Method and apparatus for controlling a continuously variable automatic transmission
US6497636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Dec 18, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0213
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a method and apparatus for controlling a driving engine/transmission unit having a continuously variable automatic transmission, the transmission output torque acting upon the driving wheels of a vehicle and the engine reaction torque retroacting upon the driving engine can be adjusted by way of a regulated transmission variable. For operating the control as both a torque and transmission ratio regulator, it is suggested to predefine a desired transmission output torque, and to determine the regulated transmission variable, the transmission output power, a transmission power loss, the power requirement of the driving engine (from the transmission output power and the transmission power loss), a desired engine torque and a desired rotational engine speed, a corrected desired engine torque and/or a corrected desired transmission output torque in conjunction with a change of the regulated transmission variable (torque regulator operation) and/or a desired transmission ratio and a desired engine torque with a change of the regulated transmission variable, in such a manner that a determined actual transmission ratio coincides with a calculated desired transmission ratio (transmission…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.