Automatic transmission system for vehicles

Patent · Tue Feb 24 00:00:00 EST 1987

OSTI ID:7082328

Takefuta, H

An automatic transmission system is described for vehicles having a friction clutch coupled to an internal combustion engine, a speed-change-gear type transmission coupled to the clutch, a first actuator for operating the clutch in response to an electric signal, and a second actuator for operating the transmission in response to an electric signal. A means is also included for producing at least one condition data indicative of the condition of operation of the vehicle and a control means responsive to at least the condition data for controlling the operation of the first and second actuators in order to carry out the gear change operation of the transmission. The control means includes: (1) a storing means for storing a first data representing a first gear change map showing gear change characteristics for obtaining economical running and a second data representing a second gear change map showing gear change characteristics for obtaining high-power-output running; (2) a signal generating means which has an operation lever movable along a predetermined gear shift pattern used for manual operation and generates a command signal indicative of the position of the operation lever on the gear shift pattern; and (3) means responsive to the command signal and the condition data for controlling the first and second actuators so as to carry out a gear change operation in one mode among a first control mode in which the transmission is shifted to the gear position corresponding to the position of the operation lever.

• Assignee: Diesel Kiki Co., Ltd.
• Patent Number(s): US 4645045
• OSTI ID: 7082328
• Resource Relation: Patent File Date: Filed date 20 Feb 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
MECHANICAL TRANSMISSIONS
COMPUTERIZED CONTROL SYSTEMS
VEHICLES
INTERNAL COMBUSTION ENGINES
ACTUATORS
DATA PROCESSING
FRICTION
GEARS
MEMORY DEVICES
SIGNALS
SPEED REGULATORS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
HEAT ENGINES
MACHINE PARTS
PROCESSING
330602* - Vehicle Design Factors- Engine-Transmission Matching
330100 - Internal Combustion Engines