Method for determining atmospheric air pressure in pressure-controlled fuel injection systems

US5020363A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Eberhard Schnaibel · Hemmingen, DE
• Erich Junginger · Stuttgart, DE
• Klaus Hirschmann · Leonberg, DE

Key dates

• Filing date: Dec 6, 1989
• Grant date: Jun 4, 1991
• Expiry date: Dec 6, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/704
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of determining the prevailing atmospheric air pressure in a pressure-controlled injection system wherein the intake manifold pressure (Ps), measured when a predetermined load condition of the engine has been detected, is multiplied by a predetermined, preferably speed-dependent factor (K) to provide a value representative of the atmospheric air pressure (Po).