Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1989-12-18
1991-02-26
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
F02M 2508
Patent
active
049953699
ABSTRACT:
The evaporative emission control system for an internal combustion engine purges the vapor collection canister to the throttle body through both a purge regulator controlled by the engine ECU and a variable orifice valve that is mechanically operated by the throttle mechanism. A throttle position sensor that supplies a throttle position signal to the ECU can be read by the ECU as also representing the degree of restriction being imposed by the variable orifice on the flow of vapor from the canister to the throttle body and the ECU can take this into account when setting the purge regulator.
REFERENCES:
patent: 3575152 (1971-04-01), Wentworth
patent: 4703738 (1987-11-01), DeMinco et al.
patent: 4763634 (1988-08-01), Morozumi
Argenbright Tony M.
Boller George L.
Siemens-Bendix Automotive Electronics Limited
Wells Russel C.
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