Talk:Hot bulb engine

From Wikipedia, the free encyclopedia

Differences from a Diesel engine: It should be mentioned that the injection pressure of the fuel is much lower than in a diesel engine. For this reason injection pumps for hot bulb engines could be built while R. Diesel had to use air induction. There is another significant difference: The combustible mixture of fuel and air develops continuously during the comression cycle by evaporation in the hot bulb. The ignition timing is more or less coincidential with the upper dead center, the compression heat is not deciding as comression ratio is not much higher than in an otto (spark ignition)engine. The tractor manufacturer Lanz in germany kept stuck with this engine type and developed it into the direction of a diesel engine by increasing the compression ratio and establishing electrical pre-heating devices in the 1950ies, but finally the market decided against it. Lanz was purchased by John Deere, quickly replacing the old engines by adapted american models.