Method and apparatus to control operation of a hydraulic pump for an electro-mechanical transmission
US8170762B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 13, 2008 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for controlling a hydraulic flow within a powertrain comprising an electromechanical transmission mechanically-operatively coupled to an engine adapted to selectively transmit power to an output, wherein the transmission utilizes a hydraulic control system serving a number of hydraulic oil consuming functions includes monitoring minimum hydraulic pressure requirements for each of the functions, determining a requested hydraulic pressure based upon the monitoring minimum hydraulic pressure requirements and physical limits of the hydraulic control system including a maximum pressure, determining a desired flow utilizing a hydraulic control system flow model based upon the requested hydraulic pressure, and utilizing the desired flow to control an auxiliary hydraulic pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.