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Method for judging performance of electromagnetic oil injector through exhaust temperature test

A technology for exhaust gas temperature and fuel injectors, which is applied in the technical field of electromagnetic fuel injector performance detection methods, can solve the problems of expensive fuel injectors, cumbersome methods, and inability to completely determine fuel injector failures, and achieve efficient and reliable detection Effect

Inactive Publication Date: 2019-11-19
PANGANG GRP MINING
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AI Technical Summary

Problems solved by technology

[0002] At present, electromagnetic injectors are widely used in diesel engines. Electromagnetic injectors for diesel engines are the most critical and complex components in common rail fuel systems. They have the advantages of precise manufacturing, precise control, and long service life. The quality and system maintenance requirements are high, and the fuel injector is expensive. For example, the electromagnetic fuel injector of Cummins QSK19 engine is 25,000 yuan / piece
Second, when the electromagnetic fuel injector of the electronically controlled diesel engine fails, the engine will correspondingly experience symptoms such as difficulty in starting, unstable idling speed, poor acceleration, blasting, blue smoke, black smoke, and vibration, which will cause abnormal wear and tear of related mechanical components. There is no practical detection method, and it is impossible to judge the performance of the fuel injector under the heavy load of the engine, which often leads to mistakes in judging the fuel injector failure, and directly replaces the complete fuel injector, resulting in waste of cost and increased labor intensity
Existing detection method has two kinds: 1, use INSITE TM To find the current and non-current fault codes, or conduct a cylinder disconnection test, it is not completely sure whether the fuel injector is faulty
2. Through the method of testing the oil return volume of the single cylinder injector, this method is too cumbersome

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with embodiment.

[0015] The present invention is preferably implemented through the following steps:

[0016] Step 1. After ensuring that the liquid levels of each system of the vehicle meet the technical standards, start the engine and run it at idle speed for at least 5 minutes, preferably 5 minutes in this embodiment. Then use a thermometer to align the position where the exhaust manifold is connected to the cylinder head, and measure Obtain the exhaust gas temperature of each cylinder. If the exhaust gas temperature is between 60°C and 90°C, it is determined that the electromagnetic fuel injector is working normally under idling conditions.

[0017] Step 2: Increase the speed to 1750 rpm-1850 rpm, and run at this speed for 3 minutes to 5 minutes, then use a thermometer to align the position where the exhaust manifold is connected to the cylinder head, and measure the Cylinder exhaust temperature...

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Abstract

The invention relates to a method for judging the performance of an electromagnetic oil injector through an exhaust temperature test, and belongs to the technical field of electromagnetic oil injectorperformance detection methods. The method is suitable for an electric control diesel engine. According to the method, whether the oil injector has a fault or not can be judged only by testing the exhaust temperature of the electromagnetic oil injector under various load states of an electric control diesel engine, and thus the detection is more efficient, reliable and scientific.

Description

technical field [0001] The invention relates to a method for determining the performance of an electromagnetic fuel injector by exhaust temperature testing, belongs to the technical field of electromagnetic fuel injector performance detection methods, and is suitable for electronically controlled diesel engines. Background technique [0002] At present, electromagnetic injectors are widely used in diesel engines. Electromagnetic injectors for diesel engines are the most critical and complex components in common rail fuel systems. They have the advantages of precise manufacturing, precise control, and long service life. The quality and system maintenance requirements are high, and the fuel injector is expensive. For example, the electromagnetic fuel injector of Cummins QSK19 engine is 25,000 yuan / piece. Second, when the electromagnetic fuel injector of the electronically controlled diesel engine fails, the engine will correspondingly experience symptoms such as difficulty in ...

Claims

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Application Information

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IPC IPC(8): F02M65/00
CPCF02M65/00
Inventor 蒋家国
Owner PANGANG GRP MINING
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