Sensor assembly for easy removal

摘要

An improved sensor and sensor assembly is provided which permits the easy removal of the sensor from its mounting bore even in the presence of corrosive residue in the mounting bore. The sensor assembly includes an elongated sensor body having an annular tapered portion with a frusto-conical shape for positioning in a mounting bore having a complementary taper. As the sensor is removed from the mounting bore, the annular gap between the sensor and inner wall of the mounting bore will gradually increase at any point along the sensor body thereby increasingly separating any corrosive residue accumulated on the opposing surfaces. In addition, a seal assembly is provided which effectively vents gas pressure from the annular gap between the sensor and the mounting bore without damaging the seal and while ensuring the seal returns to its fully sealed position thereby preventing contaminants from entering the bore throughout engine operation.