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V6 Engines and the Inline configuration: The Panagora Blog
V6 Engines and the Inline configuration: The Panagora Blog
The V-6 is not
inherently balanced. It requires expressive and heavy counter rotating balance
shafts to approach (but still not equal) the smoothness of an inline six. Most
V-6 engines are made in 90° configuration because most passenger cars do not
have adequate room for a 120° configuration and 30° would require a block
nearly as long as an inline to separate the cylinders. In order have evenly
spaced cylinder firings on a 90° V-6, the crankshaft cannot have two connecting
rods on a single throw of the crank unless that throw is machined to have two
differently timed bearing centers, adding to the expense and complicity.
General Motors did have a V-6 120° truck engine back in the ‘60s, but it was
BIG.
If equipped with
overhead cams, the V engine is very wide, and takes up a lot of limited under
hood space. The biggest advantage to a V-6, is in autos with engines set in
cross ways because they are shorter than inline sixes, and they fit with
transmission in normal width cars. Although there are exceptions, most modern
V-6 engines are built for front wheel drive cars, where the short length
justifies the greater expense and complication compared to inline sixes while
delivering less pronounce pulses in power flow than a four cylinder.
In other cases you can
find V-6 engines in vehicles where they are used mostly because they are made
with the same tooling as the front drive engines and using common tooling and
parts saves money. In these cases the V-6 is often used because the surface
area to displacement is lower that a V-8, therefore losing less energy to the
cooling system.
Heat losses to the
cooling system and down the exhaust are the two greatest causes of wasted fuel
efficiency.
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