System and method for improving engine power performance

Abstract

The invention discloses a system and method for improving the power performance of an engine. The system includes a supercharged air bypass pipeline arranged between the air outlet of the compressor and the inlet of the turbine, and a supercharged air bypass pipeline arranged on the supercharged air bypass pipeline. charge air bypass valve. The charge air bypass valve is electrically connected with the engine control unit. The method includes: when it is determined that the boost air bypass valve is allowed to be opened and the engine is currently running in a preset operating range that allows the boost air bypass valve to be opened; controlling the opening of the boost air bypass valve; The air bypass valve performs a second judgment. If the second judgment still allows the boost air bypass valve to be opened, and the engine is currently running out of the operating range for more than the preset time T1, the boost air bypass valve is controlled to be closed. The present invention can significantly increase the torque reserve capacity at low rotation speeds and improve the power performance of the engine without additionally changing other configurations.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a system and method for improving the power performance of a marine engine. Background technique [0002] In the development of marine diesel engines, there are usually low-speed and high-torque requirements, but in the actual turbocharger matching, it is impossible to take into account the torque reserve requirements at low speeds and the diesel engine power performance and economic indicators at high speeds, or choose large boosting capacity A supercharger can meet the diesel engine performance and economic indicators at high speeds, sacrificing the power requirements at low speeds; or choose a supercharger with a smaller supercharging capacity to meet the torque reserve requirements at low speeds, sacrificing the diesel engine at high speeds Power performance and economic indicators. [0003] In view of this, there is an urgent need to improve the existing technol...

AI Technical Summary

Problems solved by technology

[0002] In the development of marine diesel engines, there are usually low-speed and high-torque requirements, but in the actual turbocharger matching, it is impossible to take into account the torque reserve requirements at low speeds and the diesel engine power performance and economic indicators at high speeds, or choose large boosting capacity A supercharger can meet the diesel engine performance and economic indicators at high speeds, sacrificing the power requirements at low speeds; or choose a supercharger with a smaller supercharging capacity to meet the torque reserve requirements at low speeds, sacrificing the diesel engine at high speeds Power performance and economic indicators

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