Title:
VALVE DEVICE
Document Type and Number:
Japanese Patent JP2015028335
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a valve device for shortening a time to fully closing a valve by suppressing the collision of a mechanical stopper when fully closing the valve.SOLUTION: During fully closing the valve, a control device performs energization control of an electric motor in a valve-closing direction until a detection opening reaches an energization stop opening θa set to be on the further valve-opening side than a fully-closing opening θ0. Then, it stops the energization of the electric motor when the detection opening reaches the energization stop opening θa, and returns the valve into the fully-closing opening θ0 with the energizing force of a return spring. The control device also sets a fully-closing target opening θb to be on the further valve-closing side than the energization stop opening θa. Thus, a time to reaching the energization stop opening θa can be shortened, and after reaching the energization stop opening θa, a time to approximating the fully-closing opening θ0 can also be shortened utilizing the inertia force of an electric actuator in the valve-closing direction. When the valve approximates the fully-closing opening θ0, the force of the return spring is reduced to suppress the abutment of the mechanical stopper.
Inventors:
SASAKI ICHIJI
SHIMANE OSAMU
SHIMANE OSAMU
Application Number:
JP2014076826A
Publication Date:
February 12, 2015
Filing Date:
April 03, 2014
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M25/07; F16K31/04
Domestic Patent References:
| JP2007285173A | 2007-11-01 | |||
| JP2006152824A | 2006-06-15 | |||
| JP2005291321A | 2005-10-20 | |||
| JP2007321658A | 2007-12-13 | |||
| JP2007032618A | 2007-02-08 | |||
| JP2004162665A | 2004-06-10 |
Attorney, Agent or Firm:
Kenji Ishiguro
Shinji Nagatani
Shinji Nagatani