CN201065800Y - Air admission rectifying device and automobile air admission system - Google Patents

Abstract

The utility model discloses an air intake rectifying device and an automobile air intake system. The air intake rectifying device comprises a vent pipe, a rectifying plate and a sensor mounting seat, the rectifying plate is located at the air intake end of the vent pipe, and the sensor The installation base is fixed on the pipe wall between the air inlet end and the air outlet end of the ventilation pipe, and the middle part of the sensor installation seat is hollow and passes through the pipe wall of the ventilation pipe. The automobile air intake system includes an air intake pipe, in which an air filter, an air flow sensor, and a rectifying plate are arranged in sequence according to the air intake direction, and the rectifying plate is located between the air filter and the air flow sensor in the intake pipe between them. When the air reaches the air flow sensor fixed on the sensor installation seat, it is rectified by the rectification plate to form a uniform air flow, which can improve the measurement accuracy of the air flow sensor.

Description

Air intake rectifying device and automobile air intake system

technical field

The utility model relates to the field of automobiles, in particular to an air intake rectifying device and an automobile air intake system.

Background technique

As shown in Figure 1, the existing flow-sensing electronically controlled gasoline injection system, its intake system is composed of a resonant cavity 10, an air filter 11 and an intake pipeline 12, etc., and the air is filtered out by the air filter 11. After the impurities in the air flow directly through the air flow sensor 13, after being metered, they flow into the intake manifold 14 and are supplied to the cylinders 15 respectively. The air flow at the outlet of the air filter 11 tends to be unevenly distributed, especially if the diameter of the outlet pipeline changes or the pipeline bends, so the air flow at the measurement point of the air flow sensor 13 is unevenly distributed. And impurities and deposits in the air will also have harmful effects on the output signal of the air flow sensor 13 .

The electronic control system (ECU) controls the amount of fuel injection of the engine mainly based on the amount of air flow measured by the air flow sensor. The measurement of air flow is the premise of realizing the control of fuel injection. Accuracy will inevitably have a certain impact on the control of fuel injection quantity. The air flow sensor is more sensitive to the air distribution in the intake pipe and the impurities in the air. In the case of uneven air distribution, the air flow sensor has a large measurement error. In addition, the impurities and sediment in the air will also affect the sensor output signal. produce harmful effects.

Utility model content

The first technical problem to be solved by the utility model is to overcome the above deficiencies, and propose an air intake rectifying device, so that the air distribution at the measurement place of the air flow sensor is uniform.

Another technical problem to be solved by the utility model is to overcome the above deficiencies, and propose an automobile air intake system, so that the air distribution at the measurement place of the air flow sensor is uniform.

The first technical problem of the utility model is solved by the following technical solutions:

An air intake rectifying device, comprising a vent pipe, a rectifying plate and a sensor mounting seat, the rectifying plate is located at the intake end of the vent pipe, and the sensor mounting seat is fixed on the air intake end and the gas outlet end of the vent pipe On the pipe wall between them, the middle part of the sensor mounting seat is hollow and passes through the pipe wall of the ventilation pipe.

Preferably, a plurality of round holes are distributed on the rectifying plate.

It also includes a fireproof net cover, and the fireproof net cover is located at the air outlet end of the ventilation pipe.

The ventilation pipe includes an inner pipe and an outer pipe, the rectifying plate and the fireproof net cover are respectively located at the air inlet end and the air outlet end of the inner pipe, and the sensor mounting seat is located at the air inlet end and the air outlet end of the outer pipe On the pipe wall between, the middle part of the sensor mounting seat is hollow and passes through the pipe walls of the outer pipe and the inner pipe.

The thickness of the rectifying plate is 5 mm to 6 mm, the diameter of the circular hole is 4 mm to 6 mm, and the distance between two adjacent holes is 0.8 mm to 1.0 mm.

The distance from the center plane of the sensor mounting seat to the rectifying plate is at least 45mm.

The distance from the center of the sensor mount to the outer wall of the sensor mount is at least 20 mm.

The fireproof net cover is made of metal wire, the mesh size of the fireproof net cover is 2mm, and the diameter of the metal wire is 0.25mm.

Another technical problem of the utility model is solved by the following technical solutions:

An automobile air intake system, comprising an air intake pipe, in which an air filter and an air flow sensor are sequentially arranged according to the direction of air intake, and a rectifying plate, which is located on the air filter in the intake duct between the controller and the mass air flow sensor.

Preferably, it also includes a fireproof net cover, and the fireproof net cover is located in the intake pipe behind the air flow sensor.

The beneficial effect of the utility model compared with the prior art is that the rectifying plate of the intake rectifying device of the utility model is located at the intake end of the ventilation pipe, and the sensor mounting seat is fixed on the tube between the intake end and the gas outlet end of the ventilation pipe. on the wall. When the air reaches the air flow sensor fixed on the sensor mounting base, it will be rectified by the rectification plate to form a micro vortex, which will make the air flow distribution to the air flow sensor more uniform and improve the measurement accuracy of the air flow sensor.

The air intake rectifying device of the present utility model also includes a fireproof net cover located behind the sensor mounting seat, which can prevent engine backfire from causing harm to the air flow sensor fixed on the sensor mounting seat.

The automobile air intake system of the utility model adds a rectifying plate between the air filter and the air flow sensor, which makes the air flow through the rectifying plate to form a uniform air flow when reaching the air flow sensor, and improves the measurement accuracy of the air flow sensor. In particular, after being rectified by the rectifying plate, micro-vortices will be formed, and these micro-vortices will enter the cylinder together with the intake air to participate in the formation of the mixture and participate in the combustion, and play a certain role in promoting and improving the formation and combustion of the mixture, so that the engine The economy and emission quality are improved.

The automobile air intake system of the utility model also adds a fireproof net cover in the air intake pipe behind the air flow sensor, which can prevent the engine backfire from causing harm to the air flow sensor.

Description of drawings

Fig. 1 is the structural representation of existing automobile intake system;

Fig. 2 is a schematic sectional view of the air intake rectifying device of the present utility model;

Fig. 3 is a three-dimensional structural schematic diagram of the air intake rectifying device of the present invention;

Fig. 4 is a schematic cross-sectional view of another specific embodiment of the air intake rectifying device of the present invention;

Fig. 5 is a schematic diagram of the section structure of the rectifying plate of the air intake rectifying device of the present invention;

Fig. 6 is a schematic diagram of the installation requirements of the air intake rectifying device of the present invention;

Fig. 7 is a schematic diagram of the micro-eddy current formation of the rectifying plate of the present invention;

Fig. 8 is a structural schematic diagram of the automobile air intake system of the present invention.

Detailed ways

As shown in Figure 2, the intake rectifying device of the present utility model comprises a vent pipe 3, a rectifying plate 1 and a sensor mounting seat 4, the rectifying plate 1 is located at the intake end of the vent pipe 3, and the sensor mounting seat 4 Fixed on the pipe wall between the air inlet end and the air outlet end of the air pipe 3, the middle part of the sensor mounting seat 4 is hollow and penetrates the pipe wall of the air pipe 3, and the air outlet end of the air pipe 3 is provided with The fireproof net cover 2, the air flow sensor 13 is housed in the middle part of the sensor mounting seat 4. The distance L3 between the center plane of the sensor mounting base 4 and the rectifying plate 1 is at least 45mm. The distances L1 and L2 from the center of the sensor mounting base 4 to the outer wall of the sensor mounting base 4 are at least 20mm. The fireproof net cover 2 is made of metal wire, the mesh size of the fireproof net cover 2 is 2mm, and the diameter of the metal wire is 0.25mm.

As shown in FIG. 3 , a triangular flange 5 is provided at both ends of the vent pipe 3 to connect with the intake pipes at both ends respectively.

As shown in Figure 4, the ventilation pipe 3 can also include an inner pipe 3" and an outer pipe 3', and the rectifying plate 1 and the fireproof net cover 2 are respectively located at the air inlet end and the air outlet end of the inner pipe 3", The sensor mounting seat 4 is located on the pipe wall between the air inlet end and the air outlet end of the outer pipe 3', and the middle part of the sensor mounting seat 4 is hollow and penetrates the pipe walls of the outer pipe 3' and the inner pipe 3". , the air flow sensor 13 is installed in the middle of the sensor mount 4 .

As shown in FIG. 5 , the shape of the hole on the rectifying plate is circular. The thickness of the rectifying plate is 5 mm, the diameter of the circular hole is 4 mm, and the distance between two adjacent holes is 0.8 mm. Another embodiment is that the thickness of the rectifying plate is 6 mm, the diameter of the circular hole is 6 mm, and the distance between two adjacent holes is 1.0 mm. Another embodiment is that the thickness of the rectifying plate is 5.5 mm, the diameter of the circular hole is 5 mm, and the distance between two adjacent holes is 0.9 mm. The rectifying plate can reduce turbulent noise. Different rectifier plate hole diameters and hole spacing have different noise reduction frequency ranges and noise reduction amounts. The smaller the hole diameter and hole spacing, the better the high-frequency noise reduction effect.

As shown in Figure 6, when the air intake rectifying device of the present invention is installed on the automobile, the sensor mounting seat should be vertically upward as far as possible, so that at least the angle between the sensor mounting seat and the horizontal plane is within the range of ±45°. In this way, water can be prevented from falling into the sensor mounting seat, which will affect the measurement accuracy of the air flow sensor installed in the sensor mounting seat.

The working principle of the above air intake rectifying device is as follows: as shown in Figure 7, after the air intake rectifying device of the present utility model is installed in the air intake system of the automobile, the air is rectified through the rectifying plate 1 before reaching the air flow sensor. . When the high-speed airflow passes through the rectifying plate 1, a large amount of airflow will inevitably break away from the rectifying device, forming countless detached small vortices, that is, uniform micro-eddy currents, so that the measurement place of the air flow sensor 13 can form a more pure and uniform Airflow improves sensor measurement accuracy. It makes the electronic control system control the fuel injection quantity of the engine more accurately. And the fireproof net cover 2 can prevent the engine backfire from causing damage to the air flow sensor.

As shown in Figure 8, the automobile air intake system of the present utility model comprises a resonant cavity 10, an air filter 11, an intake pipe 12, an air flow sensor 13, an intake manifold 14, and a cylinder 15, and the air flow sensor 13 is installed On sensor mount 4. Resonant cavity 10 , air filter 11 , and air flow sensor 13 are sequentially arranged in intake pipe 12 according to the direction of intake air, and intake pipe 12 is connected to cylinder 15 through intake manifold 14 . The automobile air intake system also includes a rectifying plate 1 , and the rectifying plate 1 is located in the intake pipe 12 between the air filter 11 and the air flow sensor 13 . The automobile air intake system also includes a fireproof net cover 1 , and the fireproof net cover 1 is located in the intake pipe 12 between the air flow sensor 13 and the intake manifold 14 .

The working principle of the above-mentioned automobile air intake system is as follows: After the rectification plate is installed in the automobile air intake system, a more pure and uniform air flow can be formed at the measurement place of the air flow sensor, which improves the measurement accuracy of the sensor. Make the electronic control system control the fuel injection quantity of the engine more accurately. And the fire grille can prevent engine backfire from causing damage to the air flow sensor. In particular, the rectifying plate can also improve the intake effect at the same time, make the combustion more complete, and significantly improve the economic performance and emission quality of the engine.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (10)

1. air inlet rectifying device is characterized in that:

Comprise breathing pipe (3), current plate (1) and sensor fitting seat (4), described current plate (1) is positioned at the inlet end of described breathing pipe (3), described sensor fitting seat (4) is fixed on the inlet end and the tube wall between the outlet side of described breathing pipe (3), and described sensor fitting seat (4) middle part is hollow and connects the tube wall of breathing pipe (3).

2. air inlet rectifying device according to claim 1 is characterized in that:

Described current plate is distributed with a plurality of circular holes on (1).

3. air inlet rectifying device according to claim 2 is characterized in that:

Also comprise fire prevention guard (2), described fire prevention guard (2) is positioned at the outlet side of described breathing pipe (3).

4. according to the arbitrary described air inlet rectifying device of claim 1 to 3, it is characterized in that:

Described breathing pipe (3) comprises interior pipe (3 ") and outer tube (3 '); described current plate (1) and fire prevention guard (2) lay respectively at described in the inlet end and the outlet side of pipe (3 "), described sensor fitting seat (4) is positioned on the inlet end and the tube wall between the outlet side of described outer tube (3 '), and described sensor fitting seat (4) middle part be hollow and the tube wall of perforation outer tube (3 ') and interior pipe (3 ").

5. according to the arbitrary described air inlet rectifying device of claim 2 to 3, it is characterized in that:

The thickness of described current plate (1) is 5mm～6mm, and described Circularhole diameter is 4mm～6mm, and adjacent two hole pitch are 0.8mm～1.0mm.

6. according to the arbitrary described air inlet rectifying device of claim 1 to 3, it is characterized in that:

Described sensor fitting seat (4) median plane is at least 45mm to the distance of described current plate (1).

7. air inlet rectifying device according to claim 4 is characterized in that: the center of described sensor fitting seat (4) is at least 20mm to the distance of the outer wall of sensor fitting seat (4).

8. air inlet rectifying device according to claim 3 is characterized in that: described fire prevention guard (2) is made by wire, the size of mesh 2mm of described fire prevention guard (2), described wire diameter 0.25mm.

9. automotive air intake system, comprise suction tude (12), direction according to air inlet in described suction tude (12) is placed with air-strainer (11) and air flow sensor (13) successively, it is characterized in that: also comprise current plate (1), described current plate (1) is arranged in the suction tude (12) between described air-strainer (11) and the air flow sensor (13).

10. automotive air intake according to claim 9 system is characterized in that: also comprise fire prevention guard (1), described fire prevention guard (1) is arranged in described air flow sensor (13) suction tude (12) afterwards.

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