Title:
ABNORMALITY DETERMINATION DEVICE FOR FUEL PRESSURE SENSOR
Document Type and Number:
Japanese Patent JP2016130475
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To perform the abnormality determination of a fuel pressure sensor with high accuracy.SOLUTION: An abnormality determination device for the fuel pressure sensor includes a fuel pressure sensor 92 arranged in a fuel supply passage between a fuel pressure change part and a fuel injection valve, and a determination part for acquiring a fuel pressure change correlation value having a correlation with a variation in the output value of the fuel pressure sensor while using the fuel pressure change part for increasing the pressure of fuel, and executing abnormality determination of whether the fuel pressure sensor is abnormal or not on the basis of a result of caparison of the acquired fuel pressure change correlation value with a predetermined threshold value. The determination part executes the abnormality determination when an internal combustion engine is being stopped (Step 310), if two conditions are established that an elapsed time tsoak as a time from the stop of the internal combustion engine is a predetermined time tsp or longer (Step 320) and a temperature Thw of cooling water for the internal combustion engine is a predetermined temperature Thwth or lower (Step 330).SELECTED DRAWING: Figure 3
Inventors:
HASEGAWA KAZUHIRO
Application Number:
JP2015005009A
Publication Date:
July 21, 2016
Filing Date:
January 14, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D45/00; F02D41/22; F02M37/08; F02M55/02; F02M63/00; F02M69/00
Attorney, Agent or Firm:
Patent business corporation Prospec patent office