Electric controlling fuel injector
A technology of electronically controlled fuel injection and fuel injection ports, which is applied in the direction of machines/engines, fuel injection devices, engine components, etc., can solve the problems of complex structure, uncompact oil circuit layout, inconvenient engine installation, etc., and achieve volume reduction, The effect of compact structure and simplified structure
Inactive Publication Date: 2004-11-24
汪峰
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Problems solved by technology
The advantage of this kind of electronically controlled fuel injector is: the oil pump and the fuel injector are integrated, and no oil pump is needed to provide fuel pressure to it, but the disadvantage is that the armature and the plunger are two components, the oil circuit layout is not compact, and the structure is complicated. The electronically controlled fuel injector has a large volume and is inconvenient to install on the engine
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[0019] As shown in Figure 1, the electronically controlled fuel injector includes an iron core 1 made of soft magnetic materials, a housing 2, a magnetic sleeve 8, a plunger 5, a coil 3, an oil inlet valve 9, an oil outlet valve 6 and There is a working gap 4 between the fuel injection port 27 and the iron core 1 and the plunger 5 . The outer periphery and top of the plunger 5 is a shell 10 made of soft magnetic material. The iron core 1 , the shell 2 , the magnetic sleeve 8 , the plunger casing 10 and the working gap 4 are sequentially connected to form a closed magnetic circuit surrounding the coil 3 .
[0020] When the driving current acts on the coil 3 through the plug 12 and the lead-out wire 11, the plunger 5 is subjected to an upward electromagnetic force, and when the electromagnetic force overcomes the pre-tightening spring force of the plunger spring 24, the plunger 5 moves upward and simultaneously discharges oil. The valve spool 20 is closed under the action of th...
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The electrically controlled oil atomizer includes iron core of soft magnetic material, casing, magnetically conducting sleeve, plunger, coil, oil inlet valve, oil outlet valve and oil spraying nozzle. There is one work gap between the iron core and plunger. The outer and the top of the plunger is one shell of soft magnetic material. The iron core, the casing, the magnetically conducting sleeve, plunger shell and the work gap are connected successively to constitute one closed magnetic path around the coil. Compared with available technology, the electrically controlled oil atomizer of the present invention has the functions of oil pump and oil atomize, and is small and easy to install and may be used widely in electrically controlled oil spraying system of gasoline engine.
Description
technical field [0001] The invention relates to an electronically controlled fuel injector used in an electronically controlled fuel injection system of an internal combustion engine, in particular to an electronically controlled fuel injector used for fuel injection at an air passage port of a gasoline engine. Background technique [0002] At present, the commonly used electronically controlled fuel injectors in the market, such as the electronically controlled fuel injector produced by Shanghai United Electronics Co., Ltd., function as a solenoid valve. When the coil in the electronically controlled fuel injector is energized, the needle in the fuel injector The valve is pulled away from the valve seat by the armature, and the pressurized fuel is sprayed from the single hole or multi-hole injection port in the injector head. This electronically controlled fuel injector is small in size and easy to install, but it needs a fuel pump with a pressure of 1.5-3.5 bar to supply f...
Claims
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IPC IPC(8): F02M51/06
Inventor 汪峰
Owner 汪峰