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. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket. In most engines, the head also provides space for the passages that feed air and fuel to the cylinder, and that allow the exhaust to escape. The head can also be a place to mount the valves, spark plugs, and fuel injectors.

In a flathead or sidevalve engine, the mechanical parts of the valve train are all contained within the block, and the head is essentially a metal plate bolted to the top of the block; this simplification avoids the use of moving parts in the head and eases manufacture and repair, and accounts for the flathead engine's early success in production automobiles and continued success in small engines, such as lawnmowers. This design, however, requires the incoming air to flow through a convoluted path, which limits the ability of the engine to perform at higher revolutions per minute (rpm), leading to the adoption of the overhead valve (OHV) head design, and the subsequent overhead camshaft (OHC) design.

Read more about Cylinder HeadDetail, Implementation, Gallery

Other articles related to "cylinder head, cylinder, head":

Mitsubishi 6B3 Engine - 6B31 - Characteristics
... and also optimizing the intake/exhaust-ports in the cylinder head, and employing a variable intake manifold ... The third strategy was to improve anti-knocking performance by more efficient cooling of the cylinder head/combustion chambers ... engine were reduced by the following means optimization of intake/exhaust port design in the cylinder head improvement in mixture charging efficiency and combustion stability by using the ...
Cylinder Head - Gallery
... A cylinder head sliced in half showing the intake and exhaust valves, intake and exhaust ports, coolant passages, cams, tappets and valve springs A single overhead camshaft (SOHC) cylinder ... Hole in the middle for the spark plug, four holes for the cylinder bolt posts Overhead view of an air-cooled cylinder head from a Suzuki GS550 showing dual camshafts, drive sprockets and ...
Suzuki GT550 - Unique Features - Ram Air System
... of the 550 (and its 380 brother) was its Ram-air cooling system for the one piece cylinder head ... had been used with some success on its 500cc two stroke twin cylinder racer, the T500 ... This system consisted of a two piece aluminum shroud bolted to the cylinder head to duct ambient air over the cylinder head finning ...
Reverse-flow Cylinder Head
... In engine technology, a reverse-flow or non-crossflow cylinder head is one that locates the intake and exhaust ports on the same side of the engine ... The gases can be thought to enter the cylinder head and then change direction in order to exit the head ... This is in contrast to the crossflow cylinder head design ...
Mitsubishi 4A9 Engine - Engine Family Characteristics
... and other measures (including optimized shaping of the intake and exhaust manifolds and cylinder head) were used to promote intake and exhaust ... Optimally shaped cooling passages in the cylinder head and optimal control of the flow of coolant into the cylinder head help to suppress engine ... With regard to materials, the cylinder block is made of aluminum the cylinder-head cover and intake manifold are made of plastic the exhaust manifold ...

Famous quotes containing the words head and/or cylinder:

    He wouldn’t ask to go to the head if he had the runs.
    Robert Towne (b. 1936)

    The outline of the city became frantic in its effort to explain something that defied meaning. Power seemed to have outgrown its servitude and to have asserted its freedom. The cylinder had exploded, and thrown great masses of stone and steam against the sky.
    Henry Brooks Adams (1838–1918)