Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1993-02-10
1995-05-16
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Idle speed control
123481, 12333919, 12333922, F02D 4116, F02D 4500
Patent
active
054151430
ABSTRACT:
An idle control system includes an engine speed determining unit, a unit for determining the number of operating cylinders, a valve stopping unit for stopping the operation of inlet and exhaust valves of some of the cylinders, an idle control parameter calculating unit, and an engine speed control unit. The idle control parameter calculating unit calculates at least a target idle speed and a target idle position as idle control parameters according to the data on the number of operating cylinders. The engine speed control unit controls an idle speed control valve so as to remove a deviation of an actual engine speed from the target engine speed, based on a target deviation compensating gain or a corrected target position obtained by a calculated position correcting unit. Thus, the idle control method performed by the idle control system allows the engine to operate stably even when the engine is switched to a partial operation from a full operation or vice versa and is subject to a sudden torque change during idling.
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Argenbright Tony M.
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
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