Title:
HYDRAULIC PRESSURE FEEDER FOR VEHICLE
Document Type and Number:
Japanese Patent JPS63251313
Kind Code:
A
Abstract:
PURPOSE:To improve fuel consumption, in a hydraulic pressure feeder for a hydraulic suspension, by employing a variable delivery hydraulic pump and operating the hydraulic pump such that delivery of pressure oil per single rotation is higher when a vehicle is running than when the vehicle is stopped. CONSTITUTION:Vehicle speed is detected through a vehicle speed sensor 25 and inputted to a delivery control circuit 26. The delivery control circuit 26 compares the vehicle speed with a setting speed, and if the former is lower, a solenoid direction changeover valve 6 is driven to feed delivery oil pressure from a second hydraulic pump 3b through a drain piping 8 to a tank 9. Consequently, the second hydraulic pump 3b is operated with no load, and thereby line pressure and flow of an output side hydraulic piping 5 are ensured by a first hydraulic pump 3a having high delivery per single rotation. When the vehicle speed exceeds the setting level, the solenoid direction changeover valve 6 is stopped and delivery oil pressure from the second hydraulic pump 3b is fed to the piping 5 so as to increase flow to be consumed by a pressure control valve 12. By such arrangement, fuel consumption can be improved.
Inventors:
FUKUNAGA YUKIO
TSUDA YOSHIKI
FUKUSHIMA NAOTO
AKATSU YOSUKE
NAMINO ATSUSHI
SATO MASAHARU
TSUDA YOSHIKI
FUKUSHIMA NAOTO
AKATSU YOSUKE
NAMINO ATSUSHI
SATO MASAHARU
Application Number:
JP8438787A
Publication Date:
October 18, 1988
Filing Date:
April 06, 1987
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
B60G17/015; B60G17/017; B60G17/04; B60G17/00; B60K25/04; F04B49/06; (IPC1-7): B60G17/00; B60K25/04
Attorney, Agent or Firm:
Tetsuya Mori