Intake valve control system for internal combustion engine

Details Intake valve control system for internal combustion engine Intake valve control system for internal combustion engine

1996-09-20

1998-05-12

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Specific throttle valve structure

F02D 908

Patent

active

057493367

ABSTRACT:
An intake valve control apparatus for an internal combustion engine eliminates adverse effects due to accumulation of deposit materials downstream of the throttle valve to always ensure a smooth movement of the throttle valve. The apparatus has a body member forming an intake air passage and a throttle valve rotatably mounted therein. The throttle valve has a first outer circumference which rotates toward the upstream side thereof and a second outer circumference which rotates toward the downstream side thereof. A wall surface inside the body member opposite the first outer circumference of throttle valve is spherical, and wall surface of the body member opposite the second outer circumference of the throttle valve is cylindrical.

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patent: 4909211 (1990-03-01), Cook et al.
patent: 5315975 (1994-05-01), Hattori et al.
patent: 5374031 (1994-12-01), Semence et al.
patent: 5465696 (1995-11-01), Gmelin

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