JPS643220A - Cooling water system abnormality alarm device for engine - Google Patents
Cooling water system abnormality alarm device for engineInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-06-25 JP JP15833387A patent/JPS643220A/en active Pending
Cited By (13)
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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