Multiplexed pressure switch system for an electrically variable hybrid transmission
US7395837B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2005 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jan 17, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8326
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A powertrain has an electrically variable hybrid transmission having an electro-hydraulic control system, plurality of electrical power units, and a plurality of torque transmitting mechanisms selectively engageable by the electro-hydraulic control system to provide four forward speed ranges, a neutral condition, an electric low and high speed mode, an electrically variable low and high speed mode, and a hill hold mode. The electro-hydraulic control system includes a multiplexed pressure switch system. The multiplexed pressure switch system of the present invention allows position detection of six torque transmitting mechanism control valves through the use of only four pressure switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.