Control of power-on downshift in a vehicle with an oncoming binary clutch
US9020722B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Nov 22, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2043
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle includes a transmission having a plurality of clutches, including an oncoming binary clutch and an off-going clutch. The oncoming binary clutch is a binary device and the off-going clutch is a non-binary device. An internal combustion engine is operatively connected to the transmission and configured to generate an engine torque based on an input torque request. A controller is operatively connected to the transmission and has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for controlling a power-on downshift with the off-going clutch and the oncoming binary clutch. The controller is configured to generate a first pressure command at below a threshold pressure to at least partially pressurize the oncoming binary clutch and initiate a clutch slip for the off-going clutch. Among other steps, the controller is configured to determine if synchronization is met.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.