Hydraulic-assistance system for open-circuit motor vehicles
US10704685B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2016 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Aug 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2023/0825
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a hydraulic-assistance system for motor vehicles, comprising a primary motor (M) and two hydraulic machines (140; 240, 250) connected by a hydraulic circuit such that when a first hydraulic machine (140) operates as a pump, the second hydraulic machine (240, 250) operates as a motor. The invention is characterized in that the hydraulic circuit connecting the two machines (140; 240, 250) is an open circuit passing through a tank (300), the hydraulic machine (240, 250) operating as a motor is a declutchable machine, and the hydraulic machine (140) operating as a pump is a pump in which the variable displacement is controlled by a device comprising a proportional pressure limiter (470) placed between a drain line (143) and the discharge line of the hydraulic machine (140) operating as a pump, and enabling the assistance pressure to be set, and at least one collection nozzle (460) placed between the proportional pressure limiter (470) and the discharge line of the hydraulic machine (140), the setpoint pressure controlling the hydraulic machine (140) operating as a pump being collected between the pressure limiter (470) and the collection nozzle (460).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.