Method and device for obtaining oil-injection quantity of engine ejector

Abstract

The invention discloses a method and a device for obtaining oil-injection quantity of an engine ejector. The method comprises the following steps executed in advance: obtaining a previous rotating speed signal of an engine; obtaining a previous rotating speed peak-to-peak value according to the previous rotating speed signal; obtaining previous oil-injection quantity of an ejector corresponding to the previous rotating speed signal; and establishing a correspondence between the rotating speed peak-to-peak value and the oil-injection quantity according to the previous rotating speed peak-to-peak value and the previous oil-injection quantity. When the oil-injection quantity is obtained in real time, the method comprises the following steps: obtaining a present rotating speed signal and obtaining a present rotating speed peak-to-peak value according to the present rotating speed signal, and then confirming the oil-injection quantity corresponding to the present rotating speed peak-to-peak value according to the correspondence between the rotating speed peak-to-peak value and the oil-injection quantity and taking as the present practical oil-injection quantity. According to the technical scheme of the invention, the obtaining delay time and correcting delay time for obtaining the practical oil-injection quantity in real time can be shortened, so that the energy waste caused by the increasing abrasion of an oil-injection hole is reduced.

Description

technical field [0001] The invention relates to the field of engines, in particular to a method and device for acquiring fuel injection quantity of an engine injector. Background technique [0002] At present, energy saving and emission reduction are getting more and more attention from domestic and international communities. Especially for engines, since the current energy consumption of motor vehicles is quite large, reducing unnecessary energy consumption during engine operation has become an important way to achieve energy conservation and emission reduction. [0003] Engine operation is achieved by injecting fuel from the injector and burning it in the cylinder. Among them, the fuel injector sprays fuel outward through the nozzle hole. As the engine service time increases, the nozzle hole of the fuel injector will be worn due to multiple injections; as the wear continues, the nozzle hole will gradually increase. As the nozzle hole becomes larger, the actual fuel inje...

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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a method and device for obtaining the fuel injection quantity of the engine injector, so as to overcome the excessive occupation of single-chip computing resources caused by obtaining the fuel injection quantity of the engine injector in real time through FFT processing in the prior art. The defect of too much and long delay time of acquisition, and then solve the technical problem of untimely correction of the fuel injection quantity and waste of energy when the fuel injection quantity increases

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