WO2011111174A1 - センサ異常検出装置及びブロックヒータ装着判定装置 - Google Patents
センサ異常検出装置及びブロックヒータ装着判定装置 Download PDFInfo
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- WO2011111174A1 WO2011111174A1 PCT/JP2010/053903 JP2010053903W WO2011111174A1 WO 2011111174 A1 WO2011111174 A1 WO 2011111174A1 JP 2010053903 W JP2010053903 W JP 2010053903W WO 2011111174 A1 WO2011111174 A1 WO 2011111174A1
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- temperature
- cooling water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2031/00—Fail safe
Definitions
- the present invention relates to a sensor abnormality detection device, a block heater attachment determination device, and the like mounted on a vehicle including an electric water pump that circulates engine cooling water.
- a control device for an internal combustion engine having a function of keeping the cooling water of the internal combustion engine by supplying current from an external power source to a block heater mounted on the internal combustion engine while the internal combustion engine is cold
- the block when the engine is stopped Focusing on the relationship between whether the heater is energized and the behavior of the coolant temperature immediately after the engine is started, the block heater is determined based on the behavior of the coolant temperature immediately after the engine is started, and whether the block heater is energized while the engine is stopped.
- a technique is known that prohibits cooling system abnormality diagnosis or corrects abnormality diagnosis conditions when it is determined by the determination means that the block heater is energized (see, for example, Patent Document 1).
- the present invention provides a sensor abnormality detection device and a block heater mounting determination that can accurately detect the presence or absence of energization of the block heater and reflect the presence or absence of energization of the block heater in sensor abnormality determination while achieving power saving.
- the purpose is to provide devices.
- a detection result of a first temperature sensor mounted on a vehicle including an electric water pump for circulating engine cooling water and detecting the temperature of engine cooling water, and an engine Based on the detection result of the second temperature sensor that detects the temperature of another medium having a correlation with the temperature of the cooling water, or the estimated result of the temperature of the engine cooling water, the first temperature sensor or the first temperature sensor
- a sensor abnormality detection device that executes abnormality detection processing of two temperature sensors, When the detection result of the first temperature sensor and the detection result of the second temperature sensor or the estimation result of the temperature of the engine cooling water do not satisfy a predetermined relationship under the non-operation of the electric water pump after starting the engine The water pump forcibly operating the electric water pump, After the forced operation of the electric water pump by the water pump forced operation unit, based on the detection result of the first temperature sensor, if a decrease in the temperature of the engine cooling water is observed, the abnormality detection process is prohibited.
- a sensor abnormality detection device is provided, wherein the
- a sensor abnormality detection device and a block heater mounting determination capable of accurately detecting the presence / absence of energization of a block heater and reflecting the presence / absence of energization of the block heater in the sensor abnormality determination while achieving power saving.
- a device or the like is obtained.
- FIG. 1 is a schematic configuration diagram of an entire engine control system according to an embodiment of the present invention.
- An air cleaner 13 is provided at the most upstream portion of the intake pipe 12 of the engine 11 that is an internal combustion engine, and an air flow meter 14 for detecting the amount of intake air is provided downstream of the air cleaner 13.
- An intake air temperature sensor 14a for detecting the intake air temperature (outside air temperature) is provided.
- the air flow meter 14 may be a hot wire type or hot film type air flow meter incorporating an intake air temperature sensor 14a.
- a throttle valve 16 whose opening is adjusted by a motor 15 and a throttle opening sensor 17 for detecting the opening (throttle opening) of the throttle valve 16 are provided on the downstream side of the air flow meter 14.
- a surge tank 18 is provided downstream of the throttle valve 16, and an intake pipe pressure sensor 19 for detecting the intake pipe pressure is provided in the surge tank 18.
- the surge tank 18 is provided with an intake manifold 20 for introducing air into each cylinder of the engine 11, and a fuel injection valve 21 for injecting fuel is attached in the vicinity of the intake port of the intake manifold 20 of each cylinder. Yes.
- An ignition plug 22 is attached to the cylinder head of the engine 11 for each cylinder, and the air-fuel mixture in the cylinder is ignited by spark discharge of each ignition plug 22.
- a catalyst 24 such as a three-way catalyst for purifying CO, HC, NOx and the like in the exhaust gas is installed in the exhaust pipe 23 (exhaust passage) of the engine 11, and the air-fuel ratio of the exhaust gas is upstream of the catalyst 24.
- an exhaust gas sensor 25 for detecting rich / lean or the like is installed.
- a crank angle sensor 26 that outputs a pulse signal every time the crankshaft rotates a predetermined crank angle is attached to the engine 11, and the crank angle and the engine rotation speed are detected based on the output signal of the crank angle sensor 26.
- the cooling water circulation circuit 28 through which the cooling water of the engine 11 circulates includes a radiator 29 that dissipates heat of the cooling water, a thermostat valve 30 that controls the cooling water circulation flow rate to the radiator 29, and an electric water pump that circulates the cooling water. 31 is provided.
- the electric water pump 31 operates based on electric power from an in-vehicle battery (not shown).
- a cooling water temperature sensor 32 is installed in the vicinity of the cooling water outlet of the engine 11 in the cooling water circulation circuit 28.
- the cooling water temperature sensor 32 detects the temperature (cooling water temperature) of the cooling water flowing from the engine 11 into the cooling water circulation circuit 28.
- the cooling water temperature sensor 32 may be provided at any position as long as the temperature of the cooling water of the engine 11 can be detected.
- a cooling fan 33 for forcibly cooling the cooling water is installed on the back side of the radiator 29.
- a block heater 34 for preventing freezing is attached to the cylinder block of the engine 11.
- a power cord 35 is connected to the block heater 34.
- the user plugs the plug 36 of the power cord 35 of the block heater 34 into a household power outlet (not shown). And the block heater 34 is energized to keep the cooling water of the engine 11 warm and prevent freezing.
- a user removes the plug 36 of the power cord 35 from a household power outlet, and stores it in an appropriate place in the engine room.
- the power cord 35 of the block heater 34 remains stored in the engine room even when the engine is stopped. Is not energized.
- the outputs of various sensors such as the cooling water temperature sensor 32 described above are input to an electronic control unit (hereinafter referred to as “ECU”) 41.
- the power supply terminal of the ECU 41 is supplied with a power supply voltage Vb from a vehicle-mounted battery (not shown) via the main relay 42.
- the relay drive coil 42b that drives the relay contact 42a of the main relay 42 is connected to the main relay control terminal of the ECU 41.
- the relay drive coil 42b When the relay drive coil 42b is energized, the relay contact 42a is turned on, and the ECU 41 Etc. are supplied with a power supply voltage. Then, by turning off the energization to the relay drive coil 42b, the relay contact 42a is turned off, and the power supply to the ECU 41 and the like is turned off.
- An ON / OFF signal of an ignition switch (hereinafter referred to as “IG switch”) 43 is input to the IG switch terminal of the ECU 41.
- IG switch 43 When the IG switch 43 is turned on, the main relay 42 is turned on and power supply to the ECU 41 and the like is started.
- the IG switch 43 When the IG switch 43 is turned off, the main relay 42 is turned off after processing for stopping the engine is performed. The power supply to the ECU 41 and the like is turned off.
- the ECU 41 has a built-in soak timer 44 that operates with a backup power source (not shown) as a power source.
- the soak timer 44 starts a time measuring operation after the engine is stopped (after the IG switch 43 is turned off), and measures an elapsed time after the engine is stopped.
- the ECU 41 is constituted by a microcomputer, and includes, for example, a CPU, a ROM for storing a control program, a readable / writable RAM for storing calculation results, a timer, a counter, an input interface, an output interface, and the like.
- the ECU 41 controls the fuel injection amount of the fuel injection valve 21 and the ignition timing of the spark plug 22 according to the engine operating state by the CPU executing various engine control programs stored in the ROM.
- the ECU 41 executes various programs stored in the ROM by the CPU, so that the sensor abnormality detection device 50, the block heater attachment determination device 60, and the control device for the electric water pump according to the present invention.
- One embodiment of each of 70 is implemented.
- FIG. 2 is a functional block diagram showing the main functions of the ECU 41 related to the sensor abnormality detection process.
- the ECU 41 includes a sensor abnormality determination unit 52, a block heater determination unit 54, a W / P forced operation unit 72 that forcibly operates the electric water pump 31, and normal control of the electric water pump 31.
- W / P normal control part 74 which performs.
- the sensor abnormality determination unit 52, the block heater determination unit 54, and the W / P forcible operation unit 72 cooperate to realize an embodiment of the sensor abnormality detection device 50. Further, the block heater determination unit 54 and the W / P forced operation unit 72 cooperate to realize an embodiment of the block heater mounting determination device 60. In addition, the W / P forced operation unit 72 and the W / P normal control unit 74 cooperate to realize an embodiment of the control device 70 for the electric water pump.
- the function of each part will be described in detail.
- FIG. 3 is a flowchart showing a flow of an example of main processing realized by the sensor abnormality detection device 50 of the present embodiment.
- the processing routine shown in FIG. 3 is started when the engine is started (warm up).
- step 300 the sensor abnormality determination unit 52 determines whether or not the vehicle has been soaked for 7 hours or more based on the information of the soak timer 44. That is, it is determined whether or not the engine stop state has been maintained for 7 hours or more after the previous engine stop. If the vehicle has been soaked for more than 7 hours, the process proceeds to step 302, and if the vehicle has not been soaked for more than 7 hours (that is, if the vehicle has been soaked for less than 7 hours), this time the engine is started It is determined that the abnormality determination cannot be performed with high accuracy, and the process ends.
- step 302 if the absolute value of the difference between the cooling water temperature and the intake air temperature is smaller than 20 ° C., the process proceeds to step 314. On the other hand, if the absolute value of the difference between the cooling water temperature and the intake air temperature is 20 ° C. or higher, the routine proceeds to step 304.
- step 304 the W / P forcible operation unit 72 forcibly drives the electric water pump 31.
- the electric water pump 31 operates, and the cooling water of the engine 11 starts to circulate in the cooling water circulation circuit 28.
- step 306 the block heater determination unit 54 monitors the detection result of the cooling water temperature sensor 32 after the electric water pump 31 is forcibly driven in step 304, and the cooling water temperature after the electric water pump 31 is forcibly driven in step 304. It is determined whether or not a decrease in the frequency is observed.
- the circulation of the cooling water in the cooling water circulation circuit 28 is stopped. Therefore, when the block heater 34 is energized while the engine is stopped, the coolant in the cylinder block of the engine 11 near the block heater 34 in the coolant circulation circuit 28 is sufficiently transferred to the heat of the block heater 34. A relatively high temperature. On the other hand, the heat of the block heater 34 is hardly transmitted to the cooling water on the radiator 29 side away from the block heater 34. For this reason, the cooling water temperature on the radiator 29 side tends to be considerably lower than the cooling water temperature on the engine 11 side.
- lines X1 and X2 show an example of a change pattern of the cooling water temperature (detected value of the cooling water temperature sensor 32) when the block heater 34 is energized
- the line X3 shows the energization of the block heater 34.
- An example of a change pattern of the cooling water temperature (detected value of the cooling water temperature sensor 32) when there is no air heater or when the block heater 34 itself is not attached is shown.
- the detected value of the cooling water temperature sensor 32 tends to drop after temporarily rising If so, the detection value of the cooling water temperature sensor 32 may tend to decrease as it is. In any case, the presence or absence of energization of the block heater 34 can be accurately determined by observing the decrease in the cooling water temperature.
- step 306 If a decrease in the coolant temperature is observed in step 306, the block heater 34 is energized while the engine is stopped. Therefore, it is determined that the sensor abnormality determination cannot be performed accurately at the time of the current engine start, and the process ends. To do. On the other hand, if a decrease in the cooling water temperature is not observed, the process proceeds to step 308.
- step 308 the sensor abnormality determination unit 52 again determines that the absolute value of the difference between the cooling water temperature and the intake air temperature is smaller than 20 ° C. based on the latest detection results of the intake air temperature sensor 14a and the cooling water temperature sensor 32. It is determined whether or not. If the absolute value of the difference between the cooling water temperature and the intake air temperature is smaller than 20 ° C. in step 308, the process proceeds to step 312. On the other hand, if the absolute value of the difference between the cooling water temperature and the intake air temperature is 20 ° C. or higher, the process proceeds to step 310.
- the sensor abnormality determination unit 52 generates and outputs a determination result indicating that at least one of the intake air temperature sensor 14a and the cooling water temperature sensor 32 is abnormal.
- the sensor abnormality determination unit 52 turns on a warning lamp 46 provided on the instrument panel of the driver's seat or displays a warning on the warning display unit to warn the driver, and the abnormality information (abnormality) Code) is stored in a predetermined memory of the ECU 41, and this routine is terminated.
- the sensor abnormality determination unit 52 generates and outputs a determination result indicating that either the intake air temperature sensor 14a or the cooling water temperature sensor 32 is normal.
- the electric water pump 31 is forcibly driven only when the relationship between the cooling water temperature and the intake air temperature is abnormal or indicates the possibility at the time of engine start (during warm-up). Therefore, it is possible to accurately detect whether or not the block heater 34 is energized and reflect it in the sensor abnormality determination while saving power compared to the configuration in which the electric water pump 31 is always driven when the engine is started.
- the determination condition performed in step 302 and the determination condition performed in step 308 are the same, but they may be different from each other.
- the determination condition performed in the above step 302 may be stricter than the determination condition performed in the above step 308 (for example, the absolute value of the difference between the cooling water temperature and the intake air temperature is higher than 15 ° C. Whether it is small or not).
- FIG. 6 is a flowchart showing the flow of another example of the main processing realized by the sensor abnormality detection device 50 of this embodiment.
- the processing routine shown in FIG. 6 is started when the engine is started (warm up).
- the sensor abnormality detection process shown in FIG. 6 is mainly different from the sensor abnormality detection process shown in FIG. 3 in that the processes in steps 308 and 312 do not exist.
- the sensor abnormality detection process shown in FIG. 3 when the block heater 34 is not energized, the final abnormality determination process of step 308 is performed, and when the block heater 34 is energized, the final process of step 308 is performed.
- the sensor abnormality detection process shown in FIG. 3 when the block heater 34 is not energized, the final abnormality determination process of step 308 is performed, and when the block heater 34 is energized, the final process of step 308 is performed.
- step 302 is validated to reflect whether the block heater 34 is energized or not in the sensor abnormality determination.
- the electric water pump 31 is forcibly driven only when the relationship between the cooling water temperature and the intake air temperature is abnormal or indicates the possibility at the time of starting the engine. In some cases, it is possible to accurately detect whether the block heater 34 is energized and reflect it in the sensor abnormality determination while saving power compared to the configuration in which the electric water pump 31 is always driven.
- FIG. 7 is a flowchart showing the flow of still another example of the main processing realized by the sensor abnormality detection device 50 of this embodiment.
- the processing routine shown in FIG. 7 is started when the engine is started (warm up).
- the sensor abnormality detection process shown in FIG. 7 is mainly different from the sensor abnormality detection process shown in FIG. 3 in that a process of step 316 is added.
- the sensor abnormality detection process shown in FIG. 3 when the block heater 34 is energized, the final abnormality determination process in step 308 is prohibited.
- the sensor abnormality detection process shown in FIG. If there is a power supply 34, the sensor abnormality determination is executed by another special determination method.
- step 316 sensor abnormality determination is performed when the block heater 34 is energized.
- This sensor abnormality determination method may be any method as long as it takes into account that the block heater 34 is energized.
- the temperature near the minimum value of the cooling water temperature after the electric water pump 31 is forcibly driven is detected by the cooling water temperature sensor 32, and the absolute value of the difference between the temperature and the intake air temperature is 20 It may be determined whether or not the temperature is lower than ° C.
- the determination threshold (20 ° C. in the above example) may be corrected (changed) in consideration of the influence of energization of the block heater 34.
- the electric water pump 31 is forcibly driven only when the relationship between the cooling water temperature and the intake air temperature is abnormal or indicates the possibility at the time of engine startup. In some cases, it is possible to accurately detect whether the block heater 34 is energized and reflect it in the sensor abnormality determination while saving power compared to the configuration in which the electric water pump 31 is always driven.
- FIG. 8 is a flowchart showing a flow of an example of main processing realized by the control device 70 of the electric water pump of this embodiment.
- the processing routine shown in FIG. 8 is started when the engine is started (when the ignition is on).
- the processing routine shown in FIG. 8 is executed in parallel with the sensor abnormality detection processing shown in FIG.
- step 800 the W / P forced operation unit 72 determines whether or not the forced drive condition of the electric water pump 31 is satisfied.
- the forced driving condition of the electric water pump 31 is established when the absolute value of the difference between the cooling water temperature and the intake air temperature is 20 ° C. or more, and is notified by the sensor abnormality determination unit 52. If the forced drive condition of the electric water pump 31 is satisfied, the process proceeds to step 802. If the forced drive condition of the electric water pump 31 is not satisfied, the process proceeds to step 804.
- step 802 the W / P forcible operation unit 72 forcibly drives the electric water pump 31 (see step 304 above). As a result, the electric water pump 31 operates, and the cooling water of the engine 11 starts to circulate in the cooling water circulation circuit 28.
- Step 804 the W / P normal control unit 74 determines whether or not the normal operation condition of the electric water pump 31 is satisfied.
- the normal operating condition may be arbitrary as long as it is not always established from the time of engine start. For example, the normal operating condition may be established when the engine warm-up is completed.
- the normal operating conditions may be defined by a plurality of parameters such as vehicle speed, engine speed, intake air amount, intake air temperature, cooling water temperature, and the like. Further, the normal operating condition may be satisfied even when the cooling water temperature sensor 32 fails. If the normal operation condition of the electric water pump 31 is satisfied in step 804, the process proceeds to step 806.
- step 806 the W / P normal control unit 74 operates the electric water pump 31 according to the appropriately determined required flow rate (executes normal control). This normal control is continuously executed until the ignition switch is turned off (until the determination at step 808 is YES).
- the absolute value of the difference between the cooling water temperature and the intake air temperature at the time of starting the engine is evaluated by utilizing the correlation between the engine cooling water temperature and the intake air temperature (see FIG. 4).
- the temperature of another medium correlated with the cooling water temperature may be used instead of the intake air temperature.
- the detection result of the intake air temperature sensor 14a the detection result of the engine oil temperature sensor that detects the engine oil temperature may be used similarly.
- the detection result of the transmission oil temperature sensor that detects the transmission oil temperature may be used in the same manner.
- the detection result of the outside air temperature sensor that detects the outside air temperature may be used in the same manner.
- the relationship between these various temperatures and the temperature of engine cooling water may be evaluated comprehensively.
- the presence or absence of abnormality of the cooling water temperature sensor 32 may be determined by evaluating the relationship between the engine cooling water temperature and its estimated value (expected value).
- the estimated value may be derived using the temperature of another medium that correlates with the cooling water temperature, such as the detection result of the intake air temperature sensor 14a, or the soak acquired at the time of self-startup or the like It may be derived using the detected value of the cooling water temperature sensor 32 inside.
- the determination result indicating that at least one of the intake air temperature sensor 14a and the cooling water temperature sensor 32 is abnormal is generated. Further, it may be specified.
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Abstract
Description
エンジン始動後の電動ウォータポンプの非作動下で、前記第1温度センサの検出結果と前記第2温度センサの検出結果又は前記エンジン冷却水の温度の推定結果とが所定の関係を満たさない場合に、電動ウォータポンプを強制作動させるウォータポンプ強制作動部を備え、
前記ウォータポンプ強制作動部による電動ウォータポンプの強制作動後に、前記第1温度センサの検出結果に基づいて、エンジン冷却水の温度の低下が観測された場合には、前記異常検出処理を禁止する、前記異常検出処理による異常検出結果を無効化する、又は、前記異常検出処理における異常検出方法を変更することを特徴とする、センサ異常検出装置が提供される。
12 吸気管
13 エアクリーナ
14 エアフローメータ
14a 吸気温センサ
15 モータ
16 スロットルバルブ
17 スロットル開度センサ
18 サージタンク
19 吸気管圧力センサ
20 吸気マニホールド
21 燃料噴射弁
22 点火プラグ
23 排気管
24 触媒
25 排出ガスセンサ
26 クランク角センサ
28 冷却水循環回路
29 ラジエータ
30 サーモスタットバルブ
31 電動ウォータポンプ
32 冷却水温センサ
33 冷却ファン
34 ブロックヒータ
35 電源コード
36 プラグ
41 ECU
42 メインリレー
42a リレー接点
42b リレー駆動コイル
43 IGスイッチ
44 ソークタイマ
46 警告ランプ
50 センサ異常検出装置
52 センサ異常判定部
54 ブロックヒータ判定部
60 ブロックヒータ装着判定装置
70 電動ウォータポンプの制御装置
72 W/P強制作動部
74 W/P通常制御部
Claims (5)
- エンジン冷却水を循環させる電動ウォータポンプを備える車両に搭載され、エンジン冷却水の温度を検出する第1温度センサの検出結果と、エンジン冷却水の温度に相関関係を有する他の媒体の温度を検出する第2温度センサの検出結果、又は、エンジン冷却水の温度の推定結果との関係に基づいて、前記第1温度センサ又は前記第2温度センサに関する異常検出処理を実行するセンサ異常検出装置であって、
エンジン始動後の電動ウォータポンプの非作動下で、前記第1温度センサの検出結果と前記第2温度センサの検出結果又は前記エンジン冷却水の温度の推定結果とが所定の関係を満たさない場合に、電動ウォータポンプを強制作動させるウォータポンプ強制作動部を備え、
前記ウォータポンプ強制作動部による電動ウォータポンプの強制作動後に、前記第1温度センサの検出結果に基づいて、エンジン冷却水の温度の低下が観測された場合には、前記異常検出処理を禁止する、前記異常検出処理による異常検出結果を無効化する、又は、前記異常検出処理における異常検出方法を変更することを特徴とする、センサ異常検出装置。 - 前記ウォータポンプ強制作動部による電動ウォータポンプの強制作動後に、前記第1温度センサの検出結果に基づいて、エンジン冷却水の温度の低下が観測されない場合に、前記異常検出処理を再度実行し又は前記異常検出処理による異常検出結果を有効化することを特徴とする、請求項1に記載のセンサ異常検出装置。
- 前記第1温度センサの検出結果と前記第2温度センサの検出結果との関係に基づいて、前記第1温度センサ又は前記第2温度センサに関する異常検出処理を実行する請求項1に記載のセンサ異常検出装置であって、
前記第1温度センサの検出結果と前記第2温度センサの検出結果とが前記所定の関係を満たさない場合に、前記第1及び第2温度センサの少なくともいずれか一方の異常を表す異常検出結果を生成し、前記第1温度センサの検出結果と前記第2温度センサの検出結果とが前記所定の関係を満たす場合に、前記第1及び第2温度センサの正常を表す異常検出結果を生成する、センサ異常検出装置。 - エンジン冷却水を循環させる電動ウォータポンプを備える車両に搭載され、エンジン停止中におけるブロックヒータの通電の有無を判定するブロックヒータ装着判定装置であって、
エンジン始動後の電動ウォータポンプの非作動下で、エンジン冷却水の温度を検出する第1温度センサの検出結果と、エンジン冷却水の温度に相関関係を有する他の媒体の温度を検出する第2温度センサの検出結果、又は、エンジン冷却水の温度の推定結果とが所定の関係を満たさない場合に、電動ウォータポンプを強制作動させるウォータポンプ強制作動部を備え、
前記ウォータポンプ強制作動部による電動ウォータポンプの強制作動後に、前記第1温度センサの検出結果に基づいて、エンジン冷却水の温度の低下が観測された場合に、ブロックヒータの通電有りと判定することを特徴とする、ブロックヒータ装着判定装置。 - エンジン冷却水を循環させる電動ウォータポンプの制御装置であって、エンジン始動後から所定の作動条件が成立するまで電動ウォータポンプを非作動状態に維持する電動ウォータポンプの制御装置において、
エンジン始動後の電動ウォータポンプの非作動下で、エンジン冷却水の温度を検出する第1温度センサの検出結果と、エンジン冷却水の温度に相関関係を有する他の媒体の温度を検出する第2温度センサの検出結果、又は、エンジン冷却水の温度の推定結果とが所定の関係を満たさない場合に、電動ウォータポンプを強制作動させることを特徴とする、電動ウォータポンプの制御装置。
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