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Anatomy Of Engine

The Combustion Chamber The heart and lungs of the engine, where air is sucked in and combined with fuel before being tumbled, swirled, compressed, burnt and then released to exhaust. It’s known as the four-stroke Otto cycle. In petrol engines, the spark plug initiates combustion giving a smooth burn that develops pressure, forcing the piston down. However, under high pressure and temperature some petrol fuels can show a tendency to combust spontaneously. This can result in a ‘knocking’ or ‘pinking’ sound as small erratic bursts of combustion occur. As a result, an engine may suffer from depleted performance and in the most severe cases permanent damage can occur. Petrol’s octane rating is a measure of how well the fuel can resist this knocking. “Timing the combustion is critical to effective energy transfer from the burning fuel to the engine. A higher octane quality allows for an earlier spark, which means the piston can be pushed down more effectively and for longer” Fuel Injectors I...

Combustion Engine

Internal Combustion Engine In an internal combustion engine, the working fluid consists of a combustible fluid placed inside a cylinder. Four-stroke Diesel and petrol (gasoline) engines are internal combustion engines. In these engines, the fluid undergoes combustion inside the cylinder and expands. The expansion pushes a piston which is attached to a crankshaft and produces motion. There are small differences in the operating principles between petrol engines and Diesel engines: the petrol engine follows the so-called Otto cycle whereas the Diesel engine follows the Diesel cycle. The Diesel engine also does not use a spark to produce combustion, and it is more efficient than a petrol engine. Gas turbine engines used in aircraft are also a type of internal combustion engine. Here, a compressor takes in air from the atmosphere and compresses it down to high pressures. Fuel is added to pressurized air and ignited. This air moves through a set of turbines, causing them to rotate. Eventual...

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Know the history - 1

Carl Benz Engine The first stationary gasoline engine was developed by Carl Benz it was a one-cylinder two-stroke engine that ran for the first time on New Year’s Eve 1879. Benz had so much commercial success with this engine that after that he devote more time to his dream of creating a lightweight car powered by a gasoline engine, in which the chassis and engine formed a single unit. The major features of the vehicle, which was completed in 1885, were: the compact high-speed single-cylinder four-stroke engine installed horizontally at the rear the tubular steel frame the differential and three wire-spoked wheels. The engine output was 0.75 hp (0.55 kW). It included: automatic intake slide a controlled exhaust valve high-voltage electrical vibrator ignition with spark plug water/Thermo siphon evaporation cooling. The first automobile On January 29, 1886, Carl Benz applied for a patent for his “vehicle powered by a gas engine.” The patent – number 37435 – may be regarded as the...

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