汽车声品质与进排气系统设计课件.ppt

汽车声品质与进排气系统的设计 Vehicle Sound Quality and Intake/Exhaust System Design;声品质介绍Introduction of Sound Quality 动力系统的声品质Powertrain Sound Quality 进排气系统与声品质控制Intake/Exhaust Systems and Sound Quality Control 发动机性能与噪声之间的平衡Balance between Engine Performance and Noise Optimization;声品质Sound Quality: 主观评价Subjective Evaluation;传统上, 噪声控制就是降低声音的大小Historically, Approach Vehicle Sound as Noise Control 仅考虑声级的大小Only sound Level is considered 集中在主要的贡献源Focus on major contributors, such as, P/T, road, wind noise 八十年代后, 在汽车界开始使用声品质Sound Quality in Automotive Industry in late 1980s 汽车的声音与频率和发动机转速有关Sound is related with frequency and engine speed 声音的成分影响听觉Sound contents influence listening 声音影响到顾客的满意度All vehicle sounds can influence customer satisfaction 部件的声品质Component sound quality 声品质既是主观的, 也是客观的Sound Quality is subjective evaluation as well as objective testing ;蜘蛛图Spider Chart;心理学对声品质的评价的指标Sound Quality Oubjective Metrics by Psychoacoustics 响度Loudness 锐度Sharpness 声覆盖Masking 声调制Modulation 纯音度Tonality …;为什么要求声品质Why Sound Quality?;例子:门的声品质Example: Door Sound Quality;声品质分析设计流程 Processing of Sound Quality Analysis and Design;声品质介绍Introduction of Sound Quality 动力系统的声品质Powertrain Sound Quality 进排气系统与声品质控制Intake/Exhaust Systems and Sound Quality Control 发动机性能与噪声之间的平衡Balance between Engine Performance and Noise Optimization;动力系统的声品质Powertrain Sound Quality;发动机辐射噪声Engine radiation noise 进气口噪声Intake orifice noise 排气尾管噪声Exhaust tailpipe noise 传动系统的辐射噪声Driveline radiation noise 结构噪声Structural-borne sound;声(响度)级和阶次: Sound (Loudness) Level and Order Content;豪华车 Luxury Car;跑车 Sports Car;声音的阶次主要由进排气来调节Sound order can be adjusted by intake and exhaust system Intake: manifold Exhaust: manifold, Y-pipe, exhaust system design 对跑车For sporty cars: The firing orders and half orders are kept The intake runners have different length The exhaust runner have different length Exhaust Y-pipe has different length 对豪华车For luxury cars: The half orders are reduced as low as possible The intake runners should be kept a