Old tractors heaters
A BIT OF HISTORY
THE TRACTOR HAS THE FRENCH CAN BE FOUND IN HEAVY OIL
The origin is attributed to attempts to use of kerosene. This fuel, which is cheaper, certainly, but less volatile than gasoline, required significantly different spray and ignition systems then used in gasoline engines carburetor and ignition system.
Maximilien RINGELMANN, Professor authoritative for agricultural mechanization, distinguished in 1900 three categories of internal combustion engine may be able to use heavy fuel:
-the engines where fuel was introduced into the cylinder, mixed intimately in all the air necessary for combustion as in the engines of our days;
-motors in which they introduced the fuel with only a part of the combustion air. These engines were already a hot ball (uncooled part) in contact with which the fuel finished vaporize while continued the filling of fresh air;
-Finally, the engine where air and fuel were introduced in the cylinder in a manner separated. The latter functioned according to the four-stroke cycle, but there were also a spray connected to the cylinder by a narrow channel that wasn't reminiscent, at least in its layout, the 'hot head' still used in the mid-1950s semi-diesel engines. It is somewhat before 1920 that appears an engine operating according to this last principle, but in two-stroke cycle, crankcase acting as filler in fresh air pump.
Only the last two categories were suitable for the heavy fuel market. Meanwhile, at the turn of the century, had appeared precisely Rudolph DIESEL engines, but due to their large size and their due weight to the required high compression ratio for spontaneous, they could not be used to fixed position or, at best, on larger vessels.
Many achievements equipped the fishing boats and, circa 1921, their scope was extended to agricultural tractors engines. The first to know a great commercial success was the "BULLDOG" engine built by the German LANZ in 1921. But the formula was repeated throughout Europe.
So, we will complete this chapter by deriving to these machines that have replaced the oxen ploughs and that fascinate many followers four-wheeled.
Semi-diesel hot-bulb engine
That is what the ball hot?
It is very thick, generally steel nickel and fixed on the cylinder head, front of the injector. Non-cooled the hot ball has a temperature between 500 ° C and 600 ° C continuously maintained by the engine's combustion.
What is a semi-diesel engine?
After much heated the ball in front of the Lanz, startup is done through the steering wheel. Need to engage on the side of the machine and turn to create the explosion and cause to start. This type of tractor rarely broke down.
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