Dohc, Sohc, Ohv and OHC engines - Modification and Tuning Information

TOP EXCLUSIVE MOTORS (OHC)

The "camshaft-camshaft" of some engines is above or above the cylinder head (that it will be inside the cylinder block). The advantage of this system is that it eliminates the additional weights of the arms and push rods.
This technique, which is thought to be new, was actually applied for the first time in 1898 by Wilkinson Motor Car Company.

TOP VALVE MOTORS (OHV)

In overhead valve engines, the valves are mounted on the cylinder head above the combustion chamber. The camshaft of this type of motors is mounted on the engine block and the valves open and close with pusher rods.

DOHC, SOHC Double Over Head Cam, Single Over Head Cam: Turkish is double eccentric from the top, or single eccentric from the top. These abbreviations, which are encountered in many places where the technical characteristics of the cars pass, are left in English and abbreviations to paint the eyes of those who do not understand the car. Or people who prepare these texts are not aware of what they are. These abbreviations indicate that the valves of the engine are moved by one or two camshafts located above the cylinder. In older cars, the camshaft was located under the cylinders and moved the valves on the top of the cylinder with long levers, for example, as in the 94 model old engine Tofaş Şahin. As an example of a single camshaft engine from above, we can show the engines used in Şahin and other Tofaş-Fiat models since 95. Tipo 2.0 ie model has DOHC, that is, double overhead engine. The difference between SOHC and DOHC is that the first one has two valves and the second one usually has 4 valves. Sometimes top eccentric motors can also have 5 valves.

08.05.2020 13:55	# 1
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TOP EXCLUSIVE MOTORS (OHC) The "camshaft-camshaft" of some engines is above or above the cylinder head (that it will be inside the cylinder block). The advantage of this system is that it eliminates the additional weights of the arms and push rods. This technique, which is thought to be new, was actually applied for the first time in 1898 by Wilkinson Motor Car Company. TOP VALVE MOTORS (OHV) In overhead valve engines, the valves are mounted on the cylinder head above the combustion chamber. The camshaft of this type of motors is mounted on the engine block and the valves open and close with pusher rods. DOHC, SOHC Double Over Head Cam, Single Over Head Cam: Turkish is double eccentric from the top, or single eccentric from the top. These abbreviations, which are encountered in many places where the technical characteristics of the cars pass, are left in English and abbreviations to paint the eyes of those who do not understand the car. Or people who prepare these texts are not aware of what they are. These abbreviations indicate that the valves of the engine are moved by one or two camshafts located above the cylinder. In older cars, the camshaft was located under the cylinders and moved the valves on the top of the cylinder with long levers, for example, as in the 94 model old engine Tofaş Şahin. As an example of a single camshaft engine from above, we can show the engines used in Şahin and other Tofaş-Fiat models since 95. Tipo 2.0 ie model has DOHC, that is, double overhead engine. The difference between SOHC and DOHC is that the first one has two valves and the second one usually has 4 valves. Sometimes top eccentric motors can also have 5 valves.

	Dohc, Sohc, Ohv and OHC engines
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