Method for measuring cylinder specific parameters in a combustion engine
Patent, 2005

The invention concerns a method to measure parameters in the combustion chamber of a piston engine that comprises an ignition system. An alternating voltage is applied across the secondary winding of the ignition coil and the value of the current that arises in a measurement circuit that co-operates with the secondary winding is measured. The value of the current depends on the resistance (R1) of the measurement circuit, on the inductance (L1) and resistance of the secondary winding, and on the impedance of the combustion chamber, i.e. on its capacitance (C1) and its resistance. For example, top dead centre, the pressure in the cylinder, analysis of the ionic current and change of the burning time can be determined by means of the method

measurement technique

engine diagnostic

ion current

combustion engine

Uppfinnare

Jörgen Bengtsson

SEM AB

Thomas Hammarström

Elnät och komponenter

10257820

Ämneskategorier

Annan maskinteknik

Geoteknik

Annan elektroteknik och elektronik

Styrkeområden

Transport

Energi

Materialvetenskap

Fundament

Grundläggande vetenskaper

Drivkrafter

Innovation och entreprenörskap

Mer information

Skapat

2023-03-29