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High-speed electromagnetic valve drive method with boosting and fault diagnosing functions and circuit

A high-speed solenoid valve, drive circuit technology, applied in electrical control, engine control, machine/engine, etc., can solve the problem of inability to realize solenoid valve circuit breaker

Active Publication Date: 2016-05-11
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

And it cannot realize the diagnosis of the four faults of solenoid valve open circuit, solenoid valve short circuit, drive circuit short circuit to power supply and drive circuit short circuit to ground

Method used

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  • High-speed electromagnetic valve drive method with boosting and fault diagnosing functions and circuit
  • High-speed electromagnetic valve drive method with boosting and fault diagnosing functions and circuit
  • High-speed electromagnetic valve drive method with boosting and fault diagnosing functions and circuit

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Embodiment Construction

[0048] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0049] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0050] A high-speed solenoid valve driving method with boosting and fault diagnosis functions, comprising the following contents:

[0051] Utilize the inductance characteristics of the solenoid valve itself, use the solenoid valve as a power inductor to charge the high-voltage capacitor, drive the solenoid valve to work by controlling the on-off of the switch tube, and complete the boost function during this period;

[0052] If the voltage of the high-voltage capacitor does not reach the set value during the injection period, the voltage can continue to increase between two injections until the voltage reaches the set value; the voltage of the high-voltage capacitor is detected, and if t...

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Abstract

The invention provides a high-speed electromagnetic valve drive method with boosting and fault diagnosing functions. The method comprises the following steps that the inductance characteristic of an electromagnetic valve is utilized, the electromagnetic valve serves as a power inductor to charge a high-voltage capacitor, the electromagnetic valve is driven to work by controlling the on-off states of a switching tube, and the boosting function is finished in the period; if the voltage of the high-voltage capacitor does not reach the set value in the jet period, boosting can be continuously performed at the interval of two times of jet till the voltage reaches the set value; and the open-circuit fault of the electromagnetic valve and the short-circuit fault of the electromagnetic valve are judged according to the current rising speed of the electromagnetic valve. The method has the beneficial effects that no additional boosted circuit is needed, the inductance characteristic of the electromagnetic valve is utilized for charging the high-voltage energy storage capacitor, and the boosting function is finished in the jet period and at the jet interval; and the fault diagnosis of the electromagnetic valve can be finished, and when the fault happens, jetting can be stopped, and the fault is fed back to an engine control unit.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic valve injection drive, and in particular relates to a high-speed electromagnetic valve driving method and circuit with functions of boosting voltage and fault diagnosis. Background technique [0002] With the continuous improvement of diesel engine electronic control technology, the injection system has gradually developed from the traditional mechanical pump injection system to the current electronically controlled unit pump injection system and common rail injection system. As one of its key technologies, high-speed solenoid valve drive has also been obtained. developed rapidly. In the electronic control fuel injection system of diesel engine with solenoid valve as the executive component, the driving of solenoid valve plays a decisive role in the performance of the whole injection system. [0003] In the current technology, the driving of general high-speed solenoid valves is driven by...

Claims

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Application Information

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IPC IPC(8): F02D41/20F02D41/22F02D41/30F02D41/14
CPCF02D41/1401F02D41/20F02D41/221F02D41/30F02D2041/1413F02D2041/2006F02D2041/2048F02D2041/2051F02D2041/2089F02D2041/2093F02D2041/224
Inventor 郭佳旭陈志瑞褚全红张春范燕朝王霞申晓彦姚素娟杨薇张丰
Owner CHINA NORTH ENGINE INST TIANJIN
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