valve, valve, is an important member of the engine. The valve function is responsible for the input air into the engine and exhaust gas after combustion.
1. The intake and exhaust valves effect
From the structure of the engine, into intake valve (inlet valve) and an exhaust valve (exhaust valve). The intake valve action is air drawn into the engine, the fuel is mixed with combustion; exhaust valves effect the exhaust gas after combustion is discharged and heat dissipation.
Function valve (Value) is dedicated to input fuel into the engine and exhaust emissions, the conventional engine has only one intake valve per cylinder and one exhaust valve, this design is relatively simple, low cost , easy maintenance, good low speed performance, power drawback is difficult to improve, especially at high speed, low charging efficiency, performance is weak.
2. The structure of intake and exhaust valves
In order to increase intake and exhaust efficiency, and now use more multi-valve technology, it is common for each cylinder four valves are disposed (there are three or five-valve cylinder the design, the same principle, such as the Audi A6 engine), 4-valve cylinder is a total of 16, in the car on the information we often see ldquo; 16Vrdquo; it means a total of 16-valve engine. Such multi-valve structure can be easily formed in a compact combustion chamber, fuel injector arranged in the center, which can make the combustion air mixture more rapid and more uniform, and the weight reduction of the opening degree of each valve properly, the valve opening or closing faster.