Protection system for a pressure-charged internal combustion engine and method of operation

US5502966A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Stefan Unland · Schwieberdingen, DE
• Oskar Torno · Schwieberdingen, DE
• Werner Haeming · Neudenau, DE
• Ulrich Rothhaar · Milano, IT
• Iwan Surjadi · Leinfelden, DE
• Wolfgang Hilbert · Heubach, DE
• Robert Sloboda · Yokohama, JP
• Michael Baeuerle · Rutesheim, DE

Key dates

• Filing date: Nov 30, 1994
• Grant date: Apr 2, 1996
• Expiry date: Nov 30, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A protection system for a pressure-charged (supercharged) combustion engine. In normal operation, the pressure-charging is controlled and/or regulated to a specifiable desired setpoint value P Setpoint. For the case of over-boosting of the internal combustion engine, various protective measures are provided, which are used in dependence upon the extent of over-boosting. In the case of a first protective measure, the control and/or regulation of the pressure-charging is switched off, and a final controlling element, which influences the pressure-charging, is adjusted to a predeterminable position. In the case of a second protective measure, the fuel metering to individual cylinders is interrupted in accordance with a predetermined skip pattern. If it is not possible to achieve an adequate reduction in the pressure-charging by this means, the system switches successively to further skip patterns with a higher skip frequency.