Process for determining the combustion air mass in the cylinders of an internal combustion engine

US5140850A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Siegfried Ellmann · Aschheim, DE
• Manfred Wier · Wenzenbach, DE

Key dates

• Filing date: Dec 2, 1991
• Grant date: Aug 25, 1992
• Expiry date: Dec 2, 2011

Classification

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

Abstract

A process for determining an available combustion air mass for a certain combustion in one or more cylinders of an internal combustion engine, includes continuously measuring an aspirated air mass through air mass measurement in an intake tube, and correcting the measured air mass so that it corresponds to a combustion air mass. A pressure in each cylinder is measured through a combustion chamber pressure measurement. A combustion air mass is determined for each cylinder from a pressure course during a compression stroke. Any difference between the combustion air masses ascertained through the air mass measurement and through the combustion chamber pressure measurement is compensated for by adaptation of the correction.