Open Access

ARTICLE

Optimal Design of Intake System for Racing Engine

Yang Sun¹, Runze Yang^2,*

1 School of Automotive Engineering, Hubei University of Automotive Technology, Shiyan, 442002, China
2 Key Laboratory of Automotive Power Train and Electronics, Hubei University of Automotive Technology, Shiyan, 442002, China

* Corresponding Author: Runze Yang. Email:

Fluid Dynamics & Materials Processing 2025, 21(7), 1737-1751. https://doi.org/10.32604/fdmp.2025.063103

Received 05 January 2025; Accepted 15 May 2025; Issue published 31 July 2025

Abstract

The intake system of a racing engine plays a crucial role in determining its performance, particularly in terms of volumetric efficiency, power output, and throttle response. According to Formula Society of Automotive Engineers (FSAE) regulations, the engine intake system must incorporate a 20 mm diameter flow-limiting valve within the intake manifold. This restriction significantly reduces the airflow into the engine, leading to a substantial drop in power output. To mitigate this limitation, the intake system requires a redesign. In this study, theoretical calculations and one-dimensional thermodynamic simulations are employed to determine the optimal parameters for the intake system. A numerical simulation of the intake system’s flow field is then conducted to refine its structure and layout. Finally, experiments are performed on an engine equipped with the optimized intake system, and its feasibility is evaluated based on experimental results. The findings indicate that the maximum engine torque increases from 56.36 to 59.91 N·m, while the maximum power output rises from 59.16 to 63.94 kW. To further enhance performance and adaptability across different competitions, a variable-length intake manifold control system is also designed, improving both power delivery and overall operational stability of the racing car.

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Keywords

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