Compressor demand torque measuring device and compressor demand torque measuring method

Abstract

This invention discloses a compressor demand torque measuring device and a method for measuring compressor demand torque. The compressor demand torque measuring device includes a support, two side pulleys, a middle pulley, a lifting adjustment assembly, a sensor assembly, and a torque calculation mechanism. The two side pulleys are respectively disposed on both sides of the support. The lifting adjustment assembly is disposed on the support. The middle pulley is disposed at the end of the lifting adjustment assembly and located between the two side pulleys, with a gap forming between the top of the middle pulley and the bottom of the two side pulleys to accommodate a belt. The sensor assembly is disposed on the lifting adjustment assembly and is used to detect the torque measurement data corresponding to the middle pulley and send the torque measurement data to the torque calculation mechanism. The torque calculation mechanism is disposed at the head end of the lifting adjustment assembly and is used to obtain the compressor demand torque based on the target angle and the torque measurement data. This invention's compressor demand torque measuring device can obtain the compressor demand torque in the vehicle's overall condition.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a compressor demand torque measuring device and a compressor demand torque measuring method. Background Technology

[0002] The load on the engine idling speed caused by the compressor's torque demand is one of the main reasons for the increase in vibration and noise inside a gasoline-powered car when the air conditioning is on.

[0003] Currently, testing the compressor torque requirement of automobiles typically involves adding strain gauges to the compressor pulley. During testing, the strain gauges rotate at high speed with the compressor pulley, and the data needs to be transmitted wirelessly or temporarily stored in the testing device. This method is costly and impractical. Alternatively, the compressor torque requirement can be obtained by consulting a compressor torque characteristic diagram based on the measured condensing pressure, compressor speed, and duty cycle information. This measurement process is also complex. Furthermore, compressor torque diagrams for benchmark vehicles are difficult to obtain, making it difficult to meet the requirements for testing the compressor torque requirement of benchmark vehicles. Therefore, current testing methods cannot directly measure the compressor torque requirement on the entire vehicle, posing significant challenges to vehicle testing and the development of compressor torque performance indicators. Summary of the Invention

[0004] This invention provides a compressor demand torque measuring device and a compressor demand torque measuring method to solve the problem that the compressor demand torque cannot be directly measured on the vehicle.

[0005] on the one hand,

[0006] This invention provides a compressor torque demand measuring device, which is installed on an engine accessory, the engine accessory including a belt and a compressor; the compressor torque demand measuring device includes a support, two side pulleys, a middle pulley, a lifting adjustment assembly, a sensor assembly, and a torque calculation mechanism;

[0007] The two side pulleys are respectively disposed on both sides of the support, and the included angle between the two side pulleys and the support is the target angle;

[0008] The lifting adjustment component is mounted on the support and is movably connected to the support;

[0009] The intermediate pulley is disposed at the end of the lifting adjustment assembly and located between the two side pulleys. A gap is formed between the top of the intermediate pulley and the bottom of the two side pulleys to accommodate the belt.

[0010] The sensor assembly is mounted on the lifting adjustment assembly, contacts the intermediate pulley, and is connected to the torque calculation mechanism. It is used to detect the torque measurement data corresponding to the intermediate pulley and send the torque measurement data to the torque calculation mechanism.

[0011] The torque calculation mechanism is located at the head end of the lifting adjustment assembly and is used to acquire the torque measurement data and the target angle, and to acquire the required torque of the compressor based on the target angle and the torque measurement data.

[0012] Preferably, the compressor torque demand measuring device further includes two side pulley arms, which are respectively disposed on both sides of the support;

[0013] One end of each of the side pulley arms is hinged to the support, and the other end is movably connected to the side pulley.

[0014] Preferably, the support is provided with mounting holes for assembling the lifting adjustment assembly;

[0015] The lifting adjustment assembly includes a lifting screw and a lifting adjustment knob;

[0016] The lifting screw is disposed within the assembly hole;

[0017] The lifting adjustment knob is mounted on the support and slidably connected to the support. The lifting adjustment knob is threadedly connected to the lifting screw.

[0018] Preferably, the sensor assembly includes an angle sensor and a force sensor;

[0019] The angle sensor is mounted on the lifting adjustment knob and connected to the torque calculation mechanism. It is used to detect the rotation angle of the lifting screw relative to the support and send the rotation angle to the torque calculation mechanism.

[0020] The force sensor is located at the end of the lifting screw and connected to the torque calculation mechanism. It is used to detect the target tension applied by the belt to the intermediate pulley and send the target tension to the torque calculation mechanism. The torque calculation mechanism obtains the required torque of the compressor based on the target angle, the rotation angle and the target tension.

[0021] Preferably, obtaining the compressor's required torque based on the target angle, the rotation angle, and the target tension includes:

[0022] Based on the target angle and the rotation angle, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys;

[0023] The required torque of the compressor is obtained based on the belt angle and the target tension.

[0024] Preferably, determining the belt angle between the side pulley and the intermediate pulley, relative to the belt angle formed by the external tangents of the two side pulleys, based on the target angle and the rotation angle, includes:

[0025] Obtain the pitch of the lifting screw, the diameter of the compressor pulley, the length of the support, and the arm length of the side pulley arm;

[0026] The distance the end of the lifting screw moves relative to the support is determined based on the pitch of the lifting screw and the rotation angle.

[0027] The pulley distance between each side pulley and the middle pulley is determined based on the target angle, the length of the support, and the arm length of the side pulley arm.

[0028] Based on the travel distance and the pulley distance, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys.

[0029] Preferably, the target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the first tension is the tension applied by the belt to the intermediate pulley when the engine is idling.

[0030] The step of obtaining the compressor's required torque based on the belt angle and the target tension includes:

[0031] Obtain the diameter of the compressor pulley;

[0032] Determine the initial belt tension based on the belt angle and the first tension;

[0033] The real-time belt tension is determined based on the belt angle and the second tension.

[0034] The required torque of the compressor is obtained by calculating the diameter of the compressor pulley, the initial belt tension, and the real-time belt tension.

[0035] on the other hand,

[0036] This invention provides a method for measuring compressor demand torque, applied to the compressor demand torque measuring device described above, characterized in that it includes:

[0037] Obtain the target angle of each pulley relative to the support;

[0038] Acquire torque measurement data collected by the sensor assembly;

[0039] The required torque of the compressor is obtained based on the target angle and the torque measurement data.

[0040] Preferably, the sensor assembly includes an angle sensor and a force sensor, and the acquisition of torque measurement data collected by the sensor assembly includes:

[0041] The rotation angle of the lifting screw relative to the support, as detected by the angle sensor, is obtained;

[0042] The target tension force exerted by the belt on the intermediate pulley, as detected by the force sensor, is obtained;

[0043] The step of obtaining the compressor's required torque based on the target angle and the torque measurement data includes:

[0044] The required torque of the compressor is obtained based on the target angle, the rotation angle, and the target tension.

[0045] Preferably, obtaining the compressor's required torque based on the target angle, the rotation angle, and the target tension includes:

[0046] Based on the target angle and the rotation angle, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys;

[0047] The required torque of the compressor is obtained based on the belt angle and the target tension.

[0048] Preferably, determining the belt angle between the side pulley and the intermediate pulley, relative to the belt angle formed by the external tangents of the two side pulleys, based on the target angle and the rotation angle, includes:

[0049] Obtain the pitch of the lifting screw, the length of the support, and the arm length of the side pulley arm;

[0050] The distance the end of the lifting screw moves relative to the support is determined based on the pitch of the lifting screw and the rotation angle.

[0051] The pulley distance between each side pulley and the middle pulley is determined based on the target angle, the length of the support, and the arm length of the side pulley arm.

[0052] Based on the travel distance and the pulley distance, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys.

[0053] Preferably, the target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the first tension is the tension applied by the belt to the intermediate pulley when the engine is idling.

[0054] The step of obtaining the compressor's required torque based on the belt angle and the target tension includes:

[0055] Obtain the diameter of the compressor pulley;

[0056] Determine the initial belt tension based on the belt angle and the first tension;

[0057] The real-time belt tension is determined based on the belt angle and the second tension.

[0058] The required torque of the compressor is obtained by calculating the diameter of the compressor pulley, the initial belt tension, and the real-time belt tension.

[0059] The compressor torque demand measuring device provided in this invention has a simple structure and is miniaturized. The support is mounted on a non-rotating component of the engine accessory (such as the generator and compressor), ensuring a stable installation. This allows the entire device to be mounted on the engine accessory, measuring the compressor torque demand under the condition of the entire vehicle, making the measurement convenient and efficient. Furthermore, because the compressor torque demand measuring device is mounted on the engine accessory, it operates under the same environmental conditions and air conditioning mode as the engine, enabling the measurement of compressor torque demand under different operating conditions (different ambient temperatures and different air conditioning modes). Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention 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.

[0061] Figure 1 This is a schematic diagram of the compressor demand torque measuring device in one embodiment of the present invention;

[0062] Figure 2 yes Figure 1 Front view of the compressor torque demand measurement device;

[0063] Figure 3 This is a flowchart illustrating a compressor torque demand measurement method according to an embodiment of the present invention;

[0064] Figure 4This is another flowchart illustrating the compressor required torque measurement method in one embodiment of the present invention;

[0065] Figure 5 This is another flowchart illustrating the compressor required torque measurement method in one embodiment of the present invention;

[0066] Figure 6 This is another flowchart illustrating the compressor required torque measurement method in one embodiment of the present invention;

[0067] Figure 7 This is another flowchart illustrating the compressor torque demand measurement method in one embodiment of the present invention.

[0068] Among them, 10 is the support; 20 is the side pulley; 30 is the intermediate pulley; 40 is the lifting adjustment assembly; 41 is the lifting screw; 42 is the lifting adjustment knob; 50 is the force sensor; 60 is the torque calculation mechanism; and 70 is the belt. Detailed Implementation

[0069] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0070] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] like Figure 1As shown, this embodiment of the invention provides a compressor demand torque measuring device, installed on an engine accessory, which includes a belt 70 and a compressor. The compressor demand torque measuring device includes a support 10, two side pulleys 20, a middle pulley 30, a lifting adjustment assembly 40, a sensor assembly, and a torque calculation mechanism 60. The two side pulleys 20 are respectively disposed on both sides of the support 10, and the included angles between the two side pulleys 20 and the support 10 are both target angles. The lifting adjustment assembly 40 is disposed on the support 10 and movably connected to the support 10. The middle pulley 30 is disposed on the lifting adjustment assembly 40. The middle pulley 30 is located at the end of the lifting adjustment assembly 40, between the two side pulleys 20, and a gap is formed between the top of the middle pulley 30 and the bottom of the two side pulleys 20 to accommodate the belt 70; the sensor assembly is set on the lifting adjustment assembly 40, in contact with the middle pulley 30, and connected to the torque calculation mechanism 60, for detecting the torque measurement data corresponding to the belt 70 and the middle pulley 30, and sending the torque measurement data to the torque calculation mechanism 60; the torque calculation mechanism 60 is set at the head end of the lifting adjustment assembly 40, for acquiring the torque measurement data and the target angle, and for obtaining the required torque of the compressor based on the target angle and the torque measurement data.

[0073] In this embodiment, the engine accessories also include crankshaft pulley, generator, compressor, water pump and compressor pulley, etc., and belt 70 is sleeved on crankshaft pulley, generator, compressor, water pump and compressor pulley.

[0074] Specifically, when installing the compressor demand torque measuring device, the support 10 is installed on the non-rotating parts of the engine accessory (non-rotating parts are mechanisms that do not need to rotate, such as generators and compressors), and the installation is stable to ensure the overall stability of the compressor demand torque measuring device, providing technical support for subsequent accurate measurement data; the belt 70 is placed in the gap formed between the middle pulley 30 and the two side pulleys 20, and the belt 70 is movably connected to the two side pulleys 20 and the middle pulley 30. Therefore, the entire device is installed on the engine accessory, realizing the measurement of compressor demand torque in the whole vehicle state.

[0075] When the compressor torque demand measuring device measures, the intermediate pulley 30 is adjusted using the lifting adjustment component 40 to move the intermediate pulley 30 closer to the support 10 until the two side pulleys 20 and the intermediate pulley 30 tighten the belt 70. The belt 70 is kept taut to prevent it from falling off the two side pulleys 20 and the intermediate pulley 30 during measurement. The sensor component detects the torque measurement data corresponding to the belt 70 and the intermediate pulley 30. The torque calculation mechanism 60 calculates the compressor torque demand based on the target angle formed by the side pulleys 20 and the support 10 and the torque measurement data sent by the sensor component. This allows the compressor torque demand to be obtained even when the vehicle is in its entirety, making the operation simple and convenient.

[0076] The compressor torque demand measuring device in this embodiment has a simple structure and is miniaturized. The support 10 is mounted securely on a non-rotating component of the engine accessory (such as the generator and compressor). This allows the entire device to be mounted on the engine accessory, measuring the compressor torque demand under the condition of the entire vehicle, making the measurement convenient and efficient. Furthermore, because the compressor torque demand measuring device is mounted on the engine accessory, it operates under the same environmental conditions and air conditioning mode as the engine, enabling the measurement of compressor torque demand under different operating conditions (different ambient temperatures and different air conditioning modes).

[0077] As an example, such as Figure 1 As shown, the compressor demand torque measuring device also includes two side pulley arms, which are respectively arranged on both sides of the support 10; one side of each side pulley arm is hinged to the support 10, and the other end is movably connected to the side pulley 20.

[0078] In this embodiment, one end of each pulley arm is hinged to the support 10, so that the pulley arm and the support 10 form a target angle using damping force, providing technical support for subsequent compressor torque demand measurement. It should be noted that the two target angles formed by the two pulley arms and the support 10 are equal. The hinged connection of one side of each pulley arm to the support 10 allows for flexible adjustment of the position of the pulley 20, providing technical support for measuring the compressor torque demand at different target angles.

[0079] Furthermore, to ensure the stability of the target angle, a limiting member can be set at the connection between the side pulley arm and the support 10 to ensure that the side pulley arm and the support 10 maintain the target angle during the test. In order to facilitate the determination of the target angle, the limiting member can be a limiting member with an angle value. Therefore, it is convenient to quickly determine the target angle and ensure that the target angles formed by the two side pulley arms and the support 10 are equal.

[0080] Understandably, each side pulley 20 can also be fixedly mounted on the side pulley arm, as long as both side pulleys 20 can be rotatably mounted on the support 10.

[0081] As an example, such as Figure 1 As shown, the support 10 is provided with an assembly hole for assembling the lifting adjustment assembly 40; the lifting adjustment assembly 40 includes a lifting screw 41 and a lifting adjustment knob 42; the lifting screw 41 is disposed in the assembly hole; the lifting adjustment knob 42 is disposed on the support 10 and slidably connected to the support 10, and the lifting adjustment knob 42 is threadedly connected to the lifting screw 41.

[0082] In this embodiment, the lifting adjustment knob 42 is mounted on the support 10. The lifting screw 41 is threadedly connected to the lifting adjustment knob 42. By rotating the lifting adjustment knob 42, the end of the lifting screw 41 with the intermediate pulley 30 is moved closer to the support 10 to adjust the tension of the belt 70. When the belt 70 is kept taut, measurement can be performed to ensure the accuracy and precision of the measurement data. For example, rotating the lifting adjustment knob 42 clockwise moves the end of the lifting screw 41 with the intermediate pulley 30 closer to the support 10.

[0083] As an example, such as Figure 1 As shown, the sensor assembly includes an angle sensor (not shown) and a force sensor 50. The angle sensor, located on the lifting adjustment knob 42 and connected to the torque calculation mechanism 60, is used to detect the rotation angle of the lifting screw 41 relative to the support 10 and send the rotation angle to the torque calculation mechanism 60. The force sensor 50, located at the end of the lifting screw 41 and connected to the torque calculation mechanism 60, is used to detect the target tension applied by the belt 70 to the intermediate pulley 30 and send the target tension to the torque calculation mechanism 60. The torque calculation mechanism 60 obtains the required torque of the compressor based on the target angle, rotation angle, and target tension.

[0084] In this embodiment, the rotation angle of the lifting screw 41 relative to the support 10 can be obtained by detecting the angle of the lifting adjustment knob 42 using an angle sensor; the target tension applied by the belt 70 to the intermediate pulley 30 is detected by the force sensor 50 to improve the detection accuracy.

[0085] Specifically, the compressor torque measurement device also includes a connector that is connected to the force sensor 50 and the intermediate pulley 30. Therefore, when the belt 70 applies tension to the intermediate pulley 30, it is transmitted to the force sensor 50 through the connector so that the force sensor 50 can measure the target tension.

[0086] As one embodiment, obtaining the compressor's required torque based on the target angle, rotation angle, and target tension includes: determining the belt angle formed by the belt 70 located between the side pulley 20 and the intermediate pulley 30 relative to the external tangents of the two side pulleys 20 based on the target angle and rotation angle; and obtaining the compressor's required torque based on the belt angle and the target tension.

[0087] In this embodiment, the external tangents of the two side pulleys 20 are the tangents located on the belt 70.

[0088] Specifically, when the compressor torque measurement device is working, the intermediate pulley 30 is adjusted using the lifting adjustment component 40 to pull the intermediate pulley 30 upwards until the intermediate pulley 30 and the two side pulleys 20 tighten the belt 70, forming a belt angle with respect to the external tangents of the two side pulleys 20. Using the principle of similar triangles, the belt angle, target angle, and target tension are calculated to obtain the compressor torque requirement. The calculation method is simple and highly feasible. Understandably, since the lifting screw 41 is cylindrical, the distance the end of the lifting screw 41 rises relative to the support 10 can be determined based on the rotation angle. By making the extensions of the side pulley arms intersect at a point, the distance between the intermediate pulley 30 and the side pulleys 20 can be determined based on the target angle using isosceles triangle principles. Thus, the belt angle can be obtained using trigonometric relationships.

[0089] As one embodiment, the belt angle between the side pulley 20 and the intermediate pulley 30, relative to the external tangents of the two side pulleys 20, is determined based on the target angle and the rotation angle. This includes: obtaining the pitch of the lifting screw 41, the diameter of the compressor pulley, the length of the support 10, and the arm length of the side pulley arm; determining the movement distance of the end of the lifting screw 41 relative to the support 10 based on the pitch of the lifting screw 41 and the rotation angle; determining the pulley distance between each side pulley 20 and the intermediate pulley 30 based on the target angle, the length of the support 10, and the arm length of the side pulley arm; and determining the belt angle between the belt 70 between the side pulleys 20 and the intermediate pulley 30, relative to the external tangents of the two side pulleys 20, based on the movement distance and the pulley distance.

[0090] Specifically, such as Figure 2 As shown, the angle formed by the intersection of the extended lines of the two side pulley arms is ∠1, the belt angle is ∠2, and the target angle is ∠3. Understandably, this target angle can be obtained through measurement by the operator. The length of support 10 is L1, the length of the side pulley arm is L2, and the length from support 10 to the point where the extended lines of the two side pulley arms intersect is X. The length from one of the side pulleys 20 to the middle pulley 30 is Y. Understandably, the lengths of support 10 and the side pulley arms can be obtained through measurement by the operator. Since the lengths of the two side pulley arms are equal and the two target angles formed by the two side pulley arms and support 10 are equal, using the principle of isosceles triangles, we can obtain... The rotation angle of the lifting screw 41 is A, and the pitch of the lifting screw 41 is Lc, detected by the angle sensor. Dividing the product of the rotation angle and the pitch by 360° yields the movement data L3 of the lifting screw 41 relative to the support 10. Therefore, according to the trigonometric function relationship, we can obtain: therefore,

[0091] therefore, The principle of measuring the belt angle in this embodiment is relatively simple, feasible, and easy to operate.

[0092] As one embodiment, the target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the first tension is the tension applied by the belt to the intermediate pulley when the engine is idling; obtaining the compressor's required torque based on the belt angle and the target tension includes: obtaining the diameter of the compressor pulley; determining the initial belt tension based on the belt angle and the first tension; determining the real-time belt tension based on the belt angle and the second tension; and calculating the compressor's required torque by calculating the diameter of the compressor pulley, the initial belt tension, and the real-time belt tension.

[0093] When the intermediate pulley 30 experiences a first tension F0 from the belt 70, and a second tension F1 from the belt 70, where F0 and F1 are tension data detected by the force sensor; assuming the initial belt tension on the belt 70 is F2 when the engine is not running, and the real-time belt tension on the belt 70 is F3 when the engine is idling; decomposing F0 and F1, we can obtain... Therefore, the required torque M of the compressor can be obtained using the torque calculation formula. In this embodiment, the compressor torque demand measuring device is installed on the engine accessory. By utilizing the characteristics of force and the principle of triangles, the compressor torque demand can be measured under the condition of the whole vehicle. The method is simple and highly feasible.

[0094] As one embodiment, the torque calculation mechanism 60 includes a display and a microcomputer connected to the display. The microcomputer is electrically connected to a sensor assembly to acquire torque measurement data sent by the sensor assembly.

[0095] In this embodiment, the sensor assembly is installed within the compressor torque demand measurement device to achieve electrical connection between the microcomputer and the sensor assembly. This eliminates the need for data storage or wireless transmitter access, reducing costs and improving equipment reliability. The display shows the compressor torque demand in real time, facilitating operation and data viewing for staff.

[0096] like Figure 3 As shown, this embodiment provides a method for measuring the required torque of a compressor, applied to the compressor required torque measuring device described above, including the following steps performed by a torque calculation mechanism:

[0097] S301: Obtain the target angle of each pulley relative to the support.

[0098] The target angle is the angle between each pulley 20 and the support 10. In this embodiment, two pulleys 20 are respectively disposed on both sides of the support 10. Each pulley 20 can be fixedly connected to or hinged to the support 10, as long as it can be ensured that the pulleys 20 can rotate and the target angles are equal. It can be understood that when the pulleys 20 are hinged to the support 10, the target angle can be adjusted according to actual needs to measure the compressor's required torque at different target angles.

[0099] S302: Acquire torque measurement data collected by the sensor assembly.

[0100] When the compressor torque measurement device is working, the support 10 is installed on a non-rotating part of the engine accessory (such as a generator and compressor, which do not need to rotate), ensuring a stable installation and strong measurement feasibility. The belt 70 is placed in the gap formed between the middle pulley 30 and the two side pulleys 20, and the belt 70 is movably connected to the two side pulleys 20 and the middle pulley 30. The middle pulley 30 is adjusted using the lifting adjustment component 40, causing it to move closer to the support 10 until the three pulleys fix the belt 70, while simultaneously tightening the belt 70. The sensor component detects the torque measurement data corresponding to the belt 70 and the middle pulley 30, making torque measurement data acquisition convenient and effectively ensuring data accuracy.

[0101] S303: Obtain the required torque of the compressor based on the target angle and torque measurement data.

[0102] In this embodiment, the torque calculation mechanism 60 obtains the target angle formed by the side pulley 20 and the support 10 and the torque measurement data sent by the sensor assembly, and calculates the required torque of the compressor based on the torque measurement data. This allows the compressor to be obtained in the vehicle state, and the operation is simple and convenient.

[0103] The compressor torque demand measurement method provided in this embodiment obtains the target angle of each pulley 20 relative to the support 10. The support 10, a non-rotating component mounted on the engine accessory, ensures stable installation. Torque measurement data is acquired from the sensor assembly, which is convenient and effectively ensures data accuracy. Based on the target angle and torque measurement data, the compressor torque demand is obtained, enabling the determination of the compressor torque demand under vehicle conditions, making the operation simple and convenient.

[0104] As an example, such as Figure 4 As shown, step S302, where the sensor assembly includes an angle sensor and a force sensor, involves acquiring torque measurement data collected by the sensor assembly, including:

[0105] S401: Acquire the rotation angle of the lifting screw relative to the support, detected by the angle sensor.

[0106] In this embodiment, after placing the belt 70 in the gap between the middle pulley 30 and the two side pulleys 20, the lifting adjustment knob 42 is rotated to make the lifting screw 41 rotate relative to the support 10. The rotation angle of the lifting screw 41 relative to the support 10 is detected by the angle sensor, which facilitates the acquisition of the rotation angle and improves the accuracy of the rotation angle.

[0107] S402: Acquire the target tension force exerted by the belt on the intermediate pulley, detected by the force sensor.

[0108] In this embodiment, when the engine is not running, the force sensor 50 detects the tension applied by the belt 70 to the intermediate pulley 30, and the tension applied by the belt 70 to the intermediate pulley 30 when the engine is idling, so as to obtain the target tension. Using the force sensor 50 to collect the target tension can improve the accuracy of the target tension.

[0109] S403: Obtain the required torque of the compressor based on the target angle, rotation angle, and target tension.

[0110] Specifically, the torque calculation mechanism inputs the target angle, rotation angle, and target tension as parameters into the torque calculation formula to obtain the compressor's required torque. It then uses data collected by angle and force sensors to quickly obtain the compressor's required torque.

[0111] The compressor torque measurement method provided in this embodiment obtains the rotation angle of the lifting screw 41 relative to the support 10 detected by the angle sensor. Using the angle sensor to detect the rotation angle of the lifting screw 41 relative to the support 10 facilitates the acquisition of the rotation angle and improves its accuracy. It also obtains the target tension force applied by the belt 70 to the intermediate pulley 30 detected by the force sensor 50, facilitating the acquisition of the target tension force and improving its accuracy.

[0112] As an example, such as Figure 5 As shown, step S403, which involves obtaining the compressor's required torque based on the target angle, rotation angle, and target tension, includes:

[0113] S501: Determine the belt angle between the side pulley and the middle pulley, relative to the external tangents of the two side pulleys, based on the target angle and rotation angle.

[0114] In this embodiment, the external tangents of the two side pulleys 20 are the tangents located on the belt 70.

[0115] Specifically, the intermediate pulley 30 is adjusted using the lifting adjustment assembly 40 to pull it upwards until the intermediate pulley 30 and the two side pulleys 20 tighten the belt 70, forming a belt angle with respect to the external tangents of the two side pulleys 20. Understandably, since the lifting screw 41 is cylindrical, the distance the end of the lifting screw 41 rises relative to the support 10 can be determined based on the rotation angle. By intersecting the extensions of the side pulley arms at a single point, and using the principle of isosceles triangles, the distance between the intermediate pulley 30 and the side pulleys 20 can be determined based on the target angle. Thus, the belt angle can be obtained using trigonometric relationships.

[0116] S502: Obtain the required torque of the compressor based on the belt angle and target tension.

[0117] Specifically, since the target tension is the force exerted by the belt on the intermediate pulley, the target tension is decomposed to obtain the required torque of the compressor based on the belt angle and the target tension. The calculation method is simple and highly feasible.

[0118] The compressor torque demand measurement method provided in this embodiment determines the belt angle formed by the belt located between the side pulleys and the intermediate pulley, relative to the external tangents of the two side pulleys, based on the target angle and the rotation angle. The compressor torque demand is obtained based on the belt angle and the target tension. This method of obtaining the compressor torque demand based on the belt angle and target tension is simple in principle, convenient to operate, and highly feasible.

[0119] As an example, such as Figure 6 As shown, step S501, which involves determining the belt angle between the side pulleys and the middle pulley based on the target angle and the rotation angle, relative to the belt angle formed by the external tangents of the two side pulleys, includes:

[0120] S601: Obtain the pitch of the lifting screw, the length of the support, and the arm length of the side pulley arm.

[0121] In this embodiment, a measuring tool is used to measure the lifting screw 41, the support 10, and the side pulley arm, so as to send the pitch of the lifting screw 41, the length of the support 10, and the arm length of the side pulley arm to the torque calculation mechanism.

[0122] S602: Determine the distance the end of the lifting screw moves relative to the support based on the pitch and rotation angle of the lifting screw.

[0123] S603: Determine the pulley distance between each side pulley and the middle pulley based on the target angle, the length of the support, and the arm length of the side pulley arm.

[0124] S604: Determine the belt angle between the side pulleys and the middle pulley, relative to the external tangents of the two side pulleys, based on the travel distance and pulley distance.

[0125] Specifically, when the compressor torque measuring device is working, the intermediate pulley 30 is adjusted using the lifting adjustment assembly 40 to pull the intermediate pulley 30 upwards until the intermediate pulley 30 and the two side pulleys 20 fix the belt 70, and the belt 70 forms a belt angle with the horizontal line; for example Figure 2 As shown, the angle formed by the intersection of the extended lines of the two side pulley arms is ∠1, the belt angle is ∠2, and the target angle is ∠3. Understandably, this target angle can be obtained through measurement by the operator. The length of the support 10 is L1, the length of the side pulley arm is L2, and the length from the support 10 to the point where the extended lines of the two side pulley arms intersect is X. The length from one of the side pulleys 20 to the middle pulley 30 is Y. Understandably, the lengths of the support 10 and the side pulley arms can be obtained through measurement by the operator. Since the lengths of the two side pulley arms are equal and the two target angles formed by the two side pulley arms and the support 10 are equal, we can obtain... The rotation angle of the lifting screw 41 is A, and the pitch of the lifting screw 41 is Lc, detected by the angle sensor. Dividing the product of the rotation angle and the pitch by 360° yields the movement data L3 of the lifting screw 41 relative to the support 10.

[0126] According to the trigonometric function relationships, we can obtain:

[0127] therefore, The distance between the pulleys is

[0128] Therefore, the belt angle is

[0129]

[0130] The compressor torque demand measurement method provided in this embodiment determines the movement distance of the lifting screw end relative to the support based on the screw pitch and rotation angle. The pulley distance between each side pulley and the intermediate pulley is determined based on the target angle, the support length, and the arm length of the side pulley arm. Based on the movement distance and pulley distance, the belt angle between the belt located between the side pulleys and the intermediate pulley, relative to the external tangents of the two side pulleys, is determined. This method is simple to operate and allows for compressor torque demand measurement on the entire vehicle.

[0131] As one embodiment, the target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the second tension is the tension applied by the belt to the intermediate pulley when the engine is idling.

[0132] like Figure 7As shown, step S502, which involves obtaining the required torque of the compressor based on the belt angle and the target tension, includes:

[0133] S701: Obtain the diameter of the compressor pulley.

[0134] S702: Determine the initial belt tension based on the belt angle and the first tension.

[0135] S703: Determine the real-time belt tension based on the belt angle and the second tension.

[0136] S704: Calculates the diameter of the compressor pulley, the initial belt tension, and the real-time belt tension to obtain the required torque of the compressor.

[0137] Specifically, when the intermediate pulley 30 is subjected to a first tension F0 by the belt 70, and a second tension F1 by the belt 70, F0 and F1 are the data detected by the example sensor; the initial belt tension of the belt 70 when the engine is not running is F2; ​​the real-time belt tension of the belt 70 when the engine is idling is F3; by decomposing F0 and F1, we can obtain and Therefore, the compressor requires a torque M of... In this embodiment, the method for calculating the compressor torque based solely on data such as the belt angle and the diameter of the compressor pulley is simple and does not require a compressor torque characteristic diagram, making it easy to implement.

[0138] The compressor torque demand measurement method provided in this embodiment obtains the diameter of the compressor pulley. The initial belt tension is determined based on the belt angle and a first tension. The real-time belt tension is determined based on the belt angle and a second tension. The compressor torque demand is obtained by calculating the compressor pulley diameter, initial belt tension, and real-time belt tension. This method is simple to operate and can be used to detect compressor torque demand on a complete vehicle. It only requires data such as the belt angle and compressor pulley diameter to calculate the compressor torque, making it simple to implement and eliminating the need for a compressor torque characteristic diagram.

[0139] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A compressor torque demand measuring device, mounted on an engine accessory, said engine accessory including a belt and a compressor; characterized in that, The compressor torque demand measuring device includes a support, two side pulleys, a middle pulley, a lifting adjustment assembly, a sensor assembly, and a torque calculation mechanism; The two side pulleys are respectively disposed on both sides of the support, and the included angle between the two side pulleys and the support is the target angle; The lifting adjustment component is mounted on the support and is movably connected to the support; The intermediate pulley is disposed at the end of the lifting adjustment assembly and located between the two side pulleys. A gap is formed between the top of the intermediate pulley and the bottom of the two side pulleys to accommodate the belt. The lifting adjustment assembly includes a lifting screw and a sensor assembly, which is disposed on the lifting adjustment assembly, contacts the intermediate pulley, and is connected to the torque calculation mechanism. The sensor assembly is used to detect the rotation angle of the lifting screw relative to the support and the target tension applied by the belt to the intermediate pulley, and to send the rotation angle and the target tension to the torque calculation mechanism. The torque calculation mechanism is located at the head end of the lifting adjustment assembly and is used to obtain the rotation angle, the target tension, and the target angle. Based on the target angle and the rotation angle, it determines the belt angle formed by the belt between the side pulley and the intermediate pulley relative to the external tangents of the two side pulleys. Based on the belt angle and the target tension, it obtains the required torque of the compressor.

2. The compressor demand torque measuring device of claim 1, wherein, The compressor torque demand measuring device also includes two side pulley arms, which are respectively arranged on both sides of the support; One end of each of the side pulley arms is hinged to the support, and the other end is movably connected to the side pulley.

3. The compressor demand torque measuring device of claim 1, wherein, The support is provided with mounting holes for assembling the lifting adjustment assembly; The lifting adjustment assembly also includes a lifting adjustment knob; The lifting screw is disposed within the assembly hole; The lifting adjustment knob is mounted on the support and slidably connected to the support. The lifting adjustment knob is threadedly connected to the lifting screw.

4. The compressor demand torque measuring device of claim 3, wherein, The sensor assembly includes an angle sensor and a force sensor; The angle sensor is mounted on the lifting adjustment knob and connected to the torque calculation mechanism, and is used to detect the rotation angle of the lifting screw relative to the support. The force sensor is located at the end of the lifting screw and connected to the torque calculation mechanism, and is used to detect the target tension applied by the belt to the intermediate pulley.

5. The compressor demand torque measuring device of claim 4, wherein, The step of determining the belt angle between the side pulley and the intermediate pulley, relative to the belt angle formed by the external tangents of the two side pulleys, based on the target angle and the rotation angle, includes: Obtain the pitch of the lifting screw, the diameter of the compressor pulley, the length of the support, and the arm length of the side pulley arm; The distance the end of the lifting screw moves relative to the support is determined based on the pitch of the lifting screw and the rotation angle. The pulley distance between each side pulley and the middle pulley is determined based on the target angle, the length of the support, and the arm length of the side pulley arm. Based on the travel distance and the pulley distance, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys.

6. The compressor demand torque measuring device of claim 5, wherein, The target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the first tension is the tension applied by the belt to the intermediate pulley when the engine is idling. The step of obtaining the compressor's required torque based on the belt angle and the target tension includes: Obtain the diameter of the compressor pulley; Determine the initial belt tension based on the belt angle and the first tension; The real-time belt tension is determined based on the belt angle and the second tension. The required torque of the compressor is obtained by calculating the diameter of the compressor pulley, the initial belt tension, and the real-time belt tension.

7. A method of measuring compressor demand torque, applied to the compressor demand torque measuring device according to any one of claims 1 to 6, characterized by, include: Obtain the target angle of each pulley relative to the support; Acquire torque measurement data collected by the sensor assembly; The required torque of the compressor is obtained based on the target angle and the torque measurement data.

8. The method of claim 7, wherein the step of measuring the compressor demand torque is performed by a torque sensor. The sensor assembly includes an angle sensor and a force sensor, and the acquisition of torque measurement data collected by the sensor assembly includes: The rotation angle of the lifting screw relative to the support, detected by the angle sensor, is obtained; The target tension force exerted by the belt on the intermediate pulley, as detected by the force sensor, is obtained; The step of obtaining the compressor's required torque based on the target angle and the torque measurement data includes: Based on the target angle and the rotation angle, determine the belt angle formed by the belt between the side pulley and the middle pulley relative to the external tangents of the two side pulleys; The required torque of the compressor is obtained based on the belt angle and the target tension.

9. The compressor torque demand measurement method as described in claim 8, characterized in that, The step of determining the belt angle between the side pulley and the intermediate pulley, relative to the belt angle formed by the external tangents of the two side pulleys, based on the target angle and the rotation angle, includes: Obtain the pitch of the lifting screw, the length of the support, and the arm length of the side pulley arm; The distance the end of the lifting screw moves relative to the support is determined based on the pitch of the lifting screw and the rotation angle. The pulley distance between each side pulley and the middle pulley is determined based on the target angle, the length of the support, and the arm length of the side pulley arm. Based on the travel distance and the pulley distance, determine the belt angle formed by the belt located between the side pulley and the middle pulley relative to the external tangents of the two side pulleys.

10. The method of claim 9, wherein the step of measuring the compressor demand torque is performed by a torque sensor. The target tension includes a first tension and a second tension; the first tension is the tension applied by the belt to the intermediate pulley when the engine is not running; the first tension is the tension applied by the belt to the intermediate pulley when the engine is idling. The step of obtaining the compressor's required torque based on the belt angle and the target tension includes: Obtain the diameter of the compressor pulley; Determine the initial belt tension based on the belt angle and the first tension; The real-time belt tension is determined based on the belt angle and the second tension. The diameter of the compressor pulley, the initial belt tension and the real-time belt tension are calculated to obtain a compressor demand torque.

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