Pressure measuring glow plug
AssigneeBorgWarner Ludwigsburg GmbH
InventorMichael Haussner
Life of this patent
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Abstract
Described is a pressure measuring glow plug with a housing, a glow pin, which projects out of the housing and can be displaced in its longitudinal direction relative to the housing against a restoring force. A sensor acquires the position of the glow pin or a pressure acting on the glow pin, and a center pole is arranged in the housing and electrically connected to the glow pin via a contact spring. This disclosure provides that the contact spring is a U-shaped, bent metal strip, which in a middle section has a reduced width, and broadens from the middle section toward its two ends.
Claims11
A pressure measuring glow plug, comprising:
- a housing;
- a glow pin projecting from the housing and displaceable in a longitudinal direction relative to the housing against a restoring force;
- a sensor for measuring the position of the glow pin relative to the housing or for measuring pressure acting on the glow pin;
- and
- a center pole arranged in the housing and electrically connected to the glow pin via a contact spring;
- wherein the contact spring is a U-shaped, bent metal strip, which in a middle section has a reduced width, and broadens from the middle section toward its two ends.
Dependencies are inferred from the claim text.