JPH06102146A - Method for shift feeling evaluation - Google Patents

Abstract

PURPOSE:To judge operating physical force with the timing when a man operates a control lever and moreover to quantitatively judge a shift feeling correctly even by the difference in operating speed in this time. CONSTITUTION:An input side motor 18 is installed in an input shaft 14 of a manual transmission 12, and an output side motor 22 is installed in an output shaft 20 thereof. The motor 22 is driven in time of a speed change, and the motor 18 is put in a not driven state. A strain gage 44 is installed in a shift lever 24, and the operating physical force of the lever 24 is found. The input rotating speed Ni and the output rotating speed Nr are detected with a first tachometer 46 provided to an input shaft 14 and a second tachometer 48 provided to an output shaft 20, respectively. The rotation ratio Ni/Nr is operated in real time in a speed change, and the synchronizing time T is found by a period when the rotation ratio is changed. Each threshold of the operating physical force is set according to the length of the synchronizing time T. A shift feeling is judged from a relation of the threshold and the operating physical force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift feeling evaluation method for quantitatively evaluating a shift feeling by a shift operation force when a manual transmission is gear-shifted via a control lever.

[0002]

2. Description of the Related Art Conventionally, a manual transmission mounted on a vehicle is operated by selecting and shifting a change lever provided on a steering column or a control lever such as a shift lever standing upright from the floor. It has become. In particular, the shift operation is an operation in which the gears are meshed with each other through the frictional force of the synchronizer incorporated in the transmission gear train, so the operation force at this time is increased and the shift feeling of the manual transmission is determined. It

Therefore, in such a manual transmission, the specifications of each component constituting the synchronizing device are set so that a good shift feeling can be obtained at the time of development, and the shift is performed in the final process of the production line. Feeling is checked. However, if all of the shift feeling checks rely on a sensory test by an operator, there is a possibility that individual differences will occur. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 63-249036 (G01M17), the applicant of the present invention has proposed an evaluation device capable of evaluating the shift feeling uniformly and quantitatively.

That is, the shift feeling evaluating device is provided with a driving means for rotationally driving the input shaft of the manual transmission, a load sensor and a stroke sensor are attached to the shift lever, and further, the input shaft side of the transmission is rotated. A torque sensor is attached to the sensor and the output shaft side to be roughly configured. Then, the load acting on the shift lever when shifting is performed while the drive means is driven is
The shift feeling is quantitatively determined by calculating the rotational speed and the output torque together with the calculating means.

[0005]

However, in such a conventional shift feeling evaluation method, an operating actuator is attached to operate the shift lever, and the operating actuator shifts at a preset operating speed. The lever is designed to be operated. Therefore, it is difficult for a person to judge the shift operation force by incorporating the feeling when a person actually operates the shift lever, and it becomes difficult to evaluate the correct shift feeling, and the operation actuator is provided. In addition, there is a problem that the structure becomes complicated, the device becomes large in size, and the cost is significantly increased.

In view of such conventional problems, the present invention determines the operating force at the timing when a person operates the control lever, and moreover, the shift feeling can be accurately provided by the difference in the operating speed at this time. It is an object of the present invention to provide a shift feeling evaluation method capable of making a quantitative determination.

[0007]

To achieve the above object, the present invention provides a first drive means for inputting a rotational force to an input shaft of a manual transmission and a rotational force to an output shaft of a manual transmission. A shift feeling evaluation method comprising: a second driving means, wherein the second driving means is in a driving state and the first driving means is in a non-driving state, and a shift feeling is judged by an operation force when shifting the control lever. Detects the synchronization time when the manual transmission is shifted by operating the control lever, sets the threshold of the operating force according to the length of this synchronization time, and shifts according to the relationship between this threshold and the operating force. Judge the feeling.

In order to achieve such an object, the present invention provides first driving means for inputting a rotational force to an input shaft of a manual transmission and second driving means for inputting a rotational force to an output shaft of the manual transmission. In the shift feeling evaluation method for determining the shift feeling by the operation force when shifting the control lever with the second driving means in the driven state and the first driving means in the non-driving state, An input side rotation detecting means for detecting the rotation speed and an output side rotation detecting means for detecting the rotation speed of the output shaft are provided, and a rotation ratio between the input shaft and the output shaft is obtained in real time from these input and output side rotation detecting means. The period in which this rotation ratio is changed is determined as the synchronization time.

Further, in order to achieve such an object, the present invention provides first driving means for inputting a rotational force to an input shaft of a manual transmission and second driving means for inputting a rotational force to an output shaft of the manual transmission. In the shift feeling evaluation method for determining the shift feeling by the operation force when shifting the control lever with the second driving means in the driven state and the first driving means in the non-driving state, An input side rotation detecting means for detecting the rotation speed and an output side rotation detecting means for detecting the rotation speed of the output shaft are provided, and a rotation ratio between the input shaft and the output shaft is obtained in real time from these input and output side rotation detecting means. The synchronization time is calculated from the period in which the rotation ratio is changed, the threshold value of the operating force is set according to the length of the synchronization time, and the shift feeling is judged based on the relationship between the threshold value and the operating force. That.

[0010]

As described above, in the shift feeling evaluation method of the present invention, the threshold value of the operating force is set in accordance with the length of the synchronizing time when the manual transmission is shifted, and this threshold is set. Since the shift feeling is determined based on the relationship between the value and the operating force, even if a person directly operates the shift lever to shift gears, the shift feeling can be accurately determined according to the operating speed. Therefore, the shift feeling can be evaluated with an actual shift feeling. Further, even when the operation speeds are different due to the difference in operation feeling of each person, the shift feeling can be accurately determined by the threshold value.

Further, in obtaining the synchronization time,
By determining the rotation ratio between the input shaft and the output shaft in real time from the input side rotation detecting means and the output side rotation detecting means, and determining the period when this rotation ratio is changed as the synchronization time, the substantial synchronization time is determined. In addition to being easily obtained, even if a rotation variation occurs on the input side, an accurate synchronization time can be obtained regardless of this variation.

Further, the synchronizing time is obtained from the period in which the rotation ratio of the input shaft and the output shaft obtained from the input / output side rotation detecting means is changed, and the operating force is calculated according to the length of the synchronizing time. By setting a threshold value and determining the shift feeling based on the relationship between the threshold value and the operating force, the shift feeling for each operating speed can be accurately evaluated with a more accurate synchronization time.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a shift feeling evaluation method according to the present invention, FIG. 1 is an overall schematic configuration diagram of a shift feeling evaluation apparatus 10 for executing the method of the present embodiment, and FIG. Cross-sectional view of the synchronizer, FIG.
FIG. 4 is a characteristic diagram showing changes in the number of rotations of the input and output shafts for obtaining the synchronization time, and FIG.

That is, the shift feeling evaluation apparatus 10 used in the shift feeling evaluation method of this embodiment is
As shown in FIG. 1, the input side motor 18 as the first drive means attached to the input shaft 14 of the manual transmission 12 via the clutch 16 and the second side attached to the output shaft 20.
An output side motor 22 as a drive means is included in the configuration. Then, by driving the output side motor 18, the rotational driving force is transmitted via the clutch 16 to the manual transmission 12
The input rotation is output to the output side motor 22 in a gear mesh state. At this time, the output side motor 22 is in a non-driving state and a predetermined rotational load is applied to the output shaft 20.
To give to. On the other hand, when shifting, the output side motor 22 is driven to input the rotational force to the output shaft 20, and in this state, the input side motor 22 is in the non-driving state.

The manual transmission 12 is provided with a shift lever 24 as a control lever, and the shift operation of the shift lever 24 allows the manual transmission 12 to be shifted through the synchronizer 26 shown in FIG. Done. That is, in the synchronizing device 26, the sleeve 32 is spline-fitted to the outer periphery of the hub 30 attached to the shaft 28, and the sleeve 32 is fitted to the shift lever 24.
It moves in the same direction via a shift fork (not shown) that moves in the axial direction when the shift operation is performed. Hub 30 and sleeve 3
Keys 34 are arranged at an appropriate interval in the circumferential direction between the keys 2 and 2, and the keys 34 move with the movement of the sleeve 32 to press the synchronizing ring 36. Due to this pressing, the synchronizing ring 36 is pressed against the cone surface 40 integrally extended from the transmission gear 38, and the initial frictional force at this time causes the rotational synchronization between the transmission gear 38 and the shaft 28 to some extent. Then, when the rotation synchronization is performed to some extent, the spline chamfer 32a of the sleeve 32 faces the spline chamfer 36a of the synchronization ring 36, and the sleeve 32 directly presses the synchronization ring 36 to cause a large friction on the cone surface 40. When the force is generated and the synchronization is completed, the sleeve 32 further moves and meshes with the clutch gear 42 integrated with the transmission gear 38, and the switching of the transmission gears is completed.

Therefore, during shifting of the manual transmission 12, the load for pushing the synchronizing ring 36 through the key 34 to perform the synchronizing action, and the spline chamfer 32a of the sleeve 32 and the spline chamfer of the synchronizing ring 36. The load when pressing the synchronizing ring 36 acts on the shift lever 24 in a state where they are opposed to 36a, and these loads are mainly required as the shift operation force.

In order to obtain the shift operation force, in this embodiment, a strain gauge 44 is attached to the shift lever 24 as shown in FIG.
The operating force is obtained from the amount of flexure of the shift lever 24 determined by.

Here, in the present embodiment, the input shaft 1
4 is provided with a first tachometer 46 as an input side rotation detecting means, and the output shaft 20 is provided with a second tachometer 48 as an output side detecting means. Then, the first and second tachometers 4
The input side rotation speed signal and the output side rotation speed signal detected by 6 and 48 are output to the personal computer 52 through the waveform analyzer 50 together with the operation force signal of the strain gauge 44.

In the personal computer 52, the input rotation speed Ni and the output rotation speed N detected by the first and second tachometers 46 and 48.
The rotation ratio (Ni / Nr) with r is calculated in real time (for example, every 1/100 sec) at the time of shifting, and the timing of the synchronization start and the synchronization end is obtained from the change of the rotation ratio, and the synchronization time T is determined from this It is like this. When the manual transmission 12 shifts, the output shaft 20 is connected to the drive wheels and is always rotated so that the output shaft 20 serves as a synchronizing part. The input shaft 14 of the output shaft 20 is disengaged when the clutch 16 is disengaged. Since it is the side that is synchronized with the rotation, it is the synchronized part.

That is, FIG. 3 shows the change in the number of revolutions at the time of downshifting from the third speed to the second gear. While the output number of revolutions Nr is substantially constant, the input number of revolutions Ni is the number of revolutions Ni3 at the third speed. Is increased from the second speed to the revolution speed Ni2. That is, in the third speed state shown in the figure, the rotation speed ratio is constant at Ni3 / Nr, but during the shift, this rotation speed ratio is gradually changed to 2
It becomes constant when the rotation speed ratio reaches Ni2 / Nr at the time when the speed change is completed. Therefore, the rotation speed ratio is Ni3 / Nr.
Can be determined as the synchronization start time, and the rotation speed ratio switched to Ni2 / Nr can be determined as the synchronization end time. The required time T from the start of synchronization to the end of synchronization is the synchronization time, and the operating force is determined based on this synchronization time T.

Table 1 below shows the threshold value of the operating force with respect to the synchronization time T, and the shift feeling is judged (evaluated) based on this threshold value.

[0022]

[Table 1] That is, the threshold values shown in Table 1 are such that the synchronization time T is 0.0
When it is in the range of 5 to 0.10, the operating force is 150 to 20.
The range of 0 (N) is appropriate, and the synchronization time T is 0.11 to 0.11.
When it is in the range of 0.15, the operating force is 100 to 150.
The range of (N) is proper, and the synchronization time T is 0.16.
When it is in the range of .about.0.20, the operating force is set to be appropriate in the range of 80 to 130.

Therefore, as shown by the solid line in FIG. 4, when the peak value P of the operating force varied within the range of the shift time T is between the preset upper and lower limits of the operating force, the shift fee is changed. Judge that the ring is correct. On the other hand, when the peak value P of the operating force does not fall between the upper limit and the lower limit as indicated by the one-dot chain line in the figure, it is determined that the shift feeling is unsuitable. That is, when the peak value P exceeds the upper limit value of the operating force, the operating force is too large, and when the peak value P is below the lower limit value of the operating force, the operating force is insufficient. I can't get a good shift feeling. Incidentally, as shown in the figure, the operation load of the two-step motion Q and R when it hits the shift stopper generated after the end of the synchronization is excluded from the shift feeling judgment target.

In this embodiment, the case where the operating force is obtained by using the strain gauge 44 is disclosed, but this operating force correlates with the fluctuation amount of the shaft torque appearing on the output shaft 20 or the input shaft 14. It has been confirmed by the inventor of the present application that there is such a problem, and the operating force may be obtained from the variation amount of the shaft torque.

As described above, in the shift feeling evaluation method of this embodiment, when the manual transmission 12 is shifted, the rotation ratio N between the input side rotation speed Ni and the output side rotation speed Nr.
While the synchronization time T is obtained from the change of i / Nr, the threshold value of the operating force is determined according to the length of the synchronization time T, that is, the operating speed, and the shift force is determined by the relationship between the threshold value and the operating force. Since the ring is determined, when the operator of the inspection having the different operation feeling directly operates the shift lever 24 to shift gears, the shift feeling can be accurately determined regardless of the operation speed.

Further, in the present embodiment, the synchronization time T is judged by the change of the rotation ratio Ni / Nr, and by observing the rotation ratio between the output side and the input side in this way, the output side Even when the motor 22 is changed, the synchronization timing can be accurately taken. Output side motor 2
Assuming that there is no rotation fluctuation of 2, it is also possible to calculate this from the number of revolutions Ni of the synchronized part to obtain the acceleration, and to obtain the synchronization time T from the change in this acceleration.

[0027]

As described above, according to the first aspect of the present invention.
In the shift feeling evaluation method shown in, the operating force thresholds are set according to the length of the synchronization time when the manual transmission is shifted, and the relationship between this threshold and the operating force is set. Since I decided to judge the shift feeling with,
Since the shift feeling can be properly judged according to the difference in the operation speed, the inspection operator can directly operate the shift lever to shift gears, and the shift feeling can be judged in a state closer to the actual shift feeling. be able to. In addition, since the operator operates the shift lever in this way, means for mechanically operating the shift lever is not required, and the structure of the device can be simplified and the inspection cost can be reduced accordingly. it can.

According to a second aspect of the present invention, the rotation ratio between the input shaft and the output shaft is obtained in real time from the input side rotation detecting means and the output side rotation detecting means, and this rotation ratio is changed. Since the period is determined as the synchronization time, the substantial synchronization time can be easily obtained, and even if the driving force has a rotation fluctuation, the accurate synchronization time can be calculated regardless of this fluctuation. .

Further, according to claim 3 of the present invention,
The synchronization time is obtained from the period in which the rotation ratio between the input shaft and the output shaft obtained from the output side rotation detection means is changed, and the threshold value of the operating force is set according to the length of this synchronization time. Since the shift feeling is judged from the relationship between the threshold value and the operating force, it is possible to obtain the synchronization feeling more accurately, and it is possible to evaluate the shift feeling more accurately. Play.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram showing an embodiment of an apparatus for executing an evaluation method of the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a synchronizing device for a manual transmission to which the evaluation method of the present invention is applied.

FIG. 3 is a characteristic diagram showing changes in the number of rotations of the input and output shafts for obtaining a synchronization time in the evaluation method of the present invention.

FIG. 4 is a characteristic diagram showing a change in operating force of a shift lever for determining a shift feeling in the evaluation method of the present invention.

[Explanation of symbols]

 10 shift feeling evaluation device 12 manual transmission 14 input shaft 18 input side motor (first driving means) 20 output shaft 22 output side motor (second driving means) 24 shift lever (control lever) 24 synchronizer 46 first rotation Meter (input side rotation detecting means) 48 Second tachometer (output side rotation detecting means) 50 Waveform analyzer 52 Personal computer

Claims (3)

[Claims] 1. A first drive means for inputting a rotational force to an input shaft of a manual transmission, and a second drive means for inputting a rotational force to an output shaft of a manual transmission, wherein the second drive means is in a driven state. In the shift feeling evaluation method for determining the shift feeling by the operation force when shifting the control lever with the first driving means in the non-driving state, the synchronization time when shifting the manual transmission by the control lever operation is described. A shift feeling evaluation method characterized by detecting, setting a threshold value of the operating force in accordance with the length of the synchronization time, and determining a shift feeling based on the relationship between the threshold value and the operating force. . 2. A first drive means for inputting a rotational force to an input shaft of a manual transmission, and a second drive means for inputting a rotational force to an output shaft of the manual transmission, wherein the second drive means is in a driving state. In a shift feeling evaluating method for judging a shift feeling by an operation force when shifting the control lever with the first driving means in a non-driving state, an input side rotation detecting means for detecting a rotation speed of an input shaft, and an output An output side rotation detecting means for detecting the number of rotations of the shaft is provided, the rotation ratio between the input shaft and the output shaft is obtained in real time from these input and output side rotation detecting means, and a period during which the rotation ratio is changed is set as a synchronization time. A shift feeling evaluation method characterized by determining as 3. A first drive means for inputting a rotational force to the input shaft of the manual transmission, and a second drive means for inputting a rotational force to the output shaft of the manual transmission, wherein the second drive means is in a driven state. In a shift feeling evaluating method for judging a shift feeling by an operation force when shifting the control lever with the first driving means in a non-driving state, an input side rotation detecting means for detecting a rotation speed of an input shaft, and an output An output side rotation detecting means for detecting the number of rotations of the shaft is provided, a rotation ratio between the input shaft and the output shaft is obtained in real time from the input and output side rotation detecting means, and a synchronization time is calculated from a period when the rotation ratio is changed. The shift feeling evaluation is characterized in that the threshold value of the operating force is set according to the length of this synchronization time, and the shift feeling is judged based on the relationship between the threshold value and the operating force. Method.