Special diesel engine smoke intensity control system and control method

Abstract

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 final oil injection quantity of the current calculation period. The invention further discloses a control method of the special diesel engine smoke intensity control system, and the smoke intensity is controlled by controlling the fuel injection quantity. The smoke intensity is effectively reduced, and meanwhile the situation that the smoke intensity is in a smoke intensity control mode for a long time and influences power performance is avoided.

Description

technical field [0001] The invention relates to the technical field of engine smoke control, in particular to a special diesel engine smoke control system and control method. Background technique [0002] When a diesel vehicle is running, there will be obvious black smoke emission. The reason is that the combustion mode of the diesel engine is oxygen-enriched combustion. During stable operation, a high air-fuel ratio can be maintained to facilitate the full combustion of diesel. However, when the vehicle accelerates, compared with diesel injection into the cylinder, the gas entering the cylinder will be hysteresis, and the air density will decrease at high altitudes, not only the intake will be hysteresis, but also the intake volume will be reduced, insufficient intake and intake hysteresis As a result, the mixture in the cylinder becomes rich or uneven, the fuel cannot be fully burned, and soot is generated and discharged. In particular, some special vehicles equipped wit...

AI Technical Summary

Problems solved by technology

However, when the vehicle accelerates, compared with the injection of diesel into the cylinder, the gas entering the cylinder will be hysteresis, and the air density will decrease at high altitudes, not only the intake will be hysteresis, but also the amount of intake air will be reduced, insufficient intake air and intake hysteresis As a result, the mixture in the cylinder becomes rich or uneven, the fuel cannot be fully combusted, and soot is generated and discharged

In particular, some special vehicles equipped with diesel engines operate in a complex operating environment. They operate in high-altitude areas and severe cold areas all year round, and do not install particle capture devices. It can be seen that black smoke emissions will be more obvious.

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