fuel injection device
A fuel injection device and high-pressure fuel technology, which is applied in the direction of fuel injection devices, charging systems, machines/engines, etc., can solve problems such as inconvenient installation, insufficient compact structure, and reduced mechanical efficiency of the system, and achieve variable fuel injection rate , easy to manufacture and process, easy to achieve the effect
Active Publication Date: 2021-01-15
CHINA FIRST AUTOMOBILE
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Problems solved by technology
For example, the supercharged fuel injection system adopted by Bosch has the problem of a large amount of oil returned by the supercharged fuel injector, which reduces the mechanical efficiency of the system
The double common rail pipe type fuel injection system researched by Mitsubishi has the defects of not compact enough structure and inconvenient installation, and the long distance from the high pressure to the fuel injection nozzle affects the boosting efficiency
Method used
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Embodiment Construction
[0018] The present invention will be further described below in conjunction with specific drawings.
[0019] Such as figure 1 As shown, the fuel injection device of the present invention includes a first high-pressure fuel control valve assembly, a pressure accumulator and a fuel injection nozzle assembly 14;
[0020] The first high-pressure fuel control valve assembly includes a hydraulic switching valve 4 and a first electromagnetic control assembly for controlling the opening and closing of the hydraulic switching valve 4. The valve body of the hydraulic switching valve 4 is provided with an oil inlet hole 3 connected to a common rail pipe , the oil inlet hole 3 communicates with the valve cavity of the hydraulic switching valve 4, and the first high-pressure oil outlet at the lower end of the hydraulic switching valve 4 is connected to the fuel injection nozzle coupler 14 through the first high-pressure oil circuit 16;
[0021] The pressure accumulator includes a pressure...
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The invention relates to a fuel injection device which is characterized in that the fuel injection device comprises a first high-pressure fuel control valve component, a pressure storage device and aninjection nozzle matching part; the first high-pressure fuel control valve component comprises a hydraulic switch valve and a first electromagnetic control component used for controlling the hydraulic switch valve to start or close, and a valve body of the hydraulic switch valve is provided with a fuel inlet connected to a common rail pipe; the fuel inlet communicates with a valve chamber of thehydraulic switch valve, and a first high-pressure fuel outlet at the lower end of the hydraulic switch valve is connected to the injection nozzle matching part through a first high-pressure fuel line;the pressure storage device comprises a pressure storage chamber which is connected to the injection nozzle matching part through a second high-pressure fuel line; and the pressure storage chamber isprovided with a lateral throttling orifice and a relief valve device for limiting the pressure of the pressure storage chamber to second high pressure, and the lateral throttling orifice communicateswith the first high-pressure fuel line for receiving first high-pressure fuel in the first high-pressure fuel line. According to the fuel injection device, the variable fuel injection rate in a single fuel injection process can be achieved, and the fuel injection device is easy to machine and manufacture, compact in structure, and easy to match with a complete machine.
Description
technical field [0001] The invention relates to a fuel injection device, in particular to a fuel injection device capable of realizing two-stage injection pressure in a single injection process, and belongs to the technical field of automobile internal combustion engines. Background technique [0002] The fuel injection device refers to the fuel supply device that directly injects a certain amount of fuel into the cylinder or the intake port by using the fuel injector under a certain pressure. According to the different types of injected fuel, it can be divided into gasoline injection system, diesel injection system, gas fuel injection system, etc. [0003] Most of the fuel injection devices in the prior art have various deficiencies. For example, the supercharged fuel injection system adopted by Bosch has the problem of a large amount of oil returned by the supercharged injector, thereby reducing the mechanical efficiency of the system. The double common rail pipe type fu...
Claims
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IPC IPC(8): F02M47/02F02M63/00
CPCF02M47/02F02M63/0005F02M63/0007F02M63/0017F02M63/0028F02M63/0054
Inventor 黄俊雷超常青胡凯耀徐广兰俞建达杨翔宇汪祥本董庆远
Owner CHINA FIRST AUTOMOBILE