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Compression ratio

Index Compression ratio

The static 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. [1]

60 relations: Adiabatic process, Air–fuel ratio, Atkinson cycle, Autogas, Autoignition temperature, Bar (unit), Bore (engine), Combustion chamber, Compressed natural gas, Compressor, Connecting rod, Cylinder (engine), Cylinder block, Cylinder head, Dead centre (engineering), Diesel engine, Electronic control unit, Engine knocking, Ethanol fuel, Experiment, External combustion engine, Ferguson TE20, Ferrari 458, Fuel injection, Gasket, Gasoline, Heat capacity ratio, Heat engine, Indirect injection, Internal combustion engine, Kerosene, Leak-down tester, Mazda, Mean effective pressure, Methanol, Michael May (racing driver), Octane rating, Oil pump (internal combustion engine), Operating temperature, Overall pressure ratio, Petrol-paraffin engine, Piston, Piston ring, Poppet valve, Pounds per square inch, Pressure, Pressure measurement, Ratio, Saab Automobile, Saab Variable Compression engine, ..., Sensor, SkyActiv, Spark plug, Stroke (engine), Supercharger, Tetraethyllead, Thermal efficiency, Tractor vaporising oil, Turbocharger, Variable compression ratio. Expand index (10 more) »

Adiabatic process

In thermodynamics, an adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings.

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Air–fuel ratio

Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process.

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Atkinson cycle

The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882.

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Autogas

Autogas is the common name for liquefied petroleum gas (LPG) when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators.

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Autoignition temperature

The autoignition temperature or kindling point of a substance is the lowest temperature at which it spontaneously ignites in normal atmosphere without an external source of ignition, such as a flame or spark.

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Bar (unit)

The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI).

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Bore (engine)

The bore or cylinder bore is a part of a piston engine.

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Combustion chamber

A combustion chamber is that part of an internal combustion engine (ICE) in which the fuel/air mix is burned.

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Compressed natural gas

Compressed natural gas (CNG) (methane stored at high pressure) is a fuel which can be used in place of gasoline (petrol), Diesel fuel and propane/LPG.

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Compressor

A compressor is a mechanical device that increases the pressure of a gas by reducing its volume.

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Connecting rod

A connecting rod is a shaft which connects a piston to a crank or crankshaft in a reciprocating engine.

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Cylinder (engine)

A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels.

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Cylinder block

The cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine and often some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase).

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Cylinder head

In an internal combustion engine, the cylinder head (often informally abbreviated to just head) sits above the cylinders on top of the cylinder block.

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Dead centre (engineering)

In a reciprocating engine, the dead centre is the position of a piston in which it is farthest from, or nearest to, the crankshaft.

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Diesel engine

The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel which is injected into the combustion chamber is caused by the elevated temperature of the air in the cylinder due to mechanical compression (adiabatic compression).

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Electronic control unit

An Electronic Control Unit (ECU) is any embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a vehicle.

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Engine knocking

Knocking (also knock,, spark knock, pinging or pinking) in spark-ignition internal combustion engines occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.

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Ethanol fuel

Ethanol fuel is ethyl alcohol, the same type of alcohol found in alcoholic beverages, used as fuel.

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Experiment

An experiment is a procedure carried out to support, refute, or validate a hypothesis.

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External combustion engine

An external combustion engine (EC engine) is a heat engine where a working fluid, contained internally, is heated by combustion in an external source, through the engine wall or a heat exchanger.

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Ferguson TE20

The Ferguson TE20 is an agricultural tractor designed by Harry Ferguson.

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Ferrari 458

The Ferrari 458 Italia is a mid-engined sports car produced by the Italian sports car manufacturer Ferrari.

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Fuel injection

Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector.

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Gasket

gasket A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression.

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Gasoline

Gasoline (American English), or petrol (British English), is a transparent, petroleum-derived liquid that is used primarily as a fuel in spark-ignited internal combustion engines.

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Heat capacity ratio

In thermal physics and thermodynamics, the heat capacity ratio or adiabatic index or ratio of specific heats or Poisson constant, is the ratio of the heat capacity at constant pressure to heat capacity at constant volume.

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Heat engine

In thermodynamics, a heat engine is a system that converts heat or thermal energy—and chemical energy—to mechanical energy, which can then be used to do mechanical work.

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Indirect injection

Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber.

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Internal combustion engine

An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.

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Kerosene

Kerosene, also known as paraffin, lamp oil, and coal oil (an obsolete term), is a combustible hydrocarbon liquid which is derived from petroleum.

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Leak-down tester

A leak-down tester is a measuring instrument used to determine the condition of internal combustion engines by introducing compressed air into the cylinder and measuring the rate at which it leaks out.

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Mazda

, commonly referred to as simply Mazda, is a Japanese multinational automaker based in Fuchū, Aki District, Hiroshima Prefecture, Japan.

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Mean effective pressure

The mean effective pressure is a quantity relating to the operation of a reciprocating engines and is a valuable measure of an engine's capacity to do work that is independent of engine displacement.

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Methanol

Methanol, also known as methyl alcohol among others, is a chemical with the formula CH3OH (a methyl group linked to a hydroxyl group, often abbreviated MeOH).

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Michael May (racing driver)

Michael May (born 18 August 1934 in Stuttgart, Germany) is a former racing driver from Switzerland.

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Octane rating

An octane rating, or octane number, is a standard measure of the performance of an engine or aviation fuel.

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Oil pump (internal combustion engine)

The oil pump in an internal combustion engine circulates engine oil under pressure to the rotating bearings, the sliding pistons and the camshaft of the engine.

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Operating temperature

An operating temperature is the temperature at which an electrical or mechanical device operates.

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Overall pressure ratio

In aeronautical engineering, overall pressure ratio, or overall compression ratio, is the ratio of the stagnation pressure as measured at the front and rear of the compressor of a gas turbine engine.

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Petrol-paraffin engine

A petrol-paraffin engine (United Kingdom) or gasoline-kerosene engine (North America) is an old-fashioned type of dual-fuel internal combustion engine with spark-ignition, designed to start on petrol (gasoline) and then to switch to run on paraffin (kerosene) once the engine is warm.

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Piston

A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms.

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Piston ring

A piston ring is a split ring that fits into a groove on the outer diameter of a piston in a reciprocating engine such as an internal combustion engine or steam engine.

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Poppet valve

A poppet valve (also called mushroom valve) is a valve typically used to control the timing and quantity of gas or vapour flow into an engine.

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Pounds per square inch

The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2; abbreviation: psi) is a unit of pressure or of stress based on avoirdupois units.

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Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

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Pressure measurement

Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface.

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Ratio

In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.

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Saab Automobile

Saab Automobile AB was a manufacturer of automobiles that was founded in Sweden in 1945 when its parent company, SAAB AB, began a project to design a small automobile.

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Saab Variable Compression engine

The Saab Variable Compression engine was a development project of Saab Automobile, for which it won an award both in 2000 and 2001.

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Sensor

In the broadest definition, a sensor is a device, module, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor.

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SkyActiv

SKYACTIV is a brand name for a series of technologies developed by Mazda which increase fuel efficiency and engine output.

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Spark plug

A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.

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Stroke (engine)

In the context of an Internal combustion engine, the term stroke has the following related meanings.

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Supercharger

A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine.

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Tetraethyllead

Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula (CH3CH2)4Pb.

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Thermal efficiency

In thermodynamics, the thermal efficiency (\eta_ \) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, a steam turbine or a steam engine, a boiler, furnace, or a refrigerator for example.

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Tractor vaporising oil

Tractor vaporising oil (or TVO) is a fuel for petrol-paraffin engines.

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Turbocharger

A turbocharger, or colloquially turbo, is a turbine-driven forced induction device that increases an internal combustion engine's efficiency and power output by forcing extra air into the combustion chamber.

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Variable compression ratio

Variable compression ratio is a technology to adjust the compression ratio of an internal combustion engine while the engine is in operation.

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References

[1] https://en.wikipedia.org/wiki/Compression_ratio

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