Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2008-01-08
2008-01-08
Moulis, Thomas (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
C073S118040
Reexamination Certificate
active
07316223
ABSTRACT:
An evaporated gas control system mounted on an automotive vehicle includes a canister for absorbing gas evaporated from a fuel tank and a purging passage for purging the evaporated gas into an engine. The purging passage is branched out to two passages, an upstream purging passage connected to an upstream portion of a throttle valve through an upstream valve and a downstream purging passage connected to a downstream portion of the throttle valve. Malfunction of the upstream purging passage including the upstream valve is detected based on changes in pressure of the air intake passage, which are responsive to opening and closing operations of the upstream valve. Preferably, the malfunction detecting process is performed by operating the upstream valve from a fully closed state to a fully open state under the condition where the throttle valve is fully closed.
REFERENCES:
patent: 4446940 (1984-05-01), Sakakibara
patent: 5005550 (1991-04-01), Bugin et al.
patent: 5183023 (1993-02-01), Hanson
patent: 5190015 (1993-03-01), Nakata et al.
patent: 5216991 (1993-06-01), Iida et al.
patent: 5269278 (1993-12-01), Heinemann et al.
patent: 5979418 (1999-11-01), Saruwatari et al.
patent: 6516786 (2003-02-01), Krimmer et al.
patent: 6880534 (2005-04-01), Yoshiki et al.
patent: 6910467 (2005-06-01), Murakami et al.
Denso Corporation
Moulis Thomas
Nixon & Vanderhye P.C.
LandOfFree
Device for detecting malfunction in evaporated gas purging... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for detecting malfunction in evaporated gas purging..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for detecting malfunction in evaporated gas purging... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2804833