Recently the Thai industry has continually grown up and also plays a role to economic growth in the country which affects the many of automotive components to be in the market. While the degeneration and waste of automotive components had increased as well. Therefore a car hood is one of the automotive parts which damage from the accident. Consequently the researchers have created a prototype material to develop into the car hood which made from the husk and water hyacinth. The random mixture of water hyacinth and husk was attempted to more than 3 ingredients. By forming a flat plate with thickness between 1 to 3 millimeters was used as prototype of the car hood material in this research. Thus the mechanical properties such as compressing and bending test were attempted to by the universal testing machine. The results showed that using resin as a binder material (Reinforced resin by water hyacinth and husk) will have the less ability of energy absorption. While using polymers as a binder (Polymer resin by water hyacinth and husk) will have the better ability of energy absorption. The properly mixture between water hyacinth and husk referred to the energy absorbing properties is 50:50 because the least linear stiffness is 1.087 N/mm. Besides the ability of energy absorption is 1612444 J/m3 which is property of this ingredient can reduce the severity of the impact in the event of pedestrians collision in the best.

Nowadays car is one of important factors for the human life whereas critical traffic dramatically effects on risk of accident between cars and pedestrians. Therefore the road accident is the enormous loss of human resources. Regarding this problems the lifted mechanism of vehicle hood was concerned and installed on the vehicle hood simulator to mitigate the severe accident in this project. To achieve this the energy absorption was established to decrease the injury of pedestrians by the gap increase between the bottom edge of hood and the engine valve cover. This solution can increase the ability of energy absorption during an accident moment. There were 8 steps of hood gap in this study to in the experimental works indicated by Head Injury Criterion HIC from head-form. The testing program was referred by Pedestrian Protection Test Procedures in EURO NCAP. From the experimental works the increasing gap between the bottom edge of hood and the engine valve cover tends to decrease the values of HIC. By the lowest of HIC the 4th gap is 18 cm of space representing 90.17 and 208.06 of HIC15 and HIC35 respectively. In consequence of experiment the gap between the bottom edge of hood and the engine valve cover plays a role on the HIC value in which it can mitigate the severe injury of pedestrian on accidental way whereas the lifted up mechanism of hood are ability as conjecture.