Power and Fuel Economy Details about Diesel Marine Aeronautical Engine

Power and Fuel Economy Diesel Marine and Aeronautical Engine

The MAN S80ME-C7 low speed disel engines use 155 gram fuel per KWh for an overall energy conversion efficiency of 54.4 percent, which is the highest conversation of fuel into power by any internal or external combustion engine. Disel engine are more efficeient than gasoline (petrol) engines of the same power rating in lower fuel consumption . A common margine is 40 percent more miles per gallon for an efficient turbodisel. For example, the current model Skoda Octavia, using Volkswagen Grop engines, has a combined Euro rating of 6.2 L/100 (38 miles per US gallon, 16 Km/L) for the 102 bhp (73 kW) petrol engine and 4.4L/100 Km(54 mpg, 23 km/L) for the 105 bhp (78kW) disel engine.

The avarage disel engine has a poorer power-to-weight ratio than the petrol engine. This is because the diesel must operate at lower engine speeds and because it needs heavier , stronger parts to resist the operating pressure caused by they high compression ratio ot the engine .Disel engine usually haave longer strike lengths in order to achieve the vecessary compression ratios. As a result piston and connecting rods are heavier and more force must be transmitted through the connceted rod.This is another reason that a diesel engine must be stronger for the same power output as a petrol engine .

The increased fuel economy of the disel engine over the petrol engine means that the desel produces less carbon deoxide per unit distance . Recentl advances in production and charge in the political climate have increased the availability and Disel engine have a lower rotaional speed than an equvalent size petrol engine because the disel-air-mixture burns slower than the petrol air mixture into the cylinder to warm the combustion chamber .