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:
Feb. 25, 2014
Filed:
Mar. 09, 2011
Martin Sackmann, Benningen, DE;
Bernd Last, Reutlingen, DE;
Marc Rottner, Illingen, DE;
Hans Houben, Wurselen, DE;
Olaf Toedter, Walzbachtal, DE;
Martin Sackmann, Benningen, DE;
Bernd Last, Reutlingen, DE;
Marc Rottner, Illingen, DE;
Hans Houben, Wurselen, DE;
Olaf Toedter, Walzbachtal, DE;
Borgwarner Beru Systems GmbH, Ludwigsburg, DE;
Abstract
The invention relates to a method for controlling a glow plug to a target value of the surface temperature while the engine is running. An effective voltage is generated by pulse width modulation of a vehicle electrical system voltage. This effective voltage is applied to the glow plug. The electric resistance of the glow plug is measured and compared to a resistance value expected for the target value of the surface temperature. The effective voltage is varied as a function of the deviation of the measured value of the electric resistance from the expected value of the electric resistance. A pressure sensor of the glow plug is used to measure the combustion chamber pressure. The resistance value expected for the target value of the surface temperature is determined as a function of the combustion chamber pressure.