Air filter state detection method, system and vehicle

Abstract

A method for detecting the state of an air filter, comprising: obtaining the air flow rate and the front-back pressure difference of the air filter in real time, recording multiple front-back pressure differences corresponding to each air flow rate; extracting an air flow rate and the corresponding air flow rate A plurality of front and rear pressure differences, the average front and rear pressure difference is calculated by the multiple front and rear pressure differences; according to the corresponding relationship between the standard air flow of the air filter and the minimum front and rear pressure difference threshold and the maximum front and rear pressure difference threshold established in advance, matching The minimum front-back pressure difference threshold and the maximum front-back pressure difference threshold corresponding to the currently extracted air flow; compare the average front-back pressure difference with the minimum front-back pressure difference threshold and the maximum front-back pressure difference threshold to determine whether the air filter status of the cleaner. The detection result of the invention is accurate and real-time, so that the driver can be reminded in time.

Description

technical field [0001] The invention belongs to the technical field of vehicle fault detection, and in particular relates to an air filter state detection method, system and vehicle. Background technique [0002] The air filtration system is one of the necessary elements to ensure the normal operation of the engine, and it is also an important part of the car's air intake system. When the engine is running, the outside air will enter the piston through the air filter and the intake cooling system, and mix with fuel. After ignition, the fuel-air mixture burns to expand the gas in the cylinder, pushes the crank-link mechanism to do work, and then pushes the car forward through the power transmission system. [0003] With the rapid development of the automobile industry, higher requirements are placed on the air filtration system. As a key component of the air filtration system, the air filter directly affects the performance of the engine. The tightness of the air filter is ...

AI Technical Summary

Problems solved by technology

The tightness of the air filter is the prerequisite to ensure its filtering effect. If the tightness is not good enough, the unfiltered air will directly enter the engine, which will cause noise in the engine and wear the piston; During the use of the air filter, impurities such as dust will remain in the air filter, which will block the air filter after a long time, and the filtering effect will gradually decrease with the use time, which will lead to insufficient intake of the engine. Reduce its operating performance, resulting in a series of problems such as pollutant emissions and fuel consumption increase, difficult engine start acceleration and engine oil aging

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