Idle speed controller

Details Idle speed controller Idle speed controller

1995-11-06

1997-07-29

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123336, 123361, F02D 1110, F02D 4116

Patent

active

056513437

ABSTRACT:
A throttle body for use in the air intake system of an internal combustion engine having an idle speed control. The throttle body assembly (10) includes a throttle plate (18) mounted to a throttle shaft (16), which is, in turn, mounted to a throttle control lever (20). A bearing member (30) is coupled to the throttle control lever (20). A motor (32) is mounted relative to the throttle body and includes an idle control cam (36) mounted to the motor shaft (34) so that the bearing (30) rests on the cam (36). A circuit (40) actuates the motor (32). This arrangement provides a variable idle stop for the throttle plate (18) where the cam (36) is directly controlled by the motor (32). The motor size is minimized by providing an overdrive function that overdrives the motor (32) during transitional phases, to obtain fast response time and high resolution of idle control. Further, this idle stop does not interfere with the smooth operation of the accelerator cable (24) during engine operating conditions other than idle.

REFERENCES:
patent: 4367708 (1983-01-01), Nakamura et al.
patent: 4526060 (1985-07-01), Watanabe
patent: 4541378 (1985-09-01), Kitamura
patent: 4569321 (1986-02-01), Bonfiglioli et al.
patent: 4850318 (1989-07-01), Torigai et al.

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