Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1989-12-07
1992-01-14
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123519, 606051, F02M 3302
Patent
active
050800787
ABSTRACT:
A control system for an engine having both a fuel vapor recovery system and air/fuel ratio feedback control. The engine is equipped with a venturi in its intake passage. A vapor reservoir is coupled between the fuel vapor recovery system and a nozzle orifice positioned in the venturi throat. Vapor flow into the reservoir is regulated by a solenoid valve responsive to a pressure switch which is referenced to the venturi inlet pressure. Action of the pressure switch maintains reservoir pressure at the venturi inlet pressure such that vapor flow is linearly proportional to inducted air flow regardless of engine manifold pressure. In an alternate embodiment, the fuel tank is coupled to the venturi through a pressure regulating system as described above. The vapor recovery canister is independently coupled to the venturi through a similar pressure control system.
REFERENCES:
patent: 3680318 (1972-08-01), Nakajima
patent: 4026258 (1977-05-01), Ino
patent: 4445336 (1984-05-01), Inoue
patent: 4498443 (1985-02-01), Hasegawa
patent: 4530210 (1985-07-01), Yamazaki
patent: 4664087 (1987-05-01), Hamburg
patent: 4677956 (1987-07-01), Hamburg
patent: 4715340 (1987-12-01), Cook et al.
Abolins Peter
Ford Motor Company
Lippa Allan J.
Miller Carl Stuart
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