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Method and system for early warning air leakage of piston

A technology of piston air leakage and early warning system, which is applied in the direction of measuring the acceleration and deceleration rate of fluid and using liquid/vacuum degree for liquid tightness measurement, etc. , to reduce the failure rate

Inactive Publication Date: 2015-04-29
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the piston ring is working, due to the influence of high temperature, high pressure, and poor lubrication conditions, it is prone to wear and tear, resulting in gaps, resulting in air leakage or lubricating oil in the cylinder, resulting in engine scuffing and reduced engine performance.

Method used

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  • Method and system for early warning air leakage of piston
  • Method and system for early warning air leakage of piston
  • Method and system for early warning air leakage of piston

Examples

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Embodiment 1

[0048] see figure 1 , which is a schematic diagram of Embodiment 1 of a piston leakage early warning method provided by the present invention.

[0049] A method for early warning of piston air leakage provided in this embodiment includes the following steps:

[0050] Step 101: Determine the piston leakage amount corresponding to the piston gas pressure according to the energy conservation law.

[0051] Piston blow-by generally refers to the gas flow that escapes from the crankcase ventilation pipe during the operation of the engine. The piston gas pressure refers to the pressure of the gas flowing through the oil-gas separation connecting pipe, the cylinder and the crankcase.

[0052] The present invention does not specifically limit how to determine the piston leakage amount corresponding to the piston gas pressure according to the law of energy conservation. For example, the piston leakage is determined according to formula (1):

[0053] B = ...

Embodiment 2

[0066] see figure 2 , which is a schematic diagram of Embodiment 2 of a piston air leakage early warning method provided by the present invention.

[0067] The piston air leakage early warning method provided by the embodiment of the present invention includes the following steps:

[0068] Step 201: Determine the piston leakage amount corresponding to the piston gas pressure according to the energy conservation law.

[0069] Step 202: Judging whether the air leakage of the piston is within the first threshold range, if yes, go to step 203; if not, go to step 204.

[0070] Step 203: Make an alarm.

[0071] Step 204: Judging whether the air leakage of the piston is within the second threshold range, if yes, go to step 203.

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Abstract

The embodiment of the invention discloses a method and system for early warning the air leakage of a piston. The method comprises the following steps: according to an energy conservation law, confirming the air leakage amount of a piston, which corresponds to the air pressure of the piston; judging whether the air leakage amount of the piston is within a first threshold range, wherein the first threshold range is confirmed according to the power of a current engine; if yes, warning is performed. The embodiment of the invention further discloses a system for early warning the air leakage of the piston. For the method and system disclosed by the invention, the air leakage amount of the piston is confirmed according to the air pressure of the piston, and when the air leakage amount of the piston is within the first preset range, warning is performed, so that a driver can take a corresponding measure to avoid the phenomenon of cylinder scoring occurs, and the failure rate of vehicles is lowered.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method and system for early warning of piston air leakage. Background technique [0002] The piston is the "heart" of the automobile engine, which bears alternating mechanical loads and thermal loads, and is one of the key components in the engine with the worst working conditions. Typically, a piston mainly includes a crown, a ring groove and a skirt. The function of the piston is to withstand the gas pressure and transmit it to the connecting rod through the piston pin to drive the crankshaft to rotate. The top of the piston is also an integral part of the combustion chamber. [0003] The air ring in the piston ring is connected to the upper ring groove of the piston, and is used to seal the gap between the piston and the cylinder wall to prevent the gas in the cylinder from escaping and entering the lubricating oil. When the piston ring is working, due to the influence of high t...

Claims

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Application Information

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IPC IPC(8): G01M3/26
Inventor 丁国栋刘菲
Owner WEICHAI POWER CO LTD
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