System for controlling fuel supply in internal combustion engine

Details System for controlling fuel supply in internal combustion engine System for controlling fuel supply in internal combustion engine

1977-03-03

1979-07-03

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123103R, 123198DB, 123DIG11, F02D 3100, F02D 1108

Patent

active

041597010

ABSTRACT:
A system for controlling or interrupting the fuel supply in an internal combustion engine operating under a braking condition, in response to the vacuum level in its intake system. This system is equipped with an air pump driven by an output shaft of the engine, and a pressure responsive valve including two chambers partitioned by a diaphragm, a valve body coupled to the diaphragm and a valve seat therefor. A discharge pressure from the air pump is applied to one of the chambers, and a vacuum from the intake system, downstream of a throttle valve in the carburetor, is applied to the other of the chambers. This pressure responsive valve readily discriminates between the engine braking condition and the idling condition of the engine, by widening the sensible or detecting range between the maximum possible vacuum level in an intake pipe, upon idling and the minimum possible vacuum level in the intake pipe, upon engine braking. When the system detects engine braking condition, the fuel supply is interrupted so as to suppress the generation of harmful constituents in the exhaust gases.

REFERENCES:
patent: 3517653 (1970-06-01), Ariga et al.
patent: 3795237 (1974-03-01), Denton
patent: 3841281 (1974-10-01), Mick
patent: 3933952 (1976-01-01), Elmore
patent: 3977384 (1976-08-01), Jahn
patent: 4058978 (1977-11-01), Bockelmann et al.
patent: 4059081 (1977-11-01), Kayanuma

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