The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2003
Filed:
Mar. 22, 2000
Bengt Elgh, Åmål, SE;
Michael Georghiou, Åmål, SE;
Christian Carlsson, Åmål, SE;
Thomas Meldert, Åmål, SE;
Magnus Glavmo, Luxembourg, SE;
Mecel AB, Åmål, SE;
Abstract
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.