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An on-line measurement system and on-line measurement method of fuel injection law suitable for multiple injection strategy of diesel engine fuel system

A technology of fuel system and fuel injection law, which is applied in the field of diesel engine fuel system testing and control, can solve problems such as fuel injection law distortion, fuel injection quantity fluctuation, complex offline calibration process of fuel injectors, etc., to achieve extended service time, accurate calculated effect

Active Publication Date: 2022-05-27
HARBIN ENG UNIV
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Problems solved by technology

[0007] The invention provides an online measurement system and online measurement method of fuel injection law applicable to multiple injection strategies of a diesel fuel system, aiming at the problems of fluctuations in fuel injection quantity and distortion of fuel injection law in the process of multiple injections, and avoiding the problem of fuel injection complex offline calibration process

Method used

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  • An on-line measurement system and on-line measurement method of fuel injection law suitable for multiple injection strategy of diesel engine fuel system
  • An on-line measurement system and on-line measurement method of fuel injection law suitable for multiple injection strategy of diesel engine fuel system
  • An on-line measurement system and on-line measurement method of fuel injection law suitable for multiple injection strategy of diesel engine fuel system

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Embodiment Construction

[0076] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0077] like image 3 As shown in the figure, an online measurement system of fuel injection law suitable for multiple injection strategies of diesel engine fuel system, the experimental device in step 1 includes fuel injector 1, pressure sensor 2, data acquisition card 3, fuel inlet branch pipe 4, common Oil pipe 5, diesel pump 6, diesel tank 7, data collector 8, charge amplifier 9, impact force sensor 10, impact force sensor bracket ...

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Abstract

The invention discloses an on-line measurement method of fuel injection law applicable to multiple injection strategies of a diesel engine fuel system and the on-line measurement method. Step 1: collect the water hammer pressure signal of the fuel injector inlet through the experimental device; Step 2: calculate the fuel sound velocity based on the water hammer pressure signal of the fuel injector inlet in step 1 and the principle of pressure wave reflection; Step 3: based on The sound velocity of fuel oil in step 2 and the hydroelectric simulation method simulate the pressure oscillation of the pre-injection water hammer to obtain the analog signal of the pre-injection water hammer oscillation; The measured water hammer pressure signal is decoupled to obtain the fuel pressure fluctuation signal generated by the main injection process; step 5: calculate the fuel injection law based on the decoupled fuel pressure fluctuation signal in step 4, and realize the fuel injection law online Measurement. The invention aims at the bottleneck problem to be solved urgently that the precise control of the fuel injection process is in the process of multiple injections.

Description

technical field [0001] The invention belongs to the field of diesel engine fuel system testing and control, and in particular relates to an on-line measuring system and on-line measuring method of fuel injection law suitable for multiple injection strategies of diesel engine fuel system. Background technique [0002] With the increasingly severe energy crisis and environmental problems, diesel engines are gradually developing in the direction of intelligence, green and high efficiency. The combustion quality of a diesel engine is determined by the fuel injection process and the degree of mixing of oil and gas, which is a typical diffusion combustion. Therefore NO x There is a trade-off relationship with soot emissions. At present, most of the advanced control strategies and new combustion concepts are committed to achieving a compromise between the two while improving the power and economy of diesel engines. [0003] The multiple injection strategy can promote the mixing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M65/00
CPCF02M65/00F02M65/003F02M65/001
Inventor 董全杨晰宇周谈庆王迪
Owner HARBIN ENG UNIV
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