Fuel-vapor emission control system for an automotive engine

Details Fuel-vapor emission control system for an automotive engine Fuel-vapor emission control system for an automotive engine

1984-05-17

1985-07-09

Lazarus, Ronald H.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123518, F02M 3302

Patent

active

045275327

ABSTRACT:
A fuel-vapor emission control system has a canister having a vacuum operated purge control valve, communicated with a float chamber of a carburetor and a fuel tank for purging fuel-vapor. A vacuum chamber of the vacuum operated purge control valve is communicated with a port provided in the carburetor so as to apply manifold vacuum to the vacuum chamber at partial-throttle operation. Parallel purge lines are provided for communicating the canister with an intake manifold of the engine. A solenoid operated valve is provided in one of the purge lines for controlling the purging of the fuel-vapor. The solenoid operated valve is opened for the purging by a signal from a vehicle or engine speed sensor under such conditions that the engine does not stall.

REFERENCES:
patent: 4127097 (1978-11-01), Iakimoto
patent: 4326489 (1982-04-01), Heitert
patent: 4446838 (1984-05-01), Suzuki

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