Exhaust system having remote multi-valve wastegate

Patent metadata

Field	Value
Publication number	US-2016010540-A1
Application number	US-201414327083-A
Country	US
Kind code	A1
Filing date	Jul 9, 2014
Priority date	Jul 9, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A wastegate is disclosed for use with a turbocharger in an exhaust system. The wastegate may have a housing at least partially defining an elongated inlet passage, and an elongated outlet passage arranged in parallel orientation relative to the elongated inlet passage. The wastegate may also have a first valve opening connecting the elongated inlet and outlet passages, and a first valve member disposed in the first valve opening and configured to move in a direction substantially orthogonal to a length direction of the elongated inlet and outlet passages. The wastegate may additionally have a second valve opening connecting the elongated inlet and outlet passages, and a second valve member disposed in the second valve opening.

First claim

What is claimed is:

1 . A wastegate for use with a turbocharger, comprising:
a housing at least partially defining an elongated inlet passage, and an elongated outlet passage arranged in parallel orientation relative to the elongated inlet passage; a first valve opening connecting the elongated inlet and outlet passages; a first valve member disposed in the first valve opening and configured to move in a direction substantially orthogonal to a length direction of the elongated inlet and outlet passages; a second valve opening connecting the elongated inlet and outlet passages; and a second valve member disposed in the second valve opening.

2 . The wastegate of claim 1 , wherein each of the first and second valve members are poppet type valves.

3 . The wastegate of claim 2 , further including a valve seat at each of the first and second valve openings and configured to be engaged by the first and second valve members.

4 . The wastegate of claim 3 , further including:
a first pneumatic actuator configured to move the first valve member; and a second pneumatic actuator configured to move the second valve member.

5 . The wastegate of claim 4 , wherein:
the first and second pneumatic actuators are configured to move the first and second valve members away from the valve seats at the first and second openings; and the first and second valve members are spring-biased toward the valve seats at the first and second openings.

6 . The wastegate of claim 1 , wherein each of the elongated inlet and outlet passages includes an open end and a closed end, the first and second openings being disposed between the open and closed ends.

7 . The wastegate of claim 6 , further including a common flange located at the open ends of the elongated inlet and outlet passages, the common flange configured to accommodate connection to exhaust passages associated with the turbocharger.

8 . The wastegate of claim 7 , further including mounting features located at the open and closed ends of the elongated inlet and outlet passages.

9 . The wastegate of claim 8 , wherein the mounting features include bosses.

10 . The wastegate of claim 7 , further including actuator mounts protruding from a wall of the elongated outlet passage.

11 . The wastegate of claim 10 , wherein the actuator mounts each include an engagement face that is oriented generally perpendicular to the common flange.

12 . The wastegate of claim 10 , wherein the first and second valve members pass completely through the elongated outlet passage to close off the first and second valve openings

13 . A wastegate, comprising:
a housing at least partially defining an elongated inlet passage having an open end and a closed end, and an elongated outlet passage arranged in parallel orientation relative to the elongated inlet passage and having an open end and a closed end; a first valve opening connecting the elongated inlet and outlet passages; a first valve seat located at the first valve opening; a first poppet valve disposed in the first valve opening and biased to engage the first valve seat; a second valve opening connecting the elongated inlet and outlet passages; a second valve seat located at the second valve opening; a second poppet valve biased to engage the second valve seat; a first pneumatic actuator configured to move the first poppet valve away from the first valve seat; and a second pneumatic actuator configured to move the second poppet valve away from the second valve seat.

14 . The wastegate of claim 13 , further including actuator mounts protruding from a wall of the elongated outlet passage, wherein the first and second poppet valves pass completely through the elongated outlet passage to engage the first and second valve seats.

1 . 5 , An exhaust system for an engine, comprising:
an exhaust manifold configured to receive exhaust from the engine; an exhaust stack configured to direct exhaust to the atmosphere; a turbocharger fluidly connected between the exhaust manifold and the exhaust stack; and a wastegate configured to selectively direct exhaust gases from the exhaust manifold to bypass the turbocharger and flow into the exhaust stack, the wastegate including:
a housing at least partially defining an inlet passage having an open end in fluid communication with the exhaust manifold and a closed end, and an outlet passage having an open end in fluid communication with the exhaust stack and a closed end;
a first valve opening connecting the inlet and outlet passages;
a first poppet valve disposed in the first valve opening;
a second valve opening connecting the inlet and outlet passages; and
a second poppet valve disposed in the second valve opening,
wherein the first and second poppet valves pass completely through the outlet passage to dose off the first and second valve openings.

16 . The exhaust system of claim 15 , wherein the wastegate further includes a valve seat at each of the first and second valve openings and configured to be engaged by the first and second poppet valves.

17 . The exhaust system of claim 15 , further including:
a first pneumatic actuator mounted to a wall of the outlet passage and configured to move the first poppet valve; and a second pneumatic actuator mounted to the wall of the outlet passage and configured to move the second poppet valve.

18 . The exhaust system of claim 17 , wherein:
the first and second pneumatic actuators are configured to move the first and second poppet valves away from the valve seats at the first and second openings; and the first and second poppet valves are spring-biased toward the valve seats at the first and second openings.

19 . The exhaust system of claim 15 , further including:
a common flange located at the open ends of the inlet and outlet passages, the common flange configured to accommodate connection to the exhaust manifold and the exhaust stack; a plurality of bosses located at the open and closed ends of the inlet and outlet passages and configured to accommodate mounting of the housing remotely from the turbocharger; and a plurality of actuator mounts protruding from a wall of the outlet passage and configured to receive the first and second pneumatic actuators.

20 . The exhaust system of claim 19 , wherein:
the plurality of actuator mounts each include an engagement face that is oriented generally perpendicular to the common flange; and the plurality of bosses each include a central axis that is oriented generally perpendicular to the common flange and to the engagement faces of the plurality of actuator mounts.

Assignees

• Electro Motive Diesel Inc

Inventors

• Norris Nicholas Denman

Classifications

• F02B37/186 Primary

  Arrangements of actuators or linkage for bypass valves · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B37/183

  Arrangements of bypass valves or actuators therefor · CPC title

• F02B37/02

  Gas passages between engine outlet and pump drive, e.g. reservoirs · CPC title