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Video Thermodynamics 1
Video Thermodynamics 2
Video Thermodynamics 3
Video Thermodynamics 4
Video Thermodynamics 5
Video Thermodynamics 6

Video Cooling

Video Add. Information
Video Summary
Video Maintenance
Video Repair
Video How to get engine warm?
Video Air Cooling
Video Air-stream Cooling
Video Air/Liquid Cooling
Video Blower Cooling
Video Axial Blower 1
Video Axial Blower 2
Video Radial Blower
Video Liquid Cooling
Video Cooling Module
Video Radiator
Video Closed Cooling S.
Video Coolant Pump 1
Video Coolant Pump 2
Video Coolant Pump 3
Video Coolant
Video Antifreeze
Video Frost Plug
Video Electr./Hydr. Fan
Video Vacuum Filling
Video Hydrostatic Blower
Video Belt Drive
Video V-belt Drive
Video Fuel Vaporization
Video Thermostat
Video Electronic Cooling 1
Video Electronic Cooling 2
Video Thermosiphon Cooling
Video Visc. Cooling Fan 1
Video Visc. Cooling Fan 2
Video Oil Cooling
Video Heat Exchanger
Video Charge Ait Cooler 1
Video Charge Ait Cooler 2
Video Fuel Cooling

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Cooling by Fuel Vaporization


The internal cooling should achieve, next to the external air cooling or liquid cooling, a special cooling inside the cylinder.

How it works

Fuel absorbs a lot of heat during evaporation. It cools the engine from the inside when it reaches, in the form of a fine liquid spray, the combustion chamber where it evaporates before combustion. A fine example of the effectivity of the internal cooling, is motor-racing sport. In this field one has almost always had the problem of overheating with tuned engines, this was often solved efficiently and simply by enriching the fuel mixture. Dragsters, e.g., generally have neither cooling fins nor a cooling system circuit. They lose a great deal of their excess heat through fuel evaporation.

This example shows even more clearly the enormous significance of the internal cooling:
To vaporise, petrol needs 380-500 kJ/kg. This means, to convert 1 kg of petrol into a gaseous state, 380-500 kJ of energy are needed. If we use aluminium, with a linear, specific caloric capacity of 0.9 J/kg*K as a base. To cool 1 kg of aluminium down by 1C , 0.9kJ are necessary, that makes, with a difference in temperature of 100 C, 90 kJ. So the vaporisation of 1 kg of petrol is sufficient to cool about 5 kg of aluminium down by 100C. 10/09               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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