Performance online detecting method and device for proportional solenoid valve
A technology of proportional solenoid valve and detection method, which is applied in the direction of measuring device, measuring electricity, measuring electric variable, etc., can solve the problem that the motion characteristics of proportional solenoid valve cannot be dynamically detected online.
Active Publication Date: 2019-03-29
FAW JIEFANG AUTOMOTIVE CO
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[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 embodiments.
[0029] Proportional solenoid valve online performance testing device, such as figure 1 As shown, including: controller, proportional solenoid valve drive circuit, current sensor, current control module, signal conversion module;
[0030] The controller outputs the pulse drive signal a1 to the proportional solenoid valve drive circuit, and the proportional solenoid valve drive circuit outputs the drive current of the proportional solenoid valve after receiving the pulse drive signal a1; the pulse drive signal a1 and the drive current waveform a2 are as follows figure 2 As shown; the drive current of the proportional solenoid valve is sampled through the current sensor; the signal conversion module converts the current signal of the sampled proportional solenoid valve drive current into a voltage signal and sends it to the controller; the current control module ...
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The invention provides a performance online detecting method for a proportional solenoid valve. The main improvement of the method is that: it is judged whether the driving current waveform of the proportional solenoid valve has an inflection point which suddenly rises after a gentle section; if not, it is determined that a valve core of the current proportional solenoid valve is locked; and if the inflection point is not obvious, or the occurrence time of the inflection point is later than the occurrence time of the corresponding inflection point in the driving current waveform of a normal proportional solenoid valve, it is determined that the valve core of the current proportional solenoid valve is stuck. The performance online detecting method and device can test the dynamic response characteristic of the valve core of the proportional solenoid valve on line, and test the movement characteristic of the valve core of the proportional solenoid valve on line, thereby performing onlineperformance evaluation on the proportional solenoid valve.
Description
technical field [0001] The invention relates to a proportional solenoid valve, in particular to a performance detection method of a proportional solenoid valve. Background technique [0002] In the diesel engine electronic control fuel injection system, the proportional solenoid valve is the main unit to adjust the fuel pressure. The change of the movement characteristics of the valve core, such as sticking or jamming, has an important impact on the normal operation of the entire fuel supply system. In the current published patents, the proportional solenoid valve is tested by off-line methods, such as flow test bench or precision laser ranging; or to judge the short circuit and open circuit of the proportional solenoid valve electromagnet. [0003] The publication number is CN103375234A, a patent for invention, a method for diagnosing a metering valve and a device for performing the method. The metering valve is diagnosed by comparing the relationship of the given metering...
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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