JPS643220A - Cooling water system abnormality alarm device for engine - Google Patents

Cooling water system abnormality alarm device for engine

Info

Publication number
JPS643220A
JPS643220A JP15833387A JP15833387A JPS643220A JP S643220 A JPS643220 A JP S643220A JP 15833387 A JP15833387 A JP 15833387A JP 15833387 A JP15833387 A JP 15833387A JP S643220 A JPS643220 A JP S643220A
Authority
JP
Japan
Prior art keywords
cooling water
water temperature
engine speed
water system
abnormality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15833387A
Other languages
Japanese (ja)
Inventor
Takao Naito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Original Assignee
Fuji Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Heavy Industries Ltd filed Critical Fuji Heavy Industries Ltd
Priority to JP15833387A priority Critical patent/JPS643220A/en
Publication of JPS643220A publication Critical patent/JPS643220A/en
Pending legal-status Critical Current

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  • Testing Of Engines (AREA)

Abstract

PURPOSE:To enable early warning of the abnormality of a cooling water system in detecting the abnormality from an engine speed and a cooling water temperature by determining the abnormality when a temperature difference due to a change in water temperature after a predetermined time after starting is not greater than the reference value. CONSTITUTION:A control unit 3 receives detection values from a starter switch 9, cylinder inner pressure sensor 10, engine speed sensor 11, cooling water temperature sensor 12, etc. The control unit 3 carries out predetermined computation according to an engine speed and a cooling water temperature, and determines abnormality of a cooling water system. When complete explosion in an engine is detected from the engine speed and a cylinder inner pressure at starting, a complete explosion water temperature is detected from a warmed-up engine speed and an output from the water temperature sensor 12, and a difference between the complete explosion water temperature and a water temperature after a predetermined time. If the difference is lower than a predetermined reference temperature difference, it is determined that the cooling water system is abnormal because of freezing or the like of the cooling water system, and an alarm device 13 is operated.
JP15833387A 1987-06-25 1987-06-25 Cooling water system abnormality alarm device for engine Pending JPS643220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15833387A JPS643220A (en) 1987-06-25 1987-06-25 Cooling water system abnormality alarm device for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15833387A JPS643220A (en) 1987-06-25 1987-06-25 Cooling water system abnormality alarm device for engine

Publications (1)

Publication Number Publication Date
JPS643220A true JPS643220A (en) 1989-01-09

Family

ID=15669351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15833387A Pending JPS643220A (en) 1987-06-25 1987-06-25 Cooling water system abnormality alarm device for engine

Country Status (1)

Country Link
JP (1) JPS643220A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990052715A (en) * 1997-12-23 1999-07-15 정몽규 Engine cooling alarm of car
WO2002092976A1 (en) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Method for monitoring a coolant circuit of an internal combustion engine
KR100376667B1 (en) * 1999-08-16 2003-03-15 현대자동차주식회사 Method for sensing out of order thermostat of vehicle
US6679110B2 (en) 1996-12-17 2004-01-20 Denso Corporation Thermostat malfunction detecting system for engine cooling system
KR100482543B1 (en) * 2001-10-11 2005-04-14 현대자동차주식회사 Method for detecting a malfunction of a thermostat
CN113969823A (en) * 2021-09-30 2022-01-25 湖南道依茨动力有限公司 Water temperature monitoring method and device and engineering machinery

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7024926B2 (en) 1996-12-17 2006-04-11 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US6679110B2 (en) 1996-12-17 2004-01-20 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US6725710B2 (en) 1996-12-17 2004-04-27 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US6957570B2 (en) 1996-12-17 2005-10-25 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US7010967B2 (en) 1996-12-17 2006-03-14 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US7047799B2 (en) 1996-12-17 2006-05-23 Denso Corporation Thermostat malfunction detecting system for engine cooling system
US7137295B2 (en) 1996-12-17 2006-11-21 Denso Corporation Thermostat malfunction detecting system for engine cooling system
KR19990052715A (en) * 1997-12-23 1999-07-15 정몽규 Engine cooling alarm of car
KR100376667B1 (en) * 1999-08-16 2003-03-15 현대자동차주식회사 Method for sensing out of order thermostat of vehicle
WO2002092976A1 (en) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Method for monitoring a coolant circuit of an internal combustion engine
US6862518B2 (en) 2001-05-12 2005-03-01 Robert Bosch Gmbh Method for monitoring a coolant circuit of an internal combustion engine
KR100482543B1 (en) * 2001-10-11 2005-04-14 현대자동차주식회사 Method for detecting a malfunction of a thermostat
CN113969823A (en) * 2021-09-30 2022-01-25 湖南道依茨动力有限公司 Water temperature monitoring method and device and engineering machinery

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