Transmission for a hydraulic hybrid vehicle, comprising a planetary gear train linked to a pump by a speed reducer
US9995372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Nov 13, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission for a hydraulic hybrid motor vehicle includes a planetary gear train (30) capable of differential operation. The planetary gear train has a first element (32) linked to an internal combustion engine (34), a second element (40) linked to drive wheels (22) of the vehicle, and a third element (36) linked to a hydraulic pump (64). The transmission (1) further includes a hydraulic machine which drives the drive wheels (22) by way of a link between the third element (36) of the planetary gear train (30) and the hydraulic pump (64). This link includes a speed reducer (38, 60) that provides, when the whole of the planetary gear train is rotating at the same speed, a reduction in the speed of rotation of the pump relative to that of the internal combustion engine (34) that is greater than a value of approximately two.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.