Valve assembly with cylinder having through holes

Patent metadata

Field	Value
Publication number	US-2016298533-A1
Application number	US-201314442235-A
Country	US
Kind code	A1
Filing date	Nov 4, 2013
Priority date	Nov 14, 2012
Publication date	Oct 13, 2016
Grant date	—

Abstract

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 ).

First claim

What is claimed is:

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.

2 . The turbocharger ( 10 ) of claim 1 wherein the cylinder ( 30 ) is a barrel that rotates within the tubular chamber ( 22 ) of the turbine housing ( 20 ) and the through hole ( 32 ) forms a passage for exhaust gas flow through the wastegate port ( 24 ).

3 . The turbocharger ( 10 ) of claim 1 wherein the cylinder ( 30 ) is solid except for the through hole ( 32 ) and has solid parallel end planes ( 34 ).

4 . The turbocharger ( 10 ) of claim 1 wherein the through hole ( 32 ) is transverse directly across a diameter of the cylinder ( 30 ).

5 . The turbocharger ( 10 ) of claim 1 wherein the actuator ( 36 ) operably controls rotation of the cylinder ( 30 ).

6 . The turbocharger ( 10 ) of claim 1 wherein the through hole ( 32 ) is transverse directly across a diameter of the cylinder ( 30 ) and wherein the actuator ( 136 ) operably controls linear reciprocation of the cylinder ( 30 ) so that the through hole ( 32 ) selectively blocks and unblocks the wastegate port ( 24 ).

7 . The turbocharger ( 10 ) of claim 1 wherein the cylinder ( 130 ) linearly reciprocates within the tubular chamber ( 22 ) of the turbine housing ( 20 ) as a piston valve and the through hole ( 132 ) is axial to accommodate a piston rod ( 40 ) of the actuator ( 136 ), the actuator ( 136 ) operably controlling linear reciprocation of the cylinder ( 130 ), and wherein a distal end ( 42 ) of the cylinder ( 130 ) selectively blocks the wastegate port ( 24 ).

8 . The turbocharger ( 10 ) of claim 1 wherein the cylinder ( 130 ) linearly reciprocates within the tubular chamber ( 22 ) and the through hole ( 32 ) is an external radial groove.

9 . A turbocharger ( 10 ) using exhaust gas flow to drive a turbine wheel ( 12 ) in a turbine housing ( 20 ) and a wastegate valve assembly ( 26 ) to control exhaust gas flow bypassing the turbine wheel ( 12 ), the turbocharger ( 10 ) comprising:
a tubular chamber ( 22 ) and a wastegate port ( 24 ) for exhaust gas flow bypassing the turbine wheel ( 12 ); a roller barrel valve ( 28 ) including a cylinder ( 30 ) having a through hole ( 32 ), the cylinder ( 30 ) rotatable within the tubular chamber ( 22 ) of the turbine housing ( 20 ) and the through hole ( 32 ) operably associated with the wastegate port ( 24 ) for selectively allowing exhaust gas flow through the wastegate port ( 24 ) via the through hole ( 32 ); and an actuator ( 36 ) operably controlling rotation of the cylinder ( 30 ), 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.

10 . The turbocharger ( 10 ) of claim 9 wherein the through hole ( 32 ) is transverse directly across a diameter of the cylinder ( 30 ).

11 . A turbocharger ( 10 ) using exhaust gas flow to drive a turbine wheel ( 12 ) in a turbine housing ( 20 ) and a wastegate valve assembly ( 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 piston valve ( 128 ) including a cylinder ( 130 ) that linearly reciprocates within the tubular chamber ( 22 ) of the turbine housing ( 20 ) with a distal end ( 42 ) of the cylinder ( 130 ) operably associated with the wastegate port ( 24 ) that selectively blocks and unblocks the wastegate port ( 24 ) thereby controlling the exhaust gas flow; and a linear actuator ( 136 ) operably controlling reciprocation of the cylinder ( 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.

Assignees

• Borgwarner Inc

Inventors

• Mawer James

Classifications

• F02B37/186 Primary

  Arrangements of actuators or linkage for bypass valves · CPC title

• F02B37/183

  Arrangements of bypass valves or actuators therefor · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title