Title:
内燃機関の異常診断装置及び内燃機関の制御システム
Document Type and Number:
Japanese Patent JP4462287
Kind Code:
B2
Abstract:
An ECU (60) for an engine (10, 70) monitors a change of an actual fuel pressure (NPC), when a target fuel pressure (PFIN) is changed stepwise. In one abnormality, the time required for the actual fuel pressure to reach the target fuel pressure is equal to that when an actuator (34) operates normally. However, the maximum value of a differential value (dNPC/dt) with respect to time of the actual fuel pressure is different from that when the actuator operates normally. For this reason, a normal range is set in advance for the maximum value of the differential value with respect to time of the actual fuel pressure and when the maximum value of the differential value with respect to time of the actual fuel pressure is out of the normal range, it is determined that the actuator operates abnormally.
Inventors:
Tomohiro Takahashi
Application Number:
JP2007112689A
Publication Date:
May 12, 2010
Filing Date:
April 23, 2007
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02D45/00; F02D41/22; F02M25/07; F02M55/02; F02M65/00
Domestic Patent References:
| JP6213049A | ||||
| JP2005337031A | ||||
| JP2006207434A | ||||
| JP10103140A | ||||
| JP6241128A |
Attorney, Agent or Firm:
Tsuyoshi Yamada