Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1995-02-01
1996-03-26
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123198D, F02M 3704
Patent
active
055011985
ABSTRACT:
Operation of a fuel vapor control apparatus having a canister and a fuel vapor purging passage is detected occasionally by a pressure sensor which is disposed in a fuel tank of an engine. The sensor detects pressure changes in the purging passage caused by closing or opening the passage between the canister and a suction pipe of the engine, and by introducing or by interrupting the air flowing into the canister. A computer calculates signals generated by the sensor and decides whether or not any failure has occurred in the fuel vapor control apparatus. An air intake unit which has an air filter and an air switching valve is detachably installed close to the canister. When the air switching valve is controlled to introduce the air into the canister, the air passes the filter before the switching valve so that the valve may not be subject to dust or foreign particles contained in the air and good sealing of the valve is ensured for long time. As a result, highly reliable failure detection is attained, and the apparatus is easy to be installed in a vehicle.
REFERENCES:
patent: 4175526 (1974-11-01), Phelan
patent: 4598686 (1986-07-01), Lupoli
patent: 4658796 (1987-04-01), Yoshida
patent: 5327873 (1994-07-01), Ohuchi
patent: 5363828 (1994-11-01), Yamashita
Miller Carl S.
Nippondenso Co. Ltd.
LandOfFree
Fuel vapor control apparatus for an internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel vapor control apparatus for an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel vapor control apparatus for an internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-910517