Abstract
The identification and solution of NVH problem is the main way to continuously improve the comfort in the mechanical field. With the application of 350 bar high pressure fuel supply system, the solution of noise problem of high-pressure system has become an important work content in the development of sound quality of automobile cab. This paper studies the noise reduction of high-pressure direct injection engine, comprehensively analyzes the key factors of high-pressure direct injection system noise, and provides new ideas and references for the system to solve the high-pressure direct injection noise problem. The main path solutions for high-pressure direct injection noise and vibration problems in the mechanical field are to optimize the structural mode, increase vibration isolation, change the pipeline direction, and optimize the injection strategy.
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