JP2007145235A - Control device for vehicle or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for a vehicle or the like which determines existence of abnormality of a time measurement means, accurately performs setting of a time in the case of abnormality, and prevents erroneous action caused by use of an erroneous passing time or the like. <P>SOLUTION: The control device for the vehicle is provided with: a time measurement means 6 acting by electric power always fed from a first power source circuit 21; a time setting treatment means acted by electric power fed from a second power source circuit 22 connected/disconnected in interlocking with a system starting switch 2; and a control means for performing control of the vehicle or the like using a time determined by the time setting treatment means. The time setting treatment means is provided with: a reading means 36 for reading time information from the time measurement means 6 with a predetermined time interval; an abnormality determination means for determining existence of abnormality of the time measurement means 6; and a time re-setting means for re-setting a predetermined initial time on the time measurement means 6 when it is determined that abnormality exists on the time measurement means by the abnormality determination means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a control device for a vehicle or the like equipped with an engine (internal combustion engine) or a fuel cell, and more particularly to a timepiece such as a clock IC capable of continuously measuring time without depending on on / off operation of a system start switch. The present invention relates to a control device for a vehicle or the like provided with means.

  The vehicle control device is equipped with a control means (ECM) whose main component is a microcomputer (microcomputer). In addition to the microcomputer built-in timer, the ECM can keep time independent of the on / off operation of the system start switch. It is known to provide time measuring means such as a clock IC that can measure time, and to determine the elapsed time based on the time measured by the time measuring means. In such a control device, an abnormality of the time measuring means such as the timepiece IC is detected by consistency with the time measured by the microcomputer built-in timer.

  As a technique related to time measurement in such a vehicle control device, conventionally, for example, as can be seen in Patent Document 1 below, the time until the system start switch is turned on (system stop time) is turned on. It is known to perform a fault diagnosis of a water temperature sensor by measuring and comparing the elapsed time after the system (engine) is stopped and the degree of decrease in the detected water temperature.

  In addition to the vehicle equipped with the engine (internal combustion engine), the elapsed time after the system stop is affected by the condensed water generated during the system stop even in the vehicle equipped with the fuel cell as shown in Patent Document 2 below, for example. It is known that it is used for air amount control at the time of start-up considering the above.

Japanese Patent Laid-Open No. 2002-14702 Japanese Patent Laid-Open No. 2004-22460

  In the vehicle control apparatus as described above, the following problems may occur with respect to time measurement.

  That is, when the time measurement start point (initial time) is not set normally during system operation, the time measured by the time measuring means such as the clock IC is read after the predetermined time has elapsed, and the microcomputer built-in timer is used. Do not notice any abnormalities until compared with the measured time. In the meantime, if the power supplied to the microcomputer is cut off in conjunction with the system start switch (system stop), the abnormality cannot be detected, and the starting point required at the time of restart (system and engine stop) The elapsed time from (time) may be incorrect.

In addition, when a predetermined time is set in advance at an unintended timing on the microcomputer side due to an abnormality of the clock IC or the like, the starting point is incorrect and the elapsed time from the intended starting point cannot be measured.
Further, when the clock IC or the like breaks down while the system is stopped, the power supply to the microcomputer is cut off (power is cut off), so that the elapsed time from the system stop point (starting point) cannot be measured.

  The present invention has been made to solve the problems as described above, the purpose of which is to determine the presence or absence of abnormality of the time measuring means, and when there is an abnormality, it is possible to correctly set the time, Therefore, it is possible to prevent erroneous operation due to using the wrong elapsed time, etc. so that the elapsed time from the starting point (system or engine stop time, etc.) required at the time of restarting, etc. is not mistaken. Another object is to provide a control device for a vehicle or the like.

  In order to achieve the above object, one of the control devices for a vehicle or the like according to the present invention basically operates in conjunction with a clock means that operates with electric power constantly supplied from the first power supply circuit and a system start switch. Time setting processing means operating with power supplied from the second power supply circuit connected and disconnected, and control means for controlling the vehicle or the like using the time determined by the time setting processing means. To do.

  The time setting processing means includes reading means for reading time information from the time measuring means at a predetermined time interval, and time information read by the reading means immediately after the system start switch is turned on. Based on the abnormality determining means for determining the presence or absence of abnormality of the time measuring means, and when the abnormality determining means determines that the time measuring means is abnormal, the time for resetting a predetermined initial time to the time measuring means And a resetting means.

  In this way, immediately after the system start switch is turned on from off, it is determined whether or not there is an abnormality in the timing means, and if there is an abnormality, the correct time is reset (written), The elapsed time from the starting point (system or engine stop time, etc.) required at the time of restart or the like can be prevented from being erroneous, and malfunction caused by using the incorrect elapsed time or the like can be prevented.

  In a preferred aspect, there is provided confirmation determining means for confirming whether or not the initial time resetting for the time measuring means by the time resetting means has been performed correctly.

  In another preferred aspect, there is provided means for storing the initial time resetting when the initial resetting of the timing means is performed by the time resetting means due to an abnormality of the timing means.

  In another preferred aspect, when the confirmation determining unit determines that the initial time resetting for the timing unit has not been performed correctly, the time resetting unit resets a predetermined initial time to the timing unit. And means for erasing the stored initial time reset caused by an abnormality of the time measuring means.

  In still another preferred aspect, the abnormality determining means determines whether or not there is an abnormality in the time measuring means with respect to a time change from the time read first after the system start switch is turned on to the time read next. This is done by determining whether or not the amount has decreased.

  According to the above preferred mode, it is possible to more reliably and accurately perform the determination of the presence or absence of abnormality of the timing means, the resetting of the initial time, the measurement of the elapsed time, and the like.

  The other one of the control devices for the vehicle or the like according to the present invention is basically connected / disconnected in conjunction with the time starting means operating with the electric power constantly supplied from the first power supply circuit and the system start switch. Time setting processing means operating with electric power supplied from the second power supply circuit, and control means for controlling the vehicle or the like using the time determined by the time setting processing means.

  The time setting processing means is read this time from a reading means for reading time information from the time measuring means at a predetermined time interval, a reading time interval of the reading means and a time read by the reading means last time. An abnormality determining means for determining presence or absence of abnormality of the time measuring means based on a time change amount up to time or time information from a device having time information such as a car navigation device, and the time measuring means by the abnormality determining means And storage means for storing the abnormality determination processing when it is determined that there is an abnormality.

  In a preferred aspect, the time setting processing means updates the control time when the abnormality determining means determines that the time measuring means is not abnormal, and when it is determined that there is an abnormality, The means includes time update means for setting a time based on time information from the car navigation device or a predetermined initial time.

  In this way, it is possible to determine whether there is an abnormality in the timekeeping means, and to correct (write) to the correct time when there is an abnormality, so that the elapsed time etc. can be prevented from being incorrect, and the incorrect elapsed time etc. is used. Can prevent malfunctions.

In the above aspect, the time setting processing unit preferably continues to operate without depending on the on / off operation of the system start switch until the power supplied in conjunction with the system start switch is cut off. To be done.
This prevents malfunction when the system start switch is turned on again before the supply power is cut off.

In this case, preferably, an upper limit is set for the time setting and the time reading duration for the time measuring means or the number of executions thereof.
Thereby, supply electric power is not interrupted forever and it can prevent that a vehicle-mounted battery is agar (electric storage amount becomes 0).

In a preferred embodiment, a substantial reading cycle by the reading unit is set to be shorter than a time update cycle of the time measuring unit and longer than ½ of the update cycle.
Thereby, it is possible to achieve both the detection delay of time update and the calculation load due to time reading.

In this case, in a preferred aspect, the abnormality determining means determines whether or not there is an abnormality in the time measuring means with respect to a time change from the time read first after the system start switch is turned on to the time read next. The determination is made by determining whether or not the amount is within the time update period of the time measuring means.
As a result, it is possible to more reliably and accurately determine whether there is an abnormality in the time measuring means.

In another preferred aspect, serial communication is used for reading the time from the time measuring means by the reading means, and a clock signal for receiving data of the next communication unit is output at the end of data extraction of one byte of communication unit. To be done.
Thereby, an overrun error due to a delay in reception processing can be prevented.

In another preferred embodiment, the time setting processing means includes means for interrupting power supply to the time measuring means and initializing the time measuring means, and whether or not the initialization could be executed in the test mode. In order to confirm this, the history of the power supply interruption in the time measuring means is not erased.
Thereby, the intermittent execution of electric power can be confirmed.

In another preferred aspect, the time set by the time resetting means or the time updating means and the upper limit of the time read by the reading means are set in a range not using leap years.
As a result, it is not necessary to perform calculations that take into account leap years, and the calculation load is reduced.

  On the other hand, the control device according to the present invention can be applied to both an engine (internal combustion engine) -equipped vehicle and a fuel cell-equipped vehicle, and the control means is obtained by the time setting processing means. In the case of a vehicle equipped with an engine, the elapsed time from turning off to on is preferably used to perform diagnosis of a water temperature sensor, calculation of the fuel injection amount, etc., and in the case of a vehicle equipped with a fuel cell, Preferably, the time and amount for increasing the supply pressure of air and hydrogen supplied to the fuel cell are calculated.

  According to the present invention, it is possible to determine whether or not there is an abnormality in the timing means, and in the case where there is an abnormality, the time can be set correctly. Therefore, the starting point required at the time of restart or the like (system or engine stop time, etc.) ) And the like since the elapsed time is not mistaken, and as a result, the malfunction caused by using the wrong elapsed time or the like can be prevented.

  Embodiments of a control device for a vehicle or the like of the present invention will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 is a schematic configuration diagram showing a first embodiment of a control device for a vehicle or the like according to the present invention.
The vehicle control apparatus 50 according to the present embodiment performs various controls including engine control in a vehicle equipped with an engine (internal combustion engine), and includes an ECM 1 incorporating a microcomputer 5 as a main component. . The ECM 1 is supplied with the voltage BATT (12 V) directly and constantly from the in-vehicle battery, and is also supplied with the voltage VB via the power relay 3 that is linked to the system start switch (IGN) 2. In the ECM 1, the voltage BATT and the voltage VB are converted to about 5 V by the transformer 4 and supplied to each element in the ECM 1 such as the microcomputer 5 and the clock IC 6. Here, the voltage BATT (power) supply system is the first power supply circuit 21, and the voltage VB (power) supply system is the second power supply circuit 22.

  The microcomputer 5 is well known per se and includes a CPU, a ROM, a RAM, an IO, and the like.

  In the following, the ECM 1 obtains the elapsed time until the system start switch 2 is turned on based on the time measured by the clock IC, and the elapsed time is immediately after the system start switch 2 is turned on. A case where the diagnosis of the water temperature sensor 8 is performed will be described as an example.

  As shown in the functional block diagram of FIG. 1, the microcomputer 5 of the ECM 1 includes an input process 30, an output process 40, an air system control process 31, an injection system control process 32, an ignition system control process 33, and a CAN communication process. 34, a timer communication process 36, a timer initialization process 37, a water temperature sensor diagnosis process 38, a time / time setting process 39, and the like (described later).

  In the microcomputer 5, even when the system start switch 2 is turned off, the power supply by the first power supply circuit 21 is continuously performed, whereby information before the system start switch 2 is turned off is stored in the RAM. The information stored in the RAM is not lost.

  The timepiece IC 6 continues to count time regardless of whether the system start switch 2 is turned on or off by power supply from the first power supply circuit 21. The clock IC 6 outputs the time measured as data (time data) of year, month, day, hour, minute, and second by serial communication at the request of the microcomputer 5. The data output from the clock IC 6 includes abnormality information such as IC oscillation stoppage. In the event of an abnormality, the microcomputer 5 temporarily shuts off the FET 7 on the power supply line to the clock IC 6 and turns off the clock IC 6. initialize.

  On the other hand, the detection signal obtained from the water temperature sensor 8 for detecting the cooling water temperature of the engine passes through the analog signal processing circuit 9 and is converted into a digital value by the AD conversion circuit inside the microcomputer 5. In addition, the ECM 1 takes in various sensor signals such as the accelerator opening, the throttle opening, the engine speed, and the intake air amount, and gives a command to the drive circuit 10 such as an FET so that the air amount, the fuel injection amount, and the ignition timing. Etc. are optimally controlled.

  The cooling water temperature of the engine detected by the water temperature sensor 8 is used for control of increase / decrease of the fuel injection amount, and the abnormality of the water temperature sensor 8 is the elapsed time from the time when the system start switch 2 is turned off and the detected water temperature. Diagnose in relation to When an abnormality is diagnosed, the result is stored in an EEPROM (not shown) in the ECM 1, and the information is notified to an external diagnostic device or the like via the CAN communication line 11.

  A car navigation device 12 is also connected to the CAN communication line 11. The ECM 1 (microcomputer 5) receives time information possessed by the car navigation device 12 and stores the time measurement start time (time) of the timepiece IC 6 to obtain time information obtained from the car navigation device 12 when the timepiece IC 6 is abnormal. Is used to correct the time of the clock IC6.

  It should be noted that the diagnosis of the water temperature sensor 8 performed immediately after the system start switch 2 is turned on requires time information measured by the timepiece IC 6 because the activation of the car navigation device 12 (reading of time information) is not in time.

  Hereinafter, an example of a program (processing procedure) related to the measurement of the elapsed time from when the system start switch 2 is turned on to when it is turned on and the diagnosis of the water temperature sensor 8 based on the elapsed time, which is executed by the microcomputer 5 will be described. This will be described with reference to the flowcharts of FIGS.

  FIG. 2 is a flowchart showing an example of a program that is executed when the system start switch 2 is turned on.

  Here, first, in step 100, the power supply relay 3 is turned on so that the power supply from the second power supply circuit 22 can be secured until the necessary processing is completed even after the system start switch 2 is turned off (self power supply ON). .

  In the subsequent step 101, the time reading process number # 4 shown in FIG. 3 and the time updating process # 5 are performed. That is, in the time reading process of # 4, as described above, the year, month, day, hour, minute, and second data are read from the clock IC 6 by serial communication. Serial communication outputs a clock signal (command) for receiving data of the next communication unit every time data extraction of one byte of communication unit is completed, and an overrun error due to a delay in reception processing (a situation where processing is not in time) To prevent. [Note that the processing of step 101 corresponds to claim 12. ]

The read time is converted into seconds and used for the time update process of # 5. The initial time set in step 142 of FIG. 7 (initial time writing process) to be described later is, for example, January 1, 2001 (00:00:00 am) (different from the actual date and time). If it is possible to measure the time for three years, it is sufficient for control, so the year 2004 and later is treated as December 31, 2003. In this range, leap years are not included, so only the calculation for the normal year is required, the required memory amount can be reduced, the processing time can be shortened, and the CPU load can be reduced. [This processing corresponds to claim 14. ]
In the time update process of process number # 5, the time is updated according to the procedure shown in FIG. 4 (described later).

In step 102 of FIG. 2, the water temperature sensor is diagnosed by the procedure shown in FIG. 5 (described later).
In step 103 of FIG. 2, it is determined whether or not the system start switch 2 is turned off. If it is determined that the system start switch 2 is not turned off, this determination is repeated (infinite loop until turned off). In the meantime, a scheduled process is executed every 10 milliseconds according to the procedure shown in FIG. 6 (described later). On the other hand, if it is determined that the signal has been turned off, the process proceeds to the next step 104 to execute a stop process.

  The stop process executed in step 104 of FIG. 2 is the completion of the write time confirmation process of FIG. 8 to be described later, or the duration or the number of executions of the write time confirmation process reaches a predetermined value (upper limit), and abnormality information The power supply relay 3 is turned off after a series of processing such as writing to the EEPROM in the ECM 1 is executed. [Note that the processing in step 104 corresponds to claims 8 and 9. ]

  In step 105 of FIG. 2, before the power supply voltage of the microcomputer 5 drops and the function is stopped, the system start switch 2 waits for the power supply voltage to drop while checking whether the system start switch 2 is turned on again. When turned on, the process returns to step 100.

Next, the time update process executed in step 101 of FIG. 2 will be described with reference to the flowchart shown in FIG.
FIG. 4 shows the first time update processing procedure immediately after the system start switch 2 is turned on. First, in step 110, it is determined whether there is an abnormality in the clock IC 6 from the received data. If it is determined, in step 111, the next processing number is set to # 0 (clock IC initialization). In step 112 which proceeds when it is determined that there is no abnormality (N) in the clock IC 6, it is determined whether or not the read times coincide with each other twice. If it is determined that they do not coincide with each other, step 113 is performed. The next processing number is set to # 4 (time reading), and the time reading processing is performed next time. In step 114 which proceeds when the read times coincide with each other twice, it is determined whether or not the time has decreased compared to immediately before the power supply relay 3 is turned off (from the read time interval and the last read time). The amount of change (time length) is compared), and if it is determined that it has decreased (Y), that is, if it is determined to be abnormal, the next processing number is set to # 1 (initial time writing) in step 115 Next time, the initial time is written. [Note that the processing of step 114 corresponds to claim 5. ]

  In step 116, the read time used for control is updated (# 5), and in the next step 117, the next process number is set to # 6 (waiting for 0.5 seconds), and the process proceeds to the waiting time process until the next read. . Since the processing of the clock IC 6 repeats the time reading (# 4) and the time updating (# 5) every 10 milliseconds, the substantial reading cycle is 540 milliseconds. The time (time) update cycle of the clock IC 6 is 1 second (1000 milliseconds), which is equal to or shorter than the update cycle and longer than ½ of the update cycle. [Note that the processing of step 116 corresponds to claim 10. ]

  FIG. 5 is a flowchart showing an example of a diagnostic program for the water temperature sensor 8 executed in step 102 of FIG. In this diagnostic program, first, in step 120, when the initial time is set (written) in the programs shown in FIG. 7 (# 1: initial time writing) and FIG. 8 (# 3: writing time confirmation), The longer the OFF time (elapsed time from OFF to ON) of the system start switch 2 is, the lower the diagnosis threshold for abnormality determination is. If the initial time has not been set (written), there is no system (engine) stop time (elapsed) Set the diagnosis threshold value to 0). [The processing of steps 120 to 122 corresponds to claims 1 to 3. ]

  In the following step 121, it is determined whether or not the detected temperature of the water temperature sensor 8 is within the diagnosis threshold range (between the lower limit value and the upper limit value) set in step 120. At 122, it is stored in the memory in ECM1.

  FIG. 6 is a flowchart showing a scheduled processing program that is executed every 10 milliseconds during the determination of transition to the stop processing executed in step 103 of FIG.

  In this program, in step 130, the system start switch 2, the water temperature sensor 8, and various sensor signals such as the accelerator opening, the throttle opening, the engine speed, and the intake air amount are captured. Based on the acquired information, in step 131, the throttle opening is adjusted to optimally control the intake air amount, in step 132, the fuel injection amount from the fuel injection valve, and in step 133, the ignition timing is optimally controlled.

  In subsequent step 134, the CAN communication line 11 receives information such as the shift position of the transmission and transmits information such as the vehicle speed to other units. A car navigation device 12 is also connected to the CAN communication line 11 and receives time information transmitted by the car navigation device 12.

In the next step 135, the time information time-measured by the clock IC 6 is read out, and the regular time processing is terminated.
The time information reading process is performed using process numbers # 0 to # 6 in FIG.

  In the process number # 0, the FET 7 in the power supply line is temporarily cut off to initialize the timepiece IC 6. In the test mode after assembling the ECM1, skip # 1 so that the history remaining in the clock IC6 set by the power supply cut-off does not disappear at the time setting so that it can be confirmed whether or not the power supply cut-off has been performed. Proceed to # 4. [This processing corresponds to claim 13. ]

  In process number # 1, the initial time is set (written) by the procedure shown in the flowchart of FIG. That is, in step 140, it is determined whether or not the initialization is due to the abnormality of the clock IC6. If it is determined that the initialization is due to the abnormality of the clock IC6 (Y), the time information received from the car navigation device 12 in step 141. If there is, reset using the time (write the navigation time correction value). On the other hand, if the time information cannot be received immediately after the system is started, a predetermined initial time is set, and the fact that the time cannot be set correctly is stored in the RAM. [Note that the processing of step 1141 corresponds to claim 3. ]

  If it is determined in step 140 that the initialization is not due to abnormality of the clock IC 6 (N), a predetermined initial time is written in step 142 as intentional initialization of the clock IC 6. In step 143, the next processing number is set to # 2 (time reading), the time reading is performed next time, and the writing time confirmation processing of FIG.

  Next, the write time confirmation process for process number # 3 shown in FIG. 8 will be described. In this program, first, in step 150, it is determined whether or not there is received data indicating an abnormality of the clock IC 6, and if it is determined that there is an abnormality (Y), the process proceeds to step 151 and the processing number # 0 described above. That is, the clock IC 6 is initialized.

  When it is determined in step 150 that there is no abnormality (N), the process proceeds to step 152, where it is determined whether or not the read times coincide with each other twice, and when it is determined that they do not coincide (N) In step 153, the next processing number is set to # 2 (time reading), and the next time reading is performed. Further, in step 154, which proceeds when it is determined in step 152 that the read time coincides twice consecutively (Y), it is determined whether or not the read time matches the time written in the process number # 1. If there is a discrepancy (N), the process proceeds to step 155 where the next processing number is set to # 1, and the fact that the setting has not been correctly performed is stored in the above-described RAM, and the initial of # 1 shown in FIG. Execute time writing again.

  If it is determined that the time read in step 154 coincides with the time written in the above-described process number # 1 (Y), the time used for control is updated (# 5) in the subsequent step 156 and the time shown in FIG. In the case of the initial time written in step 142, the memory that could not be set correctly in the RAM is deleted, and in step 157, the next process number is set to # 6, and the process proceeds to a waiting time process until the next reading. When the waiting time elapses, the process number is set to # 4 and the time reading process similar to step 101 of FIG. 2 described above is performed, and the process number is set to # 5 and the time update process shown in FIG. Execute time update processing. [Note that the processing in steps 150 to 157 corresponds to claims 1 to 4. ]

  FIG. 9 is a flowchart showing the time update process (timed process) for process number # 5. In this program, first, in step 160, it is determined whether or not the clock IC 6 is abnormal based on the received data. If it is determined that there is an abnormality (Y), the next processing number is set to # 0 in step 161. (Clock IC initialization). In step 162, which proceeds when it is determined that there is no abnormality (N) in step 160, it is determined whether or not the read times coincide with each other twice. If they do not coincide (N), the next time in step 163 The process number is set to # 4 (time reading), and the time reading is performed next time.

  In step 164, which proceeds when it is determined in step 162 that the read times coincide with each other twice (Y), it is determined whether or not the time change is within one second with respect to the current control time. Is determined to exceed 1 second (N), the next process number is set to # 1 in step 165, and the initial time writing process is performed next time. If it is determined in step 164 that the time change is within one second (Y), the readout time used for control is updated in step 166, and the next processing number is set to # 6 in the subsequent step 167 until the next readout. Shift to waiting time processing.

  The determination in step 164 in FIG. 9 is obtained from the navigation device 12 by storing the time information received from the navigation device 12 when setting the initial time predetermined in step 142 in FIG. The determination may be made using the elapsed time and the elapsed time obtained from the current control time. [Note that the processing of step 164 corresponds to claims 6, 7 and 11. ]

  In the vehicle control device 50 of the present embodiment configured as described above, the timepiece IC 6 that operates with the constantly supplied power and the time setting for the timepiece IC 6 that operates with the power supplied via the power supply relay 3. (Writing), reading of the time, and ECM1 for controlling the vehicle based on the elapsed time from turning off to turning on the system start switch 2 calculated based on the time. Until the correct time is written, the time is reset with respect to the clock IC 6 without turning off the power supply relay 3, so that the correct time can always be set with respect to the clock IC 6, and restarting is performed. To avoid mistakes in the elapsed time from the starting point (system or engine stop point, etc.) required at times, etc. Malfunction can be reliably prevented that.

Second Embodiment
In the first embodiment described above, in a vehicle equipped with an engine (internal combustion engine), the time measured by the timepiece IC 6, that is, the elapsed time until the system start switch is turned on, is used. (Setting of a diagnostic threshold value in step 120 in the water temperature sensor diagnostic program in FIG. 5), control of the fuel injection amount, and the like are performed, depending on the off time (elapsed time) of the system start switch 2 The point of performing the control at the time of restart can be similarly applied to the fuel cell vehicle described in Patent Document 2 described above. That is, in a vehicle equipped with a fuel cell, when the system start switch is restarted after being turned off, the off time (elapsed time) of the system start switch 2 is used to calculate the time and amount for increasing the supply pressure of air and hydrogen supplied to the fuel cell. ) Is necessary, and by using an accurate elapsed time, it is possible to perform control to optimally diffuse the air and hydrogen of the fuel cell electrode. It should be noted that the influence of the condensed water generated while the system (fuel cell) is stopped is required to be longer than the time during which the engine cooling water temperature falls to the ambient temperature, and to be able to count for a long time.

FIG. 10 is a schematic configuration diagram showing a second embodiment of the control device for a vehicle or the like according to the present invention.
The vehicle control device 60 according to the present embodiment performs various controls including fuel cell control in a vehicle equipped with a fuel cell. The main component of the vehicle control device 60 is the microcomputer 5 as in the first embodiment. A built-in ECM1 is provided. The ECM 1 is supplied with the voltage BATT (12 V) directly and constantly from the vehicle-mounted battery, and is also supplied with the voltage VB via the power relay 3 that is linked to the system start switch 2. In the ECM 1, the voltage BATT and the voltage VB are converted to about 5 V by the transformer 4 and supplied to each element in the ECM 1 such as the microcomputer 5 and the clock IC 6. Here, the voltage BATT (power) supply system is the first power supply circuit 21, and the voltage VB (power) supply system is the second power supply circuit 22.

  The ECM 1 of the vehicle control device 60 of the second embodiment is different from the ECM 1 used for engine control of the first embodiment in that the signal taken in via the analog signal processing circuit 9 is supplied to the fuel cell in addition to the accelerator opening. The difference is in the pressure and flow rate of air and hydrogen. Further, an object to be controlled by giving a command to the drive circuit 10 such as an FET is an air pressure or a hydrogen pressure.

  The processing executed by the microcomputer 5 is basically the same as that of the engine-equipped vehicle.

  Hereinafter, differences between the control device 50 for the engine-equipped vehicle and the control device 60 of the present embodiment will be described mainly.

  FIG. 11 is a flowchart corresponding to the engine-equipped vehicle shown in FIG. 2 described above. Steps 100, 101, and 103 to 105 are the same as those in FIG. In step 106, the air and hydrogen supplied after startup are calculated according to the procedure shown in FIG. That is, as shown in FIG. 12, in step 170, the initial time setting shown in FIGS. 7 and 8 can be confirmed, and it is determined whether or not the timekeeping time is valid, and it is determined that it is valid (Y). If so, the supply amounts of air and hydrogen are respectively calculated in step 171, and the set time for increasing the volume is calculated in step 172. If it is determined in step 170 that it is not valid (N), in step 173, provisional values are set for the supply amount and the set time.

  FIG. 13 is a flowchart showing a scheduled process executed every 10 milliseconds corresponding to FIG. 6 for engine control.

  In step 130 of FIG. 13, various sensor signals such as the system start switch 2, accelerator opening, air, hydrogen pressure, and flow rate are captured. Based on the acquired signal, in step 181, the air pressure supplied by adjusting the air regulating valve is controlled, and in step 182, the hydrogen pressure supplied by controlling the hydrogen pressure regulating valve is controlled.

  In subsequent step 134, information such as necessary power generation amount and information transmission such as power generation state to other units are performed by CAN communication 11. A navigation device 12 is also connected to the CAN communication 11 and receives time information from the navigation device 12.

  In the following step 135, time information reading processing of the clock IC 6 is performed, and the regular processing is ended.

  Also in the present embodiment, the presence or absence of abnormality of the clock IC 6 is determined, and if there is an abnormality, the time can be set correctly, so that the starting point required at the time of restarting (system or engine stop time, etc.) ) And the like, and as a result, malfunction caused by using the wrong elapsed time, etc., that is, the time to increase the supply pressure of air and hydrogen supplied to the fuel cell after startup and It is possible to prevent wasteful supply of air and hydrogen more than necessary because an error occurs in the amount or a desired power generation amount cannot be obtained.

1 is a schematic configuration diagram showing a first embodiment (for an engine-equipped vehicle) of a vehicle control device according to the present invention. The flowchart which shows an example of the program performed when a system start switch turns on. The correspondence chart which shows the contents of processing which a microcomputer performs, and its processing number (# 0- # 6). The flowchart which shows the first time update process procedure immediately after a system start switch turns on. The flowchart which shows an example of a water temperature sensor diagnostic program. The flowchart which shows an example of the regular processing program of engine control. The flowchart which shows an initial time write-in processing procedure. The flowchart which shows the write time confirmation processing procedure. The flowchart which shows a normal time update process sequence. The schematic block diagram which shows 2nd Embodiment (for vehicles with a fuel cell) of the control apparatus of the vehicle which concerns on this invention. The flowchart which shows an example of the program performed when a system start switch turns on. The flowchart which shows the starting fuel calculation procedure of fuel cell control. The flowchart which shows an example of the fixed time processing program of fuel cell control.

Explanation of symbols

1 ... ECM
2 ... System start switch 3 ... Power relay 4 ... Transformer 5 ... Microcomputer 6 ... Clock IC
7… FET
DESCRIPTION OF SYMBOLS 8 ... Water temperature sensor 9 ... Analog signal processing circuit 10 ... Drive circuit 11 such as FET ... CAN communication line 12 ... Car navigation device 21 ... First power supply circuit 22 ... Second power supply circuit

Claims (16)

Time measuring means that operates with electric power that is constantly supplied from the first power supply circuit, time setting processing means that operates with electric power supplied from the second power supply circuit that is connected to and disconnected from the system start switch, and Control means for controlling the vehicle and the like using the time determined by the time setting processing means, and a control device for the vehicle and the like,
The time setting processing means is based on reading means for reading time information from the time measuring means at predetermined time intervals, and time information read by the reading means immediately after the system start switch is turned on. , An abnormality determining means for determining whether or not there is an abnormality in the time measuring means, and resetting a predetermined initial time in the time measuring means when the abnormality determining means determines that the time measuring means is abnormal And a control device for a vehicle or the like.   2. The control device for a vehicle or the like according to claim 1, further comprising confirmation determining means for confirming whether or not the initial time resetting with respect to the timing means by the time resetting means has been performed correctly.   2. The apparatus according to claim 1, further comprising means for storing the initial time resetting when the initial resetting of the clocking means is performed by the time resetting means due to an abnormality of the clocking means. Or a control device for a vehicle or the like according to 2;   When it is determined by the confirmation determining means that the initial time resetting for the time measuring means has not been performed correctly, the time resetting means resets a predetermined initial time in the time measuring means, and the time measuring means is abnormal. 4. The control apparatus for a vehicle or the like according to claim 3, further comprising means for erasing the memory of resetting the initial time due to the factor.   The abnormality determining means determines whether or not there is an abnormality in the timing means, and whether or not the amount of time change from the time read first after the system start switch is turned on to the time read next is reduced. The control device for a vehicle or the like according to claim 1, wherein the control device is configured to discriminate between the two. Time measuring means that operates with electric power that is constantly supplied from the first power supply circuit, time setting processing means that operates with electric power supplied from the second power supply circuit that is connected to and disconnected from the system start switch, and Control means for controlling the vehicle and the like using the time determined by the time setting processing means, and a control device for the vehicle and the like,
The time setting processing means includes a reading means for reading time information from the time measuring means at a predetermined time interval, a reading time interval of the reading means and a time read from the previous time by the reading means to a time read this time. Abnormality determining means for determining the presence or absence of abnormality of the time measuring means on the basis of the amount of time change of the time or time information from a device having time information such as a car navigation device, and the abnormality determining means A control device for a vehicle or the like, characterized by comprising storage means for storing the abnormality determination processing when it is determined that the abnormality is present.   The time setting processing means updates the control time when the abnormality determination means determines that the timekeeping means is not abnormal, and when it is determined that there is an abnormality, The control device for a vehicle or the like according to claim 6, further comprising time updating means for setting a time based on time information from a car navigation device or a predetermined initial time.   The time setting processing means is configured to continue the operation without depending on the on / off operation of the system start switch until the power supplied in conjunction with the system start switch is cut off. The control device for a vehicle or the like according to claim 1 or 6.   9. The control device for a vehicle or the like according to claim 8, wherein an upper limit is set for a duration of time setting and time reading for the time measuring means or for the number of times of execution.   The substantial reading cycle by the reading unit is set to be shorter than the time update cycle of the time measuring unit and longer than ½ of the update cycle. Control devices for vehicles and the like.   The abnormality determining means determines whether or not there is an abnormality in the time measuring means. The time change amount from the time read first after the system start switch is turned on to the time read next is the time of the time measuring means. The control device for a vehicle or the like according to claim 10, wherein the control device is configured to determine whether or not it is within an update cycle.   Serial communication is used to read the time from the time measuring means by the reading means, and a clock signal for receiving data of the next communication unit is output every time data extraction of one byte of communication unit is completed. The control device for a vehicle or the like according to claim 1 or 6.   The time setting processing means has a means for initializing the time measuring means by cutting off power supply to the time measuring means, and in the test mode, to check whether or not the initialization has been performed, 7. The control apparatus for a vehicle or the like according to claim 1, wherein the history of power supply interruption in the means is not erased.   7. The vehicle according to claim 1, wherein the time set by the time resetting means or the time updating means and the upper limit of the time read by the reading means are set in a range not using leap years. Control device.   The vehicle is an engine-equipped vehicle, and the control means uses the elapsed time from the time when the system start switch is turned on to the time when the system start switch is turned on, which is obtained by the time setting processing means. 15. The control device for a vehicle or the like according to claim 1, wherein the injection amount is calculated.   The vehicle is a vehicle equipped with a fuel cell, and the control means supplies the fuel cell using an elapsed time required by the time setting processing means until the system start switch is turned on. The control device for a vehicle or the like according to any one of claims 1 to 14, wherein the time and amount for increasing the supply pressure of air and hydrogen are calculated.

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