Air-to-fuel ratio adjusting system for an internal combustion en

Details Air-to-fuel ratio adjusting system for an internal combustion en Air-to-fuel ratio adjusting system for an internal combustion en

1976-04-22

1978-02-07

Cox, Ronald B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123119EC, 60276, 60285, F02M 3300, F02M 700

Patent

active

040721370

ABSTRACT:
In an air-to-fuel ratio adjusting system for an internal combustion engine which comprises an additional air supply passage communicating with the carburetor of an internal combustion engine at the position downstream of its throttle valve, a control valve disposed in the additional air supply passage to vary the passage area thereof, and a percolation sensor for detecting percolation phenomenon of the fuel during idling operation of the engine is provided. When the occurrence of a percolation phenomenon is determined in accordance with the output signal of the percolation sensor, the control valve is controlled in response to the output signal of an air-to-fuel ratio sensor, whereas the control valve is held in a predetermined valve position when there is no occurrence of percolation phenomenon during idling operation of the engine.

REFERENCES:
patent: 3030027 (1962-04-01), Reppert
patent: 3759232 (1973-09-01), Wahl
patent: 3827237 (1974-08-01), Linder
patent: 3964457 (1976-06-01), Coscia

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