Device for determining load in an internal combustion engine

US6167755A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Eckhart Damson · Gerlingen, DE
• Helmut Denz · Stuttgart, DE
• Martin Klenk · Munich, DE
• Werner Herden · Gerlingen, DE
• Winfried Moser · Ludwigsburg, DE
• Matthias Kuesell · Kornwestheim, DE

Key dates

• Filing date: Nov 7, 1994
• Grant date: Jan 2, 2001
• Expiry date: Nov 7, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/0402
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The device for determining load in internal combustion engines includes a pressure sensor connected with a combustion chamber of an internal combustion engine which produces an output signal depending on a combustion chamber pressure, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and a processor for determining a load of the engine from relative values of the output signal of the pressure sensor at predetermined crankshaft angles. The processor includes a device for determining the load from a pressure difference between combustion chamber pressures measured at two different predetermined crankshaft angles (x1, x2) or from two integrated pressure values. The integrated relative pressure values are obtained by integration of a pressure-proportional output signal of the pressure sensor between two different predetermined crankshaft angles.