Patent ID: 7207214

Claim:
An internal combustion engine glow plug comprising a heater shell, a heater enclosed within the shell and a glow plug body for supporting the heater and heater shell in an engine, an axial bore channel within the glow plug and at least one radial hole communicating at one end with the axial bore channel and so located as to communicate at the other end directly with an engine combustion chamber, a pressure sensor located in the glow plug and having a diaphragm thereon, said diaphragm being exposable to combustion gases entering the radial hole and axial bore channel, a heater sleeve attaching the heater shell to the glow plug body, said axial bore channel being formed in the heater and said radial hole being at least partially formed in the heater and passing through the heater sleeve, and a ceramic sleeve located between the heater and the heater sleeve.