Regulated flow canister purge system

Details Regulated flow canister purge system Regulated flow canister purge system

1990-10-04

1991-09-24

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123518, F02M 2508

Patent

active

050505688

ABSTRACT:
The evaporative emission control system for an internal combustion engine purges the vapor collection canister to the intake manifold through a purge regulator controlled by the engine ECU. The purge regulator comprises a diaphragm valve and an electronic vacuum regulator. The purge regulator functions to allow a purge flow rate correlated with a control signal from the engine ECU and manifold vacuum, to maintain the purge flow rate substantially constant in response to certain changes in the magnitude of manifold vaccum, and to re-adjust the purge flow rate in correlation with changes in the control signal from the engine ECU.

REFERENCES:
patent: 3575152 (1971-04-01), Wenworth
patent: 4059081 (1977-11-01), Kayanuma
patent: 4411241 (1983-10-01), Ishida
patent: 4646702 (1987-03-01), Matsubara
patent: 4703737 (1987-11-01), Cook
patent: 4703738 (1987-11-01), Deminco
patent: 4763634 (1988-08-01), Morozumi
patent: 4951637 (1990-08-01), Cook
patent: 4961412 (1990-10-01), Furuyama
patent: 4995369 (1991-02-01), Cook

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