Transmission shift mechanism

Patent · Tue Jun 20 04:00:00 EDT 1989

OSTI ID:5556988

Smith, R R

This patent describes a mechanism for selecting the gear of an automatic transmission in a vehicle. The mechanism consists of: a pressure source; a gear selection valve having an inlet means for receiving fluid from the pressure source, first outlet ports, and second outlet ports; a manual override means for opening and blocking communication between the pressure source and the first ports and for simultaneously opening and blocking communication between the pressure source and the second outlet ports; a port selector means within the valve for controlling flow through the second ports, the port selector means being movable to a plurality of positions, each position permitting a selected second outlet port to open; a selector control mans for moving the port selector means from one position to another, the selector control means including a planetary gear set connected by an input shaft to the transmission and connected to a vehicle load by an output shaft, the planetary gear set having a ring gear whose angular position is a function of reaction torque imposed by the load on the output shaft, the selector control means further including an arm assembly connected between the ring gear and the port selector means so that the position of the port selector means is a function of the reaction torque on the output shaft.

• Assignee: NOV; NOV-89-076011; EDB-89-153157
• Patent Number(s): US 4840091
• OSTI ID: 5556988
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
AUTOMATION
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
GEARS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
TORQUE
VALVES