Automotive Technology/Combustion Engine 썸네일형 리스트형 Turbocharger Turbocharger Turbochargers are used to increase engine performance by compressing intake air before it enters the engine combustion chamber. Turbochargers are air pumps driven by the engine’s exhaust gas stream. The heat and pressure of the exhaust gases spin the turbine blades of the pump. In general, piston inside a reciprocating engine moves up and down to intake fresh air and to exhaust gas... 더보기 Spark and Ignition (3) Spark and Ignition (3) The power plant of this high voltage is “Ignition coil” of the system. Normally the ignition coil is covered by engine cover, therefore, you cannot easily see the coil. The ignition coil is small version of voltage transformer which you can find easily on the street to convert electric voltage which comes from power plant. The primary coil has windings of 200 or 300 times .. 더보기 Spark and Ignition (2) Spark and Ignition (2) Imagine a electric wire with 220 Volt electricity flowing it. Now, assume you cut it some point of the wire and keep the gap around 1 mm, then of course the current stops to flow and connected electric devices stop working. The reason that the current stops is the electric resistance of air is much higher than those of copper wire. Then how can we overcome this resistance .. 더보기 Spark and Ignition (1) Spark and Ignition (1) Both of Diesel and Gasoline engine use a cylinder (more precisely, combustion chamber) to generate power to rotate crankshaft. Air and fuel mixture in the combustion chamber burns (or explodes) and the explosion pressure push down the piston connected to crankshaft. The diesel fuel has lower temperature point of ignition than gasoline around 250 deg C, and this temperature.. 더보기 Combustion (2)_Air and Fuel Combustion (2)_Air and Fuel (A/F Ratio) As written in part (1) of combustion, the composition of fuel is hydrocarbon (HC), but the chemical bonding of every kind of HC is different from each other. Depending on the type of bondage of HC, the type of combustion inside combustion chamber will also be decided. The picture below shows a couple of different kind of HC chemical structure. Paraffinic H.. 더보기 Combustion (1)_Heat Generation Combustion (1)_Heat Generation Just like human being the engine need to eat air and fuel to generate rotating power. In case of human being we call the power generation process as “digestion” but in the internal combustion engine case we have named it as “combustion”. Combustion is a kind of chemical reaction/ process which convert or change the structure of a certain material into other format .. 더보기 Intake and Exhaust System Intake and Exhaust System In the boundary of “internal combustion engine” there are something different from those of engines of our cars. An internal combustion engine means a device which burns the fuel for power generation inside of engine, therefore there can be several other forms of internal combustion engines. One of the example is gas turbine which is used for power plant as a bigger for.. 더보기 이전 1 다음
