Editing Heat shield (section)

===Automotive===
{{unreferenced section|date=August 2014}}
Due to the large amounts of heat given off by internal combustion engines,<ref>{{Cite web |last=Carley |first=Larry |date=2017-06-01 |title=Tempering Horsepower Heat: Keeping Your Cool with Heat-Handling Accessories |url=https://www.enginebuildermag.com/2017/06/tempering-horsepower-heat-keeping-cool-heat-handling-accessories/ |access-date=2023-08-26 |website=Engine Builder Magazine |language=en-US}}</ref> heat shields are used on most engines to protect components and bodywork from heat damage. As well as protection, effective heat shields can give a performance benefit by reducing engine bay temperatures, therefore reducing the temperature of the air entering the engine.<ref>{{Cite web |last=diandra |first=dr |date=2012-04-23 |title=Kansas: Temperature and Horsepower |url=https://buildingspeed.org/2012/04/23/temperature-and-horsepower/ |access-date=2023-08-26 |website=Building Speed |language=en-US}}</ref> Heat shields vary widely in price, but most are easy to fit, usually by stainless steel clips, high temperature tape or specially designed metal cable ties. There are three main types of automotive heat shield:
* [[File:BL Maxi 1750 - 1980 - under-bonnet.jpg|thumb|221x221px|An example of a steel heat shield on a BMW E series engine]]Rigid heat shields have until recently commonly been made from solid steel,<ref>{{Cite web |last=Marketing |first=Elmelin |date=2022-05-23 |title=The evolution of automotive heat insulation |url=https://elmelin.com/the-evolution-of-automotive-heat-insulation/ |access-date=2023-08-26 |website=Elmelin Ltd |language=en-GB}}</ref> but are now often made from aluminum. Some high-end rigid heat shields are made out of either aluminum, gold or composite, with most examples including a ceramic coating to provide a [[thermal barrier]], which improves heat insulation.
* The flexible heat shield are normally made from thin aluminum or gold sheeting, most commonly sold either flat or in a roll. These heat shields are often bent by hand by the installer. High performance flexible heat shields sometimes include extras, such as ceramic insulation applied via [[plasma spraying]]. Another common tactic in flexible heat shields is using exotic composite materials to improve thermal insulation and shave weight. These latest products are commonplace in top-end motorsports such as [[Formula 1]].
* [[File:3S-GTE Gen3 ST205.jpg|left|thumb|An example of an aluminum heat shield on the Toyota Celica ST205]]Textile heat shields, (also known as heat wraps), are used to insulate various exhaust components by trapping the heat emitted by the exhaust inside the exhaust pipe, rather than allowing the immense heat from these components to radiate within the engine bay. These wraps are most common in motorcycle exhaust pipes.
Heat shields are often fitted by both amateur and professional personnel during the optimization phase of [[engine tuning]]. Heat shields are also used to cool engine mount vents. When a vehicle is at higher speed there is enough ram air to cool the under the hood engine compartment, but when the vehicle is moving at lower speeds or climbing a gradient there is a need of insulating the engine heat to get transferred to other parts around it, e.g. Engine Mounts. With the help of proper thermal analysis and use of heat shields, the engine mount vents can be optimized for the best performances.<ref>{{Cite web |url=http://www.fkfs.de/uploads/publikationen/fkfs_kfz_AD_Binner.pdf |title=Archived copy |access-date=2016-01-13 |archive-url=https://web.archive.org/web/20160914221112/http://www.fkfs.de/uploads/publikationen/fkfs_kfz_AD_Binner.pdf |archive-date=2016-09-14 |url-status=dead }}</ref>