Hydraulic control for a transmission with high-low powershift and masterclutch

Patent · Tue Mar 03 04:00:00 EST 1987

OSTI ID:7082630

Horsch, J

A valve system is described for controlling two fluid activated clutches comprising: a valve body having a bore and a divider for dividing the bore into first and second chambers; a fluid inlet intersecting the bore for permitting pressurized fluid to enter the bore; a fluid outlet intersecting the bore for permitting pressurized fluid to exit the bore; first and second clutch lines intersecting the bore; a spring biased selector valve mounted within the first chamber at one end of the bore having a first position allowing fluid communication between the fluid inlet and the first clutch line and fluid communication between the fluid outlet and the second clutch line. The selector valve has a second position preventing fluid communication between the second clutch line and the fluid outlet, and a third position preventing fluid communication between the first clutch line and the fluid inlet. The selector valve has a fourth position allowing fluid communication between the fluid inlet and the second clutch line, and a fifth position allowing fluid communication between the second clutch line and the fluid inlet and between the first clutch line and the fluid outlet.

• Assignee: J.I. Case Co., Racine, WI
• Patent Number(s): US 4646895
• OSTI ID: 7082630
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL EQUIPMENT
DRAINAGE
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
INTAKE STRUCTURES
MACHINE PARTS
MECHANICAL STRUCTURES
MECHANICAL TRANSMISSIONS
POSITIONING
PRESSURIZING
SPRINGS
VALVES
VEHICLES
WORKING FLUIDS