Lock up control of a hydraulic torque converter type automatic transmission

Patent · Tue Aug 18 00:00:00 EDT 1987

OSTI ID:6098342

Sotoyama, K; Sumida, S; Kikuchi, T

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
• Resource Relation: Patent File Date: Filed date 22 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
MECHANICAL TRANSMISSIONS
HYDRAULIC CONTROL DEVICES
TORQUE
VEHICLES
ENGINES
CONTROL SYSTEMS
FASTENERS
ROTATION
SHAFTS
SIGNALS
VELOCIMETERS
CONTROL EQUIPMENT
EQUIPMENT
MACHINE PARTS
MEASURING INSTRUMENTS
MOTION
330602* - Vehicle Design Factors- Engine-Transmission Matching