JP2020011550A - Drunk-driving prevention device and control method for the same - Google Patents

Abstract

To provide a drunk-driving prevention device capable of improving convenience when a user starts an engine while preventing drunk-driving and a control method for the drunk-driving prevention device.SOLUTION: A drunk-driving prevention device related to one embodiment of this invention includes: a drinking determination section for determining an implementation status of alcohol inspection using an alcohol sensor mounted to a vehicle by a driver; and a vehicle apparatus control section for starting an engine regardless of the state of the alcohol inspection when a starting operation of the engine of the vehicle is detected and stopping the engine on the basis of the state of the alcohol inspection when an operation of the vehicle apparatus indicating driving intention of the driver is detected after starting of the engine .SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drunk driving prevention device and a control method thereof.

  BACKGROUND ART In recent years, in-vehicle drunk driving prevention devices for preventing drunk driving have been developed by domestic and foreign automobile manufacturers and automobile component manufacturers.

  For example, Patent Literature 1 discloses a drunk driving prevention system that includes an alcohol sensor for performing a driver's alcohol test and that prohibits the driver from driving a vehicle when alcohol exceeding a reference value is detected. Has been described. Accordingly, in the drunk driving prevention system described in Patent Literature 1, since the driver is required to pass the alcohol test in order to drive the vehicle, the driving of the vehicle by the drunk driver is not required. Is prevented.

  Further, the drunk driving prevention system described in Patent Literature 1 is operated to start an engine for the purpose of using an air conditioner or the like for a driver to relax in a vehicle regardless of a result of an alcohol test. It has a switch. As a result, in the drunk driving prevention system described in Patent Literature 1, the alcohol test is not obligatory to idle the engine for purposes other than driving the vehicle, so that the convenience for the driver is improved.

JP 2009-1101 A

  However, in the drunk driving prevention system described in Patent Literature 1, in addition to a normal engine start switch operated to drive the vehicle, an idling switch operated by the driver to relax in the vehicle needs to be newly provided. Therefore, the parts cost increases. Patent Document 1 proposes that an idling switch is substituted for an existing air conditioner switch or the like in order to avoid an increase in component costs. However, when a plurality of functions are assigned to one switch, the operation and state of the switch become complicated, and the convenience when the user starts the prime mover is impaired.

  Therefore, an object of the present invention is to provide a drunk driving prevention device capable of improving convenience when a user starts a motor while preventing drunk driving, and a control method thereof.

  The drunk driving prevention device according to one embodiment of the present invention determines the implementation status of an alcohol test by a driver using an alcohol sensor mounted on a vehicle, and when the driver has already performed the alcohol test, Based on the alcohol concentration measured for the driver in the inspection, an alcohol determination unit that determines whether the driver is in a state in which the driver can drive the vehicle, and when a start operation of the motor of the vehicle is detected, the state of the alcohol inspection is changed. Regardless of starting the prime mover and detecting operation of the vehicle equipment indicating the driver's driving intention after starting the prime mover, a vehicle equipment control unit that determines whether to stop the prime mover based on the state of the alcohol test, Prepare.

  The control method of the drunk driving prevention device according to one embodiment of the present invention determines the implementation status of the alcohol test by the driver using the alcohol sensor mounted on the vehicle, and the driver has already performed the alcohol test. A step of determining whether or not the driver is in a state in which the driver can drive the vehicle based on the alcohol concentration measured for the driver in the alcohol test; and Irrespective of the conditions, the method further comprises a step of starting the prime mover and determining whether to stop the prime mover based on the state of the alcohol test, when detecting an operation of the vehicle equipment indicating the driver's driving intention after the start of the prime mover.

  ADVANTAGE OF THE INVENTION According to this invention, the drunk driving prevention apparatus which can improve the convenience at the time of a user starting a motor while preventing drunk driving, and its control method are provided.

1 is a block diagram illustrating a configuration of a drunk driving prevention device according to a first embodiment, together with a configuration of a vehicle equipped with the device. It is a timing chart of a state change of a vehicle and its vehicle equipment when a driver who does not drink starts a motor and tries to drive a vehicle after performing an alcohol test. It is a timing chart of a state change of a vehicle and its vehicle equipment when a drunk driver tries to drive a vehicle after starting a motor and performing an alcohol test. 6 is a timing chart of a state change of the vehicle and its vehicle equipment when a driver who is not drunk starts the prime mover and tries to drive the vehicle during an alcohol test. It is a timing chart of a state change of a vehicle and its vehicle equipment when a drunk driver starts a motor and tries to drive a vehicle during an alcohol test. It is a flowchart which shows the starting process of the prime mover in the control method of the drunk driving prevention device according to the first embodiment. It is a flowchart which shows the shift process of the shift operation part in the control method of the drunk driving prevention device which concerns on 1st Embodiment. It is a block diagram showing composition of a drunk driving prevention device concerning a 2nd embodiment with composition of a vehicle carrying it.

  The drunk driving prevention device of the present invention, upon detecting a start operation of a motor of a vehicle, starts the motor regardless of a state of an alcohol test. Thereafter, when detecting the operation of the vehicle device indicating the driver's driving intention, the drunk driving prevention device determines whether to stop the prime mover based on the state of the alcohol test.

  With this, when the driver wants to idle the prime mover for the purpose of using the air conditioner or the like to relax in the vehicle, the driver operates the start switch of the prime mover of the vehicle without performing the alcohol test. The prime mover can be started. For this reason, convenience when the user starts the prime mover is improved. In addition, when the driver who is drunk operates the vehicle equipment that indicates the driver's intention to drive, the drunk driving prevention device stops the prime mover as necessary based on the driver's alcohol test state. Driving is prevented.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments, and can be appropriately changed without departing from the gist of the present invention. In each drawing, components having the same or corresponding functions are denoted by the same reference numerals, and description thereof may be omitted or simplified.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a drunk driving prevention device 1 according to the first embodiment together with a configuration of a vehicle 2 on which the device is mounted. The vehicle 2 includes vehicle devices such as a drunk driving prevention device 1, an alcohol sensor 11, a prime mover 20, a starter motor 21, a start switch 22, a shift operation unit 30, and an air conditioner 40.

  The drunk driving prevention device 1 can be, for example, an ECU (Engine Control Unit) of the vehicle 2. The drunk driving prevention device 1 includes a control unit 10. The control unit 10 is connected to the above-described vehicle devices via an in-vehicle LAN or the like.

  The control unit 10 includes a drinking determination unit 101 and a vehicle device control unit 102. The control unit 10 can be a processor that executes a program for control and calculation performed by the drinking determination unit 101 and the vehicle device control unit 102. In this case, the drinking determination unit 101 and the vehicle device control unit 102 are realized, for example, as software modules or firmware executed by the control unit 10.

  Alternatively, the control unit 10 may be configured by an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). In this case, the drinking determination unit 101 and the vehicle device control unit 102 are realized as a logic circuit formed in an FPGA or an ASIC.

  The control and calculation performed by the drinking determination unit 101 and the vehicle device control unit 102 of the control unit 10 will be described later with reference to FIGS.

  The alcohol determination unit 101 determines the implementation status of the alcohol test using the alcohol sensor 11 and, when the driver has already performed the alcohol test, based on the alcohol concentration measured for the driver in the alcohol test. It is determined whether the user is in a state in which the vehicle 2 can be driven. Then, the driver's alcohol inspection state is determined to be one of the following: unexecuted, ongoing, driving allowed, and driving disabled.

  The vehicle device control unit 102 controls vehicle devices such as the prime mover 20, the starter motor 21, the shift operation unit 30, and the air conditioner 40 according to the driver's alcohol inspection state.

  The alcohol sensor 11 is operated by the driver, measures the alcohol concentration in the driver's breath or blood, and outputs the measured alcohol concentration to the control unit 10. For example, the alcohol sensor 11 is arranged around the driver's seat, and measures the concentration of alcohol in the breath that the driver has blown into the blowing port of the alcohol sensor 11. In this case, the alcohol sensor 11 irradiates light to the breath blown into the blowing port, and measures the alcohol concentration in the breath of the driver based on the amount of light absorbed by the alcohol component in the breath. .

  Alternatively, the alcohol sensor 11 may be disposed on a grip portion of the steering and measure the alcohol concentration in the blood flowing through the finger of the driver holding the steering. In this case, the alcohol sensor 11 irradiates light to the driver's finger, and measures the alcohol concentration in the driver's breath based on the amount of light absorbed by the alcohol component in the blood flowing through the finger blood vessel. Measure.

  Further, the alcohol sensor 11 outputs to the control unit 10 a signal indicating that the driver is performing the alcohol test. For example, the alcohol sensor 11 has a button operated by a driver performing an alcohol test, and when this button is pressed, controls a signal indicating that the driver is performing the alcohol test. Output to the unit 10.

  Alternatively, in the case where the alcohol sensor 11 measures the alcohol concentration in the breath of the driver, the alcohol sensor 11 performs the alcohol test when the breath pressure blown into the air inlet is equal to or higher than a predetermined reference value. May be output.

  The prime mover 20 may be an engine that generates torque for running the vehicle 2. In the prime mover 20, the fuel injection amount and the ignition timing of the combustion chamber are controlled by the control unit 10, and the torque and the rotation speed are controlled. At this time, the prime mover 20 is feedback-controlled by the control unit 10 so that the measured value of the rotational speed of the prime mover 20 measured by the rotational speed sensor installed on the prime mover 20 follows the target value. The control unit 10 can know whether the prime mover 20 is operating or stopped from the rotational speed of the prime mover 20 output from the rotational speed sensor of the prime mover 20.

  The starter motor 21 assists in starting the prime mover 20 by using electric power supplied from a battery (not shown).

  The start switch 22 is operated by the driver, and outputs a start signal for starting the prime mover 20 to the control unit 10. The control unit 10 that has received the start signal from the start switch 22 starts the prime mover 20 using the starter motor 21 as necessary. The start switch 22 generally has two states of an on state and an off state. During a start operation by the driver, the start switch 22 is turned on to output a start signal, and otherwise, is turned off and outputs a start signal. do not do.

  The start switch 22 can be, for example, a starter switch provided on an ignition key cylinder of the vehicle 2. When the driver inserts the engine key into the ignition key cylinder of the vehicle 2 and turns it to turn on the ignition, and further turns, the starter switch is turned on, and the starter switch outputs a start signal to the control unit 10. Alternatively, the start switch 22 can be a power switch of the vehicle 2. When the driver turns on the power switch, the power switch outputs a start signal to the control unit 10.

  The shift operation unit 30 is operated by a driver to shift the range state of a transmission such as a gear and a clutch for transmitting the torque generated by the prime mover 20 to the axle of the vehicle 2. The shift operation unit 30 can be, for example, a shift lever of the vehicle 2. The driver can drive the vehicle 2 by starting the motor 20 and then shifting the shift operation unit 30 to the travel range.

  For example, when the vehicle 2 is an AT (Automatic Transmission) vehicle, a general shift lever has at least a range state of D (Drive), R (Reverse), N (Neutral), and P (Parking). The D range and the R range are driving ranges for the driver to drive the vehicle 2 forward and backward, respectively. The N range is a non-traveling range where the clutch is disengaged and torque of the prime mover 20 is not transmitted to the axle. The P range is a non-traveling range when the driver parks the vehicle 2. In a general AT vehicle, starting of the prime mover 20 is permitted only when the shift operation unit 30 is in the non-traveling range so that the vehicle 2 does not suddenly start. The range state of the shift operation unit 30 is output to the control unit 10.

  The air conditioner 40 performs air conditioning of the vehicle interior. The compressor of the air conditioner 40 uses the torque generated by the prime mover 20 when cooling and heating the cabin. When the air conditioner 40 heats the vehicle interior, the exhaust heat of the prime mover 20 is used. Therefore, in order to use the air conditioner 40, the prime mover 20 needs to operate.

  FIGS. 2 and 3 are timing charts showing an example of a state change of the vehicle 2 on which the drunk driving prevention device 1 according to the first embodiment is mounted and the vehicle equipment thereof. FIG. 2 shows, in order from the top, a state 201 of the start switch 22, a state 202 of the prime mover 20, a state 203 of the alcohol test, a state 204 of the shift operation unit 30, and a state 205 of permitting the driving of the vehicle 2. FIG. 3 shows, in order from the top, a state 301 of the start switch 22, a state 302 of the prime mover 20, a state 303 of the alcohol test, a state 304 of the shift operation unit 30, and a state 305 of permitting operation of the vehicle 2. I have. The horizontal axes in FIGS. 2 and 3 indicate time.

  FIG. 2 shows a timing chart of a state change of the vehicle 2 and its vehicle equipment when the driver who is not drinking starts the motor 20 and tries to drive the vehicle 2 after performing the alcohol test. At time t1, when the start switch 22 is turned on by the driver, the vehicle device control unit 102 starts the motor 20 regardless of the driver's alcohol inspection state.

  At time t2, the driver starts performing the alcohol test using the alcohol sensor 11, and ends the alcohol test at time t3. Then, at the time t3 when the driver finishes the alcohol test, the alcohol determination unit 101 performs the alcohol determination of the driver based on the measured value of the alcohol concentration of the driver output from the alcohol sensor 11. In the case of FIG. 2, the measured value of the alcohol concentration of the driver who is not drinking is less than a predetermined reference value which is the upper limit of the alcohol concentration at which the driver can drive the vehicle 2. Determines that the driver is in the alcohol test state. As a result, the vehicle device control unit 102 permits the driver to drive the vehicle 2.

  At this time, the vehicle device control unit 102 may display on the instrument panel of the vehicle 2 or the display of the car navigation to notify the driver that the driving of the vehicle 2 is permitted.

  Thereafter, at time t4, the driver operates the shift operation unit 30 to drive the vehicle 2 by shifting the state of the shift lever from the non-travel range to the travel range, for example.

  On the other hand, FIG. 3 shows a timing chart of a state change of the vehicle 2 and its vehicle equipment when the drunk driver starts the prime mover 20 and tries to drive the vehicle 2 after performing the alcohol test. I have. The operation up to time t2 is the same as that in FIG.

  At time t3, the driver ends the alcohol test. In the case of FIG. 3, the measured value of the alcohol concentration of the driver who is drinking becomes equal to or more than a predetermined reference value, and the drinking determination unit 101 determines that the driver has not tested the alcohol test state. As a result, the vehicle device control unit 102 prohibits the driver from driving the vehicle 2.

  At this time, the vehicle device control unit 102 may display the fact that the driving of the vehicle 2 is prohibited on the instrument panel of the vehicle 2 or the display of the car navigation to notify the driver.

  Thereafter, at time t4, the driver operates the shift operation unit 30 to shift the state of the shift lever from the non-traveling range to the traveling range, for example, to indicate the driving intention of the vehicle 2. When detecting the operation of the vehicle device indicating the driver's driving intention, the vehicle device control unit 102 stops the motor 20 so that the driver cannot drive the vehicle 2.

  FIGS. 4 and 5 are timing charts showing another example of a state change of the vehicle 2 on which the drunk driving prevention device 1 according to the first embodiment is mounted and the vehicle equipment thereof. FIG. 4 shows, in order from the top, a state 401 of the start switch 22, a state 402 of the prime mover 20, a state 403 of the alcohol test, a state 404 of the shift operation unit 30, and a state 405 of permitting operation of the vehicle 2. In addition, FIG. 5 shows, in order from the top, a state 501 of the start switch 22, a state 502 of the prime mover 20, a state 503 of the alcohol test, a state 504 of the shift operation unit 30, and a state 505 of permission for driving the vehicle 2. I have. The horizontal axes in FIGS. 4 and 5 indicate time.

  FIG. 4 shows a timing chart of a state change of the vehicle 2 and its vehicle equipment when the driver who is not drinking starts the motor 20 and tries to drive the vehicle 2 during the alcohol test. The operation up to time t2 is the same as that in FIG.

  At time t3, the driver operates the shift operation unit 30 during the execution of the alcohol test, and attempts to drive the vehicle 2 by shifting the state of the shift operation unit 30 from the non-travel range to the travel range. Then, the vehicle equipment control unit 102 keeps the motor 20 running so that the torque of the motor 20 is not transmitted to the axle or the motor 20 does not generate torque until the driver's alcohol test is completed. I do.

  At time t4, the driver ends the alcohol test. In the case of FIG. 4, the measured value of the alcohol concentration of the driver who is not drinking becomes less than the predetermined reference value, and the drinking determination unit 101 determines that the driver is in the alcohol test state. As a result, the vehicle equipment control unit 102 permits the driver to drive the vehicle 2 so that the torque from the prime mover 20 is transmitted to the axle or the prime mover 20 generates the torque.

  At this time, if the state of the shift operation unit 30 is in the running range, the vehicle 2 may suddenly start. For this reason, the vehicle device control unit 102 may forcibly shift the physical state of the shift operation unit 30 to the N range in which the torque of the prime mover 20 is not transmitted to the axle. Thereafter, the driver drives the vehicle 2.

  In this way, by keeping the motor 20 running until the driver's alcohol test is completed, the driver who is not in a drunk state can save the trouble of restarting the motor 20 to drive the vehicle 2 thereafter. , The convenience for the driver is improved. Further, since the number of times that the motor 20 is stopped or started is reduced, the life of the starter motor 21, the motor 20, and the battery that is the power supply source of the starter motor 21 is extended.

  At time t3, the vehicle device control unit 102 physically locks the shift operation of the shift operation unit 30 instead of cutting off the torque of the prime mover 20 and prohibits the shift lever from shifting to the travel range. You may. In this case, the same effect can be obtained. For this purpose, for example, a shift lock function of a shift lever of a general vehicle 2 is used. In this case, after permitting the operation of the vehicle 2, the vehicle device control unit 102 unlocks the shift operation of the shift operation unit 30 and permits the shift of the shift lever to the travel range.

  On the other hand, FIG. 5 shows a timing chart of a change in the state of the vehicle 2 and its vehicle equipment when the drunk driver starts the prime mover 20 and tries to drive the vehicle 2 during the alcohol test. I have. The operation up to time t2 is the same as that in FIG.

  At time t3, the driver operates the shift operation unit 30 during the execution of the alcohol test, and attempts to drive the vehicle 2 by shifting the state of the shift operation unit 30 from the non-travel range to the travel range. Then, the vehicle equipment control unit 102 keeps the motor 20 running so that the torque of the motor 20 is not transmitted to the axle or the motor 20 does not generate torque until the driver's alcohol test is completed. I do.

  At time t4, the driver ends the alcohol test. In the case of FIG. 5, the measured value of the alcohol concentration of the driver who is drinking becomes equal to or more than a predetermined reference value, and the drinking determination unit 101 determines that the driver's alcohol inspection state is not driving. As a result, the vehicle device control unit 102 prohibits the driver from driving the vehicle 2, stops the motor 20, and prevents the driver from driving the vehicle 2.

  FIG. 6 is a flowchart illustrating a start process of the prime mover 20 in the control method of the drunk driving prevention device 1 according to the first embodiment. With reference to FIG. 6, the starting process of the prime mover 20 at the time t1 on the timing charts shown in FIGS. 2 to 5 will be described in detail. A description of the same contents as those in FIGS. 2 to 5 may be omitted.

  The drinking determination unit 101 determines whether or not the driver is performing an alcohol test using the alcohol sensor 11 (step S601). When the driver is performing the alcohol test (step S601: Yes), the alcohol drinking determination unit 101 waits until the driver finishes the alcohol test.

  Next, the drinking determination unit 101 determines whether or not the driver has already performed an alcohol test (step S602).

  When the driver has not performed the alcohol test (step S602: No), the vehicle device control unit 102 determines whether the state of the shift operation unit 30 is the travel range (step S603). When the shift operation unit 30 is in the travel range (Step S603: Yes), the vehicle device control unit 102 ends the start-up process of the prime mover 20 with the prime mover 20 stopped so that the vehicle 2 does not suddenly start.

  When the driver has already performed the alcohol test (step S602: Yes), the alcohol determination unit 101 changes the driver's alcohol test state based on the measured value of the driver's alcohol output from the alcohol sensor 11. It is determined whether or not it is possible (step S604).

  When the driver's alcohol inspection state indicates that driving is not possible (step S604: No), the vehicle device control unit 102 prohibits the driver from driving the vehicle 2 (step S605), and keeps the motor 20 stopped. The starting process of the prime mover 20 ends.

  On the other hand, when the driver's alcohol inspection state indicates that driving is possible (step S604: Yes), the vehicle device control unit 102 permits the driver to drive the vehicle 2 (step S606).

  When the driving of the vehicle 2 is permitted, or when the driver has not performed the alcohol test and the shift operation unit 30 is in the non-traveling range (step S603: No), the vehicle device control unit 102 performs the starting operation of the prime mover 20. It is determined whether or not has been performed (step S607). The vehicle device control unit 102 repeats step S607 until the start operation of the prime mover 20 is performed. When the start operation of the prime mover 20 is performed (step S607: Yes), the vehicle device control unit 102 starts the prime mover 20 (step S608), and ends the start processing of the prime mover 20.

  FIG. 7 is a flowchart illustrating a shift process of the shift operation unit 30 in the control method of the drunk driving prevention device 1 according to the first embodiment. The shift process of the shift operation unit 30 at the time t4 on the timing charts shown in FIGS. 2 and 3 (or the time t3 on the timing charts shown in FIGS. 4 and 5) will be described in detail with reference to FIG. . A description of the same contents as those in FIGS. 2 to 5 may be omitted.

  First, the prime mover 20 of the vehicle 2 is started according to the flowchart shown in FIG. 6 (step S701).

  Thereafter, the vehicle device control unit 102 determines whether an operation of the vehicle device indicating the driver's driving intention, for example, an operation of the shift lever is detected (step S702). The vehicle device control unit 102 repeats step S702 until the operation of the vehicle device indicating the driver's driving intention is detected.

  When the operation of the vehicle device indicating the driver's driving intention is detected (Step S702: Yes), the alcohol drinking determination unit 101 determines whether or not the driver is performing the alcohol test using the alcohol sensor 11 (Step S702). Step S703).

  When the driver is performing the alcohol test (Step S703: Yes), the vehicle device control unit 102 determines whether the state of the shift operation unit 30 is the travel range (Step S704). When the shift operation unit 30 is in the travel range (step S704: Yes), the vehicle device control unit 102 keeps the motor 20 running so that the torque of the motor 20 is not transmitted to the axle, or the motor 20 It does not occur (step S705). The vehicle device control unit 102 repeats steps S703 to S705 until the alcohol test of the driver is completed.

  Next, the drinking determination unit 101 determines whether the driver has already performed the alcohol test (step S706).

  When the driver has already performed the alcohol test (step S706: Yes), the alcohol determination unit 101 changes the driver's alcohol test state to the driving state based on the measured value of the driver's alcohol concentration output from the alcohol sensor 11. It is determined whether the operation is possible or not (step S707).

  When the driver's alcohol inspection state indicates that driving is possible (Step S707: Yes), the vehicle device control unit 102 permits the driver to drive the vehicle 2 (Step S708), and performs the shift operation process of the shift operation unit 30. To end.

  On the other hand, when the driver's alcohol test state is incapable of driving (step S707: No) or when the driver has not performed the alcohol test (step S706: No), the vehicle device control unit 102 determines that the driver 2 is prohibited (step S709). Then, the vehicle device control unit 102 stops the prime mover 20 (step S710), and ends the shift operation processing of the shift operation unit 30. As a result, the driving of the vehicle 2 by the driver in the drinking state is prevented.

  As described above, the drunk driving prevention device of the present embodiment starts the prime mover regardless of the state of the alcohol test when detecting the start operation of the prime mover of the vehicle. Thereafter, when detecting the operation of the vehicle device indicating the driver's driving intention, the drunk driving prevention device determines whether to stop the prime mover based on the state of the alcohol test.

  With this, when the driver wants to idle the prime mover for the purpose of using the air conditioner or the like to relax in the vehicle, the driver operates the start switch of the prime mover of the vehicle without performing the alcohol test. The prime mover can be started. For this reason, convenience when the user starts the prime mover is improved. In addition, when the driver who is drunk operates the vehicle equipment that indicates the driver's intention to drive, the drunk driving prevention device stops the prime mover as necessary based on the driver's alcohol test state. Driving is prevented. In addition, since the number of times that the motor is started and stopped is reduced, the life of the starter motor, the motor, and the battery that is the power supply source of the starter motor is extended.

[Second embodiment]
FIG. 8 is a block diagram showing a configuration of the drunk driving prevention device 1 according to the second embodiment, together with a configuration of a vehicle 2b equipped with the device. The drunk driving prevention device 1 of the present embodiment differs from the first embodiment in that the prime mover 20b is a motor. Other points are the same as those of the first embodiment, and therefore, the points different from the first embodiment will be described.

  The vehicle 2b includes vehicle devices such as the drunk driving prevention device 1, the alcohol sensor 11, the prime mover 20b, the start switch 22, the shift operation unit 30, the air conditioner 40, the battery 50, and the power supply switch 51.

  The prime mover 20b is a motor that generates torque for driving the vehicle 2b. In the prime mover 20b, a switching element of an inverter for flowing a drive current to a motor coil is controlled by the control unit 10, and the torque and the rotation speed are controlled. At this time, the prime mover 20b is feedback-controlled by the control unit 10 so that the measured values of the torque and the rotational speed of the prime mover 20b measured by the current sensor and the rotational speed sensor installed on the prime mover 20b follow the target values. . The control unit 10 can know whether the prime mover 20b is operating or stopped based on the rotational speed of the prime mover 20b output from the rotational speed sensor of the prime mover 20b.

  The start switch 22 can be a power switch of the vehicle 2b. When the driver turns on the power switch, the power switch outputs a start signal to the control unit 10. The control unit 10 that has received the start signal from the start switch 22 turns on a power supply switch 51 described later. As a result, the prime mover 20b can be started, and the air conditioner 40 can be used.

  The shift operation unit 30 is operated by a driver to shift the range state of the torque and the number of revolutions of the prime mover 20b controlled by the control unit 10. The driver can drive the vehicle 2b by shifting the shift operation unit 30 to the travel range after starting the motor 20b.

  However, unlike the case where the prime mover 20 is an engine, the N range of the shift operation unit 30 when the prime mover 20b is a motor is different from the case where the prime mover 20 is an engine because the switching control of the inverter that generates the drive current flowing through the motor coil is stopped. , The prime mover 20b is not driven. The range state of the shift operation unit 30 is output to the control unit 10.

  The battery 50 supplies electric power for driving the prime mover 20b, and also supplies electric power for the air conditioner 40 to perform air conditioning in the passenger compartment.

  The power supply switch 51 is provided on a power line that connects the battery 50 with the prime mover 20b and the air conditioner 40, and is controlled by the control unit 10 to turn on and off power supply from the battery 50 to the prime mover 20b and the air conditioner 40. Switch. When the power supply switch 51 is turned on by the control unit 10, the prime mover 20b can be started and the air conditioner 40 can be used.

  As described above, even with the configuration in which the prime mover 20b is a motor, the same effect as the configuration in which the prime mover 20 of the first embodiment is an engine can be obtained. That is, when the driver wants to use the air conditioner 40 of the vehicle 2b, the driver operates the start switch 22 to turn on the power supply switch 51 without performing the alcohol test, and uses the prime mover 20b and the air conditioner 40. It can be in a possible state. Therefore, convenience when the user starts the prime mover 20b is improved. In addition, when the driver who is drunk operates the vehicle equipment indicating the driving intention of the vehicle 2b, the drunk driving prevention device 1 stops the motor 20b as necessary based on the state of the driver's alcohol test. Therefore, drunk driving is prevented.

  Each of the above-described embodiments is merely an example of an embodiment for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features.

  For example, according to another modification, the operation of the vehicle device indicating the driver's driving intention is not limited to the operation of the shift lever by the driver. The operation of the vehicle device indicating the driver's intention to drive may be, for example, an operation in which the driver turns the steering of the vehicle 2 by a predetermined angle or more, or an operation in which the driver puts his foot on the accelerator pedal of the vehicle 2. . Whether the driver has turned the steering of the vehicle 2 by a predetermined angle or more is determined based on the output value of an angle sensor provided on the steering rotation shaft of the vehicle 2. Whether the driver has put his foot on the accelerator pedal of the vehicle 2 is determined by the output value of a sensor that measures the amount of depression of the accelerator pedal or the throttle opening of the engine that opens and closes in conjunction with the amount of depression of the accelerator pedal. Is determined based on This makes it possible to detect the driver's driving intention in various ways and prevent drunk driving.

DESCRIPTION OF SYMBOLS 1 Drunk driving prevention device 2, 2b Vehicle 10 Control unit 11 Alcohol sensor 20, 20b Prime mover 21 Starter motor 22 Start switch 30 Shift operation unit (shift lever)
Reference Signs List 40 air conditioner 50 battery 51 power supply switch 101 drinking determination unit 102 vehicle device control unit

Claims (6)

While determining the implementation status of the alcohol test by the driver using the alcohol sensor mounted on the vehicle, when the driver has already performed the alcohol test, the alcohol concentration measured for the driver in the alcohol test A drinking determination unit that determines whether the driver is in a state in which the driver can drive the vehicle,
When the start operation of the motor of the vehicle is detected, the engine is started regardless of the state of the alcohol test, and when the operation of the vehicle device indicating the driver's driving intention is detected after the start of the motor, the operation of the alcohol test is performed. A vehicle equipment control unit that determines whether to stop the prime mover based on a state,
A drunk driving prevention device comprising: The vehicle equipment control unit, when detecting the operation of the shift lever indicating the driver's driving intention after starting the prime mover, stops the prime mover based on the state of the alcohol test,
The drunk driving prevention device according to claim 1. The alcohol determination unit, the state of the alcohol test, not performed, during execution, driving is possible, determined to be any one of the driving impossible,
The vehicle equipment control unit, when detecting the operation of the shift lever after the start of the prime mover, when the state of the alcohol test is not performed or can not be driven, to stop the prime mover,
The drunk driving prevention device according to claim 2. The vehicle equipment control unit, when detecting the shift operation of the shift lever to the travel range after the start of the prime mover and the state of the alcohol test is being performed, so that the torque of the prime mover is not transmitted to the axle, Alternatively, the motor is prevented from being driven, and when the state of the alcohol test is enabled after the shift operation is detected, the torque of the motor is transmitted to an axle, or the motor is driven. ,
The drunk driving prevention device according to claim 3. The vehicle equipment control unit, after detecting the operation of the shift lever after the start of the prime mover and the state of the alcohol test is in progress, prohibits the shift lever to shift to a travel range, the shift lever of the shift lever When the state of the alcohol test becomes operable after detecting the operation, the shift lever is allowed to shift to a travel range,
The drunk driving prevention device according to claim 3. While determining the implementation status of the alcohol test by the driver using the alcohol sensor mounted on the vehicle, when the driver has already performed the alcohol test, the alcohol concentration measured for the driver in the alcohol test Determining whether the driver is in a state in which the driver can drive the vehicle, based on
When the start operation of the motor of the vehicle is detected, the engine is started regardless of the state of the alcohol test, and when the operation of the vehicle device indicating the driver's driving intention is detected after the start of the motor, the operation of the alcohol test is performed. Determining whether to stop the prime mover based on a state,
A method for controlling a drunk driving prevention device, comprising:

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