Special diesel engine smoke intensity control system and control method

The invention discloses a special diesel engine smoke intensity control system, which comprises a parameter acquisition module, a fuel injection quantity calculation module and a fuel injector. The fuel injection quantity calculation module is used for obtaining a basic fuel injection quantity of a current calculation period according to engine operation parameters; when the smoke intensity control mode is not entered, the basic fuel injection quantity of the current calculation period is directly used as the smoke intensity control fuel quantity of the current calculation period; when the smoke intensity control mode is started, the smoke intensity control oil quantity of the current calculation period is the maximum value of the basic oil injection quantity and the smoke intensity control quit oil quantity of the current calculation period, andthe minimum value of the smoke intensity control oil quantity of the current calculation period and the oil quantity of other control modes are taken to obtain the fi