EP0061734A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hydraulic control system for continuously variable V-belt transmission
Assignee: Nissan Motor Co Ltd
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Filing: 1982-03-25
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Granted: —
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Expires: 2002-03-25
Abstract
Abstract A hydraulic control system disclosed herein comprises a line pressure regulator valve which regulates the fluid supplied from a pump to provide a line pressure variable at least depending upon output torque of the engine. The line pressure is supplied to a shift control valve which regulates the fluid supply to and discharge from cylinder chambers of drive and driven pulleys.
Inventors
- 👤 Sigeaki Yamamuro
- 👤 Hiroyuki Hirano
- 👤 Yoshiro Morimoto
- 👤 Yoshikazu Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66254; F16H61/66263
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
A hydraulic control system for a continuously variable V-belt transmission having a V-belt running over -a drive and a driven pulley, each having cylinder chamber and two conical discs, one conical disc of the drive pulley being secured to a drive shaft adapted to be driven by the engine, one conical disc of the driven pulley being secured to a driven shaft, the other conical disc of the drive pulley being controllably movable in an axial direction of the drive shaft in response to the fluid pressure in the cylinder chamber thereof, the other conical disc of the driven pulley being controllably movable in an axial direction of the driven shaft in response to the fluid pressure in the cylinder chamber thereof, said hydraulic control system, comprising: pumping means for the hydraulic fluid; line pressure regulator valve means for regulating the fluid supplied by said pumping means to provide a line pressure variable at least depending upon output torque of the engine; and means connected to said line pressure regulator valve means for regulating fluid supply to and discharge from at least one of the cylinder chambers.
Claim 2
Dependent Claim
187 words
A hydraulic control system for a continuously variable V-belt transmission having a V-belt running over -a drive and a driven pulley, each having cylinder chamber and two conical discs, one conical disc of the drive pulley being secured to a drive shaft adapted to be driven by the engine, one conical disc of the driven pulley being secured to a driven shaft, the other conical disc of the drive pulley being controllably movable in an axial direction of the drive shaft in response to the fluid pressure in the cylinder chamber thereof, the other conical disc of the driven pulley being controllably movable in an axial direction of the driven shaft in response to the fluid pressure in the cylinder chamber thereof, said hydraulic control system, comprising: pumping means for the hydraulic fluid; line pressure regulator valve means for regulating the fluid supplied by said pumping means to provide a line pressure variable at least depending upon output torque of the engine; and means connected to said line pressure regulator valve means for regulating fluid supply to and discharge from at least one of the cylinder chambers.
Claim 3
Dependent Claim
40 words
An hydraulic control system as claimed in claim 1, wherein a pressure acting area of the cylinder chamber of the drive pulley is substantially equal in area to a pressure acting area of the cylinder chamber of the driven pulley.
Claim 4
Dependent Claim
49 words
A hydraulic control system as claimed in claim 1, wherein said line pressure regulator valve means is constructed and arranged such that it provides the line pressure variable depending not only to the output torque of the engine, but also the reduction ratio between the drive and driven pulleys.
Claim 5
Dependent Claim
40 words
A hydraulic pressure control system as claimed in claim 3, wherein a pressure acting area of the cylinder chamber of the drive pulley is larger in area than a pressure acting area of the cylinder chamber of the driven pulley.
References Cited (Backward Citations)
No citation records indexed.
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