Method and a device for measuring the air/fuel ratio of an internal combustion engine

US4953390A · kind A · utility

Assignee

• Avl Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H. Prof.Dr.Dr.h.c. Hans List · AT

Inventors

• Peter W. Krempl · Leibnitz, AT
• Wolfgang Schindler · Graz, AT
• Erich Schiefer · Graz, AT

Key dates

• Filing date: May 15, 1989
• Grant date: Sep 4, 1990
• Expiry date: May 15, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/128
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and device for delay-free measurement of the air/fuel ratio of combustion systems, especially internal combustion engines, by measuring individual components of the fuel, the ambient air used for fuel combustion, and the exhaust gas, wherein the water vapor concentrations of the exhaust gas and, preferably, the ambient air or the gas supplied for fuel combustion are measured, and wherein the air/fuel ratio are computed by the obtained values and data on fuel composition.