VALVE ASSEMBLY WITH CYLINDER HAVING THROUGH HOLES

摘要

A turbocharger (10) that uses exhaust gas flow to drive a turbine wheel (12) having a barrel or piston-type wastegate valve assembly (26,126) with a wastegate valve (28, 128) that controls exhaust gas flow bypassing the turbine wheel (12) to control turbine work. A cylinder (30, 130), which may have a through hole (32, 132), is moveable in a tubular chamber (22) and functionally operates with a wastegate port (24) in the turbine housing (20) for controlling exhaust gas flow. An actuator (36, 136) operably controls movement of the cylinder (30, 130).

主权项

1. A turbocharger (10) using exhaust gas flow to drive a turbine wheel (12) in a turbine housing (20) and a wastegate valve assembly (26, 126) to control exhaust gas flow bypassing the turbine wheel (12), the turbocharger (10) comprising:
a tubular chamber (22) and a wastegate port (24) in the turbine housing (20) for exhaust gas flow bypassing the turbine wheel (12); a valve (28, 128) including a cylinder (30, 130) having a through hole (32, 132), the cylinder (30, 130) moveable within the tubular chamber (22) of the turbine housing (20) and operably associated with the wastegate port (24) for selectively blocking and unblocking the wastegate port (24) thereby controlling the exhaust gas flow; and an actuator (36, 136) operably controlling movement of the cylinder (30, 130), wherein some exhaust gas flow bypasses the turbine wheel (12) to control turbine work in that the turbine wheel (12) rotates at a controlled speed.