Abnormality diagnosis apparatus for high pressure fuel...

Internal-combustion engines – Charge forming device – Fuel injection system

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C123S445000, C123S446000

Reexamination Certificate

active

06871633

ABSTRACT:
Apparatus for diagnosing high pressure fuel system of a cylinder injection type engine includes fuel pump (18), spill valve (33), fuel injectors (15), fuel pressure sensor (19) and fuel pressure control means (30). A control period for the pump (18) covers an intake period and a discharge period. The discharge period covers spill valve closing period and spill valve opening period. Fuel pressure control means (30) includes spill valve control period setting means for adjusting spill valve closing/opening periods, abnormality decision period detecting means for detecting as abnormality decision period the spill valve opening period during the discharge period in the engine operation, pressure change arithmetic means for determining change of the fuel pressure (PF) on the basis of the abnormality decision period, and diagnosing means for deciding as to abnormality of the spill valve (33), based on the change of the fuel pressure (PF).

REFERENCES:
patent: 3817231 (1974-06-01), O'Neill
patent: 6394072 (2002-05-01), Yoshida et al.
patent: 04-109052 (1992-10-01), None
patent: 06-213051 (1994-02-01), None
patent: 10-9028 (1998-01-01), None
patent: 11-82134 (1999-03-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Abnormality diagnosis apparatus for high pressure fuel... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Abnormality diagnosis apparatus for high pressure fuel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abnormality diagnosis apparatus for high pressure fuel... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3444910

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.