新编汽车专业英语第3版黄汽驰电子课件Unit9PassageA.pptxVIP

Unit Nine　 Electric Vehicles andNatural Gas Vehicles;Passage AElectric Vehicles;Battery electric vehicle (BEV) BEV mainly uses a high-voltage electric motor to drive the car． The electric motor gets its electric power from a high-voltage battery pack which is recharged by plugging into standard 220-volt outlet． BEV is divided into range-extended electric vehicle (RE-EV) and all-electric vehicle (EV).;Range-extended electric vehicle (RE-EV) uses an engine as an on-board range extender to increase its all-electric range (AER). The engine and the generator form a fuel-electric generator set． The engine is connected directly to the generator and is used only when needed to generate electricity to automatically charge the battery． ;Its generator delivers enough power to charge battery quickly and efficiently while driving (see Fig.9-1a). All-electric vehicle (EV) has no internal combustion engine (ICE) at all． It uses a large battery pack to store the electricity that powers the electric motor to move the car． The battery must be recharged by plugging into a power source． Some EVs have on-board chargers．;Others need to be plugged into an external charger (see Fig.9-1b). An EV is a zero-emission vehicle, and its electric motor produces no tailpipe exhaust emissions.;There are many pros and cons about electric vehicles． The electric vehicle is known to have faster acceleration in silence but shorter distance range than conventional cars with engine． They produce zero emission but require long charging time． What is the long-term solution?;Fuel cell electric vehicle (FCEV) FCEV also called FCV (Fuel Cell Vehicle) is considered as the next generation electric vehicle． Unlike a conventional car which runs on gasoline, FCEV combines hydrogen and oxygen to produce electricity used to move the car without emission pollutants and offers quiet cruising just like BEV． In addition, its long driving range is comparable to conventional cars．;Unlike a BEV, FCEV is quickl