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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

Axial Blower 1


With this blower cooling, the heat is transferred to the outside air, this is done by a blower wheel driven directly by the crankshaft past the heat-intense parts. Part of the air should serve the vehicle heating. This kind of the cooling does not appear in todays vehicles any more. Therefore, what is shown here is an example of one of the last (and largest) boxer engines made by VW.


The four-cylinder boxer engine is shown with the flywheel below. The blower wheel extracts the air from above right and left, past the cylinders to the bottom. Well defined cooling fins and deflectors provide for specific heat transfer. On the right in the air exit there is a ribbed-gaiter thermostat which when filled with lighter simmering gas causes an expansion when a certain temperature is reached. When the engine is cold the air supply is thus regulated to the engine by the two red air-flaps on the top. When a certain opening temperature is reached, both are opened by a push rod and the (not shown here) connection. With vehicles the cooling air can not be used for the heating, rather, a part of it must be diverted beforehand and be heated by the counter current of the hot exhaust pipe.

The above figure 2 shows a flat-four cylinder engine with one carburettor on either side, which are operated by a lever/linkage. Above that, is the air filter with a connection to both cylinder banks. The air box, with ribbed-gaiter, for cool air induction is especially prominent. Behind it is the, not so easy to recognise, aluminium casing with air ducts to both cylinder rows. Air is taken in, in each case, on the far outside by two black sheet-metal pipes, rubber connections and clamps, the air is then diverted past the exhaust pipes, into the passenger compartment.               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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