Todayâs engines work with different fuels in different ways. Although electric engines get by without any combustion, and thus have a relatively good CO2 balance, their average range is rather limited. In order to change that, intensive research is currently taking place into new batteries. Classical combustion engines have much bigger ranges but are dependent on oil and emit more CO2. In this edition of VIAVISION, you will find out how engines work and about what potential still exists for their optimization. Plus: hybrids in comparison.