Engine idling rotational speed control device

Details Engine idling rotational speed control device Engine idling rotational speed control device

1982-08-11

1984-11-27

Lall, Parshotam S.

Internal-combustion engines

Engine speed regulator

Idle speed control

123586, 123585, F02M 300

Patent

active

044845537

ABSTRACT:
A stepping motor is driven such that a rotational speed of an engine falls within a range of a target rotational speed determined in accordance with at least an engine coolant temperature when a throttle valve is substantially fully closed, in order to control an opening area of an air flow rate control valve. In the control operation, a lower limit of the opening area of the control valve is set to prevent the opening area from being reduced beyond a predetermined area in order to prevent engine stall. A predetermined setting is stored in a predetermined area each time when a vehicle speed signal from a vehicle speed sensor is received and the predetermined setting is decremented under a predetermined condition. When the decremented setting reaches zero, a current lower limit is maintained.

REFERENCES:
patent: 4146000 (1979-03-01), Hattori et al.
patent: 4240145 (1980-12-01), Yano et al.
patent: 4289100 (1981-09-01), Kinugawa et al.
patent: 4344398 (1982-08-01), Ikeura
patent: 4344399 (1982-08-01), Matsumara et al.
patent: 4365599 (1982-12-01), Ikeura
patent: 4365601 (1982-12-01), Yamazoe et al.
patent: 4375208 (1983-03-01), Furuhashi et al.
patent: 4378767 (1983-04-01), Kobashi et al.
patent: 4389996 (1983-06-01), Yaegashi et al.
patent: 4392468 (1983-07-01), Kobashi et al.
patent: 4401073 (1983-08-01), Furuhashi

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