An engine high altitude intake simulation device

Abstract

The present application belongs to the field of internal combustion engine system, and discloses an engine high-altitude air intake simulation device.The engine high-altitude air intake simulation device comprises an air intake pipe, a gas release valve shell, a bushing, a valve core, a control pipeline and a bellows.When air intake adjustment is not needed, the air intake pipe, the gas release valve shell, the bushing and the valve core are integrated and tightly matched to accurately maintain the air intake amount; when air intake adjustment is needed, the vibration source (the air intake pipe and the gas release valve shell) is connected with the control part (the bushing and the valve core) in a soft manner, the vibration of the air intake pipe is used to synchronously vibrate the bushing and the valve core, the dislocation of the second channel and the third channel is avoided, and the accurate adjustment of the air intake amount can be realized.Through reasonable design and matching, the gas release flow area is changed, the gas release amount is changed, different altitude air intake adjustment can be realized, mechanical control is adopted, electronic control is not needed, and the structure is simple and reliable; the torque required by the simulation device during adjustment is small, and the adjustment can be easily realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of internal combustion engine system, and particularly relates to a high-altitude intake simulation device for a supercharged engine. BACKGROUND

[0002] The special environment of plateau puts forward special requirements for the use of vehicles in plateau areas. For engine high-altitude performance research, generally, verification is carried out in a plateau simulation cabin or a plateau field, and the required cost is high.

[0003] When performance research and reliability check are carried out in an ordinary engine test room, if the supercharged engine adopts the intake valve bleeding way, the pressure after supercharging is equivalent to the plateau condition, the combustion and performance can be pre-calibrated to a certain extent, the rules of combustion and performance change are found out, and thus the cost expenditure is greatly reduced. The engine has the characteristics of strong vibration during operation, and how to realize reliable operation of the intake valve bleeding under complex environmental conditions and rapid adjustment becomes a problem to be solved. SUMMARY

[0004] In order to solve the problem that the engine is difficult to be stably adjusted due to vibration when the engine adopts the intake valve bleeding way, the present application provides a high-altitude intake simulation device for an engine, which can realize accurate maintenance and adjustment of the intake amount under the condition of strong vibration of the engine intake pipe, does not need electronic equipment, and has low cost.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A high-altitude intake simulation device for an engine, comprising an intake pipe 1, a bleeding valve shell 3, a bushing 5, a valve core 8, a control pipeline 9, a first bellows 7 and a second bellows 10.

[0007] The side surface of the intake pipe 1 is fixedly connected with the bleeding valve shell 3, the bleeding valve shell 3 is a cavity structure with through holes designed at both ends, an intake pipe bleeding port 2 is formed in the side wall of the intake pipe 1 and the bleeding valve shell 3, and the intake pipe bleeding port 2 is in communication with the through hole in the left end surface of the bleeding valve shell 3.

[0008] The bushing 5 is arranged in the bleeding valve shell 3, the left end of the bushing 5 is in contact with the left inner wall surface of the bleeding valve shell 3 through a conical sealing surface, and the right end of the bushing 5 is in contact with the right inner wall surface of the bleeding valve shell 3 through the first bellows 7; the first channel 4 and the second channel 6 are arranged on the side wall of the bushing 5 in a spaced manner.

[0009] The cavity between the bleeding valve shell 3, the bushing 5 and the first bellows 7 constitutes an air chamber 12.

[0010] The liner 5 is sleeved with a valve core 8 which is a cylindrical structure with one end open. The contact surface between the liner 5 and the valve core 8 is sealed by a stopper 11. The left end surface of the liner 5 is located between the first channel 4 and the second channel 6. The side wall of the valve core 8 is provided with a third channel 13. The valve core 8 can rotate radially relative to the liner 5. During the rotation, the third channel 13 and the second channel 6 on the liner 5 cooperate with each other and the flow area changes. The right open end surface of the valve core 8 is connected with a control pipeline 9 through a second bellows 10.

[0011] The gas flow in the air inlet pipe 1 can communicate with the external atmosphere through the air inlet pipe air outlet 2, the first channel 4, the air cavity 12, the second channel 6 and the third channel 13.

[0012] Further, the first bellows 7 is connected with the air outlet valve shell 3 in a sealed manner by means of a clamp or welding.

[0013] Further, the second bellows 10 is connected with the control pipeline 9 in a sealed manner by means of a clamp or welding.

[0014] Further, the control pipeline 9 is subjected to a leftward force. Under the action of the force, the second bellows 10 is in a strong compression state. The valve core 8 drives the liner 5 to move leftward through the stopper 11 until the left end of the liner 5 contacts the left inner wall of the air outlet valve shell 3 through a tapered sealing surface. At this time, the first bellows 7 is in a stretched state. The gas flow in the air inlet pipe 1 communicates with the external atmosphere through the air inlet pipe air outlet 2, the first channel 4, the air cavity 12, the second channel 6 and the third channel 13, thereby realizing the reduction of the air intake.

[0015] Further, the method for adjusting the air intake is as follows:

[0016] A rightward force is applied to the control pipeline 9. Under the action of the force, on the one hand, the length of the second bellows 10 increases but it is still in a compression state. The leftward force of the second bellows 10 on the valve core 8 and the rightward force of the air flow on the valve core 8 are close to or equal to each other, so that the stopper 11 is in a free state and there is no obvious axial force between the valve core 8 and the liner 5. On the other hand, the length of the first bellows 7 is shortened and it is in a compression state. The leftward force of the first bellows 7 on the liner 5 and the rightward force of the air flow on the liner 5 are close to or equal to each other, so that the left end of the liner 5 is away from the air outlet valve shell 3. By adjusting the rotation angle of the control pipeline 9, the rotation of the valve core 8 driven by the second bellows 10 can be realized, thereby changing the cooperation relationship between the third channel 13 and the second channel 6. The overlapping area of the two channels changes, the flow area changes, and finally the air outlet amount changes.

[0017] Further, the vibration of the air inlet pipe 1 will synchronously vibrate the bushing 5 and the valve core 8, avoiding the misalignment of the second channel 6 and the third channel 13, and realizing the accurate maintenance of the air volume adjustment.

[0018] Further, the valve core 8 and the control pipeline 9 are connected by the bellows, and the vibration of the valve core 8 has less influence on the control pipeline 9, avoiding the damage of the control pipeline.

[0019] Advantages of the present application:

[0020] 1. The present application utilizes the vibration of the air inlet pipe to synchronously vibrate the bushing 5 and the valve core 8, avoiding the misalignment of the second channel 6 and the third channel 13, and realizing the accurate maintenance of the air volume adjustment.

[0021] 2. The present application can realize the air inlet adjustment at different altitudes by reasonably designing and matching the change of the air discharge flow area and the change of the air discharge volume, without the need of electronic control.

[0022] 3. The present application has small required torque during the adjustment of the simulation device, and can be easily adjusted. DETAILED DESCRIPTION

[0023] The drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0024] Figure 1 is a schematic view of the engine high-altitude air inlet simulation device in a non-adjustment state according to the present application;

[0025] Figure 2 is a schematic view of the engine high-altitude air inlet simulation device in an adjustment state according to the present application;

[0026] Figure 3 is Figure 1 the third channel 13 and the second channel 6 in the description of the present application.

[0027] Explanation of reference signs:

[0028] 1. air inlet pipe, 2. air inlet pipe air discharge port, 3. air discharge valve shell, 4. first channel, 5. bushing, 6. second channel, 7. first bellows, 8. valve core, 9. control pipeline, 10. second bellows, 11. check ring, 12. air cavity, 13. third channel. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and not indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0031] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0032] The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0033] The working process of the present embodiment is as follows:

[0034] Referring to Figure 1 An engine high-altitude intake simulation device comprises an intake pipe 1, a discharge valve housing 3, a bushing 5, a valve core 8, a control pipeline 9, a first bellows 7, a second bellows 10; the side of the intake pipe 1 is fixedly connected with the discharge valve housing 3, the discharge valve housing 3 is a cavity structure designed with open holes at both ends, an intake pipe discharge port 2 is opened on the connecting side wall of the intake pipe 1 and the discharge valve housing 3, the intake pipe discharge port 2 is communicated with the through hole on the left end face of the discharge valve housing 3, the bushing 5 is arranged in the discharge valve housing 3, the left end of the bushing 5 is in contact with the left inner wall surface of the discharge valve housing 3 through a conical sealing surface, and the right end of the bushing 5 is in contact with the right inner wall surface of the discharge valve housing 3 through the first bellows 7; the discharge valve housing 3, the bushing 5 and the first bellows 7 form an air cavity 12;

[0035] The side wall of the bushing 5 is provided with a first channel 4 and a second channel 6;

[0036] The bushing 5 houses a valve core 8, which is a cylindrical structure with one open end. The contact surface between the bushing 5 and the valve core 8 is sealed by a retaining ring 11. The left end face of the bushing 5 is located between the first channel 4 and the second channel 6. The side wall of the valve core 8 is provided with a third channel 13. The valve core 8 can rotate radially relative to the bushing 5. During rotation, the third channel 13 cooperates with the second channel 6 on the bushing 5, and the flow area changes. The open end face of the valve core 8 on the right side is connected to the control pipeline 9 through a second bellows 10.

[0037] The outer wall of the air intake pipe 1 is provided with an air intake pipe vent 2. The airflow in the air intake pipe 1 can communicate with the external atmospheric environment through the air intake pipe vent 2, the first channel 4, the air chamber 12, the second channel 6, and the third channel 13 respectively.

[0038] The first bellows 7 is used to seal the bushing 5 to the vent valve housing 3 by means of clamps or welding to prevent air leakage.

[0039] The second bellows 10 uses clamps or welding to seal the valve core 8 and the control pipeline 9 to prevent air leakage.

[0040] like Figure 1 As shown, the control pipe 9 is subjected to a leftward force. Under this force, the second bellows 10 is in a strongly compressed state. The valve core 8 drives the bushing 5 to move to the left through the retaining ring 11 until the left end of the bushing 5 contacts the inner wall of the left side of the vent valve housing 3 through the conical sealing surface. At this time, the first bellows 7 is in a stretched state. The airflow in the intake pipe 1 is connected to the external atmospheric environment through the intake pipe vent 2, the first channel 4, the air chamber 12, the second channel 6, and the third channel 13, respectively, thereby reducing the intake volume. The vibration of the intake pipe 1 will cause the bushing 5 and the valve core 8 to vibrate synchronously, avoiding misalignment of the second channel 6 and the third channel 13, and achieving precise maintenance of the air volume. At the same time, since the valve core 8 and the control pipe 9 are connected by a bellows, the vibration of the valve core 8 has little impact on the control pipe 9, avoiding damage to the control pipe.

[0041] When air intake adjustment is required, such as Figure 2As shown, a rightward force is applied to the control pipeline 9, under the action of which, on the one hand, the length of the second bellows 10 is increased but still in a compressed state, the leftward force of the second bellows 10 on the valve core 8 is close to or equal to the rightward force of the intake airflow on the valve core 8, so that the blocking ring 11 is in a free state, and there is no obvious axial force between the valve core 8 and the bushing 5; on the other hand, the length of the first bellows 7 is shortened and is in a compressed state, the leftward force of the first bellows 7 on the bushing 5 is close to or equal to the rightward force of the intake airflow on the bushing 5, and the left end of the bushing 5 is away from the air release valve shell 3.

[0042] In the above state, on the one hand, because the left end of the bushing 5 is away from the air release valve shell 3, and only the first bellows 7 is connected with the air release valve shell 3, the influence of strong vibration of the engine on the bushing 5 is greatly reduced; on the other hand, because there is no obvious axial force between the valve core 8 and the bushing 5, the friction between them is greatly reduced, at this time, by adjusting the rotation angle of the control pipeline 9, the rotation of the valve core 8 can be easily driven by the second bellows 10, so as to change the relationship between the third channel 13 and the second channel 6. Figure 3 As shown, the overlapping area of the two channels is changed, the flow area is changed, and finally the air release amount is changed.

[0043] In summary, when the intake air is not needed to be adjusted, the intake pipe, the air release valve shell, the bushing and the valve core are integrated and closely matched to accurately maintain the intake air amount; when the intake air needs to be adjusted, the vibration source (the intake pipe and the air release valve shell) and the control part (the bushing and the valve core) are soft-connected, so that the intake air amount can be accurately adjusted.

[0044] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An engine high altitude intake simulation device, comprising: The air inlet pipe (1), the air exhaust valve shell (3), the bushing (5), the valve core (8), the control pipeline (9), the first bellow (7) and the second bellow (10) are arranged in sequence. The air inlet pipe (1) is fixedly connected with the air exhaust valve shell (3) on the side surface, and the air exhaust valve shell (3) is a cavity structure with open holes at two opposite ends. The bushing (5) is arranged in the air exhaust valve shell (3), and the left end of the bushing (5) is in contact with the left inner wall surface of the air exhaust valve shell (3) through a conical sealing surface, and the right end of the bushing (5) is in contact with the right inner wall surface of the air exhaust valve shell (3) through the first bellow (7). The cavity between the air exhaust valve shell (3), the bushing (5) and the first bellow (7) constitutes an air cavity (12). The valve core (8) is sleeved in the bushing (5), the valve core (8) is a cylindrical structure with an open left end, the contact surface between the bushing (5) and the valve core (8) is sealed by a check ring (11), the left end surface of the bushing (5) is located between the first channel (4) and the second channel (6), the side wall of the valve core (8) is provided with a third channel (13), the valve core (8) can rotate radially relative to the bushing (5), in the rotating process, the third channel (13) and the second channel (6) on the bushing (5) are matched with each other, and the flow area changes, and the right open end surface of the valve core (8) is connected with the control pipeline (9) through the second bellow (10). The airflow in the air inlet pipe (1) can be communicated with the external atmosphere through the air inlet pipe air exhaust port (2), the first channel (4), the air cavity (12), the second channel (6) and the third channel (13).

2. The engine high altitude intake simulation device of claim 1, wherein, The first bellow (7) is connected with the bushing (5) and the air exhaust valve shell (3) by a clamp or welding.

3. The engine high altitude induction simulation device of claim 1, wherein, The second bellow (10) is connected with the valve core (8) and the control pipeline (9) by a clamp or welding.

4. The engine high altitude induction simulation device of claim 1, wherein, The control pipeline (9) is subjected to a leftward force, under the action of the force, the second bellow (10) is in a strong compression state, the bushing (5) is driven by the check ring (11) to move leftward, until the left end of the bushing (5) is in contact with the left inner wall of the air exhaust valve shell (3) through the conical sealing surface, at this time, the first bellow (7) is in a stretching state, the airflow in the air inlet pipe (1) is communicated with the external atmosphere through the air inlet pipe air exhaust port (2), the first channel (4), the air cavity (12), the second channel (6) and the third channel (13), and the air intake is reduced.

5. The engine high altitude induction simulation device of claim 1, wherein, The method for adjusting the air intake is as follows: When the control pipeline (9) is given a right force, the length of the second bellows (10) increases but is still in compression, the left force of the second bellows (10) to the valve core (8) is close to or equal to the right force of the intake airflow to the valve core (8), the check ring (11) is in a free state, and there is no obvious axial force between the valve core (8) and the bushing (5); on the other hand, the length of the first bellows (7) is shortened and is in compression, the left force of the first bellows (7) to the bushing (5) is close to or equal to the right force of the intake airflow to the bushing (5), and the left end of the bushing (5) is away from the air release valve shell (3); by adjusting the rotation angle of the control pipeline (9), the rotation of the valve core (8) driven by the second bellows (10) can be realized, thereby changing the relationship between the third channel (13) and the second channel (6), changing the overlapping area of the two channels, changing the flow area, and finally changing the air release amount.

6. The engine high altitude induction simulation device of claim 1, wherein, The vibration of the intake pipe (1) synchronously vibrates the bushing (5) and the valve core (8), avoids the misalignment of the second channel (6) and the third channel (13), and realizes the accurate maintenance of the air amount.

7. The engine high altitude induction simulation device of claim 1, wherein, The valve core (8) and the control pipeline (9) are connected by bellows, the vibration of the valve core (8) has little effect on the control pipeline (9), and the damage of the control pipeline is avoided.

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