Fail-safe gear-shifting control system for an automatic transmission

Patent · Tue May 26 04:00:00 EDT 1987

OSTI ID:6364726

Shimaoka, S; Yamamoto, K

A-gear-shifting control system is described for an automatic transmission having a torque converter connected to an engine output shaft, a transmission gear mechanism connected to the output shaft of the torque converter, a fluid pressure type actuator means for actuating the transmission gear mechanism to shift, and an electromagnetic means for controlling the supply of pressurized fluid to the fluid pressure type actuator means. The gear-shifting control system comprises: A rotational speed detecting means for detecting the rotational speed of the output shaft or the input shaft of the torque converter; an engine load detecting means for detecting engine load; a vehicle speed detecting means for detecting the vehicle speed; and a main gear-shifting characteristic memory in which main gear-shifting characteristics are stored.

• Assignee: Mazda Motor Corp.
• Patent Number(s): US 4667541
• OSTI ID: 6364726
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENGINES
EQUIPMENT
FLUIDS
GEARS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
MACHINE PARTS
MAGNETS
MECHANICAL TRANSMISSIONS
MEMORY DEVICES
MOTION
ROTATION
SIGNALS
TORQUE
VEHICLES
VELOCITY
WORKING FLUIDS