发明名称 |
Throttle valve opening and closing device |
摘要 |
The invention is intended to simplify a default mechanism of a throttle valve opening and closing device for the purpose of improving mountability of the device to a vehicle. When a motor generate no driving forces, a throttle valve is held in a position ( 1 ) by a return spring. In this position, gaps are formed between the throttle valve and a wall surface of an intake passage. Spherical recesses are formed in parts of the wall surface of the intake passage. In a position ( 2 ) where the throttle valve is opposed to the spherical recesses, the gaps are minimized in an operating range of the throttle valve.
|
申请公布号 |
US7243635(B2) |
申请公布日期 |
2007.07.17 |
申请号 |
US20050108814 |
申请日期 |
2005.04.19 |
申请人 |
HITACHI, LTD. |
发明人 |
SOSHINO MASAHIKO;KOWATARI TAKEHIKO;KADOMUKAI YUZO;EJIRI YUKI;ONO KENJI;KAMIMURA YASUHIRO;ISOZAKI NORIHIRO;WAYAMA EISUKE;ANDOH HITOSHI;TAKEUCHI YUTAKA |
分类号 |
F02D9/08;F02D9/10;F02D9/02;F02D11/10;F02D41/06 |
主分类号 |
F02D9/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|