Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1990-03-08
1991-10-08
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
251 84, 123516, F02M 3302
Patent
active
050544551
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. A novel construction for the purge regulator, particularly the connection between the actuator and the valve, precludes the transmission of any significant bending moment from the movable wall of the actuator to the valve. The head of the valve is designed to also contribute to improved operation.
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Boller George L.
Miller Carl Stuart
Siemens-Bendix Automotive Electronics Limited
Solis Erick
Wells Russel C.
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