patent · US6378839
Motor-operated flow control valve and exhaust gas recirculation control valve for internal combustion engine
30 April 2002
Indexed reference — no copy held
This patent is cited by material in the archive, so it is indexed here by number, title and inventor. The archive holds no copy of its text.
Abstract
Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (9) is reciprocated with rotating motion of a motor (32), whereupon a valve head (2a) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (33) of the motor (32) is set to be higher than the secondary vibration frequency of rotation...
Provenance
- Collection
- Cited prior art
- Original PDF
- patentimages.storage.googleapis.com →
- Filed
- 2000-12-12
- Source
- Google Patents bibliographic record
- Granted
- 2002-04-30
- Inventors
- Youichi Watanabe; Yasuyuki Nakano; Masayuki Suganami; Kzunori Irifune; Hitachi Ltd; Hitachi Car Engineering Co Ltd