Control method of EGR (Exhaust Gas Recirculation) valve

The invention relates to the technical field of electronic control of automobile engines, in particular to a control method of an EGR (exhaust gas recirculation) valve, which comprises the following steps of: acquiring the rotating speed K of an engine and the fuel injection quantity L of the engine, and acquiring an EGR opening degree basic value A0 and an EGR opening degree correction value A1 according to the rotating speed K of the engine and the fuel injection quantity L of the engine; acquiring an environment temperature T1 and a cooling liquid temperature T2, and obtaining a correction coefficient B according to the environment temperature T1 and the cooling liquid temperature T2; and finally, the final EGR opening value A is obtained through calculation, and A = A0 + A1 * B. According to the control method of the EGR valve, the opening degree of the EGR valve is corrected in a combined mode so that the opening degree of the EGR valve can be reduced as much as possible within a reasonable range, it can