JP5045573B2 - Drunk driving prevention device - Google Patents

Description

  The present invention relates to a drunk driving prevention apparatus for preventing drunk driving.

  In recent years, from the viewpoint of safe driving, research on drunk driving prevention devices that determine whether a driver is in a drunk state and permit the vehicle to run only when it is determined that the driver is not in a drunk state has been promoted. ing.

  As a method for determining whether or not the driver is in a drunk state, for example, an inspection device having an exhalation breathing port is arranged near the driver's seat so that the driver breathes in when the vehicle starts. It is conceivable to make a determination by comparing the concentration of an indicator component such as alcohol or acetaldehyde contained in exhaled breath with a determination threshold value.

It is a kind of such a device, the boarding detection means for detecting the boarding of the driver, the alcohol concentration detection means for detecting the alcohol concentration in the driver's breath, and when the boarding of the driver is detected by the boarding detection means, An invention relating to a drinking level detection device having a power supply unit that supplies power to an alcohol concentration detection unit and a determination unit that determines a drinking level of a driver based on a detection value from the alcohol concentration detection unit is disclosed. (For example, refer to Patent Document 1). In this document, a sensor for detecting opening / closing of a door, a seat belt switch, and a pressure sensor in the seat are cited as an example of the boarding detection means for detecting the boarding of the driver.
JP-A-6-50918

  However, just because the driver gets on the vehicle does not necessarily mean that the vehicle is to start immediately. Therefore, in the apparatus described in Patent Document 1, useless power supply may be performed to the alcohol concentration detection means. For example, it is conceivable that a person simply gets on to take a baggage in the passenger compartment, or that there is time between getting on and taking off the vehicle.

  This invention is for solving such a subject, and makes it a main objective to provide the drunk driving prevention apparatus which can suppress electric power consumption more.

In order to achieve the above object, the first aspect of the present invention provides:
A drunk driving prevention device mounted on a vehicle,
Travel drive means state detection means for detecting the state of the travel drive means;
Brake pedal operation state detection means for detecting the operation state of the brake pedal;
A drinking level test means for testing whether the driver is in a drinking level,
When the travel drive means state detection means detects that the travel drive means is stopped and the brake pedal operation state detection means detects that the brake pedal is depressed, the drinking level inspection means Control means for actuating
A drunk driving prevention apparatus comprising:

  According to this first aspect of the present invention, in order to operate the drinking level inspection means triggered by the brake pedal operation by the driver, which is generally an essential operation for starting the engine, the driver operates the engine. Immediately before starting, the drinking level inspection means starts to operate. Therefore, waste of power consumption by the drinking level inspection means can be reduced. Thereby, power consumption can be suppressed more.

In order to achieve the above object, the second aspect of the present invention provides:
A drunk driving prevention device mounted on a vehicle,
Travel drive means state detection means for detecting the state of the travel drive means;
Brake pedal operation state detection means for detecting the operation state of the brake pedal;
A drinking level test means for testing whether the driver is in a drinking level,
Power supply means capable of supplying power to at least the drinking level inspection means;
When the travel drive means state detection means detects that the travel drive means is stopped and the brake pedal operation state detection means detects that the brake pedal is depressed, the drinking level inspection means Control means for controlling the power supply means to start power supply to
A drunk driving prevention apparatus comprising:

  According to the second aspect of the present invention, in order to start the power supply to the drinking level inspection means triggered by the brake pedal operation by the driver, which is generally regarded as an essential operation for starting the engine, the driver Immediately before trying to start the engine, the drinking level inspection means is ready for operation. Therefore, waste of power consumption by the drinking level inspection means can be reduced. Thereby, power consumption can be suppressed more.

In the first or second aspect of the present invention,
The control means is in a state in which it is detected that the brake pedal is depressed by the brake pedal operation state detection means when the travel drive means is detected to be stopped by the travel drive means state detection means. Then, when the driver obtains a test result indicating that the driver is not in a drinking state by the drinking level inspection unit, the driving unit for the vehicle may be permitted to start.

  Accordingly, since it is difficult for the driver to change while depressing the brake pedal, so-called impersonation by another person can be prevented.

In the first or second aspect of the present invention,
A start switch for instructing start of the travel drive means;
In the scene where it is necessary for the control means to obtain a test result that the driver is not in the drinking state by the drinking level inspection device in order to start the travel driving means, the brake pedal is depressed by the brake pedal operation state detection unit. Means for starting the travel drive means without operating the start switch when a test result indicating that the driver is not in a drinking state is obtained by the drinking state inspection means in a state where it is detected that It may be a thing.

  Thereby, a driver | operator's operation burden and troublesomeness can be reduced.

In the first or second aspect of the present invention,
The control means, when the test result that the driver is not in a drinking state is obtained by the drinking state inspection means in a state where it is detected that the brake pedal is depressed by the brake pedal operation state detection means, It may be a means for starting the drive means.

  Thereby, a driver | operator's operation burden and troublesomeness can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the drunk driving prevention apparatus which can suppress electric power consumption more can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

<First embodiment>
The drunk driving prevention apparatus 1 according to the first embodiment of the present invention will be described below. FIG. 1 is a diagram illustrating an example of the overall configuration of the drunk driving prevention device 1. The drunk driving prevention device 1 includes, as main components, an engine ECU (Electronic Control Unit) 10, a brake switch (also referred to as a stop lamp switch) 20 for detecting depression of a brake pedal, an alcohol inspection device 30, and the like. The immobilizer ECU 40, the battery 50, and the drunk driving prevention ECU 60 are provided. In the figure, broken line arrows indicate the flow of main information communication.

  Each ECU is, for example, a microcomputer in which a ROM (Read Only Memory), a RAM (Random Access Memory), etc. are connected to each other via a bus with a central processing unit (CPU) as the center, and an HDD (Hard Disc). Drive, DVD (Digital Versatile Disk) drive, CD (Compact Disc) drive, storage device such as flash memory, I / O port, timer, counter and the like. The ROM stores programs and data executed by the CPU. Each ECU is connected by, for example, multiple communication lines, and is configured to be able to refer to input / output information. The drunk driving prevention ECU 60 may be integrated with another ECU or the like.

  A crank angle signal that is a detection value of a crank angle sensor 12 that detects the rotation angle of the crankshaft is input to the engine ECU 10, and the engine ECU 10 calculates the engine speed based on the crank angle signal. .

  The engine ECU 10 is connected to devices such as a starter 14, a throttle motor, and an igniter for starting the engine. The engine ECU 10 controls engine start control, idling operation control, intake air amount adjustment control, ignition timing. Control, fuel cut control, etc. are performed centrally.

  The brake switch 20 is attached to the brake pedal, and outputs an ON signal when the brake pedal is depressed more than a certain amount. Alternatively, when the vehicle is equipped with a hydraulic brake device, a master pressure sensor that detects the hydraulic pressure inside the master cylinder may be used. In this case, when the output value of the master pressure sensor is equal to or greater than a predetermined value, the drunk driving prevention ECU 60 determines that the brake pedal has been depressed to some extent.

  The alcohol testing device 30 includes, for example, an exhalation air inlet and a test sensor. The exhalation air inlet is disposed near the driver's seat. More specifically, in a domestic vehicle where the driver's seat is on the right side of the vehicle, for example, on the right side of the steering column on the instrument panel, it is difficult to receive an inspection unless the driver's seat is seated. It is desirable to be disposed. Thereby, it is possible to increase the certainty that the driver has been inspected. The driver's exhaled air that has been blown into the exhalation port is supplied to the inspection sensor through a dedicated channel. The test sensor includes, for example, a pressure sensor and a humidity sensor for confirming that human breath has been actually blown, and an alcohol gas sensor for measuring the alcohol concentration in the breath. The output value of the inspection sensor, that is, the inspection value of the alcohol inspection device 30 is output to the drunk driving prevention device ECU 60 via an analog / digital converter or the like.

  A mobile device detection device 42 and a start switch 46 are connected to the immobilizer ECU 40. The portable device detection device 42 detects the portable device 44 owned by each driver registered on the vehicle side by wireless communication. The portable device 44 emits a weak radio wave (response signal) in response to the request signal sent from the portable device detection device 42. When the portable device 44 is attached to the user and approaches the vehicle, the portable device detection device 42 receives the response signal of the smart key, and the immobilizer ECU 40 decodes the response signal (including the personal ID unique to the smart key). Input.

  The immobilizer ECU 40 determines whether or not the personal ID transmitted from the portable device detection device 42 is the same as that registered in advance on the vehicle side, and if this matches, the engine start permission signal is output from the drunk driving prevention ECU 60. Is input, the engine start permission state is entered. When the start switch 46 is pushed by the driver in this state, an instruction is given to a relay device 52, which will be described later, to turn on the power line of the traveling drive system, and an engine start instruction signal is output to the engine ECU 10. .

  The battery 50 is, for example, a secondary battery, and supplies power to the alcohol testing device 30 and other in-vehicle devices via a DC / DC converter, a relay device 52, and the like (not shown). The alcohol testing device 30 is connected to the battery 50 via the drunk driving prevention ECU 60. The electric power line from the battery 50 to the drunk driving prevention ECU 60 and others is in an energized state even during parking. In addition, the drunk driving prevention ECU 60 monitors the voltage of the power line of the driving system that is energized during engine operation, and whether the engine is operating or stopped based on the voltage value. I know.

  The method of grasping the state of the engine is not limited to this. For example, the engine ECU 10 may refer to an engine state signal (IG signal) output to the multiple communication line.

  Note that illustration and description of power lines other than the power line from the battery 50 to the alcohol test apparatus 30 via the drunk driving prevention ECU 60 are omitted.

  The drunk driving prevention ECU 60 confirms that the engine is stopped based on the voltage value of the power line of the traveling drive system, and confirms that the brake pedal is depressed by an input signal from the brake switch 20. When this happens, the internal relay 62 is turned on to start supplying power to the alcohol testing device 30 to operate the alcohol testing device 30.

  When the alcohol test apparatus 30 obtains a test result indicating that the driver is not in a drinking state (alcohol concentration is less than a threshold value), an engine start permission signal is output to the immobilizer ECU 40.

  In other words, the alcohol inspection device 30 is activated by using a brake pedal operation by the driver as a trigger, which is generally an essential operation for starting the engine. Thereby, the alcohol test | inspection apparatus 30 will start an operation | movement immediately before a driver | operator tries to start an engine. Therefore, waste of power consumption by the alcohol testing device 30 can be reduced.

  In a well-known smart entry system, etc., it is common to press the engine start switch while depressing the brake pedal, and the driver will also undergo an alcohol test as a series of operations for starting the engine. , The annoyance is reduced. Furthermore, since it is difficult for the driver to change while depressing the brake pedal, so-called impersonation by another person, that is, the driver himself / herself can be prevented from being inspected by being inspected by a person other than the driver. .

  FIG. 2 is a flowchart showing a flow of characteristic processing executed by the drunk driving prevention ECU 60. This flow is repeatedly executed with a predetermined cycle, for example.

  First, it is determined whether or not the engine is stopped by the method exemplified above (S100). If it is determined that the engine is not stopped, one routine of this flow is terminated without performing any processing.

  If it is determined that the engine is stopped, the system waits until the brake pedal is depressed (S102). In the figure, the brake pedal is indicated as “BP”.

  When the brake pedal is depressed, the alcohol testing device 30 is activated (S104). And it waits until a driver | operator's breath is blown into the alcohol test | inspection apparatus 30 (S106).

  In parallel with S102, the driver may be notified to step on the brake pedal through a speaker or the like. In parallel with S104, the driver may be notified that an alcohol test needs to be performed.

  When the driver's breath is blown into the alcohol testing device 30, it is determined whether or not the driver is in a drinking state (S108). When it is determined that the driver is in a drunk state, predetermined drunk driving suppression control such as output of an alarm by a speaker and notification to the outside is executed (S110). In this case, the engine start permission signal is not output. Thereby, drunk driving can be prevented appropriately.

  On the other hand, when it is determined that the driver is not in a drinking state, an engine start permission signal is output to the immobilizer ECU 40 (S112). The immobilizer ECU 40 outputs an engine start instruction signal to the engine ECU 10 when the driver operates the start switch 46 on condition that the above-described personal ID is verified. In response to this, the engine ECU 10 drives the starter 14 to perform cranking control of the engine and start the engine.

  According to the drunk driving prevention device 1 of the present embodiment described above, the alcohol testing device 30 starts operating immediately before the driver tries to start the engine. Waste can be reduced as compared with the conventional configuration.

  Also, the trouble for the driver is reduced, and it is difficult for the driver to change while depressing the brake pedal, so it is possible to prevent so-called impersonation by others.

<Second embodiment>
Hereinafter, the drunk driving prevention apparatus 2 according to the second embodiment of the present invention will be described. Since the drunk driving prevention device 2 is common to the drunk driving prevention device 1 according to the first embodiment in the hardware configuration, the same reference numerals are given to the respective components and the description thereof is omitted.

  The immobilizer ECU 40 according to the present embodiment determines whether or not the personal ID transmitted from the portable device detection device 42 is the same as that registered in advance on the vehicle side, and this matches, and the drunk driving prevention ECU 60 When an engine start request signal is input from, an engine start instruction signal is output to the engine ECU 10.

  The drunk driving prevention ECU 60 according to the present embodiment confirms that the engine is stopped based on the voltage value of the power line of the travel drive system, and the brake pedal is depressed by an input signal from the brake switch 20. When it is confirmed that the internal relay 62 is turned on, power supply to the alcohol testing device 30 is started and the alcohol testing device 30 is operated.

  When the alcohol test apparatus 30 obtains a test result indicating that the driver is not in a drinking state (alcohol concentration is less than a threshold value), an engine start request signal is output to the immobilizer ECU 40.

  That is, in the present embodiment, in the situation where the alcohol test is necessary in the state where the engine is stopped, when the test result that the driver is not in the drinking state is obtained by the alcohol test device 30, The engine starts automatically without waiting for operation.

  As a result, in the same way as in the first embodiment, waste of power consumption by the alcohol testing device 30 can be reduced, and the operation burden and annoyance of the driver can be further reduced.

  The “scene requiring alcohol inspection” refers to, for example, a scene that is confirmed at night and that the driver currently seated in the driver's seat has not yet undergone the alcohol inspection. Judgment of whether or not this is the case is performed by checking the time zone using an internal clock of the ECU, detecting the change of the driver based on the vehicle interior camera, the seating sensor (pressure sensor), the seat belt attachment / detachment, and other methods. be able to.

  FIG. 3 is a flowchart showing a flow of characteristic processing executed by the drunk driving prevention ECU 60 according to the present embodiment. This flow is repeatedly executed with a predetermined cycle, for example.

  First, it is determined whether or not the engine is stopped by the method exemplified above (S200). If it is determined that the engine is not stopped, one routine of this flow is terminated without performing any processing.

  If it is determined that the engine is stopped, it is determined whether or not the scene requires an alcohol test (S202). If it is determined that the alcohol inspection is not necessary, an engine start permission signal is output to the immobilizer ECU 40 (S204).

  If it is determined that the alcohol inspection is necessary, the process waits until the brake pedal is depressed (S206).

  When the brake pedal is depressed, the alcohol testing device 30 is activated (S208). And it waits until a driver | operator's breath is blown into the alcohol test | inspection apparatus 30 (S210).

  In parallel with S206, the driver may be notified to step on the brake pedal through a speaker or the like. In parallel with S208, the driver may be notified that an alcohol test needs to be performed.

  When the driver's breath is blown into the alcohol testing device 30, it is determined whether or not the driver is in a drunk state (S212). When it is determined that the driver is in a drunk state, predetermined drunk driving suppression control such as output of an alarm by a speaker or notification to the outside is executed (S214). In this case, the engine start permission signal or the engine start request signal is not output. Thereby, drunk driving can be prevented appropriately.

  On the other hand, when it is determined that the driver is not in a drinking state, an engine start request signal is output to the immobilizer ECU 40 (S216). The immobilizer ECU 40 outputs an engine start instruction signal to the engine ECU 10 on the condition that the above-described personal ID is collated (without requiring the operation of the start switch 46). In response to this, the engine ECU 10 drives the starter 14 to perform cranking control of the engine and start the engine.

  According to the drunk driving prevention device 2 of the present embodiment described above, the alcohol testing device 30 starts operating immediately before the driver tries to start the engine. Waste can be reduced as compared with the conventional configuration.

  Further, the trouble for the driver is further reduced, and it is difficult for the driver to change while depressing the brake pedal, so that impersonation by another person can be prevented.

<Other embodiments>
In the second embodiment, the start switch 46 may be omitted, and an alcohol test may be performed every time the engine is started. Then, as in the second embodiment, the engine is automatically started when the driver obtains a test result indicating that the driver is not in a drinking state in the alcohol test.

  A flowchart in this case is shown in FIG. First, it is determined whether or not the engine is stopped (S300). If it is determined that the engine is not stopped, one routine of this flow is terminated without performing any processing.

  If it is determined that the engine is stopped, the system waits until the brake pedal is depressed (S302).

  When the brake pedal is depressed, the alcohol testing device 30 is activated (S304). And it waits until a driver | operator's breath is blown into the alcohol test | inspection apparatus 30 (S306).

  In parallel with S302, the driver may be notified to step on the brake pedal through a speaker or the like. In parallel with S304, the driver may be notified that an alcohol test needs to be performed.

  When the driver's breath is blown into the alcohol testing device 30, it is determined whether or not the driver is in a drinking state (S308). When it is determined that the driver is in a drunk state, predetermined drunk driving suppression control such as output of an alarm by a speaker and notification to the outside is executed (S310). In this case, the engine start request signal is not output. Thereby, drunk driving can be prevented appropriately.

  On the other hand, when it is determined that the driver is not in a drinking state, an engine start request signal is output to the immobilizer ECU 40 (S312).

  The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  For example, in the embodiment, it has been described that “when the brake pedal is depressed, the alcohol inspection device 30 is operated and the engine start is permitted according to the inspection result”, but continuously until the engine start is permitted. The brake pedal may be required to be depressed, or the engine start may be permitted if an inspection result is obtained (or an inspection is performed) within a predetermined time after the brake pedal is depressed. .

  Similarly, the alcohol inspection device 30 may be operated only while the brake pedal is depressed, or the alcohol inspection device 30 may be activated for a predetermined time after the brake pedal is depressed.

  In addition, the engine is illustrated as an example of the “traveling drive unit” in the claims, but the present invention is not limited thereto, and a motor that outputs a travel driving force by electric power may be used as the “traveling drive unit”. In the case of a hybrid vehicle, both the engine and the motor correspond to “traveling drive means”.

  The present invention can be used in the automobile manufacturing industry, the automobile parts manufacturing industry, and the like.

It is a figure which shows an example of the whole structure of the drunk driving prevention apparatus 1 which concerns on 1st Example of this invention. It is a flowchart which shows the flow of the characteristic process performed by ECU60 for drunk driving prevention which concerns on 1st Example. It is a flowchart which shows the flow of the characteristic process performed by ECU60 for drunk driving prevention which concerns on 2nd Example. It is a flowchart which shows the flow of the characteristic process performed by ECU60 for drunk driving prevention which concerns on the other Example of this invention.

Explanation of symbols

1, 2, Drunk driving prevention device 10 Engine ECU
12 Crank angle sensor 14 Starter 20 Brake switch 30 Alcohol testing device 40 Immobilizer ECU
50 battery 52 relay device 60 drunk driving prevention ECU
62 Internal relay

Claims (5)

A drunk driving prevention device mounted on a vehicle,
Travel drive means state detection means for detecting the state of the travel drive means;
Brake pedal operation state detection means for detecting the operation state of the brake pedal;
A drinking level test means for testing whether the driver is in a drinking level,
When the travel drive means state detection means detects that the travel drive means is stopped and the brake pedal operation state detection means detects that the brake pedal is depressed, the drinking level inspection means Control means for actuating
A drunk driving prevention device comprising: A drunk driving prevention device mounted on a vehicle,
Travel drive means state detection means for detecting the state of the travel drive means;
Brake pedal operation state detection means for detecting the operation state of the brake pedal;
A drinking level test means for testing whether the driver is in a drinking level,
Power supply means capable of supplying power to at least the drinking level inspection means;
When the travel drive means state detection means detects that the travel drive means is stopped and the brake pedal operation state detection means detects that the brake pedal is depressed, the drinking level inspection means Control means for controlling the power supply means to start power supply to
A drunk driving prevention device comprising: The drunk driving prevention device according to claim 1 or 2,
The control means is in a state in which it is detected that the brake pedal is depressed by the brake pedal operation state detection means when the travel drive means is detected to be stopped by the travel drive means state detection means. In the case where the test result that the driver is not in the drinking state is obtained by the drinking level inspection means, the start of the driving device of the vehicle is permitted.
Drunk driving prevention device. The drunk driving prevention device according to claim 1 or 2,
A start switch for instructing start of the travel drive means;
In the scene where it is necessary for the control means to obtain a test result that the driver is not in the drinking state by the drinking level inspection device in order to start the travel driving means, the brake pedal is depressed by the brake pedal operation state detection unit. Means for starting the travel drive means without operating the start switch when a test result indicating that the driver is not in a drinking state is obtained by the drinking state inspection means in a state where it is detected that ,
Drunk driving prevention device. The drunk driving prevention device according to claim 1 or 2,
The control means, when the test result that the driver is not in a drinking state is obtained by the drinking state inspection means in a state where it is detected that the brake pedal is depressed by the brake pedal operation state detection means, Means for starting the drive means;
Drunk driving prevention device.

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