关键词: 乘用皮卡；排气系统；性能仿真；性能试验

Abstract: The exhaust system is an important structural system for passenger pickup truck models. Whether its structural design is reasonable is not only related to its own durability and reliability, but also directly affects the noise, vibration and harshness (NVH) performance, power economy performance, emissions and other performance of the entire vehicle. To ensure that the exhaust system performance of a passenger pickup truck development model meets the requirements of national policies and regulations, this paper uses computer aided engineering (CAE) simulation method and experimental testing methods, conduct exhaust system strength analysis, NVH modal analysis, temperature field analysis, noise testing, and road acceleration testing analysis of a passenger pickup truck model, and conduct detailed verification of the performance indicators of the exhaust system. The results show that at a frequency of 27 Hz, the maximum stress of the exhaust system suspension support is 214.9 MPa, which is less than the material yield strength. At the same time, the NVH mode avoids the engine idle resonance frequency, and the temperature field is evenly distributed and the highest temperature is lower than the temperature limit of the steel, meeting the design objectives and effectively enhancing the comprehensive market competitiveness of the passenger pickup truck model.

Key words: Passenger pickup truck; Exhaust system; Performance simulation; Performance experimental