Title:
IDLE SPEED CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3932602
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the occurrence of defective operation of a valve element and lodging of a foreign matter by a method wherein a clearance is varied between during engine operation and during a stop of an engine.
SOLUTION: A drive shaft 7 on which a valve element 6 is attached is rotatably supported through ball bearings 11 and 12, and axially moved by an axial gap between ball bearings 11 and 12. During operation of an engine, a negative pressure in an intake sir piper is exerted on a closing plate 6c of the valve element 6. Since the component of force of a negative pressure in an intake pipe is higher than a suction forced exerted between the core 19 of an electromagnetic coil device and a permanent magnet 16, a drive shaft 7 is moved to the right togetherwith of the valve element 6, and a clearance between the closing plate 6c and the wall surface 9c of a valve chamber 9 is decreased. Since, during the stop of an engine, a negative pressure in an intake pipe is rendered ineffective, a drive shaft 7 is moved to the left togetherwith the valve element 6 through a suction force exerted between the core 19 and the permanent magnet 16 and a clearance between the closing plate 6c and the wall surface 9a of the valve chamber 9 is decreased.
Inventors:
Akira Furukawa
Mori Kazunori
Yukinobu Kajita
Mori Kazunori
Yukinobu Kajita
Application Number:
JP16409097A
Publication Date:
June 20, 2007
Filing Date:
June 20, 1997
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02M69/32; F16K3/22; F16K31/06; (IPC1-7): F02M69/32; F16K31/06; F16K31/06
Domestic Patent References:
| JP6058145U | ||||
| JP3181587B2 |
Attorney, Agent or Firm:
Kenji Ishiguro
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