Computer control method for constant power output of diesel engine of diesel locomotive

Abstract

The invention relates to a computer control method for constant power output of a diesel engine of a diesel locomotive. Control steps include: (1) setting a fuel injection quantity reference value of the diesel engine under each rotation speed; (2) converting the fuel injection quantity of the diesel engine under detected real-time rotation speed into a fuel injection quantity feedback signal according to the corresponding reference value; (3) comparing the fuel injection feedback signal with a single control reference value set by software and implementing proportional integral adjustment processing for an error signal; and (4) reducing main generator excitation when the fuel injection quantity feedback signal of the diesel engine is larger than the control reference value and increasing the main generator excitation when the fuel injection quantity feedback signal of the diesel engine is smaller than the control reference value. The power of the diesel engine corresponds to rotation speed of the diesel engine and can fast and stably tracks the rotation speed regardless of fast rising or fast falling of the rotation speed of the diesel engine, so that load of the diesel engine can more reasonably match with the rotation speed, and the diesel engine can always run in the best state under the condition that the power is sufficiently utilized.

Description

technical field [0001] The invention relates to railway locomotive technology, in particular to a computer control method for constant power output of a diesel engine of an internal combustion locomotive. Background technique [0002] At present, the output power of the diesel locomotive diesel engine (that is, the loading power) is divided into two parts: the output power of the main generator and the auxiliary power. The output power of the main generator (that is, the main transmission power) is distributed to each traction motor through the rectifier cabinet. Auxiliary power includes the electric power generated by the auxiliary generator and the mechanical power output by the diesel engine driving the transmission system (the fan power of the diesel engine cooling system and the output power of various fans, etc.). In practical application, the output power setting value of the diesel engine and the auxiliary power setting value are both constant values, so the output ...

AI Technical Summary

Problems solved by technology

Because as the speed of the diesel engine changes too fast, the reference value corresponding to the fuel injection quantity also changes too much, and there is no smooth transition link in the middle

In addition, the microcomputer control system also has problems in the adjustment process of the error between the fuel injection quantity feedback and the reference value: if the response is too fast, there will be power overshoot fluctuations, and if the response is too slow, the power tracking speed will not be timely.

Images