Air control device for internal combustion engine

Details Air control device for internal combustion engine Air control device for internal combustion engine

1990-04-25

1991-01-01

Fox, John C.

Valves and valve actuation

Rotary valves

Butterfly

384492, F16K 122

Patent

active

049812840

ABSTRACT:
In an air control device including a body, an air passage formed in the body, a throttle valve disposed in the air passage for controlling an air quantity flowing in the air passage, a throttle shaft for mounting the throttle valve and extending across the aiir passage, and a pair of first and second ball bearings mounted in the body for rotatably supporting the throttle shaft; a supporting structure of the throttle valve including a first shoulder formed in the body; a first stopper fixed to the body; an inner ring of the first ball bearing engaged by interference fit with the throttle shaft; an outer ring of the first ball bearing engaged by clearance fit with the body, the outer ring being fixedly sandwiched between the first shoulder and the first stopper under the condition where a thrust is applied to the outer ring in an axial direction of the throttle shaft; a second shoulder formed in the body; a second stopper engaged by interference fit with the body; an inner ring of the second ball bearing engaged by clearance fit with the throttle shaft; and an outer ring of the second ball bearing engaged by clearance fit with the body, the outer ring being fixedly sandwiched between the second shoulder and the second stopper. Further, the surface of the throttle shaft is treated by a low-temperature salt bath nitriding process, so that fretting wear between the throttle shaft and the inner ring of the bearing engaged by clearance fit with the throttle shaft.

REFERENCES:
patent: 4043623 (1977-08-01), Rauch et al.
patent: 4225200 (1980-09-01), Dougall
patent: 4693040 (1987-09-01), Teranuchi
patent: 4880207 (1989-11-01), Matsumato et al.
patent: 4919491 (1990-04-01), Heideman

Affiliated with

Also associated with

Rating

Air control device for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air control device for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air control device for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1992372