Title:
OIL PRESSURE WAVE BUFFERING AND PRESSURE CHANGE LIMITING METHOD IN SUPPLY PIPE OF HYDRAULIC PUMP AND HYDRAULIC PUMP USED THEREIN
Document Type and Number:
Japanese Patent JPS60222570
Kind Code:
A
Abstract:
A method of damping hydraulic pressure waves and of removing peaks from pressure variations in the feed ducts of a hydraulic pump resulting from excess fluid returned with high kinetic energy to a feed chamber uses this kinetic energy directly to increase temporarily the volume of the feed chamber by a value lying in the range 10% to 30% of the maximum cylinder capacity of the hydraulic pump. The pump has a resiliently movable wall disposed in a feed chamber perpendicularly to the direction of a high kinetic energy jet of fluid from a passageway opening into the chamber. The wall is located on the axis of the passageway at a distance from the opening that is not more than 1.5 times the smallest diameter of the passageway. The invention also relates to a hydraulic pump for implementing the method. Applicable to fuel injection pumps in Diesel engines.
Inventors:
ARAN DOBUOO
Application Number:
JP6636185A
Publication Date:
November 07, 1985
Filing Date:
March 29, 1985
Export Citation:
Assignee:
MACH TERUMITSUKU SOC ET
International Classes:
F04B11/00; F02M55/00; F02M55/04; F02B3/06; (IPC1-7): F01K1/02; F04B11/00
Attorney, Agent or Firm:
Yoshio Kawaguchi