vehicle with engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-theft device for a vehicle equipped with an engine capable of preventing the vehicle operations from stopping undeliberately even if a failure occurs in a control unit after a start signal is emitted upon judging that the person appearing is a true user. <P>SOLUTION: The anti-theft device for the vehicle equipped with the engine is equipped with a portable transmitter/receiver to be carried by the user of the vehicle and a control unit mounted on the vehicle for judging whether the person appearing is a true user on the basis of the two-way communication with the portable transmitter/receiver and emitting a start signal to put electric appliances necessary for the vehicle operations in continuity to a power supply in compliance with the starting operation after judgement that the person is a true user, wherein the condition that the electric appliances 40 and 41 necessary for the vehicle operations are put in continuity to the power supply 42 is held by a self-holding circuit 44 until the stopping operation is conducted after the start signal is emitted from the control unit 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable transmitter / receiver carried by a user of a vehicle such as a motorcycle, a buggy, and a water scooter, and whether or not the user is an authorized user based on bidirectional communication between the portable transmitter / receiver. And a control unit mounted on the vehicle so as to output a start signal for conducting electrical equipment necessary for operation of the vehicle to a power source in accordance with a start operation after determining whether the vehicle is a legitimate user The present invention relates to an antitheft device for a vehicle with an engine.

Such an anti-theft device is already known from, for example, Patent Document 1 and Patent Document 2.
Japanese Patent No. 2678502 Japanese Patent No. 2907870

  However, after the control unit outputs a start signal after determining that it is a legitimate user based on bidirectional communication with the portable transmitter / receiver, the control unit is In the case of the one disclosed in Patent Documents 1 and 2 described above, it is considered that the operation of the vehicle is undesirably stopped due to the reset of the control unit.

  The present invention has been made in view of such circumstances, and even if an abnormality occurs in the control unit after determining that the user is a regular user and outputting a start signal, the operation of the vehicle is undesirably stopped. An object of the present invention is to provide an anti-theft device for a vehicle with an engine that prevents the vehicle from slipping.

  In order to achieve the above object, the present invention determines whether or not the user is a legitimate user based on the two-way communication between the portable transmitter / receiver carried by the vehicle user and the portable transmitter / receiver. And a control unit mounted on the vehicle so as to output a start signal for conducting electrical equipment necessary for the operation of the vehicle to the power source in accordance with the start operation after determining and being determined to be an authorized user. The anti-theft device for a vehicle with an engine includes a self-holding circuit that holds a state in which the electric device is connected to a power source until a stop operation is performed after a start signal is output from the control unit.

  According to the above configuration of the present invention, after the control unit determines that the user is a legitimate user based on bidirectional communication with the portable transmitter / receiver and outputs a start signal, the control unit has an abnormality. Even if it occurs, the self-holding circuit holds the state where the electrical equipment necessary for the operation of the vehicle is conducted to the power supply until the stop operation is performed, so that the operation of the vehicle is prevented from stopping undesirably. be able to.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 6 show an embodiment of the present invention. FIG. 1 is a side view of a vehicle for traveling on rough terrain, FIG. 2 is an enlarged view taken along arrow 2 in FIG. 1, and FIG. 3 is a portable transmitter / receiver. 4 is a diagram showing the configuration of the control system, FIG. 5 is a flowchart showing the control procedure when the engine is started, and FIG. 6 is a flowchart showing the control procedure when the engine is stopped.

  First, in FIG. 1, a pair of left and right front wheels WF to which a low-pressure balloon tire having a relatively large diameter is mounted is suspended at a front portion of a vehicle body frame 11 included in a rough terrain vehicle that is a vehicle with an engine. A pair of left and right rear wheels WR to which a low-pressure balloon tire having a relatively large diameter is mounted is suspended from the rear portion of the vehicle body frame 11.

  The vehicle body frame 11 is configured by joining a plurality of types of steel materials by welding or the like, and includes an engine E and a transmission (not shown) built in the crankcase 12 of the engine E. The power unit P is mounted on the vehicle body frame 11 between the front wheels WF ... and the rear wheels WR ..., and the front wheels WF ... and the rear wheels WR ... are rotationally driven by the power unit P.

  A fuel tank 13 is mounted on the body frame 11 above the power unit P, and a riding seat 14 is disposed behind the fuel tank 13.

  The entire vehicle body frame 11 is covered with a vehicle body cover 15 together with the power unit P, the fuel tank 13 and the like, and the riding seat 14 is supported by the vehicle body frame 11 so as to be able to rotate so as to lift the rear part upward. Is done.

  Referring also to FIG. 2, the central portion of the bar-shaped steering handle 16 that is supported so as to be steerable at the front end of the vehicle body frame 11 is covered with the handle cover 17 and protrudes left and right from the handle cover 17. Grips 18 and 19 are provided at both ends of the steering handle 16, and a start switch 20 is disposed in the vicinity of the right grip 18 so that the right hand holding the right grip 18 can be operated.

  Further, the handle cover 17 includes a meter unit 21 disposed at the center thereof, a liquid crystal display unit 22 disposed below the meter unit 21, a light emitting diode 23, a liquid crystal display unit 22, and a light emitting diode 23. A stop switch 24 disposed on the right side is disposed, and a pocket 25 is provided in the handle cover 17 on the left side of the liquid crystal display unit 22 and the light emitting diode 23.

  By the way, in this rough terrain vehicle, the engine E can be started in a state in which a user carrying the portable feeding / receiving device 26 shown in FIG. A control that determines whether or not the user is a regular user based on bidirectional communication with the receiver 26 and starts the engine E in response to a start operation after determining that the user is a regular user. A unit 30 is disposed on the vehicle body frame 11 below the riding seat 14, and the vehicle body frame 11 below the riding seat 14 has a boarding detection switch for detecting seating on the riding seat 14. 28 is attached.

  The portable transmitter / receiver 26 is capable of receiving a request signal from the control unit 30 and transmitting a specific password according to the reception of the request signal. A case 27 having a storable shape is provided, and a battery (not shown) is built in the case 27.

  On one surface of the case 27 of the portable transmitter / receiver 26, an on / off switch 31 for switching the portable transmitter / receiver 26 itself on and off, and a lighting state according to the operation of the on / off switch 31 are displayed. A display lamp 32 for switching, an answerback switch 33 for transmitting a rescue signal in the event of a vehicle detection or trouble in a parking lot, and a display lamp 34 for switching the lighting state according to the operation of the answerback switch 33 And a display lamp 35 for switching the lighting state depending on the remaining amount of the built-in battery, and each of the display lamps 32, 34, 35 is formed of a light emitting diode.

  In FIG. 4, an LF antenna for transmitting a request signal to the portable transmitter / receiver 26 and an RF receiver for receiving a password code from the portable transmitter / receiver 26 are provided on the substrate of the control unit 30. Signals from the start switch 20 and the boarding detection switch 28 are input to the control unit 30. Further, a buzzer 36, a liquid crystal display unit 22, a brake lamp 37 and a head lamp 38 are connected to the control unit 30. Thus, when the control unit 30 determines that the user is an authorized user based on the two-way communication with the portable transmitter / receiver 26, the control unit 30 displays “WELCOME” on the liquid crystal display unit 22, for example. When the answerback switch 33 is operated on the portable transmitter / receiver 26 side, the brake lamp 37 and the headlamp 38 are blinked and the buzzer 36 is sounded.

  The control unit 30 can detect the fall of the portable transmitter / receiver 26 from the pocket 25 by performing bidirectional communication with the portable transmitter / receiver 26 at predetermined time intervals, for example. At the time of detection, the control unit 30 causes the buzzer 36 to beep.

  Further, the control unit 30 is an authorized user based on two-way communication with the portable transmitter / receiver 26 that is triggered by the fact that the boarding detection switch 28 detects sitting on the boarding seat 14. In response to the start operation after the determination, the ignition device 40 that is an electrical device necessary for the operation of the rough terrain vehicle and the electrical signal 41 other than the ignition device are output to the battery 42 that is the power source. It has an output terminal 43, and the continuity state of the ignition device 40 and the electric device 41 to the battery 42 is a self-holding circuit until a stop operation is performed by the stop switch 24 after the start signal is output from the output terminal 43. 44.

  The self-holding circuit 44 constitutes the first relay R1 together with the first resistor 45 and the first relay coil 46 connected in series between the output terminal 43 of the control unit 30 and the ground, and the first relay coil 46. A first relay switch 47 provided between the battery 42 and the ignition device 40, a second resistor 48 provided between the first resistor 45 and the first relay coil 46, and between the first relay switch 47 and the ignition device 40, A second relay coil 49 provided between the first resistor 45 and the ground, a second relay switch 50 provided between the battery 42 and the electric device 41 so as to constitute the second relay R2 together with the second relay coil 49, and 1 between the resistor 45 and the second relay coil 49 and between the second relay switch 50 and the electric device 41. A third resistor 52, a third relay coil 53 and a stop switch 24 connected in series between the connection point 51 of the second resistor 48 between the first relay switch 47 and the ignition device 40 and the ground, and a third relay A third relay R3 is provided between the first resistor 45 and the ground so as to constitute the third relay R3 together with the coil 53, and the second resistor 48 is connected between the first relay switch 47 and the ignition device 40. The point 51 is grounded via the fourth resistor 55 and the light emitting diode 23 connected in series. The connection point 51 is connected to the control unit 30 in order to detect the potential of the connection point 51.

  In such a self-holding circuit 44, a high level is output from the output terminal 43 for a certain period of time in response to a start operation after determining that the user is an authorized user based on bidirectional communication with the portable transmitter / receiver 26. When the start signal is output, the first and second relay coils 46 and 49 are energized, whereby the first and second relay switches 47 and 50 are turned on, and the ignition device 40 and the electric device 41 are connected to the battery 42 from the battery 42. While the electric power is supplied and the current from the connection point 51 flows through the first and second relay coils 46 and 49, the conduction state of the first and second relay switches 47 and 50 is maintained. Further, in a state where power is supplied from the battery 42 to the ignition device 40 and the electric device 41, a current flows through the light emitting diode 23, thereby turning on the light emitting diode 23.

  When the stop switch 24 is turned on while power is being supplied from the battery 42 to the ignition device 40 and the electric device 41, the third relay coil 53 is turned on, and the third relay switch 54 is turned on accordingly. Between the first resistor 45 and the first relay coil 46 and between the first resistor 45 and the second relay coil 49 are grounded, the first and second relay switches 47 and 50 are cut off, and the ignition device 40 In addition, power supply from the battery 42 to the electric device 41 is cut off. At this time, since the potential of the connection point 51 also decreases, the control unit 30 can determine that the stop operation by the stop switch 24 has been performed.

  The control unit 30 executes processing according to the procedure shown in FIG. 5 when the engine is started. First, in step S1, the boarding detection switch 28 detects whether or not the user is sitting on the boarding seat 14, and the boarding is performed. When it is confirmed, the ID is verified in two-way communication with the portable transmitter / receiver 26 in step S2, and when the ID is verified and it is confirmed in step S3 that the user is an authorized user, the process starts in step S4. Start the switch input wait timer.

  The start switch input waiting timer counts a predetermined time, for example, 20 seconds. When it is confirmed in step S5 that the start switch 20 has not been operated before the predetermined time elapses, collation is performed in step S6. Reset the result. That is, if the start operation is not executed within a predetermined time after determining that the user is a regular user, the determination that the user is a regular user is invalidated.

  If the predetermined time has not elapsed in step S5, the process proceeds to step S7 to determine whether or not the start operation by the start switch 20 has been performed. If the start operation has not been performed, the process returns to step S5 and the start operation is performed. If it is confirmed, the process proceeds to step S8.

  In step S8, the ID is verified by two-way communication with the portable transmitter / receiver 26. When the ID is verified and it is confirmed in step S9 that the user is an authorized user, a start signal is output in step S10. To do.

  Further, the control unit 30 executes processing in accordance with the procedure shown in FIG. 6 when the engine is stopped. In step S11, it is determined whether or not a stop operation has been performed by the stop switch 24. The power supply to the ignition device 40 and the electric device 41 is cut off by proceeding and releasing the self-holding state by the self-holding circuit 44.

  In the next step S13, a restart timer is started. The restart timer counts a predetermined time, for example, 20 seconds, and outputs a start signal in step S16 when it is confirmed in step S15 that the start switch 20 has been operated until the predetermined time elapses. To do. That is, when the engine is stopped, if the start switch 20 is not pressed until a predetermined time (20 seconds) has elapsed since the engine stopped, the engine will not be restarted as it is, and after the predetermined time has elapsed. The control unit 30 executes a process according to the engine starting procedure shown in FIG.

  Next, the operation of this embodiment will be described. The control unit 30 is bidirectional with the portable transmitter / receiver 26 that is triggered by the fact that the boarding detection switch 28 detects sitting on the riding seat 14. It is determined whether or not the user is a regular user based on communication, and the engine E is started in response to a start operation after determining that the user is a regular user, but is determined to be a regular user. When the start operation is not executed within a predetermined time later, the determination that the user is an authorized user is invalidated, so when the user leaves the rough terrain vehicle after being determined to be an authorized user. In addition, even if a third party performs a start operation after the predetermined time has elapsed, the engine E will not start undesirably, and a better antitheft effect can be obtained.

  Further, until the stop operation is performed after the start signal is output from the control unit 30, the state where the ignition device 40 and the electric device 41 are electrically connected to the battery 42 is held by the self-holding circuit 44. It is possible to prevent the operation of the leveling vehicle from stopping undesirably.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

It is a side view of the vehicle for rough terrain travel. FIG. 2 is an enlarged view taken along arrow 2 in FIG. 1. It is a perspective view of a portable transmitter / receiver. It is a figure which shows the structure of a control system. It is a flowchart which shows the control procedure at the time of engine starting. It is a flowchart which shows the control procedure at the time of an engine stop.

Explanation of symbols

26 ... portable transmitter / receiver 30 ... control unit 40 ... ignition device 41 as an electric device ... electric device 42 ... battery 44 as a power source ... self-holding circuit

Claims (1)

  It is determined whether or not the vehicle is a legitimate user based on bidirectional communication between the portable transmitter / receiver (26) carried by the vehicle user and the portable transmitter / receiver (26). A control unit (30) mounted on the vehicle so as to output a start signal for conducting the electrical equipment (40, 41) necessary for the operation of the vehicle to the power source according to the start operation after determining that the vehicle is a person In a vehicle antitheft device with an engine, the electric device (40, 41) is kept in electrical connection with a power source (42) until a stop operation is performed after a start signal is output from the control unit (30). An anti-theft device for a vehicle with an engine, comprising a self-holding circuit (44).

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