Method and device for controlling diesel engine start smoke intensity

The invention discloses a method for controlling diesel engine start smoke intensity, which comprises the steps that when a rotating speed of a diesel engine is greater than an ignition speed, start output current I0 of an electronic speed regulator for controlling diesel engine oil supply is read; first judging circulation is entered, and is delay circulation; the delay time is 0.05s; when any one of conditions that a first time value t1 is not greater than a start smoke intensity control parameter T and a real-time rotating speed n is not greater than a numerical value after a diesel engine target rotating speed N minus 50r/min is not satisfied, the judging condition is not satisfied; real-time output current I of the electronic speed regulator is equal to I0+(1.5-I0)*SIN (t1/T*PI/2); as the real-time output current I is output by a sine function regular pattern, an oil supply rate follows the sine function regular pattern; an air fuel ratio is greater than 28; and the smoke intensity during a start course