Pressure reducing valve and continuously variable transmission with control arrangement using same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 3, 2000
Grant Date -
N/A
app pub date -
Dec 30, 1998
filing date -
Dec 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressure reducing valve and a continuously variable transmission comprising an output pressure feedback loop operatively connected to provide proportional control of an output pressure of a flow of fluid passing through the pressure reducing valve in response to an input signal applied to a pilot stage control valve of the pressure reducing valve from an external source. The pressure reducing valve includes a main stage two-way spool valve having a valve body and a valve spool movable within the valve body in response to an imbalance of forces on the valve spool. The valve body has a supply port for receiving pressurized fluid from a source of constant hydraulic pressure and a load port for communicating a load pressure and flow from the spool valve to an actuator of the secondary pulley of the transmission to maintain transmission belt tension while preventing or minimizing belt slippage. The open area of the load port is dependent on the position of the valve spool within the valve body.
First Claim
Other Claims data not available
Family