Method for controlling engine to start through starting and electricity generating device

Abstract

The invention relates to a method for controlling an engine to start through a starting and electricity generating device. The method includes the following steps that (A) whether the rotating speed is zero or not after a power source is turned on is judged, and the next step is executed if yes; (B) whether a starting signal of the engine is received or not is judged, and the next step is executed if yes; (C) a motor is directly driven to rotate forwards, whether the rotating speed of the motor is larger than a first preset rotating speed or not is judged, and the next step is executed if yes; (D) the motor is stopped from rotating forwards, and if the rotating speed of the motor is not larger than the first preset rotating speed, the step (C1) that the motor is stopped from rotating forwards, instead, a crankshaft is driven to rotate reversely by an angle or for a certain period of time, and then the step (C) is executed repeatedly; and (E) whether the rotating speed of the motor is smaller than a second preset rotating speed or not is judged, if yes, the engine is in a flameout state, and if not, the engine is still in an electricity generating state. Thus, by means of the same electromechanical structure integrating starting and electricity generating, the starting time of the engine can be shortened effectively.

Description

technical field [0001] The present invention relates to a method for controlling engine starting by a starting and generating device, especially a method suitable for starting a locomotive engine and controlling engine starting by a generating device. Background technique [0002] Currently, an integrated starter generator (Integrated Starter and Generator, hereinafter referred to as ISG) is used in the market to increase the energy-saving effect of the locomotive, and it also has the function of idling stop and restart. Generally, when a locomotive is turned off, the stroke will stop before the compression top dead center. At this time, the ISG needs a large torque to overcome the compression pressure of the engine and start the engine. [0003] The existing method of starting the engine is to reverse the crankshaft to a predetermined position before starting the engine, and then make it start to rotate forward to drive the engine to have a greater inertia, and then overcom...

AI Technical Summary

Problems solved by technology

[0004] The implementation method of the above-mentioned existing ISG architecture has a shortcoming. It is necessary to accurately reverse the crankshaft to the previous compression point before each start, and then add inertia after rotation to generate enough torque to overcome the compression point. The engine starts from The time from starting to ignition takes a long time, which is not very ideal, and there is still room for improvement

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