Editing Engine (section)

==== Advancement ====
The continued use of internal combustion engines in automobiles is partly due to the improvement of engine control systems, such as on-board computers providing engine management processes, and electronically controlled fuel injection. Forced air induction by turbocharging and supercharging have increased the power output of smaller displacement engines that are lighter in weight and more fuel-efficient at normal cruise power. Similar changes have been applied to smaller Diesel engines, giving them almost the same performance characteristics as gasoline engines. This is especially evident with the popularity of smaller diesel engine-propelled cars in Europe.  Diesel engines produce lower [[hydrocarbon]] and {{CO2}} emissions, but greater [[Atmospheric particulate matter|particulate]] and {{NOx|link=yes}} pollution, than gasoline engines.<ref name=Harrison2001>{{Citation |title= Pollution: Causes, Effects and Control |first= Roy M. |last= Harrison |author-link=Roy M. Harrison|edition=4th |publisher= [[Royal Society of Chemistry]] |year= 2001 |isbn= 978-0-85404-621-8 }}</ref> Diesel engines are also 40% more fuel efficient than comparable gasoline engines.<ref name=Harrison2001/>