Vapor purge control system

Details Vapor purge control system Vapor purge control system

1989-08-28

1991-10-29

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123516, F02M 3302

Patent

active

050606212

ABSTRACT:
A control system for engines equipped with both a fuel vapor recovery system and an air/fuel ratio feedback control system. The air/fuel ratio feedback control system regulates delivery of fuel in response to an exhaust gas oxygen sensor such that the mixture of air, fuel, and recovered fuel vapor approximates a desired air/fuel ratio. The fuel vapor recovery system includes two parallel solenoid valves which are phased controlled by a phase controller responsive to a measurement of inducted airflow such that total purge flow through both valves is proportional to inducted airflow.

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patent: 4700683 (1987-10-01), Uranishi
patent: 4705007 (1987-11-01), Plapp

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