JP2008204213A - On-vehicle drinking detector and drink drive prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle drinking detector and a drink drive prevention device, improved to accurately perform drinking determination by preventing false determination of drinking by fueling, so that a situation such that engine restart cannot be performed in spite of non-drinking after fueling can be eliminated. <P>SOLUTION: The on-vehicle drinking detector comprises an alcohol concentration sensor set in the vicinity of a driver's seat of a vehicle to detect an alcohol concentration; a drinking determination means which determines drinking of a driver based on the alcohol concentration detected by the alcohol concentration sensor; a fueling determination means which detects that the vehicle is fueled; and a drinking determination prohibiting means which prohibits, when the fueling is determined by the fueling determination means, the drinking determination based on the alcohol concentration detected by the alcohol concentration sensor by the drinking determination means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an in-vehicle drinking detection device and a drunk driving prevention device used for vehicles such as automobiles, and more particularly to an in-vehicle drinking detection device and a drunk driving prevention device used for a vehicle using a fuel containing alcohol such as bioethanol. About.

  In recent years, drunk driving of automobiles has become a social problem, and the development of in-vehicle devices that prevent drunk driving is in full swing. Among them, a drunk driving prevention device and a drunk driving prevention vehicle that detect an alcohol concentration contained in a driver's exhalation and make the in-vehicle engine unstartable if the alcohol concentration contained in the exhalation is a predetermined value or more. It has been developed as an effective means to prevent drunk driving.

  The drunk driving prevention device is provided with an alcohol concentration sensor in the vicinity of the driver's seat, and when the alcohol concentration sensor detects an alcohol concentration equal to or higher than a predetermined value, an abnormal signal is output and the engine is stopped based on the abnormal signal. Is prohibited or the alarm device is operated (for example, Patent Documents 1 and 2).

JP 59-220421 A JP 60-76427 A

  In recent years, in response to the global warming and the problem of energy depletion, automakers have developed fuel-efficient vehicles and gasoline, a finite underground resource, to reduce carbon dioxide emissions, the main cause of global warming. Vehicles (engines) that use alternative fuels that do not rely solely on petroleum-based fuels such as oil and light oil are being developed.

  From this point of view, an alternative fuel that has been attracting attention in recent years is bioethanol produced from biomass, and bioethanol is effective in suppressing the use of gasoline and combating global warming. In Western countries, Brazil, etc., a mixed fuel of bioethanol and gasoline or 100% bioethanol alcohol is used as an automobile fuel.

  Alcohol concentration detection by the alcohol concentration sensor of the drunk driving prevention device detects the alcohol concentration in the driver's breath, and is not particularly driven by a suction mask type, but by an alcohol concentration sensor installed near the driver's seat of the vehicle Regardless of the driver's intention, in the case of detecting the alcohol concentration in the driver's breath, since the alcohol concentration present in the air in the passenger compartment is also detected, the air in the passenger compartment contains an alcohol component. Even if the driver is not drinking alcohol, a misjudgment of drinking may occur.

  On the other hand, when alcohol fuels such as ethanol have spread due to the development of alternative fuels, and alternative fuel vehicles supply alcohol fuels at gas stations and other gas stations, highly volatile alcohol fuels are used in the passenger compartment. For this reason, the drunk driving prevention device may cause a misjudgment of drinking even if the driver is not drinking alcohol. When such a misjudgment occurs, there occurs a problem that the engine is not restarted after refueling even though the driver is not drinking.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to prevent misjudgment of drinking due to refueling, to correctly determine drinking, and to restart the engine after refueling although it is not drunk An object of the present invention is to provide an in-vehicle drinking detection device and a drunk driving prevention device which are improved so as not to cause a problem.

  In order to achieve the above object, an in-vehicle drinking detection device according to the present invention is installed in the vicinity of a driver's seat of a vehicle, detects an alcohol concentration, and detects the alcohol concentration detected by the alcohol concentration sensor. An in-vehicle drinking detection device having a drinking determination unit for determining drinking, and when it is determined that refueling has been performed by the refueling determination unit for determining that the vehicle has refueled, and the refueling determination unit, The drinking determination means includes drinking determination prohibiting means for prohibiting the determination of drinking based on the alcohol concentration detected by the alcohol concentration sensor.

  The in-vehicle drinking detection device according to the present invention is preferably configured such that the drinking determination prohibiting unit prohibits the drinking determination based on the alcohol concentration detected by the alcohol concentration sensor until a predetermined time elapses after refueling, and after the predetermined time has elapsed, It is characterized by restarting the drinking determination.

  The in-vehicle drinking detection device according to the present invention preferably prohibits the drinking determination by the alcohol concentration sensor detected by the alcohol concentration sensor until the drinking determination prohibiting means travels a predetermined distance or a predetermined time after refueling. The drinking determination is resumed after traveling for a predetermined distance or after traveling for a predetermined time.

  In the in-vehicle drinking detection device according to the present invention, preferably, the refueling determination means determines whether or not the vehicle has stopped at the refueling station for a predetermined time based on the vehicle position information and map information of the in-vehicle navigation system. It is characterized by determining whether or not.

  In the vehicle-mounted drinking detection device according to the present invention, preferably, the fueling determination means determines whether or not fueling has been performed depending on whether a fueling button for opening the fueling port door of the vehicle is on or whether the fueling port of the vehicle is open. It is characterized by determining.

  The on-vehicle drinking detection device according to the present invention is preferably characterized in that the fuel supply determination means determines whether or not fuel supply has been performed based on whether or not the remaining amount of fuel in the fuel tank mounted on the vehicle has increased.

  In order to achieve the above object, an in-vehicle drinking detection device according to the present invention is installed in the vicinity of a driver's seat of a vehicle, and includes a first alcohol concentration sensor that exclusively detects an alcohol concentration contained in the expiration of a vehicle driver. A drinking determination means for determining the driver's drinking based on the alcohol concentration detected by the first alcohol concentration sensor; and a second alcohol concentration sensor for detecting the alcohol concentration contained in the outside air introduced into the passenger compartment. When the alcohol concentration detected by the second alcohol concentration sensor is greater than or equal to a predetermined value, the alcohol determination unit is prohibited from performing the alcohol determination based on the alcohol concentration detected by the first alcohol concentration sensor. And a drinking determination prohibiting means.

  In order to achieve the above object, a drunk driving prevention apparatus according to the present invention is a drunk driving prevention apparatus for preventing a drunk person from driving a vehicle, the in-vehicle drinking detection apparatus according to the above-described invention, and the in-vehicle drinking detection. The apparatus includes a driving prohibiting unit that prohibits driving of the vehicle when the drinking determination unit of the apparatus determines that the vehicle is drinking.

  The drunk driving prevention apparatus according to the present invention is preferably characterized by further comprising a driving restriction means for restricting the driving of the vehicle when the drinking judgment by the drinking judgment means is prohibited.

  According to the on-vehicle drinking detection device of the present invention, when the oil supply determination unit determines that the vehicle has been refueled, and the oil supply determination unit determines that the fuel has been supplied, the alcohol determination sensor detects the alcohol consumption determination unit. It is prohibited by the drinking determination prohibiting means to perform the drinking determination based on the alcohol concentration to be determined, so that it is possible to prevent erroneous determination of drinking due to alcohol fuel during refueling.

  Embodiments of an in-vehicle drinking detection device and a drunk driving prevention device according to the present invention will be described with reference to the drawings.

FIG. 1 shows Embodiment 1 of an in-vehicle drinking detection device and a drunk driving prevention device according to the present invention.
The on-vehicle drinking detection device and the drunk driving prevention device of the present embodiment include an alcohol concentration sensor 11, a drinking determination unit 21, and a driving prohibition processing unit (driving prohibition unit) 31.
The alcohol concentration sensor 11 is installed in the vicinity of the driver's seat of the vehicle, and exclusively detects the alcohol concentration contained in the exhalation of the driver seated on the driver's seat. The alcohol concentration sensor 11 indicates a higher sensor output value (for example, voltage value) as the sampled alcohol concentration is higher. The alcohol concentration sensor 11 may be a suction type having a suction pump.

  The drinking determination means 21 has a comparator 22, compares the alcohol concentration detected by the alcohol concentration sensor 11 by the comparator 22 with the first comparison value (drinking determination value) by the comparison value setting unit 23, If the alcohol concentration (alcohol concentration sensor value) detected by the concentration sensor 11 is greater than or equal to the drinking determination value, it is determined to be drinking, and a driving prohibition command is output from the driving prohibition command output processing unit 24 (driving prohibition means). To 31.

  The driving prohibition processing unit 31 operates by receiving a driving prohibition command from the driving prohibition command output processing unit 24, and performs processing for prohibiting driving of the vehicle. That is, the driving prohibition processing unit 31 performs a process of prohibiting driving of the vehicle when the drinking determination means 21 determines that it is drinking. Thereby, drunk driving is prevented.

  The driving prohibition processing unit 31 performs processing such as prohibiting the engine restart if the vehicle is stopped, prohibiting acceleration and quickly decelerating and stopping safely if the vehicle is running, for example, What is necessary is just to process so that it can stop quickly and safely according to vehicle information, such as a vehicle speed, a steering angle, and an accelerator opening. In addition, in consideration of the case where the vehicle is stopped on the road, for example, a driving prohibition process that restricts the maximum speed and the movable distance so that the vehicle can be moved to a safe place even if it is parked, such as a shoulder or a parking space. You may go.

  Sensor signal output control means 41 is provided in the middle of the transmission path for transmitting the output signal (sensor signal) of the alcohol concentration sensor 11 from the alcohol concentration sensor 11 to the drinking determination means 21. The sensor signal output control means 41 is like a switch circuit, and is a steady mode in which the latest sensor signal output from the alcohol concentration sensor 11 is output to the drinking determination means 21 and the latest sensor signal output from the alcohol concentration sensor 11. Is switched to a drinking determination prohibiting mode in which an initial concentration signal (for example, a zero concentration signal) is output to the drinking determination means 21, and acts as a drinking determination prohibiting means.

  The sensor signal output control means 41 inputs a logic output of an AND gate 53 to be described later. When the logic output of the AND gate 53 is “0”, the sensor signal output control means 41 switches to a steady mode, and the logic output of the AND gate 53 is “1”. If it is “”, it switches to the drinking judgment prohibition mode.

  The in-vehicle drinking detection device and the drunk driving prevention device of the present embodiment further include an oil supply determination unit 51 and a delay circuit 52. The refueling determination means 51 determines whether or not the vehicle has refueled at a refueling station or the like. When it is determined that the vehicle is refueling, “1” is set. Set “0”. As a result, when refueling is completed, the output of the refueling determination means 51 (refueling determination output) changes from “1” to “0”.

Here, a specific example of the fuel supply determination means 51 will be described with reference to FIG.
The refueling determination means 51 includes the vehicle position information transmitted from the external information output unit 73 provided in the in-vehicle navigation system 71, the on / off information of the refueling button for opening the refueling port door provided in the vehicle body, At least one of the opening / closing information of the mouth sensor and the fuel remaining amount information of the fuel tank mounted on the vehicle is input, and at least one of the first fueling determination unit 511, the second fueling determination unit 512, and the third fueling determination unit 513 is input. The oiling judgment is performed by one.

  The navigation system 71 includes a host vehicle position detection unit 72 and an external information output unit 73. The own vehicle position detection unit 72 inputs GPS, a gyroscope, a distance sensor, map data, etc., detects the own vehicle position from these information, and whether or not the own vehicle is at or near the gas station (gas station). If it is determined that the vehicle is located at or near the gas station, the information is output to the external information output unit 73. When the external information output unit 73 inputs information indicating that the vehicle is determined to be at or near the fueling station, the external information output unit 73 sets a corresponding flag and transmits the flag to the first fueling determination unit 511 of the fueling determination unit 51.

  In addition to the flag input from the external information output unit 73, the first refueling determination unit 511 inputs information of an ignition switch (system start switch) that is a key operation of the driver. Since the ignition switch is usually turned off during refueling, the first refueling determination unit 511 receives the above-mentioned flag from the external information output unit 73 and the ignition switch is off. When the ignition switch is turned on for restarting after that, it is determined that refueling has been performed, and “1” is set. That is, the first refueling determination unit 511 performs the refueling determination based on whether the vehicle has stopped at the refueling station for a predetermined time based on the vehicle position information and the map information of the navigation system 71.

  The second refueling determination unit 512 inputs fuel remaining amount information from a fuel gauge provided in a fuel tank mounted on the vehicle. If the remaining fuel amount increases, it determines that refueling has been performed and sets “1”. set. That is, the second refueling determination unit 512 determines whether or not refueling has been performed based on whether or not the remaining amount of fuel in the fuel tank mounted on the vehicle has increased.

  The third fueling determination unit 513 is an electric fueling button (fuel lid opener) or a logical value “indicating that the fueling button is pressed or the fueling port is opened in a system having a sensor at the fueling port. When “1” is input from the OR gate 514 and the logical output “1” of the OR gate 515 continues for a predetermined time, it is determined that refueling has been performed, and “1” is set. That is, the third refueling determination unit 513 determines whether refueling has been performed based on whether the refueling button that opens the refueling port door is on or whether the refueling port of the vehicle is open.

  The outputs of the first oil supply determination unit 511, the second oil supply determination unit 512, and the third oil supply determination unit 513 are input to an OR gate 515 on the output side. If at least one of the outputs of the first oil supply determination unit 511, the second oil supply determination unit 512, and the third oil supply determination unit 513 is “1”, the OR gate 515 outputs the output of the oil supply determination unit 51 to “1”. Set to "".

  In the present embodiment, the output of the oil supply determination unit 51 is an OR condition of the outputs of the first oil supply determination unit 511, the second oil supply determination unit 512, and the third oil supply determination unit 513. Conditions, for example, the logical product of the outputs of the first oil supply determination unit 511 and the second oil supply determination unit 512, the logical product of the first oil supply determination unit 511 and the third oil supply determination unit 513, the second oil supply determination unit The output (oil supply determination result) of the oil supply determination unit 51 may be set by a logical product of 512 and the output of the third oil supply determination unit 513 or the like.

  The delay circuit 52 continues to output “1” by delay processing until a predetermined time has elapsed from the time when the oil supply determination output of the oil supply determination means 51 changes from “1” to “0”, and thereafter Then, “0” is output until the oil supply determination output of the oil supply determination means 51 becomes “1” again.

  The time (delay time) that the delay circuit 52 continues to output “1” from the time when the fuel supply determination output changes from “1” to “0” is generated by the fuel supply from the first ignition switch on after the fuel supply. What is necessary is just to set time required for the alcohol concentration in a vehicle interior to fall to the density | concentration which does not affect a drinking determination density | concentration.

  The AND gate 53 inputs the output of the delay circuit 52 and the output of the comparator 54. The comparator 54 compares the alcohol concentration detected by the alcohol concentration sensor 11 with the second comparison value set by the comparison value setting unit 55, and the alcohol concentration detected by the alcohol concentration sensor 11 is compared with the second comparison value. If it is greater than or equal to the value, "1" is output, otherwise "0" is output.

  As a result, if the alcohol concentration detected by the alcohol concentration sensor 11 is equal to or higher than the second comparison value during the refueling or after the predetermined time has elapsed after the refueling, the logical output of the AND gate 53 is “ The sensor signal output control means 41 is switched to the drinking determination prohibiting mode, and an initial concentration signal, for example, a zero concentration signal is input to the drinking determination means 21. For this reason, the comparison result between the alcohol concentration and the drinking determination value by the comparator 22 is always lower than the drinking determination value, and the alcohol concentration is not determined as drinking.

  Therefore, the alcohol concentration detected by the alcohol concentration sensor 11 is equal to or higher than the drinking determination value until a predetermined time has elapsed during which the alcohol concentration sensor 11 is considered not to be affected by the alcohol concentration due to the refueling. Even if it exists, it is not determined that the alcohol is consumed, and the driving prohibition command output processing unit 24 does not output the driving prohibition command to the driving prohibition processing unit 31.

  As a result, the vehicle interior is filled with alcohol by refueling, and even if the alcohol concentration detection value by the alcohol concentration sensor 11 increases, it is not determined that alcohol is consumed, and misjudgment of alcohol is prevented. Thereafter, it is possible to avoid a trouble that the engine is not restarted even though the user has not drunk.

  After the completion of refueling, when a predetermined time is considered that the alcohol concentration sensor 11 is not affected by the alcohol concentration due to refueling, the output of the delay circuit 52 becomes “0”, so that the logical output of the AND gate 53 becomes “0”. The sensor signal output control unit 41 is switched to the steady mode in which the latest sensor signal output from the alcohol concentration sensor 11 is output to the drinking determination unit 21.

  Thus, when a predetermined time has elapsed after the completion of refueling, the drinking determination unit 21 resumes the drinking determination based on the latest sensor signal, and if the alcohol concentration detected by the alcohol concentration sensor 11 is equal to or higher than the drinking determination value, the drinking The operation prohibition command output processing unit 24 outputs an operation prohibition command to the operation prohibition processing unit (operation prohibition means) 31. As a result, the driving prohibition processing unit 31 performs the required driving prohibition processing, thereby promptly prohibiting driving and preventing drunk driving.

  In this embodiment, in order to further improve the safety of drunk driving prevention, the driving restriction command output processing unit 56 that operates by inputting the logical output of the AND gate 53 is provided. The driving restriction command output processing unit 56 outputs the driving restriction command to the driving restriction processing unit 61 during a period when the logical output of the AND gate 53 is “1”, that is, during a period when the driving prohibition process based on the drinking determination is not performed.

  The driving restriction processing unit 61 permits the engine restart, but performs a process of prohibiting sudden start or limiting the maximum vehicle speed. Thereby, in order to prevent misjudgment of drinking due to refueling, safe driving performance is improved in a period in which driving prohibition processing by drinking determination is not performed.

  Note that the comparison calculation in the comparators 22 and 54 may be either the sensor output (for example, voltage value) of the alcohol concentration sensor 11 or the one after being converted into a physical value (for example, mg / L).

Next, the control flow of the first embodiment will be described with reference to FIG.
First, it is determined whether or not the alcohol concentration sensor value (latest value) output from the alcohol concentration sensor 11 is equal to or greater than a predetermined value (second comparison value) (step S11). If the alcohol concentration sensor value is less than the predetermined value, the latest alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S15). On the other hand, if the alcohol concentration sensor value is greater than or equal to the predetermined value, it is next determined whether or not refueling has been performed (step S12). This determination is performed based on the fuel supply determination result output from the fuel supply determination means 51.

  If it is determined that refueling has not been performed, the latest alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S15). On the other hand, when it is determined that refueling has been performed, thereafter, an operation restriction process is performed until a predetermined time elapses (steps S13 and S14).

  As a result, the latest alcohol concentration sensor value is not transmitted to the drinking determination means 21 during refueling or until a predetermined time elapses after the completion of refueling, and the alcohol concentration referred to by the drinking determination means 21 is the initial concentration signal. For example, even if the alcohol concentration detected by the alcohol concentration sensor 11 is a zero concentration signal and the alcohol concentration due to refueling is greater than or equal to the drinking determination value, the drinking determination means 21 may erroneously determine drinking. Absent.

  If it is considered that the alcohol concentration sensor 11 has not been affected by the alcohol concentration due to the refueling after the determination of refueling execution, the latest alcohol concentration sensor value is output to the drinking determination means 21 (step S21). S15).

  Thereby, if predetermined time passes after determination of refueling execution, the newest alcohol concentration sensor value will be sent to the drinking determination means 21, and the drinking determination means 21 will perform drinking determination with reference to the newest alcohol concentration sensor value. (Step S16). If the latest alcohol concentration sensor value is equal to or higher than the drinking determination value, it is determined to be drinking and a driving prohibition process is performed (step S17).

  FIG. 4 shows Embodiment 2 of the in-vehicle drinking detection device and the drunk driving prevention device according to the present invention. 4, parts corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted.

  In the present embodiment, a travel determination unit 57 is provided in place of the delay circuit 52 of the first embodiment. The travel determination means 57 inputs vehicle information such as the vehicle speed and the engine speed, and the vehicle travels for a predetermined time from when the fuel supply determination output of the fuel supply determination means 51 changes from “1” to “0”. Until the vehicle travels a distance, the output of “1” is continued, and thereafter, “0” is output until the fuel supply determination output of the fuel supply determination means 51 becomes “1” again. The predetermined time travel or the predetermined distance travel may be set in accordance with the travel time or the travel distance in which the alcohol concentration sensor 11 is considered not to be affected by the alcohol concentration due to refueling.

  As a result, if the alcohol concentration detected by the alcohol concentration sensor 11 is equal to or higher than the second comparison value during a period of running for a predetermined time or running for a predetermined distance after refueling or after completion of refueling, AND is performed. The logic output of the gate 53 becomes “1”, the sensor signal output control means 41 switches to the drinking determination prohibiting mode, and an initial concentration signal, for example, a zero concentration signal is input to the drinking determination means 21. For this reason, the comparison result between the alcohol concentration and the drinking determination value by the comparator 22 is always lower than the drinking determination value, and the alcohol concentration is not determined as drinking.

  Therefore, alcohol is detected by the alcohol concentration sensor 11 during or after the completion of refueling until the alcohol concentration sensor 11 travels for a predetermined time or travels for a predetermined distance, which is considered not to be affected by the alcohol concentration. Even if the concentration is equal to or higher than the drinking determination value, it is not determined to be drinking, and the driving prohibition command output processing unit 24 does not output a driving prohibition command to the driving prohibition processing unit 31.

  As a result, even in this embodiment, even if the vehicle interior is filled with alcohol due to refueling, and even if the alcohol concentration sensor 11 detects a high alcohol concentration detection value, it is not determined that alcohol is consumed. It is avoided that after the refueling, there is a problem that the engine restart is not performed even though the alcohol is not drunk.

Next, the control flow of the second embodiment will be described with reference to FIG.
First, it is determined whether or not the alcohol concentration sensor value (latest value) output from the alcohol concentration sensor 11 is equal to or greater than a predetermined value (second comparison value) (step S21). If the alcohol concentration sensor value is less than the predetermined value, the latest alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S25). On the other hand, if the alcohol concentration sensor value is equal to or greater than the predetermined value, it is next determined whether or not refueling has been performed (step S22). This determination is performed based on the fuel supply determination result output from the fuel supply determination means 51.

  If it is determined that refueling is not performed, the latest alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S25). On the other hand, if it is determined that refueling has been performed, then the operation restriction process is performed until traveling for a predetermined time or traveling for a predetermined distance is performed (steps S23 and S24).

  As a result, the latest alcohol concentration sensor value is not transmitted to the drinking determination means 21 until the driving for a predetermined time or driving for a predetermined distance after refueling or after completion of refueling. The alcohol concentration that is used is an initial concentration signal, for example, a zero concentration signal, and even if the alcohol concentration detected by the alcohol concentration sensor 11 is affected by the alcohol concentration due to refueling and is above the drinking determination value, the drinking determination means 21 is not mistaken for drinking.

  If it is considered that the running of a predetermined time or the running of a predetermined distance is performed after the determination of the refueling execution and the alcohol concentration sensor 11 is not affected by the alcohol concentration due to the refueling, the latest alcohol concentration sensor value is obtained. It outputs to the drinking determination means 21 (step S25).

  As a result, after the determination of refueling execution, when traveling for a predetermined time or traveling for a predetermined distance is performed, the latest alcohol concentration sensor value is sent to the drinking determination means 21, and the drinking determination means 21 is updated to the latest alcohol concentration sensor. Drinking determination is performed with reference to the value (step S26). If the latest alcohol concentration sensor value is equal to or higher than the drinking determination value, it is determined that the alcohol has been drunk and a driving prohibition process is performed (step S27).

  FIG. 6 shows Embodiment 3 of the in-vehicle drinking detection device and the drunk driving prevention device according to the present invention. In FIG. 6, parts corresponding to those in FIGS. 1 and 4 are denoted by the same reference numerals as those in FIGS. 1 and 4, and description thereof is omitted.

  In the present embodiment, the alcohol concentration sensor 11 in the first and second embodiments is referred to as the first alcohol concentration sensor 11 and is installed in the vicinity of the driver's seat of the vehicle, as in the first and second embodiments. The alcohol concentration contained in the expiration of the driver sitting on the seat is detected.

  Further, in the present embodiment, separately from the first alcohol concentration sensor 11, the alcohol concentration contained in the outside air that is installed in the outside air introduction port or the engine room or the like into the vehicle interior is detected and detected. A second alcohol concentration sensor 81 for detecting the above is provided. The installation location of the second alcohol concentration sensor 81 is not limited to this as long as it can detect the alcohol concentration contained in the outside air introduced into the vehicle interior. The sensor signal of the second alcohol concentration sensor 81 is input to the comparator 82.

  The comparator 82 compares the alcohol concentration detected by the second alcohol concentration sensor 81 with the third comparison value set by the comparison value setting unit 83, and the alcohol detected by the second alcohol concentration sensor 81. If the concentration is equal to or higher than the third comparison value, “1” is output as refueling is performed, and “0” is output otherwise. The output of the comparator 82 is input to the travel determination means 57.

  The travel determination unit 57 inputs the output of the comparator 82 in place of the fuel supply determination output of the fuel supply determination unit 51 of the second embodiment, inputs vehicle information such as the vehicle speed and the engine speed, and outputs the output of the comparator 82. The output of “1” is continued until the vehicle travels for a predetermined time or travels a predetermined distance from the time when “1” changes from “1” to “0”, and thereafter, the output of the comparator 82 becomes “ “0” is output until it becomes “1”. Here, the predetermined time travel or the predetermined distance travel may be set according to the travel time or the travel distance in which the first alcohol concentration sensor 11 is considered not to be affected by the alcohol concentration due to refueling.

  As a result, when it is determined that refueling has been performed because the alcohol concentration detected by the second alcohol concentration sensor 81 is equal to or greater than the third comparison value, traveling for a predetermined time or traveling for a predetermined distance thereafter. If the alcohol concentration detected by the first alcohol concentration sensor 11 is equal to or higher than the second comparison value in the period during which the AND signal 53 is performed, the logical output of the AND gate 53 becomes “1”, and the sensor signal output control means 41 switches to the drinking determination prohibition mode, and an initial concentration signal, for example, a zero concentration signal is input to the drinking determination means 21. For this reason, the comparison result between the alcohol concentration and the drinking determination value by the comparator 22 is always lower than the drinking determination value, and the alcohol concentration is not determined as drinking.

  Accordingly, the first alcohol concentration sensor does not travel from the first alcohol concentration sensor 11 for a predetermined time or a predetermined distance that is considered not to be affected by the alcohol concentration due to the refueling during or after refueling. Even if the alcohol concentration detected by 11 is equal to or higher than the drinking determination value, it is not determined to be drinking, and the driving prohibition command output processing unit 24 does not output a driving prohibition command to the driving prohibition processing unit 31.

  As a result, even in this embodiment, even if the vehicle interior is filled with alcohol due to refueling, and even if the detection value of the alcohol concentration by the first alcohol concentration sensor 11 becomes high, it is not determined that alcohol is consumed. It is possible to prevent the occurrence of a malfunction such that the engine restart is not performed even after having not drunk alcohol after refueling.

  In the present embodiment, since the alcohol concentration in the vehicle compartment can be detected by the second alcohol concentration sensor 81, it can be accurately detected that the alcohol concentration in the vehicle compartment has been increased by refueling, and erroneous determination of drinking during refueling is ensured. Can be avoided.

  If the alcohol concentration detected by the second alcohol concentration sensor 81 decreases, the sensor signal output control means 41 is switched to the steady mode without waiting for a predetermined time and a predetermined distance, and the first alcohol concentration sensor The drinking determination may be resumed by the latest alcohol concentration sensor value output by 11.

Next, the control flow of the third embodiment will be described with reference to FIG.
First, it is determined whether or not the first alcohol concentration sensor value (latest value) output from the first alcohol concentration sensor 11 is equal to or greater than a predetermined value (second comparison value) (step S31). If the first alcohol concentration sensor value is less than the predetermined value, the latest first alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S35). On the other hand, if the first alcohol concentration sensor value is equal to or greater than the predetermined value, then the second alcohol concentration sensor value output from the second alcohol concentration sensor 81 is equal to or greater than the predetermined value (third comparison value). It is determined whether or not (step S31).

  If the second alcohol concentration sensor value is less than the predetermined value, it is determined that refueling is not performed, and the latest first alcohol concentration sensor value is output to the drinking determination means 21 as it is (step S35). On the other hand, if the second alcohol concentration sensor value is equal to or greater than a predetermined value, it is determined that refueling has been performed, and thereafter, a driving restriction process is performed until traveling for a predetermined time or traveling for a predetermined distance is performed ( Steps S33, 34).

  As a result, the latest first alcohol concentration sensor value is not transmitted to the drinking determination means 21 until the traveling for a predetermined time or traveling for a predetermined distance after refueling or after the completion of refueling, and the drinking determination means 21. The alcohol concentration referred to is an initial concentration signal, for example, a zero concentration signal, and the alcohol concentration detected by the first alcohol concentration sensor 11 is affected by the alcohol concentration by refueling and is above the drinking determination value. However, the drinking determination means 21 does not erroneously determine drinking.

  After the second alcohol concentration sensor value becomes equal to or greater than the predetermined value, traveling for a predetermined time or traveling for a predetermined distance is performed, and the first alcohol concentration sensor 11 is not affected by the alcohol concentration due to refueling. If it is considered, the latest first alcohol concentration sensor value is output to the drinking determination means 21 (step S35).

  Thereby, after refueling, when traveling for a predetermined time or traveling for a predetermined distance is performed, the latest first alcohol concentration sensor value is sent to the drinking determination means 21, and the drinking determination means 21 is updated to the latest first. Alcohol concentration determination is performed with reference to the alcohol concentration sensor value (step S36). If the latest first alcohol concentration sensor value is equal to or higher than the drinking determination value, it is determined to be drinking and a driving prohibition process is performed (step S37).

  The present invention relates to an alcohol concentration detection technique for preventing drunk driving of a vehicle.

The block diagram which shows Embodiment 1 of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus by this invention. The block diagram which shows the detail of the oil supply determination means used for the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus of Embodiment 1. FIG. The flowchart which shows the control flow of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus of Embodiment 1. FIG. The block diagram which shows Embodiment 2 of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus by this invention. The flowchart which shows the control flow of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus of Embodiment 2. FIG. The block diagram which shows Embodiment 3 of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus by this invention. The flowchart which shows the control flow of the vehicle-mounted drinking detection apparatus and drunk driving prevention apparatus of Embodiment 3.

Explanation of symbols

11 Alcohol concentration sensor (first alcohol concentration sensor)
DESCRIPTION OF SYMBOLS 21 Drinking determination means 22 Comparator 23 Comparison value setter 24 Operation prohibition command output process part 31 Operation prohibition process part 41 Sensor signal output control means 51 Oil supply determination means 511 1st oil supply determination part 512 2nd oil supply determination part 513 1st Third oil supply determination unit 514, 515 OR gate 52 Delay circuit 53 AND gate 54 Comparator 55 Comparison value setter 56 Operation limit command output processing unit 57 Travel determination means 61 Operation limit processing unit 71 Navigation system 72 Own vehicle position detection unit 73 External information output unit 81 Second alcohol concentration sensor 82 Comparator 83 Comparison value setter

Claims (9)

An in-vehicle drinking detection device installed in the vicinity of a driver's seat of a vehicle and having an alcohol concentration sensor for detecting an alcohol concentration and a drinking determination means for determining a driver's drinking based on the alcohol concentration detected by the alcohol concentration sensor. ,
Refueling determination means for determining that the vehicle has refueled;
When it is determined that refueling has been performed by the refueling determination unit, the drinking determination prohibiting unit prohibits the drinking determination unit from performing a drinking determination based on the alcohol concentration detected by the alcohol concentration sensor;
An in-vehicle drinking detection device characterized by comprising:   The alcohol drinking determination prohibiting unit prohibits a drinking determination based on an alcohol concentration detected by the alcohol concentration sensor until a predetermined time elapses after refueling, and restarts the drinking determination after a predetermined time has elapsed. The in-vehicle drinking detection device according to 1.   The drinking determination prohibiting means prohibits the drinking determination based on the alcohol concentration detected by the alcohol concentration sensor until refueling, driving for a predetermined distance or for a predetermined time, and after driving for a predetermined distance or for a predetermined time. The in-vehicle drinking detection device according to claim 1, wherein drinking determination is resumed.   The refueling determination means determines whether or not refueling has been performed based on whether or not the vehicle has stopped at a refueling station for a predetermined time based on the vehicle position information and map information of an in-vehicle navigation system. The in-vehicle drinking detection device according to any one of claims 1 to 3.   The fueling determination means determines whether or not fueling has been performed based on whether a fueling button for opening a fueling port door of the vehicle is on or whether a fueling port of the vehicle is open. The in-vehicle drinking detection device according to any one of 3.   4. The fuel supply determination unit according to claim 1, wherein the fuel supply determination unit determines whether or not fuel supply has been performed based on whether or not a remaining amount of fuel in the fuel tank mounted on the vehicle has increased. In-vehicle drinking detection device. A first alcohol concentration sensor that is installed in the vicinity of the driver's seat of the vehicle and exclusively detects alcohol concentration contained in the expiration of the vehicle driver;
Alcohol determination means for determining the alcohol consumption of the driver based on the alcohol concentration detected by the first alcohol concentration sensor;
A second alcohol concentration sensor for detecting the alcohol concentration contained in the outside air introduced into the passenger compartment;
When the alcohol concentration detected by the second alcohol concentration sensor is equal to or higher than a predetermined value, the alcohol determination unit prohibits the alcohol determination based on the alcohol concentration detected by the first alcohol concentration sensor. Drinking prohibition means,
An in-vehicle drinking detection device characterized by comprising: A drunk driving prevention device that prevents a drinker from driving a vehicle,
The in-vehicle drinking detection device according to any one of claims 1 to 7,
Driving prohibiting means for prohibiting driving of the vehicle when the drinking determination means of the in-vehicle drinking detection device determines drinking;
A drunk driving prevention apparatus characterized by comprising:   The drunk driving prevention device according to claim 8, further comprising a driving restriction unit that restricts driving of the vehicle when the drinking judgment by the drinking judgment unit is prohibited.

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