Patent ID: 7174877
Filing Date: 2007-02-13
Classification: F02D,F16K

Abstract:
1. A throttle body used for a motor driving type throttle valve device, wherein a pair of projecting portions for opposing to an outer edge of said throttle valve are formed at a half of an inner wall and at an upper side of an intake air passage for a throttle shaft providing a throttle valve and at a half of an inner wall and at a lower side of an intake air passage for said throttle shaft, and formed at an upper and a lower side in a direction of an air passage with an interval; passage opening section area formed between an outer edge of said throttle valve and an inner wall of said intake passage at the positions of said projecting portions are a minimum value; a rotating start position of said throttle valve is formed near both of said projecting portions in rotating directions; an air flow rate increases slightly when said throttle valve rotates in both a direction toward said rotating start position and in a direction toward a rotating end position over said pair of projecting portions.