Circuit arrangement for monitoring and controlling the pressure in the auxiliary pressure supply system of a hydraulic motor vehicle brake arrangement
US4699435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Dec 2, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
To monitor and control the pressure in the auxiliary pressure supply system of a hydraulic motor vehicle brake system, a circuit arrangement is employed which is provided with a door-contact switch (24) which closes when the driver's door of the motor car is opened and which at a pressure in the auxiliary pressure supply system (11-16) below the telltale threshold activates the hydraulic pump (11) irrespective of the activation of the ignition. Moreover, a holding circuit (25, 26, 30, D30) is provided through which, after closure of the driver's door, the hydraulic pump (11) continues to operate until the telltale pressure threshold or responding threshold is reached or exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.