A cylinder liner system suitable for optical engine temperature control and lubrication

Abstract

The present invention discloses a cylinder liner system suitable for temperature control and lubrication of an optical engine, comprising a temperature-controlled cylinder liner system, a lubricating cylinder liner system, a visual piston system, and an electronic control system. The temperature-controlled cylinder liner system comprises a temperature-controlled cylinder liner body and a temperature-controlled water tank; the temperature-controlled cylinder liner body is composed of two sleeves nested in each other, and the space between the two sleeves is an embedded cooling water channel. The relative movement between the embedded cooling water channel, the temperature-controlled water tank, and the cylinder liner is used to control the cylinder liner temperature, ensuring a more uniform temperature distribution of the cylinder liner. At the same time, the cylinder liner temperature can be controlled at a constant temperature and a variable temperature; and the piston is controlled to perform a circumferential spray of lubricating oil between the cylinder liner and the piston after every two reciprocating motions, thereby solving the cylinder pulling failure that is prone to occur in optical engines. The amount of lubricating oil sprayed is proportional to the cylinder liner cooling water temperature. When the lubricating cylinder liner system provides more lubricating oil, it can be temporarily stored in the visual piston. When the lubricating cylinder liner system provides less lubricating oil, the visual piston can be replenished with lubricating oil.

Description

Technical Field

[0001] The present invention relates to an optical combustion diagnosis system for an internal combustion engine, and in particular to a cylinder liner system suitable for optical engine temperature control and lubrication. Background Art

[0002] An optical engine is an engine testing device that incorporates optical windows in the cylinder liner or piston, allowing the acquisition of optical signals via a high-speed camera. A typical configuration consists of a fully transparent, partially transparent, or opaque cylinder liner, a piston topped with transparent quartz glass, an extended Bowditch-style hollowed-out piston with a reflector mounted in the hollowed-out section, and a high-speed camera to collect in-cylinder optical signals. Optical engines primarily investigate in-cylinder spray, mixture formation, combustion flame structure, and pollutant generation and evolution. Because they obtain real-world information without disrupting the in-cylinder operating process, optical engines have found widespread application.

[0003] The optical engine cylinder head and crankcase are connected by a column. The column fits tightly with the cylinder liner, and there is no extra space to install other equipment. This leads to some problems with the optical engine. (1) The cylinder liner of the optical engine is generally air-cooled or partially water-cooled. The air cooling method has a poor cooling effect and it is difficult to maintain the cylinder liner at a constant temperature; the partial water cooling method causes a large temperature gradient in the cylinder liner, which can easily have an adverse effect on the experimental results. (2) The Bowditch piston between the cylinder head and the crankcase is exposed to the air, and there is no lubricating oil between the cylinder liner and the piston ring. Over time, the cylinder liner and the piston ring will wear out severely, which can easily cause cylinder scuffing failure. (3) Because the lubrication effect between the cylinder liner and the piston of the optical engine is quite different from that of the thermodynamic engine, the experimental results of the optical engine are different from the actual results of the thermodynamic engine. (4) In order to reduce the wear between the cylinder liner and the piston ring, the cylinder liner needs to be disassembled and assembled regularly for manual grease application. However, the amount of grease applied manually is difficult to control, which can easily cause uneven grease application thickness. In addition, multiple grease applications require frequent disassembly of the cylinder head and cylinder liner, which is a cumbersome and complicated procedure. Summary of the Invention

[0004] In response to the above-mentioned existing technologies, the present invention provides a cylinder liner system suitable for temperature control and lubrication of optical engines, which can realize constant temperature and variable temperature control, improve the uniformity of cylinder liner temperature distribution, and independently and controllably provide lubricating oil to ensure a more uniform distribution of lubricating oil between the cylinder liner and the piston ring, avoid cylinder scuffing failures, and reduce the difference between the experimental values ​​of the optical engine and the actual values ​​of the thermodynamic engine.

[0005] In order to solve the above technical problems, the present invention proposes a cylinder liner system suitable for optical engine temperature control and lubrication, which includes a temperature control cylinder liner system, a lubrication cylinder liner system, a visualization piston system and an electronic control system;

[0006] The temperature control cylinder liner system includes a temperature control cylinder liner body, a temperature control water tank and two power motors; the temperature control cylinder liner body is composed of two mutually nested sleeves, and the space between the two sleeves is divided into ten water tanks of the same size by a plurality of connecting ribs arranged along the circumference. The ten water tanks are divided into two groups according to the five adjacent water tanks in the circumference being connected in series. The positions of the series ports of adjacent water tanks in the same group are arranged in an upper and lower staggered manner. Each group of water tanks has a water inlet and a water outlet, and the water inlet and the water outlet are both The outer wall of the temperature-controlled cylinder liner body is penetrated and connected to a temperature-controlled water tank via a water pipe; a high-pressure water pump is installed in the temperature-controlled water tank; the high-pressure water pump presses temperature-controlled medium water from two water inlets into two sets of water tanks between the two sleeves. The temperature-controlled medium water flows through the two sets of water tanks to transfer heat to or absorb heat from the lubricating cylinder liner system, and then flows back to the temperature-controlled water tank from the water outlet; the two power motors are symmetrically installed below the temperature-controlled cylinder liner body, and the power motors drive the temperature-controlled cylinder liner body to rotate through a gear transmission mechanism;

[0007] The lubricating cylinder liner system includes a lubricating cylinder liner body, two lubricating oil injectors, and a lubricating oil pump; the lubricating oil injectors and the lubricating oil pump are connected by an oil pipe; an annular oil groove is provided in the lower part of the lubricating cylinder liner body, and 20 oil injection holes leading to the interior of the lubricating cylinder liner body are evenly distributed along the circumference of the annular oil groove, and the injection direction of the oil injection holes is inclined with respect to the radial direction of the lubricating cylinder liner body; the two lubricating oil injectors are respectively connected to the annular oil groove through lubricating oil pipelines;

[0008] The temperature control cylinder liner body is sleeved on the upper part of the lubricating cylinder liner body with a clearance fit; the power motor drives the temperature control cylinder liner body to reciprocate around the lubricating cylinder liner body through a gear transmission mechanism; the outer diameter of the lower part of the lubricating cylinder liner body is the same as the outer diameter of the temperature control cylinder liner body;

[0009] The visualization piston system includes a visualization piston body and a quartz glass window. Two air rings and a slotted oil ring are provided on the upper portion of the visualization piston body from top to bottom. An annular oil storage groove is provided on the visualization piston body and inside the slotted oil ring. The slotted oil ring has a connecting hole that penetrates the annular oil storage groove.

[0010] The lubricating oil is pressurized by the lubricating oil pump and then pumped into the lubricating oil injector and then into the annular oil groove, and then sprayed between the lubricating cylinder liner body and the slotted oil ring through the oil spray hole;

[0011] The electronic control system includes a water temperature sensor of the temperature-controlled water tank, an engine speed sensor and an ECU unit. The water temperature sensor, engine speed sensor, power motor, high-pressure water pump, lubricating oil pump and lubricating oil injector are all connected to the ECU unit.

[0012] Furthermore, the cylinder liner system for optical engine temperature control and lubrication according to the present invention comprises:

[0013] The water inlet is located at the top end of the temperature control cylinder sleeve body, and the water outlet is located at the bottom end of the temperature control cylinder sleeve body.

[0014] The gear transmission mechanism includes an annular outer gear ring fixed to the bottom of the temperature control cylinder sleeve body, and the output end of the power motor is provided with a gear meshing with the annular outer gear ring.

[0015] The forks of the two air rings and the one slotted oil ring are arranged alternately.

[0016] The quartz glass window is arranged on the visualization piston body at one end of the piston head.

[0017] The ECU unit determines the difference between the actual water temperature and the target water temperature based on the water temperature monitored in real time by the water temperature sensor, and controls the temperature-controlled water tank to heat or cool the cooling medium water; the ECU unit calculates the viscosity of the lubricating oil based on the water temperature information provided by the temperature-controlled water tank water temperature sensor, and then controls the lubricating oil pump and the lubricating oil injector to adjust the injection amount of the lubricating oil; the ECU unit controls the injection frequency of the lubricating oil injector based on the speed information provided by the engine speed sensor, and performs a circumferential injection of lubricating oil between the cylinder liner and the piston after every two reciprocating motions of the piston; the ECU unit also controls the power motor to rotate forward and reverse at a fixed frequency.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) In the present invention, the temperature-controlled cylinder liner system is connected to a high-power temperature-controlled water tank. The temperature-controlled medium water can effectively absorb or transfer heat to the lubricating cylinder liner body, and precisely control the temperature of the inner wall of the lubricating cylinder liner with an error range of ±0.5°C, thereby eliminating the influence of temperature fluctuations on the experimental results in the same group of experiments.

[0020] (2) The relative movement between the temperature-controlled cylinder liner body and the lubricating cylinder liner body, the multiple temperature-controlled water tanks, the "N"-shaped water tank flow direction, and the high-speed water flow provided by the high-pressure water pump can achieve a more uniform temperature distribution on the inner wall of the lubricating cylinder liner body, eliminating the influence of uneven temperature on the inner wall of the cylinder liner on the experimental results.

[0021] (3) In the present invention, the lubricating oil injector, multiple inclined oil injection holes, slotted oil ring and piston oil storage tank designed in the lubricating cylinder liner system can effectively simulate the lubricating oil arrangement between the cylinder liner and the piston of a thermodynamic engine, ensuring that the operating conditions of the optical engine are closer to those of a thermodynamic engine, thereby improving the credibility of the experimental results.

[0022] (4) The lubricating cylinder liner system reduces the wear between the cylinder liner and the piston ring, prolongs the service life of the cylinder liner and the piston ring, improves the air tightness of the combustion chamber, and avoids cylinder scuffing.

[0023] (5) The cylinder liner lubrication system replaces the manual grease application operation, making the lubricant application more uniform and the lubricant amount more appropriate, reducing the number of times the cylinder head and cylinder liner are disassembled and assembled, and simplifying the experimental procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the cylinder liner system of the present invention;

[0025] Figure 2 yes Figure 1 A cross-sectional view of the temperature control cylinder liner system shown in FIG;

[0026] Figure 3 yes Figure 2 The AA cross-sectional diagram of the temperature control cylinder liner system is shown;

[0027] Figure 4 yes Figure 2 The cross-sectional diagram of the temperature control cylinder liner system BB is shown;

[0028] Figure 5 yes Figure 2 Schematic diagram of the cross section of the temperature control cylinder liner body along the circumferential direction shown in FIG;

[0029] Figure 6 yes Figure 1 A cross-sectional view of the lubricating cylinder liner system shown in;

[0030] Figure 7 yes Figure 6 The CC cross-sectional diagram of the lubricating cylinder liner system is shown;

[0031] Figure 8 yes Figure 6 The DD cross-sectional diagram of the lubricating cylinder liner system is shown;

[0032] Figure 9 yes Figure 1 A partial structural cross-sectional view of a visual piston system is shown in FIG;

[0033] Figure 10 yes Figure 9 An enlarged view of the local structure of part I of the visual piston body is shown in the figure.

[0034] In the picture:

[0035] 1- Temperature control cylinder liner body 2- Lubrication cylinder liner body 3- Visualized piston body 4- Water inlet

[0036] 5-water tank 6-water outlet 7-annular outer gear 8-power motor

[0037] 9-Connecting rib 10-Annular oil groove 11-Oil injection hole 12-Lubricating oil pipeline

[0038] 13-Lubricating oil injector 14-Gas ring 15-Slotted oil ring 16-Connecting hole

[0039] 17-annular oil storage tank 18-quartz glass window 19-water pipe 20-temperature controlled water tank

[0040] 21-Oil pipe 22-Lubricating oil pump 23-ECU unit DETAILED DESCRIPTION

[0041] The present invention provides a cylinder liner system suitable for temperature control and lubrication of an optical engine. The design concept is as follows: the cylinder liner system includes a temperature-controlled cylinder liner system, a lubricating cylinder liner system, a visual piston system, and an electronic control system. The temperature-controlled cylinder liner system includes a temperature-controlled cylinder liner body and a temperature-controlled water tank. The temperature-controlled cylinder liner body is composed of two nested sleeves. The space between the two sleeves is an embedded cooling water channel. The relative movement between the embedded cooling water channel, the high-power temperature-controlled water tank, and the cylinder liner is used to control the cylinder liner temperature, ensuring a more uniform cylinder liner temperature distribution. The cylinder liner temperature can also be controlled at constant and variable temperatures. At the same time, the present invention controls the lubricating oil spraying of the cylinder liner through an ECU unit, which controls the motor connected to the piston and its related sensors. After every two reciprocating motions of the piston, lubricating oil is sprayed circumferentially between the cylinder liner and the piston. This solves the cylinder scuffing problem that is common in optical engines and matches the lubrication environment between the cylinder liner and piston of a thermodynamic engine. In addition, there's a correlation between the cylinder liner cooling water temperature and the amount of lubricating oil. Because lubricating oil's viscosity decreases as its temperature rises, higher cylinder liner cooling water temperatures result in a higher amount of lubricating oil sprayed in, while lower cylinder liner cooling water temperatures result in a lower amount of lubricating oil sprayed in. The lubricating cylinder liner also has a connection to the visual piston. When the lubricating cylinder liner system provides a high amount of lubricating oil, it can be temporarily stored in the visual piston. When the lubricating cylinder liner system provides a low amount of lubricating oil, the visual piston can replenish the lubricating oil.

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0043] The present invention proposes a cylinder liner system suitable for optical engine temperature control and lubrication, which includes a temperature control cylinder liner system, a lubrication cylinder liner system, a visualization piston system and an electronic control system.

[0044] The specific structure of each part and their relationship are as follows:

[0045] Figure 1This is a schematic diagram of the temperature-controlled and lubricated cylinder liner assembly of the present invention. The lubricating liner system is sheathed on the outside of the visual piston system, and the temperature-controlled liner system is sheathed on top of the lubricating liner system, with the three working closely together. The electronic control system is responsible for controlling the water temperature and the spraying of lubricating oil.

[0046] Figure 2 A cross-sectional view of the temperature control cylinder liner system of the present invention is shown; Figure 3 and Figure 4 Shown respectively Figure 2 Schematic diagram of the cross section of the temperature control cylinder liner system AA and BB shown; Figure 5The figure shows a schematic diagram of a circumferentially expanded cross-section of the temperature-controlled cylinder liner body; the temperature-controlled cylinder liner system includes a temperature-controlled cylinder liner body 1, a water trough 5, a temperature-controlled water tank 20, and two power motors 8. The temperature-controlled cylinder liner body 1 is composed of two nested sleeves. The space between the two sleeves is divided into ten water troughs 5 of equal size by a plurality of connecting ribs 9 arranged evenly along the circumference. The ten water troughs 5 are divided into two groups, with five adjacent water troughs connected in series in the circumferential direction. The positions of the serial ports of adjacent water troughs 5 in the same group are staggered with upper and lower intervals. In the present invention, the connecting ribs 9 are arranged with alternating notches. In addition to connecting the inner and outer sleeves of the temperature-controlled cylinder liner body 1, they also change the flow direction of the temperature-controlled medium in the water troughs 5 and reduce the temperature gradient on the wall of the temperature-controlled cylinder liner body 1. Each group of water tanks has a water inlet 4 and a water outlet 6. The arrangement of the water tanks 5 can effectively realize the heat transfer and heat absorption of the temperature control medium to the temperature control cylinder liner body 1. The water inlet 4 is located at the top of the temperature control cylinder liner body 1, and the cooling medium water flows into the water tank 5 from the water inlet 4. The water outlet 6 is located at the bottom of the temperature control cylinder liner body 1; the water inlet 4 and the water outlet 6 are all through the outer wall of the temperature control cylinder liner body 1 and are connected to the temperature control water tank 20 through the water pipe 19; a high-pressure water pump is provided in the temperature control water tank 20; the high-pressure water pump transfers the temperature control medium to the temperature control cylinder liner body 1; Quality water is pressed into the two sets of water grooves between the two sleeves from the two water inlets 4, and the temperature-controlled medium water flows through the two sets of water grooves to transfer heat or absorb heat to the lubricating cylinder liner system, and then flows back to the temperature-controlled water tank 20 from the water outlet 6; the two power motors 8 are symmetrically installed below the temperature-controlled cylinder liner body 1, and the power motors 8 drive the temperature-controlled cylinder liner body 1 to rotate through a gear transmission mechanism; the gear transmission mechanism includes an annular outer gear ring 7 fixed to the bottom of the temperature-controlled cylinder liner body 1, and the output end of the power motor 8 is provided with a gear meshing with the annular outer gear ring 7. The temperature-controlled cylinder liner body 1 is fitted over the lubricating cylinder liner body 2 with a clearance fit. A power motor 8 drives the temperature-controlled cylinder liner body 1 in reciprocating circumferential rotation around the lubricating cylinder liner body 2 via a gear transmission mechanism. The outer diameter of the lower portion of the lubricating cylinder liner body 2 is the same as that of the temperature-controlled cylinder liner body 1. The power motor 8 rotates forward and reverse at a fixed frequency, driving the temperature-controlled cylinder liner body 1 in a small reciprocating circumferential rotation around the lubricating cylinder liner body 2. This ensures that the temperature-controlled cylinder liner body 1 effectively absorbs and transfers heat to and from the lubricating cylinder liner body 2, and maintains a uniform temperature on the inner wall of the lubricating cylinder liner body 2. Two water inlets 4 and two water outlets 6 are located at the bottom and top of the temperature-controlled cylinder liner body 1, respectively. The temperature-controlled cylinder liner body 1 contains ten water troughs 5 of equal size, arranged in two groups of five, with each group containing five water troughs 5 arranged in an N-shaped circumferential pattern and interconnected. Cooling water flows in through the water inlet 4, absorbs or transfers heat through the water troughs 5, and then flows out through the water outlet 6.

[0047] Figure 6 is a cross-sectional view of the lubricating cylinder liner system of the present invention, Figure 7 and Figure 8 They are Figure 6 The CC and DD cross-sectional schematic diagrams of the lubricating cylinder liner system are shown in FIG. The lubricating cylinder liner system includes a lubricating cylinder liner body 2, two lubricating oil injectors 13, and a lubricating oil pump 22. The two lubricating oil injectors 13 are located on both sides of the bottom of the lubricating cylinder liner body 2 and are responsible for providing lubricating oil. The lubricating oil injectors 13 and the lubricating oil pump 22 are connected by an oil pipe 21. An annular oil groove 10 is provided in the lower part of the lubricating cylinder liner body 2. The annular oil groove 10 has 20 oil injection holes 11 distributed uniformly along the circumference of the annular oil groove 17, leading to the interior of the lubricating cylinder liner body 2. Lubricating oil from the annular oil groove 10 is injected into the space between the cylinder liner and the piston through the oil injection holes 11. In the present invention, the injection direction of the oil injection holes 11 is inclined with respect to the radial direction of the lubricating cylinder liner body 2. This design can achieve a large lubricating oil injection area with a small number of oil injection holes 11. Furthermore, the oil injection hole 11 is flared, and the aperture at the junction of the oil injection hole 11 and the annular oil groove 10 is extremely small. This design ensures a low pressure gradient within the annular oil groove 10, achieving a constant pressure supply of lubricating oil and ensuring that the oil injection volume from each oil injection hole 11 is essentially the same. The two lubricating oil injectors 13 are each connected to the annular oil groove 10 via a lubricating oil pipeline 12. The lubricating oil pipeline 12 is axially arranged at the center of the lubricating cylinder liner body 2 and is responsible for transporting the lubricating oil provided by the lubricating oil injectors 13 to the annular oil groove 10. The lubricating oil is transported through the axial lubricating oil pipelines 12 on both sides of the annular oil groove 10. The lubricating cylinder liner body 2 and the lubricating oil injectors 13 are sealed by a rubber ring on the head of the lubricating oil injectors 13.

[0048] Figure 9 A partial structural cross-sectional view of the visual piston system of the present invention is shown. Figure 10 Shown Figure 9An enlarged view of the local structure of part I in the figure. The visual piston system in the present invention includes a visual piston body 3 and a quartz glass window 18. The upper part of the outer portion of the visual piston body 3 is provided with two air rings 14 and a slotted oil ring 15 from top to bottom, and the forks of the two air rings 14 and the slotted oil ring 15 are arranged alternately. An annular oil storage groove 17 is provided on the visual piston body 3 and located on the inner side of the slotted oil ring 15. The slotted oil ring 15 is provided with a connecting hole 16 that passes through the annular oil storage groove 17; the lubricating oil is pressurized by the lubricating oil pump 22 and pumped into the lubricating oil injector 13, and then enters the annular oil groove 10, and then is sprayed between the lubricating cylinder liner body 2 and the slotted oil ring 15 through the oil injection hole 11; the quartz glass window 18 is arranged on the visual piston body 3 at one end of the piston head. When the lubricating oil supply is large, the lubricating oil between the cylinder liner and the piston enters the annular oil storage groove 17 for temporary storage through the slotted hole on the slotted oil ring 15 and the oil ring connecting hole 16. When the lubricating oil supply is small, the lubricating oil in the annular oil storage groove 17 enters the space between the cylinder liner and the piston through the oil ring connecting hole 16 and the slotted hole on the slotted oil ring 15 for lubrication. This design can automatically and effectively store and supply the lubricating oil between the cylinder liners.

[0049] The electronic control system includes a water temperature sensor for a temperature-controlled water tank, an engine speed sensor, and an ECU unit. The water temperature sensor, engine speed sensor, power motor 8, high-pressure water pump, lubricating oil pump 22, and lubricating oil injector 13 are all connected to the ECU unit. The control functions of the ECU unit include: determining the difference between the actual water temperature and the target water temperature based on the water temperature monitored in real time by the water temperature sensor, controlling the temperature-controlled water tank 20 to heat or cool the cooling medium water; calculating the lubricating oil viscosity based on the water temperature information provided by the temperature-controlled water tank water temperature sensor, and then controlling the lubricating oil pump 22 and lubricating oil injector 13 to adjust the lubricating oil injection amount; controlling the injection frequency of the lubricating oil injector 13 based on the speed information provided by the engine speed sensor, and performing a circumferential injection of lubricating oil between the cylinder liner and the piston after every two reciprocating motions of the piston; and controlling the power motor to rotate forward and reverse at a fixed frequency.

[0050] The specific operation process of the cylinder liner system of the present invention applicable to optical engine temperature control and lubrication is as follows:

[0051] Step 1: Assemble the cylinder liner system: Insert the lubricating cylinder liner body 2 into the visual piston body 3. Insert the lubricating oil injector 13 into the lubricating oil injector mounting hole on the lubricating cylinder liner body 2. Connect one end of the oil pipe 21 to the lubricating oil injector 13 and the other end to the lubricating oil pump 22. Bolt the power motor 8 to the engine block, then insert the temperature-controlled cylinder liner body 1 into the lubricating cylinder liner body 2. Make sure the annular gear 7 on the bottom of the temperature-controlled cylinder liner body 1 aligns with the gear on the power motor 8. Connect one end of the water pipe 19 to the water inlet 4 and outlet 6 of the temperature-controlled cylinder liner body 1, and the other end to the water inlet and outlet of the temperature-controlled water tank 20.

[0052] Step 2: Start the system. The temperature-controlled water tank 20 heats or cools the temperature-controlled medium water to the desired experimental temperature. The high-pressure water pump in the temperature-controlled water tank 20 then pumps the temperature-controlled medium water in through the water inlet 4 and returns it to the temperature-controlled water tank through the water outlet 6. The temperature-controlled medium water circulates within the water tank 5, transferring heat to or absorbing heat from the lubricating cylinder liner body 2, causing the lubricating cylinder liner body 2 to heat up or cool down. The temperature of the lubricating cylinder liner body 2 is stabilized at the desired experimental temperature by setting the target water temperature in the ECU unit 23. The ECU unit 23 controls the power motor 8 to drive the temperature-controlled cylinder liner body 1 to rotate reciprocatingly around the lubricating cylinder liner body 2, ensuring that the temperature-controlled cylinder liner body 1 transfers or absorbs heat to or from the lubricating cylinder liner body 2 more evenly and quickly, ensuring that the lubricating cylinder liner body 2 is heated evenly.

[0053] Step 3: The engine is running. The water temperature sensor and speed sensor transmit water temperature and speed signals to the ECU unit 23. The ECU unit 23 controls the lubricating oil injector 13 and lubricating oil pump 22 to provide a certain amount of lubricating oil. The ECU unit 23 also controls the lubricating oil injector 13 to spray lubricating oil once between two reciprocating motions of the piston, specifically when the piston is at bottom dead center. When there is sufficient lubricating oil between the cylinder liner and the piston, the lubricating oil is stored in the annular oil reservoir 17. If the amount of lubricating oil provided by the lubricating oil injector 13 is insufficient, the annular oil reservoir 17 automatically releases lubricating oil between the cylinder liner and the piston, ensuring that the experimental operating environment is close to the working environment of a thermodynamic engine.

[0054] In summary, the present invention provides a cylinder liner system suitable for temperature control and lubrication in optical engines. This system utilizes a temperature control system to precisely control the temperature of the lubricated cylinder liner, eliminating the impact of temperature fluctuations on experimental results within the same set of experiments. This system also ensures a more uniform temperature on the inner wall of the lubricated cylinder liner. Furthermore, the lubricating oil system reduces wear between the cylinder liner and piston ring, preventing cylinder scuffing. The engine operating environment more closely resembles the working environment of a thermodynamic engine, ensuring more convincing experimental results. Furthermore, the system replaces manual grease application, reducing cylinder head disassembly and assembly times and streamlining the experimental process.

[0055] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many variations without departing from the purpose of the present invention, and these are all protected by the present invention.

Claims

1. A cylinder liner system suitable for optical engine temperature control and lubrication, comprising a temperature control cylinder liner system, a lubrication cylinder liner system, a visualization piston system, and an electronic control system; characterized in that: The temperature control cylinder liner system comprises a temperature control cylinder liner body (1), a temperature control water tank (20) and two power motors (8); the temperature control cylinder liner body (1) is composed of two mutually nested sleeves, the space between the two sleeves is divided into ten water tanks (5) of the same size by a plurality of connecting ribs (9) arranged along the circumferential direction, and the ten water tanks are divided into two groups according to the series connection of five adjacent water tanks in the circumferential direction, and the positions of the series ports of adjacent water tanks (5) in the same group are arranged in an upper and lower interval staggered manner, and each group of water tanks has an inlet A water inlet (4) and a water outlet (6), the water inlet (4) and the water outlet (6) both pass through the outer wall of the temperature-controlled cylinder liner body (1) and are connected to a temperature-controlled water tank (20) via a water pipe (19); a high-pressure water pump is provided in the temperature-controlled water tank (20); the high-pressure water pump presses temperature-controlled medium water from the two water inlets (4) into two groups of water tanks between the two sleeves, the temperature-controlled medium water flows through the two groups of water tanks to transfer heat to or absorb heat from the lubricating cylinder liner system, and then flows back to the temperature-controlled water tank (20) from the water outlet (6); The two power motors (8) are symmetrically mounted below the temperature-controlled cylinder liner body (1), and the power motors (8) drive the temperature-controlled cylinder liner body (1) to rotate via a gear transmission mechanism; The lubricating cylinder liner system comprises a lubricating cylinder liner body (2), two lubricating oil injectors (13) and a lubricating oil pump (22); the lubricating oil injectors (13) and the lubricating oil pump (22) are connected via an oil pipe (21); an annular oil groove (10) is provided in the lower part of the lubricating cylinder liner body (2); 20 oil injection holes (11) leading to the interior of the lubricating cylinder liner body (2) are uniformly distributed along the circumference of the annular oil groove (10); the injection direction of the oil injection holes (11) is inclined with respect to the radial direction of the lubricating cylinder liner body (2); the two lubricating oil injectors (13) are respectively connected to the annular oil groove (10) via a lubricating oil pipeline (12); The temperature control cylinder liner body (1) is sleeved on the upper part of the lubricating cylinder liner body (2) with clearance fit; the power motor (8) drives the temperature control cylinder liner body (1) to rotate reciprocatingly around the lubricating cylinder liner body (2) through a gear transmission mechanism; the outer diameter of the lower part of the lubricating cylinder liner body (2) is the same as the outer diameter of the temperature control cylinder liner body (1); The visual piston system comprises a visual piston body (3) and a quartz glass window (18); two gas rings (14) and a slotted oil ring (15) are provided on the upper portion of the outer portion of the visual piston body (3) from top to bottom; an annular oil storage groove (17) is provided on the visual piston body (3) and located inside the slotted oil ring (15); the slotted oil ring (15) is provided with a communicating hole (16) that penetrates the annular oil storage groove (17); The lubricating oil is pressurized by the lubricating oil pump (22) and then pumped into the lubricating oil injector (13) and enters the annular oil groove (10). The lubricating oil is then sprayed between the lubricating cylinder liner body (2) and the slotted oil ring (15) through the oil spray hole (11); The electronic control system includes a water temperature sensor of a temperature-controlled water tank, an engine speed sensor, and an ECU unit, wherein the water temperature sensor, the engine speed sensor, the power motor (8), the high-pressure water pump, the lubricating oil pump (22), and the lubricating oil injector (13) are all connected to the ECU unit; The ECU unit determines the difference between the actual water temperature and the target water temperature based on the water temperature monitored in real time by the water temperature sensor, and controls the temperature control water tank (20) to heat or cool the cooling medium water; The ECU unit calculates the viscosity of the lubricating oil based on the water temperature information provided by the water temperature sensor of the temperature-controlled water tank, and then controls the lubricating oil pump (22) and the lubricating oil injector (13) to adjust the injection amount of the lubricating oil; The ECU unit controls the injection frequency of the lubricating oil injector (13) according to the speed information provided by the engine speed sensor, and performs a circumferential injection of lubricating oil between the cylinder liner and the piston after every two reciprocating movements of the piston; The ECU unit simultaneously controls the power motor to rotate forward and reverse at a fixed frequency.

2. The cylinder liner system suitable for optical engine temperature control and lubrication according to claim 1, characterized in that: The water inlet (4) is located at the top end of the temperature-controlled cylinder liner body (1), and the water outlet (6) is located at the bottom end of the temperature-controlled cylinder liner body (1).

3. The cylinder liner system suitable for optical engine temperature control and lubrication according to claim 1, characterized in that: The gear transmission mechanism comprises an annular outer gear ring (7) fixed to the bottom of the temperature-controlled cylinder sleeve body (1); the output end of the power motor (8) is provided with a gear meshing with the annular outer gear ring (7).

4. The cylinder liner system suitable for optical engine temperature control and lubrication according to claim 1, characterized in that: The forks of the two air rings (14) and one slotted oil ring (15) are arranged alternately.

5. The cylinder liner system suitable for optical engine temperature control and lubrication according to claim 1, characterized in that: The quartz glass window (18) is arranged on the visualization piston body (3) at one end of the piston head.

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