Idle speed control system for automotive internal combustion eng

Details Idle speed control system for automotive internal combustion eng Idle speed control system for automotive internal combustion eng

1997-07-15

1998-06-16

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123 9011, 12333914, F02D 4116, F01L 904

Patent

active

057655286

ABSTRACT:
During idling of an internal combustion engine, when there is a difference between an actual engine speed and a target idle speed which is preset in accordance with an engine load, the opening and closing timings of an intake/exhaust valve of the engine is changed in accordance with the difference between the actual engine speed and the target idle speed to change an intake air flow sucked into the engine. Therefore, it is not required to provide any apparatus, such as an ISC valve, provided in conventional systems, and it is possible to quickly adjust the engine speed so as to be equal to the target idle speed.

REFERENCES:
patent: 4945870 (1990-08-01), Richeson
patent: 5115782 (1992-05-01), Klinke et al.

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