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.

The purposes of this study were to investigate the heat transfer and the vibration characteristics caused by front and back vented brake disc which had physically different shapes affecting braking distance. In accordance with the theory of heat transfer the heat transfer rates of two types of brake disc were different and played an important role in the deformation during usage. The single dynamometer was conducted to the experimental work as an engineering tool with boundary conditions according to JASO C406 standard. One degree of freedom (DOF) acceleration signals on the brake caliper were analyzed. The results obviously discovered that the back vented brake disc was able to reduce the vibration up to 43.5% comparing to the front vented brake disc in case of the braking temperature 200C initial breaking speed 50 km/h and the hydraulic pressure of 4 MPa. Besides the hydraulic pressure at 4 MPa generated the maximum vibration. Furthermore the initial braking speed and the braking temperature were also the important factors. Regarding braking distance results the results of the experimental work obviously discovered that the back vented brake disc created braking distance shorter than front vented brake disc. Besides there were important factors as braking temperature hydraulic pressure and initial speed of braking. Especially the high braking temperature caused an increase of deceleration and a decrease of braking distance. Moreover the high hydraulic pressure produced a deduction of braking distance and an increase of deceleration. Finally the initial speed of braking directly varied to the braking distance

The aim of this research is to study the brake proportional affected to vehicle stability. Braking performance and vehicle stability testing are the main of research purposes. Otherwise learning research center and new researcher in automotive engineering are the minor research objectives. The results of research discovered to the braking performance depend on driver behavior. By the minimum deceleration was appeared on the non-proportion in front axle with braking ratio 0:100. In term of vehicle stabilities yaw and pitch moment are normally occur by the driving behavior. But the sideslip is an absolutely effect to vehicle handling. With the braking ratio 100:0 there is the highest risk for controlling a vehicle cause of the wheels were locked-up condition in the rear axle. Therefore the value of the sideslip was exceeded with the criteria. Furthermore these project researches were got the learning research center and the new researcher in automotive engineering field.

This research aims to compare the mechanical properties of materials made from hyacinth pineapple and sugarcane fibers and also to study the feasibility of producing automotive interior parts from natural fibers. The 9 specimens that made from natural fiber such as water hyacinth pineapple leaf fiber sugar can and husk and there are also three different binders: glue polymer and polymer plus hardener were produced. All of specimens were controlled mass and density. The specimens were classified into 2 types: 1) thin type with a size of 3.5x14x1 cm in order to test the flexibility 2) thick type with a size of 6.5x6.5x20 cm for testing the ability to absorb energy. The test results showed that the specimen produced from sugar cane and husk using adhesive bonding able to receive bending stress and modulus of elasticity more than other specimens up to 80.63% and 69.19% respectively. While the ability to absorb energy from work piece made from pineapple leaf fiber and husks using polymer bender was able to absorb energy more than other work pieces 51.58%.

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.