If the valve clearance is too large, the opening of the intake valve will be reduced and the opening time will be shortened, causing insufficient inflation, resulting in a decrease in the engine power. At the same time, the opening of the exhaust valve will be reduced, the opening time will be shortened, and the exhaust gas will be poor. As a result, the amount of exhaust gas remaining in the combustion chamber increases, and the economy of the engine deteriorates. In addition, abnormal impact sounds are generated between the transmission members and between the valve and the valve seat. If the valve clearance is too small, the intake valve will not close tightly, the engine may leak in the hot state, resulting in a decrease in engine power, fuel consumption, and sometimes a carburetor tempering; at the same time, exhaust valves Lax close, resulting in reduced engine compression pressure, power, fuel consumption increases, sometimes exhaust pipe muffler and other phenomena.
Hot dip galvanized steel coil, also known as zinc coated steel coil, is a method to obtain metal coating by immersing steel components in molten zinc. In recent years, with the rapid development of high-voltage power transmission, transportation and communication, the protection requirements for steel parts are higher and higher, and the demand for hot-dip galvanizing is also increasing. The forming process of hot dip galvanized layer is the process of forming iron zinc alloy between the iron matrix and the outermost pure zinc layer. The iron zinc alloy layer is formed on the surface of the workpiece during hot dip galvanizing, which makes the iron and pure zinc layer combine well.
The process can be simply described as follows: when the iron workpiece is immersed in molten zinc, the solid melt of zinc and α iron (body core) is formed on the interface first. Hot dip galvanizing has the advantages of long anti-corrosion life and wide adaptability to the environment. It has been a very popular anti-corrosion treatment method. It is widely used in power tower, communication tower, railway, highway protection, street lamp pole, marine components, building steel structure components, substation ancillary facilities, light industry, etc.
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If the valve clearance is too large or too small, it will be detrimental to the engine work. It must be adjusted according to the valve clearance specified by the manufacturer.