Quan Guanxue, a teacher of Guangdong college of business and technology, developed a fuel-saving device, which can help save 75 percent or even greater fuel during the starting and acceleration process of an automobile, and meanwhile cut the exhaust emission 75 percent. The device can be applied to cabs, buses and personal cars. Recently, a national patent has been granted to Quan for this device.

Quan said that this invention is based on the conversion between kinetic energy and potential energy. During the stopping and deceleration process, more than 95 percent of kinetic energy can be collected by flat spiral springs. The amount of energy will be converted into potential energy in the starting and acceleration process. Therefore, a car will speed up when idling or in slow speed of revolution.

The experimental apparatus of this device is 2 meters long and weighs more than 100 kilograms. However, with high-quality materials and refined manufacturing process, the length will be reduced to 0.5-0.7 meters, and the weight 50 kilograms or even lighter, according to Quan. This device can be fitted onto the chassis of a car. With a size similar to a muffler, it will not take up any room in a car's engine compartment. As the device is made of common metal materials, it will not be expensive.