Abstract: A turbocharged motor vehicle engine system includes an engine having an intake manifold, an exhaust manifold, and a crankcase ventilation outlet. A turbocharger includes a turbine having an inlet fluidly connected to the exhaust manifold through an exhaust conduit and a turbo compressor having an outlet fluidly connected to the intake manifold through an inlet conduit. The turbo compressor also includes an inlet. A crankcase gas conditioning member includes an inlet section fluidly connected to the crankcase ventilation outlet and an outlet section fluidly connected to the turbo compressor inlet. An idle bypass conduit includes an inlet portion fluidly connected to the outlet section of the crankcase gas conditioning member and an outlet portion fluidly connected to the inlet conduit. The idle bypass conduit is configured and disposed to selectively bypass the turbo charger while the engine is operating at an idle.

Abstract: An oil squirter for an engine includes a piston-type valve having a damping vent configured to damp oscillations of the valve piston during opening and closing. The valve piston may be spring biased and the valve may opened by oil pressure exerted on the piston at or above a cracking pressure. The damping vent controls displacement of the valve piston by creating delta pressure in oil contained in a piston chamber in opposition to axial piston movement during opening and closing of the valve, to stabilize the axial movement of the piston thereby damping valve oscillation during valve opening and closing. The damping vent operates to increase cracking stability and eliminate cyclic contact of the valve piston and valve seat to prevent noise, wear, binding, and oil system pressure fluctuations due to squirter valve instability.

Abstract: An oil squirter for an engine includes a piston-type valve having a damping vent configured to damp oscillations of the valve piston during opening and closing. The valve piston may be spring biased and the valve may opened by oil pressure exerted on the piston at or above a cracking pressure. The damping vent controls displacement of the valve piston by creating delta pressure in oil contained in a piston chamber in opposition to axial piston movement during opening and closing of the valve, to stabilize the axial movement of the piston thereby damping valve oscillation during valve opening and closing. The damping vent operates to increase cracking stability and eliminate cyclic contact of the valve piston and valve seat to prevent noise, wear, binding, and oil system pressure fluctuations due to squirter valve instability.