Air-fuel ratio control system for two-cycle engine

Details Air-fuel ratio control system for two-cycle engine Air-fuel ratio control system for two-cycle engine

1989-11-15

1990-10-02

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123 73A, 123486, 123488, 123492, F02D 4134

Patent

active

049600974

ABSTRACT:
An air-fuel ratio control system for a two-cycle engine is disclosed, which includes a cylinder, a crank case serving also as a pressure chamber, a fuel injection unit including an injector and a pump, an engine speed detecting element for detecting the engine speed, and a throttle opening degree detecting element for detecting the opening degree of a throttle valve. The control system is constructed of a crank case temperature detecting element for detecting the temperature of the crank case; a first setting element for setting an increment correction coefficient for increasing a fuel injection quantity, in accordance with the temperature of the crank case detected by the crank case temperature detecting element; a second setting element for setting a basic fuel injection quantity in response to the engine speed and throttle opening degree detected by the engine speed and throttle opening degree detecting element; and a third setting element for setting a fuel injection quantity by correcting the basic fuel injection quantity set by the second setting element in accordance with the increment correction coefficient set by the first setting element.

REFERENCES:
patent: 4305351 (1981-12-01), Staerzl
patent: 4446833 (1984-05-01), Matsushita et al.
patent: 4461260 (1984-07-01), Nonaka et al.
patent: 4777913 (1988-10-01), Staerzl et al.
patent: 4840148 (1989-06-01), Staerzl

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