JP2009001102A - Drink driving prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drink driving prevention system flexibly adaptable to the circumstances. <P>SOLUTION: A drink driving prevention controller 5 outputs an engine start permission signal to an engine controller 6 irrespective of the result of alcohol detection by an alcohol detector 4 even if a normal electronic key 2 is not used when an emergency start switch 7 is operated. As a result, when an engine start button (not shown) is pressed, the engine is started by the engine controller 6 to allow the vehicle to be temporarily operated. The number of times of the temporary operations permitted, the travel distance by the temporary operations, and the time in which the temporary operations are permitted are limited. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a system for preventing drunk driving.

Patent Document 1 discloses a system of this type that prohibits starting of an engine when alcohol exceeding a reference value is detected by an alcohol detector.
JP 63-53120 A

  However, in the system disclosed in Patent Document 1, alcohol detection before starting the engine is obligatory, and engine start is not permitted unless alcohol below the reference value is detected.

For this reason, at the time of failure or loss of the alcohol detector, alcohol below the reference value is not detected thereby, and in this case, engine start is not permitted.
On the other hand, at the time of a disaster or at the end of a crossing, it is necessary to detect alcohol prior to starting the engine. End up.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a drunk driving prevention system capable of flexibly dealing with the situation at that time.

  In order to achieve the above object, the invention according to claim 1 requires a temporary driving in a drunk driving prevention system that prohibits driving of a vehicle when alcohol exceeding a reference value is detected by an alcohol detector. A temporary driving operation means that is operated to allow the vehicle to operate regardless of the result of alcohol detection by the alcohol detector when the temporary driving operation means is operated. The gist of this is.

  According to this configuration, by operating the operation means for temporary driving, driving of the vehicle is allowed without performing alcohol detection by the alcohol detector. For this reason, when the alcohol detector is broken or lost, it is convenient because the temporary operation is permitted by operating the operation means for temporary operation. On the other hand, even during a disaster or at an engine stall crossing, it is convenient because the temporary operation is allowed by operating the operation means for temporary operation. Accordingly, it is possible to flexibly cope with the situation at that time.

  The invention according to claim 2 is the drunk driving prevention system according to claim 1, when the travel distance from the time when the driving of the vehicle is permitted by the temporary driving permission means reaches the allowable travel distance, or The gist of the invention is that it includes temporary driving restriction means for prohibiting driving of the vehicle when the elapsed time from the time when the driving of the vehicle is allowed by the temporary driving permission means reaches an allowable travel time.

  According to this configuration, when the temporary driving operation means is operated, the vehicle is allowed to operate, but it is subject to distance or time restrictions. For this reason, a person who abuses the operation means for extraordinary driving in order to avoid alcohol detection is treated differently from normal driving that is not subject to these restrictions each time it is operated. Therefore, by distinguishing between the temporary operation and the normal operation, the abuse of the operation means for the temporary operation can be prevented.

  According to a third aspect of the present invention, in the drunk driving prevention system according to the first or second aspect, the temporary driving permission means includes the current operation when the temporary driving operation means is operated. The gist is to allow driving of the vehicle regardless of the result of alcohol detection by the alcohol detector, provided that the total number of operations is equal to or less than the allowable number of operations.

  According to this configuration, the number of times that the temporary operation is allowed is determined in advance, the temporary operation is allowed within the range, and when the total number of operations of the operation means for the temporary operation eventually exceeds the allowable number of operations, the temporary operation is performed. become unable. That is, every time the operating means for temporary operation is operated, the number of times that the temporary operation can be performed after the next time decreases. Therefore, abuse of the operating means for temporary operation can be prevented.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the present invention, it is possible to flexibly cope with the situation at that time.

Hereinafter, an embodiment embodying the present invention will be described.
As shown in FIG. 1, an electronic key system 1 is applied to the automobile of this embodiment. The electronic key system 1 includes an electronic key 2 possessed by a vehicle user and a security device 3 provided on the vehicle side, and bidirectional communication is possible between them. The electronic key 2 is called a portable device because of its possession.

  The electronic key 2 has a reception function by wireless communication and a transmission function by wireless communication, and includes a reception antenna 21, a reception circuit 22, a microcomputer 23, a transmission circuit 24, and a transmission antenna 25.

  The receiving antenna 21 is a medium for receiving a request signal transmitted from the security device 3. The reception circuit 22 demodulates the request signal received by the reception antenna 21 to generate a reception signal, and outputs the reception signal to the microcomputer 23.

  The microcomputer 23 includes a non-volatile memory 23a, and an ID code (ID code of the electronic key 2) individually set for the electronic key 2 is stored in the memory 23a. When the reception signal related to the request signal is input from the reception circuit 22, the microcomputer 23 generates a signal (ID code signal) including the ID code of the electronic key 2 in order to respond to the request signal. The code signal is output to the transmission circuit 24.

  The transmission circuit 24 modulates the ID code signal input from the microcomputer 23 into a radio wave having a predetermined frequency (300 MHz in this embodiment). The transmission antenna 25 is a medium for transmitting the ID code signal modulated by the transmission circuit 24.

  The security device 3 has a transmission function by wireless communication and a reception function by wireless communication, and includes a transmission circuit 31, a transmission antenna 32, a reception antenna 33, a reception circuit 34, and a verification device 35.

  The transmission circuit 31 modulates the request signal input from the collation device 35 into a radio wave having a predetermined frequency (134 KHz in this embodiment). The transmission antenna 32 is a medium for transmitting the request signal modulated by the transmission circuit 31.

  Here, the request signal transmitted from the transmission antenna 32 extends over substantially the entire area inside the vehicle and hardly reaches outside the vehicle. In FIG. 2, the region is indicated by a two-dot chain line as a predetermined region A32 in the vehicle. In the predetermined area A32 in the vehicle, bidirectional communication between the electronic key 2 and the security device 3 is possible. That is, when the electronic key 2 is brought into the predetermined area A32 in the vehicle while the request signal is transmitted in the predetermined area A32 in the vehicle, the request signal is received by the electronic key 2 and the electronic key 2 2 transmits an ID code signal.

  Returning to FIG. 1, the receiving antenna 33 is a medium for receiving an ID code signal transmitted from the electronic key 2 as a response signal to the request signal. The receiving circuit 34 demodulates the ID code signal received by the receiving antenna 33 to generate a received signal, and outputs the received signal to the verification device 35.

  The verification device 35 includes a non-volatile memory 35a, and the memory 35a has the same ID code as the ID code of the electronic key 2 (= the regular electronic key 2) that is suitable for the vehicle on which the security device 3 is mounted. A code (reference ID code) is stored.

  When the door is opened, the collating device 35 outputs a request signal to the transmission circuit 31 in order to monitor boarding (entry into the predetermined area A32 in the vehicle) by the owner of the proper electronic key 2. That is, in this case, the collation device 35 performs in-vehicle communication control. As a result, a request signal is transmitted from the transmission antenna 32 into the predetermined area A32 in the vehicle.

  When the reception signal related to the ID code signal is input from the reception circuit 34 due to the execution of the in-vehicle communication control, the verification device 35 matches the ID code included in the reception signal with the reference ID code. Judge whether or not. That is, in this case, the collation device 35 performs ID code collation. And the collation apparatus 35 recognizes that the regular electronic key 2 was used when both ID codes correspond by this ID code collation. And the collation apparatus 35 will output the signal (ID code coincidence signal) which suggests that the regular electronic key 2 was utilized to the drunk driving prevention control apparatus 5, when it recognizes in this way. As a result, when the regular electronic key 2 is used, one of the conditions required for starting the engine is satisfied.

Next, feature points in the automobile of this embodiment will be described.
In the automobile according to the present embodiment, as a condition for permitting the start of the engine, in addition to the use of the regular electronic key 2, alcohol detection by the alcohol detector 4 is performed, resulting in lower than the reference value. It is necessary to detect alcohol.

  The alcohol detector 4 is installed in the vehicle, and includes an exhalation air inlet 41, a microcomputer 42, an alcohol detection switch 43, and an alcohol sensor 44. In addition, the alcohol detector 4 is not limited to what is installed in a vehicle. For example, it may be held together with the electronic key 2 by the vehicle user himself / herself or a person who has received permission from the person.

  The exhalation-breathing port 41 is for an alcohol subject to breathe in. Then, when the air volume of the exhaled air blown from the exhalation air inlet 41 is detected by an air volume sensor (not shown) and reaches the reference air volume, the microcomputer 42 properly detects alcohol by the alcohol subject. It is to be treated as a thing.

  The alcohol detection switch 43 is operated to start alcohol detection by the alcohol detector 4. Then, the microcomputer 42 starts preparations necessary for alcohol detection by the alcohol detector 4 with the operation of the alcohol detection switch 43 as a trigger.

  The alcohol sensor 44 can detect the amount of alcohol in the expired gas when the sensor element is heated and reaches a predetermined temperature, that is, when the heating is completed, and also according to the amount of alcohol. A detection signal is output to the microcomputer 42. The microcomputer 42 starts heating the alcohol sensor 44 as a preparation necessary for alcohol detection by the alcohol detector 4 with the operation of the alcohol detection switch 43 as a trigger. Then, when the heating of the alcohol sensor 44 is completed, the microcomputer 42 validates the detection signal input from the alcohol sensor 44 while monitoring the volume of exhaled air.

  When the detection signal from the alcohol sensor 44 is validated, the microcomputer 42 analyzes the detection signal, thereby recognizing the amount of alcohol in the breath that has been blown from the breath blowing port 41. Then, the microcomputer 42 generates a signal (alcohol detection result signal) including information on the amount of alcohol in the expired air, and outputs it to the drunk driving prevention control device 5.

  The drunk driving prevention control device 5 determines whether or not the alcohol amount in the expiration is less than the reference alcohol amount by analyzing the information regarding the alcohol amount in the expiration included in the alcohol detection result signal. Note that data relating to the reference alcohol amount is stored in a non-volatile memory (not shown), and for example, the alcohol amount per liter of breath is set to 0.15 milligram (= 0.15 mg / L). As a result, when the amount of alcohol in the exhalation is less than the reference amount of alcohol, one of the conditions necessary for starting the engine is satisfied.

  Then, the drunk driving prevention control device 5 causes the engine control device 6 to notify the engine control device 6 when the amount of alcohol in the exhalation falls below the reference alcohol amount and the regular electronic key 2 is used (introduced into the predetermined area A32 in the vehicle) An engine start permission signal is output. As a result, when the engine start button (not shown) is pressed in a state where the engine is allowed to start in this way, the engine is started by the engine control device 6, thereby allowing operation by a person who is not in a drinking state. Will be.

  On the other hand, when the alcohol amount exceeding the reference alcohol amount is detected by the alcohol detector 4, the drunk driving prevention control device 5 outputs the engine start permission signal regardless of whether or not the regular electronic key 2 is used. It is supposed not to. As a result, in such a case, driving of the vehicle is prohibited, and thus driving of the vehicle by a person in a drunk state, that is, drunk driving is prevented in advance.

  The operation so far is based on the assumption that an emergency start switch 7 to be described later is not operated. Therefore, the operation is not limited to this when the emergency start switch 7 is operated. Hereinafter, an operation when the emergency start switch 7 is operated will be described.

  The drunk driving prevention control device 5 is electrically connected to an emergency start switch 7 that is operated to request a temporary operation different from the normal operation as described above. Examples of the situation where the temporary operation is required include, for example, when the alcohol detector 4 is broken or lost, and at the time of a disaster or crossing a railroad crossing. Therefore, the emergency start switch 7 is easily operated from the driver's seat and is provided in a conspicuous place like the existing hazard switch so that it can be quickly operated under such circumstances.

  When the emergency start switch 7 is operated, the drunk driving prevention control device 5 does not matter the result of alcohol detection by the alcohol detector 4, and only at this time, even if the regular electronic key 2 is not used, the engine An engine start permission signal is output to the control device 6. Therefore, in an extremely rare example, even when the regular electronic key 2 suddenly runs out of battery or a communication error occurs in the above situation, the vehicle user presses the emergency start switch 7. Benefit from operating. As a result, in such a case, when an engine start button (not shown) is pressed, the engine is started by the engine control device 6, thereby allowing a temporary operation of the vehicle.

  However, the number of times such benefits can be received, that is, the number of times that the temporary operation is allowed, is determined in advance, and the temporary operation is allowed within the range. In the present embodiment, when the emergency start switch 7 is operated, the total number of operations including the current operation is counted by the drunk driving prevention control device 5 and is less than 3 times (allowable operation number). Temporary operation is allowed on the condition that there is. Therefore, in the present embodiment, the temporary operation is permitted until the total number of operations of the emergency start switch 7 is three times, and when the total number of operations of the emergency start switch 7 eventually exceeds three times (from the fourth time), Temporary driving is not possible. The total number of operations of the emergency start switch 7 is stored in the non-volatile memory 5a and is thereby managed by the drunk driving prevention control device 5.

  The information managed in this way, that is, the information related to the total number of operations of the emergency start switch 7 is strictly managed so that it cannot be rewritten even by a third party as well as a vehicle user. Specifically, only rewriting by a management device owned only by a so-called dealer is allowed. More specifically, the total number of operations of the emergency start switch 7 can be reset only by electrically connecting the management device and the drunk driving prevention control device 5 and performing an operation input using the management device. I can't do it. In the present embodiment, the management device corresponds to an operation count resetting unit. Incidentally, the allowable number of operations cannot be set unless this management device is used. Therefore, the management device functions as an allowable operation number setting means.

  By the way, when the emergency start switch 7 is operated as described above, the drunk driving prevention control device 5 acquires information on the date and place where the emergency start switch 7 was performed from the GPS device 8 and uses it to make an emergency start. An operation history including the date and time when the switch 7 was operated is created and stored in the memory 5a. The information regarding the operation history can be confirmed later by using the management device owned by the dealer. In the present embodiment, the memory 5a corresponds to history storage means. On the other hand, the management device functions as history confirmation means.

  In addition, when the emergency start switch 7 is operated as described above, the drunk driving prevention control device 5 monitors the travel distance and the elapsed time from the time when it is permitted. It has become. Note that the monitoring of the travel distance from the time when the temporary operation is permitted is realized by analyzing the detection signal related to the travel distance input from the travel distance sensor 9. On the other hand, the monitoring of the elapsed time from the time when the temporary driving is permitted is realized by referring to the time measurement result by a timer (not shown) provided in the drunk driving prevention control device 5.

  Then, the drunk driving prevention control device 5 determines whether the travel distance from the time when the temporary driving is allowed reaches the allowable travel distance, or the elapsed time from the time when the temporary driving is allowed reaches the allowable travel time, or at least When either one is satisfied, the driving of the vehicle is prohibited and the temporary driving is stopped at that time. These allowable travel distance and allowable travel time cannot be set unless the management device owned by the dealer is used. Therefore, the management device functions as an allowable travel distance setting unit and an allowable travel time setting unit.

  Incidentally, these values may be set to allow for the maximum value of the required distance / time required from each point in the range to the dealer while taking into account the usual vehicle use range. Then, when it becomes a situation where it is necessary to perform a temporary operation within the normal usage range, it is preferable because it is possible to travel from that point to a maintenance facility such as a dealer. Even if it is not possible to go to the dealer immediately, temporary driving is allowed up to three times, so there is an early stage (for example, at the time of the second temporary driving) at the stage when going to the dealer. If it goes to, it will be possible to receive maintenance (including purchase of a new alcohol detector 4 and resetting the total number of operations) by the dealer.

  Further, the total allowable travel distance and the total allowable travel time may be set in advance, and the temporary operation may be performed as many times as necessary until the total allowable travel distance and total allowable travel time are reached. In this way, even if the travel distance and travel time required for one extra operation are long, there is a low possibility that the extra operation will be interrupted on the way, so that even from a distance or there is a traffic jam. Will be able to run on their own to the dealer.

  In the present embodiment, a drunk driving prevention system is constructed by the alcohol detector 4, the drunk driving prevention control device 5, and the emergency start switch 7. That is, such a drunk driving prevention system is applied to the automobile of this embodiment. And in this embodiment, the emergency start switch 7 is equivalent to the operation means for temporary operation. On the other hand, the drunk driving prevention control device 5 corresponds to temporary driving permission means and temporary driving restriction means.

As described above, according to the present embodiment, the following operations and effects can be obtained.
(1) By operating the emergency start switch 7, driving of the vehicle is allowed without performing alcohol detection by the alcohol detector 4. For this reason, when the alcohol detector 4 is broken or lost, it is convenient to operate the emergency start switch 7 to allow temporary operation. On the other hand, it is convenient to operate the emergency start switch 7 at the time of a disaster or at the time of crossing a railroad crossing to allow temporary operation. Accordingly, it is possible to flexibly cope with the situation at that time.

  (2) When the emergency start switch 7 is operated, the vehicle is allowed to operate, but it is subject to distance or time restrictions. For this reason, a person who abuses the emergency start switch 7 in order to avoid alcohol detection is treated differently from normal operation that is not subject to these restrictions each time it is operated. Therefore, the emergency start switch 7 can be prevented from being abused by differentiating the temporary operation from the normal operation.

  (3) The number of times that the temporary operation is allowed is determined in advance, and the temporary operation is allowed within that range. If the total number of operations of the emergency start switch 7 eventually exceeds 3 (allowable operation times), the temporary operation is performed. Can not be. That is, every time the emergency start switch 7 is operated, the number of times that the temporary operation after the next time can be performed decreases. Therefore, abuse of the emergency start switch 7 can be prevented.

  (4) The number of extraordinary operations can be reset only at maintenance facilities represented by so-called dealers. In other words, not only a third party but also the vehicle user himself can not do so, and so the manipulation of the total number of operations is prevented. Therefore, the security level can be improved.

  (5) By leaving the operation history of the emergency start switch 7, it can be confirmed later. For this reason, if the emergency start switch 7 is operated unnecessarily, the history will remain, and the effect of suppressing such abuse can be obtained. Therefore, abuse of the emergency start switch 7 can be prevented.

  (6) Considering the situation when it is used in advance, the emergency start switch 7 is easy to operate from the driver's seat and is provided in a conspicuous place, so that operations relating to temporary driving can be performed quickly. As well as this, the engine can be started as soon as possible in an emergency.

  (7) In an emergency, temporary operation is permitted by operating the emergency start switch 7 without detecting alcohol. Here, the fact that the alcohol detection need not be performed is none other than that there is no waiting time until the heating of the alcohol sensor 44 is completed. Therefore, time margin can be given to the user.

  (8) If the alcohol detector 4 is broken or lost, a temporary operation is allowed by operating the emergency start switch 7 without detecting alcohol. Accordingly, such a temporary driving allows the vehicle to run on its own, so that it is possible to take measures such as purchasing a new alcohol detector 4 therefor, which is very convenient.

  (9) In normal operation, the start of the engine is not permitted unless the drinking level is detected through alcohol detection and the regular electronic key 2 is not used. Therefore, engine start by a third party is restricted, so that the security level can be improved.

  (10) Since the alcohol detector 4 is a system in which exhaled air is directly blown from the breath blowing port 41, the detection accuracy of alcohol detection can be improved. It should be noted that it is convenient from the viewpoint of hygiene if it is possible to replace the breath-inlet 41 directly attached by the alcohol subject so that it can be changed from the one for others to the one for your own use. is there.

  (11) Since the drunk driving prevention control device 5 is provided separately from the verification device 35, the existing verification device 35 can be used almost as it is. Therefore, the drunk driving prevention system can be easily retrofitted to a vehicle to which the electronic key system 1 is applied.

In addition, the said embodiment can also be changed and actualized as follows.
-You may make it improve a security level by performing the encryption communication regarding mutual authentication between the alcohol detector 4 and the drunk driving prevention control apparatus 5. FIG.

-You may make it improve a security level by performing the encryption communication regarding mutual authentication between the drunk driving prevention control apparatus 5 and the engine control apparatus 6. FIG.
The vehicle key and the alcohol detector may be combined with the single electronic key 2 by providing the electronic key 2 with an alcohol detection function like the alcohol detector 4. In this case, wireless communication may be performed between the electronic key 2 and the drunk driving prevention control device 5, and the alcohol detection result may be transmitted to the drunk driving prevention control device 5 through the wireless communication.

  When the alcohol detector 4 is carried together with the electronic key 2, the alcohol detector 4 has a transmission function by wireless communication, and uses the alcohol detection result to the drunk driving prevention control device 5. Just send it.

  -You may omit the drunk driving prevention control apparatus 5 separate from the collation apparatus 35 by giving the collation apparatus 35 the drunk driving prevention control function like the drunk driving prevention control apparatus 5. By integrating in this way, the system configuration is simplified, which can contribute to the reduction in size and weight of the vehicle.

  In consideration of operability, the emergency start switch 7 is preferably provided in a conspicuous place as in the above embodiment, but in consideration of the low usage frequency, it is usually concealed by a shielding object, You may be able to operate it by releasing the concealment state. In this way, it is possible to improve the appearance around the driver's seat.

  The operation means for temporary operation is not limited to the emergency start switch 7. For example, it is good also as operation for request | requiring a temporary driving | operation by carrying out special operation combining existing switches individually or in combination. In this way, it is possible to cover the temporary operation means by existing switches without newly providing the emergency start switch 7, thereby eliminating an increase in the number of parts.

  Note that special operation of a single existing switch can reduce the number of operations when it is an operation for requesting extraordinary operation. And convenient.

  ・ Instead of or in addition to the operation history of the emergency start switch 7, a temporary operation travel history (including date and time, travel route, etc.) is created and stored in the memory 5a. You may be able to confirm with

  Data regarding the reference alcohol amount (0.15 mg / L in the above embodiment) may be stored in the memory of the microcomputer 42 of the alcohol detector 4 instead of the memory of the drunk driving prevention control device 5. In this case, the microcomputer 42 determines whether or not the amount of alcohol in the breath is below the reference alcohol amount, and the microcomputer 42 outputs a signal indicating the determination result to the drunk driving prevention control device 5. Will be. In this way, the burden on the drunk driving prevention control device 5 can be reduced.

  In addition, a notification means for notifying the determination result of whether or not the alcohol amount in the expiration is below the reference alcohol amount and the detection result of the alcohol amount in the expiration even if it does not reach the determination result, for example, a notification by voice. The alcohol detector 4 may be provided with a sounding means such as a speaker to perform or a display means such as a display for performing notification by display.

Next, a technical idea that can be grasped from the above embodiment and another example will be described.
[1] In the drunk driving prevention system according to claim 3,
An operation number reset means for resetting the total operation number;
The drunk driving prevention system is characterized in that the operation frequency resetting means is provided in a maintenance facility that maintains a vehicle to which the drunk driving prevention system is applied.

  According to this configuration, the number of times that the temporary operation is performed can be reset only at a maintenance facility represented by a so-called dealer. In other words, not only a third party but also the vehicle user himself can not do so, and so the manipulation of the total number of operations is prevented. Therefore, the security level can be improved.

[2] In the drunk driving prevention system according to any one of claims 1 to 3 and the technical idea [1],
A drunk driving prevention system, comprising: a history storage unit that stores an operation history including a date and time when the operation unit for temporary driving is operated and a place where the operation unit is operated.

  According to this configuration, the operation history of the temporary driving operation means is left so that it can be confirmed later. For this reason, if the operation means for extraordinary driving is operated unnecessarily, the history will remain, and the effect of suppressing such abuse can be obtained. Therefore, abuse of the operating means for temporary operation can be prevented.

The block diagram which shows the structure of the electronic key system applied to the motor vehicle of this embodiment, and the structure of a drunk driving prevention system. Explanatory drawing which shows the predetermined area | region in a vehicle.

Explanation of symbols

  4 ... alcohol detector, 5 ... drunk driving prevention control device (temporary driving permission means, temporary driving restriction means), 7 ... emergency start switch (temporary driving operation means).

Claims (3)

In the drunk driving prevention system that prohibits driving of the vehicle when alcohol exceeding the reference value is detected by the alcohol detector,
Operation means for temporary operation operated to request temporary operation;
A drunk driving prevention system, comprising: temporary driving permission means for allowing driving of a vehicle regardless of a result of alcohol detection by the alcohol detector when the temporary driving operation means is operated. In the drunk driving prevention system according to claim 1,
When the travel distance from the time when the vehicle operation is permitted by the temporary operation permission means reaches the allowable travel distance, or the elapsed time from the time when the vehicle operation is permitted by the temporary operation permission means is allowed to travel. A drunk driving prevention system comprising temporary driving restriction means for prohibiting driving of a vehicle when time is reached. In the drunk driving prevention system according to claim 1 or 2,
The extraordinary driving permission means, when the extraordinary driving operation means is operated, sets the result of alcohol detection by the alcohol detector on condition that the total number of operations including the current operation is equal to or less than the allowable number of operations A drunk driving prevention system characterized by allowing driving of a vehicle regardless.

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