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Technical Paper

Use of Blow Molding to Improve Weight, Cost, Assembly and Performance Characteristics of UnderHood Components

As the global automotive industry continues to strive for improved performance at lower costs, the use of blow-molded thermoplastics in underhood components offers a wide range of benefits, including: 1. Cost reduction 2. Weight reduction 3. Improved recyclability 4. Multi-functional part design opportunities 5. Reduction in number of parts and materials in the engine compartment 6. Greater temperature resistance to handle increasing powertrain temperatures 7. Easier assembly/disassembly for productivity improvements and cost savings in the manufacturing process 8. Reduced noise 9. Improved engine performance (up to 2 percent) Underhood applications where blow-molded technology can provide these advantages include turbo- charge ducts, air ducts, crankcase venting hoses, resonators, coolant reservoirs, and pipes and hoses for oil cooling, air conditioning and coolant systems. This technology is now used in the European automotive market and in Japan.
Technical Paper

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

Environmental and fuel economy regulations (Eu 6d and WLTP RDE) on automobiles have been tightened recently. To counter this regulation, the global automobile industry is focusing on weight reduction, fuel efficient turbo charger, cooled EGR, thermal management, low friction and so on. However, the high-speed turbocharger makes turbulence, and resulting in airflow noise. This noise is transmitted indoor through the air intake system, which adversely affects the vehicle's competitiveness. Therefore, for turbo engine, it is essential to reduce the noise of the air intake system. The air intake system consists of air cleaner, air filter, air intake hose and air duct. The air flow noise of turbo-engine is mainly the emission noise emitted from the walls of air intake system. And the transfer path of turbo noise is in order of air intake hose, air cleaner and air duct. Therefore, it is effective to reduce the noise of the air intake hose located at the beginning of noise transfer path.