Apparatus for controlling the braking effect of a hydraulic retarder
US4440272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Aug 7, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2066/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic retarder, especially for an automotive vehicle, comprising a control valve which regulates the pressure of the hydraulic fluid supplied to the decelerator which can be connected to a heat exchanger for dissipating the thermal energy generated by the retardation of the vehicle. According to the invention a regulating valve is additionally provided for controlling the maximum pressure in dependence upon temperature and in response to a temperature sensor. The device thus limits the maximum retarder effect in accordance with the temperature of the hydraulic medium and hence the utility of the heat exchanger to dissipating the braking energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.