Fuel vapor recovery control system

Details Fuel vapor recovery control system Fuel vapor recovery control system

1989-11-09

1991-10-08

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123533, F02M 3302

Patent

active

050544543

ABSTRACT:
A control system and method for an internal combustion engine and receiving inducted fuel vapors from a fuel vapor recovery system. An electronically actuated solenoid valve coupled to the fuel vapor recovery system regulates rate of vapor flow in response to the duty cycle of a desired rate of vapor flow command. The pressure differential across the valve is regulated to achieve substantially sonic vapor flow such that vapor flow is independent of engine manifold pressure fluctuations and linearly proportional to the duty cycle of the desired vapor flow command. An air/fuel ratio feedback control system is thereby able to maintain a desired air/fuel ratio during changes in inducted airflow.

REFERENCES:
patent: 4070828 (1978-01-01), Barres
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patent: 4206599 (1980-06-01), Sumiyoshi
patent: 4338905 (1982-07-01), Urich
patent: 4465050 (1984-08-01), Igashira
patent: 4519356 (1985-05-01), Sarich
patent: 4530210 (1985-07-01), Yamazaki
patent: 4641623 (1987-02-01), Hamburg
patent: 4715340 (1987-12-01), Cook et al.
patent: 4748959 (1988-06-01), Cook

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