Title:
冷却水温度センサーの異常判定装置
Document Type and Number:
Japanese Patent JP6625892
Kind Code:
B2
Abstract:
A coolant temperature sensor abnormality determination device includes an estimated temperature calculation unit configured to calculate an estimated temperature that is an estimated value of a temperature of a coolant that cools an engine and a determination unit configured to determine whether or not two coolant temperature sensors, which are configured to detect the temperature of the coolant, have an abnormality based on detection values of the two coolant temperature sensors and the estimated temperature. The determination unit has a determination permission condition under which a reference temperature is set to the estimated temperature of a present time point and the estimated temperature is then changed from the reference temperature by a determination temperature. The determination unit is configured to determine, when the determination permission condition is satisfied, that the two coolant temperature sensors are functioning normally if a discrepancy between the detection values of the two coolant temperature sensors is less than a normal temperature that is less than or equal to the determination temperature.
Inventors:
Kaneda Motoyoshi
Application Number:
JP2016024530A
Publication Date:
December 25, 2019
Filing Date:
February 12, 2016
Export Citation:
Assignee:
Hino Motors Ltd.
International Classes:
F02D45/00; F01P7/16; F01P11/16; F02M26/05; F02M26/27
Domestic Patent References:
| JP2012102687A | ||||
| JP2000303898A | ||||
| JP11159379A | ||||
| JP2015169166A | ||||
| JP2012127324A | ||||
| JP201174829A | ||||
| JP2003227337A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda