Saab Automobile Aktiebolag

Mecel Ab

Bengt Elgh

Per S Gillbrand

Hans Johansson

Thomas Meldert

Michael Georghiou

Magnus Glavmo

Christian Carlsson

Per Johansson

The invention provides an arrangement for detecting ionization in the combustion chamber of a combustion motor where the fuel self-ignites by means of compression, as well as associated measurement device and calibration devices. A measurement tip extends substantially down into a main combustion chamber, which provides access to the portion of the combustion chamber where combustion first starts. The measurement device has a simple construction with good thermal conductivity. Using the calibration device according to the invention, the performance of the measurement device can be optimized from the point of view of control in different combustion motors in which the characteristic ion stream signal for each type of motor can be correlated against pressure data from combustion and used to calibrate the motor. The arrangement, the measurement device, and the calibration device allow implementation of ion-stream measurement in combustion motors of the diesel type, in which the start of combustion, as well as very small amounts of injected fuel, may be detected without lag and with high accuracy.

Arrangement for detecting ionization in the combustion chamber of a diesel motor, including associated measurement and calibration devices

Operation of servo devices for driving a motor vehicle - control,

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Åmål, Sweden

Bengt Elgh