Abcs Of Rebuilt Detroit Diesel Series 71

The diesel engine is an internal combustion engine, which uses spontaneous ignition when the fuel injection by self-ignition phenomenon is related to high temperatures in combustion chamber. These are achieved through a high compression ratio (compression ratio of 14: 1 to 25: 1) to obtain a temperature of 700-900 degrees C (Rebuilt Detroit Diesel Series 71).

But it is a Danish merchant ship, Selandia, which was the first in 1912. It is equipped to moderate by other considerations, since it is above all submarines that were fitted. Thus, the French engineer Maxime Laubeuf fitted out its a diesel submarine Egret (1901) for gasoline engines while not developed enough power and steam engines, emitting excessive smoke would have been counterproductive, the concern is precisely to develop a discreet building.

Moreover, even if the engine is making significant progress in inter-war period, the steam remains dominant (heating coal being gradually abandoned in favor of heating oil). This is for example the case of Normandie or giant battleships of Second World War (Yamato, Bismarck). It was not until the second half of twentieth century to see diesel spill into sea transport (armed or not).

According to definition above: slow engine, medium speed or fast motor, a motor defined as semi fast to 1000 rev / min can have a run of 450 mm to a linear velocity of piston supposed to 9 m / s. Assuming that cylinder of engine is a square type (stroke equal to bore) is running 450 mm bore and 450 mm per cylinder of 91.225 liters.

Moreover, progress in this area has largely nullified the old dichotomy between the gasoline engine "Zoom-Zoom" and "Daddy Diesel". Performance and tend to balance, diesel has become more athletic and nervous, attractive in recent years acquired a once gasoline customers. However, balancing in terms of performance is also reflected in a balance in terms of cost.

As soon as the fuel injected (sprayed), it almost instantly ignites, without the need to use a spark ignition. Burning the mixture greatly increases the temperature and pressure in cylinder (60 to 100 bars), pushing the piston providing a force working on a connecting rod, which drives the crankshaft rotation (or crank shaft serving as an axis engine, see crank system).

The four-stroke Diesel cycle are: intake air by opening the intake and the descent of piston valve; air compression by the piston rises, the inlet valve being closed. Engine time: shortly before top dead center is introduced by injection, the fuel is mixed with compressed air. The ensuing rapid combustion engine is the time, the hot gases push the piston, releasing part of energy. This can measured by the engine power curve;

The reasons for the success of diesel engine in car, beyond tax benefits depend on political and not technical choices are mainly due to its higher than the gasoline engine efficiency. This performance can further enhanced by the implementation of innovative technologies: Supercharging utilizes a compressor to increase the amount of air (and thus oxygen) introduced into engine, which is particularly appreciable in elevation (and hence in aviation).