Method and apparatus for controlling continuously variable transmission for vehicle
Abstract
A method is described of controlling a speed ratio of a continuously variable transmission for a vehicle for transmitting a rotary motion of an engine of the vehicle to drive wheels of the vehicle with a stepless speed change. The speed ratio of the transmission is regulated such that an actual speed of the engine coincides with a target engine speed. The method comprises: determining a first target speed of the engine based on a predetermined currently required output of the engine and according to a predetermined relation between the first target speed of the engine and the required output of the engine. The first target speed of the engine is normally used as the target engine speed to regulate the speed ratio of the transmission; detecting a running speed of the vehicle; and determining a second target speed of the engine based on a predetermined transmission efficiency of the transmission and on the first target speed of the engine. The second target speed of the engine is lower than the first target speed.
- Inventors:
- Publication Date:
- OSTI Identifier:
- 6765952
- Patent Number(s):
- US 4658360
- Assignee:
- Toyota Jidosha Kabushiki Kaisha, Toyota
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: Filed date 29 Aug 1984
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 33 ADVANCED PROPULSION SYSTEMS; MECHANICAL TRANSMISSIONS; COMPUTERIZED CONTROL SYSTEMS; ROTARY ENGINES; SPEED REGULATORS; VEHICLES; COMPUTER CALCULATIONS; VELOCITY; CONTROL EQUIPMENT; CONTROL SYSTEMS; ENGINES; EQUIPMENT; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; MACHINE PARTS; 330602* - Vehicle Design Factors- Engine-Transmission Matching; 330104 - Internal Combustion Engines- Rotary
Citation Formats
Osanai, A, Niwa, T, and Gono, T. Method and apparatus for controlling continuously variable transmission for vehicle. United States: N. p., 1987.
Web.
Osanai, A, Niwa, T, & Gono, T. Method and apparatus for controlling continuously variable transmission for vehicle. United States.
Osanai, A, Niwa, T, and Gono, T. 1987.
"Method and apparatus for controlling continuously variable transmission for vehicle". United States.
@article{osti_6765952,
title = {Method and apparatus for controlling continuously variable transmission for vehicle},
author = {Osanai, A and Niwa, T and Gono, T},
abstractNote = {A method is described of controlling a speed ratio of a continuously variable transmission for a vehicle for transmitting a rotary motion of an engine of the vehicle to drive wheels of the vehicle with a stepless speed change. The speed ratio of the transmission is regulated such that an actual speed of the engine coincides with a target engine speed. The method comprises: determining a first target speed of the engine based on a predetermined currently required output of the engine and according to a predetermined relation between the first target speed of the engine and the required output of the engine. The first target speed of the engine is normally used as the target engine speed to regulate the speed ratio of the transmission; detecting a running speed of the vehicle; and determining a second target speed of the engine based on a predetermined transmission efficiency of the transmission and on the first target speed of the engine. The second target speed of the engine is lower than the first target speed.},
doi = {},
url = {https://www.osti.gov/biblio/6765952},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 14 00:00:00 EDT 1987},
month = {Tue Apr 14 00:00:00 EDT 1987}
}