Apparatus for controlling the number of enabled cylinders of an

Details Apparatus for controlling the number of enabled cylinders of an Apparatus for controlling the number of enabled cylinders of an

1979-04-30

1981-07-07

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

123325, 123493, 123198F, F02D 1700

Patent

active

042768632

ABSTRACT:
Apparatus for controlling the number of enabled cylinders of an internal combustion engine during deceleration comprises a plurality of comparators responsive to a signal indicative of the engine rotational speed upon deceleration of the engine. The threshold voltages of the comparators are arranged stepwise so that each comparator produces an output signal when the engine speed falls below each threshold voltage. The output signals of the comparators are supplied to logic circuits to control a plurality of switches via which the fuel injection control pulse signal is respectively applied to fuel injection valves to increase in a stepwise fashion the number of enabled cylinders from the fuel cut-off state thereby preventing occurrence of impacts or shocks in the transition period of reactivation of the cylinders upon deceleration.

REFERENCES:
patent: 2875742 (1959-03-01), Dolza
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: 4172434 (1979-10-01), Coles
patent: 4175534 (1979-11-01), Jordan

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