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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, [5] 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 ...
The key difference between a heat shield and insulating the pipe, through either wrapping or thermal coating, is the air gap that exists between the exhaust and the shield. More recently technology has become available to apply ceramic thermal barrier coatings onto flexible aluminium in order to increase the thermal insulatory properties.
The McLaren F1's engine compartment contains the mid-mounted BMW S70/2 engine and uses gold foil as a heat shield in the exhaust compartment. Gordon Murray insisted that the engine for this car be naturally aspirated to increase reliability and driver control.
An exhaust heat recovery system turns waste heat energy in exhaust gases into electric energy for batteries or mechanical energy reintroduced on the crankshaft. The technology is of increasing interest as car and heavy-duty vehicle manufacturers continue to increase efficiency, saving fuel and reducing emissions.
Heater core (arrowed) in the partially disassembled dashboard of a BMW E32. The internal combustion engine in most cars and trucks is cooled by a water and antifreeze mixture that is circulated through the engine and radiator by a water pump to enable the radiator to give off engine heat to the atmosphere. Some of that coolant can be diverted ...
On August 30, 2021, an electric BMW prototype caught fire while parked within the BMW premises in Eching, Germany. Once extinguished by the firefighters, the car reignited and had to be submerged in water. The exact cause is unknown. [181] On October 7, 2021, a BMW i3 caught fire in a parking lot in Chester, United Kingdom. [182]