An intake , or especially for aircraft inlet, is an air intake for an engine. Because the modern internal combustion engine is in essence a powerful air pump, like the exhaust system on an engine, the intake must be carefully engineered and tuned to provide the greatest efficiency and power. An ideal intake system should increase the velocity of the air until it travels in to the combustion chamber, while minimizing turbulence and restriction of flow.Alongside with development of jet-engine, and logical increase in overal speed of the system, it was necessary to achieve such inlet design to perform optimal air flow at any speed, generally, and in other hand - not to suppress work of first stage of compressor (of an jet-engine), by slowing down the speed of air at just under subsonic at entrance to the compressor, keeping the necessary air flow at optimum (for given output power). That led to "inverse droplet" design of air-spike (conus, or semiconus, in some designs) as most common idea under the design of supersonic, and hypersonic inlet.All the above is usually accomplished by flow testing on a flow bench in the port design stage. Cars with turbochargers or superchargers which provide a pressurized intake system, usually have extensive tweaking of the intake system to improve performance dramatically.

A modern air intake system should have three main parts, an air filter, mass flow sensor, and throttle body. Many cars today now include a silencer to minimize the noise entering the cabin. Silencers impede air flow and create turbulence which reduce total power, so many performance enthusiasts often remove them.

Production cars have specific length air intakes to cause the air to vibrate and buffett at a specific frequency to assist air flow in to the combustion chamber. Aftermarket companies for cars have introduced larger throttle bodies and air filters to decrease restriction of flow at the cost of changing the harmonics of the air intake for a small net increase in power or torque.

BMW is unusual in that its M line of performance cars have one throttle body per cylinder, as opposed to one throttle body for four, six or even eight cylinders for regular production cars. This is done to increase flow characteristics and improve throttle response. Nissan also uses this system in their high performance models.

Porsche in the 1980s designed an intake system for their cars that changed the length of the intake system by alternating between a longer and shorter set of tubing using a butterfly valve, creating a small amount of positive pressure which increased overall performance of the engine.

Alfa Romeo used variable-length intake in their 2.0 Twin Spark engines powering the model 156.

ee also

*Cold air intake
*Warm air intake
*Short ram air intake
*Ram-air intake
*Intake ramp

External links

* [ Speed R Us Air Intake]

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Look at other dictionaries:

  • Intake — In take , n. 1. The place where water, air, or other substance is taken into a pipe, conduit, or machine; opposed to {outlet}. [1913 Webster] 2. the beginning of a contraction or narrowing in a tube or cylinder. [1913 Webster] 3. The quantity… …   The Collaborative International Dictionary of English

  • intake — [in′tāk΄] n. 1. the act or process of taking in 2. the amount or thing taken in 3. the place at which a fluid is taken into a pipe, channel, etc. [a sewer intake] 4. a narrowing; an abrupt lessening in breadth 5. Mech. the amount of energy taken… …   English World dictionary

  • intake — index receipt (act of receiving), revenue Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • intake — (n.) c.1800, place where water is taken into a channel or pipe, from IN (Cf. in) + TAKE (Cf. take). Meaning act of taking in (food, breath, etc.) is first attested 1808 …   Etymology dictionary

  • intakė — sf. Rtr žr. antukys …   Dictionary of the Lithuanian Language

  • intake — ► NOUN 1) an amount or quantity taken in. 2) an act of taking in. 3) a location or structure through which something is taken in …   English terms dictionary

  • intake — 01. I had to cut down on my coffee [intake] because I was having trouble sleeping at night. 02. You simply have to reduce your [intake] of fat if you don t want to have another heart attack. 03. An excessive [intake] of alcohol can cause a… …   Grammatical examples in English

  • intake — noun 1 amount of food/drink taken into the body ADJECTIVE ▪ high ▪ moderate ▪ low ▪ increased ▪ total ▪ …   Collocations dictionary

  • intake — in|take [ˈınteık] n 1.) [singular, U] the amount of food, drink etc that you take into your body intake of ▪ Try to reduce your intake of fat. a high/low intake ▪ a high intake of carbohydrates food/alcohol/calorie etc intake ▪ Sickness may… …   Dictionary of contemporary English

  • intake — See air intake cold air intake heated intake intake manifold intake port intake stroke intake tract intake stroke intake valve ram intake manifold …   Dictionary of automotive terms

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