Device for regulation of a motor vehicle engine at idle speed

Details Device for regulation of a motor vehicle engine at idle speed Device for regulation of a motor vehicle engine at idle speed

1994-10-11

1996-12-24

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60284, 60285, F01N 320

Patent

active

055864325

ABSTRACT:
In a device for control of a motor vehicle engine operating at idle with two rows of cylinders, having a catalytic converter with an oxygen sensor associated with each, during operation of the engine at idle the injectors of one of the two rows of cylinders are alternately switched off. This switching of the injector shut-off from one row of cylinders to the other row of cylinders always takes place when the temperature of the catalytic converter associated with the row of cylinders that has just been shut-off falls below a predetermined temperature limit. Alternatively, in a device for control of a motor vehicle engine operating at idle with only one catalytic converter and only one oxygen sensor, during operation of the engine at idle the injectors are sequentially shut-off according to a predetermined program as a function of the engine firing order. This sequential injector shut-off is suspended at least for a predetermined period of time when the temperature of the catalytic converter falls below a predetermined temperature limit.

REFERENCES:
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patent: 4007590 (1977-02-01), Nagai
patent: 4103486 (1978-08-01), Hata
patent: 4134261 (1979-01-01), Iizuka et al.
Krafthand, "1st Zylinderabschaltung sinvoll?", Sep. 29, 1984, H. 18, pp. 1454-1456.
Technik Mot, "AVL-Leichtdiesel: Zukunftsmuskik", Nr. 26, p. 61, Dec. 26, 1980.
Automobile Revue, "Programmierbarer Hubkolbenmotor von Cadillac schon ab Modelljahr 1981" by Ken Zino, Nr. 35, p. 37, Aug. 21, 1980, Glen Rock, NY.
Kraftfahrzeugtechnik, "Kraftstoffsparender japanischer PKW-Antrieb" by R. Friebel, 1983, H. 11, p. 337.

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