Abstract:
Various methods and systems are provided for diagnosing an exhaust gas recirculation valve based on crankcase pressure. In one example, a method comprises indicating a condition of a valve disposed in a first exhaust passage downstream from a cylinder exhaust valve based at least in part on a crankcase pressure.
Abstract:
Various methods and systems are provided for cooling exhaust system components. In one example, a system comprises heat shield surrounding at least a part of an engine exhaust passage valve positioned in an engine exhaust passage of an engine, and an air jet configured to direct compressed air into the heat shield. The heat shield contains the compressed air around an exterior of the at least the part of the engine exhaust passage valve.
Abstract:
Various methods and systems are provided for detecting particles generated from engine component degradation within an engine system. In one embodiment, a method for an engine comprises indicating engine degradation in response to a buildup of particles in a magnetic field, the magnetic field positioned in a flow of gas.