Process and device for boost control

US5090204A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jorg Bonitz · Mühlacker, DE
• Siegfried Rohde · Schwieberdingen, DE
• Bernhard Miller · Weil der Stadt, DE
• Walter Kunzel · Ludwigsburg, DE

Key dates

• Filing date: Apr 30, 1990
• Grant date: Feb 25, 1992
• Expiry date: Apr 30, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An arrangement for boost control either has a pressure sensor and a differential-pressure sensor, the pressure sensor being connected to one of two suction paths of an internal combustion engine and the differential-pressure sensor being located between the two suction paths, or the device possesses a single pressure sensor 18 which is switched alternately to the first suction path 11.1 and to the second suction path 11.2 by means of a change-over valve 24. These arrangements and the associated methods make it possible to control to the same predetermined pressure in the two suction paths with a high degree of accuracy. This is because there is no possibility of a systematic error which, in previous arrangements and methods, arose from the fact that the pressures in the two suction paths were measured by separate pressure sensors. However, different pressure sensors in a simple version indicate different values at the same pressures.