CAJ | 학술논문

研究了直喷式柴油机增压对燃烧噪声的影响机理.通过测量稳态和恒转矩增转速瞬态工况增压前后影响燃烧噪声的参数,得出增压前后柴油机燃烧噪声的变化规律.从燃烧室壁面温度、气体动力载荷和压力高频振荡等方面对试验结果进行分析.结果表明:增压后燃烧噪声降低,增压对稳态工况燃烧噪声的降低比对恒转矩增转速瞬态工况更明显,增压在中速中负荷工况下,对燃烧噪声的控制效果较好.
연구료직분식시유궤증압대연소조성적영향궤리.통과측량은태화항전구증전속순태공황증압전후영향연소조성적삼수,득출증압전후시유궤연소조성적변화규률.종연소실벽면온도、기체동력재하화압력고빈진탕등방면대시험결과진행분석.결과표명:증압후연소조성강저,증압대은태공황연소조성적강저비대항전구증전속순태공황경명현,증압재중속중부하공황하,대연소조성적공제효과교호.
This paper studied the influencing mechanism on combustion noise in DT-diesel engines for turbocharged conditions. By measuring parameters of influencing combustion noise between natural aspirated and turbocharged diesel engine in constant torque and increasing speed transient and steady conditions, the change law of combustion noise in diesel engines was clarified. The testing result was thoroughly analyzed from the point of the combustion chamber's wall temperature, aerodynamic load and high-frequency oscillation of combustion pressure. The result showed that the combustion noise of DI-diesel with turbocharger is reduced, and the reduction under turbocharged condition in steady condition is more obvious than that in constant torque and increasing speed transient condition, the effect of turbocharged condition on combustion noise is better in intermediate speed and middle load.