Method for estimating and controlling driveline torque in a continuously variable hydro-mechanical transmission
US9097342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2010 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Oct 28, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/6861
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The method of estimating and controlling driveline torque in a continuously variable hydro-mechanical transmission uses pressure data and other metrics of a hydrostatic power unit of the transmission in lieu of actual driveline torque data. A mechanical efficiency of the transmission is determined as a function of whether the power unit is operating in a power generation or regeneration mode, and the torque output of the power unit is estimated from that and other hydrostatic parameters. This is used to estimate a torque output of a planetary power unit of the transmission, and the torque on an output member of the driveline is then estimated using that value, and appropriate corrective action taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.