Exhaust system for an internal combustion engine and method for operating the exhaust system
View Patent ↗An exhaust system is provided for an internal combustion engine having at least a first and a second cylinder, wherein the first cylinder is assigned a first exhaust gas pipe and the second cylinder is assigned a second exhaust gas pipe. The first exhaust gas pipe is assigned a first muffler, and the second exhaust gas pipe is assigned a second muffler. A first damping pipe branches off from the first exhaust gas pipe upstream of a first shut-off element. The damping pipe firstly opens into a first reflection chamber and is subsequently led through the first muffler and opens into the second exhaust gas manifold downstream of a second shut-off element. A second damping pipe branches off from the second exhaust gas pipe upstream of a second shut-off element. The second damping pipe firstly opens into a second reflection chamber and is subsequently led through the second muffler and opens into the first exhaust gas pipe downstream of the first shut-off element.
1. An exhaust system for an internal combustion engine having at least a first and a second cylinder, the exhaust system comprising:
a first exhaust pipe assigned to the first cylinder;
a second exhaust pipe assigned to the second cylinder;
a first muffler assigned to the first exhaust pipe;
a second muffler assigned to the second exhaust pipe;
a first damping pipe branching off of the first exhaust pipe upstream of a first shut-off element in the first exhaust pipe;
a second damping pipe branching off of the second exhaust pipe upstream of a second shut-off element in the second exhaust pipe, wherein
the first damping pipe leads first into a first reflection chamber and subsequently extends through the first muffler and leads into the second exhaust pipe downstream of the second shut-off element, and
the second damping pipe leads first into a second reflection chamber and subsequently extends through the second muffler and leads into the first exhaust pipe downstream of the first shut-off element.
2. The exhaust system according to claim 1 , further comprising:
at least one of a third reflection chamber assigned to the first exhaust pipe downstream of the first shut-off element and a fourth reflection chamber assigned to the second exhaust pipe downstream of the second shut-off element.
3. The exhaust system according to claim 2 , wherein
at least one of the first exhaust pipe is connected by way of perforations in an exhaust-gas-carrying manner with the third reflection chamber and the second exhaust pipe is connected by way of perforations in an exhaust-gas-carrying manner with the fourth reflection chamber.
4. The exhaust system according to claim 3 , wherein
at least one of the first and the third reflection chambers are connected with one another in an exhaust-gas-carrying manner and the second and the fourth reflection chambers are connected with one another in an exhaust-gas-carrying manner.
5. The exhaust system according to claim 2 , wherein
at least one of the first and the third reflection chambers are connected with one another in an exhaust-gas-carrying manner and the second and the fourth reflection chambers are connected with one another in an exhaust-gas-carrying manner.
6. The exhaust system according to claim 1 , further comprising a common housing in which the first and the second mufflers are arranged.
7. The exhaust system according to claim 6 , wherein the first and the second reflection chambers are arranged in the common housing.
8. The exhaust system according to claim 7 , wherein the third and the fourth reflection chambers are arranged in the common housing.
9. The exhaust system according to claim 6 , wherein the third and the fourth reflection chambers are arranged in the common housing.
10. A method of operating an exhaust system for an internal combustion engine having at least a first and a second cylinder, the method comprising the acts of:
providing a first exhaust pipe assigned to the first cylinder;
providing a second exhaust pipe assigned to the second cylinder;
providing a first muffler assigned to the first exhaust pipe;
providing a second muffler assigned to the second exhaust pipe;
providing a first damping pipe branching off of the first exhaust pipe upstream of a first shut-off element in the first exhaust pipe;
providing a second damping pipe branching off of the second exhaust pipe upstream of a second shut-off element in the second exhaust pipe, wherein the first damping pipe leads first into a first reflection chamber and subsequently extends through the first muffler and leads into the second exhaust pipe downstream of the second shut-off element, and the second damping pipe first leads into a second reflection chamber and subsequently extends through the second muffler and leads into the first exhaust pipe downstream of the first shut-off element; and
opening the first and second shut-off elements for minimal muffling.
11. The method according to claim 10 , further comprising the act of:
opening the first shut-off element and closing the second shut-off element for medium muffling.
12. The method according to claim 11 , further comprising the act of:
closing the first and the second shut-off elements for maximum muffling.
13. The method according to claim 10 , further comprising the act of:
closing the first and the second shut-off elements for maximum muffling.