Engine oil temperature testing tool and engine oil temperature measuring method

Abstract

The invention relates to the technical field of engine oil temperature measurement, and particularly discloses an engine oil temperature testing tool and an engine oil temperature measuring method.The engine oil temperature testing tool comprises a fixing frame, a swinging part, a rotating part, an abutting part, a temperature sensor and a controller. According to the engine oil temperature testing tool, the temperature sensor does not need to be inserted into the engine bottom shell to measure the temperature of the engine oil, the temperature of the engine oil is obtained by measuring the temperature of the engine bottom shell and calculating the temperature through the controller, and in this way, the temperature of the engine oil can be accurately measured. The problems that in the prior art, an engine oil temperature sensor needs to be inserted into an engine bottom shell to measure the temperature of engine oil, consequently, engine oil splashes, and welding spots of the temperature sensor are prone to being broken due to continuous insertion and pulling are effectively solved, and meanwhile the problems that an engine oil dipstick pipe is too long, a hot test rack is insufficient in space and poor in operability are solved. And a standard engine oil temperature sensor cannot be used for measurement.

Description

Technical Field

[0001] The invention relates to the technical field of engine oil temperature measurement, and in particular to an engine oil temperature testing tool and an oil temperature measuring method. Background Art

[0002] Usually, the oil temperature is an indicator of the engine condition, and the current condition of the oil and the working condition of the engine can be known from the oil temperature. The existing engine oil temperature test tooling has the following problems when in use: the oil temperature sensor is constantly plugged in and out, resulting in the breakage of the oil temperature sensor solder joint; during the hot test, the crankshaft drives the oil to splash, causing oil dripping; the oil dipstick tube is too long, the hot test bench space is insufficient, the operability is poor, and it is impossible to use a standard oil temperature sensor for measurement. Summary of the invention

[0003] The purpose of the present invention is to provide an engine oil temperature testing tool and an oil temperature measuring method, so as to at least solve the problem in the prior art that an oil temperature sensor needs to be inserted into the engine pan to measure the oil temperature, resulting in oil splashing.

[0004] On the one hand, the present invention provides an engine oil temperature testing tool, which includes: a fixed frame, which can be connected to the guide rail of a thermal test bench; a swinging part, one end of which is arranged on the fixed frame, and the swinging part can swing in a vertical direction; a rotating part, one end of which can be rotatably arranged at the other end of the swinging part in a horizontal direction; an abutting part, which is connected to the other end of the rotating part and can abut against the engine bottom case; a temperature sensor, which is arranged on the abutting part and can measure the temperature of the engine bottom case; and a controller, which is electrically connected to the temperature sensor and can receive a temperature signal transmitted by the temperature sensor.

[0005] As an optional technical solution for the engine oil temperature testing tooling, the swinging part includes a first swinging frame, a swinging member and a second swinging frame. The first swinging frame is arranged on a fixed frame, and both ends of the swinging member are rotatably connected to the first swinging frame and the second swinging frame respectively. One end of the rotating part can be rotatably arranged on the second swinging frame in a horizontal direction, and the swinging member can swing in a vertical direction to drive the second swinging frame to swing, and the second swinging frame drives the rotating part to swing.

[0006] As an optional technical solution for the engine oil temperature test fixture, the swinging member is a gas spring, the cylinder body of the gas spring is rotatably connected to the first swing frame, and the piston rod of the gas spring is rotatably connected to the second swing frame.

[0007] As an optional technical solution for the engine oil temperature testing tooling, the first swing frame includes a first mounting plate, a first swing beam and a second swing beam. The first mounting plate is arranged on the fixed frame, and the two ends of the first swing beam are rotatably connected to the first mounting plate and the second swing frame respectively. The two ends of the second swing beam are rotatably connected to the first mounting plate and the second swing frame respectively, and the swing member is located between the first swing beam and the second swing beam.

[0008] As an optional technical solution for the engine oil temperature testing tool, the rotating part includes a rotating disk and a rotating beam. The rotating disk is rotatably arranged at the other end of the swinging part, one end of the rotating beam is arranged on the rotating disk, and the other end of the rotating beam is connected to the abutting part.

[0009] As an optional technical solution for the engine oil temperature testing tooling, the rotating disk includes a first disk, a second disk and an elastic pad. The first disk is arranged at the other end of the swinging part, one end of the elastic pad is connected to the first disk, the other end of the elastic pad is connected to the second disk, and one end of the rotating beam is arranged on the second disk.

[0010] As an optional technical solution for the engine oil temperature testing tooling, the abutment part includes a connecting plate and an abutment plate, one end of the connecting plate is connected to the other end of the rotating part, and the other end of the connecting plate is connected to the abutment plate. The temperature sensor is arranged on the abutment plate, and the abutment plate can abut against the engine bottom case.

[0011] As an optional technical solution for the engine oil temperature testing tool, the abutment portion also includes thermal insulation cotton arranged on the abutment plate, and the thermal insulation cotton wraps the temperature sensor.

[0012] As an optional technical solution for the engine oil temperature test fixture, the fixing frame includes a fixing seat and a fixing column. The fixing seat is connected to the guide rail of the thermal test bench through fasteners. The fixing column is connected to the fixing seat, and one end of the swinging part is arranged on the fixing column.

[0013] On the other hand, the present invention provides an oil temperature measurement method, which is applied to the engine oil temperature test tool in any of the above schemes, comprising:

[0014] Fix the fixing frame to the guide rail of the thermal test bench, and adjust the swinging part and the rotating part so that the abutting part abuts against the engine bottom shell;

[0015] The temperature of the engine bottom case is detected by a temperature sensor, and the detected temperature value is transmitted to the controller;

[0016] The controller adds the temperature value detected by the temperature sensor to the preset temperature compensation value to obtain the temperature of the engine oil in the engine sump.

[0017] As an optional technical solution for the oil temperature measurement method, the engine oil temperature test fixture also includes a temperature detector, and the preset temperature compensation values ​​include:

[0018] The temperature detector is extended into the engine sump, and the detected temperature value of the engine oil in the engine sump is transmitted to the controller;

[0019] The controller subtracts the temperature value of the engine bottom shell detected by the temperature sensor from the temperature value of the engine oil detected by the temperature detector to obtain a preset temperature compensation value.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides an engine oil temperature test tool, which includes a fixed frame, a swinging part, a rotating part, an abutting part, a temperature sensor and a controller. When testing the engine oil temperature, the fixed frame is first fixed on the guide rail of the hot test bench, and then the swinging part can apply an upward force to the rotating part. Then the staff adjusts the swinging part, the rotating part and the abutting part so that the abutting part can abut on the engine bottom shell. At this time, the temperature sensor and the engine bottom shell are in contact with each other to detect the temperature value of the engine bottom shell in real time. Since the controller is electrically connected to the temperature sensor, the controller can receive the temperature signal transmitted by the temperature sensor, and the controller can obtain the engine oil temperature after calculation. By adopting the engine oil temperature testing tool of the present invention, there is no need to insert the temperature sensor into the engine pan to measure the temperature of the engine oil. The temperature of the engine pan is measured and the engine oil temperature is obtained after calculation by the controller. This method effectively solves the problem in the prior art that it is necessary to insert the oil temperature sensor into the engine pan to measure the oil temperature, resulting in oil splashing and constant plugging and unplugging that easily leads to the breakage of the temperature sensor solder joint. At the same time, it can also avoid the oil dipstick tube being too long, insufficient space on the hot test bench, poor operability, and inability to use a standard oil temperature sensor for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an engine oil temperature testing tool in an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the engine oil temperature test tool in an embodiment of the present invention;

[0024] Figure 3 The figure is a flow chart of a method for measuring engine oil temperature in another embodiment of the present invention.

[0025] In the figure:

[0026] 1. Fixed frame; 11. Fixed seat; 12. Fixed column;

[0027] 2. Swinging part; 21. First swinging frame; 211. First mounting plate; 212. First swinging beam; 213. Second swinging beam; 22. Swinging member; 23. Second swinging frame;

[0028] 3. Rotating part; 31. Rotating disk; 311. First disk; 312. Second disk; 313. Elastic pad; 32. Rotating beam;

[0029] 4. abutment portion; 41. connection piece; 42. abutment plate;

[0030] 5. Temperature sensor. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] like Figure 1 to Figure 2 As shown, this embodiment provides an engine oil temperature test fixture, which includes a fixed frame 1, a swinging part 2, a rotating part 3, an abutting part 4, a temperature sensor 5 and a controller. Among them, one end of the swinging part 2 is arranged on the fixed frame 1, and the swinging part 2 can swing in the vertical direction to adjust the position of the abutting part 4 in the vertical direction, and one end of the rotating part 3 can be rotatably arranged at the other end of the swinging part 2 in the horizontal direction to adjust the position of the abutting part 4 in the horizontal direction.

[0036] When testing the engine oil temperature, first fix the fixing frame 1 on the guide rail of the hot test bench, then the swinging part 2 can apply an upward force to the rotating part 3, and then the staff adjusts the swinging part 2, the rotating part 3 and the abutting part 4 so that the abutting part 4 can abut on the engine bottom case. At this time, the temperature sensor 5 and the engine bottom case are in contact to detect the temperature value of the engine bottom case in real time. Since the controller is electrically connected to the temperature sensor 5, the controller can receive the temperature signal transmitted by the temperature sensor 5, and the controller can obtain the engine oil temperature after calculation. By adopting the engine oil temperature testing tool of the present invention, there is no need to insert the temperature sensor 5 into the engine pan to measure the temperature of the engine oil. The temperature of the engine pan is measured and the engine oil temperature is obtained after calculation by the controller. This method effectively solves the problem in the prior art that the oil temperature sensor 5 needs to be inserted into the engine pan to measure the oil temperature, resulting in oil splashing and constant plugging and unplugging that easily leads to the breakage of the temperature sensor solder joint. At the same time, it can also avoid the oil dipstick tube being too long, insufficient space on the hot test bench, poor operability, and inability to use a standard oil temperature sensor for measurement.

[0037] Optionally, the temperature sensor 5 includes but is not limited to a sheath-type thermocouple or the like.

[0038] In some embodiments, Figure 1As shown, the swinging part 2 includes a first swinging frame 21, a swinging member 22 and a second swinging frame 23. The first swinging frame 21 is arranged on the fixed frame 1, and the two ends of the swinging member 22 are rotatably connected to the first swinging frame 21 and the second swinging frame 23 respectively. In this arrangement, since the swinging member 22 can swing in the vertical direction, the swinging member 22 can drive the second swinging frame 23 to swing in the vertical direction; and one end of the rotating part 3 can be rotatably arranged on the second swinging frame 23 in the horizontal direction, so that the second swinging frame 23 drives the rotating part 3 to swing in the vertical direction.

[0039] Specifically, the swing member 22 includes but is not limited to a gas spring, the cylinder of the gas spring is rotatably connected to the first swing frame 21, and the piston rod of the gas spring is rotatably connected to the second swing frame 23. The piston rod of the gas spring can apply an upward force to the second swing frame 23, so that the abutment portion 4 can press against the engine bottom case.

[0040] Optionally, the swing member 22 may also be a hydraulic cylinder or the like.

[0041] Furthermore, the first swing frame 21 includes a first mounting plate 211, a first swing beam 212 and a second swing beam 213. The first mounting plate 211 is arranged on the fixed frame 1, and the two ends of the first swing beam 212 are rotatably connected to the first mounting plate 211 and the second swing frame 23, and the two ends of the second swing beam 213 are rotatably connected to the first mounting plate 211 and the second swing frame 23, respectively. At the same time, the swing member 22 is located between the first swing beam 212 and the second swing beam 213. In this arrangement, the structural strength between the first swing frame 21 and the second swing frame 23 can be enhanced by the first swing beam 212 and the second swing beam 213, thereby ensuring the stability and safety of the second swing frame 23 when swinging.

[0042] Optionally, the first mounting plate 211 includes a mounting block and a first plate body and a second plate body connected to both ends of the mounting block, the mounting block is connected to the fixing frame 1 through a fastener, one end of the first swing beam 212 and one end of the second swing beam 213 are both located between the first plate body and the second plate body, and are connected to the first plate body and the second plate body through a pin shaft.

[0043] Similarly, the second swing frame 23 includes a swing block and a third plate body and a fourth plate body connected to both ends of the swing block. One end of the rotating part 3 can be rotatably arranged on the swing block in the horizontal direction. The other end of the first swing beam 212 and the other end of the second swing beam 213 are both located between the third plate body and the fourth plate body, and are connected to the third plate body and the fourth plate body through a pin shaft.

[0044] In some embodiments, the rotating part 3 includes a rotating disk 31 and a rotating beam 32. The rotating disk 31 is rotatably disposed at the other end of the swinging part 2, one end of the rotating beam 32 is disposed on the rotating disk 31, and the other end of the rotating beam 32 is connected to the abutting part 4. In this arrangement, the rotating disk 31 can be rotated to drive the rotating beam 32 to rotate in the horizontal direction.

[0045] Optionally, the rotating part 3 also includes bolts and nuts, and the bolts pass through the swing block, the rotating disk 31 and the rotating beam 32 in sequence. By loosening the nuts, the staff can adjust the positions of the rotating disk 31 and the rotating beam 32 in the horizontal direction. After adjusting to the appropriate position, the nuts are tightened to fix the positions of the rotating disk 31 and the rotating beam 32.

[0046] like Figure 1 and Figure 2 As shown, the rotating disk 31 includes a first disk 311, a second disk 312 and an elastic pad 313. The first disk 311 is arranged at the other end of the swing part 2, one end of the elastic pad 313 is connected to the first disk 311, the other end of the elastic pad 313 is connected to the second disk 312, and one end of the rotating beam 32 is arranged on the second disk 312. The elastic pad 313 is arranged to apply elasticity to the second disk 312, thereby ensuring the stability of the second disk 312.

[0047] Optionally, the elastic pad 313 includes but is not limited to a polyurethane pad.

[0048] Specifically, the abutting portion 4 includes a connecting piece 41 and an abutting plate 42. One end of the connecting piece 41 is connected to the other end of the rotating portion 3, and the other end of the connecting piece 41 is connected to the abutting plate 42. By providing the connecting piece 41, it is convenient to connect the abutting plate 42. In addition, the temperature sensor 5 is provided on the abutting plate 42. Since the abutting plate 42 can abut against the engine bottom case, the temperature sensor 5 can fit with the engine bottom case to detect the temperature of the engine bottom case.

[0049] Furthermore, the abutment portion 4 also includes heat-insulating cotton arranged on the abutment plate 42, and the heat-insulating cotton is wrapped around the temperature sensor 5, so that the temperature sensor 5 can be kept warm, ensuring that when the temperature sensor 5 measures the temperature of the engine bottom case, the heat loss of the engine bottom case is reduced.

[0050] In some embodiments, the fixing frame 1 includes a fixing seat 11 and a fixing column 12. The fixing seat 11 is connected to the guide rail of the thermal test bench through a fastener, wherein the fastener is a diamond nut, which is convenient for matching with the shape of the guide rail of the thermal test bench and improving the connection strength; at the same time, the fixing column 12 is connected to the fixing seat 11, and one end of the swing part 2 is arranged on the fixing column 12. This makes it easy to adjust the height of the swing part 2.

[0051] Optionally, the fixing frame 1 further comprises a support block disposed on the fixing column 12 , one end of the swinging part 2 is located above the support block, and the support block can support the one end of the swinging part 2 .

[0052] like Figure 3 As shown, another embodiment of the present invention provides an oil temperature measurement method, which is applied to the engine oil temperature test fixture in the above scheme, including: fixing the fixing frame 1 to the guide rail of the hot test bench, and adjusting the swinging part 2 and the rotating part 3 to make the abutting part 4 abut against the engine bottom shell; detecting the temperature of the engine bottom shell by the temperature sensor 5, and transmitting the detected temperature value to the controller; using the controller to add the temperature value detected by the temperature sensor 5 and the preset temperature compensation value to obtain the temperature value of the oil in the engine bottom shell.

[0053] Among them, the engine oil temperature testing tool also includes a temperature detector, and the preset temperature compensation value includes: extending the temperature detector into the engine pan, and transmitting the detected temperature value of the oil in the engine pan to the controller; the controller subtracts the temperature value of the engine pan detected by the temperature sensor 5 from the temperature value of the oil detected by the temperature detector to obtain a preset temperature compensation value.

[0054] Measuring principle: During the engine hot test, after the oil temperature rises, the heat is dissipated to the engine bottom case. This method indirectly measures the engine oil temperature by using a temperature sensor 5 (armor-type thermocouple) in contact with the engine bottom case.

[0055] Among them, there is heat loss and reaction delay in the heat conduction process of engine oil.

[0056] Solve the problem of heat loss: insulate the temperature sensor 5 through the insulation cotton on the abutment plate 42 to ensure that when the temperature sensor 5 measures the temperature of the engine sump, the heat loss of the engine sump is reduced, and then directly measure the oil temperature by extending the temperature detector into the engine sump for comparison. In some embodiments, the temperature compensation value is 2°C, that is, the controller compensates 2°C to ensure that the measured engine oil temperature value is accurate.

[0057] Solve the problem of delayed heat conduction: By comparing with the temperature detector directly measuring the oil temperature in the engine sump, when switching the hot test measurement point, the temperature measurement time is delayed by about 5 seconds. After the hot test bench is evaluated, it does not affect the performance of the hot test bench. After the test oil temperature is stable, upload the data to the database.

[0058] Another embodiment of the present invention provides an oil temperature measurement method that also includes the following steps: electrically connecting the control box and the controller, switching the knob on the control box to the engine oil temperature test tool designed by the present invention, that is, electrically connecting the temperature sensor 5 and the controller; and adjusting the contact of the temperature sensor 5 in the engine oil temperature test tool to below the small head of the engine bottom case, and the contact surface with the engine bottom case should be a plane or a convex point position to ensure that the contact of the temperature sensor 5 is in full contact with the engine bottom case; after the engine hot test is completed, the rotating part 3 and the abutment part 4 of the engine oil temperature test tool are moved to the guide rail of the hot test bench to prevent the engine oil temperature test tool and the engine from being scratched; confirm that for the engine without an oil dipstick tube, there is a product protection cover at the oil duct. If not, install the process protection cover for test running, remove the process protection cover after the hot test, and finally upload the oil temperature test results.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An engine oil temperature test tool, characterized in that: include: A fixed frame (1) capable of being connected to a guide rail of a thermal test bench; A swinging portion (2), one end of the swinging portion (2) being arranged on the fixing frame (1), and the swinging portion (2) being capable of swinging in a vertical direction; A rotating part (3), one end of which is rotatably arranged at the other end of the swinging part (2) in a horizontal direction; An abutment portion (4) connected to the other end of the rotating portion (3) and capable of abutting against the engine bottom casing; A temperature sensor (5) is disposed on the abutment portion (4) and is capable of measuring the temperature of the engine bottom casing; The controller is electrically connected to the temperature sensor (5) and is capable of receiving a temperature signal transmitted by the temperature sensor (5).

2. The engine oil temperature test tool according to claim 1, characterized in that: The swinging part (2) comprises a first swinging frame (21), a swinging member (22) and a second swinging frame (23); the first swinging frame (21) is arranged on the fixed frame (1); two ends of the swinging member (22) are rotatably connected to the first swinging frame (21) and the second swinging frame (23); one end of the rotating part (3) is rotatably arranged on the second swinging frame (23) in a horizontal direction; the swinging member (22) can swing in a vertical direction to drive the second swinging frame (23) to swing; and the second swinging frame (23) drives the rotating part (3) to swing.

3. The engine oil temperature test tool according to claim 2, characterized in that: The swing member (22) is a gas spring, the cylinder body of the gas spring is rotatably connected to the first swing frame (21), and the piston rod of the gas spring is rotatably connected to the second swing frame (23).

4. The engine oil temperature test tool according to claim 2, characterized in that: The first swing frame (21) comprises a first mounting plate (211), a first swing beam (212) and a second swing beam (213); the first mounting plate (211) is arranged on the fixed frame (1); two ends of the first swing beam (212) are rotatably connected to the first mounting plate (211) and the second swing frame (23); two ends of the second swing beam (213) are rotatably connected to the first mounting plate (211) and the second swing frame (23); and the swing member (22) is located between the first swing beam (212) and the second swing beam (213).

5. The engine oil temperature test tool according to claim 1, characterized in that: The rotating part (3) comprises a rotating disk (31) and a rotating beam (32); the rotating disk (31) is rotatably arranged at the other end of the swinging part (2); one end of the rotating beam (32) is arranged on the rotating disk (31); and the other end of the rotating beam (32) is connected to the abutting part (4).

6. The engine oil temperature test tool according to claim 5, characterized in that: The rotating disk (31) comprises a first disk (311), a second disk (312) and an elastic pad (313); the first disk (311) is arranged at the other end of the swinging part (2); one end of the elastic pad (313) is connected to the first disk (311); the other end of the elastic pad (313) is connected to the second disk (312); and one end of the rotating beam (32) is arranged on the second disk (312).

7. The engine oil temperature test tool according to claim 1, characterized in that: The abutment portion (4) comprises a connecting piece (41) and an abutment disk (42); one end of the connecting piece (41) is connected to the other end of the rotating portion (3); the other end of the connecting piece (41) is connected to the abutment disk (42); the temperature sensor (5) is arranged on the abutment disk (42); and the abutment disk (42) is capable of abutting against the engine bottom casing.

8. The engine oil temperature test tool according to claim 7, characterized in that: The abutment portion (4) further comprises heat-insulating cotton arranged on the abutment plate (42), wherein the heat-insulating cotton wraps the temperature sensor (5).

9. The engine oil temperature test tool according to any one of claims 1 to 8, characterized in that: The fixing frame (1) comprises a fixing seat (11) and a fixing column (12); the fixing seat (11) is connected to the guide rail of the thermal test bench via a fastener; the fixing column (12) is connected to the fixing seat (11); and one end of the swinging portion (2) is arranged on the fixing column (12).

10. A method for measuring engine oil temperature, characterized in that: The engine oil temperature test fixture used in any one of claims 1 to 9 comprises: The fixing frame (1) is fixed to the guide rail of the thermal test bench, and the swinging part (2) and the rotating part (3) are adjusted so that the abutting part (4) abuts against the engine bottom casing; The temperature of the engine bottom casing is detected by the temperature sensor (5), and the detected temperature value is transmitted to the controller; The controller is used to add the temperature value detected by the temperature sensor (5) to a preset temperature compensation value to obtain the temperature value of the engine oil in the engine sump.

11. The oil temperature measurement method according to claim 10, wherein the engine oil temperature test tool further comprises a temperature detector, characterized in that: The preset temperature compensation values ​​include: Extending a temperature detector into the engine sump and transmitting the detected temperature value of the engine oil in the engine sump to the controller; The controller subtracts the temperature value of the engine oil detected by the temperature detector from the temperature value of the engine bottom casing detected by the temperature sensor (5) to obtain the preset temperature compensation value.

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