A prospect for energy and power units of vehicles in the 21st century

摘要

In the 20st century, automobiles contribute to serve fur individual mobility of human. The number of cars in use and population have been increased dramatically. Also inhabitants in cities are increasing now. Vehicle manufacturers need to find solutions for environment and economic growth. This paper describes a prospect for energy demand and power units in the 21st century. It seems that liquid fuel will be still dominant and aorta of energy will be increased by each region. Population growth in cities promotes the increase in variety of energy. Development of future vehicle power units should be synchronized with future energy development.