Exhaust gas system for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9267418-B2
Application number	US-201314390074-A
Country	US
Kind code	B2
Filing date	Apr 4, 2013
Priority date	Apr 5, 2012
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

An exhaust gas system for an internal combustion engine includes at least one first and one second exhaust gas connection interface for fluidically separated discharge of exhaust gas arising during a combustion process from a combustion chamber of the internal combustion engine, and one at least dual-pipe exhaust gas turbocharger having at least one first and one second supply connection interface for fluidically separated supply of the exhaust gases arising during the combustion process, wherein a first connecting channel is designed for fluidic connection of the first exhaust gas connection interface to the first supply connection interface, and a second connecting channel is designed for fluidic connection of the second exhaust gas connection interface to the second supply connection interface. At least one of the connecting channels is designed to be at least partially closable by a closure element.

First claim

The invention claimed is:

1. An exhaust gas system for an internal combustion engine, comprising
at least one first and one second exhaust gas connection interface for fluidically separated discharge of exhaust gas arising during a combustion process from a combustion chamber of the internal combustion engine, and
one at least dual-pipe exhaust gas turbocharger having at least one first and one second supply connection interface for fluidically separated supply of the exhaust gases arising during the combustion process,
wherein a first connecting channel is designed for fluidic connection of the first exhaust gas connection interface to the first supply connection interface, and a second connecting channel is designed for fluidic connection of the second exhaust gas connection interface to the second supply connection interface,
wherein at least one of the connecting channels is designed to be at least partially closable by via a closure element, and
wherein with a quantity of n combustion chambers, at least 2*n connecting channels are provided.

2. The exhaust gas system for an internal combustion engine according to claim 1 , wherein with a quantity of m connecting channels per combustion chamber, at least m−1 and a maximum of m closure elements are provided.

3. The exhaust gas system for an internal combustion engine according to claim 1 , wherein with several combustion chambers, respectively precisely one closure element of one combustion chamber is constructed so as to be actuatable together with respectively precisely one closure element of the other combustion chambers.

4. The exhaust gas system for an internal combustion engine according to claim 1 , wherein the closure element is constructed so as to be adjustable as a function of a rotation speed of the internal combustion engine.

5. The exhaust gas system for an internal combustion engine according to claim 1 , wherein the closure element, viewed in the extent direction of the connecting channel is arranged nearer to the exhaust gas connection interface than to the supply connection interface.

6. The exhaust gas system for an internal combustion engine according to claim 1 , wherein a through-flow cross-section of the connecting channel between the exhaust gas connection interface and the supply connection interface is constructed so as to be consistent.

7. The exhaust gas system for an internal combustion engine according to claim 1 , wherein a total number of exhaust gas connection interfaces at the exhaust gas system corresponds precisely to a total number of supply connection interfaces at the exhaust gas turbocharger.

8. The exhaust gas system for an internal combustion engine according to claim 1 , wherein connecting channels belonging respectively to different combustion chambers, for the uniform action upon the turbocharger, are constructed connected to supply connection interfaces which are arranged axially symmetrically to the rotation axis of a runner of the exhaust gas turbocharger.

9. The exhaust gas system for an internal combustion engine according to claim 1 , wherein via a flow channel arranged between the supply connection interface and a runner of the exhaust gas turbocharger, an unchangeable angle of incidence onto the runner is set, and wherein the angle of incidence is preferably between 65° and 75°, in particular 70°.

Assignees

• Univ Stuttgart

Inventors

• Challand Sebastian
• Dirschauer Eckart

Classifications

• F05D2220/40

  in turbochargers · CPC title

• F01N13/107 Primary

  More than one exhaust manifold or exhaust collector · CPC title

• F01N13/105 Primary

  having the form of a chamber directly connected to the cylinder head, e.g. without having tubes connected between cylinder head and chamber · CPC title

• F02B37/22

  by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) · CPC title

• F02F1/42

  Shape or arrangement of intake or exhaust channels in cylinder heads · CPC title