Solenoid valve diagnosis detecting method and device for electric-controlled co-rail fuel feed pump

A detection method and solenoid valve technology, applied in measurement devices, fuel injection devices, charging systems, etc., can solve problems affecting engine performance, inappropriate diagnosis and detection, and inconspicuous characteristic points of the driving current waveform of the injector solenoid valve, etc. problems, to achieve the effect of improved performance and reliability, low manufacturing cost, and improved consistency
CN101294534AInactive Publication Date: 2008-10-29CHINA FIRST AUTOMOBILE
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA FIRST AUTOMOBILE
Publication Date
2008-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a diagnosis and detection method and a device for an electromagnetic valve used for an electrically controlled common rail fuel feed pump. The method is characterized in that control parameters predetermined by test is input by a monitor program, current waveform during the drive of the electromagnetic valve is detected in real time and curve fitting is conducted; accordingly, the characteristics of the electromagnetic valve are judged, the movement circumstances when turning-on and shutting-down of the electromagnetic valve delays are measured and then whether the electromagnetic valve has the fault of deadlocking or open circuit can be analyzed. When the electromagnetic valve diagnosis and detection device is in use, no fuel injection pump test stand is needed; the use of the device can improve the consistence of the performance of the fuel feed pump electromagnetic valve, thereby greatly improving the performance and reliability of a common rail fuel injection system. The electromagnetic valve detection device has the advantages of low manufacture cost, convenient use, good self-diagnostic function and easy implementation in mass production.
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Description

technical field

[0001] The invention relates to a method and a device for diagnosing and detecting an electromagnetic valve for an electronically controlled common rail system of a diesel engine, in particular to a method and a device for diagnosing and detecting an electromagnetic valve for an electronically controlled common rail oil supply pump. Background technique

[0002] The solenoid valve for the high-pressure oil supply pump of the common rail system is an outward-opening solenoid valve. By changing the oil supply starting point of the oil supply pump, the oil supply volume of the plunger of the oil supply pump is controlled to achieve the purpose of controlling the common rail pressure of the system. The switching times of the solenoid valve of the fuel supply pump during work are directly proportional to the speed of the high-pressure fuel supply pump of the engine. Therefore, the solenoid valve needs to withstand the impact of high-frequency pulse current and mech...

Claims

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