Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1989-11-08
1991-02-05
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Idle speed control
290 40C, F02M 306, H02P 904
Patent
active
049895656
ABSTRACT:
A rotational speed controller for an internal combustion engine of a vehicle has an air bypass passage which bypasses the throttle valve of the engine. A solenoid valve controls the air intake rate through the bypass passage. The output current of a generator which is driven by the engine is monitored by a current sensor. Based on the current which is sensed, an air intake adjuster calculates the change in the air intake rate through the bypass passage necessary to compensate for the load exerted on the engine by the generator so as to maintain a constant engine speed. The solenoid valve is controlled to change the air intake rate through the bypass passage by the amount calculated by the air intake adjuster. The change in the air intake rate can be calculated on the basis of the level of the generator current and/or the rate of change of the generator current. When a period sensor detects that the generator current is fluctuating with a prescribed amplitude and period, the air intake adjuster calculates the change in the air intake rate on the basis of the average value of the generator current. At other times, it calculates the change in the air intake rate using the instantaneous value of the generator current.
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Demizu Akira
Inoue Hitoshi
Shimomura Setsuhiro
Argenbright Tony M.
Mates Robert E.
Mitsubishi Denki & Kabushiki Kaisha
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