JP2011089867A - Detector of vehicular trouble - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detector of a vehicular trouble for reliably executing detection of trouble in an engine stop state. <P>SOLUTION: The detector of vehicular trouble is mounted on a vehicle, includes a trouble detection execution means of executing detection of trouble of equipment mounted on a vehicle, and starts the trouble detection execution means in a stop state of an engine mounted on the vehicle to execute trouble detection. In the detector of vehicular trouble, start time of the engine is stored successively each time when the engine is started (S110), stop time of the engine is stored successively each time when the engine stop is detected (S104), a time period of high possibility of an engine stop state is calculated based on the stored start time and stop time (S106, S112, S114), it is determined whether the time period is the calculated one when the engine stop is detected (S24), and the trouble detection execution means is started when it is determined that the time period is the calculated one (S26). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle abnormality detection device, and more specifically to a device that performs abnormality detection of equipment mounted on a vehicle when an engine mounted on the vehicle is stopped.

  Conventionally, so-called self-abnormality detection (OBD (On-board diagnostics)) technology that detects an abnormality in equipment mounted on a vehicle with an electronic control unit (ECU) mounted on the vehicle It has been known. For example, in the self-abnormality detection described in the following patent document, a gas leak abnormality of evaporated fuel is detected in a purge device that introduces evaporated fuel from a fuel tank into an intake passage.

  The abnormality detection described in the following patent document detects a gas leak abnormality based on a pressure change in the fuel tank and is executed while the vehicle is running. May not be detected accurately. Therefore, in order to perform abnormality detection when the engine is stopped, it has been considered to postpone the stop of the ECU for a certain time after the engine is stopped, or to restart the ECU after a certain time has elapsed after the engine is stopped.

Japanese Patent No. 3931707 JP 2004-11449 A

  However, depending on the vehicle usage pattern of the driver, for example, the engine may be restarted in a short time even after the engine is stopped. In such a case, the abnormality detection cannot be completed, and as a result, the ECU is wasted. There was a problem of starting up and draining the battery.

  Accordingly, an object of the present invention is to provide a vehicle abnormality detection device that solves the above-described problems and can reliably perform abnormality detection when the engine is stopped.

  In order to achieve the above object, according to claim 1, the apparatus includes an abnormality detection execution unit that is mounted on a vehicle and that detects an abnormality of a device mounted on the vehicle, and the abnormality detection execution unit includes the abnormality detection execution unit. In an abnormality detection device for a vehicle that is activated in a stopped state of an engine mounted on a vehicle and executes the abnormality detection, an engine activation detection unit that detects activation of the engine, and an engine that detects the engine stop Stop detection means, engine start time storage means for sequentially storing the engine start time each time the engine start is detected, and engine stop time are sequentially stored each time the engine stop is detected When the engine is likely to be stopped based on the engine stop time storage means and the stored start time and stop time An engine stop time zone calculating means for calculating a time zone, a time zone determining means for determining whether or not the calculated time zone is in effect when the engine stop is detected, and a time zone determination means being in the calculated time zone. An abnormality detection executing means starting means for starting the abnormality detection executing means when determined is provided.

  In the vehicle abnormality detection device according to claim 2, vehicle position detection means for detecting the position of the vehicle, and the position of the vehicle at the time of starting the engine are sequentially stored each time the activation of the engine is detected. Engine starting vehicle position storage means and engine stop time vehicle position storage means for sequentially storing the position of the vehicle when the engine is stopped each time the engine stop is detected, and the engine stop time zone calculation means Based on the stored start time and stop time, the position of the vehicle when the engine is started, and the position of the vehicle when the engine is stopped, a time zone and a stop position where the engine is likely to be stopped are calculated. In addition, the abnormality detection execution means activation means determines that the detected vehicle position is the stop position when the engine stop is detected, and the calculation When it is determined that the certain time zone, and as configured to start the abnormality detection execution unit.

  In the abnormality detection device for a vehicle according to claim 3, the abnormality detection execution means starting means may detect from the engine stop time to the calculated time zone when the engine stop is detected. Time is calculated, and when the calculated time has elapsed, it is determined that the time is within the calculated time zone, and the abnormality detection execution unit is activated.

  According to the first aspect of the present invention, the apparatus includes an abnormality detection execution unit that is mounted on the vehicle and detects an abnormality of a device mounted on the vehicle, and the abnormality detection execution unit is activated when the engine mounted on the vehicle is stopped. In the vehicle abnormality detection device configured to execute abnormality detection, the engine start time is sequentially stored every time the engine start is detected, and the engine stop time is sequentially stored every time the engine stop is detected. Then, based on the stored start time and stop time, calculate a time zone in which the engine is likely to be stopped, and determine whether the engine is in the calculated time zone when engine stop is detected. When it is determined that it is in the calculated time zone, the configuration is such that the abnormality detection execution means is activated, that is, the vehicle usage pattern of the driver is learned, and the vehicle usage pattern is learned from the learned vehicle usage pattern. It is configured to calculate the time zone where the gin is likely to be in the stopped state, and when the engine stop is detected, the abnormality detection is executed only in that time zone. Detection can be performed reliably. Thereby, the abnormality detection executing means is not started uselessly while the engine is stopped, and the battery is not consumed.

  In the vehicle abnormality detection device according to claim 2, the position of the vehicle at the time of starting the engine is sequentially stored every time the start of the engine is detected, and the vehicle at the time of stopping the engine every time the stop of the engine is detected. Are sequentially stored, and based on the stored start time and stop time, the position of the vehicle when the engine is started, and the position of the vehicle when the engine is stopped, the time zone and the stop position where the engine is likely to be stopped When the engine stop is detected, it is determined that the detected vehicle position is the stop position, and when it is determined that it is in the calculated time zone, the abnormality detection execution means is activated. In this way, the vehicle stop location that is likely to be in the engine stop state is also learned, and when the engine stop is detected, the abnormality detection is performed only when the vehicle is in that location and in that time zone. Owing to this arrangement is executed, it is possible to perform abnormality detection in the stopped state of the engine more reliably.

  In the vehicle abnormality detection device according to claim 3, when the stop of the engine is detected, the time from the engine stop time to the calculated time zone is calculated, and when the calculated time has elapsed, Since it is configured to activate the abnormality detection execution means by determining that it is in the calculated time zone, it is possible to reliably execute abnormality detection in a stopped state of the engine with a simple configuration.

1 is a block diagram generally showing a vehicle abnormality detection device according to an embodiment of the present invention. It is a flowchart which shows operation | movement of the abnormality detection apparatus of FIG. 3 is a flowchart showing another operation executed in parallel with the operation of FIG. 2 in the abnormality detection device of FIG. 1. It is explanatory drawing which shows the engine stop pattern ranking of FIG. It is explanatory drawing which shows the engine starting pattern ranking of FIG. It is explanatory drawing which shows the engine stop time slot | zone ranking of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment for implementing a vehicle abnormality detection device according to the invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram generally showing a vehicle abnormality detection device according to an embodiment of the present invention.

  In FIG. 1, the code | symbol 10 shows an abnormality detection apparatus. The abnormality detection device 10 includes an electronic control unit (ECU (Electronic Control Unit), hereinafter referred to as “ECU”) 12 mounted on a vehicle V such as a four-wheeled vehicle. The ECU 12 includes a microcomputer including a CPU 12a, a ROM 12b, a memory 12c, and the like, and includes a plurality of control units (engine control unit 12d) for controlling the operation of each component such as the engine 14, the transmission 16, and the navigation system 18 of the vehicle V. A transmission control unit 12e and a navigation system control unit 12f).

  Output signals of various necessary sensors (engine speed sensor, vehicle speed sensor, temperature sensor, pressure sensor, GPS signal reception sensor, gyro sensor, etc.) 20 are input to each control unit 12d, 12e, 12f.

  The operations of the engine 14 and the transmission 16 are controlled by the engine control unit 12d and the transmission control unit 12e, respectively, to drive the vehicle V. The navigation system 18 detects the current position of the vehicle V based on the GPS signal, the gyro sensor output signal, and the vehicle speed sensor output signal, and displays the vehicle position on the map data.

  The ECU 12 includes an abnormality detection execution unit 12g. The abnormality detection execution unit 12g receives the output signals of the various sensors 20, and executes an abnormality detection of a device mounted on the vehicle V, for example, the purge device 22. Specifically, the purge device 22 is a device that introduces the evaporated fuel from the fuel tank into the intake passage, and the abnormality detection execution unit 12g controls the operation of a valve that adjusts the inflow and outflow of the evaporated fuel, A gas leak abnormality is detected based on the pressure change. The abnormality detection execution unit 12g also detects a failure of the various sensors 20 themselves.

  The ECU 12 includes a power supply unit 12h. The power supply unit 12h includes a switch circuit 12h1, and connects the control units 12d, 12e, 12f and the battery 24 through the switch circuit 12h1. An ignition switch 26 is connected to the switch circuit 12h1, and the switch circuit 12h1 is turned on when an ignition signal is input, and supplies power from the battery 24 to the control units 12d, 12e, and 12f.

  Each control unit 12d, 12e, and 12f is activated when power is supplied, and controls the operation of each of the components 14, 16, and 18. When the ignition switch 26 is turned off, the switch circuit 12h1 cuts off the power supply to the control units 12d, 12e, and 12f, and stops the operations of the control units 12d, 12e, and 12f.

  The ignition signal is also transmitted to the engine control unit 12d, and the engine control unit 12d activates the engine 14 based on the ignition signal. On the other hand, when the ignition switch 26 is turned off, the engine control unit 12d stops the engine 14.

  The ignition signal is also transmitted to the navigation system control unit 12f, and when the ignition switch 26 is turned on, the navigation system control unit 12f stores the time immediately after that (engine start time) and the vehicle position (vehicle position at engine start) in the memory 12c. To remember. Further, when the ignition switch 26 is turned off, the navigation system control unit 12f stores the time immediately before (engine stop time) and the vehicle position (vehicle position when the engine is stopped) in the memory 12c.

  The power supply unit 12h includes a timer 12h2. The timer 12h2 is connected to the switch circuit 12h1. As will be described later, when the timer value set after the stop of the engine 14 is detected as zero, the timer 12h2 operates the switch circuit 12h1 to supply the power of the battery 24 to the abnormality detection execution unit 12g. The detection execution unit 12g is activated. That is, the abnormality detection execution unit 12g is activated when the engine is stopped, and detects abnormality of the on-vehicle equipment and the sensor itself. Note that the abnormality detection performed by the abnormality detection execution unit 12g is executed when the engine is stopped, and thus consumes the power of the battery 24.

  Battery power is constantly supplied to the power supply unit 12h of the ECU 12, and the power supply unit 12h executes a program shown below. In addition, since the process by the power supply unit 12h is limited to the calculation of the following program and the timer setting, the battery power consumption is very small.

  FIG. 2 is a flowchart showing the program, that is, the operation of the vehicle abnormality detection device 10 according to the embodiment of the present invention. This program is executed every predetermined time, for example, 10 msec.

  First, in S10, it is determined whether or not the engine 14 has been switched from the drive state to the stop state. This is determined based on the input ignition signal. If the engine 14 is in the drive state or is already stopped, the determination is negative and the program is terminated. If the determination is affirmative, the process proceeds to S12, and the time when the engine is stopped (engine stop time) and the vehicle position Read (vehicle position when the engine is stopped).

  Next, in S14, the engine stop time zone ranking is read. The engine stop time zone ranking is obtained by ranking the time zones and places (stop positions) where the engine 14 is likely to be stopped, which is obtained by learning the vehicle usage pattern of the driver. The engine stop time zone ranking is created in a program executed in parallel with this program in the power supply unit 12h.

  Before continuing the description of the program of FIG. 2, the engine stop time zone ranking creation program will be described first.

  FIG. 3 is a flowchart showing a program for creating an engine stop time zone ranking. This program is executed every predetermined time, for example, every 100 msec.

  In S100, it is determined whether or not the engine 14 is being driven. If the ignition signal is a signal indicating an on state, the determination is affirmative and the process proceeds to S102, where it is determined based on the ignition signal whether or not the engine 14 has been switched from the drive state to the stop state.

  If the result in S102 is negative, the program is terminated as it is. If the result is affirmative, the program proceeds to S104 and the engine stop time and the vehicle position at the time of engine stop are read from the memory 12c, and then the program proceeds to S106 to create an engine stop pattern ranking ( Update.

  As shown in FIG. 4, the engine stop pattern ranking is a time zone in which the engine is stopped frequently based on the engine stop time and the vehicle position at the time of the engine stop that are sequentially stored every time the stop of the engine 14 is detected. 30 minutes unit) and place (stop position). In S106, the number of times is rewritten, and when the rank is changed, the engine stop pattern ranking is newly created (updated).

  On the other hand, if the ignition signal is a signal indicating an off state in S100, the determination is negative and the routine proceeds to S108, where it is determined whether or not the engine 14 has been started. When the result in S108 is negative, the program is terminated as it is. When the result is affirmative, the program proceeds to S110, and the engine start time and the engine start vehicle position are read from the memory 12c. Next, in S112, engine start pattern ranking is created (updated).

  As shown in FIG. 5, the engine start pattern ranking is a time period in which the engine 14 is frequently started based on the engine start time and the engine start time vehicle position that are sequentially stored every time the start of the engine 14 is detected. They are ranked according to (30-minute unit) and place (stop position). In S112, the number of times is rewritten, and when the order is changed, the engine start pattern ranking is newly created (updated).

  Next, in S114, engine stop time zone ranking is created (updated) as shown in FIG. 6 based on the engine stop pattern ranking and engine start pattern ranking created (updated) in S106 and S112.

  Returning to the description of the flow chart of FIG. 2, the program then proceeds to S16, where the vehicle position at the time of engine stop read in the current program loop is higher in the engine stop time zone ranking (first and second) shown in FIG. It is determined whether or not the place is ranked (home or company).

  If the result in S16 is negative, the program is terminated. If the result is affirmative, the program proceeds to S18 to calculate a timer value. Here, the timer value is calculated based on the engine stop time, the vehicle position at the time of engine stop, and the engine stop time zone ranking read in the current program loop.

  Specifically, for example, when the engine stop time read in this program loop is 9:15 and the vehicle position at the time of engine stop is a company, the second stop of the engine stop time zone ranking The time until 11:00, that is, 105 minutes is used as the timer value. Further, for example, when the engine stop time read in the current program loop is 18:20 and the vehicle position at the time of engine stop is home, the time 3 ahead of the time zone ranked first in the engine stop time zone ranking The time until 0:00, that is, 520 minutes is set as the timer value.

  Next, in S20, the timer value calculated in the timer 12h2 is set and started. Next, in S22, the supply of power to the main control unit of the ECU 12, that is, the engine control unit 12d, the transmission control unit 12e, and the navigation system control unit 12f is cut off and stopped.

  Next, in S24, it is determined whether or not the timer value has become zero. If the result in S24 is affirmative, it is determined that the time period in which the engine 14 is likely to be in a stopped state has been reached. Therefore, the process proceeds to S26 to supply power to the abnormality detection execution unit 12g and start it. In addition to abnormality detection, abnormality detection of various sensors 20 itself is started.

  The abnormality detection of the various sensors 20 itself is performed based on whether or not the signals to be output by the various sensors 20 are output when the engine 14 is stopped. Specifically, it is performed based on whether a vehicle speed sensor outputs a speed of 0, or a temperature sensor or a pressure sensor outputs an atmospheric temperature or an atmospheric pressure equivalent value.

  Next, in S28, it is determined whether or not the abnormality detection of the purge device 22 and the abnormality detection of the various sensors 20 have been completed.

  When the result in S28 is affirmative, the process proceeds to S30, and the abnormality detection execution unit 12g stores the abnormality detection result in the memory 12c. Next, in S32, the power supply to the abnormality detection execution unit 12g is cut off, the abnormality detection execution unit 12g is stopped, and the program is terminated.

  On the other hand, if the result in S24 is negative, the process proceeds to S34, where it is determined whether the engine 14 has been started based on the ignition signal. If the result is positive, the engine 14 is likely to be in a stopped state. Since the engine 14 has been started before reaching, the process proceeds to S36, the timer 12h2 is reset, and the program is terminated (that is, abnormality detection is not executed). If the result in S34 is negative, the process returns to S24.

  If the result in S28 is negative, the program proceeds to S38, in which it is determined whether the engine 14 has been started based on the ignition signal. When the result in S38 is affirmative, the process proceeds to S40, and abnormality detection by the abnormality detection execution unit 12g is stopped. If the result in S38 is negative, the program returns to S28.

  Note that the abnormality detection is performed when the driver's vehicle usage pattern is learned and the engine 14 is in a time zone where there is a high possibility that the engine 14 is in a stopped state. It is extremely rare.

  As described above, in this embodiment, the abnormality detection execution means (ECU 12, abnormality) that is mounted on the vehicle (V) and detects abnormality of the devices (purge device 22, various sensors 20) mounted on the vehicle. In the vehicle abnormality detection device (10) provided with a detection execution unit 12g), the abnormality detection execution means is activated when the engine (14) mounted on the vehicle is stopped to execute the abnormality detection. Engine start detection means (ECU12, power supply unit 12h, S108) for detecting start of the engine, engine stop detection means (ECU12, power supply unit 12h, S102) for detecting stop of the engine, Engine start time storage means (ECU 12, memory 12) for sequentially storing the start times of the engine each time start is detected , Power supply unit 12h, S110), engine stop time storage means (ECU 12, memory 12c, power supply unit 12h, S104) for sequentially storing the engine stop time each time the engine stop is detected, Engine stop time zone calculating means (ECU12, power supply unit 12h, S106, S112, S114) for calculating a time zone in which the engine is likely to be stopped based on the stored start time and stop time; When engine stop is detected, it is determined that the vehicle is in the calculated time zone, and time zone determination means (ECU 12, power supply unit 12h, S24) for determining whether or not the vehicle is in the calculated time zone. An abnormality detection executing means starting means (ECU 12, power supply unit 12h, S26) for starting the abnormality detection executing means. Configuration was.

  That is, when the driver's vehicle usage pattern is learned, the time zone in which the engine 14 is highly likely to be stopped is calculated from the learned vehicle usage pattern, and the stop of the engine 14 is detected, the time zone is in that time zone. Since the abnormality detection is performed only for a limited time, the abnormality detection can be reliably executed when the engine 14 is stopped. As a result, the abnormality detection execution means is not activated unnecessarily when the engine 14 is stopped, and the battery 24 is not consumed.

  Further, vehicle position detection means (navigation system 18) for detecting the position of the vehicle, and engine start time vehicle position storage means (ECU12) for sequentially storing the position of the vehicle at the time of engine start every time the engine start is detected. , A memory 12c, a power supply unit 12h, S110), and an engine stop vehicle position storage means (ECU12, memory 12c, power supply unit) that sequentially stores the position of the vehicle when the engine is stopped each time the engine stop is detected. 12h, S104), and the engine stop time zone calculating means stops the engine based on the stored start time, stop time, vehicle position when the engine is started, and vehicle position when the engine is stopped. Calculate the time zone and the stop position (location) that are likely to be in the state (S106, S112, S114) When the abnormality detection execution means activation means detects that the engine is stopped, it is determined that the detected position of the vehicle is the stop position and is in the calculated time zone. The abnormality detection execution means is activated (S16, S24, S26).

  In other words, it learns where the engine 14 is likely to be stopped and learns where to stop the vehicle. When a stop of the engine 14 is detected, abnormality detection is performed only when the vehicle is in that location and in that time zone. Since it comprised so, abnormality detection in the stop state of the engine 14 can be performed more reliably.

  In addition, when the engine stop is detected, the abnormality detection execution means starting means calculates a time from the engine stop time to the calculated time zone (S18), and the calculated time has elapsed. In this case, it is determined that the calculated time zone is in effect, and the abnormality detection execution means is activated (S20, S24, S26).

  Thereby, although it is a simple structure, the abnormality detection in the stop state of the engine 14 can be performed reliably.

  In the above description, the battery power is always supplied to the power supply unit 12h of the ECU 12. However, when the timer value becomes zero in S24, it is set to start itself, and power is supplied in the same manner as the main control unit. May be interrupted to temporarily stop the operation.

10: Abnormality detection device, 12: ECU, 12a: CPU, 12b: ROM, 12c: Memory, 12d: Engine control unit, 12e: Transmission control unit, 12f: Navigation system control unit, 12g: Abnormality detection execution unit, 12h: Power supply unit, 12h1: switch circuit, 12h2: timer, 14: engine, 16: transmission, 18: navigation system, 20: various sensors, 22: purge device, 24: battery, 26: ignition switch, V: vehicle

Claims (3)

  An abnormality detection executing means mounted on a vehicle and executing an abnormality detection of equipment mounted on the vehicle is provided, and the abnormality detection executing means is activated in a stopped state of an engine mounted on the vehicle to detect the abnormality. In the vehicle abnormality detection device to be executed, an engine start detection means for detecting the start of the engine, an engine stop detection means for detecting the stop of the engine, and the engine each time the start of the engine is detected. Engine start time storage means for sequentially storing the start time of the engine, engine stop time storage means for sequentially storing the engine stop time each time the engine stop is detected, and the stored start time and stop time. An engine stop time zone calculating means for calculating a time zone where the engine is likely to be in a stopped state, and When it is determined that the vehicle is in the calculated time zone, and when it is determined that the vehicle is in the calculated time zone, the abnormality detection executing means is activated. An abnormality detection device for a vehicle, comprising: an abnormality detection executing means starting means.   Vehicle position detection means for detecting the position of the vehicle, engine position vehicle position storage means for sequentially storing the position of the vehicle when the engine is started each time the start of the engine is detected, and stop of the engine are detected An engine stop time vehicle position storage means for sequentially storing the position of the vehicle at the time of engine stop, and the engine stop time zone calculation means includes the stored start time, stop time, and the vehicle start time at the time of engine start. Based on the position and the position of the vehicle when the engine is stopped, a time zone and a stop position where the engine is likely to be stopped are calculated, and the abnormality detection execution means activation means detects that the engine has stopped. When the detected vehicle position is determined to be the stop position and determined to be in the calculated time zone, the abnormality detection Abnormality detection device for a vehicle according to claim 1, wherein the starting means.   When the engine stop is detected, the abnormality detection execution means starting means calculates a time from the engine stop time to the calculated time zone, and when the calculated time has elapsed, the calculation 3. The vehicle abnormality detection device according to claim 1, wherein the abnormality detection execution unit is activated by determining that the vehicle is in the set time zone.

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