Control device for continuously variable transmission
US9638318B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 17, 2014 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Oct 17, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6629
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There are provided a continuously variable transmission (CVT) in which a belt (7) is wound around a primary pulley (5) and a secondary pulley (6) to transmit power; a primary pulley rotational speed sensor (13) for detecting a rotational speed of the primary pulley (5); a vehicle stopped state determination means for determining whether a vehicle is in a stopped state; a belt slippage detection means for detecting belt slippage on the basis of a signal of the primary pulley rotational speed sensor (13); and a prohibition means for prohibiting detection of the belt slippage by the belt slippage detection means when a parking range or a neutral range is selected by a shift lever operation by a driver. In the vehicle stopped state during selection of the parking range or the neutral range, the rotational speed of the primary pulley (5) is not basically output, and the belt slippage does not occur. Thus, erroneous detection of the belt slippage can be avoided by prohibiting the detection of the belt slippage in this case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.