An engine intake and exhaust highland simulation test auxiliary device

Abstract

The application discloses an engine intake and exhaust plateau simulation test auxiliary device, which comprises an ECU wire harness, an ECU, a sealed box body, an adjustable intake mechanism for adjusting the pressure in the sealed box body, a controller, a pressure sensor for monitoring the pressure signal in the sealed box body, and an adjustable exhaust mechanism capable of automatically switching the exhaust pipeline; an adjustable fixing frame is arranged in the sealed box body, and the ECU is installed on the fixing frame; one side wall of the sealed box body is connected with the adjustable intake mechanism; and the adjustable exhaust mechanism is connected with the controller. The application can meet the requirement of ECU identification of high-altitude test by using the environment simulation mode without ECU calibration files and calibration technicians; and the manual switching mode of the exhaust pipeline can be improved, the exhaust pipeline is automatically replaced according to the selected altitude by the controller, the test efficiency is effectively improved, and the risk of personnel operation is reduced.

Description

Technical Field

[0001] This invention belongs to the field of engine testing technology, and particularly relates to an auxiliary ECU environmental pressure identification and bench exhaust pipe switching test device for engine simulated high-altitude testing, specifically an auxiliary device for engine intake and exhaust high-altitude simulation testing. Background Technology

[0002] Altitude simulation engine testing is an important testing method designed to simulate the actual operating conditions of engines at high altitudes in order to evaluate their performance and reliability under these conditions. In altitude simulation tests, researchers adjust parameters of the test bench, such as air pressure and temperature, to simulate environmental conditions at different altitudes. By changing these parameters, the engine can be made to operate under similar conditions in the laboratory. Testing and evaluating the engine's performance and reliability at different altitudes provides valuable references and data for designing and optimizing engines for high-altitude environments.

[0003] Engine laboratory altitude simulation typically employs intake and exhaust altitude simulation. However, this method has two main drawbacks. First, by using only intake and exhaust altitude simulation, the engine ECU remains exposed to the laboratory environment. The pressure sensors integrated with the engine ECU circuitry cannot effectively recognize the simulated altitude, leading to ineffective correction of engine calibration data. Laboratory testing usually involves using calibration software to assign values ​​to the sensors. However, this approach requires ECU calibration documentation and technical support, which cannot meet all testing needs. Second, altitude simulation systems consume significant power. For routine local altitude tests, manual switching of exhaust pipe channels and exhaust gas sampling probe positions is necessary. Switching between different altitudes is time-consuming and labor-intensive, impacting test progress. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art regarding ECU environmental pressure identification and exhaust pipe switching in current laboratory high-altitude simulation of intake and exhaust, and to provide an auxiliary device for engine intake and exhaust high-altitude simulation test.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] An auxiliary device for simulating high-altitude engine intake and exhaust tests includes an ECU wiring harness, an ECU, a sealed housing, an adjustable intake mechanism for adjusting the pressure inside the sealed housing, a controller, a pressure sensor for monitoring the pressure signal inside the sealed housing, and an adjustable exhaust mechanism capable of automatically switching exhaust pipes.

[0007] An adjustable mounting bracket is provided inside the sealed enclosure. The ECU is mounted on the adjustable mounting bracket. One end of the ECU is connected to an ECU wiring harness, and the other end of the ECU wiring harness passes through the side wall of the sealed enclosure.

[0008] One side wall of the sealed chamber is connected to an adjustable air intake mechanism, and a pressure sensor is installed inside. The controller is connected to the adjustable air intake mechanism and the pressure sensor. The controller receives the pressure signal collected by the pressure sensor and controls the adjustable air intake mechanism to adjust the pressure inside the sealed chamber.

[0009] The adjustable exhaust mechanism is connected to the controller, and the controller controls the adjustable exhaust mechanism to automatically switch the exhaust pipe.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. It can meet the ECU's high-altitude recognition test requirements by using environmental simulation, even without ECU calibration documents and calibration technicians;

[0012] 2. The current method of manually switching exhaust pipes can be improved by having the controller automatically switch exhaust pipes according to the selected altitude, which can effectively improve test efficiency and reduce the risk of personnel operation. Attached Figure Description

[0013] Figure 1 The diagram shown is a structural schematic of an embodiment of this application;

[0014] Figure 2 The diagram shown is a schematic representation of the sealing ring in an embodiment of this application.

[0015] In the diagram, 1. ECU wiring harness; 2. Sealing ring; 3. Sealing rubber; 4. Sealed enclosure; 5. Hinge; 6. Longitudinal guide rail; 7. Fixing bolt; 8. ECU; 9. Transverse guide rail; 10. Enclosure cover; 11. Sealing strip; 12. Pressure sensor; 13. Intake passage; 14. Throttle valve; 15. Intake air conditioning connection pipe; 16. Movable articulated arm; 17. Bracket; 18. Telescopic single rod; 19. Turntable bearing; 20. Controller; 21. Exhaust gas sampling probe; 22. Exhaust pipe; 23. Valve motor; 24. Valve baffle; 25. Conventional exhaust pipe; 26. Altitude control exhaust pipe. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or a communication transmission connection via signal lines or power lines, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0019] Figure 1 The diagram shown is a structural schematic of an embodiment of this application; Figure 2 The diagram shown is a schematic representation of the sealing ring in an embodiment of this application.

[0020] This invention provides an auxiliary device for simulating high-altitude engine intake and exhaust, including an ECU wiring harness 1, an ECU 8, a sealed housing 4, an adjustable intake mechanism for adjusting the pressure inside the sealed housing 4, a controller 20, a pressure sensor 12 for monitoring the pressure signal inside the sealed housing 4, and an adjustable exhaust mechanism capable of automatically switching the exhaust pipe.

[0021] An adjustable mounting bracket is provided inside the sealed enclosure 4. The ECU 8 is mounted on the adjustable mounting bracket. One end of the ECU 8 is connected to one end of the ECU wiring harness 1, and the other end of the ECU wiring harness 1 passes through the side wall of the sealed enclosure 4.

[0022] One side wall of the sealed box 4 is connected to an adjustable air intake mechanism, and a pressure sensor 12 is provided inside. The controller 20 is connected to the adjustable air intake mechanism and the pressure sensor 12. The controller 20 receives the pressure signal collected by the pressure sensor 12 and controls the adjustable air intake mechanism to adjust the pressure inside the sealed box 4.

[0023] The adjustable exhaust mechanism is connected to the controller 20, and the controller 20 controls the adjustable exhaust mechanism to automatically switch the exhaust pipe.

[0024] It should be noted that the sealed enclosure 4 is a relatively enclosed space for the ECU8, which can create the required environmental pressure within the sealed enclosure.

[0025] The beneficial effects of this invention are:

[0026] 1. It can meet the ECU's high-altitude recognition test requirements by using environmental simulation, even without ECU calibration documents and calibration technicians;

[0027] 2. The current method of manually switching exhaust pipes can be improved by having the controller automatically switch exhaust pipes according to the selected altitude, which can effectively improve test efficiency and reduce the risk of personnel operation.

[0028] Preferably, the adjustable air intake mechanism includes an air intake passage 13, a throttle valve 14, and an air intake air conditioning connection pipe 15; one end of the air intake passage 13 is connected to the interior of the sealed chamber 4, and the other end is connected to the laboratory air intake air conditioner through a throttle valve 4 and an air intake air conditioning connection pipe; the controller 20 controls the opening of the throttle valve 14 and adjusts the pressure inside the sealed chamber 4 according to the altitude of the target test.

[0029] It should be noted that the air intake passage 13 can be welded to the sealed housing 4.

[0030] Preferably, the adjustable exhaust mechanism adopts a structure in the prior art, or adopts the following structure: including an exhaust pipe 22, a conventional exhaust pipe 25 and an altitude control exhaust pipe 26, a valve motor 23, and a valve baffle 24, wherein the valve motor 23 is connected to the controller 20;

[0031] One end of the exhaust pipe 22 is connected to the engine exhaust pipe, and the other end is connected to the conventional exhaust pipe 25 and the altitude control exhaust pipe 26. A valve motor 23 is provided between the conventional exhaust pipe 25 and the altitude control exhaust pipe 26. The valve motor 23 controls the valve baffle 24 to swing, thereby switching the position of the valve baffle 24 to block the conventional exhaust pipe 25 or the altitude control exhaust pipe 26 according to the usage requirements.

[0032] Preferably, the exhaust pipe 22 is provided with an exhaust gas sampling probe 21 for sampling the gas in the pipe.

[0033] Preferably, the adjustable fixing frame has the following structure: it includes a longitudinal guide rail 6 and a transverse guide rail 9;

[0034] There are two longitudinal guide rails 6, and both ends of the two longitudinal guide rails 6 are connected to the sealed box 4. A first notch is machined in the middle. A second notch is machined in a part of the transverse guide rail 9. The longitudinal guide rail 6 and the transverse guide rail 9 are fixedly connected by fixing bolts 7 that connect the first notch and the second notch and connect the transverse guide rail and the first notch. The transverse guide rail 9 is connected to the ECU 8 by bolts.

[0035] It should be noted that the upper and lower ends of the longitudinal guide rail 6 can be fixedly connected to the sealed box 4 by welding or other means.

[0036] It should be noted that the position of the transverse guide rail can be flexibly moved according to the different bolt hole positions of the ECU8 to meet the requirements of fixing the ECU8 inside the sealed housing 4. In this embodiment, eight bolt holes are machined on the transverse guide rail 9, four of which are connected to the holes on the ECU8 housing, and the remaining four are connected to the longitudinal guide rail 6.

[0037] Preferably, the auxiliary device further includes a box support for supporting the sealed box 4.

[0038] It should be noted that the box support can adopt the existing structure that can adjust the angle and rotate, or it can adopt the following structure: including movable joint arm 16, support 17, telescopic single rod 18, and turntable bearing 19. These four parts cooperate with each other. According to the position of the sealed box 4, the support 17 can be fixed to the ground or wall. The movable joint arm 16 and the telescopic single rod 18 can adjust the angle of the support. In addition, the turntable bearing 19 can rotate the direction of the support. The turntable bearing 19 can withstand axial load and radial load well.

[0039] Preferably, one end face of the sealed box 4 is a box cover 10, and one end of the box cover 10 is connected to the sealed box 4 via a hinge 5; a sealing strip 11 is embedded in the part where the box cover 10 is connected to the sealed box 4.

[0040] It should be noted that after the ECU8 is placed inside the sealed enclosure 4, the enclosure cover 10 and the sealing strip 11 embedded in the cover seal the enclosure. Because it is in a high-altitude simulated state, when the interior of the sealed enclosure 4 is under negative pressure at high altitude, the atmospheric pressure difference can hold the enclosure cover 10 in place. The enclosure cover 10 is connected to the sealed enclosure 4 on one side by two hinges, and a snap-on switch can be added to the other end if necessary. The pressure sensor 12 installed inside the sealed enclosure 4 monitors the pressure environment inside the enclosure and transmits the pressure data to the controller 20 for processing.

[0041] Preferably, a sealing rubber 3 is sleeved on the ECU wiring harness 1, the part of which is sleeved with the sealing rubber 3 passes through the side wall of the sealed housing 4, and a sealing ring 2 for sealing is provided between the sealing rubber 3 and the sealed housing 4.

[0042] It should be noted that the controller 20 in this embodiment has two main functions. First, it is responsible for the power supply and communication of the entire device. The controller 20 receives the input target altitude and data from the pressure sensor 12 inside the chamber, and controls the opening of the throttle valve 14 to ensure the pressure inside the chamber meets the target altitude requirement. Second, when the target altitude is 0 or in the initial state, it controls the valve motor 23, which in turn controls the valve baffle 24, to block the altitude control exhaust pipe 26. When the target altitude is input, it controls the valve motor 23, which in turn controls the valve baffle 24, to block the conventional exhaust pipe passage 25. It should be noted that the specific connection structure between the valve motor 23 and the valve baffle 24 adopts a structure from the prior art; as long as the function is achieved, it is acceptable and will not be detailed here.

[0043] The present invention provides an auxiliary device for simulating high-altitude engine intake and exhaust tests, which can be implemented in the following manner:

[0044] 1. Wrap the sealing rubber 3 around the appropriate position on the ECU wiring harness 1 of the engine to be tested, place the wiring harness connector in the sealed box 4, and seal the sealing rubber 3 and the ECU wiring harness 1 channel with the sealing ring 2.

[0045] 2. Adjust the position of the transverse guide rail 9 by sliding it according to the position of the bolt holes on the ECU8 housing. Align the four bolt holes on the right side of the transverse guide rail 9 with the bolt holes on the ECU8 housing. Connect them with fixing bolts 7. Install the fixing bolts 7 of the transverse guide rail 9 and the longitudinal guide rail 6 according to their positions.

[0046] 3. Adjust the position of the box cover 10 and the sealing strip 11 to seal the box cover 10;

[0047] 4. Based on the arrangement of the sealed box 4 and the platform, install the box bracket, which can be installed on the ground or fixed on the wall. Adjust the telescopic single rod 18 and the turntable bearing 19 of the mounting bracket to the appropriate position.

[0048] 5. Open the adjustable air intake mechanism, input the target altitude (the default altitude is 0), select the appropriate position for valve baffle 24 according to the altitude, and adjust throttle valve 14 according to the data from pressure sensor 12. Refer to the altitude and pressure comparison table, as shown in Table 1:

[0049] 6. Conduct bench tests.

[0050] Table 1. Correspondence between reference altitude and pressure

[0051] 0 101.3 2000 79.5 100 100.1 2200 77.5 200 98.9 2400 75.6 300 97.8 2600 73.7 400 96.6 2800 71.9 500 95.5 3000 70.1 600 94.3 3200 68.3 800 92.1 3400 66.6 1000 89.9 3600 64.9 1200 87.7 3800 63.3 1400 85.6 4000 61.6 1600 83.5 5000 54.0 1800 81.5 6000 47.2

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for simulating high-altitude engine intake and exhaust tests, characterized in that, Includes ECU wiring harness (1), ECU (8) and sealed housing (4), adjustable intake mechanism for adjusting the pressure inside the sealed housing (4), controller (20), pressure sensor (12) for monitoring the pressure signal inside the sealed housing (4), and adjustable exhaust mechanism capable of automatically switching exhaust pipes; An adjustable fixing frame is provided inside the sealed box (4), and the ECU (8) is installed on the adjustable fixing frame. The ECU (8) is connected to one end of the ECU wiring harness (1), and the other end of the ECU wiring harness (1) can pass through the side wall of the sealed box (4) through the sealing ring (2). The sealed box (4) has one side wall connected to an adjustable air intake mechanism, and a pressure sensor (12) is provided inside. The controller (20) is connected to the adjustable air intake mechanism and the pressure sensor (12). The controller (20) receives the pressure signal collected by the pressure sensor (12) and controls the adjustable air intake mechanism to adjust the pressure inside the sealed box (4). The adjustable exhaust mechanism is connected to the controller (20), and the controller (20) controls the adjustable exhaust mechanism to automatically switch the exhaust pipeline; The adjustable exhaust mechanism includes an exhaust pipe (22), a conventional exhaust pipe (25), an altitude control exhaust pipe (26), a valve motor (23), and a valve baffle (24). The valve motor (23) is connected to the controller (20). One end of the exhaust pipe (22) is connected to the engine exhaust pipe, and the other end is connected to the conventional exhaust pipe (25) and the altitude control exhaust pipe (26). A valve motor (23) is provided between the conventional exhaust pipe (25) and the altitude control exhaust pipe (26). The valve motor (23) controls the valve baffle (24) to swing, thereby switching the position of the valve baffle (24) to block the conventional exhaust pipe (25) or the altitude control exhaust pipe (26) according to the usage requirements.

2. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, The adjustable air intake mechanism includes an air intake passage (13), a throttle valve (14), and an air intake air conditioning connection pipe (15). One end of the air intake passage (13) is connected to the sealed chamber (4), and the other end is connected to the laboratory air intake air conditioner through a throttle valve (14) and an air intake air conditioning connection pipe. The controller (20) controls the opening of the throttle valve (14) and adjusts the pressure inside the sealed chamber (4) according to the altitude of the target test.

3. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, The exhaust pipe (22) is equipped with an exhaust gas sampling probe (21) for sampling the gas in the pipe.

4. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, The adjustable fixing frame includes a longitudinal guide rail (6) and a transverse guide rail (9). The longitudinal guide rail (6) consists of two rails, both ends of which are connected to the sealed box (4). A first notch is machined in the middle of the rails. A second notch is machined in a part of the transverse guide rail (9). The longitudinal guide rail (6) and the transverse guide rail (9) are fixedly connected by connecting the first and second notches and by fixing bolts (7) connecting the transverse guide rail and the first notch. The transverse guide rail (9) is connected to the ECU (8) by bolts.

5. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, It also includes a box support for supporting the sealed box (4).

6. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, One end face of the sealed box (4) is the box cover (10), and one end of the box cover (10) is connected to the sealed box (4) by a hinge (5); a sealing strip (11) is embedded in the part where the box cover (10) is connected to the sealed box (4).

7. The auxiliary device for simulating high-altitude engine intake and exhaust tests according to claim 1, characterized in that, The ECU wiring harness (1) is fitted with a sealing rubber (3), and the part fitted with the sealing rubber (3) passes through the side wall of the sealed box (4). A sealing ring (2) for sealing is provided between the sealing rubber (3) and the sealed box (4).

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