Hood (vehicle)

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Hood (vehicle)

The hood (US) or bonnet (UK) is the hinged cover

Lid (container)

A lid is part of a Packaging and labelling, and serves as the cover or Seal , usually one that completely closes the object.Lids have been found on pottery dating back as far as 3100 BC....
over the engine

Engine

An engine is a mechanical device that produces some form of output from a given input.An engine whose purpose is to produce kinetic energy output from a fuel is called a Wiktionary:prime mover; alternatively, a motor is a device which produces kinetic energy from a preprocessed "fuel" ....
of motor vehicle

Motor vehicle

A motor vehicle is a machine which incorporates a wikt:motor , and which is used for transportation. The internal combustion engine is the most common motor choice, although electric motors or other types are sometimes used....
s that allows access to the engine compartment for maintenance and repair

Auto mechanic

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The hood (US) or bonnet (UK) is the hinged cover

Lid (container)

Engine

Motor vehicle

Auto mechanic

An auto mechanic is a mechanic who specializes in automobile maintenance, repair, and sometimes modification. A mechanic may be knowledgeable in working on all parts of a variety of car makes or may specialize either in a specific area or in a specific make of car....
. In British terminology, hood refers to a fabric cover over the passenger compartment of the car (known as the 'top' in the US). In many motor vehicles built in the 1930s and 1940s, the resemblance to an actual hood or bonnet is clear when open and viewed head-on; in modern vehicles it continues to serve the same purpose but no longer resembles a head covering.

On passenger cars, a hood may be held down by a concealed latch. On race cars or cars with aftermarket hoods (that do not use the factory latch system) the hood may be held down by hood pins. A hood may sometimes contain a hood ornament

Hood ornament

A hood/bonnet ornament or car mascot is a specially crafted model of something which symbolizes a car company like a badge, located on the front center portion of the Hood ....
, hood scoop

Hood scoop

A bonnet/hood scoop is an air vent on the bonnet of an automobile that either allows a flow of air to directly enter the engine compartment, or appears to do so....
, power bulge

Power bulge

A power bulge is a raised part of the Hood of a car. The reason for a power bulge is to fit for instance a large engine or air filters that otherwise would not fit....
, and/or wiper

Windscreen wiper

A windscreen wiper is a device used to wipe rain and dirt from a windscreen. Almost all motor vehicles, trains, aircraft and watercraft are equipped with windscreen wipers, which are usually a legal requirement....
jets. Hoods are typically made out of steel

Steel

Steel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.14% by weight , depending on grade. Carbon is the most cost-effective alloying material for iron, but various other alloying elements are used such as manganese, chromium, vanadium, and tungsten....
, but aluminium

Aluminium

Aluminium or aluminum is a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13....
is rapidly gaining popularity with auto companies. Aftermarket manufacturers may construct hoods out of fiberglass

Fiberglass

Fiberglass, , is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymer or glass-reinforced plastic , is called "fiberglass" in popular usage....
, carbon fiber

Carbon fiber

Carbon fiber or is a material consisting of extremely thin fibers about 0.005?0.010 mm in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in microscopic crystals that are more or less aligned parallel to the long axis of the fiber....
, or dry carbon.

In Japan

Japan

Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, People's Republic of China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south....
and Europe

Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
, regulations have come into effect in recent years that place a limit on the severity of pedestrian head injury when struck by a motor vehicle. This is leading to more advanced hood designs, as evidenced by multicone hood inner panel designs as found on the Mazda RX-8

Mazda RX-8

The Mazda RX-8 is a sports car manufactured by Mazda. It first appeared in 2001 at the North American International Auto Show. It is the successor to the Mazda RX-7 and, like its predecessors in the RX range, it is powered by a Mazda Wankel engine....
and other vehicles. Other changes are being made to use the bonnet / hood as an active structure and push its surface several cm away from the hard motor components during a pedestrian crash. This may be achieved by mechanical (spring force) or pyrotechnic devices.

A recent trend in street racing has been to raise the rear end of the hood to promote cooling, although this, in theory, does little, except at dead stop, since the area of the hood directly in front of the windshield and the lowest portions of the windshield are almost always positive pressure zones (air actually flows into the engine bay, not out of it, increasing engine bay pressure).

Hood (vehicle)

See also