Multiplexed trim valve system for an electrically variable hybrid transmission
US7285066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2005 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Apr 21, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- 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 speed mode, an electrically variable low and high speed mode, and two electrical power off drive home modes. The electro-hydraulic control system of the present invention has a multiplexed trim system for an electrically variable hybrid transmission. The multiplexed trim system allows engagement control of four torque transmitting mechanism and individual control of fluid flow to effect cooling of two motor/generators by multiplexing three trim valves with two logic valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.