Malfunctional detecting apparatus for an assist air control syst

Details Malfunctional detecting apparatus for an assist air control syst Malfunctional detecting apparatus for an assist air control syst

1994-06-07

1996-01-30

Kamen, Noah P.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123479, F02B 2300

Patent

active

054873720

ABSTRACT:
The invention provides a malfunctional detecting apparatus for an assist air control system for internal combustion engines, which is capable of detecting malfunction such as the deterioration of the response of air control valve. A fuel injection valve is provided at downstream side of a throttle valve in an intake passage, and assist air passage is introduced into an injection port of the fuel injection valve. The assist air passage is open or closed by an air control valve which is operated in synchronism with the fuel injection valve. The assist air passage pressure sensor for detecting assist air pressure is provided in the assist air passage. The malfunction of the air control valve is judged based on the assist air pressure immediately after the air control valve is operated.

REFERENCES:
patent: 4875456 (1989-10-01), Tomisawa

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