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CA7204MT automobile powertrain parameter optimization matches

Author: ShenAiLing
Tutor: WangAiLun
School: Central South University
Course: Mechanical Manufacturing and Automation
Keywords: Engine Driveline Match Optimization
CLC: U463.2
Type: Master's thesis
Year: 2011
Downloads: 141
Quote: 0
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Abstract


CA7204MT car was developed by Volkswagen in 2006 one of the models of the Pentium series sedan , the subject of its powertrain matching studies using optimization theory seeking power and fuel economy of the optimum driveline parameter design , aimed at possible superior power to keep the original car under the premise of reducing fuel consumption . This paper established automotive drivetrain power and fuel economy of dual objective function optimization mathematical model , using the interior point penalty function method driveline parameters obtained optimal solution , combined with professional automotive simulation software validation optimized results. Firstly, the mathematical model based on the engine test data by fitting the external characteristics of the engine and universal characteristic curve ; equation by a mathematical model cars , exporting power and fuel economy evaluation index calculation methods ; On this basis , select the place start acceleration time and multi-state cycle one hundred kilometers fuel consumption calculated as the optimization objective function, optimal matching of automobile powertrain mathematical model , optimization algorithm can effectively solve the chosen inequality constraints penalty function method and the Powell conjugate unconstrained solution, in this paper, the calculation of multi-objective optimization problem evaluation function minimization method to determine the power and fuel economy of the two sub- objective function of the weighting factor , so that the two sub-goals in the whole question of the importance of accurately reflect so the optimizer calculation results more credible . Finally CA7204MT sedan powertrain optimization matching calculations, and to optimize the results of input AVL Cruise company provided free trial version of the software , the car simulation, and simulation and optimization results were compared before , from the power and fuel economy analysis assess the effect of optimization . The topic for the other models powertrain design and optimization of parameters of reference.

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