Invention

时间:2019-03-03 07:17:05166网络整理admin

By Barry Fox KEEP ON RUNNING While electric hybrid vehicles are becoming increasingly popular in the US, the government’s Environmental Protection Agency thinks they are the wrong type. Most drivers are buying hybrids that work using a “parallel” system. In them the wheels are driven by a battery-powered electric motor, and a conventional fuel-burning engine takes over when the battery charge falls too low. The EPA thinks a “series” system is better,