Exhaust system for internal combustion engine

Abstract

The present disclosure provides an exhaust system for an internal combustion engine, the exhaust system comprising a first exhaust pipe, a muffler and a second exhaust pipe, and the muffler is mounted between the first exhaust pipe and the second exhaust pipe, the first exhaust pipe is located upstream of the muffler, and the second exhaust pipe is located downstream of the muffler; the second exhaust pipe comprises a single exhaust pipe, the single exhaust pipe having one end connected to a downstream end of the muffler, and the single exhaust pipe being provided with a plurality of connecting holes; or, the second exhaust pipe comprises the single exhaust pipe and a dual exhaust pipe branch, the single exhaust pipe having one end connected to the downstream end of the muffler and the other end connected to the dual exhaust pipe branch.

Description

CROSS REFERENCE TO THE RELATED APPLICATION[0001]This application is based upon and claims priority to Chinese Patent Application No. 201921694694.8, filed on Oct. 11, 2019, the entire content of which is incorporated herein by reference.FIELD[0002]The present disclosure relates to the automotive field, and in particular to an exhaust system for an internal combustion engine.BACKGROUND[0003]In the automotive field, an exhaust system is a system for controlling emissions and noises of a vehicle, and is arranged under an entire chassis of the vehicle, connected to an exhaust manifold of an engine, and suspended below a floor of a vehicle body. Therefore, the exhaust system usually has a complicated shape trend, but it is also a key component related to the vibration and noises of the whole vehicle.[0004]A muffler is mainly used to reduce exhaust noises of the engine and ensure that high-temperature waste gases are exhausted safely and efficiently. As a part of an exhaust pipe, the muff...

AI Technical Summary

Benefits of technology

This patent describes a new exhaust system for gasoline engines that reduces vibration, noise, and manufacturing costs. It uses one muffler at the cold end and a special design to restrain standing waves. The system also has a long exhaust pipe that improves acoustic performance at low engine speeds.

Problems solved by technology

Therefore, the exhaust system usually has a complicated shape trend, but it is also a key component related to the vibration and noises of the whole vehicle.

As shown in FIG. 1 to FIG. 3, a conventional exhaust system for an internal combustion engine usually comprises at least two mufflers 20, which increase the weight of an exhaust system for a gasoline engine, need more installation space, and also greatly increase costs.

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