1. Multi-valve
is a conventional engine with one inlet valve per cylinder and one exhaust valve, the two valves valve mechanism is relatively simple, the manufacturing cost is low, the output power requirements not too high for the stock engine, can be obtained satisfactory performance of engine output power and torque. Large displacement, large power for a multi-valve engine technology. The simplest technique is three-valve multi-valve structure, i.e., a plus intake valve into a row of a two-valve structure basis. In recent years, the world’s major car companies to develop new cars they use a four-valve structure. Four-valve gas distribution mechanism, each of the cylinders have two intake valves and two exhaust valves. Four-valve structure can greatly increase the intake of the engine, exhaust efficiency, most new cars four-valve technology.