Sequential two-stage supercharging system for constant-pressure exhaust pipe

Abstract

The invention discloses a sequential two-stage supercharging system for a constant-pressure exhaust pipe, and relates to the technical field of two-stage supercharging systems. The sequential two-stage supercharging system comprises a constant-pressure exhaust pipe, wherein an exhaust gas inlet and an exhaust gas outlet are oppositely arranged on the constant-pressure exhaust pipe, and the exhaustgas inlet inclines towards the exhaust gas outlet. The sequential two-stage supercharging system disclosed by the invention is capable of solving problems in a conventional medium-heavy engine and marine engine that how to ensure compact arrangement of superchargers while reduce production cost; how to deal with the increased loss caused by the twisting of air flow as an exhaust pipe is limited by an exhaust flow channel; how to improve system response at a low engine speed; and how to effectively control an explosion pressure value at a high engine speed.

Description

technical field [0001] The invention relates to the technical field of two-stage supercharging systems, in particular to a sequential two-stage supercharging system for constant-pressure exhaust pipes. Background technique [0002] The turbocharger uses the energy of the exhaust gas from the engine to increase the intake air density of the engine. At present, the engine power continues to increase, which puts forward higher requirements on the supercharging system. The supercharging pressure of the engine after the two-stage supercharging can be greatly increased, and both the high- and low-pressure superchargers can work in a relatively high-efficiency working area. When the two superchargers are working, the engine flow range is greatly expanded. In the series two-stage supercharging system, the supercharging pressure can be increased to about 6.0 (that is, the engine inlet pressure reaches 6 atmospheres), which is difficult to achieve with a single-stage supercharging sy...

AI Technical Summary

Problems solved by technology

[0010] However, this device is limited to series supercharging, and cannot realize the high-voltage stage disconnection at high speed or under desired working conditions, and only the low-pressure stage works.

[0011] To sum up, it can be seen that the research and development personnel of the prior art focus on how to carry out a compact integrated design for small and medium-sized engines, but they ignore that due to the high processing cost and difficulty in processing, it is impossible to apply it in a large volume Medium and heavy engines, marine engines and other occasions; and the sequential connection of a single mode cannot guarantee to improve the response of the system when the engine rotates at low speeds, and how to effectively control the explosion pressure value of the engine at high speeds; and the existing two-stage booster The exhaust pipe of the pressure system is limited by the exhaust flow path, which increases the loss caused by the torsion of the airflow

Therefore, there are obviously inconveniences and defects in the actual use of the prior art, so it is necessary to improve

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