Vehicle engine inlet simulation calculation method and apparatus

Abstract

The invention discloses a vehicle engine inlet simulation calculation method and apparatus. The method comprises the steps of determining inlet valve lift test points of an inlet of a vehicle engine, and determining inlet simulation models corresponding to the inlet valve lift test points; performing gridding on the inlet simulation models corresponding to the inlet valve lift test points; setting calculation domain boundary conditions corresponding to the gridded inlet simulation models, and setting a calculation solver by utilizing a fluid mechanics theory; and according to the calculation domain boundary conditions and the gridded inlet simulation models, performing calculation by utilizing the calculation solver to obtain simulation results corresponding to the inlet lift test points. The method is simple in calculation operation, short in cycle, low in cost and high in calculation precision; a calculation model is relatively flexible to build; the method and the apparatus can be used for comparative optimization among multiple inlet schemes; the scheme with the best inlet performance is selected according to the results; and engine design can be assisted.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a method and device for simulation calculation of a vehicle engine intake port. Background technique [0002] At present, energy shortage and environmental pollution have received extensive attention around the world. In the vehicle industry, the national regulations on vehicle emissions and fuel consumption are becoming more and more stringent. Therefore, vehicle companies have adopted a series of new technologies in engine applications to meet these requirements, such as using in-cylinder direct injection and Supercharging technology can improve engine power while reducing fuel consumption and emissions. However, the realization of this technology puts forward higher requirements for engine design. [0003] The structural design of the intake port directly affects the intake air volume of the engine and the airflow movement in the cylinder. Reasonable organization ...

AI Technical Summary

Problems solved by technology

The existing main method for evaluating engine airway performance is the airway test method. The airway flow coefficient and tumble / vortex intensity corresponding to each valve lift are tested through bench tests, but the test period is long and the cost is high. And for the various airway schemes designed, the feasibility of the test method is poor, and it is not easy to realize

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