Engine exhaust pipeline structure

Abstract

The invention discloses an engine exhaust pipeline structure. The engine exhaust pipeline structure comprises a first exhaust pipe and a second exhaust pipe which are arranged side by side. The first exhaust pipe is formed by connecting a first inlet pipe, first module pipes and at least one first pipe set in sequence. The second exhaust pipe is formed by connecting a second inlet pipe and at least one second pipe set in sequence. The first inlet pipe, the first module pipe and the second inlet pipe are correspondingly arranged. The first pipe set and the second pipe set are correspondingly arranged. By means of the structure, the modular design is carried out on the first exhaust pipe and the second exhaust pipe, a segmented arrangement form of various cylinder exhaust pipes is presented, and the engine exhaust pipeline structure is simpler, more reasonable and more attractive in appearance. Meanwhile, the casting difficulty can be obviously lowered through the modular design of the cylinder exhaust pipes, the exhaust pipeline transition is smoother, the yield of castings is increased, and the assembling technology is improved.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an engine exhaust pipeline structure. Background technique [0002] Exhaust gas turbocharging exhaust method is the most commonly used supercharging method for engines at present. However, due to the number of engine cylinders, ignition sequence and different applications, the exhaust gas turbocharging arrangement is often divided into constant pressure turbocharging and pulse turbocharging. pressure. At present, most marine engines are actually used in low-speed and low-load conditions for a long time, and under this condition, the exhaust energy of the engine is small, the speed of the turbocharger is low, and the acceleration response is poor, resulting in the engine under this condition. Lower torque. However, for most marine engines, it is very necessary to increase the low-speed high torque, and the reasonable design of the exhaust system is one of the effecti...

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Problems solved by technology

Both of the above two patents are made of integral casting or welding, the exhaust pipeline is highly integrated, the structure is complex, casting or welding is difficult, and the product failure rate is high.

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