Borgwarner Ludwigsburg Gmbh

Borgwarner Beru Systems Gmbh

Karsten Volland

Jörg Stöckle

Andreas Klingebiel

Karen Gonzalez

Hans Houben

Bernd Last

Michael Haussner

Christian Pottiez

Frank Pechhold

Ralf Ehlert

Dirk Von Hacht

A method is described for determining the resistance temperature characteristic of a ceramic glow plug, wherein the glow plug is heated at a specified power, wherein before the heating it is first determined whether the glow plug is an aged glow plug, and then, if the glow plug has not been detected as an aged glow plug, the glow plug is heated at a first specified power and the resistance value thereby achieved is assigned to a temperature that is anticipated to be the final temperature when heating a factory-outlet glow plug at this first power, or if the glow plug has been detected as an aged glow plug, the glow plug is heated at a reduced power which is smaller than the first power, and the resistance value achieved thereby is assigned to the same temperature that is also anticipated when heating a factory-outlet glow plug at the first power.

Method for determining the resistance temperature characteristic of a ceramic glow plug

A method for detecting glow plug replacement or an aging glow plug. The glow plugs are heated and monitored. When a threshold value is reached for a first glow plug, a first value of a temperature-dependent variable is measured for all other glow plugs and is stored as reference values associated with the first glow plug. This process is repeated until reference values associated with each glow plug have been determined and stored for each glow plug. The process is repeated to determine a set of comparative values. The comparative values are compared with the reference values. A deviation of a comparative from a reference value of less than a specified tolerance value is considered an agreement. The inventive process concludes which of the glow plugs of the engine are unaltered and which have a resistance-temperature characteristic that has been altered to an extent indicating replacement, aging or a defect.

Method for the detection of a glow plug replacement

Glow plug, particularly for operation in a combustion engine, comprising at least one heating rod () and at least one body () and at least one annular gap () between the heating rod () and the body () and at least one chamber () primarily arranged between the heating rod () and the body ().

Glow plug having coking-optimized design

Growing community of inventors

Ludwigsburg, Germany

Karsten Volland