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Method, device and system for monitoring state of air filter

A monitoring system and monitoring device technology, applied in the direction of fuel air filter, etc., can solve the problems of increased maintenance cost, air filter performance degradation, engine performance degradation, etc., to achieve accurate and timely maintenance or replacement, improve service life, and reduce maintenance The effect of fees

Inactive Publication Date: 2018-09-07
WEICHAI POWER CO LTD
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  • Application Information

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Problems solved by technology

If the air filter is clogged, it will inevitably affect the performance of the air filter, and it will also affect the booster system, lubrication system, etc., which will eventually lead to performance degradation, wear or damage of the engine.
Therefore, it is very necessary to clean or replace the air filter in time, but if the air filter is replaced too frequently, it will increase the maintenance cost
[0003] The cleaning or replacement of the existing air filter is usually through the mechanical alarm on the air filter to remind the driver to clean or replace; or, to go to the service station for maintenance or cleaning or replacement, the current monitoring of the status of the air filter is passive Monitoring, due to Euro VI and higher exhaust restrictions and performance requirements, this passive monitoring method can no longer guarantee the status of the engine

Method used

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  • Method, device and system for monitoring state of air filter
  • Method, device and system for monitoring state of air filter

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Embodiment Construction

[0035] Explanation of related terms:

[0036] The EGR (Exhaust Gas Recirculation) valve is a mechatronic product installed on the engine to control the amount of exhaust gas recirculation fed back to the intake system. Its function is to control the amount of exhaust gas entering the intake pipe so that a certain A large amount of exhaust gas flows into the intake pipe for recirculation, and the EGR valve is a very important and key component in the exhaust gas recirculation device. In addition, diesel engines and engines without EGR valves can also use this strategy.

[0037] The present invention measures intake resistance by adding a pressure sensor behind the air filter, pre-calibrates the resistance threshold map under different intake flow rates, and actively monitors the state of the air filter by comparing the actual intake resistance with the resistance threshold under different working conditions. Realize automatic alarm to prompt the driver for maintenance or repla...

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Abstract

The invention discloses a method for monitoring the state of an air filter. The method comprises the following steps that 1, an intake resistance pressure sensor is used for detecting intake resistance of the air filter under different air intake flow, so that actual intake resistance under different working conditions is obtained; 2, the actual intake resistance is compared with resistance threshold value pulse spectrum, and the resistance threshold value pulse spectrum is pre-calibrated at different air intake flow; and 3, when the actual intake resistance is larger than the resistance threshold value pulse spectrum, an alarm signal is sent to remind a driver to maintain or replace the air filter. According to the method, active monitoring of the states of the air filter is realized, thedriver can be effectively and accurately reminded to maintain or replace the air filter, the maintenance cost can be reduced, the normal performance of an engine can be guaranteed, and therefore therunning state of the engine is guaranteed, and the service life of the engine is prolonged. Meanwhile, the invention further discloses a device and system for monitoring the state of the air filter.

Description

technical field [0001] The invention relates to the technical field of automatic monitoring, in particular to a method, device and system for monitoring the state of an air filter. Background technique [0002] As one of the main components of the engine intake system, the air filter mainly provides clean, dry and sufficient air for the engine. With the continuous upgrading of emission regulations and the continuous improvement of engine technology, the requirements for air cleanliness of various systems are also getting higher and higher. If the air filter is clogged, it will inevitably affect the performance of the air filter, and it will also affect the booster system, lubrication system, etc., which will eventually lead to performance degradation, wear or damage of the engine. Therefore, it is very necessary to clean or replace the air filter in time, but if the air filter is replaced too frequently, the maintenance cost will be increased. [0003] The cleaning or repl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/09
Inventor 代子阳张玉杰王意宝吴晓林张文霞
Owner WEICHAI POWER CO LTD
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