Electronic fuel oil jetter

Abstract

The present invention relating to a fuel oil ejecting unit with motor driven includes a fuel inlet device, a fuel driving device and a fuel ejecting device with the working process of fuel inlet-fuel driving-fuel ejecting. The unit has characters as that the fuel driving device includes an operating coil, a back moving coil and a slave device driven by the electromagnetic field of the two coils, of which the magnetic loop formed by operating coil will drive the slave device to let fuel eject out from ejecting device and the magnetic loop formed by back moving coil will make slave device go back at its original position.

Description

technical field [0001] The invention relates to an electric fuel injection device, in particular to an electric fuel injection device driven by an electromagnetic coil. Background technique [0002] Existing electric fuel injection devices can be divided into two categories: one is that the electronic system only controls the opening and closing of the fuel injector, and the injection pressure comes entirely from another mechanical or electric pump system; The system controls the electromagnetic force to regularly drive the plunger pump to generate fuel injection pressure and complete the pulse injection system. The former type of devices, such as the electronic fuel injection system used in ordinary four-stroke gasoline engines and the electronically controlled high-pressure common rail fuel injection system used in high-speed diesel engines (see Chapter 6 of "Internal Combustion Engines" edited by Zhou Longbao, Mechanical Industry Press, Beijing, 1999) , and the latter ty...

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Problems solved by technology

The main problem of the former type of device is that the system is complex and expensive, so it is difficult to apply to cost-constrained engines such as motorcycle engines

The biggest advantage of the latter type of device is that the system is simple and the cost is low. However, in the past this type of device, only a single coil is used to control the positive direction movement of the follower, and the return depends on the spring force, so it is inevitable to make the positive electromagnetic Part of the driving force is used to overcome the resistance of the spring, and the movement of the follower is greatly affected by the spring stiffness and pre-tightening force, so that the maximum operating frequency of the fuel injection system is limited, and the fuel injection pressure is also low, that is, Difficult to apply to engines such as motorcycles with very high speed

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