Technology Innovation
Term Project
Hybrid Revolution Why HEVs? Why Toyota?
Hao Li, 107484928
Yunsheng Shen, 108799860
2012/12/9
1.1 What is hybrid and how does it work?
Hybrid is a kind of technology that applies to vehicles which enables them to use two or more distinct power sources to move the vehicles. As a branch of hybrid vehicles, hybrid electric vehicles (HEV) are more advanced which combines a conventional internal combustion engine propulsion system with an electric system. As HEV is the major focus of our hybrid revolution studying project, we should first take a look into the operating principle of it.
In general, HEV combines the benefits of gasoline engines and electric motors to provide improved fuel energy. Let me explain it in a simple way, when you are driving a HEV, the gasoline engine provides most of the vehicle’s power, and the electric motor provides additional power while you are accelerating and passing which allows a smaller, more efficient engine to be used. One important reason for HEVs consuming less fuel is that the power for the electric motor is generated from regenerative braking and gasoline engines, so HEVs don’t have to be recharged in an electrical outlet. This means a lot, because the energy for electric motors can be regenerated. Additionally, if an HEV is stopped, such as at a red light, the gasoline engine and electric motor shut off automatically so that the energy may not be wasted in idling. However, the battery energy which converted and stored from electric motor could continue to power auxiliary system when a HEV is stopped, such as air conditioning and dashboard displays. 1.2 How do hybrid cars benefit consumers?
Now as we already got some knowledge about how hybrid cars work and the advantages of it, we should take a deep look to see how the new ways of hybrid cars benefit consumers.
In the case of 2013 Cadillac Escalade hybrid and non-hybrid