Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1979-04-30
1981-06-23
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Fuel injection system
123325, 123493, 123198F, F02D 500, F02D 1306
Patent
active
042743826
ABSTRACT:
The engine crankshaft rotational speed is detected to be compared with stepwise arranged threshold speeds so as to stepwise enable fuel injection valves of respective cylinders during deceleration of the engine. Accordingly, the number of enabled cylinders is increased in a stepwise manner from a fuel cut-off state as the engine rotational speed decreases to prevent engine stall, while occurrence of shocks upon reactivation of cylinders is avoided. The threshold speeds are controlled in accordance with the variation of engine load which may be increased upon operation of auxiliary power consuming units, such as an air conditioner the compressor of which is driven by the engine, for preventing undesirable vibrations of the engine during the stepwise reactivation of the cylinders.
REFERENCES:
patent: 3463130 (1969-08-01), Reichardt et al.
patent: 3727591 (1973-04-01), Suda
patent: 4064844 (1977-12-01), Matsumoto et al.
patent: 4080947 (1978-03-01), Iizuka
patent: 4129109 (1978-12-01), Matsumoto
patent: 4144864 (1979-03-01), Kato et al.
patent: 4173209 (1979-11-01), Jordan
Iizuka Haruhiko
Matsumoto Junichiro
Sugasawa Fukashi
Dolinar Andrew M.
Myhre Charles J.
Nissan Motor Company Limited
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