Patent ID: 7047936
Filing Date: 2006-05-23
Classification: F02D,Y10T

Abstract:
1. A throttle body comprising: a main body defining an intake air channel; a valve member rotatably mounted to the main body comprising; an outer peripheral surface formed between an upstream side surface and a downstream side surface of the valve member with respect to the valve member in the fully closed position; a contact surface formed on the outer peripheral surface; a valve seal surface formed on the inner wall of the intake air channel and having a circumferential length so as to sealingly contact the corresponding contact surface when the valve member is in the fully closed position; and wherein the intake air channel has a central axis; and wherein the valve seal surface and the corresponding contact surface of the valve member in the fully closed position are inclined by an angle relative to a first plane extending substantially perpendicular to the central axis of the intake air channel; and wherein the angle of inclination of the valve seal surface and the corresponding contact surface gradually decreases from a first point located on a circumference of the outer peripheral surface resulting from a line perpendicular to an intersection of the central axis and the rotation axis, defined as the most remote from the central axis of the intake air channel, to a second point located on the circumference of the outer peripheral surface that is proximate to the rotation axis.