Double-valve electric control oil injector with variable oil injection law
A technology of fuel injection rules and fuel injectors, which is applied in the field of marine diesel engine fuel systems, and can solve problems such as increasing the difficulty of control
Inactive Publication Date: 2019-01-11
HARBIN ENG UNIV
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Problems solved by technology
For the existing electronically controlled fuel injectors, the realization of the ideal fuel injection law will greatly increase the difficulty of control
Method used
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Embodiment Construction
[0021] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0022] combine Figure 1-5 , the dual-valve electronically controlled fuel injector with variable fuel injection rules of the present invention includes a fuel injector head 1, a boost control valve 2, a boost piston 3, a fuel injection control valve 4, a nozzle 5, a tight cap 6 and a fuel injector The fuel injector body 7, the fuel injector head 1 is installed on the fuel injector body 7, the boost control valve 2, the boost piston 3, the fuel injection control valve 4 and the nozzle 5 are installed on the fuel injector body 7 sequentially from top to bottom Inside, the tight cap 6 is fastened together with the injector body 7 through threads.
[0023] The boost control valve 2 is installed in the fuel injector body 7, and the boost control valve 2 includes a boost control valve reset spring seat 9, a boost control valve iron core 10, a boost control valve armat...
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The invention aims at providing a double-valve electric control oil injector with the variable oil injection law. The double-valve electric control oil injector comprises an oil injection head, a pressurizing control valve, a pressurizing piston, an oil injection control valve, a nozzle, a tightening cap and an oil injector body. Two electromagnetic valves are adopted to control the pressurizing process and the oil injection process, the oil injection process of the double-valve electric control oil injector with the variable oil injection law can be not limited by the pressurizing process, therefore, the oil injection process of the double-valve electric control oil injector with the variable oil injection law can work in two modes including the non-pressurizing mode and the pressurizingmode, rail-pressure injection is conducted in the non-pressurizing mode, ultrahigh-pressure injection is conducted in the pressurizing mode, flexible adjustability of the pressurizing ratio can be achieved by changing the control strategy of the pressurizing control valve in the pressurizing mode, the reliability is higher, and the application range is wider. The oil injection law of being slow firstly and quick secondly can be achieved through a hydraulic compensation piston, the quick oil cut-off advantage is achieved, and the power property and the economical property of a diesel engine areeffectively improved.
Description
technical field [0001] The invention relates to a fuel system, in particular to a marine diesel engine fuel system. Background technique [0002] Diesel engines have a series of advantages such as wide power coverage, high efficiency, and good economy, and have been widely used in many fields. The fuel system is the core part of the diesel engine. After years of development, the diesel engine fuel system has made great progress, and the application of high-pressure common rail technology has achieved a great leap in the history of diesel engine development. However, in order to further save energy consumption and reduce exhaust pollution In response to increasingly stringent emission regulations, the fuel system of diesel engines needs to be further improved and upgraded. [0003] The electronically controlled fuel injector is a key element of the electronically controlled high-pressure common rail system. The current electronically controlled fuel injector can realize prec...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M51/06F02M61/10F02M61/16F02M63/00F02M61/18
CPCF02M51/061F02M61/10F02M61/16F02M61/18F02M63/0017
Inventor 白云兰奇范立云马修真
Owner HARBIN ENG UNIV