Method for detecting overall engine leakage of diesel engine

A leakage detection and diesel engine technology, which is applied in the direction of measuring the increase and decrease rate of the fluid, using the liquid/vacuum degree to measure the liquid tightness, etc., can solve the problems of reducing production efficiency, reducing production tact, increasing production costs, etc., and achieve improvement Accuracy and the effect of reducing the probability of misjudgment

Inactive Publication Date: 2015-10-14
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing detection technology has the following disadvantages: 1. After the three-leakage fault is found in the hot test, it needs to be repaired and re-calibrated, which greatly increases the production cost and reduces the production cycle. With the application of the diesel engine cold test technology, It is even more necessary to prevent and repair the three engine leaks in advance; 2. Some manufacturers only determine a production model with a set of leakage limits, which will cause a large number of misjudgments, greatly reduce production efficiency, and thus cannot effectively guide production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Leak detection of the complete diesel engine model 6DM2-42E3 includes the following steps:

[0024] 1), the interface is blocked and connected to the leak meter:

[0025] The oil passage interface connected with the oil passage on the complete diesel engine includes an exhaust pipe port, an air intake pipe port, a respirator port, an oil gauge port, a centrifugal machine filter port, an air compressor inlet and an air compressor outlet , wherein the exhaust pipe port, the centrifugal machine filter port and the air intake pipe port are connected to the oil passage detection channel of the leak meter, and the remaining oil passage interfaces are blocked with a plugging tool; the water passage connected to the water passage on the diesel engine The interface includes the water pump port and the water outlet of the thermostat. The water pump port is connected to the water channel detection channel of the leak meter, and the remaining water channel interfaces are blocked wi...

Embodiment 2

[0032] Leak detection of the complete diesel engine model 6DM2-42E3 includes the following steps:

[0033] 1), the interface is blocked and connected to the leak meter:

[0034] The oil passage interface connected with the oil passage on the complete diesel engine includes an exhaust pipe port, an air intake pipe port, a respirator port, an oil gauge port, a centrifugal machine filter port, an air compressor inlet and an air compressor outlet , wherein the exhaust pipe port, the centrifugal machine filter port and the air intake pipe port are connected to the oil passage detection channel of the leak meter, and the remaining oil passage interfaces are blocked with a plugging tool; the water passage connected to the water passage on the diesel engine The interface includes the water pump port and the water outlet of the thermostat. The water pump port is connected to the water channel detection channel of the leak meter, and the remaining water channel interfaces are blocked wi...

Embodiment 3

[0040] Leak detection of the complete diesel engine model 6DM2-42E3 includes the following steps:

[0041] 1), the interface is blocked and connected to the leak meter:

[0042] The oil passage interface connected with the oil passage on the complete diesel engine includes an exhaust pipe port, an air intake pipe port, a respirator port, an oil gauge port, a centrifugal machine filter port, an air compressor inlet and an air compressor outlet , wherein the exhaust pipe port, the centrifugal machine filter port and the air intake pipe port are connected to the oil passage detection channel of the leak meter, and the remaining oil passage interfaces are blocked with a plugging tool; the water passage connected to the water passage on the diesel engine The interface includes the water pump port and the water outlet of the thermostat. The water pump port is connected to the water channel detection channel of the leak meter, and the remaining water channel interfaces are blocked wi...

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PUM

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Abstract

The invention relates to a method for detecting the overall engine leakage of a diesel engine, which comprises the steps of plugging an interface and connecting the interface with a leakage instrument, detecting the leakage condition and judging the detecting result, judging the leakage condition and the like. The step of detecting the leakage condition and judging the detecting result comprises the procedures of monitoring the leakage between a water channel and an oil duct, detecting the leakage of the water channel and detecting the leakage of the oil duct. According to the technical scheme of the invention, the leakage condition of the water channel and the leakage condition of the oil duct of the overall diesel engine are detected, and each leakage site can be accurately found out. Therefore, the leakage condition of the overall diesel engine can be accurately determined, and the leakage site of the diesel engine can be timely and accurately found out. The leakage detection accuracy of the overall diesel engine can be improved, so that the diesel engine can be required more targetedly. The misjudgment rate is greatly reduced, and the reworking rate of the overall diesel engine is lowered. Meanwhile, the repair cost and the energy consumption during the heat test are reduced. Moreover, the production efficiency is improved, and the assembly quality of the diesel engine is increased.

Description

technical field [0001] The invention relates to a leakage detection method for auto parts, in particular to a leakage detection method for a complete heavy-duty diesel engine, which belongs to the technical field of diesel engine production. Background technique [0002] During the assembly process of engine parts, due to the defects of the parts themselves, improper assembly and other reasons, there will be leakage in the water channel, oil channel and oil channel of the engine. At present, most of the three leakage faults of diesel engines are found through hot tests; some manufacturers that have applied the leakage detection technology of the whole machine have only determined a limit value for the leakage rate of the water channel, a limit value for the leakage rate of the oil channel, and water, oil, The leakage rate limit of oil channel mutual leakage, as long as it exceeds the limit, it will be repaired. [0003] The existing detection technology has the following di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
Inventor 陈磊李红剑张俊雄朱炜平志谦
Owner CHINA FIRST AUTOMOBILE
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