what is dohc engine

A DOHC engine is a type of piston engine in which there are two camshafts per bank of cylinders. The acronym DOHC stands for Dual Overhead Camshaft, which means that the camshafts are located in the cylinder head above the combustion chamber. DOHC engines are also known as "twin-cam" engines. The main benefit of DOHC engines is that they allow an engine to have four valves per cylinder, with each camshaft operating two of the valves. This configuration allows for a larger portion of the area to be used to let air in and exhaust out, which can result in more power and less waste. DOHC engines are generally higher-performance engines that produce more power and can run at higher speeds. In contrast, SOHC engines have one camshaft per bank of cylinders, while OHV engines have the camshaft located below the combustion chamber in the engine block.