Method for controlling engine start by starting and generating device

Abstract

The invention relates to a method for controlling starting of an engine by an integrated starter and generator. The method for controlling starting of the engine by the integrated starter and generator comprises that (A) a power supply of a cell is turned on, after the angle of a crankshaft is read and the state of a decompression device is detected, whether a starting signal exists or not is judged; (B) whether the decompression device is in an opened state is judged, if the decompression device is in the opened state, the next step is executed; if the decompression device is not in the opened state, a step (B1) that whether the angle of the crankshaft ranges from 0 to 360 degrees is judged is executed; if the angle of the crankshaft ranges from 0 to 360 degrees, the next step is executed; if the angle of the crankshaft does not range from 0 to 360 degrees, a step (B2) that the crankshaft is driven to rotate reversely to open the decompression device is executed; (C) a motor is driven to rotate forwards, the starting number of times is accumulated, and whether the engine is started successfully is judged; if the engine is started successfully, the next step is executed; if the engine is not started successfully, a step (C1) that whether the accumulated starting number of times for driving forwards rotating of the motor reaches a predetermined number of times is judged is executed; if the accumulated starting number of times reaches the predetermined number of times, driving is stopped; if the accumulated starting number of times does not reach the predetermined number of times, the step (B) is executed repeatedly; and (D) driving is stopped, and a generating mode is carried out.

Description

technical field [0001] The present invention relates to a method for controlling engine starting by a starter and generating device, especially a method for controlling engine starting by a starting and generating device suitable for locomotive engines. Background technique [0002] At present, there is an integrated starter and generator (Integrated Starter and Generator, hereinafter referred to as ISG) in the market to increase the energy saving effect of the locomotive, and it 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, thereby overc...

AI Technical Summary

Problems solved by technology

[0004] The implementation method of the above-mentioned existing ISG architecture has disadvantages: the crankshaft must be accurately reversed to the previous compression point before each start, and the inertia must be added after the rotation to generate enough torque to overcome the compression point, and the engine starts from It takes a long time until the ignition is not very ideal, there is still room for improvement

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