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To achieve a mass goal and minimize the bell mouthing phenomenon of Passenger Air Bag Housing which takes place when the air bag is in explosive action and detrimental to the safety of passenger side because excessive canister bell mouthing may distort and crash the top surface of instrument panel, a study on the replacing process of a PAB housing to a different material and process was performed. The explosive action of current steel PAB housing was firstly analized to evaluate the reaction forces transferred through the PAB and find out the adaptable material for replacing process. Due to the properties among the die casting alloys, the AM60B alloy was chosen for our new material for PAB housing. Then, stress analysis by the finite element method was performed for a design modification of magnesium one piece housing.

The idle vibration of steering system should be improved for better N.V.H performance of vehicles. The fundamental solution for the idle vibration is the separation of steering column frequency from resonance of body structure. Therefore, design of high stiffness steering system is very important. In this paper, design process for high stiffness steering system using light weight magnesium alloy and final results improved about 10 dB level are presented.