THROTTLE VALVE ASSEMBLY FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a throttle valve assembly has little adhesion of solid body. SOLUTION: A throttle valve shaft 3 is rotatably supported by a main body 1. The throttle valve controls quantity of intake air flowing in an air intake passage fixed and supported by the throttle valve shaft 3. The throttle valve 4 is provided with a chamfer part 4A provided on an outer circumference end part of a throttle valve. The chamfer part 4A is provided in an upstream side of the outer circumference part of the throttle valve 4. Consequently, flow F2 and flow F1B are composed in vector and form flow F3 in a gap between an outer circumference side of the throttle valve 4 and the main body 1. Since the flow F3 makes angleθ3 with an inner wall surface of the main body 1 smaller than a case without chamfer part, a solid body is less liable to adhere. COPYRIGHT: (C)2005,JPO&NCIPI