Title:
VEHICLE
Document Type and Number:
Japanese Patent JP2016148260
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To carry out the failure diagnosis of a fuel pressure sensor without deteriorating exhaust performance.SOLUTION: A vehicle is equipped with a port injection valve injecting a fuel supplied from a feed pump into an engine; and a low pressure fuel pressure sensor detecting fuel pressure P which is the supply pressure of the fuel by the feed pump. In the vehicle, an engine ECU increases the fuel pressure P to diagnosis pressure P2 higher than normal control pressure P1, when the failure diagnosis of the low pressure fuel pressure sensor is carried out, and determines the presence/absence of a failure of the low pressure fuel pressure sensor on the basis of whether the output of the low pressure fuel pressure sensor at that time is a value indicating the diagnosis pressure P2 or not. The engine ECU, if it becomes excessive fuel(an air-fuel ratio rich) by increasing the fuel pressure P to the diagnosis pressure P2, changes an engine operation point so as to increase an engine load factor by decreasing engine rotation speed while keeping engine output.SELECTED DRAWING: Figure 7
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Inventors:
MIYAJI KAZUYA
Application Number:
JP2015024288A
Publication Date:
August 18, 2016
Filing Date:
February 10, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D45/00; F02D41/04; F02D41/22; F02D41/32
Domestic Patent References:
| JP2013068127A | 2013-04-18 | |||
| JP2013227934A | 2013-11-07 | |||
| JP2014034972A | 2014-02-24 | |||
| JP2006112270A | 2006-04-27 | |||
| JPH0463929A | 1992-02-28 | |||
| JP2013253508A | 2013-12-19 | |||
| JP2011047281A | 2011-03-10 |
Attorney, Agent or Firm:
Fukami patent office