Reduced speed method of motorcycle injection type engines

Abstract

The invention relates to a speed reduction method for a jet engine of a motorcycle, comprising the steps of speed reducing, high rotating speed detecting, first controlling, low rotating speed detecting, second controlling and idle speed controlling. The reduction amplitude of the rotating speed of the engine is judged in the first controlling step, and then the fuel oil injection strategy for an electronic control unit is determined, so that when the motorcycle slows down, no excessive fuel oil is injected into the engine, the fuel oil waste is effectively reduced, the exhaust pollution is lowered, and the oil sediment on an exhaust pipe is avoided; in addition, in the second controlling step and the idle speed controlling step, the amount of fuel oil injected to the engine is controlled, the case that engine flameout caused by lack of fuel oil in the process of speed reducing and speed idling is prevented, thus to effectively improve the ride marketability of the motorcycle.

Description

technical field [0001] The invention relates to a deceleration method, in particular to a deceleration method for a jet engine of a motorcycle. technical background [0002] refer to figure 1 , the flow process of the jet engine 11 of a general motorcycle is that the electronic control unit 12 controls an appropriate amount of fuel to be injected into the jet engine 11 through the injection device 15, and becomes oil mist, and is sent out by the electronic control unit 12. The ignition signal controls the ignition device 13 to ignite the oil mist, so that the reciprocating motion of the piston 14 generates power, and the injection engine 11 is actuated. Therefore, some technologies have been commonly used in the industry, so they will not be described again. [0003] refer to figure 2 , when the motorcycle is converted to an idle state at a constant speed, that is to say, the situation of releasing the accelerator (the opening of the accelerator is 0). At this time, the ...

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Problems solved by technology

[0006] However, for this fuel injection method, because the fuel is cut off instantly, there will be no fuel supply in the engine 11 for a period of time. At this time, the engine 11 speed decreases too much, and it may cause a flameout phenomenon when entering idle speed. , so that the commerciality of engine 11 is not good

[0007] Moreover, the same type of electronic control unit 12 can only execute one of the above-mentioned fuel injection strategies, but cannot select the appropriate fuel injection strategy according to the magnitude of the engine 11 rotational speed reduction. Issues such as air pollution and poor commercial performance of motorcycles

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