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Overhead camshaft (OHC)
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| Release time：2011.01.05 News source：Taizhou Sannai Camshaft Co.,LTD Browsing number： |
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| Overhead camshaft (OHC)
Camshaft engine mounting position with the next set, center, overhead in three forms.Speed fast car engine because the rpm up to 5,000 rpm or more, to ensure the intake and exhaust efficiency, have adopted the intake valve and exhaust valve in the form upside down, the overhead-valve device,
Such devices are suitable for installation in the form of three camshaft. However, if used in next-mounted or mounted camshaft, valve and camshaft as distance, needs valve tappet and the tappet and other auxiliary parts, resulting in mechanical valve drive more complex, bulky engines, and Under the high-speed operation is also prone to noise, overhead camshaft, you can use to change this phenomenon.Therefore, the modern car engine is generally used overhead camshaft, camshaft configuration will be the top of the engine, shortening the distance between the camshaft and the valve, omitted the valve tappet and the tappet, simplifying the camshaft to the valve between the transmission mechanism, the structure of the engine more compact. More importantly, this installation can reduce the quality of reciprocating motion of the entire system and improve the transmission efficiency.
Number by the number of the camshaft can be divided into single overhead camshaft (SOHC) and double overhead camshaft (DOHC) two, given the generally high-end multi-valve car engines and V-type cylinder arrangement requires the use of dual overhead cam control the inlet and outlet valve respectively, so double overhead camshaft engine used by many brands. |
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