Electronic transmission shift controller having a controlled alignment valve mechanism

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:5284501

Salmon, M E

This patent describes a motor vehicle multigear ratio transmission having a line pressure fluid source and a plurality of fluid operated drive establishing mechanisms selectively actuated according to a predetermined schedule to effect gear ration shifting, apparatus comprising; fluid supply means intermittently actuable to connect the line pressure source to a fluid supply passage to thereby affect the fluid pressure therein; fluid exhaust means intermittently actuable to exhaust fluid from a fluid exhaust passage to thereby affect the fluid pressure therein; fluid directing means for selectively actuating the drive establishing mechanisms to effect gear ratio shifting by selectively connecting the fluid supply and exhaust passages to the drive establishing mechanisms according to the predetermined schedule; shifting means effective when it is desired to shift transmission gear ratios to switch the valve means to the first position and to produce relative movement of the first and second members in the one direction if the desired shift is an upshift, and to switch the valve means to the second position and to produce relative movement of the first and second members in the opposite direction of the desired shift is a downshift.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4603603
• OSTI ID: 5284501
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
GEARS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
POSITIONING
PRESSURE CONTROL
STEADY-STATE CONDITIONS
TRANSIENTS
VALVES
VEHICLES
WORKING FLUIDS