Apparatus and method for adaptively shifting between ranges in a continuously variable transmission
US6402660B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/6853
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission assembly driven by an engine is disclosed. The transmission assembly includes a hydrostatic transmission having a variable displacement hydraulic pump and a hydraulic motor, a mechanical transmission coupled to the hydrostatic transmission for selecting a first gear range and a second gear range, and a controller for receiving operator inputs and generating a displacement command operable to control a displacement of the variable displacement pump. The controller determines the actual displacement. The controller determines a displacement shift level from the actual displacement. The controller executes a shift from the first gear range to the second gear range when the actual displacement reaches displacement shift level. A method of controlling a transmission assembly is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.