Proportional solenoid valve on-line performance testing method and proportional solenoid valve on-line performance testing device
A proportional solenoid valve and detection device technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of inability to dynamically detect the motion characteristics of proportional solenoid valves online
Active Publication Date: 2021-05-14
FAW JIEFANG AUTOMOTIVE CO
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Problems solved by technology
[0006] The test plan disclosed above or use the test bench for offline measurement and judgment or to judge whether there is a short circuit or not, but cannot dynamically detect the motion characteristics of the proportional solenoid valve online
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[0028]The present invention will be further described below in conjunction with specific drawings and examples.
[0029]Proportional solenoid valve online performance detection device, such asfigure 1 As shown, including: controller, proportional solenoid valve drive circuit, current sensor, current control module, signal conversion module
[0030]The controller proportional solenoid valve drive circuit output pulse drive signal A1, the proportional solenoid valve drive circuit receives the pulse driving signal A1, the drive current of the proportional solenoid valve; the pulse drive signal A1 and the drive current waveform A2figure 2 The display; the drive current of the current sensor sampling proportion of solenoid valve; the signal conversion module converts the current signal of the sampled proportional solenoid valve drive current into a voltage signal and transmits to the controller; the current control module is driven according to the scaled proportional solenoid valve The compar...
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The invention provides an online performance detection method of a proportional solenoid valve. The main improvement is that, for the driving current waveform of a proportional solenoid valve, it is judged whether there is an inflection point that rises suddenly after a flat section, and if there is no such inflection point, the current proportional solenoid valve is judged. The spool of the solenoid valve is stuck. If the inflection point is not obvious, or the occurrence time lags behind that of the corresponding inflection point in the driving current waveform of the normal proportional solenoid valve, it is determined that the spool of the current proportional solenoid valve is stuck. The invention can test the dynamic response characteristics of the valve core of the proportional solenoid valve on-line, and test the motion characteristics of the valve core of the proportional solenoid valve on-line, so as to perform online performance evaluation on the proportional solenoid valve.
Description
Technical field[0001]The present invention relates to a proportional solenoid valve, in particular a performance detection method of a proportional solenoid valve.Background technique[0002]In the diesel electrical control fuel injection system, the proportional solenoid valve is used as the main unit that adjusts the fuel pressure, and the motion characteristics of the spool are changed, such as stuck or card, there is an important impact on the normal operation of the entire fuel supply system. The currently disclosed patents are tested by the proportional solenoid valve by offline methods, such as flow test bench or precision laser ranging; or the short circuit disconnection of the proportional solenoid valve electromagnet.[0003]The disclosure is CN 103375234A, inventive patent, method for diagnosing metering valves, and apparatus for performing the method. By adjusting the metering valve manipulation signal determined based on a predetermined metering rate to obtain a real meteri...
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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 蒋兆杰胡猛杨明刘敏蒋佳豪张武凯杨雪
Owner FAW JIEFANG AUTOMOTIVE CO