Engine coolant consumption testing device and testing method thereof

Abstract

The invention discloses an engine coolant consumption testing device and a testing method thereof, and belongs to the technical field of engine testing. The device comprises a detection machine table, a feedback support is arranged at the top of one end of the detection machine table, an expansion detection ball and a water supplementing detection ball are arranged on a sliding rod on the feedback support, a pressure relief pipe column is arranged at the top of the expansion detection ball, and a pressure cover sleeves the top of the pressure relief pipe column; according to the invention, real-time visual monitoring and accurate quantitative calculation of the consumption of the engine coolant are realized, abnormal consumption of the coolant can be rapidly discriminated to trigger timely maintenance, and direct data support can be provided for scientific formulation of a maintenance and supplement period of the coolant; ineffective loss caused by gasification and pressure fluctuation of the cooling liquid in the testing process is greatly reduced, the accuracy of consumption testing is improved, and meanwhile the testing result can directly provide a key reference basis for capacity optimization design of upper and lower scribed lines of the auxiliary water tank of the engine.

Description

Technical Field

[0001] This invention relates to the field of engine testing technology, specifically to an engine coolant consumption testing device and its testing method. Background Technology

[0002] The engine is the core power unit of a car, converting the chemical energy of fuel into mechanical energy to provide driving power for the vehicle; it is figuratively called the heart of the car, determining the vehicle's power, economy, and environmental performance. Coolant, also known as antifreeze coolant, is the heat transfer medium circulating in the engine cooling system and is hailed as the blood of the engine. During engine operation, the engine will continuously consume coolant due to high-temperature vaporization, natural evaporation, and slow leakage. However, the amount of coolant consumed is relatively small. During regular vehicle maintenance, the engine coolant needs to be checked, and if the coolant level is below the lower mark, it needs to be replenished in time. It is not easy to detect abnormal coolant consumption during vehicle operation.

[0003] In light of the above, it should be noted that the Chinese patent application CN202122337947X, which discloses a coolant level alarm device for automotive internal combustion engines, can only provide an alarm function when the coolant level is below the detection level via a float level switch. It cannot perform real-time and accurate quantitative monitoring of coolant consumption during engine testing, nor can it provide data support for determining coolant replenishment cycles. Furthermore, it lacks effective means of identifying abnormal consumption and cannot provide a reference for the design of the engine's auxiliary water tank capacity, making it difficult to meet the actual needs of engine cooling system performance optimization and routine maintenance.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an engine coolant consumption testing device and method to solve the problems mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an engine coolant consumption testing device, comprising a testing machine, a feedback bracket is provided at the top of one end of the testing machine, an expansion detection ball and a water replenishment detection ball are provided on the sliding rod of the feedback bracket, a pressure relief pipe is provided at the top of the expansion detection ball, a pressure cover is sleeved on the top of the pressure relief pipe, and an outer detection cover barrel that cooperates with and connects to the pressure cover is sleeved on the outer periphery of the pressure relief pipe;

[0007] The pressure cap has a splicing cylinder at its bottom that slides inside the pressure relief pipe. Inside the splicing cylinder is a reflux cone that is connected to the inner cavity of the expansion detection ball. The top of the reflux cone has an upper cone that extends into the splicing cylinder and is fixed in place. The bottom center of the reflux cone has a lower cone that slides inside the splicing cylinder.

[0008] Furthermore, multiple sets of symmetrical engine mounting brackets are provided on the inner bottom wall of the end of the testing machine away from the feedback bracket. A cooling fan located below the feedback bracket is provided at one end of the engine mounting bracket. Multiple sets of water tanks are provided on the side of the cooling fan. Several sets of heat dissipation holes are provided around the perimeter of the testing machine body.

[0009] Furthermore, the feedback bracket has a recessed slide rail at one end facing the expansion detection ball. Both the expansion detection ball and the water replenishment detection ball have fixing blocks on their outer walls that cooperate with the slide rail. The fixing blocks are limited to the slide rail by bolts. The expansion detection ball is mainly used as a buffer space when the engine coolant expands due to heat, and at the same time receives coolant and air bubbles from the degassing port of the engine and water tank. The water replenishment detection ball is used to replenish coolant to the engine.

[0010] Furthermore, multiple sets of degassing pipes are provided on the outer wall of the end of the expansion detection ball away from the feedback bracket. These multiple sets of degassing pipes are respectively connected to the detection engine retaining sleeve adapted on the water tank and engine mounting bracket. A liquid injection port is provided on the top of one side of the expansion detection ball, and a removable sealing cap is provided on the top of the liquid injection port. A water replenishment pipe is provided at the bottom of the water replenishment detection ball, which is connected to the detection engine and water tank retaining pipe. An intermediate measuring cylinder is provided at the top of the water replenishment detection ball, which is fitted and limited with the expansion detection ball. The surface of the intermediate measuring cylinder is provided with scale lines, and there is a scale line in the middle of the intermediate measuring cylinder for real-time observation of the coolant level.

[0011] Furthermore, the bottom of the pressure relief column is sealed and sleeved with the center of the top of the expansion detection ball. The top of the pressure relief column is provided with an annular platform that cooperates with the pressure cap. Side pressure relief ports located below the annular platform are symmetrically opened on both sides of the top of the pressure relief column. Side sealing frames are symmetrically arranged on the outer walls of both ends of the pressure relief column. Inside the side sealing frame, there is a sleeve that is vertically installed and sleeved and limited to the annular platform. A pull rod is slidably installed inside the sleeve. An external damping spring is provided on the surface of the bottom of the pull rod, located inside the side sealing frame. A slider connected to and limited by the external damping spring is provided at the bottom of the pull rod. Long grooves are opened on the bottom tubes on both sides of the sleeve to cooperate with the slider.

[0012] Furthermore, the pressure cap is provided with an upper cylinder that is connected to the spliced ​​cylinder body in the middle. Side drain ports are symmetrically provided on both sides of the bottom of the upper cylinder. An annular chamber with a cross-sectional shape resembling an M structure is recessed upward at the bottom center of the upper cylinder, and the two sides of the annular chamber are connected to the side drain ports. A liquid guiding cone tip facing the upper cone is provided at the center of the annular chamber. A limiting cavity is provided inside the spliced ​​cylinder body that is connected to the return cone. The limiting cavity maintains a structural design that is narrow at the top, wide at the bottom, and thin in the middle. The pressure cap is mainly used to release internal pressure and increase the boiling point of the coolant when the pressure of the cooling system is too high.

[0013] Furthermore, a side bracket is provided on the outer wall of the upper cone to be connected and fixed to the limiting cavity. A liquid accumulating funnel extending into the interior of the reflux cone is provided in the recess at the top of the upper cone. An internal limiting sleeve located directly below the liquid accumulating funnel is sleeved at the center of the bottom of the reflux cone. Multiple sets of return ports are arranged in a ring outside the internal limiting sleeve inside the reflux cone. The top of the return port is connected to the liquid accumulating funnel, and the bottom of the return port is provided with a hole that penetrates the bottom section of the reflux cone and faces the lower cone.

[0014] Furthermore, the built-in limiting sleeve is internally fitted with a limiting slide rod, the bottom of which is fixedly fitted to the top of the lower cone. The built-in limiting sleeve is internally fitted with a built-in damping spring that is fitted onto the surface of the limiting slide rod. The top of the lower cone is provided with a mating section that is larger than the bottom section of the return cone, and a plug that mates with the hole can be provided on the mating section of the lower cone.

[0015] Furthermore, the bottom of the outer detection cover is provided with a liquid accumulation chamber, the top inner wall of the outer detection cover is provided with an upper partition that is connected to the pressure cover, the middle outer wall of the upper partition is inclined with an inclined guide plate, the top center of the liquid accumulation chamber is provided with a lower partition with an annular structure, and the side pressure relief port forms a multi-fold channel with the upper partition, the inclined guide plate and the lower partition.

[0016] A test method for an engine coolant consumption testing device includes the following steps:

[0017] Step 1: Open the injection port according to the testing requirements and inject a certain amount of coolant into the expansion detection ball until it reaches the upper mark. Then close and tighten the sealing cap of the injection port.

[0018] Step 2: Perform the degassing operation. Start the test engine and run it at low speed for 10 minutes. You can also slightly increase the speed, but the intensity should not be too high. At this time, you can observe the liquid level in the expansion test ball. If there is a significant drop, repeat the injection port filling step.

[0019] Step 3: After completing Step 2, perform the degassing operation again. Check that the engine speed has increased to 2000 rpm until the engine's large circulation loop is open. Observe that a large amount of coolant is coming out of the degassing pipe. Continue for 10 minutes. After the engine has been idled for 5 minutes, the degassing process is over.

[0020] Step 4: Confirm that the gas inside the engine cooling system has been completely removed. After the engine has cooled down, add coolant to the expansion test ball up to the upper mark. The upper mark is set according to the corresponding engine model. Repeat Step 3. After the engine has cooled down, observe whether the coolant level changes. If the level does not drop, it means that the gas removal is complete. If the level drops, add coolant and repeat Step 3 until the level does not drop.

[0021] Step 5: After degassing is completed, the formal test is carried out. Let the running time of the engine at full speed and full load be t, which is generally ≥24h. Let the change of the scale inside the measuring cylinder be V (mm³). Then the average coolant consumption is S=V / tmm³ / h.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention achieves real-time visual monitoring and precise quantitative calculation of engine coolant consumption through the integrated design of expansion detection ball, water replenishment detection ball and intermediate measuring cylinder, combined with multi-stage degassing test process and transparent pipeline connection method. It can quickly identify abnormal coolant consumption to trigger timely maintenance, and provide direct data support for the scientific formulation of coolant maintenance and replenishment cycle.

[0024] 2. This invention significantly reduces the ineffective losses of coolant caused by vaporization and pressure fluctuations during testing by utilizing the pressure relief and stabilization function of the pressure cover, the liquid recovery structure of the return cone, and the loss collection design of the multi-fold return channel. This improves the accuracy of the consumption test, and the test results can directly provide key reference for the capacity optimization design of the upper and lower markings of the engine auxiliary water tank. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the feedback bracket of the present invention;

[0028] Figure 3 This is an internal cross-sectional view of the expansion detection sphere of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the water replenishment detection ball of the present invention;

[0030] Figure 5 This is a three-dimensional structural schematic diagram of the pressure relief tubing of the present invention;

[0031] Figure 6 This is a schematic diagram of the exploded structure of the pressure relief tubing of the present invention;

[0032] Figure 7 This is a schematic diagram of the unfolded splicing cylinder of the present invention;

[0033] Figure 8 This is a schematic diagram of the pressure cap structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the reflux cone structure of the present invention;

[0035] Figure 10 This is a schematic diagram showing the connection between the pressure relief tubing and the outer detection cover of the present invention;

[0036] Figure 11 This is a schematic diagram of the engine operation connection for the present invention.

[0037] Attached reference numerals: 1. Testing machine; 101. Engine mounting bracket; 102. Water tank; 103. Cooling fan; 2. Feedback bracket; 3. Expansion detection ball; 301. Degassing pipe; 302. Liquid inlet; 4. Water replenishment detection ball; 401. Water replenishment pipe; 402. Intermediate measuring cylinder; 5. Outer testing cover; 501. Upper partition; 502. Inclined guide plate; 503. Lower partition; 504. Liquid accumulation chamber; 6. Pressure cover 601. Spliced ​​cylinder body; 602. Side drain port; 603. Liquid guiding cone; 7. Pressure relief tubing; 701. Side sealing frame; 702. Side pressure relief port; 703. Sleeve; 704. Tie rod; 705. External damping spring component; 8. Return cone; 801. Side clamp; 802. Upper cone; 803. Lower cone; 804. Liquid collection funnel; 805. Return port; 806. Internal limiting sleeve; 807. Internal damping spring component. Detailed Implementation

[0038] 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.

[0039] Example 1: Please refer to Figure 1 - Figure 2 As shown, this embodiment is an engine coolant consumption testing device and its testing method. Multiple sets of symmetrical engine mounting brackets 101 are provided on the inner bottom wall of the end of the testing machine 1 away from the feedback bracket 2. A cooling fan 103 located below the feedback bracket 2 is provided at one end of the engine mounting bracket 101. Multiple sets of water tanks 102 are provided on the side of the cooling fan 103. Several sets of heat dissipation holes are provided around the body of the testing machine 1.

[0040] The feedback bracket 2 has a recessed slide rail at one end facing the expansion detection ball 3. Both the expansion detection ball 3 and the water replenishment detection ball 4 have fixing blocks on their outer walls that are connected to the slide rail. The fixing blocks are limited by bolts and the slide rail. The expansion detection ball 3 is mainly used as a buffer space when the engine coolant expands due to heat, and at the same time receives coolant and air bubbles from the degassing port of the engine and water tank 102. The water replenishment detection ball 4 is used to replenish the engine coolant.

[0041] Multiple sets of degassing pipes 301 are provided on the outer wall of the end of the expansion detection ball 3 away from the feedback bracket 2. The multiple sets of degassing pipes 301 are respectively connected to the detection engine retaining pipe sleeve adapted on the water tank 102 and the engine mounting bracket 101. A liquid injection port 302 is provided on the top of one side of the expansion detection ball 3. A removable sealing cap is provided on the top of the liquid injection port 302. A water replenishment detection ball 4 is provided at the bottom of the water replenishment detection ball 4, which is connected to the detection engine and the water tank 102 retaining pipe. An intermediate measuring cylinder 402 is provided on the top of the water replenishment detection ball 4, which is fitted and limited with the expansion detection ball 3. The surface of the intermediate measuring cylinder 402 is provided with scale lines. The intermediate measuring cylinder 402 has a scale line in the middle, which allows for real-time observation of the coolant level.

[0042] The engine to be tested is positioned inside the testing machine 1 by the engine mounting bracket 101. The degassing pipe 301 is connected to the engine's degassing port and the water tank 102's degassing port. The water supply pipe 401 is connected to the water pump configured on the engine through a branch pipe, ensuring that the water supply pipe 401 remains connected to the engine and the water tank 102. The engine to be tested is equipped with a thermostat according to testing requirements, and an engine water outlet pipe connected to the water tank 102 is installed on the thermostat cover. This completes the initial equipment preparation for testing the coolant consumption of the engine. The expansion testing ball 3, the water supply testing ball 4, the degassing pipe 301, and the water supply pipe 401 are all made of transparent plastic. Figure 11 As shown;

[0043] Step 1: Open the injection port 302 according to the testing requirements, inject a certain amount of coolant into the expansion detection ball 3 until it reaches the upper mark, and then close and tighten the sealing cap of the injection port 302.

[0044] Step 2: Perform the degassing operation. Start the test engine and run it at low speed for 10 minutes. You can also slightly increase the speed, but the intensity should not be too high. At this time, you can observe the liquid level in the expansion test ball 3. If there is a significant drop, repeat the injection steps at injection port 302.

[0045] Step 3: After completing Step 2, perform the degassing operation again. Check that the engine speed has increased to 2000 rpm until the engine's large circulation loop is open. Observe that a large amount of coolant is coming out of the degassing pipe. Continue for 10 minutes. After the engine has been idled for 5 minutes, the degassing process is over.

[0046] Step 4: Confirm that the gas inside the engine cooling system has been completely removed. After the engine has cooled down, add coolant to the expansion detection ball 3 up to the upper mark. The upper mark is set according to the corresponding engine model. Repeat Step 3. After the engine has cooled down, observe whether the coolant level changes. If the level does not drop, it means that the gas removal is complete. If the level drops, add coolant and repeat Step 3 until the level does not drop.

[0047] Step 5: After degassing is completed, the formal test is carried out. Let the running time of the engine at full speed and full load be t, which is generally ≥24h. Let the change of the scale inside the measuring cylinder be V (mm³). Then the average coolant consumption is S=V / tmm³ / h.

[0048] In Example 2, a feedback bracket 2 is provided at the top of one end of the testing machine 1. An expansion detection ball 3 and a water replenishment detection ball 4 are provided on the sliding rod of the feedback bracket 2. A pressure relief pipe column 7 is provided at the top of the expansion detection ball 3. A pressure cover 6 is sleeved on the top of the pressure relief pipe column 7. An outer detection cover bucket 5 that cooperates with and connects to the pressure cover 6 is sleeved on the outer periphery of the pressure relief pipe column 7.

[0049] It detects excess gas generated when the engine coolant expands due to heat, and simultaneously receives coolant and air bubbles from the degassing port of the engine and water tank 102. Guided by the degassing pipe 301, the pressure cap 6 works in conjunction with the expansion detection ball 3 to release internal pressure and raise the boiling point of the coolant when the cooling system pressure is too high.

[0050] During the release of internal pressure, the gas flows along the inside of the pressure relief column 7 and pushes the splicing cylinder 601 of the pressure cover 6. The pressurized gas flows along the inside of the limiting cavity and fills it, causing the splicing cylinder 601 to be pushed by the pressure and drive the entire pressure cover 6 to move upward, causing the side outlet 602 to slide upward and maintain connection with the side pressure relief port 702, so as to release the excess pressurized gas inside the expansion detection ball 3.

[0051] The bottom of the pressure relief string 7 is sealed to the center of the top of the expansion detection ball 3. The top of the pressure relief string 7 is provided with an annular platform that works in conjunction with the pressure cover 6. The top of the pressure relief string 7 is symmetrically provided with side pressure relief ports 702 located below the annular platform on both sides. Side sealing frames 701 are symmetrically provided on the outer walls at both ends of the pressure relief string 7.

[0052] The side sealing frame 701 has an internally vertically mounted sleeve 703 that is fitted and limited to the annular platform. A pull rod 704 is slidably mounted inside the sleeve 703. An external damping spring 705 located inside the side sealing frame 701 is mounted on the bottom surface of the pull rod 704. A slider connected to and limited by the external damping spring 705 is mounted at the bottom of the pull rod 704. Long grooves are provided on the bottom tubes on both sides of the sleeve 703 to cooperate with and connect to the slider.

[0053] During the upward sliding of the pressure cap 6, the side sealing bracket 701 of the pressure relief column 7 is passively activated. The top of the pull rod 704 is sleeved with both ends of the pressure cap 6. As the pressure cap 6 slides upward, it drives the pull rod 704 to slide upward synchronously. The pull rod 704 slides along the inside of the sleeve 703, causing the pull rod 704 to drive the slider to slide along the inside of the long groove of the sleeve 703, and compress the external damping spring 705 until the side outlet 602 of the pressure cap 6 is connected to the side pressure relief port 702, guiding the internal pressure gas to leak out. After the pressure gas is released, the external damping spring 705 resets and drives the pressure cap 6 to be reinserted into the pressure relief column 7, further sealing and protecting the expansion detection ball 3.

[0054] In embodiment 3, the bottom of the pressure cover 6 is provided with a splicing cylinder 601 that is slidably sleeved with the inside of the pressure relief pipe 7. The inside of the splicing cylinder 601 is provided with a return cone 8 that is connected to the inner cavity of the expansion detection ball 3. The top of the return cone 8 is provided with an upper cone 802 that extends into the inside of the splicing cylinder 601 and is fixed. The bottom center of the return cone 8 is slidably sleeved with a lower cone 803.

[0055] The pressure cover 6 has an upper cylinder that connects to the splicing cylinder 601 in the middle. Side drain ports 602 are symmetrically arranged on both sides of the bottom of the upper cylinder. An annular chamber with an M-shaped cross-section is recessed at the bottom center of the upper cylinder, and the two sides of the annular chamber are connected to the side drain ports 602. A liquid guiding cone tip 603 facing the upper cone 802 is arranged at the center of the annular chamber. The splicing cylinder 601 has a limiting cavity that connects to the return cone 8. The limiting cavity has a structure design that is narrow at the top, wide at the bottom, and narrow in the middle. The pressure cover 6 is mainly used to release internal pressure and increase the boiling point of the coolant when the pressure of the cooling system is too high.

[0056] When there is excess pressurized gas inside the expansion detection ball 3, the pressurized gas first contacts the lower cone, causing the lower cone to slide upwards under pressure. The limiting slide rod slides upwards and retracts into the built-in limiting sleeve 806. The lower cone slides upwards and connects with the bottom section of the return cone 8, sealing the hole. During the pressure relief process of the pressure cover 6 sliding upwards, the pressurized gas carries some vaporized liquid and flows along the limiting cavity. Due to the tortuous structure inside the limiting cavity and the structure of the liquid guiding cone, it helps to complete the retention and accumulation of some vaporized liquid in the pressure chamber. After the pressure relief is completed and the pressure cover 6 returns to its original position, the built-in damping spring 807 loses external pressure and pushes the lower cone and the return cone 8 to disconnect. The liquid accumulated inside the liquid accumulating funnel 804 flows under its own weight and the influence of the structure of the liquid accumulating funnel 804, and flows back into the expansion detection ball 3 along the hole. This effectively reduces the abnormal coolant loss caused by the stable operation of the detection engine on the detection machine 1 and the resulting internal pressure fluctuations, realizing the primary internal return dynamic process.

[0057] The upper cone 802 has a side bracket 801 on its outer wall that is connected and fixed to the limiting cavity. The top of the upper cone 802 has a recessed liquid accumulating funnel 804 that extends into the interior of the reflux cone 8. The bottom center of the reflux cone 8 is fitted with an internal limiting sleeve 806 located directly below the liquid accumulating funnel 804. The reflux cone 8 has multiple sets of return ports 805 arranged in a ring outside the internal limiting sleeve 806. The top of the return port 805 is connected to the liquid accumulating funnel 804, and the bottom of the return port 805 has a hole that penetrates the bottom section of the reflux cone 8 and faces the lower cone 803.

[0058] The built-in limiting sleeve 806 has a sliding sleeve with a limiting slide rod inside. The bottom of the limiting slide rod is fixedly sleeved with the top of the lower cone 803. The built-in limiting sleeve 806 has a built-in damping spring 807 sleeved on the surface of the limiting slide rod. The top of the lower cone 803 has a mating section larger than the bottom section of the return cone 8, and a plug can be provided on the mating section of the lower cone 803 to connect with the hole.

[0059] The bottom of the outer test cover 5 is provided with a liquid accumulation chamber 504. The upper partition 501, which is connected to the pressure cover 6, is provided on the inner wall of the top of the outer test cover 5. An inclined guide plate 502 is inclinedly provided on the outer wall of the middle part of the upper partition 501. A lower partition 503 with an annular structure is provided at the center of the top of the liquid accumulation chamber 504. The side pressure relief port 702 forms a multi-fold channel with the upper partition 501, the inclined guide plate 502 and the lower partition 503.

[0060] During the release of pressurized gas along the side pressure relief port 702, the location of the side pressure relief port 702, combined with the obstruction effect of the upper baffle 501, causes the released pressurized gas to flow downwards along the cavity between the pressure relief pipe 7 and the upper baffle 501, further flowing along the gap between the upper baffle 501 and the top cavity of the liquid accumulation chamber 504, then flowing along the gap between the upper baffle 501 and the lower baffle 503, and finally flowing along the gap between the lower baffle 503 and the inclined guide plate 502 to the outermost side of the outer detection barrel cover. Several micropores are provided on the inclined surface of the top of the outer detection barrel cover. The pressure relief gas is released and flows outward. It should be noted that the liquid-absorbing filler inside the multi-fold return channel can filter and retain some of the filtered liquid. The top cavity of the liquid accumulation chamber 504 is provided with several fine holes to guide the filtered and settled liquid and the squeezed liquid retained on the inner wall of the outer detection barrel cover. This realizes the collection of coolant loss generated during the pressure release process in multiple ways, so as to make a ratio between the coolant loss rate during engine operation and the amount of coolant collected in multiple ways, thereby verifying whether the coolant loss during engine operation is normal.

[0061] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0062] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An engine coolant consumption testing device, comprising a testing machine (1), characterized in that, The top of one end of the testing machine (1) is provided with a feedback bracket (2), and the sliding rod on the feedback bracket (2) is provided with an expansion detection ball (3) and a water replenishment detection ball (4). The top of the expansion detection ball (3) is provided with a pressure relief pipe column (7), and the top of the pressure relief pipe column (7) is fitted with a pressure cover (6). The outer periphery of the pressure relief pipe column (7) is fitted with an outer detection cover bucket (5) that is connected to the pressure cover (6). The pressure cap (6) is provided with a splicing cylinder (601) that is slidably sleeved inside the pressure relief pipe (7) at the bottom. The splicing cylinder (601) is provided with a return cone (8) that is connected to the inner cavity of the expansion detection ball (3) in a coordinated manner. The return cone (8) is provided with an upper cone (802) that extends into the splicing cylinder (601) and is fixedly positioned therein. The return cone (8) is provided with a lower cone (803) that is slidably sleeved at the center of the bottom.

2. The engine coolant consumption testing device according to claim 1, characterized in that, On the inner bottom wall of the end of the testing machine (1) away from the feedback bracket (2), there are multiple sets of symmetrical engine mounting brackets (101). One end of the engine mounting bracket (101) is provided with a cooling fan (103) located below the feedback bracket (2). Multiple sets of water tanks (102) are provided on the side of the cooling fan (103). Several sets of heat dissipation holes are provided around the body of the testing machine (1).

3. The engine coolant consumption testing device according to claim 1, characterized in that, The feedback bracket (2) has a recessed slide rail at one end facing the expansion detection ball (3). Both the expansion detection ball (3) and the water replenishment detection ball (4) have fixing blocks on their outer walls that are connected to the slide rail. The fixing blocks are limited to the slide rail by bolts.

4. The engine coolant consumption testing device according to claim 2, characterized in that, Multiple sets of degassing pipe fittings (301) are provided on the outer wall of the end of the expansion detection ball (3) away from the feedback bracket (2). The multiple sets of degassing pipe fittings (301) are respectively connected to the detection engine retaining pipe sleeve adapted on the water tank (102) and the engine mounting bracket (101). A liquid injection port (302) is provided on the top of one side of the expansion detection ball (3). A detachable sealing cap is provided on the top of the liquid injection port (302). A water replenishment detection ball (4) is provided at the bottom of the water replenishment detection ball (4) and is connected to the detection engine and the water tank (102). An intermediate measuring cylinder (402) is provided on the top of the water replenishment detection ball (4) and is fitted and limited with the expansion detection ball (3). The surface of the intermediate measuring cylinder (402) is provided with scale lines.

5. The engine coolant consumption testing device according to claim 1, characterized in that, The bottom of the pressure relief column (7) is sealed and sleeved with the top center of the expansion detection ball (3). The top of the pressure relief column (7) is provided with an annular platform that works in conjunction with the pressure cover (6). The top two sides of the pressure relief column (7) are symmetrically provided with side pressure relief ports (702) located below the annular platform. The outer walls of both ends of the pressure relief column (7) are symmetrically provided with side sealing frames (701). The side sealing frame (701) is provided with a sleeve (703) that is vertically installed inside and sleeved and limited to the annular platform. The sleeve (703) is slidably provided with a pull rod (704) inside. The bottom surface of the pull rod (704) is provided with an external damping spring (705) located inside the side sealing frame (701). The bottom of the pull rod (704) is provided with a slider that is connected and limited to the external damping spring (705). The bottom tubes on both sides of the sleeve (703) are provided with long grooves that are connected to the slider.

6. The engine coolant consumption testing device according to claim 1, characterized in that, The pressure cap (6) is provided with an upper cylinder that is connected to the splicing cylinder (601) in the middle. Side outlets (602) are symmetrically provided on the bottom of both sides of the upper cylinder. An annular chamber with a cross-section resembling an M structure is recessed at the bottom center of the upper cylinder. The two sides of the annular chamber are connected to the side outlets (602). A liquid guiding cone tip (603) facing the upper cone (802) is provided at the center of the annular chamber. A limiting cavity that is connected to the reflux cone (8) is provided inside the splicing cylinder (601).

7. The engine coolant consumption testing device according to claim 6, characterized in that, The upper cone (802) is provided with a side bracket (801) that is fixedly connected to the limiting cavity on the outer wall. The top of the upper cone (802) is recessed and provided with a liquid accumulating funnel (804) extending into the interior of the reflux cone (8). The bottom center of the reflux cone (8) is fitted with an internal limiting sleeve (806) located directly below the liquid accumulating funnel (804). The interior of the reflux cone (8) is provided with multiple sets of return ports (805) arranged in a ring outside the internal limiting sleeve (806). The top of the return port (805) is connected to the liquid accumulating funnel (804), and the bottom of the return port (805) is provided with a hole that penetrates the bottom section of the reflux cone (8) and faces the lower cone (803).

8. The engine coolant consumption testing device according to claim 7, characterized in that, The built-in limiting sleeve (806) is internally fitted with a limiting slide rod, the bottom of the limiting slide rod is fixedly fitted with the top of the lower cone (803), the built-in limiting sleeve (806) is internally fitted with a built-in damping spring (807) fitted on the surface of the limiting slide rod, and the top of the lower cone (803) is provided with a matching cross section larger than the bottom cross section of the return cone (8).

9. The engine coolant consumption testing device according to claim 1, characterized in that, The bottom of the outer detection cover (5) is provided with a liquid accumulation chamber (504). The upper partition (501) is provided on the inner wall of the top of the outer detection cover (5) and is connected to the pressure cover (6). An inclined guide plate (502) is inclinedly provided on the outer wall of the middle part of the upper partition (501). A lower partition (503) with an annular structure is provided at the center of the top of the liquid accumulation chamber (504). The side pressure relief port (702) forms a multi-fold channel with the upper partition (501), the inclined guide plate (502) and the lower partition (503).

10. A test method for an engine coolant consumption testing device, used in any one of claims 1-9, characterized in that, The following methods and steps are included: Step 1: Open the injection port (302) according to the testing requirements, inject a certain amount of coolant into the expansion detection ball (3), and add it until the upper mark is reached. Then close and lock the sealing cap of the injection port (302). Step 2, perform degassing operation, start the test engine, run at low speed for 10 minutes, you can also slightly increase the speed but the intensity should not be too high, at this time you can observe the liquid level in the expansion test ball (3), if there is a significant drop, repeat the injection steps at the injection port (302); Step 3: After completing Step 2, perform the degassing operation again. Check that the engine speed has increased to 2000 rpm until the engine's large circulation loop is open. Observe that a large amount of coolant is coming out of the degassing pipe. Continue for 10 minutes. After the engine has been idled for 5 minutes, the degassing process is over. Step 4: Confirm whether the gas inside the engine cooling system has been completely removed. After the engine has cooled down, add coolant to the expansion detection ball (3) up to the upper mark. The upper mark is set according to the corresponding engine model. Repeat Step 3. After the engine has cooled down, observe whether the coolant level has changed. If the level has not dropped, it means that the degassing is complete. If the level has dropped, add coolant and repeat Step 3 until the level has not dropped. Step 5: After degassing is completed, the formal test is carried out. Let the running time of the engine at full speed and full load be t, which is generally ≥24h. Let the change of the scale inside the measuring cylinder be V (mm³). Then the average coolant consumption is S=V / tmm³ / h.

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