Engine power performance improving system and method

Abstract

The invention discloses an engine power performance improving system and method. The system comprises a supercharged air bypass pipeline arranged between an air outlet of a compressor and an air inletof a turbine, and a supercharged air bypass valve arranged on the supercharged air bypass pipeline. The supercharged air bypass valve is electrically connected to an engine control unit. The method comprises the steps: when it is determined that the supercharged air bypass valve is allowed to be opened and an engine is currently operated in a preset working condition interval allowing the supercharged air bypass valve to be opened, controlling to open the supercharged air bypass valve; and carrying out secondary judgment on whether the supercharged air bypass valve is allowed to be opened ornot, and controlling to close the supercharged air bypass valve when the secondary judgment still allows the supercharged air bypass valve to be opened and the current operation of the engine leaves the working condition interval for more than preset time T1. According to the engine power performance improving system and method, under the condition that other configurations are not additionally changed, the torque storage capacity at a low rotating speed can be remarkably improved, and the power performance of the engine can be improved.

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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