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Our new technology, the first technology in the small vehicle industry, achieves the fuel economy improvement due to the electricity through the highly efficient electricity generation and charge by the regenerative braking energy obtained during vehicle decelerating or coasting. The newly developed technologies is the regenerative braking system, which minimizes electricity generation during vehicle driving, while maximizes it during vehicle decelerating or coasting. Regenerative braking is the function to generate electric power using with the regenerative braking energy obtained during vehicle decelerating or coasting through the accelerator pedal released or the brake pedal applied. The kinetic energy from the vehicle in motion is recaptured as the electric power to be used for the electric component operation.

Increased interest in global warming requires rapid improvements in CO2 reduction efforts. The automotive industry is placing high importance on CO2 reduction technologies. Using Lithium-ion (Li-ion) battery pack Stop & Start (S&S) system with combined energy regeneration is an effective technology to reduce CO2 emissions. Power supply storage is very important for the S&S system. High charging acceptance, low weight, and compact size are required. A Li-ion battery is the optimal power supply that meets these requirements. It has high charge acceptance per weight. Furthermore, we developed simple system structure which eliminates the need for the DC-DC converter. By utilizing a Li-ion battery that has voltage characteristics similar to the Pb battery there is no need for a converter to make adjustments between the two power supplies. The Li-ion battery's range of capacity must be managed appropriately as overcharge and overdischarge causes extensive damage to the battery.