System for cooling a starting clutch of a continuously variable

Details System for cooling a starting clutch of a continuously variable System for cooling a starting clutch of a continuously variable

1992-11-13

1994-05-24

Bui, Thuy M.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Fluid pressure actuator for adjustment of member

F16H 6100

Patent

active

053143850

ABSTRACT:
A clutch cooling system for cooling a clutch used in combination with a continuously variable transmission including a pressure controlled spool valve having a housing defining a chamber, a spool movably mounted by a spring within the chamber, and a notch defined by the housing such that as the leading edge of the spool aligns with the notch a variable orifice is formed; a pressure controller means for adjusting the pressure applied to the remote end of the spool such that as the pressure applied to the remote end is reduced the spring decompresses causing the spool to traverse the housing and further causing the leading edge of the spool to pass along the notch thereby increasing the size of the variable orifice; a slot located within the spool that allows for minimum cooling flow when the spool valve variable orifice is closed; a cooling fluid feed line and a clutch cooling line extending from the chamber such that cooling fluid can flow from the cooling fluid feed line, into the chamber, through the orifice and into the clutch cooling line; and a electronic clutch control system for regulating clutch slippage wherein during a given amount of clutch slippage a predetermined electrical signal is sent to the pressure controller resulting in a given pressure being applied to the remote end of the spool.

REFERENCES:
patent: 3951393 (1976-04-01), Smirl
patent: 4433594 (1984-02-01), Smirl
patent: 4458318 (1984-07-01), Smit et al.
patent: 4522086 (1985-06-01), Haley
patent: 4648496 (1987-03-01), Petzold et al.
patent: 4982822 (1991-01-01), Petzolf et al.
patent: 5006092 (1991-04-01), Neuman et al.
patent: 5060768 (1991-10-01), Yamashita et al.
patent: 5086671 (1992-02-01), Oshidari
patent: 5183439 (1993-02-01), Yumoto et al.

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