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Variable valve timing

Index Variable valve timing

In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. [1]

65 relations: Active valve control system, Active valve lift system, Alfa Romeo, Alfa Romeo Spider, Atkinson cycle, Bristol Jupiter, Camless piston engine, Camshaft, Centrifugal governor, Clerget-Blin, Combustion chamber, Corliss Orville Burandt, Corliss steam engine, Cutoff (steam engine), CVTCS, Desmodromic valve, Diesel engine, Eccentric (mechanism), Engine, Fiat Automobiles, Gear, Honda, Honda Civic, Honda CR-X, Honda Integra, Internal combustion engine, Langley Research Center, Lycoming XR-7755, MG Rover Group, Mitsubishi 4N1 engine, Mitsubishi Motors, MIVEC, MultiAir, N-VCT, Nissan, Nissan VVL engine, NOx, Patent, Poppet valve, Porsche, Porsche 968, Radial engine, Reciprocating engine, Roller chain, Rotational speed, S-VT, Steam engine, Stephenson valve gear, Swashplate, Timing belt (camshaft), ..., Trip valve gear, Two-stroke engine, Two-stroke power valve system, Valve, Valvetronic, VANOS, Variable Cam Timing, Variable Valve Control, Variable Valve Event and Lift, Variable valve lift, VarioCam, Volvo Penta, VTEC, VVT-i, Yamaha Motor Company. Expand index (15 more) »

Active valve control system

The active valve control system (AVCS) is an automobile variable valve timing technology used by Subaru.

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Active valve lift system

The I-Active Valve Lift System (i stands for intelligence) or i-AVLS is a valvetrain technology implemented by Subaru in the 2.5L naturally aspirated engines SOHC to improve emissions, efficiency and performance.

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Alfa Romeo

Alfa Romeo Automobiles S.p.A. is a car manufacturer, founded by Frenchman Alexandre Darracq as A.L.F.A. (" Anonima Lombarda Fabbrica Automobili", "Lombard Automobile Factory Company") on 24 June 1910, in Milan.

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Alfa Romeo Spider

The Alfa Romeo Spider (105/115 series) is a roadster produced by the Italian manufacturer Alfa Romeo from 1966 to 1993—with small run of 1994 models for the North American market.

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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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Bristol Jupiter

The Bristol Jupiter was a British nine-cylinder single-row piston radial engine built by the Bristol Aeroplane Company.

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Camless piston engine

A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic actuators instead of conventional cams.

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Camshaft

A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.

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Centrifugal governor

A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the amount of fuel (or working fluid) admitted, so as to maintain a near-constant speed, irrespective of the load or fuel-supply conditions.

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Clerget-Blin

Clerget-Blin (full name being Société Clerget-Blin et Cie) was a French precision engineering company formed in 1913 by the engineer and inventor Pierre Clerget and industrialist Eugène Blin.

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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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Corliss Orville Burandt

Corliss Orville Burandt is an American engineer who invented a system of variable valve timing in automobile engines.

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Corliss steam engine

A Corliss steam engine (or Corliss engine) is a steam engine, fitted with rotary valves and with variable valve timing patented in 1849, invented by and named after the American engineer George Henry Corliss of Providence, Rhode Island.

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Cutoff (steam engine)

In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed.

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CVTCS

Continuous Variable Valve Timing Control, which is known as CVTC or CVTCS, is an automobile variable valve timing technology developed by Nissan, similar to Toyota's VVT-i system.

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Desmodromic valve

A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring.

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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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Eccentric (mechanism)

In mechanical engineering, an eccentric is a circular disk (eccentric sheave) solidly fixed to a rotating axle with its centre offset from that of the axle (hence the word "eccentric", out of the centre).

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Engine

An engine or motor is a machine designed to convert one form of energy into mechanical energy.

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Fiat Automobiles

Fiat Automobiles S.p.A. (originally FIAT, lit) is the largest automobile manufacturer in Italy, a subsidiary of FCA Italy S.p.A., which is part of Fiat Chrysler Automobiles (previously Fiat S.p.A.). Fiat Automobiles was formed in January 2007 when Fiat reorganized its automobile business, and traces its history back to 1899 when the first Fiat automobile, the Fiat 4 HP, was produced.

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Gear

A gear or cogwheel is a rotating machine part having cut like teeth, or cogs, which mesh with another toothed part to transmit torque.

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Honda

is a Japanese public multinational conglomerate corporation primarily known as a manufacturer of automobiles, aircraft, motorcycles, and power equipment.

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Honda Civic

The is a line of cars manufactured by Honda.

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Honda CR-X

The Honda CR-X, originally launched as the Honda Ballade Sports CR-X in Japan, is a front-wheel-drive sport compact car manufactured by Honda between 1983 and 1991.

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Honda Integra

The Honda Integra (sold in some markets as Acura Integra and Rover 416i) is an automobile produced by Japanese automobile manufacturer Honda from 1985 to 2006.

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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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Langley Research Center

Langley Research Center (LaRC or NASA Langley) located in Hampton, Virginia, United States, is the oldest of NASA's field centers.

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Lycoming XR-7755

The Lycoming XR-7755 was the largest piston-driven aircraft engine ever produced, with 36 cylinders totaling about 7,750 in³ (127 L) of displacement and a power output of 5,000 horsepower (3,700 kilowatts).

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MG Rover Group

The MG Rover Group was the last domestically owned mass-production car manufacturer in the British motor industry.

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Mitsubishi 4N1 engine

The Mitsubishi 4N1 engine is a family of all-alloy four-cylinder diesel engines developed by Mitsubishi Motors, produced at the company's powertrain facility in Kyoto, Japan for use in Mitsubishi's small to mid-sized global passenger cars.

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Mitsubishi Motors

is a Japanese multinational automotive manufacturer headquartered in Minato, Tokyo, Japan.

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MIVEC

MIVEC (Mitsubishi Innovative Valve timing Electronic Control system) is the brand name of a variable valve timing (VVT) engine technology developed by Mitsubishi Motors.

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MultiAir

Multiair is a hydraulically-actuated variable valve timing (VVT) engine technology enabling "cylinder by cylinder, stroke by stroke" control of intake air directly via a gasoline engine's inlet valves.

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N-VCT

Nissan Variable Timing control (VTC unlike the title of this article suggests) or Nissan Valve Timing Control System (commonly known as N-VTC, VTC, NVCS or NVTCS) is an automobile variable valve timing technology developed by Nissan.

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Nissan

, usually shortened to Nissan (or; Japanese), is a Japanese multinational automobile manufacturer headquartered in Nishi-ku, Yokohama.

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Nissan VVL engine

Nissan Ecology Oriented Variable Valve Lift and Timing (commonly known as VVL & VVT) is an automobile variable valve timing technology developed by Nissan.

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NOx

In atmospheric chemistry, is a generic term for the nitrogen oxides that are most relevant for air pollution, namely nitric oxide (NO) and nitrogen dioxide.

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Patent

A patent is a set of exclusive rights granted by a sovereign state or intergovernmental organization to an inventor or assignee for a limited period of time in exchange for detailed public disclosure of an invention.

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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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Porsche

Dr.-Ing.

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Porsche 968

The Porsche 968 is a sports car made by Porsche AG from 1992 to 1995.

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Radial engine

The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel.

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Reciprocating engine

A reciprocating engine, also often known as a piston engine, is typically a heat engine (although there are also pneumatic and hydraulic reciprocating engines) that uses one or more reciprocating pistons to convert pressure into a rotating motion.

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Roller chain

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.

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Rotational speed

Rotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), cycles per second (cps), radians per second (rad/s), etc..

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S-VT

S-VT, or Sequential Valve Timing, is an automobile variable valve timing technology developed by Mazda.

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Steam engine

A steam engine is a heat engine that performs mechanical work using steam as its working fluid.

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Stephenson valve gear

The Stephenson valve gear or Stephenson link or shifting link is a simple design of valve gear that was widely used throughout the world for all kinds of steam engines.

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Swashplate

A swashplate (also known as slant disk), invented by Anthony George Maldon Michell in 1917, is a device used in mechanical engineering to translate the motion of a rotating shaft into reciprocating motion, or vice versa.

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Timing belt (camshaft)

A timing belt, timing chain or cambelt is a part of an internal combustion engine that synchronizes the rotation of the crankshaft and the camshaft(s) so that the engine's valves open and close at the proper times during each cylinder's intake and exhaust strokes.

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Trip valve gear

Trip valve mechanisms are a class of steam engine valve gear developed to improve efficiency.

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Two-stroke engine

A two-stroke (or two-cycle) engine is a type of internal combustion engine which completes a power cycle with two strokes (up and down movements) of the piston during only one crankshaft revolution.

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Two-stroke power valve system

The two-stroke power valve system is an improvement to a conventional two-stroke engine that gives a high power output over a wider RPM range.

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Valve

A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.

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Valvetronic

The Valvetronic system is a BMW variable valve lift system which, in combination with variable valve timing, allows infinite adjustment of the intake valve timing and duration.

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VANOS

VANOS is a variable valve timing system used by BMW on various automotive petrol engines since 1992.

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Variable Cam Timing

Variable Camshaft Timing (VCT) is an automobile variable valve timing technology developed by Ford.

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Variable Valve Control

VVC (Variable Valve Control) is an automobile variable valve timing technology developed by Rover and applied to some high performance variants of the company's K Series 1800cc engine.

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Variable Valve Event and Lift

Nissan Variable Valve Event and Lift (commonly abbreviated as "VVEL") is an automobile variable valve timing technology developed by Nissan.

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Variable valve lift

Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions.

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VarioCam

VarioCam is an automobile variable valve timing technology developed by Porsche.

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Volvo Penta

Volvo Penta was founded in 1907 in conjunction with the production of the first marine engine, B1.

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VTEC

VTEC (Variable Valve Timing & Lift Electronic Control) is a system developed by Honda which was said to improve the volumetric efficiency of a four-stroke internal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at low RPM.

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VVT-i

VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota.

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Yamaha Motor Company

is a Japanese manufacturer of motorcycles, marine products such as boats and outboard motors, and other motorized products.

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Redirects here:

CVVT, Continuous cam phasing, Continuous variable cam phasing, Continuous variable valve timing, Continuously variable valve timing, DCVCP, Intake cam phaser, VVT engine, Variable Valve Timing, Variable valve actuation.

References

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

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