A clutch pedal travel curve measurement method and device

Abstract

The present invention provides a clutch pedal stroke curve measurement method, comprising: obtaining a curve of the pedal distance difference of the clutch pedal changing with time; obtaining a relationship function between the clutch pedal stroke and the pedal distance difference according to the initial pedal distance, the current pedal distance and the clutch pedal rotation angle; obtaining an actual clutch pedal stroke curve, wherein the actual clutch pedal stroke curve is a curve of the clutch pedal stroke changing with time obtained according to the relationship function and the curve of the pedal distance difference changing with time. The clutch pedal stroke curve measurement method and device of the present invention solve the problem that the prior art cannot accurately obtain a curve of the clutch pedal stroke changing with time.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile stroke testing, and more specifically, relates to a clutch pedal stroke curve measuring method and device. Background Art

[0002] The prior art usually measures the curve of clutch pedal force changing with time to guide clutch pedal design, but has not yet accurately measured the curve of clutch pedal travel changing with time. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a clutch pedal stroke curve measurement method and device in view of the problem that the prior art cannot accurately obtain the curve of clutch pedal stroke changing with time.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0005] A clutch pedal stroke curve measurement method, comprising:

[0006] Obtaining a curve of a pedal distance difference of the clutch pedal changing over time, wherein the pedal distance difference is a difference between a current pedal distance of the clutch pedal and an initial pedal distance of the clutch pedal, wherein the initial pedal distance is a distance between a displacement sensor and an initial position of the clutch pedal, and the current pedal distance is a distance between a displacement sensor and a current position of the clutch pedal;

[0007] Obtaining a relationship function between the clutch pedal stroke and the pedal distance difference according to the initial pedal distance, the current pedal distance and the clutch pedal rotation angle;

[0008] An actual clutch pedal stroke curve is obtained, where the actual clutch pedal stroke curve is a curve of clutch pedal stroke changing with time obtained according to a curve of the relationship function and the pedal distance difference changing with time.

[0009] Furthermore, according to the initial pedal distance, the current pedal distance and the clutch pedal rotation angle, a relationship function between the clutch pedal stroke and the pedal distance difference is obtained, including:

[0010] Obtaining a relationship between an initial angle and the initial pedal distance, a clutch pedal radius, and a distance between a displacement sensor and a pedal shaft, wherein the initial angle is the angle between a line connecting the displacement sensor and the pedal shaft and a line connecting the pedal shaft and the initial position;

[0011] Obtaining a relationship between a first angle and the current pedal distance, a clutch pedal radius, and a distance between a displacement sensor and a pedal shaft, wherein the first angle is an angle between a line connecting the displacement sensor and the pedal shaft and a line connecting the pedal shaft and the current position;

[0012] Obtaining a relational expression between a second angle, the initial angle, and the first angle, wherein the second angle is the angle between a line connecting the initial position and the pedal shaft and a line connecting the pedal shaft and the current position;

[0013] The relationship between the clutch pedal stroke, the second angle, and the clutch pedal radius is obtained, so as to obtain a relationship function between the clutch pedal stroke and the pedal distance difference.

[0014] Furthermore, after obtaining the actual clutch pedal stroke curve, the method further includes obtaining a standard clutch pedal stroke curve according to the actual clutch pedal stroke curve, wherein obtaining the standard clutch pedal stroke curve according to the actual clutch pedal stroke includes:

[0015] Collect actual clutch pedal travel curves of multiple testers;

[0016] The actual clutch pedal travel curves of the multiple testers are fitted to obtain the standard clutch pedal travel curve.

[0017] Furthermore, fitting the actual clutch pedal travel curves of the multiple testers to obtain the standard clutch pedal travel curve includes:

[0018] The actual clutch pedal stroke curve is divided into a clutch-on section, a clutch-on continuous section, a clutch-off first section, a clutch-off semi-engagement section, and a clutch-off second section;

[0019] Linearizing the clutch-on segment, the clutch-on continuous segment, the clutch-off first segment, the clutch-off semi-engagement segment, and the clutch-off second segment of the actual clutch pedal travel curves of the multiple testers respectively;

[0020] The standard clutch pedal stroke curve includes a standard clutch-on segment, a standard clutch-on continuous segment, a standard clutch-off first segment, a standard clutch-off semi-clutch segment, and a standard clutch-off second segment.

[0021] Furthermore, after obtaining the standard clutch pedal stroke curve, the method further includes optimizing the design of the clutch operating mechanism according to the standard clutch pedal stroke curve. The optimizing the design of the clutch operating mechanism according to the standard clutch pedal stroke curve includes:

[0022] Obtain the curve of clutch pedal force changing with time;

[0023] According to the curve of the clutch pedal force changing with time and the standard clutch pedal stroke curve, a three-dimensional relationship diagram of the clutch pedal force and the clutch pedal stroke changing with time is obtained;

[0024] The moment of clutch disengagement and / or engagement is determined according to the three-dimensional relationship diagram.

[0025] Further, in determining the moment of clutch separation and / or engagement based on the three-dimensional relationship diagram, the first point of the clutch engagement section is determined as the moment when the clutch begins to separate, the second point of the clutch engagement section is determined as the moment when the clutch is completely separated, and the second point of the clutch engagement section is located after the first point of the clutch engagement section; the starting point of the clutch semi-engagement section is determined as the moment when the clutch begins to engage, and the first point of the second clutch release section is determined as the moment when the clutch is completely engaged.

[0026] Further, after determining the moment of clutch separation and / or engagement according to the three-dimensional relationship diagram, the method further includes:

[0027] The timing of engine torque control is determined according to the timing of the clutch being released and / or engaged.

[0028] Further, in determining the timing of engine torque control according to the timing of clutch disengagement and / or engagement, the engine torque input timing is determined to be at least after the clutch starts to engage, and the engine torque exit timing is determined to be at least before the clutch starts to engage.

[0029] Furthermore, after optimizing the design of the clutch operating mechanism, the method further comprises:

[0030] The actual clutch pedal stroke curve of the user is collected, and the actual clutch pedal stroke curve of the user is compared with the standard clutch pedal stroke curve. If a deviation occurs, the user is prompted to use the clutch pedal according to the standard clutch pedal stroke curve.

[0031] The present invention also provides a clutch pedal stroke curve testing device, comprising: a clutch pedal, a pedal shaft, a displacement sensor and a data calculation module, the data calculation module comprising a pedal distance difference calculation module and an actual clutch pedal stroke curve calculation module; the clutch pedal is connected to the pedal shaft, the displacement sensor is installed above the pedal shaft, and the data calculation module is connected to the displacement sensor line; the displacement sensor is used to obtain the pedal distance difference of the clutch pedal; the pedal distance difference calculation module is used to obtain a curve of the pedal distance difference of the clutch pedal changing with time; the actual clutch pedal stroke curve calculation module is used to obtain the actual clutch pedal stroke curve.

[0032] The beneficial effect brought by the present invention is that by combining the curve of the pedal distance difference changing with time with the relationship function, a curve of the clutch pedal stroke changing with time can be obtained. The actual clutch pedal stroke curve calculated according to the functional relationship and accurate clutch pedal stroke parameters has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a process of a clutch pedal travel curve measurement method in one embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of a clutch pedal travel curve measuring device in one embodiment of the present invention;

[0035] Figure 3 is a structural diagram of a data calculation module in one embodiment of the present invention;

[0036] Figure 4 is a curve showing the change of pedal distance difference over time in one embodiment of the present invention;

[0037] Figure 5 is an actual clutch pedal travel curve in one embodiment of the present invention;

[0038] Figure 6 It is a standard clutch pedal travel curve in one embodiment of the present invention.

[0039] The reference numerals in the drawings of the specification are as follows:

[0040] 1. Clutch pedal; 2. Pedal shaft; 3. Displacement sensor; 4. Data calculation module; 41. Pedal distance difference calculation module; 42. Actual clutch pedal travel curve calculation module; 5. The first point of the clutch pressing section; 6. The second point of the clutch pressing section; 7. The starting point of the clutch semi-clutch section; 8. The first point of the second section of the clutch release. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0042] The clutch pedal travel curve measurement method provided by the embodiment of the present invention is as follows: Figure 1 As shown, the following steps S10-S30 are included.

[0043] S10. Obtain a curve of the pedal distance difference of the clutch pedal 1 changing with time, where the pedal distance difference is the difference between the current pedal distance of the clutch pedal 1 and the initial pedal distance of the clutch pedal 1, the initial pedal distance is the distance between the displacement sensor 3 and the initial position of the clutch pedal 1, and the current pedal distance is the distance between the displacement sensor 3 and the current position of the clutch pedal 1.

[0044] Specifically, Figure 2 As shown, the displacement sensor 3 is installed above the pedal shaft 2, and the displacement sensor 3 and the pedal shaft 2 are in the same straight line. During the entire use process of the clutch pedal 1 being stepped on and released, the displacement sensor 3 can detect the pedal distance difference between the initial pedal distance when the clutch pedal 1 is in the initial position at the initial moment t0 and the current pedal distance when the clutch pedal 1 is in the current position at the next moment, i.e., the first moment t1. The initial pedal distance is the distance X0 between the displacement sensor 3 and the initial position of the clutch pedal 1, and the current pedal distance is the distance X1 between the displacement sensor 3 and the current position of the clutch pedal 1.

[0045] As the position of the clutch pedal 1 changes during the process of being depressed and released, the displacement sensor 3 can detect the pedal distance difference between the clutch pedal 1 and the displacement sensor 3 when the clutch pedal 1 is in different positions, and collect the pedal distance difference data between the clutch pedal 1 and the displacement sensor 3 when the clutch pedal 1 is in different positions through the data acquisition module.

[0046] like Figure 4 As shown, at the initial moment t0, the distance between the initial position of the clutch pedal 1 and the displacement sensor 3 is X0, and at the first moment t1, the distance between the current position of the clutch pedal 1 and the displacement sensor 3 is X1. The pedal distance difference ΔX=X1-X0 at the first moment t1 can be obtained through the displacement sensor 3, and the pedal distance difference ΔX of the clutch pedal 1 at any moment can be obtained accordingly, so that the data calculation module 4 draws a curve of the pedal distance difference changing with time.

[0047] S20, obtaining a relationship function between the clutch pedal stroke and the pedal distance difference according to the initial pedal distance, the current pedal distance and the rotation angle of the clutch pedal 1.

[0048] It can be understood that the calculation relationship between the clutch pedal stroke and the pedal distance difference is obtained by the calculation relationship between the initial pedal distance, the current pedal distance and the rotation angle of the clutch pedal 1, so as to obtain the relationship function between the clutch pedal stroke and the pedal distance difference. Since the actual motion trajectory of the clutch pedal 1 during use is obtained, the accurate clutch pedal stroke can be obtained, which provides data support for the subsequent fitting of an accurate actual clutch pedal stroke curve. From the relationship function between the clutch pedal stroke and the pedal distance difference, it can be seen that the functional relationship between the clutch pedal stroke and the pedal distance difference is approximately a linear function.

[0049] S30, obtaining an actual clutch pedal stroke curve, where the actual clutch pedal stroke curve is a curve obtained by calculating the change of the clutch pedal stroke over time based on the relationship function and the pedal distance difference over time.

[0050] Specifically, Figure 5 As shown, the curve of the pedal distance difference changing with time is combined with the relationship function to obtain the curve of the clutch pedal stroke changing with time. The actual clutch pedal stroke curve calculated based on the functional relationship and accurate clutch pedal stroke parameters has high accuracy.

[0051] Optionally, after step S30, that is, after obtaining the actual clutch pedal travel curve, the method further includes:

[0052] S40: Obtain a standard clutch pedal stroke curve according to the actual clutch pedal stroke.

[0053] Understandable, such as Figure 6 As shown, since the standard clutch pedal travel curve is a curve fitted by integrating the clutch pedal 1 habits of a large number of testers, it can be used to guide the optimal design of the clutch pedal 1, so that the design of the clutch pedal 1 can better reduce the frustration and abnormal noise during the use of the clutch pedal 1.

[0054] Optionally, after step S40, that is, after obtaining the standard clutch pedal travel curve, the method further includes:

[0055] S50. Optimize the design of the clutch operating mechanism according to the standard clutch pedal travel curve.

[0056] It is understandable that by collecting the habits of different testers in using the clutch pedal 1 and summarizing the standard clutch pedal travel curve that conforms to the habits of most people, reference and guidance can be provided for the design and development of the clutch operating mechanism.

[0057] Optionally, after step S50, that is, after optimizing the design of the clutch operating mechanism, the method further includes:

[0058] S60: Collect the user's actual clutch pedal stroke curve, compare the user's actual clutch pedal stroke curve with the standard clutch pedal stroke curve, and if there is a deviation, prompt the user to use clutch pedal 1 according to the standard clutch pedal stroke curve.

[0059] It is understandable that after the optimization design of the clutch pedal 1 is completed, the engagement and disengagement moments of the clutch of the car and the supply moment of the engine torque have been designed accordingly according to the standard clutch pedal travel curve. At this time, the engagement and disengagement moments of the clutch and the supply moment of the engine torque can reduce the jerking and abnormal noise during the use of the clutch pedal 1. When the user uses the clutch pedal 1 according to the standard clutch pedal travel curve, the design goal of reducing the jerking and abnormal noise during the use of the clutch pedal 1 can be maximized. If the user deviates from the standard clutch pedal travel curve when using the clutch pedal 1, the clutch pedal 1 is prone to jerking and abnormal noise during use.

[0060] By collecting the user's actual clutch pedal stroke curve and comparing the user's actual clutch pedal stroke curve with the standard clutch pedal stroke curve, if there is a deviation, the user is prompted to use clutch pedal 1 according to the standard clutch pedal stroke curve, which can maximize the design goal of reducing the jerking and abnormal noise during the use of clutch pedal 1 and improve the user's driving experience when using clutch pedal 1.

[0061] Specifically, the user is guided to use the clutch pedal 1 according to the standard clutch pedal stroke curve, namely, the standard clutch pressing section, the standard clutch pressing continuous section, the standard clutch releasing first section, the standard clutch semi-clutching section, and the standard clutch releasing second section. When the user uses clutch pedal 1, if the user does not press the clutch in the standard clutch pressing section, the user is prompted to press the clutch according to the standard clutch pressing section to reduce the shock and abnormal noise when using clutch pedal 1; if the user does not continuously press the clutch in the standard clutch pressing continuous section, the user is prompted to continuously press the clutch according to the standard clutch pressing continuous section to reduce the shock and abnormal noise when using clutch pedal 1; if the user does not release the clutch in the standard clutch release first section, the user is prompted to release the clutch according to the standard clutch release first section to reduce the shock and abnormal noise when using clutch pedal 1; if the user does not use the clutch in the standard clutch semi-clutching section, the user is prompted to use the clutch according to the standard clutch semi-clutching section to reduce the shock and abnormal noise when using clutch pedal 1; if the user does not release the clutch in the standard clutch release second section, the user is prompted to release the clutch according to the standard clutch release second section to reduce the shock and abnormal noise when using clutch pedal 1. By guiding the user to optimize the use habits of the clutch pedal 1 in a more targeted manner according to different stages of the use process of the clutch pedal 1 , the user can be further guided to reduce the frustration when using the clutch pedal 1 .

[0062] Optionally, step S20, i.e., obtaining a relationship function between the clutch pedal stroke and the pedal distance difference according to the initial pedal distance, the current pedal distance and the rotation angle of the clutch pedal 1, comprises:

[0063] S301, obtain the relationship between the initial angle and the initial pedal distance, the clutch pedal radius, and the distance between the displacement sensor 3 and the pedal shaft 2. The initial angle is the angle between the line connecting the displacement sensor 3 and the pedal shaft 2 and the line connecting the pedal shaft 2 and the initial position.

[0064] Specifically, the calculation relationship of the initial angle is obtained according to the initial pedal distance, the clutch pedal radius, and the distance between the displacement sensor 3 and the pedal shaft 2. The initial pedal distance is the distance between the displacement sensor 3 and the initial position of the clutch pedal 1, that is, the initial pedal distance is X0, and the clutch pedal radius is the distance between the pedal shaft 2 and the clutch pedal 1. Since the clutch pedal 1 moves in an arc with the pedal shaft 2 as the center, the distance between the pedal shaft 2 and the clutch pedal 1 is the radius R of the circular motion of the clutch pedal 1, that is, the clutch pedal radius is R. The line between the displacement sensor 3 and the pedal shaft 2 is a straight line, and the distance between the displacement sensor 3 and the pedal shaft 2 is a fixed value L. According to the initial pedal distance X0, the clutch pedal radius R, and the distance L between the displacement sensor 3 and the pedal shaft 2, the calculation relationship of the first angle α between the line connecting the displacement sensor 3 and the pedal shaft 2 and the line connecting the pedal shaft 2 and the initial position can be obtained as follows:

[0065]

[0066] S302, obtain the relationship between the first angle and the current pedal distance, the clutch pedal radius, and the distance between the displacement sensor 3 and the pedal shaft 2, where the first angle is the angle between the line connecting the displacement sensor 3 and the pedal shaft 2 and the line connecting the pedal shaft 2 and the current position.

[0067] Specifically, the calculation relationship of the first angle is obtained according to the current pedal distance, the clutch pedal radius, and the distance between the displacement sensor 3 and the pedal shaft 2. The current pedal distance is the distance between the displacement sensor 3 and the current position of the clutch pedal 1, that is, the current pedal distance is X1, and the clutch pedal radius is the distance between the pedal shaft 2 and the clutch pedal 1. Since the clutch pedal 1 moves in an arc with the pedal shaft 2 as the center, the distance between the pedal shaft 2 and the clutch pedal 1 is the radius R of the circular motion of the clutch pedal 1, that is, the clutch pedal radius is R. The line between the displacement sensor 3 and the pedal shaft 2 is a straight line, and the distance between the displacement sensor 3 and the pedal shaft 2 is a fixed value L. According to the current pedal distance X1, the clutch pedal radius R, and the distance L between the displacement sensor 3 and the pedal shaft 2, the calculation relationship of the second angle α+β between the line connecting the displacement sensor 3 and the pedal shaft 2 and the line connecting the pedal shaft 2 and the current position can be obtained as follows:

[0068]

[0069] S303, obtaining a relational expression between the second angle, the initial angle, and the first angle, wherein the second angle is the angle between a line connecting the initial position and the pedal shaft 2 and a line connecting the pedal shaft 2 and the current position.

[0070] The calculation formula for obtaining the second angle is obtained based on the initial angle and the first angle. Since the first angle is the sum of the initial angle and the second angle, the calculation formula for the second angle can be obtained by the difference between the first angle and the initial angle:

[0071]

[0072] S304, obtaining a relationship between the clutch pedal stroke, the second angle, and the clutch pedal radius, thereby obtaining a relationship function between the clutch pedal stroke and the pedal distance difference.

[0073] The calculation relationship of the clutch pedal stroke is obtained according to the second angle and the clutch pedal radius. Since the clutch pedal 1 moves in an arc with the pedal shaft 2 as the center, the clutch pedal stroke is the arc of the clutch pedal 1. A sector is formed between the pedal shaft 2, the initial position and the current position. According to the clutch pedal radius and the angle β of the sector, the length of the sector arc can be obtained, that is, the calculation relationship of the clutch pedal stroke is:

[0074]

[0075] The clutch pedal stroke calculated by the embodiment of the present invention is the actual movement trajectory of the clutch pedal 1 during use, so that an accurate clutch pedal stroke can be obtained, providing data support for the subsequent fitting of an accurate actual clutch pedal stroke curve.

[0076] Optionally, step S40, i.e., obtaining a standard clutch pedal travel curve according to the actual clutch pedal travel, includes:

[0077] S401 , collecting actual clutch pedal travel curves of multiple testers.

[0078] It is understandable that, due to human use, the same tester may have different times for pressing the clutch pedal 1 under different driving conditions, and different driving habits of different drivers may also cause differences in the time for pressing the clutch pedal 1. Therefore, it is necessary to unify the actual clutch pedal travel curves of multiple testers according to different driving conditions of the same driver and the driving habits of different drivers. In this embodiment, the actual clutch pedal travel curves of multiple testers are collected as the basis for fitting the standard pedal travel curve.

[0079] S402: Fitting actual clutch pedal travel curves of multiple testers to obtain a standard clutch pedal travel curve.

[0080] Specifically, based on the actual clutch pedal stroke curves of multiple testers obtained in the previous step, a statistical curve fitting method is used to fit the actual clutch pedal stroke curves of multiple testers into a standard clutch pedal stroke curve. The standard clutch pedal curve is derived from the actual clutch pedal stroke curves of different testers. The fitted standard clutch pedal stroke curve takes into account the clutch pedal 1 usage habits of different testers, and can reflect the average level of clutch pedal 1 usage habits, so that it can be used as a reference for the actual clutch pedal stroke curve.

[0081] Optionally, step S402, i.e. fitting actual clutch pedal travel curves of multiple testers to obtain a standard clutch pedal travel curve, includes:

[0082] S4021. Divide the actual clutch pedal travel curve into a clutch pressing section, a clutch pressing continuous section, a clutch releasing first section, a clutch semi-engagement section, and a clutch releasing second section.

[0083] Specifically, the entire clutch operation process is divided into different stages according to the clutch operation characteristics, so that the actual clutch pedal travel curve is divided into a clutch pressing section, a clutch pressing continuous section, a clutch releasing first section, a clutch semi-engagement section, and a clutch releasing second section. By dividing the actual clutch pedal travel curve into different stages, on the one hand, it is convenient to perform linear processing on each stage to improve data processing efficiency; on the other hand, it can also guide users to optimize the clutch pedal 1 usage habits in a more targeted manner according to different stages of the clutch pedal 1 usage process.

[0084] S4022, linearizing the clutch-on segment, the clutch-on continuous segment, the clutch-off first segment, the clutch-on semi-clutch segment, and the clutch-off second segment of actual clutch pedal travel curves of multiple testers respectively.

[0085] It can be understood that the actual clutch pedal travel curves of multiple testers, including the clutch pressing segment, the clutch pressing continuous segment, the clutch releasing first segment, the clutch semi-clutch segment, and the clutch releasing second segment, are linearized, and the time of each stage is summarized and counted, which can facilitate data statistics and analysis.

[0086] S4023, obtaining a standard clutch pedal stroke curve including a standard clutch pressing section, a standard clutch pressing continuous section, a standard clutch releasing first section, a standard clutch semi-engagement section, and a standard clutch releasing second section.

[0087] Understandably, by statistically analyzing the clutch pedal stroke curves of multiple testers, including the clutch pressing section, the clutch pressing continuous section, the clutch releasing first section, the clutch semi-clutching section, and the clutch releasing second section, a fitted standard clutch pedal stroke curve can be obtained.

[0088] Optionally, step S50, i.e. optimizing the clutch operating mechanism design according to the standard clutch pedal travel curve, includes:

[0089] S501. Obtain a curve showing clutch pedal force changing with time.

[0090] Specifically, a force sensor is installed on the clutch pedal 1 to detect a curve of the clutch pedal force changing with time during the use of the clutch pedal 1, so as to be used as an input for subsequent design optimization of the clutch pedal 1.

[0091] S502: Obtain a three-dimensional relationship diagram of clutch pedal force and clutch pedal travel versus time according to a curve of clutch pedal force versus time and a standard clutch pedal travel curve.

[0092] Specifically, the curve of clutch pedal force changing with time obtained in step S501 is combined with the standard clutch pedal stroke curve obtained in step S602 to obtain the mathematical relationship between clutch pedal force, clutch pedal stroke and time. The relationship between clutch pedal force, clutch pedal stroke and time is represented by a diagram, and a three-dimensional relationship diagram of clutch pedal force and clutch pedal stroke changing with time is drawn. Since the standard clutch pedal stroke curve is a curve fitted by integrating the clutch pedal 1 habits of a large number of testers, it can be used to guide the optimal design of clutch pedal 1, so that the design of clutch pedal 1 can better reduce the setbacks and abnormal noises during the use of clutch pedal 1.

[0093] S503: Determine the moment of clutch disengagement and / or engagement according to the three-dimensional relationship diagram.

[0094] Specifically, in determining the moment when the clutch is separated and / or engaged, the first point 5 of the clutch pressing section is determined as the moment when the clutch begins to separate, the second point 6 of the clutch pressing section is determined as the moment when the clutch is completely separated, and the second point 6 of the clutch pressing section is located after the first point 5 of the clutch pressing section; the starting point 7 of the clutch semi-clutch section is determined as the moment when the clutch begins to engage, and the first point 8 of the second section of the clutch release is determined as the moment when the clutch is completely engaged.

[0095] The first point 5 of the clutch pressing section is located after the starting point of the clutch pressing section, the second point 6 of the clutch pressing section is located after the first point 5 of the clutch pressing section and in the middle of the clutch pressing section curve, the starting point 7 of the clutch semi-engagement section is located at the moment when the clutch starts to engage, and the first point 8 of the second section of the clutch release is located in the middle of the second section of the clutch release curve. By designing the first point 5 of the clutch pressing section as the moment when the clutch starts to disengage, the second point 6 of the clutch pressing section as the moment when the clutch is completely separated, the starting point 7 of the clutch semi-engagement section as the moment when the clutch starts to engage, and the first point 8 of the second section of the clutch release is the moment when the clutch is completely engaged, it can meet the actual use scenario of the clutch and make the optimized design of the clutch closer to user needs.

[0096] Optionally, after step S503, that is, after determining the moment of clutch disengagement and / or engagement according to the three-dimensional relationship diagram, the following further includes:

[0097] S504: Determine the timing of engine torque control according to the timing of clutch disengagement and / or engagement.

[0098] Specifically, in determining the timing of engine torque control, the engine torque input timing is determined to be at least after the clutch starts to engage, and the engine torque exit timing is determined to be at least before the clutch starts to engage. By setting the engine torque input timing to be at least after the clutch starts to engage, and the engine torque exit timing to be at least before the clutch starts to engage, it is possible to avoid the engine torque input and exit timing being too early or too late, which affects the engine performance and causes problems such as setbacks and abnormal noises.

[0099] The embodiment of the present invention also provides a clutch pedal travel curve testing device, such as Figure 2 and Figure 3As shown, it includes: a clutch pedal 1, a pedal shaft 2, a displacement sensor 3 and a data calculation module 4, the data calculation module 4 includes a pedal distance difference calculation module 41 and an actual clutch pedal stroke curve calculation module 42; the clutch pedal 1 is connected to the pedal shaft 2, the displacement sensor 3 is installed above the pedal shaft 2, and the data calculation module 4 is connected to the displacement sensor 3 by wire; the displacement sensor 3 is used to obtain the pedal distance difference of the clutch pedal 1; the pedal distance difference calculation module 41 is used to obtain a curve of the pedal distance difference of the clutch pedal 1 changing with time; the actual clutch pedal stroke curve calculation module 42 is used to obtain the actual clutch pedal stroke curve.

[0100] By installing the displacement sensor 3 above the pedal shaft 2, the displacement sensor 3 can obtain the difference between the initial pedal distance of the clutch pedal 1 and the current pedal distance of the clutch pedal 1, which can be used as the input of the pedal distance difference calculation module 41 to obtain the curve of the pedal distance difference of the clutch pedal 1 changing with time; the relationship function calculation module can obtain the relationship function between the clutch pedal stroke and the pedal distance difference, which can be used as the input of the actual clutch pedal stroke curve calculation module 42 to obtain the actual clutch pedal stroke curve, thereby obtaining an accurate actual clutch pedal stroke curve, which can be used for subsequent guidance on the optimal design of the clutch pedal 1 and guiding the user's habit of using the clutch pedal 1.

[0101] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through computer-readable instructions, and the computer-readable instructions can be stored in a non-volatile readable storage medium or a volatile readable storage medium. When the computer-readable instructions are executed, they may include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0102] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A clutch pedal travel curve measurement method, characterized in that: include: Obtaining a curve of a pedal distance difference of the clutch pedal changing over time, wherein the pedal distance difference is a difference between a current pedal distance of the clutch pedal and an initial pedal distance of the clutch pedal, wherein the initial pedal distance is a distance between a displacement sensor and an initial position of the clutch pedal, and the current pedal distance is a distance between a displacement sensor and a current position of the clutch pedal; Obtaining a relationship function between the clutch pedal stroke and the pedal distance difference according to the initial pedal distance, the current pedal distance and the clutch pedal rotation angle; Acquire an actual clutch pedal stroke curve, wherein the actual clutch pedal stroke curve is a curve of clutch pedal stroke variation over time obtained according to a curve of the relationship function and the pedal distance difference variation over time; divide the actual clutch pedal stroke curve into a clutch pressing section, a clutch pressing continuous section, a clutch releasing first section, a clutch semi-engagement section, and a clutch releasing second section; Acquiring a standard clutch pedal stroke curve according to the actual clutch pedal stroke curve; Optimize the clutch operating mechanism design according to the standard clutch pedal travel curve, including: Obtain the curve of clutch pedal force changing with time; According to the curve of the clutch pedal force changing with time and the standard clutch pedal stroke curve, a three-dimensional relationship diagram of the clutch pedal force and the clutch pedal stroke changing with time is obtained; According to the three-dimensional relationship diagram, the moment of clutch separation and / or engagement is determined, the first point of the clutch engagement section is determined as the moment when the clutch begins to separate, the second point of the clutch engagement section is determined as the moment when the clutch is completely separated, and the second point of the clutch engagement section is located after the first point of the clutch engagement section; the starting point of the clutch semi-clutch section is determined as the moment when the clutch begins to engage, and the first point of the second clutch release section is determined as the moment when the clutch is completely engaged.

2. The clutch pedal travel curve measurement method according to claim 1, characterized in that: According to the initial pedal distance, the current pedal distance and the clutch pedal rotation angle, a relationship function between the clutch pedal stroke and the pedal distance difference is obtained, including: Obtaining a relationship between an initial angle and the initial pedal distance, a clutch pedal radius, and a distance between a displacement sensor and a pedal shaft, wherein the initial angle is the angle between a line connecting the displacement sensor and the pedal shaft and a line connecting the pedal shaft and the initial position; Obtaining a relationship between a first angle and the current pedal distance, a clutch pedal radius, and a distance between a displacement sensor and a pedal shaft, wherein the first angle is an angle between a line connecting the displacement sensor and the pedal shaft and a line connecting the pedal shaft and the current position; Obtaining a relational expression between a second angle, the initial angle, and the first angle, wherein the second angle is the angle between a line connecting the initial position and the pedal shaft and a line connecting the pedal shaft and the current position; The relationship between the clutch pedal stroke, the second angle, and the clutch pedal radius is obtained, so as to obtain a relationship function between the clutch pedal stroke and the pedal distance difference.

3. The clutch pedal travel curve measurement method according to claim 1, characterized in that: The step of acquiring a standard clutch pedal stroke curve according to the actual clutch pedal stroke curve comprises: collecting the actual clutch pedal travel curves of a plurality of testers; The actual clutch pedal travel curves of the multiple testers are fitted to obtain the standard clutch pedal travel curve.

4. The clutch pedal travel curve measurement method according to claim 3, characterized in that: The fitting of the actual clutch pedal travel curves of the plurality of testers to obtain the standard clutch pedal travel curve comprises: Linearizing the clutch-on segment, the clutch-on continuous segment, the clutch-off first segment, the clutch-off semi-engagement segment, and the clutch-off second segment of the actual clutch pedal travel curves of the multiple testers respectively; The standard clutch pedal stroke curve includes a standard clutch-on segment, a standard clutch-on continuous segment, a standard clutch-off first segment, a standard clutch-off semi-clutch segment, and a standard clutch-off second segment.

5. The clutch pedal travel curve measurement method according to claim 1, characterized in that: After determining the moment of clutch separation and / or engagement according to the three-dimensional relationship diagram, the method further comprises: The timing of engine torque control is determined according to the timing of the clutch being released and / or engaged.

6. The clutch pedal travel curve measurement method according to claim 5, characterized in that: In determining the timing of engine torque control according to the timing of clutch disengagement and / or engagement, it is determined that the engine torque input timing is at least after the clutch starts to engage, and the engine torque exit timing is at least before the clutch starts to engage.

7. The clutch pedal travel curve measurement method according to claim 1, characterized in that: After optimizing the clutch operating mechanism design, the invention also includes: The actual clutch pedal stroke curve of the user is collected, and the actual clutch pedal stroke curve of the user is compared with the standard clutch pedal stroke curve. If a deviation occurs, the user is prompted to use the clutch pedal according to the standard clutch pedal stroke curve.

8. A clutch pedal travel curve testing device according to the measuring method of claim 1, characterized in that: include: A clutch pedal, a pedal shaft, a displacement sensor and a data calculation module, wherein the data calculation module includes a pedal distance difference calculation module and an actual clutch pedal travel curve calculation module; The clutch pedal is connected to the pedal shaft, the displacement sensor is installed above the pedal shaft, and the data calculation module is connected to the displacement sensor line; The displacement sensor is used to obtain the pedal distance difference of the clutch pedal; The pedal distance difference calculation module is used to obtain a curve showing the change of the pedal distance difference of the clutch pedal over time; The actual clutch pedal stroke curve calculation module is used to obtain the actual clutch pedal stroke curve; the actual clutch pedal stroke curve is divided into a clutch pressing section, a clutch pressing continuous section, a clutch releasing first section, a clutch semi-clutch section, and a clutch releasing second section; the clutch pedal stroke curve test device can also be used for: Acquiring a standard clutch pedal stroke curve according to the actual clutch pedal stroke curve; Optimize the clutch operating mechanism design according to the standard clutch pedal travel curve, including: Obtain the curve of clutch pedal force changing with time; According to the curve of the clutch pedal force changing with time and the standard clutch pedal stroke curve, a three-dimensional relationship diagram of the clutch pedal force and the clutch pedal stroke changing with time is obtained; According to the three-dimensional relationship diagram, the moment of clutch separation and / or engagement is determined, the first point of the clutch engagement section is determined as the moment when the clutch begins to separate, the second point of the clutch engagement section is determined as the moment when the clutch is completely separated, and the second point of the clutch engagement section is located after the first point of the clutch engagement section; the starting point of the clutch semi-clutch section is determined as the moment when the clutch begins to engage, and the first point of the second clutch release section is determined as the moment when the clutch is completely engaged.

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