Patent · US Expired

Method and circuit arrangement for controlling the flow rate of a hydraulic pump

US5704766A · kind A · utility

13Cited by

5References

4Claims

0Family size

Assignee

ITT Automotive Europe GmbH · DE

Inventors

Helmut Fennel · Bad Soden, DE
Alexander Kolbe · Camburg, DE
Klaus Honus · Frankfurt am Main, DE

Key dates

Filing date	Aug 21, 1995
Grant date	Jan 6, 1998
Priority date	—
Expiry date	Aug 21, 2015

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B2207/044
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Method and circuit configuration for controlling the flow rate of an electromotively driven hydraulic pump which is activated by a variable pulse/pulse-break train for controlling the auxiliary pressure supply of a brake system including anti-lock control (ABS) and traction slip control by brake management (BASR). The generator voltage produced by the pump motor during times of pulse break is evaluated as a standard of the rotational speed of the pump. The nominal value of the pump speed is compared with the actual value of the pump speed in a control circuit, and the new correcting variable for the pump activation is derived from the difference.

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