Detection device and method for fault of engine fuel system

A fuel system and detection device technology, which is applied in the direction of engine testing, measuring devices, machine/structural component testing, etc. It can solve the problem of weak ability to explain the cause of failure, weak guidance for troubleshooting, and inability to judge the fuel supply angle. Size and other issues

Inactive Publication Date: 2009-03-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the detection methods of the fuel system mainly include vibration purification method, waveform analysis method, spectrum analysis method and frequency response function method. The size of the oil angle, therefore, has a certain one-sidedness, resulting in a weak ability to explain the cause of the fault, and the guidance for troubleshooting is not strong

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  • Detection device and method for fault of engine fuel system
  • Detection device and method for fault of engine fuel system
  • Detection device and method for fault of engine fuel system

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Embodiment Construction

[0026] The specific implementation manner of the present invention will be further described in detail below in conjunction with the drawings and specific examples.

[0027] As shown in Fig. 1, the detection device of the engine fuel system failure of the present invention includes a rotational speed detection unit 5, a vibration detection unit 4 and a data processing unit 6, wherein the data processing unit 6 receives the speed detected by the rotational speed detection unit 5 The rotation speed signal and the combustion vibration signal obtained by the vibration detection unit 4 are amplified by the amplifier circuit and the A / D conversion circuit, and the analog / digital conversion is performed on the above-mentioned signal, and the pulse waveform of the rotation speed and the combustion vibration waveform are compared and analyzed to determine the Oil advance angle and combustion conditions.

[0028] to combine figure 2 As shown, the rotational speed detection unit 5 inclu...

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Abstract

A method for detecting fault of fuel oil system on engine includes utilizing rotation speed detection unit and vibration detection unit to collect rotation speed signal and vibration signal simultaneously then carrying out comparison and analysis on then, obtaining advance angle of fuel oil injection by comparing lead edge of pulse waveform on rotation speed with lead edge of vibration waveform on combustion and enabling to accurately judge out operation condition of air cylinder by analyzing magnitude value of vibration waveform.

Description

technical field [0001] The invention relates to an engine fault detection technology, in particular to a detection device and method for an engine fuel system fault. Background technique [0002] The main faults of the fuel system of the engine include flameout of individual cylinders, early or late fuel injection, etc. The main reason for flameout is that the fuel injector is blocked and the fuel supply pressure of the fuel injection pump is insufficient, so that the fuel cannot be atomized well, thus causing the corresponding cylinder to not work. On the one hand, flameout causes a great waste of fuel. For example, for a large-scale drilling PZ12V190 engine, if one cylinder is flamed out, nearly 1 / 12 of the fuel will be wasted. According to incomplete statistics, domestic large-scale diesel engines will lose On the other hand, it causes insufficient power output of the engine, which affects production, and makes the torque of the whole machine unbalanced, causing torsiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00
Inventor 王朝晖张来斌段礼祥梁伟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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