Multiple displacement motor driven power drive unit

Patent · Tue Dec 03 04:00:00 EST 1985

OSTI ID:5857129

Burandt, W A

A multiple displacement motor driven power drive unit having two separate hydraulic systems each with a variable displacement hydraulic motor having its output connected to a torque summing gear train. A control provides for operation of one or the other of the motors at full displacement while the other motor is at zero displacement and free-wheels. There is a manual mechanical control operation with both motors simultaneously set at one-half of full displacement and driving the torque summing gear train. The change in motor displacements to one-half full displacement accomplishes velocity summing within the hydraulics. The multiple displacement motor driven power drive unit accomplishes the power efficiency of a multiple motor driven power drive unit utilizing a speed summing gear train with fixed displacement motors, but without the complexities associated with the use of a speed summing gear train and brakes.

• Assignee: Sundstrand Corp.
• Patent Number(s): US 4555978
• OSTI ID: 5857129
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
CONTROL EQUIPMENT
DESIGN
EFFICIENCY
ENERGY EFFICIENCY
EQUIPMENT
GEARS
HYDRAULIC CONTROL DEVICES
HYDRAULIC EQUIPMENT
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MOTORS
PERFORMANCE
SERVOMECHANISMS
TORQUE