SOHC or DOHC

2010-01-11
Another article here famous articles in this category, we met and learned how to affect the free space created around the plates and the engine valves while opening the effectiveness of the mixture flow in and out as well as how it affects the level of planning and engineering of the engine. And this time, you ask? Well, this time we recognize the two main methods that allow the opening of the valves using a waveproducing.
SOHC The first method is called (SOHC Single Over Head Camshaft), ie a single wave caps Upper controls are on the suction valves and the exhaust valves. Produced pressuring one side of the swing, which tends to as Dnda , pushing the tip at the other end down barrel valve and forces it open.
DOHC Operating system more efficient valve mechanism known nickname Double Over Head Camshaft or short, DOHC. This means the engine timing is done by a pair of surface waves caps installed cast engine head. It is important to mention that the engines primitive were installed in space produce waves crank, turned on the valves through push rods, and therefore emphasize the word OVER. The goal with this is to clarify that the wave of producers is installed on or above the head space crank the engine and, as yet typical American engines.
The word Double came clear that the timing mechanism includes a pair of wavy caps, each of which controls one of the trenches transition; first schedule the opening and closing the suction valves, and the other controls the evacuation of gas in space that was not burned on the cylinder? By opening and closing valves exhaust channel. DOHC geometric arrangement is significantly more efficient, since the wave of producers now installed just above the valves is running, allowing to reduce the number of moving parts and mechanism than self.
Sometimes, though not always, you can forgo the need Vendndim, and activate the valves directly? By the producers themselves. In most modern engines and advanced mechanical aspect, apparatus is equipped with a spacious dog tags (Shimsim) replacement interval adjustment screw valve, allowing to determine the location, valves, more accurately, a material gives lowfrequency system quiet life. Furthermore, when there is no need to nag, saves energy consumed in its operation (Ainrtzih. ..) and this is an essential advantage when the engine is designed to work in a high rpm. What next? Lets wait and see
Right image shows a mechanism for DOHC engine GSX750R from 90. This mechanism is characterized by all either have a double arm that operates a pair of valves at the same time (two suction valves or alternatively two exhaust valves). Left picture you can see valve timing mechanism DOHC Y. Q Y. R. (no Ndndim) combines together timing gears and chain together.