Method for evaluating rationality of firing orders of V-type multi-cylinder engine

The invention provides a method for evaluating the rationality of firing orders of a V-type multi-cylinder engine. The method comprises the following steps: (1) determining the structure and the performance parameters of the engine; (2) acquiring test data of an engine bench; (3) establishing a one-dimensional performance simulation model of the engine; (4) calibrating the one-dimensional performance simulation model; (5) arranging the firing orders corresponding to different crankshaft structure types, and inputting the simulation model for simulation iteration; (6) processing a simulation result, and calculating the gas inlet non-uniformity of different firing orders; (7) judging whether the firing orders meet a design requirement according to gas inlet non-uniformity indexes. The method for evaluating the rationality of the firing orders of the V-type multi-cylinder engine has the advantages and the positive effects that the selection advantages and disadvantages of the firing orders can be rationally and comprehensively evaluated, and the disturbance degree of the gas inlet process of each cylinder of the V-type multi-cylinder engine caused by the difference of the firing orders can be better reflected, so that the structural design of a crankshaft and the type design of a gas exhaust system can be better guided.