Dual drive arrangement for the drive of a vehicle hydraulic pump and method of controlling the same
US9162571B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2010 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | May 20, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H3/724
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dual drive arrangement has three way power split device such as an epicyclic gearing system converting input rotation from a gearbox or from an electric motor into an output rotation driving a hydraulic pump. A method for controlling the dual drive arrangement driving a hydraulic pump includes setting a minimal flow value to the hydraulic pump, sensing the vehicle speed, processing the sensed vehicle speed where the processing includes comparing the sensed vehicle speed with a reference speed value to thereby determine whether the vehicle operates in a first operational mode I where the speed vehicle is too low to drive the hydraulic pump up to the minimal flow or in a second operational mode II where speed vehicle where the speed vehicle is sufficient to meet at least the minimal flow value, and controlling the operation of the epicyclic gear so that the electric source drives the hydraulic pump when the vehicle runs under the first operational mode I and at least the gearbox drives the hydraulic pump when the vehicle runs under the second operational mode II.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.