Title:
HYDRAULIC FLUID SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP3717146
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce eccentric load of a pump rotating shaft generated by unbalance of pressure between both discharge ports when the supply quantity of high pressure hydraulic fluid is switched between the large and small values.
SOLUTION: A first and second suction ports P1, P2 of a vane pump 120 are connected to an oil tank 110, and in the case of setting the supply quantity of high pressure operating fluid to a large value, a spool 131 of a switching valve 130 is located in a first position on the left to communicate a first discharge port Q1 with a second discharge port Q2, and both discharge ports Q1, Q2 are communicated with a high pressure regulator valve 140, and also communicated with a low pressure regulator valve 150 through a throttle 190a. In the case of setting the supply quantity of the high pressure operating fluid to a small value, the spool 131 of the switching valve 130 is located in a second position on the right to communicate the second discharge port Q2 with the high pressure regulator valve 140, and communicate the first discharge port Q1 with the low pressure regulator valve 150.
Inventors:
Kei Nakamura
Application Number:
JP35845499A
Publication Date:
November 16, 2005
Filing Date:
December 17, 1999
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F04C2/344; F04C14/00; F04C14/24; F04C15/00; F04C15/06; (IPC1-7): F04C2/344; F04C15/04
Domestic Patent References:
| JP4357357A | ||||
| JP3213772A | ||||
| JP3213773A | ||||
| JP4277366A | ||||
| JP61125966A | ||||
| JP61119472A | ||||
| JP6239156A | ||||
| JP2001140771A |
Attorney, Agent or Firm:
Masago Onishi