Engine parameter correction method, correction device and correction system

The invention provides an engine parameter correction method, device and system. The correction method comprises the steps that vehicle parameter information of a vehicle is at least received, the vehicle parameter information comprises basic parameter information and/or target parameter information, and the basic parameter information comprises compressor clearance, cylinder sleeve protruding amount, oil sprayer hole protruding amount, valve protruding amount and piston top dead center deviation amount; the target parameter information comprises driving parameter information and target quality information, the driving parameter information comprises accelerator information, vehicle speed information, inclination angle information and acceleration information, and the target quality information comprises fuel quality information, urea quality information and oxynitride information; and the vehicle parameter information is input into the correction model, the corrected fuel injection advance angle, the correct