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HYDROSTATIC TRANSMISSION CLUTCH ENGAGEMENT USING A LOAD SHUTTLE VALVE

IP.com Disclosure Number: IPCOM000236477D
Publication Date: 2014-Apr-29

Publishing Venue

The IP.com Prior Art Database

Abstract

This concept is an improved design to actuate the final drive clutches used on hydraulically driven front wheels on motor graders through the use of load shuttle valves which select the highest pressure from the first and second inlets of the wheel-driving hydraulic motors and direct that pressure to the corresponding drive clutch. This essentially ensures that the highest pressure inlet is always directly connected to the valve outlet and consequently to the clutch pack creating a simple way to engage final drive clutches whenever the corresponding hydraulic motor is receiving pressurized fluid.