Patent · US Expired

Pressure gauge glow plug

US7032438B2 · kind B2 · utility

8Cited by

3References

6Claims

0Family size

Assignee

BERU Aktiengesellschaft · DE

Inventors

Stefan Heinzelmann · Lauffen am Neckar, DE
Frank Pechhold · Ludwigsburg, DE
Arno Marto · Weil der Stadt, DE

Key dates

Filing date	May 13, 2005
Grant date	Apr 25, 2006
Priority date	—
Expiry date	May 13, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF23Q2007/002
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

A pressure gauge glow plug for a diesel engine having a plug body, a heating element, and a pressure sensor, which is positioned under pretension between the heating element and the plug body in such a way that the pressure sensor experiences the pressure existing in the combustion chamber of the cylinder in which it is inserted. The heating element is positioned so that it may be slid in an axial direction in the plug body and transmits the pressure in the combustion chamber of the cylinder to the pressure sensor. The pressure sensor is positioned on a heating element support that is permanently bonded to the heating element in a cap that permanently bonded to the plug body. The heating element support and pressure sensor form a unit that has axial play in the interior of the cap.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.