Breakdown alarming device of air filter

Abstract

The invention discloses an alarm device, aiming to provide an air cleaner breakdown alarm device, which comprises a pressure measuring point A and a pressure measuring point B which are positioned on two sides of a filter element of the air cleaner and connected to a pressure switch through a pressure transmission pipe, and the pressure switch, an indication lamp and a power supply form a loop through serial connection. When the air cleaner is broken down, an alarm loop of the device is conducted, the indication lamp in a driving cab lights, a buzzer calls, the sound and light alarm simultaneously, so as to remind the driver of replacing the air cleaner in time, so the breakdown of the air cleaner is real-time monitored. The invention, being capable of preventing bad discharge caused by abnormal operation of a internal combustion engine, and has remarkable environmental effectiveness, and favorable social benefit.

Description

technical field [0001] The invention relates to an alarm device, in particular to an automatic alarm device for breakdown of an air filter suitable for an engine intake system. Background technique [0002] The air filter is an important part of the engine intake system. It is not only an indispensable component for the normal, long-lasting and reliable operation of the engine, but also directly affects the power, fuel economy and service life of the engine. At the same time, the air filter The air filter has an important influence on the intake noise and exhaust smoke of the engine. According to statistics, 70% of the early breakage of construction machinery engines is related to the air filter. [0003] In order to ensure the normal use of the air filter, it is necessary to regularly clean or replace the filter element (every 3000 kilometers), but due to the great difference in the working environment, for example, the dust concentration around the car is 0.2mg / m under no...

AI Technical Summary

Problems solved by technology

[0004] But in some cases, the air filter may break down without going through the clogging process

For example, in some harsh working environments, if sand, flying stones, etc. are mixed in the intake airflow, since the filter paper material is usually made of paper, non-cotton fabric or chemical fiber material, and it is usually processed to ensure fluidity and reduce flow resistance. It is very thin, and it is very easy to be broken into a small hole, which will soon expand into a large hole and break down; in addition, some unexpected situations, such as a plastic bag suddenly being adsorbed on the air intake pipe or At the air intake port of the air filter, a large pressure fluctuation is likely to be generated instantaneously under a large flow rate, resulting in large deformation or even instantaneous breakdown of the filter paper layer; at the same time, in view of the working engineering of the engine, the intake process itself It is a pulsation process. With the development trend of high-intensity, high-power, and compact engines, the intake air volume required for combustion will gradually increase, and the pulsation process will become more severe. With the increasingly stringent emission regulations, some new technologies The application of air intake will also have an impact. For example, in SAE2004-01-1316 (Development of New 2.2-liter Turbocharged Diesel Engine for the EURO-IV Standards), Tomoya Aba et al. mentioned a variable swirl control valve SCV, SCV The opening degree changes with the working conditions, which will inevitably cause strong fluctuations in the intake air when the working conditions change, especially when the working conditions change drastically.

[0005] The current air filter clogging alarm devices are usually pressure overload switches based on the principle of diaphragm or plunger, which obviously cannot realize the above-mentioned breakdown alarm function, so it is necessary to design a special air filter breakdown alarm device

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