Browse Publications Technical Papers 2019-01-1491
2019-06-05

A Study on NVH Performance Improvement of TPE Air Intake Hose Based on Optimization of Design and Material 2019-01-1491

Environmental regulations and fuel economy regulations on automobiles have been tightened recently. To counter this regulation, the global automobile industry is focusing its capabilities on weight reduction and continuously expanding and applying the fuel efficient turbo engine. However, with turbo-engine, turbulence occurs in the wheels of the turbochargers rotating at tens of thousands to hundreds of thousands of rpm, resulting in airflow noise. This noise is transmitted indoors through the air intake system, greatly weakening the vehicle's competitiveness. Therefore, in the case of turbo-engine, it is essential to ensure the high frequency noise reduction performance of the air intake system. The air intake system consists of an air cleaner, an air filter, an air intake hose and an air duct. The air flow noise of turbo-engine is mainly the emission noise emitted through the walls of the air intake system. These radiations are delivered in order of air-intake hoses, air cleaner and air duct. Therefore, in order to improve this radiation noise, it is effective to reduce the noise at the intake hose located at the beginning of the noise transmission path. In the past, to reduce the emission noise of the intake hose, rubber hoses with excellent vibration insulation and acoustic insulation were mainly used, but they are not recyclable and have high density. To overcome these shortcomings, TPE hoses that are light and durable have been mainly used. However, the properties of the rigid TPE materials reduce vibration insulation and transmission noise reduction performance compared to rubber hoses. This paper describes how to improve the NVH performance by optimizing the design of TPE air intake hose and improving the damping performance of the material.

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