Process for determining fuel quantity

US5367462A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Klenk · Munich, DE
• Winfried Moser · Ludwigsburg, DE
• Kurt Ingrisch · Reutlingen, DE
• Christian Klinke · Pleidelsheim, DE

Key dates

• Filing date: Dec 14, 1993
• Grant date: Nov 22, 1994
• Expiry date: Dec 14, 2013

Classification

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

Abstract

In order to determine the fuel quantity to be fed into an internal combustion engine during each stroke of the engine, the air mass sucked into each cylinder for combustion during each intake stroke is determined based on an intake-pipe pressure. A current air mass is determined using a measured value for the intake-pipe pressure. Subsequently, during a period in which there is no change in an air intake cross-section for each cylinder, the air mass is determined using a projected intake-pipe pressure, and the fuel quantity to be fed to each cylinder during the current and subsequent intake strokes is determined based on the air mass determinations and a wall film model.