Compressor of an exhaust-gas turbocharger

Patent metadata

Field	Value
Publication number	US-9528527-B2
Application number	US-201214115497-A
Country	US
Kind code	B2
Filing date	Apr 26, 2012
Priority date	May 10, 2011
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A compressor ( 1 ) of an exhaust-gas turbocharger (ATL), having a compressor wheel ( 2 ) and a compressor housing ( 3 ) which has a housing longitudinal axis (A). The compressor wheel ( 2 ) is arranged in the housing. An inlet duct ( 5 ) runs from a compressor inlet ( 4 ) to the compressor wheel ( 2 ). A recirculation duct ( 6 ) has a compressor-wheel-side inflow opening ( 7 ) and a compressor-inlet-side return flow opening ( 8 ). The inflow opening ( 7 ) and the return flow opening ( 8 ) can be opened and closed.

First claim

The invention claimed is:

1. A compressor ( 1 ) of an exhaust-gas turbocharger (ATL), having
a compressor wheel ( 2 ); and
a compressor housing ( 3 )
which has a housing longitudinal axis (A),
in which the compressor wheel ( 2 ) is arranged,
which has an inlet duct ( 5 ), said inlet duct running from a compressor inlet ( 4 ) to the compressor wheel ( 2 ) and having a hooded ported shroud recirculation duct ( 6 ) which has a compressor-wheel-side inflow opening ( 7 ) and a compressor-inlet-side return flow opening ( 8 ), and
means for opening and closing the return flow opening ( 8 ) while leaving the inflow opening ( 7 ) open,

wherein the recirculation duct ( 6 ) is delimited by an inner surface ( 14 ′) of an adjacent housing region ( 11 ′) of the compressor housing ( 3 ), an axially moveable sleeve ( 9 ) and an axially moveable slide ( 10 ) upstream of the axially moveable sleeve ( 9 ), and
wherein said return flow opening ( 8 ) is opened and closed by moving the axially moveable sleeve ( 9 ) relative to the slide ( 10 ) or by moving the axially moveable slide ( 10 ) relative to the sleeve ( 9 ).

2. A compressor ( 1 ) of an exhaust-gas turbocharger (ATL), having
a compressor wheel ( 2 ); and
a compressor housing ( 3 )
which has a housing longitudinal axis (A),
in which the compressor wheel ( 2 ) is arranged,
which has an inlet duct ( 5 ), said inlet duct running from a compressor inlet ( 4 ) to the compressor wheel ( 2 ) and having a hooded ported shroud recirculation duct ( 6 ) which has a compressor-wheel-side inflow opening ( 7 ) and a compressor-inlet-side return flow opening ( 8 ), and
means for opening and closing at least one of the inflow opening ( 7 ) and the return flow opening ( 8 ),

wherein the recirculation duct ( 6 ) is delimited by an axially moveable sleeve ( 9 ), an axially moveable slide ( 10 ) upstream of the axially moveable sleeve ( 9 ) and an inner surface ( 14 ′) of an adjacent housing region ( 11 ′) of the compressor housing ( 3 ).

3. The compressor as claimed in claim 2 , wherein the slide ( 10 ) has a rounded first return flow surface ( 11 ) which leads to the return flow opening ( 8 ).

4. The compressor as claimed in claim 3 , wherein the sleeve ( 9 ) has a rounded second return flow surface ( 12 ).

5. The compressor as claimed in claim 2 , wherein the housing region ( 11 ′) has a first inflow surface ( 13 ) which is inclined relative to the longitudinal axis (A) and which leads to the inflow opening ( 7 ).

6. The compressor as claimed in claim 5 , wherein the sleeve ( 9 ) has a second inflow surface ( 14 ), the inclination of which corresponds to the inclination of the first inflow surface ( 13 ).

7. The compressor as claimed in claim 2 , wherein the slide ( 10 ) can be actuated by means of an actuator.

8. The compressor as claimed in claim 2 , wherein the sleeve ( 9 ) can be actuated by means of an actuator.

9. The compressor as claimed in claim 2 , wherein the recirculation duct ( 6 ) runs parallel to the inflow duct ( 5 ).

10. The compressor as claimed in claim 2 , wherein the axially movable slide ( 10 ) is the hood of the hooded ported shroud when in the open position.

11. A compressor ( 1 ) of an exhaust-gas turbocharger (ATL), having
a compressor wheel ( 2 ); and
a compressor housing ( 3 )
which has a housing longitudinal axis (A),
in which the compressor wheel ( 2 ) is arranged,
which has an inlet duct ( 5 ), said inlet duct running from a compressor inlet ( 4 ) to the compressor wheel ( 2 ) and having a hooded ported shroud recirculation duct ( 6 ) which has a compressor-wheel-side inflow opening ( 7 ) and a compressor-inlet-side return flow opening ( 8 ), and
means for opening and closing at least one of the inflow opening ( 7 ) and the return flow opening ( 8 ),

wherein the recirculation duct ( 6 ) is delimited by an inner surface ( 14 ′) of an adjacent housing region ( 11 ′) of the compressor housing ( 3 ), an axially moveable sleeve ( 9 ) and an axially moveable slide ( 10 ) upstream of the axially moveable sleeve ( 9 ), and
wherein the slide ( 10 ) can be actuated by means of an actuator, the sleeve ( 9 ) can be actuated by means of an actuator, and wherein both the inflow opening ( 7 ) and the return flow opening ( 8 ) can be closed at the same time by actuation of both the slide ( 10 ) and the sleeve ( 9 ).

Assignees

• Sekularac Aleksandar
• Lischer Thomas
• Borgwarner Inc

Inventors

• Sekularac Aleksandar
• Lischer Thomas

Classifications

• F04D27/0238 Primary

  Details or means for fluid reinjection · CPC title

• F04D27/0215

  Arrangements therefor, e.g. bleed or by-pass valves · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F02B37/16

  by bypassing charging air · CPC title

• F04D29/4213

  suction ports · CPC title