EPS(Electric Power Steeing) has been a popular system in the automotive industry since 2000 after the technology and safety was validated. The Korean Refrigerated Carts like Hankook Yogurt Coco was developed for the first time in the world. However this carts system and other small tranporting carts has no EPS. Thus the drivers of carts needed a EPS to avoid the burden when steeing a big weighted cart with 750Kgf as many women drivers complain the pain on their shoulders. This paper describes the application of EPS on Korean refrigerated carts with simulation results and experimental data shows the improvement of steering efforts.

In this study, the lower power consumption FET-DC contactor for golf cart and low speed electric vehicle has been designed and developed. Also, the author carrying out many measurements and tests such as an electric power consumption, current consumption, calorific value, size, volume and weight of the DC contactor for the various cases. As a result, the author found that a prototype of the lower power consumption FET-DC contactor can not only reduce calorific value, size, volume and weight but also improve an electric power and current consumption.

A kart is a vehicle without the suspension system and the differential gear. The kart frame as an elastic body plays the role of a spring. By the cornering of a kart, rolling, pitching and twisting motions are induced in the kart frame. Also the slip or noncontact of the wheel and a permanent deformation of the kart frame can be induced. In order to examine closely this phenomenon of the twisting deformation, measurement and analysis on torsion working stress with strain gage and tracking system are needed. According to the measurement result, while steady state driving in a curve in general the torsion working stress of the kart frame will be increased depending on the vehicle velocity, but the kart frame will be not permanent deformed. However, analysis of the torsion working stress in comparison with torsion fatigue limit shows that while unsteady state driving as clash with same drive condition the racing kart frame will be deformed more quickly as the leisure kart frame.

A kart is a vehicle without the suspension system and the differential gear. The kart frame as an elastic body plays the role of a spring. By the cornering of a kart, rolling, pitching and twisting motions are induced in the kart frame. Also the slip or noncontact of the wheel and a permanent deformation of the kart frame can be induced. In order to examine closely this phenomenon, measurement on height-displacements with various sensors and tracking system and analysis on the kart frame twisting characteristics with the rolling and pitching angle are needed. According to the measurement result, while driving in a curve at high speed the kart frame is quite twisted. Analysis on the measurement results shows that a kart used primarily in high speed requires a frame with low torsional stiffness and a frame material with high tensile strength and large elongation.

Kart-Racing which is called a microcosm of F1`s racing is the most basic step in the car racing. A Kart consisting of the very fundamental structure which does not include differential gear and suspension is sampler than a typical car. It is necessary to reduce the Lab time at the Kart-racing`s corner so the research investigate the Kart through check of racing condition and of driving factors about cornering. The study measured to make the kart closely factual condition which was showed the main parameters for more actual decision of kart`s dynamic characteristics and estimated the real-time data from the developed kart whose sensor was installed at all tires and which was pursued through the GPS.