Electronically controllable brake booster

US6357837B1 · kind B1 · utility

Assignee

• Lucas Industries public limited company · GB

Inventors

• Christoph Linden · Vallendar, DE
• Gregor Godlewsky · Bendorf, DE
• Lorenz Maack · Eppelheim, DE

Key dates

• Filing date: Mar 31, 2000
• Grant date: Mar 19, 2002
• Expiry date: Mar 31, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/4854
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention relates to an electronically controllable brake booster with a vacuum chamber and a pressure chamber, which are separated from each other by a movable wall, a control valve arrangement which can be actuated by means of an electromagnetic actuation means, and by means of which a pressure difference between the pressure chamber and the vacuum chamber can be adjusted, with the control valve arrangement, as a function of a current flowing through the electromagnetic actuation means, assuming a holding position in which the current ranges between a higher value and a lower value without the control valve arrangement leaving the holding position, a first pressure changing position in which the current is higher than the higher value, and a second pressure changing position in which the current is lower than the low value, characterized in that upon a changeover of the control valve arrangement from the holding position into the first or the second pressure changing position, or upon a changeover from the first or the second pressure changing position into the holding position, the time period is determined which is required for the changeover, the determined time period is …