Title:
電磁弁駆動装置
Document Type and Number:
Japanese Patent JP6686858
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a solenoid valve driving device capable of reducing residual magnetic flux after solenoid valve driving as much as possible.SOLUTION: A solenoid valve driving device 2 includes a boosting circuit 3 that boosts from DC power supply VB, and a control circuit 20 turns on MOSFETs 8 and 9 at the initial stage of energization to energize a coil 1a of an electromagnetic valve 1 in the forward direction. After that, the control circuit 20 turns off the MOSFET 8 and intermittently turn on and off the MOSFET 11 to energize in the positive direction from the DC power source VB. After that, The MOSFETs 13 and 14 are turned on and reversely energized for a preset time Ton that has been set to the coil 1a in advance. Therefore, the residual magnetic flux generated by energizing the electromagnetic valve 1 in the positive direction can be demagnetized in a short time.SELECTED DRAWING: Figure 1
Inventors:
Kaoru Miyake
Application Number:
JP2016234927A
Publication Date:
April 22, 2020
Filing Date:
December 02, 2016
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H01F7/18; F02D41/20; F16K31/06; H01F13/00
Domestic Patent References:
| JP5299243A | ||||
| JP5175044A | ||||
| JP1182130A |
Foreign References:
| US20150377173 |
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office