Guide To Rebuilt Detroit Diesel Series 71

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By Christa Jarvis

The diesel-engine is preferably used when there is a need for high torque and good performance: locomotives, boats, trucks, farm tractors, generators, gear auto or public works. From a historical point of view, it is the Navy that is primarily concerned with diesel-engines (Rebuilt Detroit Diesel Series 71). Given the size of first engines, it would seem natural that engineers and naval architects are, before all others interested in this new engine they had instead of hosting.

Glow plugs are often used for better cold starting the engine, increasing temporarily the temperature of a point in combustion chamber. The engine can two times (especially on ships with supercharging and pneumatic injection) or four times. In first engine, the fuel must be pulverized coal, but its combustion engine wore out prematurely, forcing Rudolf Diesel to prefer a liquid fuel.

For this motor, the linear velocity of piston in cylinder at 4000 rev / min is: 88 x 2 (two strokes per motor revolution) = 176 mm or, in meters, 0.176 times 4000, or 704 m / min or 704/60 m / s = 11.7 m / s. The rotational speed of an engine is directly related to stroke of piston (and therefore the engine) and usage.

First designed for transport "heavy" (trucks in particular), the diesel-engine eventually earn a spot in individual or family car, even if the engine "essence" remains majority. In fact, diesel having a larger volume calorific value than petrol and enjoying a slightly more favorable taxation, engines are more economical to pump although more expensive to purchase and the maintenance.

As thermal gasoline engine, the diesel engine comprises sliding pistons in cylinders, closed by a yoke linking the cylinders to intake manifolds and exhaust valves and provided with a controlled camshaft. Its operation is based on self-ignition diesel, heavy fuel oil or crude vegetable oil (biodiesel or other) in air 1:20 cylinder volume (about 35 bar), and the temperature is raised 600 degrees C to 1500 degrees C.

The products of this reaction would summarize the carbon dioxide and water if the fuel contained only oil and if combustion was not complete and accompanied by side reactions. Combustion is exothermic, that is to say it gives off heat. If the fuel consisting entirely of hexadecane is assumed, the internal combustion reaction of diesel engine can described as a first approximation, by the equation of complete combustion hexadecane: hexadecane plus oxygen - carbon dioxide - water is 2.

However, the diesel engine is rarely used on motorcycles and airplanes, including a question-board mass, except that Clerget aircraft were distinguished by a power to weight ratio comparable to that of a gasoline engine, but World War II stopped the development. However, the use of diesel engines in light aircraft, appeared in 1980s began to develop: Cessna L19 equipped with a diesel engine of Renault 25 pushed to 135 hp in 1988, amateur-built aircraft with a Dieselis Isuzu (Opel) 70 hp 19987.

The rotational speeds of diesel engines are very different from one engine to another. Indeed, over the engine, the larger the stroke is great, and the engine is slow. Three classes of motors are defined as follows: Slow engine: less than 200 rev / min, medium-speed engine: between 400 and 1000 rev / min and fast motor: 1000 r / min and more. The upper limit of rotation speed of a motor is determined by the speed of movement of piston in cylinder. It is expressed in m / s.

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