Method and apparatus for controlling the idling operation of a s

Details Method and apparatus for controlling the idling operation of a s Method and apparatus for controlling the idling operation of a s

1979-05-31

1982-07-13

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123418, F02P 504

Patent

active

043388990

ABSTRACT:
The ignition timing of a spark-ignited internal combustion engine is controlled to have a stabilized idle speed which is approximately equal to a desired idle speed. In accordance with the invention the engine is supplied with a fuel-air mixture which has a high air ratio, exceeding the air ratio corresponding to maximum mean indicated pressure and hence maximum torque. The air ratio is in a range wherein an increased air ratio corresponds to decreased mean indicated pressure and consequently decreased torque. According to the invention, the ignition timing of the engine is controlled to linearly advance the timing from a nominal retarded condition in proposition to change in engine speed below the desired speed. The timing advance has the same ratio to engine speed change as the ratio of nominal ignition pulse spacing to the desired engine idle speed.

REFERENCES:
patent: 3554170 (1971-01-01), Schenk
patent: 3696798 (1972-10-01), Bishop et al.
patent: 3874350 (1975-04-01), Shiraishi
patent: 4048964 (1977-09-01), Kissel
patent: 4085714 (1978-04-01), Hattori et al.
patent: 4104998 (1978-08-01), Fenn
patent: 4111174 (1978-09-01), Fitzner et al.
patent: 4244336 (1981-01-01), Fitzner
Internal Combustion Engines, by E. F. Obert, .COPYRGT.1968 by International Textbook Co., pp. 372, 382, 383.

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