Title:
THERMOSTAT ABNORMALITY DETERMINING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/189912
Kind Code:
A1
Abstract:
This thermostat abnormality determining device includes a cooling water temperature sensor, an estimated temperature calculating unit and a determining unit. The cooling water temperature sensor detects the temperature of cooling water that cools an engine. The estimated temperature calculating unit calculates an estimated temperature, which is an estimated value of the temperature of the cooling water. The determining unit determines if the thermostat has become stuck open after warming-up of the engine is complete. The criteria whereby the determining unit determines that the thermostat has become stuck open are that the estimated temperature is higher than a stuck-open determining temperature, which is a temperature lower than a warm-up completion temperature indicating that warming-up of the engine is complete, and that the cooling water temperature, which is the value detected by the cooling water temperature sensor, has been continuously at or below the stuck-open determining temperature for a determination period.
Inventors:
KANETA MOTOYOSHI (JP)
NAKANO HITOSHI (JP)
NAKANO HITOSHI (JP)
Application Number:
PCT/JP2016/055847
Publication Date:
December 01, 2016
Filing Date:
February 26, 2016
Export Citation:
Assignee:
HINO MOTORS LTD (JP)
International Classes:
F01P11/16; F01P3/20
Foreign References:
| JPH11117799A | 1999-04-27 | |||
| JPH11159379A | 1999-06-15 | |||
| JP2014020346A | 2014-02-03 |
Attorney, Agent or Firm:
ONDA, Makoto et al. (JP)
Makoto Onda (JP)
Makoto Onda (JP)
Download PDF: