Exhaust assembly, exhaust system, and power pack for a vehicle

Patent metadata

Field	Value
Publication number	US-10800490-B2
Application number	US-201815878002-A
Country	US
Kind code	B2
Filing date	Jan 23, 2018
Priority date	Jan 25, 2017
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

An exhaust assembly for a vehicle is disclosed, which includes a resonator including an inlet adapted for fluidly connecting to an exhaust manifold, and a closed end at an end of the resonator opposite the inlet; and a turbocharger passage extending from the resonator between the exhaust manifold and the closed end, the turbocharger passage defining an outlet. An exhaust system, a power pack, and the vehicle including the exhaust assembly are further disclosed.

First claim

What is claimed is:

1. An exhaust assembly, comprising:
a resonator including:
an inlet adapted for fluidly connecting to an exhaust manifold, the inlet having an inlet axis extending through a center of the inlet and normal to the inlet, and
a closed end at an end of the resonator opposite the inlet; and

a turbocharger passage extending from the resonator between the exhaust manifold and the closed end, the turbocharger passage being provided for fluidly connecting the exhaust assembly to a turbocharger such that at least a portion of exhaust gases flowing through the turbocharger passage drives the turbocharger, the turbocharger passage defining an outlet having an outlet axis extending through a center of the outlet and normal to the outlet, the turbocharger passage being disposed nearer to the inlet than to the closed end, and the outlet axis being disposed at an angle to the inlet axis greater than 90 degrees as measured from a center of the outlet to a center of the inlet.

2. The exhaust assembly of claim 1 , wherein the turbocharger passage is disposed at less than a third of a length of the resonator from the inlet, the length of the resonator being measured along a center line of the resonator from the inlet to the closed end.

3. The exhaust assembly of claim 1 , wherein the resonator is bent in a U-shape such that a central portion of the resonator is farther from the inlet than the closed end is from the inlet.

4. The exhaust assembly of claim 1 , wherein a central portion of the resonator has a larger diameter than either of the closed end and the inlet.

5. The exhaust assembly of claim 1 , wherein:
a diameter of the resonator increases as the resonator extends from the inlet toward a central portion of the resonator; and
the diameter of the resonator decreases as the resonator extends from the central portion toward the closed end.

6. The exhaust assembly of claim 1 , further comprising a flange about the outlet adapted for receiving a turbocharger disposed on the turbocharger passage.

7. The exhaust assembly of claim 1 , wherein the turbocharger passage extends from the resonator upward and away from the inlet.

8. An exhaust system, comprising:
an exhaust manifold adapted for connecting to an engine;
an exhaust assembly operatively connected to the exhaust manifold, the exhaust assembly including:
a resonator including:
an inlet connected to the exhaust manifold, the inlet having an inlet axis extending through a center of the inlet and normal to the inlet, and
a closed end at an end of the resonator opposite the inlet; and

a turbocharger passage extending from the resonator between the exhaust manifold and the closed end, the turbocharger passage defining an outlet having an outlet axis extending through a center of the outlet and normal to the outlet, the turbocharger passage being disposed nearer to the inlet than to the closed end, and the outlet axis being disposed at an angle to the inlet axis greater than 90 degrees as measured from a center of the outlet to a center of the inlet;

a turbocharger operatively connected to the turbocharger passage and fluidly connected to the outlet; and
a muffler fluidly connected to the turbocharger.

9. The exhaust system of claim 8 , wherein the turbocharger passage is disposed at less than a third of a length of the resonator from the inlet, the length of the resonator being measured along a center line of the resonator from the inlet to the closed end.

10. The exhaust system of claim 8 , wherein the resonator is bent in a U-shape such that a central portion of the resonator is farther from the inlet than the closed end is from the inlet.

11. The exhaust system of claim 8 , wherein a central portion of the resonator has a larger diameter than either of the closed end and the inlet.

12. The exhaust system of claim 8 , wherein the turbocharger passage extends from the resonator upward and away from the inlet.

13. A power pack comprising:
an engine; and
an exhaust system operatively connected to the engine, the exhaust system comprising:
an exhaust manifold connected to the engine;
an exhaust assembly operatively connected to the exhaust manifold, the exhaust assembly including:
a resonator including:
an inlet connected to the exhaust manifold, the inlet having an inlet axis extending through a center of the inlet and normal to the inlet, and
a closed end at an end of the resonator opposite the inlet; and

a turbocharger passage extending from the resonator between the exhaust manifold and the closed end, the turbocharger passage defining an outlet having an outlet axis extending through a center of the outlet and normal to the outlet, the turbocharger passage being disposed nearer to the inlet than to the closed end, and the outlet axis being disposed at an angle to the inlet axis greater than 90 degrees as measured from a center of the outlet to a center of the inlet;

a turbocharger operatively connected to the turbocharger passage and fluidly connected to the outlet; and
a muffler fluidly connected to the turbocharger.

14. A vehicle comprising:
a frame;
at least one of an endless drive track, a ski and a wheel operatively connected to the frame;
the power pack of claim 13 , the engine being connected to the frame and being operatively connected to the at least one ground engaging member; and
at least one seat connected to the frame.

15. The vehicle of claim 14 , wherein:
the resonator extends forward, to one of leftward and rightward, and then rearward from the manifold;
the turbocharger passage extends upward and forward from a rear portion of the resonator;
at least a portion of the turbocharger extends one of rightward and leftward of the turbocharger passage; and
the muffler is disposed at an other one of rightward and leftward of the turbocharger passage.

16. The power pack of claim 13 , wherein the turbocharger passage extends from the resonator upward and away from the inlet.

Assignees

• Brp Rotax Gmbh & Co Kg

Inventors

• Foxhall Nigel
• Kirchberger Roland
• Krimplstatter Stefan
• Oswald Roland
• Winkler Franz

Classifications

• F02B37/00 Primary

  Engines characterised by provision of pumps driven at least for part of the time by exhaust · CPC title

• F02M26/24

  with two or more coolers · CPC title

• F02B37/02

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

• F01N2260/06

  for improving exhaust evacuation or circulation, or reducing back-pressure · CPC title

• F02B2075/025

  two · CPC title