Patent · US Active

Pneumatic vehicle brake system and control method

US8708430B2 · kind B2 · utility

6Cited by

8References

14Claims

0Family size

Assignee

WABCO GmbH · DE

Inventors

Uwe Bensch · Hannover, DE
Jörg Helmer · Weingarten, DE
Bernd-Joachim Kiel · Wunstorf, DE
Hartmut Rosendahl · Hannover, DE

Key dates

Filing date	Jul 5, 2007
Grant date	Apr 29, 2014
Priority date	—
Expiry date	Sep 28, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T17/18
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A pneumatic vehicle brake system includes first and second groups of wheel brakes belonging, respectively, to first and second brake circuits having first and second compressed air storage tanks for providing first and second stored pressures. At least one first circuit brake cylinder is a combined spring-store/diaphragm cylinder with a spring store part for providing a parking brake and a diaphragm part for providing a service brake. If the first circuit fails, the spring store part is deaerated to engage the parking brake. A pressure sensor for measuring the first stored pressure is connected to a control unit that controls a modulator for aerating and deaerating the spring store part. The control unit generates a signal for an electrically actuatable modulator solenoid valve if the value measured by the sensor falls below a minimum value, such that the spring store part can be aerated and deaerated via the valve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.