Engine configuration - Revision history

Red marquis at 16:07, 25 December 2010

2010-12-25T16:07:18Z

← Older revision		Revision as of 16:07, 25 December 2010
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	If there are two camshafts in the cylinder head, (DOHC, double overhead cam)the cams normally bear directly on to the valve stems. This is the usual arrangement for a four-valves-per-cylinder design. This latter arrangement is the most inertia free, allows the most unimpeded gas flows in the engine and is the usual arrangement for high performance automobile engines. It also permits the spark plug to be located in the center of the cylinder head, which promotes better combustion characteristics.		If there are two camshafts in the cylinder head, (DOHC, double overhead cam)the cams normally bear directly on to the valve stems. This is the usual arrangement for a four-valves-per-cylinder design. This latter arrangement is the most inertia free, allows the most unimpeded gas flows in the engine and is the usual arrangement for high performance automobile engines. It also permits the spark plug to be located in the center of the cylinder head, which promotes better combustion characteristics.
	Very large engines eg marine engines can have either extra camshafts or extra lobes on the camshaft to enable the engine to run in either direction.		Very large engines eg marine engines can have either extra camshafts or extra lobes on the camshaft to enable the engine to run in either direction.

			==See Also==

			{{Piston engine configurations}}

			[[Category:Piston engine configurations\|Straight-06]]
			[[Category:Engines\|{{PAGENAME}}]]

GearHead at 12:24, 6 April 2007

2007-04-06T12:24:32Z

← Older revision		Revision as of 12:24, 6 April 2007
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	'''Engine ~~configuration~~''' is an engineering term for the layout of the major components of an [[internal combustion engine]]. These components include [[cylinder (engine)\|cylinder]]s, [[piston]]s, [[crankshaft]] or crankshafts and [[camshaft]] or camshafts.		'''Engine Configuration''' is an engineering term for the layout of the major components of an [[internal combustion engine]]. These components include [[cylinder (engine)\|cylinder]]s, [[piston]]s, [[crankshaft]] or crankshafts and [[camshaft]] or camshafts.

	For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in American English. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.		For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in American English. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.

GearHead at 12:22, 6 April 2007

2007-04-06T12:22:50Z

← Older revision		Revision as of 12:22, 6 April 2007
Line 1:		Line 1:
	'''Engine configuration''' is an engineering term for the layout of the major components of an [[internal combustion engine]]. These components include [[cylinder (engine)\|cylinder]]s, [[piston]]s, [[crankshaft]] or crankshafts and [[camshaft]] or camshafts.		'''Engine configuration''' is an engineering term for the layout of the major components of an [[internal combustion engine]]. These components include [[cylinder (engine)\|cylinder]]s, [[piston]]s, [[crankshaft]] or crankshafts and [[camshaft]] or camshafts.

	For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in [[American English]]. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.		For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in American English. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.

	The standard names for some configurations are historic, arbitrary, or both, with some overlap. For example, the cylinder banks of a 180° V engine do not in any way form a V, but it is regarded as a V engine because of its [[crankshaft]] and big end configuration, which result in performance characteristics similar to a V engine. But it is also considered a [[flat engine]] because of its shape. On the other hand, some [[V-twin]] engines which have none of the typical V engine crankshaft design features and consequent performance characteristics are also regarded as V engines, purely because of their shape. Similarly, the Volkswagen [[VR6 engine]] is a hybrid of the [[V engine]] and the [[straight engine]], and can not be definitively labeled as either.		The standard names for some configurations are historic, arbitrary, or both, with some overlap. For example, the cylinder banks of a 180° V engine do not in any way form a V, but it is regarded as a V engine because of its [[crankshaft]] and big end configuration, which result in performance characteristics similar to a V engine. But it is also considered a [[flat engine]] because of its shape. On the other hand, some [[V-twin]] engines which have none of the typical V engine crankshaft design features and consequent performance characteristics are also regarded as V engines, purely because of their shape. Similarly, the Volkswagen [[VR6 engine]] is a hybrid of the [[V engine]] and the [[straight engine]], and can not be definitively labeled as either.
Line 34:		Line 34:
	If the camshaft is located in the crankcase, a valve train of [[pushrods]] and rockers will be required to operate overhead valves. With the side valve arrangement, the valve stems rested on the camshaft. This is a very simple mechanical arrangement but the gas flows within the cylinder head with the side valve arrangement is very poor.		If the camshaft is located in the crankcase, a valve train of [[pushrods]] and rockers will be required to operate overhead valves. With the side valve arrangement, the valve stems rested on the camshaft. This is a very simple mechanical arrangement but the gas flows within the cylinder head with the side valve arrangement is very poor.
	If the camshaft(s) is/are located in the cylinder head, the valvetrain will be shorter, no pushrods being required. Some single camshaft designs, still have a rocker. This facilates adustment of mechanical clearances.		If the camshaft(s) is/are located in the cylinder head, the valvetrain will be shorter, no pushrods being required. Some single camshaft designs, still have a rocker. This facilates adustment of mechanical clearances.
	If there are two camshafts in the cylinder head, (DOHC, double overhead cam)the cams normally bear directly on to the valve stems. This is the usual arrangement for a four-valves-per-cylinder design. This latter arrangement is the most inertia free, allows the most unimpeded gas flows in the engine and is the usual ~~arrengement~~ for high performance automobile engines. It also permits the spark plug to be located in the ~~centre~~ of the cylinder head, which promotes better combustion characteristics.		If there are two camshafts in the cylinder head, (DOHC, double overhead cam)the cams normally bear directly on to the valve stems. This is the usual arrangement for a four-valves-per-cylinder design. This latter arrangement is the most inertia free, allows the most unimpeded gas flows in the engine and is the usual arrangement for high performance automobile engines. It also permits the spark plug to be located in the center of the cylinder head, which promotes better combustion characteristics.
	Very large engines eg marine engines can have either extra camshafts or extra lobes on the camshaft to enable the engine to run in either direction.		Very large engines eg marine engines can have either extra camshafts or extra lobes on the camshaft to enable the engine to run in either direction.

GearHead: /* Categorization by piston motion */

2007-04-06T12:21:47Z

Categorization by piston motion

← Older revision		Revision as of 12:21, 6 April 2007
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	** [[Straight engine]], with all of the pistons are placed in a single row		** [[Straight engine]], with all of the pistons are placed in a single row
	** [[V engine]], with two banks of cylinders at an angle, most commonly 60 or 90 degrees.		** [[V engine]], with two banks of cylinders at an angle, most commonly 60 or 90 degrees.
	** [[Flat engine]], two banks of cylinders directly opposite each other on either side of the crankshaft.		** Flat engine, two banks of cylinders directly opposite each other on either side of the crankshaft.
	** [[H engine]], two crankshafts.		** [[H engine]], two crankshafts.
	** [[W engine]]. Can be both 3 banks and 4 banks.		** [[W engine]]. Can be both 3 banks and 4 banks.

GearHead at 12:20, 6 April 2007

2007-04-06T12:20:29Z

← Older revision		Revision as of 12:20, 6 April 2007
Line 3:		Line 3:
	For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in [[American English]]. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.		For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in [[American English]]. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine\|milled]] from a single piece of [[casting\|cast]] metal. The locations of the major components are largely determined by the shape of this one component.

	The standard names for some configurations are historic, arbitrary, or both, with some overlap. For example, the cylinder banks of a ~~[[Flat engine\|~~180° V engine]] do not in any way form a V, but it is regarded as a V engine because of its [[crankshaft]] and [[big end]] configuration, which result in performance characteristics similar to a V engine. But it is also considered a [[flat engine]] because of its shape. On the other hand, some [[V-twin]] engines which have none of the typical V engine crankshaft design features and consequent performance characteristics are also regarded as V engines, purely because of their shape. Similarly, the Volkswagen [[VR6 engine]] is a hybrid of the [[V engine]] and the [[straight engine]], and can not be definitively labeled as either.		The standard names for some configurations are historic, arbitrary, or both, with some overlap. For example, the cylinder banks of a 180° V engine do not in any way form a V, but it is regarded as a V engine because of its [[crankshaft]] and big end configuration, which result in performance characteristics similar to a V engine. But it is also considered a [[flat engine]] because of its shape. On the other hand, some [[V-twin]] engines which have none of the typical V engine crankshaft design features and consequent performance characteristics are also regarded as V engines, purely because of their shape. Similarly, the Volkswagen [[VR6 engine]] is a hybrid of the [[V engine]] and the [[straight engine]], and can not be definitively labeled as either.
	The names ''[[W engine]]'' and ''[[Rotary engine (disambiguation)\|rotary engine]]'' have each been used for several unconnected designs. The ''[[H-4]]'' and ''[[H-6]]'' engines produced by [[Subaru]] are not [[H engine]]s at all, but [[boxer engine]]s.		The names ''[[W engine]]'' and ''[[Rotary engine (disambiguation)\|rotary engine]]'' have each been used for several unconnected designs. The ''[[H-4]]'' and ''[[H-6]]'' engines produced by [[Subaru]] are not [[H engine]]s at all, but [[boxer engine]]s.

	==~~Categorisation~~ by piston motion==		==Categorization by piston motion==

	Engine types include:		Engine types include:

GearHead at 12:18, 6 April 2007

2007-04-06T12:18:25Z

New page

'''Engine configuration''' is an engineering term for the layout of the major components of an [[internal combustion engine]]. These components include [[cylinder (engine)|cylinder]]s, [[piston]]s, [[crankshaft]] or crankshafts and [[camshaft]] or camshafts.

For many [[automobile]] engines, the term '''block''' is interchangeable with engine in this context, for example ''V block'' and ''[[V engine]]'' can often be used interchangeably in [[American English]]. This is because the most common forms are all based on a combined [[engine block]] and [[crankcase]] that are [[Milling machine|milled]] from a single piece of [[casting|cast]] metal. The locations of the major components are largely determined by the shape of this one component.

The standard names for some configurations are historic, arbitrary, or both, with some overlap. For example, the cylinder banks of a [[Flat engine|180° V engine]] do not in any way form a V, but it is regarded as a V engine because of its [[crankshaft]] and [[big end]] configuration, which result in performance characteristics similar to a V engine. But it is also considered a [[flat engine]] because of its shape. On the other hand, some [[V-twin]] engines which have none of the typical V engine crankshaft design features and consequent performance characteristics are also regarded as V engines, purely because of their shape. Similarly, the Volkswagen [[VR6 engine]] is a hybrid of the [[V engine]] and the [[straight engine]], and can not be definitively labeled as either.
The names ''[[W engine]]'' and ''[[Rotary engine (disambiguation)|rotary engine]]'' have each been used for several unconnected designs. The ''[[H-4]]'' and ''[[H-6]]'' engines produced by [[Subaru]] are not [[H engine]]s at all, but [[boxer engine]]s.

==Categorisation by piston motion==

Engine types include:
* [[Single cylinder engine]]s
* [[Inline engine]] designs:
** [[Straight engine]], with all of the pistons are placed in a single row
** [[V engine]], with two banks of cylinders at an angle, most commonly 60 or 90 degrees.
** [[Flat engine]], two banks of cylinders directly opposite each other on either side of the crankshaft.
** [[H engine]], two crankshafts.
** [[W engine]]. Can be both 3 banks and 4 banks.
** [[Square engine]].
** [[Opposed piston engine]], with multiple crankshafts, an example being:
*** [[Delta engine]]s, with three banks of cylinders and three crankshafts
** [[U engine]], two separate straight engines with crankshafts linked by a central gear.
** [[X engine]].

* [[Radial engine|Radial]] designs, including most:
** [[Rotary engine]] designs.

* [[Pistonless rotary engine]]s, notably:
** [[Wankel engine]].

==Other categorizations==
The majority of four stroke engines have poppet valves although some aircraft engines had sleeve valves. Valves may be located in the cylinder block (side valves) or in the cylinder head (overhead valves). Modern engines are invariably of the latter design. There may be two, three or four valves per cylinder. ie exhaust and inlet valves.

Poppet valves are opened by means of a camshaft which revolves at half the crankshaft speed. This can be either chain, gear or toothed belt driven from the crankshaft and can be located in the crankcase (where it may serve one or more bank of cylinders) or in the cylinder head. There may be one or two camshafts in a cylinder head.
If the camshaft is located in the crankcase, a valve train of [[pushrods]] and rockers will be required to operate overhead valves. With the side valve arrangement, the valve stems rested on the camshaft. This is a very simple mechanical arrangement but the gas flows within the cylinder head with the side valve arrangement is very poor.
If the camshaft(s) is/are located in the cylinder head, the valvetrain will be shorter, no pushrods being required. Some single camshaft designs, still have a rocker. This facilates adustment of mechanical clearances.
If there are two camshafts in the cylinder head, (DOHC, double overhead cam)the cams normally bear directly on to the valve stems. This is the usual arrangement for a four-valves-per-cylinder design. This latter arrangement is the most inertia free, allows the most unimpeded gas flows in the engine and is the usual arrengement for high performance automobile engines. It also permits the spark plug to be located in the centre of the cylinder head, which promotes better combustion characteristics.
Very large engines eg marine engines can have either extra camshafts or extra lobes on the camshaft to enable the engine to run in either direction.