Title:
PRESSURE REDUCING VALVE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2018204583
Kind Code:
A
Abstract:
To properly reduce a collision sound of a valve body.SOLUTION: A fuel injection system comprises a common rail 12 for storing high-pressure fuel injected from a fuel injection valve 11, a pressure reducing valve 18 for reducing the pressure of fuel in the common rail 12, and a drive circuit 50 for making an electricity-carrying current flow to the pressure reducing valve 18. The pressure reducing valve 18 holds a valve body in a non-electricity carrying position being one of a valve-closed position and a valve-opened position by a spring force at non-electricity carrying, and moves the valve body to an electricity-carrying position being the other of the valve-closed position and the valve-opened position while withstanding the spring force accompanied by electricity-carrying. An ECU 30 controls the opening/closing of the pressure reducing valve 18. The ECU 30 comprises: an electricity-carrying control part for re-carrying electricity to the pressure reducing valve 18 in order to limit a moving speed of the valve body at the movement of the valve body by the spring force immediately after a finish of the electricity-carrying of the pressure reducing valve 18; a determination part for determining that the valve body arrives at the non-electricity carrying position after a start of the re-carrying of electricity by the electricity-carrying control part; and a change part for changing a form of the re-electricity carrying by the electricity-carrying control part on the basis of a determination result of the determination part.SELECTED DRAWING: Figure 1
Inventors:
TSUKADA TOMOJI
Application Number:
JP2017113666A
Publication Date:
December 27, 2018
Filing Date:
June 08, 2017
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M55/02
Attorney, Agent or Firm:
Tsuyoshi Yamada
Kyoko Hino
Hiroshi Matsuda
Yusuke Kita
Kyoko Hino
Hiroshi Matsuda
Yusuke Kita