Vehicle engine Piston information
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Combustion chamber
Engine Combustion chamber A combustion chamber is the part of an engine in which fuel is burned. Internal combustion engine The combustion process increases the internal energy of a gas, which translates into an increase in temperature, pressure, or volume depending on the configuration. In an encl ...
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Compression ratio
Engine Compression ratio The compression ratio of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity. It is a fundamental specification for many common combustion ...
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Connecting rod
Engine Connecting rod In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts linear motion into rotating motion. Connecting rods may also convert rotating motion into linear m ...
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Connecting rod Make size comparison
Connecting rods manufacture size comparison Guide Big End Diameter - Small end diameter - Length Audi S3 / TT 1.8Ltr. 20V Turbo 50.6mm 20mm 144mm A3 2.0Ltr. T FSI 50.6mm 20mm 144mm S2/RS2 / 2.2L 50.6mm 20mm 144mm S4 57.6mm 21mm 154mm RS4 56.8mm 21mm 154mm V8 57.6mm 21mm 154mm Alfa Romeo 1750-2000L ...
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Engine displacement
Engine displacement explained One complete cycle of a four-cylinder, four-stroke engine. The volume displaced is marked in red. Engine displacement is the volume swept by all the pistons inside the cylinders of a reciprocating engine in a single movement from top dead centre (TDC) to bottom dead ce ...
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Piston Hypereutectic
Hypereutectic piston cosworth forged pistons A hypereutectic piston is an internal combustion engine piston cast using a hypereutectic alloy–that is, a metallic alloy which has a composition beyond the eutectic point. Hypereutectic pistons are made of an aluminum alloy which has much more silicon p ...
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Piston Mean speed
Mean piston speed The mean piston speed is the average speed of the piston in a reciprocating engine. It is a function of stroke and RPM. There is a factor of 2 in the equation to account for one stroke to occur in 1/2 of a crank revolution (or alternatively: two strokes per one crank revolution) a ...
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Piston rings
Piston rings Exlained car piston rings Most automotive pistons have three rings: The top two while also controlling oil are primarily for compression sealing (compression rings); the lower ring is for controlling the supply of oil to the liner which lubricates the piston skirt and the compression r ...