Automobile engine manifold air inlet system based on MEMS pressure sensor

A technology for automobile engines and pressure sensors, which is applied in the direction of machines/engines, engine components, and charging systems, etc., which can solve the problems of decreased accuracy of data collected by MEMS pressure sensors and decreased sensitivity of sensitive components, so as to avoid impact damage and improve cleanliness Effect

Pending Publication Date: 2022-04-15
戚忠杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the MEMS pressure sensor is generally installed in the engine intake manifold, and the engine intake manifold only supplies air to a single engine cylinder, and due to the movement characteristics of the piston inside the engine cylinder, the manifold is in the form of pulses when supplying air. When the airflow flows in the manifold, it will generate bursts of impact on the sensitive elements of the MEMS pressure sensor. After long-term impact, the sensitivity of the sensitive elements will inevitably decrease, resulting in a decrease in the accuracy of data collected by the MEMS pressure sensor.

Method used

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  • Automobile engine manifold air inlet system based on MEMS pressure sensor
  • Automobile engine manifold air inlet system based on MEMS pressure sensor
  • Automobile engine manifold air inlet system based on MEMS pressure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to Figure 1-3 , an automobile engine manifold intake system based on a MEMS pressure sensor, comprising a sealing cylinder 1, a monitoring air supply device 2 for supplying air to the engine manifold is installed in the sealing cylinder 1, and the monitoring air supply device 2 includes an air suction pipe 201 , check valve 202, MEMS air pressure sensor 203, flow conversion mechanism 204 and air outlet pipe 205, and the pipe diameter of air outlet pipe 205 is greater than the pipe diameter of suction pipe 201; On the inner wall of sealing cylinder 1, there is an air port 6, and the air suction pipe 201 and the air outlet pipe 205 are connected with the inside of the sealed cylinder 1, the MEMS air pressure sensor 203 is installed on the suction pipe 201, and the check valve 202 is installed in the suction pipe 201. Specifically, the MEMS air pressure sensor 203 and the check valve 202 The installation methods are all mature technologies, and the check valve 202 a...

Embodiment 2

[0037] refer to Figure 4-6 , different from Embodiment 1, the side wall of the rubber slide plug 2041 is provided with a rotary groove 7, and a circulation device 8 for continuous circulation and purification of the air is installed in the rotary groove 7. The circulation device 8 includes a rubber column 801, an iron sheet 802, Telescopic bellows 803, two scrapers 804 and permanent magnet sheet 805. Specifically, fur is fixedly arranged on the iron sheet 802, so that when the iron sheet 802 moves up and down, the fur on the iron sheet 802 can rub against the inner wall of the strip groove 9 to cause static electricity on the surface of the rubber column 801.

[0038] The rubber column 801 is sealed and rotatably connected in the rotary groove 7, and the inner bottom of the rotary groove 7 is provided with a groove 11, and a spring shaft 12 is rotatably connected in the groove 11, and the spring shaft 12 is fixedly connected with the rubber column 801, and the strip groove 9 ...

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Abstract

The invention discloses an automobile engine manifold air inlet system based on an MEMS pressure sensor, which comprises a sealing cylinder, a monitoring air supply device for supplying air to an engine manifold is arranged in the sealing cylinder, and the monitoring air supply device comprises an air suction pipe, a check valve, an MEMS air pressure sensor, a variable flow mechanism and an air outlet pipe, the pipe diameter of the air outlet pipe is larger than that of the air suction pipe; the flow changing mechanism is used for changing the air suction frequency in the air suction pipe and comprises a rubber sliding plug and a precision spring. The air suction pipe, the air outlet pipe and the flow changing mechanism are arranged, the MEMS air pressure sensor is installed on the air suction pipe, the air inlet frequency in the air suction pipe is changed through the flow changing mechanism, air in the air suction pipe can flow constantly and stably, and a compensation value is given to the MEMS air pressure sensor according to the ratio of the air outlet pipe to the air suction pipe; in this way, the MEMS air pressure sensor can monitor the air inlet pressure of the engine in real time, and meanwhile impact damage to the MEMS air pressure sensor caused by pulse airflow can be avoided.

Description

technical field [0001] The invention relates to the technical field of application of MEMS pressure sensors, in particular to an automobile engine manifold intake system based on MEMS pressure sensors. Background technique [0002] MEMS sensors, also known as micro-electromechanical systems, are made of semiconductor technology and materials. They are small in size and high in performance, and are widely used in automotive electronic control systems. [0003] Among them, for the automobile engine air intake system, MEMS pressure sensors are generally used to detect the intake air pressure, so as to monitor and control the engine air intake in real time. At present, the MEMS pressure sensor is generally installed in the engine intake manifold, and the engine intake manifold only supplies air to a single engine cylinder, and due to the movement characteristics of the piston inside the engine cylinder, the manifold is in the form of pulses when supplying air. When the airflow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/02F02M35/10F02M35/104
Inventor 不公告发明人
Owner 戚忠杰
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