CVT target engine speed control with unreliable output feedback
US10124811B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2016 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | May 27, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Y2400/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A machine may include an engine, a traction device, a continuously variable transmission (CVT) connecting the engine to the traction device, an operator input device outputting engine output command signals input by an operator, an engine speed sensor monitoring an engine output speed, and an electronic control module (ECM). The ECM controls a machine output of the machine by executing a transmission output control routine using transmission output parameters as feedback when transmission output parameter sensor signals are reliable. The ECM controls the machine output by executing a target engine speed control routine using an engine output speed sensor signals as feedback when the transmission output parameter sensor signals are nor reliable. In the target engine speed control routine, the ECM determines a CVT transmission ratio that will cause the CVT to apply a load to the engine that will cause the engine to run at the target engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.