Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1994-06-10
1995-10-24
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123118D, F02M 2508
Patent
active
054601428
ABSTRACT:
The invention relates to a method for venting a fuel tank for motor vehicles equipped with internal combustion engines. The tank-venting systems of these motor vehicles are equipped with a sensor for measuring tank pressure. The signal of the pressure sensor is utilized to control the tank-venting valve in such a manner that the flow resistance of the tank-venting valve is so adjusted via its opening condition in dependence upon the signal of the pressure sensor so that the scavenging rate is limited; that is, the flow volume through the tank-venting valve is limited. The scavenging rate is so limited that the tank pressure does not drop below a pregiven threshold. The tank-venting valve acts as a controllable flow throttle for preventing critical underpressures.
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Blumenstock Andreas
Denz Helmut
Moulis Thomas N.
Ottesen Walter
Robert & Bosch GmbH
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