A naturally-aspirated engine (NA - aspiration meaning breathing) refers to an An internal combustion engine is an engine that is powered by the expansion of hot combustion products of fuel directly acting within an engine. A piston internal combustion engine works by burning hydrocarbon or hydrogen fuel that presses on a piston; and a jet engine works as the hot combustion... internal combustion engine (normally Petrol (gasoline in the United States and Canada) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. The term gasoline is the common usage within the oil industry, even within companies that are not American. Often the term mogas (short for motor... petrol or This article is about the fuel. For other uses see diesel (disambiguation). Diesel is a product used as a fuel in a diesel engine invented by Rudolf Diesel, and perfected by Charles F. Kettering. Contents // 1 Petrodiesel 2 Biodiesel 3 Uses 4 See also 5 External links Petrodiesel One can... diesel powered) that is neither Turbocharger Cut-away A turbocharger is a device used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. A key advantage of turbochargers is that they offer a considerable increase in engine power with only a... turbocharged nor For other meanings, see supercharger (disambiguation) A supercharger (sometimes called a blower), a positive displacement or centrifugal pump, is a gas compressor used to pump air into the cylinders of an internal combustion engine. In gasoline engines this is the fuel/air mixture (the charge) when the fuel has been... supercharged. Most A small variety of cars, the most popular kind of automobile. An automobile is a wheeled vehicle that carries its own engine. Different types of automobile include cars, buses, vans and trucks, with cars being the most popular by far. Older terms include horseless carriage and motor car, with motor... automobile engines are naturally-aspirated, though turbochargers and superchargers have enjoyed periods of success, particularly in the late Millennia: 1st millennium - 2nd millennium - 3rd millennium Centuries: 19th century - 20th century - 21st century Decades: 1950s 1960s 1970s - 1980s - 1990s 2000s 2010s Years: 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 Contents // 1 Events and trends 1.1 Technology 1.2 Science 1.3 War, peace and politics... 1980s and the current This article is about the decade starting at the beginning of 2000 and ending at the end of 2009. For the century or millennium starting in 2000, see the links below. Millennia: 2nd millennium - 3rd millennium - 4th millennium Centuries: 20th century - 21st century - 22nd century Decades: 1950s 1960s 1970s 1980s... 2000s era.

Air or fuel-air mixture is forced into the Categories: Stub | Engine technology ... cylinders by natural Atmospheric pressure is the pressure caused by the weight of air above any area in the Earths atmosphere. Standard atmospheric pressure (atm) is discussed in the next section. Air masses are affected by the general atmospheric pressure within the mass, creating areas of high and low pressure. As elevation... atmospheric pressure upon opening of the poppet valve A poppet valve is the type of valve system used in most piston engines, used to seal the intake and exhaust ports. The valve is usually a flat disk of metal with a long rod known as the valve stem out one end. The stem is used to... inlet valve or valves. The pressure within the cylinder is lowered by the action of the piston moving away from the valves (so as to expand the volume available for incoming air). In some cases the lowering of the cylinder pressure is enhanced by a combination of the speed of the exhaust gases leaving the cylinder and the closing of the exhaust valve at the appropriate time. A A Custom Engine swap with a Tuned VTEC engine of a Honda Civic CRX Engine tuning is the modification or design of internal combustion engines to yield more performance, either in terms of power output or economy. It is a popular pastime with amateur mechanics and petrolheads. It has a... tuned exhaust can help with this but generally only works at a narrow range of engine speeds and hence is most useful in very high performance cars, An Airbus A340 of SriLankan Airlines. This is a wide_bodied long_haul aircraft, with _24 Business Class seats and 288 Economy Class seats. A hot air balloon seen from directly below. The burner flame is firing into the envelope Bell 206B Jet Ranger III helicopter This article refers to the tool... aircraft and A helicopter is an aircraft which is lifted and propelled by one or more large horizontal rotors (propellers). Helicopters are classified as rotary-wing aircraft to distinguish them from conventional fixed-wing aircraft. The word helicopter is derived from the Greek words helix (spiral) and pteron (wing). The engine-driven... helicopters. Most NA engines today make use of Variable Length Intake Manifold (VLIM) is an automobile engine manifold technology. As the name implies, VLIM can vary the length of the intake tract of an engine in order to optimize power and torque. A tuned intake can have a light pressurizing effect similar to a low-pressure supercharger. This... Variable Length Intake Manifolds to harness Helmholtz Resonance, which has a mild forced induction effect but is not be considered true forced induction.

Natural aspiration gives less power than either turbo or supercharged engines of similar capacity but is cheaper to produce and generally with better Fuel efficiency, sometimes also referred to as fuel economy and commonly gas mileage in the United States, is a numeric measure often used to describe the amount of fuel consumed with regard to the distance travelled in a transportation vehicle, such as an automobile. The measure is usually expressed in... fuel efficiency. In drag racing, naturally aspirated vehicles are vehicles that don't run a blower, a turbo, nor nitrous oxide.

Many racing series specify NA engines to limit power and speed. Drivers practice for the 2004 Daytona 500 The National Association for Stock Car Auto Racing (NASCAR) was cofounded by William France Sr. and Ed Otto in 1948 in the USA. Officially incorporated on February 21, its purpose was to organize and promote the sport of stock car racing. Contents // 1... NASCAR, Champcar has been the name for the class of cars used in the United States premier open wheel auto racing series for decades. Champ Car is also the official name of the racing series being promoted as the Bridgestone Presents the Champ Car World Series Powered by Ford since early... Indycar, and Cars jockey for position during the 2004 Monaco Grand Prix, one of the nineteen annual Formula One races Articles related to Formula One: History of Formula One Formula One regulations Formula One cars Formula One racing Future of Formula One Lists: Constructors | Grands Prix | Circuits Champions | Drivers | Other People Formula... Formula One are all in this category. Naturally-aspirated engines have been mandated in Cars jockey for position during the 2004 Monaco Grand Prix, one of the nineteen annual Formula One races Articles related to Formula One: History of Formula One Formula One regulations Formula One cars Formula One racing Future of Formula One Lists: Constructors | Grands Prix | Circuits Champions | Drivers | Other People Formula... Formula One since 1989, in order to curb the excessive powers being developed by engines with superchargers or turbochargers.

See also

• The carburetor (or carburettor, carb for short) is a device which mixes air and fuel for an internal_combustion engine. Carburetors are still found in small engines and in older or specialized automobiles such as those designed for stock car racing. However, most cars built since the early 1980s use fuel... Carburetor
• The cylinder head of a BMW In an internal combustion engine, the cylinder head sits atop the cylinders and consists of a platform containing most part of the combustion chamber and the location of the valves and spark plugs. The top half of the cylinder head contains the camshaft in... Cylinder head
• Forced induction is a term used to describe internal combustion engines that are not naturally aspirated. Instead, a gas compressor is added to the air intake, thereby increasing the quantity of air or fuel-air mixture available for combustion. Forced induction can be used to increase the power of an... Forced induction
• Fuel injection is a technology used in internal combustion engines to mix the fuel with air prior to combustion. As in a traditional carburetor, fuel is converted to a fine spray and mixed with air. However, where a traditional carburetor forces the incoming air through a venturi to pull the... Fuel injection
• Turbocharger Cut-away A turbocharger is a device used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. A key advantage of turbochargers is that they offer a considerable increase in engine power with only a... Turbocharger
• For other meanings, see supercharger (disambiguation) A supercharger (sometimes called a blower), a positive displacement or centrifugal pump, is a gas compressor used to pump air into the cylinders of an internal combustion engine. In gasoline engines this is the fuel/air mixture (the charge) when the fuel has been... Supercharger
• Helmholtz Resonance
• Variable Length Intake Manifold (VLIM) is an automobile engine manifold technology. As the name implies, VLIM can vary the length of the intake tract of an engine in order to optimize power and torque. A tuned intake can have a light pressurizing effect similar to a low-pressure supercharger. This... Variable Length Intake Manifold