Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1998-12-03
2000-11-21
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
731181, F02M 3300
Patent
active
061488038
ABSTRACT:
A leakage diagnosing apparatus for an evaporated gas purge system, which executes purge system leakage diagnosis based on a detected pressure change amount and an introduced pressure which is introduced into a part of the purge system including at least a fuel tank and a canister. The detected pressure change amount is obtained by detecting pressure in the part of the purge system after such part of the purge system is hermetically sealed. Accordingly, the reliability of the leakage diagnosis is improved because an erroneous diagnosis caused by the introduced pressure is prevented. The detected pressure change amount may be compensated based on the introduced pressure into the sealed gas purge system. Accordingly, an erroneous leakage determination is prevented, and the reliability of leakage determination is improved.
REFERENCES:
patent: 5315980 (1994-05-01), Otsuka et al.
patent: 5317909 (1994-06-01), Yamada et al.
patent: 5425344 (1995-06-01), Otsuka et al.
patent: 5461569 (1995-10-01), Hara et al.
patent: 5679890 (1997-10-01), Shinohara et al.
patent: 5680849 (1997-10-01), Morikawa et al.
patent: 5857447 (1999-01-01), Shinohara
Co-pending, commonly owned U.S. application No. 09/113,281 of Fujimoto et al for "Abnormality Detection Apparatus for Preventing Fuel Gas Emission", filed Jul. 10, 1998.
Fujimoto Takeshi
Isomura Shigenori
Majima Yoshihiro
Miwa Makoto
Morikawa Junya
Denso Corporation
Moulis Thomas N.
LandOfFree
Leakage diagnosing device for fuel evaporated gas purge system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Leakage diagnosing device for fuel evaporated gas purge system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leakage diagnosing device for fuel evaporated gas purge system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1248397