JP2003286888A - Controller of vehicle for detecting abnormality of temperature sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the abnormality of a temperature sensor without being affected by a disturbance. <P>SOLUTION: A controller of a vehicle having a plurality of temperature detecting means for detecting temperatures of part-equipped regions calculates a deviation between two temperatures of a plurality of temperatures detected by the plurality of temperature detecting means to detect abnormalities in the plurality of temperature detecting means. In another embodiment, the average value of the plurality of temperatures detected by the plurality of temperature detecting means is calculated. The deviation between each of the temperature detected by the plurality of temperature detecting means and the average value is calculated. Based on the calculated deviation, the abnormalities of the plurality of temperature detecting means are detected. The calculation of the deviation is preferably performed when an internal combustion engine stops and then restarts and a prescribed time is decided to have elapsed from the stop. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle control device for detecting an abnormality in a temperature sensor in a vehicle having a plurality of temperature sensors.

[0002]

2. Description of the Related Art A vehicle is provided with a plurality of temperature sensors, and each temperature sensor detects the temperature of a predetermined portion of the vehicle. The detected temperature is used as a control parameter in controlling the internal combustion engine. When an abnormality occurs in the temperature sensor, an incorrect detection value from the temperature sensor makes it impossible to properly control the internal combustion engine, which may deteriorate the operating state of the internal combustion engine.

Japanese Patent Application Laid-Open No. 8-28337 discloses a diagnostic device for a temperature sensor. The vehicle is provided with a water temperature sensor that detects the water temperature of the internal combustion engine, an intake air temperature sensor that detects the intake air temperature, and a fuel temperature sensor that detects the temperature of the fuel. The diagnostic device has an abnormality in the fuel temperature sensor when the detected value of the fuel temperature sensor is higher than a predetermined upper limit value for a predetermined time or more even though the detected values of the water temperature sensor and the intake air temperature sensor are lower than the predetermined value. Is determined to have occurred. Further, when the detected value of the water temperature sensor and the intake air temperature sensor is higher than the predetermined value, but the detected value of the fuel temperature sensor is lower than the predetermined lower limit for a predetermined time or more, the fuel temperature sensor is abnormal. judge. Warning light (MIL) when the fuel temperature sensor is determined to be abnormal
Lights up.

[0004]

When the above-described conventional diagnosis method is performed, for example, at the time of starting the internal combustion engine or immediately after the starting, the following problems occur. That is, according to the conventional diagnosis method described above, the upper limit value and the lower limit value preset for the temperature sensor are used to determine whether or not an abnormality has occurred in the temperature sensor. On the other hand, if a sufficient time has passed from the stop of the internal combustion engine to the next start of the internal combustion engine, the detected values of the respective temperature sensors at the time of starting the internal combustion engine are set by the temperature sensor. Regardless of the location, the value is almost equal to the outside temperature. When the above-mentioned conventional diagnostic method is carried out in such a situation,
Since the upper limit value and the lower limit value for determining the abnormality are fixed, the abnormality determination of the temperature sensor may be erroneous when the outside air temperature is extremely high or low.

In order to avoid erroneous abnormality determination, the upper limit value is set higher in consideration of an extremely high outside temperature, and the lower limit value is lowered in consideration of an extremely low outside temperature. Must be set to. This means expanding the temperature range in which the temperature sensor is determined to be normal. If the temperature range determined to be normal is widened, there are many situations in which the temperature sensor is erroneously determined to be normal, although the temperature sensor is actually abnormal.

Therefore, there is a need for an apparatus and method for detecting abnormality of a temperature sensor without being affected by a disturbance such as the outside temperature.

[0007]

According to one aspect of the present invention, a vehicle control device having a plurality of temperature detecting means for detecting the temperature of a portion provided is provided with a plurality of temperature detecting means. A deviation calculating means (33) for calculating a deviation between two temperatures, and an abnormality detecting means (34) for detecting an abnormality in a plurality of temperature detecting means based on the deviation calculated by the deviation calculating means. , Is provided.

According to the present invention, since the temperature detected by the temperature detecting means is relatively compared to detect the abnormality of the temperature detecting means, the temperature detecting means can be operated without being affected by a disturbance such as an outside temperature. It is possible to determine whether or not an abnormality has occurred.

According to another aspect of the present invention, a vehicle control device having a plurality of temperature detecting means for detecting the temperature of a portion provided therein calculates an average value of a plurality of temperatures detected by the plurality of temperature detecting means. Mean value calculation means (41)
And a deviation calculating means (4) for calculating a deviation between the temperature detected by each of the plurality of temperature detecting means and the average value.
2) and an abnormality detecting means (43) for detecting an abnormality in each of the plurality of temperature detecting means based on the deviation calculated by the deviation calculating means.

According to the present invention, since the temperature detected by each of the temperature detecting means is compared with the average value to detect the abnormality of the temperature detecting means, the temperature of each of the temperature detecting means is detected without being affected by a disturbance such as an outside temperature. It is possible to detect an abnormality in the temperature detecting means.

According to another aspect of the present invention, the control device further determines, when the internal combustion engine of the vehicle is stopped and then started, whether or not a predetermined time has elapsed from the stop. (31) is provided. The control device implements the deviation calculating means when it is determined that the predetermined time has elapsed.

According to the present invention, since the abnormality detection is performed under the condition that the temperatures detected by the plurality of temperature detecting means are settled to the outside air temperature, the accuracy of the abnormality detection can be improved.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall system configuration diagram of an internal combustion engine (hereinafter referred to as “engine”) and its control device according to an embodiment of the present invention.

An electronic control unit (hereinafter referred to as "ECU") 5 includes an input circuit 5a for receiving data sent from various parts of the vehicle, a CPU 5b for executing calculations for controlling various parts of the vehicle, and a read-only device. Memory (RO
M) and random access memory for temporary storage (RA
M) having storage means 5c, and an output circuit 5d for sending a control signal to each part of the vehicle. The ROM of the memory 5c stores programs and various data for controlling various parts of the vehicle. A program for executing the control according to the present invention, and data and tables used when executing the program are stored in this ROM. The read-only memory may be a rewritable ROM such as an EEPROM. RAM has C
A work area for calculation by the PU 5a is provided, and data sent from each part of the vehicle and control signals sent to each part of the vehicle are temporarily stored.

The engine 1 is, for example, an engine having four cylinders, and an intake pipe 2 is connected thereto. A throttle valve 3 is provided upstream of the intake pipe 2. A throttle valve opening sensor (θTH) 4 is connected to the throttle valve 3 and sends a signal corresponding to the opening of the throttle valve 3 to the EC.
Send to U5.

The fuel injection valve 6 is provided in each cylinder of the engine and is connected to a fuel tank 8 via a fuel pump 7. The fuel injection valve 6 is opened by the ECU 5
It is controlled by the signal sent from.

An intake pipe pressure (PBA) sensor 10 is provided downstream of the throttle valve 3 via a pipe 9. P
The BA sensor 10 detects the pressure in the intake pipe 2 and sends it to the ECU 5. An outside air temperature (TAOB) sensor 16 is provided upstream of the intake pipe pressure sensor 10. TAO
The B sensor 16 detects the temperature upstream of the intake pipe 2 and sends it to the ECU 5. The temperature detected by the TAOB sensor 16 indicates almost the outside air temperature. An intake air temperature (TA) sensor 11 is provided downstream of the intake pipe pressure sensor 10. The TA sensor 11 detects the temperature of the air taken into the engine 1 via the intake pipe 2 and sends it to the ECU 5.

The engine water temperature (TW) sensor 12 is attached to the cylinder block of the engine 1. TW
The sensor 12 detects the water temperature of the engine 1 and outputs it as EC.
Send to U5. The engine speed (NE) sensor 13 and the cylinder discrimination (CYL) sensor 14 are attached to the cam shaft or crank shaft of the engine 1. NE sensor 1
3 generates a signal pulse (TDC signal pulse) at a predetermined crank angle position and sends it to the ECU 5. The CYL sensor 14 generates a signal pulse at a predetermined crank angle position of a specific cylinder and sends it to the ECU 5.

An exhaust pipe 17 is connected downstream of the engine 1. The engine 1 exhausts gas through a three-way catalyst 15 which is an exhaust gas purifying device provided in the middle of the exhaust pipe 14. The O2 sensor 18 detects the oxygen concentration in the exhaust gas,
It is sent to the ECU 5. Catalyst temperature (TCAT) sensor 1
9 detects the temperature of the three-way catalyst 15 and sends it to the ECU 5.

The upper portion of the sealed fuel tank 8 has a two-way valve 20, a canister 21, and a purge control valve 22.
Is connected to the intake pipe 2 via. Purge control valve 22
The opening and closing of the is controlled by the ECU 5. Fuel tank 8
When the vaporized gas generated inside reaches a predetermined pressure,
The positive pressure valve of the 2-way valve 20 is pushed open to flow into the canister 21, and is absorbed and stored in activated carbon. ECU5
When the purge control valve 22 is opened according to the signal from the intake pipe, the evaporative gas stored in the canister is sucked from the outside air intake port provided in the canister 21 due to the negative pressure of the intake pipe and the intake pipe. 2 is sucked.

When the fuel tank 8 is cooled due to the influence of the outside air and the pressure inside the fuel tank becomes low, the negative pressure valve of the 2-way valve is opened and the vaporized gas stored in the canister 21 is returned to the tank 8. In this way, the evaporative fuel generated in the fuel tank 8 is suppressed from being released to the atmosphere.

A fuel temperature (TF) sensor 23 that detects the temperature of the fuel and sends it to the ECU 5 is provided in the fuel in the fuel tank 8. In addition, a tank temperature (TTANK) sensor 24 that measures the temperature of the air in the fuel tank 8
Are provided in the fuel tank 8.

The signal sent to the ECU 5 is passed to the input circuit 5a. The input circuit 5a converts the input analog signal into a digital signal. The CPU 5b uses the converted digital signal to execute a calculation in accordance with a program stored in the storage means 5c to generate a control signal to be sent to each actuator of the vehicle. The output circuit 5d is
These control signals are sent to a predetermined actuator.

FIG. 2 shows a first embodiment of the present invention,
It is a functional block diagram of a vehicle control device which detects abnormality of a temperature sensor. The vehicle control device detects an abnormality in the plurality of temperature sensors based on the detection values from the plurality of temperature sensors. Abnormalities include, for example, sticking in which a detected value is fixed to a predetermined value, and an inclination deviation in which the proportional relationship between the actual temperature and the detected value by the temperature sensor is not normal.

As shown in FIG. 1, the temperature sensor includes an intake air temperature (TA) sensor 11 and an outside air temperature (TAOB) sensor 1.
6, engine water temperature (TW) sensor 12, catalyst temperature (TC
Any of an AT) sensor 19, a fuel temperature (TF) sensor 23, and a fuel tank temperature (TTANK) sensor 24 may be included. The abnormality detection of the temperature sensor according to the present invention can be applied to other temperature sensors.

The elapsed time determination unit 31 determines whether or not a predetermined time has elapsed since the engine was stopped in the previous operation cycle. The predetermined time is set to a sufficient time (for example, 8 hours) so that the engine is sufficiently left and each of the temperature sensors provided in the vehicle has a substantially same value (that is, a value substantially corresponding to the outside temperature). To be done.

When the elapsed time determining unit 31 determines that the predetermined time has elapsed, the detected value acquisition unit 32 acquires the detected value from each temperature sensor. The deviation calculator 33 calculates the deviation between the detection values of two temperature sensors among the detection values of the plurality of temperature sensors.

For example, when the detected values of the two temperature sensors are T1 and T2, respectively, the calculated deviation is
| T1-T2 |. When the detected values of the three temperature sensors are T1, T2, and T3, respectively, the calculated deviations are | T1-T2 |, | T1-T3 |, and | T2.
-T3 |. In the case of n temperature sensors, [(n-
1) + (n−2) +, ..., + 1] deviations are calculated.

If both of the two given temperature sensors are normal, the deviation between the detected values of the two temperature sensors should be small when the above-mentioned predetermined time has elapsed. Therefore, if the deviation between the detection values of the two given temperature sensors is larger than a predetermined value (for example, 20 ° C.), the abnormality detection unit 34 determines that one of the two temperature sensors has an abnormality. .

The warning section 35 is provided by the abnormality detection section 34.
If an abnormality is detected in the temperature sensor, the MIL (warning light) is turned on.

FIG. 4 shows a second embodiment of the present invention.
It is a functional block diagram of a vehicle control device which detects abnormality of a temperature sensor. Only the points different from the first embodiment will be described.

The average value calculation unit 41 calculates an average value of a plurality of detection values detected by the plurality of temperature sensors. The deviation calculation unit 42 calculates, for each temperature sensor, the deviation between the detection value of the temperature sensor and the average value calculated by the average value calculation unit 41.

As described above, if the given temperature sensor is normal, the deviation between the detected value of the temperature sensor and the average value of the detected values of the plurality of temperature sensors should be small when the above-mentioned predetermined time has elapsed. Is. Therefore, the abnormality detection unit 43
If the deviation between the detection value and the average value of a given temperature sensor is larger than a predetermined value (for example, 20 ° C.), it is determined that the temperature sensor has an abnormality. In this way, the abnormality in each temperature sensor is detected.

As described above, the abnormality detection in the first and second embodiments is preferably carried out when it is determined that the predetermined time has elapsed since the engine was stopped in the previous driving cycle. . Since the abnormality detection is performed under the situation where the respective temperature sensors have been settled down to the outside air temperature, the accuracy of the abnormality detection can be improved.

FIG. 4 is a flow chart of a process for detecting an abnormality of the temperature sensor according to the first embodiment shown in FIG. The example shown in FIG. 4 shows a case where there are two temperature sensors (referred to as first and second temperature sensors).

When the engine is started in the current driving cycle, the process goes to step S101. In step S101, it is determined whether the start mode is set.
For example, if the engine speed NE is less than a predetermined speed (for example, 500 rpm), the start mode is determined. If it is determined to be the starting mode, step S102.
Proceed to.

In step S102, the elapsed time TE
NGOFF is compared with a predetermined value TENGOFFJUD. The elapsed time TENGOFF indicates the elapsed time since the engine was stopped in the previous driving cycle. If the elapsed time TENGOFF is less than or equal to the predetermined value TENGOFFJUD, the engine has not been left for a sufficient time and the first
The detection values of the second temperature sensor and the second temperature sensor may not converge to the outside air temperature. Under these circumstances,
It may not be possible to accurately detect an abnormality in the temperature sensor. Therefore, in step S103, the flag F_TEMPGO is set to zero in order to prohibit the abnormality detection process.

On the other hand, the elapsed time TENGOFF is the predetermined value T
If it is larger than ENGOFFJUD, the engine is in a sufficiently left state. In step S104, the permission flag F_T is set in order to permit the temperature sensor abnormality detection process.
Set 1 to EMPGO.

If the start mode has ended when the process enters this routine again, step S105.
Proceed to. In step S105, the elapsed time TENG
Reset OFF to zero. In step S106, the value of the permission flag F_TEMPGO is checked. If the value of the permission flag F_TEMPGO is zero, this routine is exited. If the value of the permission flag F_TEMPGO is 1, the process proceeds to step S107.

In step S107, the detection values T1 and T2 of the first and second temperature sensors are acquired. In step S108, the deviation | T1-T2 | between the detected values T1 and T2 is compared with a predetermined value DTJUD. If the deviation is larger than the predetermined value DTJUD, step S109.
To indicate that one of the first and second temperature sensors has an abnormality, the flag F_FSTEMM is displayed.
Set P to the value 1.

Deviation between detected values T1 and T2 | T1-T2
If | is equal to or smaller than the predetermined value DTJUD, the process proceeds to step S110, and the flag F_OKTEMP is set to the value 1 to indicate that the detected values T1 and T2 are normal.

In step S111, the flag F_TE is set.
Reset MPGO to zero. As described above, the abnormality detection process of the temperature sensor is performed once in a given operation cycle, for example, when the engine is started. Alternatively, the abnormality detection process may be performed at the time of engine start instead of
It may be immediately after the engine is started in which the output of each temperature sensor has not changed from the outside air temperature.

Thus, the abnormality in the two temperature sensors is detected based on the deviation between the detected values of the two temperature sensors. Since the abnormality of the temperature sensor can be detected without being affected by the disturbance such as the outside air temperature, more accurate abnormality detection can be performed.

FIG. 5 is a flow chart of a process for detecting an abnormality of the temperature sensor according to the first embodiment shown in FIG. The example shown in FIG. 5 shows a case where there are three temperature sensors (referred to as first to third temperature sensors).

Since the process in steps S121 to S126 is the same as the process in steps S101 to S106 shown in FIG. 4, description thereof will be omitted. In step S127, the detection values T1, T2, and T3 of the first to third temperature sensors are acquired. In step S128, the deviation DT1 between the detection values T1 and T2, the detection value T
The deviation DT2 between 1 and T3 and the deviation DT3 between the detected values T2 and T3 are obtained.

In steps S129, 130 and 131, each deviation is compared with a predetermined value DTJUD (for example, 20 ° C.). In step S129,
If the deviation DT1 is larger than the predetermined value DTJUD, it indicates that one of the first and second temperature sensors is abnormal. In step S130, the deviation DT2 is the predetermined value D
If it is larger than TJUD, it means that one of the first and third temperature sensors is abnormal. Step S131
If the deviation DT3 is larger than the predetermined value DTJUD, it means that one of the second and third temperature sensors is abnormal.

If all the determination steps of steps S129 to 131 are Yes, the value 1 is set in the flag F_FSDTEMP in step S145. This indicates that at least one abnormal temperature sensor is included in the first to third temperature sensors. It is not specified which temperature sensor is abnormal.

Steps S129, S133 and S13
4, if all of the deviations DT1 to DT3 are less than or equal to the predetermined value DTJUD, the process proceeds to step S146,
The value 1 is set in the flag F_OKTEM to indicate that all of the first to third temperature sensors are normal.

When the determinations in steps S129 and S130 are Yes and the determination in step S131 is No, the deviations DT1 and DT2 are larger than the predetermined value DTJUD, and the deviation DT3 is less than the predetermined value DTJUD. Step S1
Proceeding to 47, this indicates that the first temperature sensor is abnormal, so the flag F_FSDTEMPT1 is set to the value 1.

When the determinations in steps S129 and S135 are Yes and the determination step in step S130 is No, the deviations DT1 and DT3 are larger than the predetermined value DTJUD and the deviation DT2 is less than the predetermined value DTJUD. In step S148, the flag F_FSDTEMPT2 indicates that the second temperature sensor is abnormal.
Set the value 1 to.

When the determinations in steps S133 and S136 are Yes and the determination in step S129 is No, the deviations DT2 and DT3 are larger than the predetermined value DTJUD and the deviation DT1 is less than the predetermined value DTJUD. Step S1
Proceeding to 49, which indicates that the third temperature sensor is abnormal, the flag F_FSDTEMPT3 is set to the value 1.

When the determination in step S129 is Yes and the determinations in steps S130 and S135 are No, the deviation DT1 is larger than the predetermined value DTJUD and the deviations DT2 and DT3 are less than the predetermined value DTJUD. In this case, the deviations DT2 and DT3 are compared in step S137. If the deviation DT3 is smaller than the deviation DT2, it is determined that the first temperature sensor is abnormal (S147). If the deviation DT2 is less than or equal to the deviation DT3, it is determined that the second temperature sensor is abnormal (S148). The determination is made based on the deviation DT
The first and third temperature sensors corresponding to 2 and the deviation DT
This is because, of the second and third temperature sensors corresponding to 3, the temperature sensor corresponding to the smaller deviation is considered to be normal.

When the determination in step S133 is Yes and the determinations in steps S129 and S136 are No, the deviation DT2 is larger than the predetermined value DTJUD and the deviations DT1 and DT3 are less than the predetermined value DTJUD. In this case, the deviations DT1 and DT3 are compared in step S138. If the deviation DT3 is smaller than DT1, it is determined that the first temperature sensor is abnormal (S147). Deviation DT1 is DT
If 3 or less, the third temperature sensor is determined to be abnormal (S
149).

When the determination in step S134 is Yes and the determinations in steps S129 and S133 are No, the deviation DT3 is larger than the predetermined value DTJUD and the deviations DT1 and DT2 are less than the predetermined value DTJUD. In this case, the deviations DT1 and DT2 are compared in step S139. If the deviation DT2 is smaller than DT1, the second temperature sensor is determined to be abnormal (S148). Deviation DT1 is DT
If it is 2 or less, it is determined that the third temperature sensor is abnormal (S
149).

By thus comparing the detection values of the plurality of temperature sensors relative to each other, it is possible to detect an abnormality that has occurred in any of the plurality of temperature sensors without being affected by a disturbance such as the outside air temperature. it can. Further, as shown in FIG. 5, by using the detection values of three or more temperature sensors, it is possible to determine which temperature sensor has an abnormality.

FIG. 6 is a flow chart of a process for detecting abnormality of the temperature sensor according to the second embodiment shown in FIG. In the example shown in FIG. 6, four temperature sensors (referred to as first to fourth temperature sensors) are used to determine whether or not each temperature sensor has an abnormality.

Since the process in steps S161 to S166 is the same as the process in steps S101 to S106 shown in FIG. 4, description thereof will be omitted. In step S167, the detection values T1, T2, T3 and T4 of the first to fourth temperature sensors are acquired. Step S1
At 68, the maximum value TMAX of the detected values T1 to T4 is obtained. In step S169, the minimum value TMIN of the detection values T1 to T4 is obtained.

In step S170, the detected values T1.about.
The average value TAVE of T4 is calculated as “(T1 + T2 + T3 + T4
-TMAX-TMIN) / 2 ". Thus, it is preferable to subtract the maximum value TMAX and the minimum value TMIN from the sum of the detected values T1 to T4 to obtain the average value. Even if an abnormal value is included, an appropriate average value can be obtained.

If there are n temperature sensors, the average value T
AVE is "(T1 +, ..., + Tn-TMAX-TMI
N) / (n-2) ".

In step S171, the deviation between the detected value T1 of the first temperature sensor and the average value TAVE is compared with the predetermined value DTJUD. If the deviation is larger than the predetermined value DTJUD, it is determined that the first temperature sensor is abnormal (S172).

In step S173, the deviation between the detected value T2 of the second temperature sensor and the average value TAVE is compared with the predetermined value DTJUD. If the deviation is larger than the predetermined value DTJUD, it is determined that the second temperature sensor is abnormal (S174).

In step S175, the deviation between the detected value T3 of the third temperature sensor and the average value TAVE is compared with the predetermined value DTJUD. If the deviation is larger than the predetermined value DTJUD, it is determined that the third temperature sensor is abnormal (S176).

In step S177, the deviation between the detected value T4 of the fourth temperature sensor and the average value TAVE is compared with the predetermined value DTJUD. If the deviation is larger than the predetermined value DTJUD, it is determined that the fourth temperature sensor is abnormal (S178).

If the determinations in steps S171, 173, 175 and 177 are all No, it is determined that all temperature sensors are normal (S179).

In this way, by comparing the detected value of each temperature sensor with the average value, it is possible to detect the abnormality of each temperature sensor without being affected by a disturbance such as the outside air temperature.

[0066]

According to the present invention, the abnormality of the temperature sensor can be detected without being affected by the disturbance such as the outside temperature.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control device for an internal combustion engine according to an embodiment of the present invention.

FIG. 2 is a block diagram of a vehicle control device according to an embodiment of the present invention.

FIG. 3 is a block diagram of a vehicle control device according to another embodiment of the present invention.

FIG. 4 is a flow chart of a process of detecting an abnormality of a temperature sensor when two temperature sensors are provided according to an embodiment of the present invention.

FIG. 5 is a flow chart of a process of detecting temperature sensor anomalies when three temperature sensors are provided, according to one embodiment of the invention.

FIG. 6 is a flowchart of a process of detecting an abnormality in a temperature sensor when four temperature sensors are provided according to another embodiment of the present invention.

[Explanation of symbols]

1 engine 11 Intake air temperature sensor 12 Engine water temperature sensor 16 Outside temperature sensor 19 Catalyst temperature sensor 23 Fuel temperature sensor 24 Tank temperature sensor

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02D 45/00 F02D 45/00 360J 364 364K 364Q 41/22 301 41/22 301K (72) Inventor Gosho Eisaku 1-4-1 Chuo 1-chome, Wako-shi, Saitama F-term in Honda R & D Co., Ltd. (reference) 3G084 BA33 DA27 EA07 EA11 EB22 EB25 EC01 FA00 FA02 FA20 3G301 JB01 JB09 NA01 NA06 NA08 NE23 PA10B PB01B PD12B PE08B PG00B

Claims (3)

[Claims] 1. A vehicle control device having a plurality of temperature detection means for detecting the temperature of a portion provided therein, wherein a deviation of two temperatures among a plurality of temperatures detected by the plurality of temperature detection means is calculated. Deviation calculating means for calculating, based on the deviation calculated by the deviation calculating means,
An abnormality detection unit that detects an abnormality in the plurality of temperature detection units, the vehicle control device. 2. A control device for a vehicle having a plurality of temperature detecting means for detecting the temperature of a provided portion, wherein an average value calculation for calculating an average value of a plurality of temperatures detected by the plurality of temperature detecting means. Means, a deviation calculating means for calculating a deviation between the temperature detected by each of the plurality of temperature detecting means and the average value, based on the deviation calculated by the deviation calculating means,
An abnormality detecting unit that detects an abnormality of each of the plurality of temperature detecting units, and a vehicle control device. 3. When the internal combustion engine of the vehicle is started after the internal combustion engine of the vehicle is stopped, it further comprises determination means for determining whether a predetermined time has elapsed from the stop, and the determination means determines the predetermined time. The deviation calculating means is implemented when it is determined that the time has elapsed.
Alternatively, the vehicle control device described in 2.