Automatic mechanical transmission control

Patent · Tue Oct 06 00:00:00 EDT 1987

OSTI ID:5908896

Smyth, R R

An improved automatic transmission system is described for vehicles having a throttle-controlled engine, an operator actuated throttling control means and a transmission having a gear ratio combinations selectively engagable between a transmission input shaft and a transmission output shaft. The transmission input shaft is operatively connected to the engine. The transmission system includes an information processing unit having means for receiving input signals including (1) an input signal indicative of the position of the throttle controlling means, (2) an input signal indicative of the rotational speed of the engine, and (3) an input signal indicative of the speed of the vehicle, and (4) an input signal indicative of the direction of the last shift. The processing unit includes means for processing the input signals in accordance with a program to select a desirable gear ratio for a given combination of input signals and for generating output signals whereby the transmission system is operated in accordance with the program. The program has a first mode of operation and a second mode of operation, at least one of (a) the engine speeds at which the processing unit commands upshifts after a downshift being greater in the second than in the first mode of operation and (b) the engine speeds at which the processing unit commands downshifts after an upshift being less in the second mode than in the first mode of operation, the processing unit having means to set the program to the second mode of operation.

• Assignee: Eaton Corp., Cleveland, OH
• Patent Number(s): US 4698763
• OSTI ID: 5908896
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ANGULAR VELOCITY
AUTOMATION
COMPUTER CODES
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DATA PROCESSING
DATA TRANSMISSION SYSTEMS
ENGINES
FUNCTIONS
GEARS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MAN-MACHINE SYSTEMS
MECHANICAL TRANSMISSIONS
OPERATION
PROCESSING
SHAFTS
SIGNALS
VELOCITY