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Optimization of Gasoline Engine Intake System Based on 1D,3D and Coupled Simulations

Jianxin Wang

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Abstract

In this paper,a working process numerical model of a 4-cylinder 4-stoke electronic fuel injection(EFI) gasoline engine based on 1D computational fluid dynamics(CFD) intake and exhaust system was established and testified,the intake manifold length and engine valve timing were optimized.Based on the optimized results using 1D model,a 3D steady CFD model of intake manifold was set up,and the pressure loss and the charge uniformity between sub-pipes were analyzed.Finally a 1D-3D coupled model for engine cycle simulation was set up,and the dynamic flow of intake manifold during the engine working process was analyzed in detail.Besides these,the effect of manifold length and valve timing on the intake flow was also analyzed.

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What this paper is about

In this paper,a working process numerical model of a 4-cylinder 4-stoke electronic fuel injection(EFI) gasoline engine based on 1D computational fluid dynamics(CFD) intake and exhaust system was established and testified,the intake manifold length and engine valve timing were optimized.Based on the optimized results using 1D model,a 3D steady CFD model of intake manifold was set up,and the pressure loss and the charge uniformity between sub-pipes were analyzed.Finally a 1D-3D coupled model for engine cycle simulation was set up,and the dynamic flow of intake manifold during the engine working process was analyzed in detail.Besides these,the effect of manifold length and valve timing on the intake flow was also analyzed.

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Available abstract

In this paper,a working process numerical model of a 4-cylinder 4-stoke electronic fuel injection(EFI) gasoline engine based on 1D computational fluid dynamics(CFD) intake and exhaust system was established and testified,the intake manifold length and engine valve timing were optimized.Based on the optimized results using 1D model,a 3D steady CFD model of intake manifold was set up,and the pressure loss and the charge uniformity between sub-pipes were analyzed.Finally a 1D-3D coupled model for engine cycle simulation was set up,and the dynamic flow of intake manifold during the engine working process was analyzed in detail.Besides these,the effect of manifold length and valve timing on the intake flow was also analyzed.

Key concepts: Inlet manifold, Computational fluid dynamics, Exhaust manifold, Petrol engine, Cylinder, Automotive engineering, Manifold (fluid mechanics), Flow (mathematics)

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Optimization of Gasoline Engine Intake System Based on 1D,3D and Coupled Simulations — Research Paper | ScholarLens