Lock up control of a hydraulic torque converter type automatic transmission
A motor vehicle is described including an engine having an engine output shaft, a torque converter having an input member and an output member, the input member of the torque converter being connected with the engine output member to be driven thereby, lock-up means adapted for connecting the input and output members of the torque converter, the lock-up means having means for actuating the lock-up means into and out of engagement, speed detecting means for detecting rotating speed related to rotating speed of one of the input and output members of the torque converter and producing a speed signal, engine load detecting means for detecting engine load and producing a load signal, lock-up control means including means for defining first lock-up control lines as a function of the engine load and the rotating speed to define a lock-up zone as an area; means for comparing an engine operating condition as obtained by the speed signal and the load signal with the first and second lock-up lines, and means for producing a lock-up release signal which is applied to the lock-up means to disengage the lock-up means when the engine operating condition is out of the lock-up zone.
- Assignee:
- Mazda Motor Corp., Hiroshima
- Patent Number(s):
- US 4687083
- OSTI ID:
- 6098342
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
FASTENERS
HYDRAULIC CONTROL DEVICES
MACHINE PARTS
MEASURING INSTRUMENTS
MECHANICAL TRANSMISSIONS
MOTION
ROTATION
SHAFTS
SIGNALS
TORQUE
VEHICLES
VELOCIMETERS