Abstract: A valve assembly controls the flow of boosted gas and naturally aspirated gas between an air inlet leading into an intercooler and an oil separator disposed in a head cover in a turbocharged motor vehicle engine. The valve assembly includes a housing defining a first channel through which the natural aspirated gas can pass and a second channel through which the boosted gas can pass. The housing encloses both a check valve and a PCV valve in the second channel. The check valve controls the flow of gas between the first and second channels during normal and boosted engine operation, respectively.

Abstract: Embodiments of an exhaust gas recirculation (EGR) mixing device include an air inlet port and an outlet port disposed at opposite ends of the mixing pipe, an exhaust feeder having a scroll mixing chamber and occupying a portion of the mixing pipe between the air inlet port and the outlet port. The exhaust feeder includes an exhaust feed splitter beam disposed within an open-ended exhaust inlet tube and the scroll mixing chamber, and can be configured to split an exhaust stream into a plurality of exhaust streams before entering the scroll mixing chamber.

Abstract: Embodiments of an exhaust gas recirculation (EGR) device comprise a mixing pipe having an air inlet port and an outlet port disposed at opposite ends of the mixing pipe, and an exhaust inlet port disposed at a region of the mixing pipe between the air inlet port and the outlet port, wherein the exhaust inlet port is configured to deliver exhaust to be mixed with air inside the mixing pipe. The exhaust gas recirculation (EGR) device further comprises a nozzle disposed internally within a region of the mixing pipe between the exhaust inlet ring and the outlet port such that the diffuser nozzle defines an outer mixing channel in the spacing between the diffuser nozzle and the mixing pipe region.

Abstract: A head cover assembly for covering a crankcase of an internal combustion engine includes a head cover, a removable cover, a valve, and an integral oil separator. The oil separator includes a labyrinth that defines a flow path that separates oil from crankcase gases passing therethrough. The valve includes a tubular body presenting a passage for which manifold vacuum may draw crankcase gas from the oil separator. The cover includes an aperture. The tubular body is disposed through the aperture such that the outer tube surface is spaced apart from the inner edge of the aperture to define a gap in which separated oil may drain back into the engine for recycling.