FLOW RATE REGULATION VALVE, ROTATING BODY, AND BELT-TYPE STEPLESS TRANSMISSION

Title:

FLOW RATE REGULATION VALVE, ROTATING BODY, AND BELT-TYPE STEPLESS TRANSMISSION

Document Type and Number:

WIPO Patent Application WO/2007/116767

Kind Code:

A1

Abstract:

A flow rate regulation valve (70) provided at a primary pulley which is a rotating body. The flow rate regulation valve (70) has a first port (71), a second port (72), an operation fluid flow path (73) formed between the first port (71) and the second port (72) and allowing operation oil to flow through it, a check valve (74) placed in the operation fluid flow path (73) and permitting the flow in the flow path (73), from a second port-side flow path (73b) toward a first port-side flow path (73a), and a valve opening regulation section (guide member (75), spool (76), cylinder (77), and drive pressure chamber (79)) placed on the second port side of the check valve (74), forcibly opening the check valve (74) when the operation oil is discharged from the first port (71) to the second port (72), and increasing flow path resistance of the second port-side flow path (73b) such that the smaller the degree of opening of the check valve (74), the greater the flow path resistance. Excessive discharge of the operation fluid at the initial stage of valve opening can be restricted.

Inventors:

SHIOIRI HIROYUKI (JP)
KIMURA HIROAKI (JP)
FUJIMURA SHINYA (JP)

Application Number:

PCT/JP2007/056491

Publication Date:

October 18, 2007

Filing Date:

March 27, 2007

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TOYOTA MOTOR CO LTD (JP)
SHIOIRI HIROYUKI (JP)
KIMURA HIROAKI (JP)
FUJIMURA SHINYA (JP)

International Classes:

F16K15/18; F16H9/00; F16H61/00; F16H61/662

Foreign References:

JPS501275A	1975-01-08
JPH0320769U	1991-02-28
JPS5183029U	1976-07-03
JP2006064008A	2006-03-09

Other References: