Emission control system with integrated evaporative canister pur

Details Emission control system with integrated evaporative canister pur Emission control system with integrated evaporative canister pur

1977-02-02

1982-01-05

Koczo, Jr., Michael

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02M 3702

Patent

active

043088414

ABSTRACT:
In an emission control system for a vehicle powered by an internal combustion engine, the purge of fuel vapor from a canister containing fuel vapor is effected through a purge valve operated by a control vacuum signal, as controlled by operation of a thermal vacuum switch, which signal is also applied to an exhaust gas recirculating valve, acting on one side of a diaphragm in the purge valve, the diaphragm being operative to control flow of fuel vapor supplied to a compartment on the opposite side of the diaphragm via a restricted inlet passage from the canister to a passage having a positive crankcase ventilation vacuum signal applied thereto with flow through the passage controlled by movement of the diaphragm.

REFERENCES:
patent: 3752134 (1973-08-01), Hollis
patent: 3762384 (1973-10-01), Day et al.
patent: 3935850 (1976-02-01), King
patent: 4031869 (1977-06-01), Onishi et al.
patent: 4044743 (1977-08-01), Eaton

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