Exhaust gas purification system

Patent metadata

Field	Value
Publication number	US-10683791-B2
Application number	US-201816100786-A
Country	US
Kind code	B2
Filing date	Aug 10, 2018
Priority date	Feb 12, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An exhaust gas purification system has a first exhaust gas purification element, a second exhaust gas purification element, a first exhaust gas part flow duct, and a second exhaust gas part flow duct. The second exhaust gas purification element is arranged geometrically after the first exhaust gas purification element. The first exhaust gas part flow duct has a first exhaust gas passage area and the second exhaust gas part flow duct has a second exhaust gas passage area. The exhaust gas passage areas are aligned parallel to a projection plane and the first and second exhaust gas part flow ducts are arranged geometrically one after another. The two exhaust gas part flow ducts are arranged such that a partial flow channel axis that is orthogonal to the projection plane passes through the first and second exhaust gas passage areas.

First claim

What is claimed is:

1. An exhaust gas purification system for an internal combustion engine of a motor vehicle, comprising:
a first exhaust gas purification element through which exhaust gas can flow;
a second exhaust gas purification element which is connected in flow terms in parallel with the first exhaust gas purification element and through which exhaust gas can flow;
a first exhaust gas part flow duct which is connected in flow terms in parallel with the first exhaust gas purification element; and
a second exhaust gas part flow duct which is connected in flow terms in parallel with the second exhaust gas purification element;
wherein the second exhaust gas purification element is disposed geometrically behind the first exhaust gas purification element;
wherein a perpendicular projection of an exhaust gas outlet area of the first exhaust gas purification element onto a projection plane, which is penetrated orthogonally by a longitudinal axis of the first exhaust gas purification element, is covered at least partially by a perpendicular projection of an exhaust gas inlet area of the second exhaust gas purification element onto the projection plane;
wherein the first exhaust gas part flow duct has a first exhaust gas passage area, through which exhaust gas can flow, wherein the second exhaust gas part flow duct has a second exhaust gas passage area, through which exhaust gas can flow, wherein the first and the second exhaust gas passage areas are oriented parallel to the projection plane, and wherein the first and the second exhaust gas part flow ducts are disposed geometrically behind one another;
wherein the first and the second exhaust gas part flow ducts are disposed such that a part flow duct axis, which is orthogonal with respect to the projection plane, passes through the first and the second exhaust gas passage areas.

2. The exhaust gas purification system as claimed in claim 1 , wherein the first exhaust gas purification element and the second exhaust gas purification element have at least substantially a same flow resistance and wherein the first and the second exhaust gas passage areas have at least substantially a same area.

3. The exhaust gas purification system as claimed in claim 1 , further comprising an exhaust gas guiding device that is disposed between the exhaust gas outlet area of the first exhaust gas purification element and the exhaust gas inlet area of the second exhaust gas purification element, wherein the exhaust gas guiding device guides an exhaust gas flow which exits from the exhaust gas outlet area of the first exhaust gas purification element into the second exhaust gas part flow duct and guides an exhaust gas flow which flows through the first exhaust gas part flow duct to the exhaust gas inlet area of the second exhaust gas purification element.

4. The exhaust gas purification system as claimed in claim 3 , wherein the exhaust gas guiding device together with an exhaust gas system housing, which surrounds the first and the second exhaust gas purification elements, closes off the exhaust gas inlet area of the second exhaust gas purification element in a fluid-tight manner with respect to the exhaust gas outlet area of the first exhaust gas purification element.

5. The exhaust gas purification system as claimed in claim 3 , wherein the exhaust gas guiding device is a sheet metal bent part.

6. The exhaust gas purification system as claimed in claim 4 , wherein the exhaust gas guiding device is a sheet metal bent part.

7. The exhaust gas purification system as claimed in claim 1 , wherein the first exhaust gas purification element and/or the second exhaust gas purification is an exhaust gas particulate filter.

8. The exhaust gas purification system as claimed in claim 1 , wherein the first exhaust gas purification element and/or the second exhaust gas purification element is an exhaust gas catalytic converter.

9. The exhaust gas purification system as claimed in claim 1 , further comprising an exhaust gas flow manifold, wherein the exhaust gas flow manifold has an exhaust gas outflow opening through which an exhaust gas flow is flowable out of the exhaust gas purification system and wherein the exhaust gas flow manifold connects the second exhaust gas part flow duct and an exhaust gas outlet area of the second exhaust gas purification element in a fluid-conducting manner to the exhaust gas outflow opening.

10. The exhaust gas purification system as claimed in claim 1 , further comprising an exhaust gas flow divider, wherein the exhaust gas flow divider has an exhaust gas inlet opening through which an exhaust gas flow enters into the exhaust gas purification system and wherein the exhaust gas flow divider connects the first exhaust gas part flow duct and an exhaust gas inlet area of the first exhaust gas purification element in a fluid-conducting manner to the exhaust gas inlet opening.

11. The exhaust gas purification system as claimed in claim 9 , wherein the exhaust gas flow manifold is a sheet metal component.

12. The exhaust gas purification system as claimed in claim 10 , wherein the exhaust gas flow divider is a sheet metal component.

13. The exhaust gas purification system as claimed in claim 9 , wherein the exhaust gas flow manifold is connected in an integrally joined manner to an exhaust gas system housing.

14. The exhaust gas purification system as claimed in claim 10 , wherein the exhaust gas flow divider is connected in an integrally joined manner to an exhaust gas system housing.

15. The exhaust gas purification system as claimed in claim 3 , wherein the first exhaust gas part flow duct and/or the second exhaust gas part flow duct is delimited at least in sections or completely by an exhaust gas system housing and the exhaust gas guiding device.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Pruss Markus

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• Y02A50/20

  Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title

• F01N3/2885

  with exhaust silencers in a single housing · CPC title

• F01N3/2892

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title

• F01N13/017 Primary

  the purifying devices are arranged in a single housing · CPC title