Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-04-09
1988-03-01
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
123478, 123339, F02B 300
Patent
active
047278447
ABSTRACT:
Disclosed is an apparatus for controlling at the time of idling the rotational speed of an engine having an injector for injecting fuel in proportion to the width of an input pulse. The control apparatus includes: a rotational speed sensor for cyclically detecting the rotational speed of the engine; an airflow meter for cyclically detecting the quantity of air being sucked into the engine; an idle switch for detecting the complete closing of a throttle valve; a judging means for judging that the engine is in the idling condition on the basis of the output of the idle switch and the output of the rotational speed sensor; and an operating means for cyclically outputting the injector a fuel injection pulse having a pulse width obtained by the following expression on the basis of the output of the rotational speed sensor and the output of the airflow meter when the judging means has judged that the engine is in the idling condition.
REFERENCES:
patent: 4479186 (1984-10-01), Takao
patent: 4508075 (1985-04-01), Takao
patent: 4604703 (1986-08-01), Hasegawa
patent: 4658782 (1987-04-01), Lefevre
Miyake Junji
Morita Kiyomi
Cox Ronald B.
Hitachi , Ltd.
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