A sensor assembly 100 with a protective coating 108 and a method of applying the coating is disclosed. The sensor assembly 100 includes a sensor 102, a first conductive lead 104 extending from the sensor, a second conductive lead 106 extending from the sen...

Provided are a temperature sensor 15 for detecting a temperature surrounding an EGR valve 12, judging means (IC chip 16) for judging on the basis of the detected temperature from the temperature sensor 15 whether an inside of a gas passage in the EGR valve...

In the engine including an MPL-EGR system having an HPL-EGR mechanism 6 and an LPL-EGR mechanism 7, a pressure difference between upstream side pressure and downstream side pressure of a low pressure EGR cooler 73 provided in the LPL-EGR mechanism 7 is det...

An internal combustion engine exhaust emission control system has a module for conveying exhaust gas from an engine exhaust system to an engine intake system. A valve selectively restricts the flow path. A pressure sensing passage communicates a pressure s...

An improved test method for an EGR system (22, 24) reliably detects debilitating EGR system restrictions without significantly degrading combustion stability and exhaust emissions. The EGR valve test opening for diagnostic purposes is initialized at a rela...