Internal-combustion engines – Charge forming device – Auxiliary air or oxygen added to combustible mixture
Patent
1980-07-11
1982-04-20
Cuchlinski, Jr., William A.
Internal-combustion engines
Charge forming device
Auxiliary air or oxygen added to combustible mixture
123327, 137110, 261DIG19, F02M 712
Patent
active
043253490
ABSTRACT:
An air valve for a fuel supply system of an internal combustion engine is proposed, which assures good start-up of the engine and furnishes a fuel-air mixture required for combustion during overrunning. The air valve includes a housing, which is separated by a diaphragm into a first chamber and a second chamber. The first chamber communicates with the intake tube section dowstream of a throttle valve and the second chamber comunicates first with the intake tube upstream of the throttle valve and second with the intake tube downstream of the throttle valve. A valve plate guided by the diaphragm engages a valve seat sheath which is slidably supported in a mouthpiece. A flow cross section is formed between the valve seat sheath and the mouthpiece. Immediately following starting, additional air can bypass the throttle valve for the purpose of improved starting up of the engine. Upon attainment of a certain underpressure, the valve seat sheath is displaced in such a manner that a sealing step closes the flow cross section. At under pressures characterized by overrunning, the valve plate rises from the valve seat sheath and enables the supply of additional air to the engine.
REFERENCES:
patent: 1996219 (1935-04-01), Thomas
patent: 3949717 (1976-04-01), Rittmannsberger
patent: 4257227 (1981-03-01), Sato et al.
patent: 4276746 (1981-07-01), Yamanaka et al.
patent: 4289100 (1981-09-01), Kinugawa et al.
Cuchlinski Jr. William A.
Greigg Edwin E.
Robert & Bosch GmbH
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