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Numerical Simulation of Catalytic Converter and Emissions of Motorcycle for National Stage Ⅲ Standards

Author: ShangHuiChao
Tutor: ZhangLi
School: Chongqing University
Course: Vehicle Engineering
Keywords: Motorcycle emissions Catalytic Converter National III emission standards Vehicle test
CLC: U483
Type: Master's thesis
Year: 2011
Downloads: 6
Quote: 0
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Abstract


In this paper, a section motorcycle for the study, carried out on the basis of the test simulation engine emissions control. Simulation analysis of catalyst sample characteristics, and then build the engine numerical model to simulate the vehicle steady-state operating conditions of its emissions and the impact on the conversion rate of the catalytic converter, the last vehicle urban running The calculation of the loop, forming a set of engine emission control simulation method. Specific work as follows: ① CES08A catalytic activity evaluation tester 0.97,1 and 1.03 when the ignition temperature characteristics of the air-fuel ratio of the catalyst sample characteristics and oxygen balance coefficient test test. The air-fuel ratio characteristic result shows a higher conversion efficiency of the catalyst for CO, and are maintained at more than 90%. This is because the formulation of the catalyst rich in noble metal element such as Pt, Pd, of CO catalytic purification ability. Ignition temperature characteristic results show little effect on the oxygen balance ignition temperature coefficient of CO. BOOST software to establish catalytic converters reaction model and its numerical solution, the results are in good agreement with the test results, verify the correctness of the model, and laid the foundation for the calculation of vehicle emissions. (2) through the engine test platform, the outer characteristics of the engine and the cylinder combustion pressure and intake and exhaust transient pressure testing and analysis. By cyclic test based on simulation software engine numerical model to determine the model parameters and input at the same time a detailed discussion. Verify the correctness of the model, and laid the basis for calculation of the conditions for the next vehicle cycle through the comparison of the simulation and the experimental values. Numerical model based on the establishment of the emission characteristics of the different operating conditions of the engine simulation. ③ of the vehicle on the chassis dynamometer emissions testing different speeds were measured location contaminants qi and not qi two states, the first one before and after the catalytic converter, and then use the numerical model to its simulation calculation, the resultant pollutants trend is consistent with the experimental results. The vehicle emissions testing UDC conditions, respectively, using the direct mining and bags collected two sampling methods. Constant volume sampling results show the car to achieve the requirements of the National III emission regulations. While taking advantage of the numerical model to calculate a single urban run cycle, obtained close to the CO cumulative emissions test results through simulation can provide a supporting role for experimental and research.

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CLC: > Transportation > Road transport > Other road transport > Motorcycles, motorized bicycles
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