Slip control of a binary clutch assembly
US8886423B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2013 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Sep 20, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle includes an engine, an engine control module (ECM), and a transmission assembly. The transmission assembly includes a transmission control module (TCM), a stationary member, gear sets, an input member connected to the engine and one of the gear sets, and a binary clutch assembly. The binary clutch assembly has a freewheeling element and a binary device preventing rotation of the binary clutch assembly when applied, and allows the binary clutch assembly to freewheel when released. The TCM controls a slip speed differential of the binary clutch assembly when the vehicle is coasting in a forward gear state. The TCM determines a threshold maximum slip speed differential, calculates a required engine speed for achieving no more than the threshold maximum, and transmits the required engine speed to the ECM to maintain engine speed at or above the required engine speed. Doing so enables transmission state and direction change flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.