Flat-4 engine - Revision history

74.167.109.239 at 19:40, 11 December 2008

2008-12-11T19:40:08Z

← Older revision		Revision as of 19:40, 11 December 2008
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	A '''~~Flat~~-4 cylinder engine''' is an engine that is horizontally-opposed with with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. The pistons are usually mounted on the crankshaft such that opposing pistons move back and forth in opposite directions engines are better balanced than other engine types in 4 cylinder configurations. The more common straight-4 configuration suffers from an engine balance problem, causing up-and-down vibrations, which grows worse with increased engine size and power. In general, straight-4s above 2.0 L usually have balance shafts and ones over 3.0 L are not seen in passenger cars. However, the flat-4 does have a less serious secondary imbalance that causes it to rotate back and forth around a vertical axis. This is because the cylinders cannot be directly opposed, but must be offset somewhat so the piston connecting rods can be on separate crank pins, which results in the forces being slightly off-centre. It does not usually require balance shafts, but unlike flat-6 and inline-6 engines, the flat-4 is not a fully balanced configuration.		A '''FlatHead-4 cylinder engine''' is an engine that is horizontally-opposed with with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. The pistons are usually mounted on the crankshaft such that opposing pistons move back and forth in opposite directions engines are better balanced than other engine types in 4 cylinder configurations. The more common straight-4 configuration suffers from an engine balance problem, causing up-and-down vibrations, which grows worse with increased engine size and power. In general, straight-4s above 2.0 L usually have balance shafts and ones over 3.0 L are not seen in passenger cars. However, the flat-4 does have a less serious secondary imbalance that causes it to rotate back and forth around a vertical axis. This is because the cylinders cannot be directly opposed, but must be offset somewhat so the piston connecting rods can be on separate crank pins, which results in the forces being slightly off-centre. It does not usually require balance shafts, but unlike flat-6 and inline-6 engines, the flat-4 is not a fully balanced configuration.

	==See Also==		==See Also==

Red marquis at 07:29, 10 December 2008

2008-12-10T07:29:41Z

← Older revision		Revision as of 07:29, 10 December 2008
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	A '''Flat-4 cylinder engine''' is an engine that is horizontally-opposed with with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. The pistons are usually mounted on the crankshaft such that opposing pistons move back and forth in opposite directions engines are better balanced than other engine types in 4 cylinder configurations. The more common straight-4 configuration suffers from an engine balance problem, causing up-and-down vibrations, which grows worse with increased engine size and power. In general, straight-4s above 2.0 L usually have balance shafts and ones over 3.0 L are not seen in passenger cars. However, the flat-4 does have a less serious secondary imbalance that causes it to rotate back and forth around a vertical axis. This is because the cylinders cannot be directly opposed, but must be offset somewhat so the piston connecting rods can be on separate crank pins, which results in the forces being slightly off-centre. It does not usually require balance shafts, but unlike flat-6 and inline-6 engines, the flat-4 is not a fully balanced configuration.		A '''Flat-4 cylinder engine''' is an engine that is horizontally-opposed with with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. The pistons are usually mounted on the crankshaft such that opposing pistons move back and forth in opposite directions engines are better balanced than other engine types in 4 cylinder configurations. The more common straight-4 configuration suffers from an engine balance problem, causing up-and-down vibrations, which grows worse with increased engine size and power. In general, straight-4s above 2.0 L usually have balance shafts and ones over 3.0 L are not seen in passenger cars. However, the flat-4 does have a less serious secondary imbalance that causes it to rotate back and forth around a vertical axis. This is because the cylinders cannot be directly opposed, but must be offset somewhat so the piston connecting rods can be on separate crank pins, which results in the forces being slightly off-centre. It does not usually require balance shafts, but unlike flat-6 and inline-6 engines, the flat-4 is not a fully balanced configuration.

			==See Also==
			{{Piston engine configurations}}

	[[Category:Engines]]		[[Category:Engines]]

Red marquis at 07:27, 10 December 2008

2008-12-10T07:27:00Z

New page

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A '''Flat-4 cylinder engine''' is an engine that is horizontally-opposed with with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. The pistons are usually mounted on the crankshaft such that opposing pistons move back and forth in opposite directions engines are better balanced than other engine types in 4 cylinder configurations. The more common straight-4 configuration suffers from an engine balance problem, causing up-and-down vibrations, which grows worse with increased engine size and power. In general, straight-4s above 2.0 L usually have balance shafts and ones over 3.0 L are not seen in passenger cars. However, the flat-4 does have a less serious secondary imbalance that causes it to rotate back and forth around a vertical axis. This is because the cylinders cannot be directly opposed, but must be offset somewhat so the piston connecting rods can be on separate crank pins, which results in the forces being slightly off-centre. It does not usually require balance shafts, but unlike flat-6 and inline-6 engines, the flat-4 is not a fully balanced configuration.

[[Category:Engines]]