Tooth shaking control method of friction-ring-free synchronizer and related product

Abstract

The invention discloses a tooth shaking control method of a friction-ring-free synchronizer and related products, which can be applied to the technical field of hybrid electric vehicle gearboxes, and the method comprises the following steps: acquiring a current working condition signal and a gear shifting signal of a vehicle; when the current working condition signal shows that the vehicle is static, synchronous force is applied to a synchronous gear sleeve of a synchronizer without a friction ring based on the gear shifting signal; when the tooth abutting phenomenon occurs between the synchronous gear sleeve and the gear teeth of the to-be-driven gear, a driving motor is controlled to apply synchronous force to the synchronous gear sleeve and provide rotating torque for the synchronous gear sleeve at the same time; and on the basis of the synchronous force and the rotating torque, the synchronous gear sleeve is controlled to be meshed with the gear teeth, and tooth shaking of the synchronizer is achieved. Therefore, when the vehicle is static and the tooth top phenomenon occurs, the synchronous force and the rotating torque are provided for the synchronous gear sleeve at the same time, so that the gear shifting success rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle gearboxes, and in particular to a tooth-shaking control method for a frictionless ring synchronizer and related products. Background Art

[0002] When the vehicle is stationary, the synchronizer gear shifting is usually used to determine the synchronizer travel and the end point position after the gear shifting, etc. When the vehicle is stationary, the gear shifting is more likely to cause the top gear phenomenon.

[0003] In the prior art, when a hybrid system with a clutch and synchronizer shifting has a tooth-pushing phenomenon, the synchronizer position is generally moved to neutral, the engine is idling, the clutch torque is controlled, the clutch is slightly closed to drive the input gear shaft to rotate, the clutch is opened, and after the clutch is opened, the synchronizer is re-controlled to shift, and only the synchronization force is used to eliminate the tooth-pushing phenomenon. However, in order to reduce costs, clutches are gradually eliminated. For hybrid systems with only synchronizer shifting, the above steps cannot be used to eliminate the tooth-pushing phenomenon, that is, the success rate of shifting cannot be guaranteed by the synchronization force alone.

[0004] Therefore, how to improve the success rate of shifting gears when a hybrid vehicle is stationary is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0005] Based on the above problems, the present application provides a tooth shaking control method and related products of a frictionless ring synchronizer. When the vehicle is stationary and tooth topping occurs, the synchronous gear sleeve is provided with synchronization force and rotational torque at the same time, thereby solving the problem that the success rate of gear shifting cannot be guaranteed by synchronization force alone.

[0006] In a first aspect, the present application provides a tooth shaking control method of a frictionless ring synchronizer, characterized in that the method comprises:

[0007] Obtain the vehicle's current operating condition signal and gear shift signal;

[0008] When the current operating condition signal indicates that the vehicle is stationary, applying a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal;

[0009] When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve at the same time;

[0010] Based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to engage with the gear teeth to achieve the tooth jitter of the synchronizer.

[0011] Optionally, when the synchronous gear sleeve and the gear teeth of the gear to be entered are in contact with each other, based on the position of the synchronous gear sleeve and the gear teeth, controlling the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve also includes:

[0012] Determining a moving distance of the synchronous gear sleeve based on a sensor;

[0013] When the moving distance is less than or equal to a first preset distance, it is determined that a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear;

[0014] When the moving distance is greater than the first preset distance, it is determined that no tooth collision occurs between the synchronous gear sleeve and the gear gear.

[0015] Optionally, when the synchronous gear sleeve and the gear teeth of the gear to be entered are in contact with each other, controlling the driving motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve comprises:

[0016] When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to provide the synchronous gear sleeve with a rotation torque changing from a positive direction to a reverse direction while applying a synchronization force to the synchronous gear sleeve.

[0017] Optionally, before controlling the synchronization sleeve to mesh with the gear teeth based on the synchronization force and the rotational torque to achieve the gear shaking of the synchronizer, the method further includes:

[0018] When the synchronizer has a tendency to shift into a gear and the current rotational torque is in a positive direction, determining that the position of the synchronizer sleeve and the gear tooth is a first position, and recording the current rotational torque as the first rotational torque;

[0019] When the synchronizer has a tendency to shift into a gear, and the current rotational torque is in the reverse direction, the position of the synchronizer sleeve and the gear tooth is determined to be a second position, and the current rotational torque is recorded as the second rotational torque.

[0020] Optionally, controlling the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the rotational torque to achieve the tooth jitter of the synchronizer includes:

[0021] When the position of the synchronous gear sleeve and the gear gear is the first position, the magnitude of the first rotation torque is adjusted to obtain a first meshing torque;

[0022] Based on the synchronization force and the first meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0023] Optionally, controlling the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the rotational torque to achieve the tooth jitter of the synchronizer includes:

[0024] When the position of the synchronous gear sleeve and the gear gear is the second position, the magnitude of the second rotational torque is adjusted to obtain a second meshing torque;

[0025] Based on the synchronization force and the second meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0026] Optionally, the method further includes:

[0027] When the position of the synchronous gear sleeve and the gear gear is in a first position, determining the moving distance of the synchronous gear sleeve based on a sensor;

[0028] When the moving distance is equal to the second preset distance, it is determined that the synchronous gear sleeve and the gear gear are directly connected to each other.

[0029] When the moving distance is greater than the second preset distance, it is determined that the synchronous gear sleeve and the shift gear are in a top gear phenomenon in which the synchronous gear sleeve leads the shift gear by half a tooth.

[0030] In a second aspect, the present application provides a tooth shaking control device for a frictionless ring synchronizer, characterized in that it includes:

[0031] An acquisition module, used to acquire the current working condition signal and gear shift signal of the vehicle;

[0032] an applying module, configured to apply a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal when the current operating condition signal indicates that the vehicle is stationary;

[0033] A first control module is used for controlling the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve when a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear of the gear to be entered;

[0034] The second control module is used for controlling the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the rotational torque to realize the jittering of the synchronizer.

[0035] In a third aspect, the present application provides a tooth shaking control device for a frictionless ring synchronizer, characterized in that it includes:

[0036] Memory for storing computer programs;

[0037] A processor is used to implement the steps of the tooth shaking control method of the frictionless ring synchronizer as described in any one of the above items when executing the computer program.

[0038] In a fourth aspect, the present application provides a readable storage medium, characterized in that a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the tooth jitter control method of the frictionless ring synchronizer as described in any of the above items are implemented.

[0039] It can be seen from the above technical solutions that compared with the prior art, the present application has the following advantages:

[0040] The present application first obtains the current operating condition signal and the shift signal of the vehicle. When the current operating condition signal shows that the vehicle is stationary, a synchronization force is applied to the synchronous sleeve of the synchronizer without a friction ring based on the shift signal. Then, when the synchronous sleeve and the gear teeth of the gear to be entered have a tooth-to-tooth phenomenon, the drive motor is controlled to provide a rotational torque to the synchronous sleeve while applying a synchronization force to the synchronous sleeve. Finally, based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer. In this way, when the vehicle is stationary and the tooth-to-tooth phenomenon occurs, the synchronization force and the rotational torque are provided to the synchronous sleeve at the same time, thereby improving the success rate of shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A flow chart of a tooth shaking control method of a frictionless ring synchronizer provided in the present application;

[0042] Figure 2 A schematic diagram of a hybrid power system with clutch and synchronizer shifting provided in this application;

[0043] Figure 3 A schematic diagram of the structure of a lock ring type inertial synchronizer provided in this application;

[0044] Figure 4 A schematic diagram of a hybrid power system with synchronizer shifting only provided for this application;

[0045] Figure 5 A schematic diagram of a synchronizer structure without a synchronization ring provided in this application;

[0046] Figure 6 A schematic diagram of the position change of a synchronous gear sleeve and a gear tooth during the meshing process provided by the present application;

[0047] Figure 7 A schematic diagram of the meshing relationship between the synchronous gear sleeve and the gear teeth in a first position provided by the present application;

[0048] Figure 8 A schematic diagram of the meshing relationship between the synchronous gear sleeve and the gear teeth in a second position provided by the present application;

[0049] Fig. 9 A schematic diagram of the control of the synchronization force and the driving motor torque of a synchronization sleeve and a gear tooth in the first position provided by the present application;

[0050] Fig.10 A schematic diagram of the control of the synchronization force and the driving motor torque of a synchronization sleeve and a gear gear in the second position provided by the present application;

[0051] Fig.11 A schematic structural diagram of a tooth shaking control device of a frictionless ring synchronizer provided in the present application. DETAILED DESCRIPTION

[0052] As mentioned above, for hybrid power systems with only synchronizer shifting, the existing gear shifting technology that relies solely on synchronization force cannot guarantee the success rate of gear shifting. Specifically, when the vehicle is stationary, synchronizer shifting is usually used to determine the travel of the synchronizer and the end point position after shifting. When the vehicle is stationary, gear shifting is more likely to cause top gearing. In the prior art, when the top gearing phenomenon occurs in a hybrid power system with a clutch and synchronizer shifting, the synchronizer position is generally moved to neutral, the engine is idling, the clutch torque is controlled, the clutch is slightly closed to drive the input gear shaft to rotate, the clutch is opened, and after the clutch is opened, the synchronizer shifting is re-controlled, and only the synchronization force is used to eliminate the top gearing phenomenon. However, in order to reduce costs, clutches are gradually eliminated. For hybrid power systems with only synchronizer shifting, since the input gear shaft has a large moment of inertia after connecting the drive motor and the engine, the above steps cannot be used to eliminate the top gearing phenomenon, that is, the synchronization force alone cannot guarantee the success rate of gear shifting.

[0053] In order to solve the above problems, the present application provides a method for controlling the jittering of a friction-ring-free synchronizer, comprising: first obtaining a current operating condition signal and a shift signal of a vehicle. When the current operating condition signal indicates that the vehicle is stationary, a synchronization force is applied to the synchronization sleeve of the friction-ring-free synchronizer based on the shift signal. Then, when the synchronization sleeve and the gear teeth of the gear to be entered collide with each other, the drive motor is controlled to provide a rotational torque to the synchronization sleeve while applying a synchronization force to the synchronization sleeve. Finally, based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0054] In this way, when the vehicle is stationary and the tooth top phenomenon occurs, the synchronous gear sleeve is provided with synchronization force and rotational torque at the same time, thereby improving the success rate of shifting gears.

[0055] It should be noted that the tooth-shaking control method of a frictionless ring synchronizer and related products provided by the present application can be applied to the technical field of hybrid vehicle gearboxes. The above is only an example and does not limit the application field of the tooth-shaking control method of a frictionless ring synchronizer and related products provided by the present application.

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] Figure 1 A flowchart of a tooth jitter control method for a frictionless ring synchronizer provided in this application. Figure 1 As shown, the present application provides a tooth shaking control method of a frictionless ring synchronizer, which may include:

[0058] S101: Acquire the current operating condition signal and gear shift signal of the vehicle.

[0059] In practical applications, when the vehicle is stationary, the synchronizer shifting is usually used to determine the synchronizer travel and the end point position after shifting, etc. When the vehicle is stationary, the gear shifting is more likely to cause the top gear phenomenon.

[0060] In the prior art, Figure 2 A schematic diagram of a hybrid power system with clutch and synchronizer shifting provided in this application. Figure 3 A schematic diagram of a locking ring type inertial synchronizer structure provided in this application. Figure 2 , Figure 3 As shown, the hybrid system with clutch and synchronizer shifting includes synchronizer, input gear shaft, clutch, drive motor and engine, and the lock ring type inertial synchronizer includes engagement gear ring, synchronizer ring, engagement sleeve, locating pin, slider, spring and spline hub. When the hybrid system with clutch and synchronizer shifting has top gear phenomenon, generally, the steps of moving the synchronizer position to neutral, idling the engine, controlling the clutch torque, slightly closing the clutch to drive the input gear shaft to rotate, opening the clutch, and re-controlling the synchronizer to shift after the clutch is opened are followed to eliminate the top gear phenomenon by only using the synchronization force F1. Figure 4 A schematic diagram of a hybrid power system with synchronizer shifting only is provided for this application.

[0061] Figure 5 A schematic diagram of a synchronizer structure without a synchronization ring provided in this application. Figure 4 , Figure 5As shown, a hybrid system with only synchronizer shifting includes a synchronizer, an input gear shaft, a drive motor, a torsional vibration damper and an engine, and a synchronizer without a synchronizer ring includes a coupling sleeve, a locating pin, a slider, a spring and a spline hub. In order to reduce costs, clutches are gradually eliminated. For a hybrid system with only synchronizer shifting, it is impossible to continue to use the above steps to eliminate the top tooth phenomenon, that is, the success rate of shifting cannot be guaranteed by the synchronization force F1 alone. In this regard, the present application provides a tooth shaking control method for a frictionless ring synchronizer, when the vehicle of a hybrid system with only synchronizer shifting is stationary and the top tooth phenomenon occurs, the synchronization force and rotational torque are simultaneously provided to the synchronization sleeve, thereby improving the success rate of shifting. Specifically, the tooth shaking control device of the frictionless ring synchronizer needs to obtain the current working condition signal and the shift signal of the vehicle through a sensor. It can be understood that the current working condition signal includes the vehicle being stationary and the vehicle moving, and the shift signal is a prompt signal given to the vehicle by the driver through the shifting action.

[0062] S102: When the current operating condition signal indicates that the vehicle is stationary, applying a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal.

[0063] In actual applications, the jitter control device of the frictionless ring synchronizer obtains the current working condition signal of the vehicle in real time through sensors. When the driver provides a shift action, if the jitter control device of the frictionless ring synchronizer receives the shift signal corresponding to the shift action and determines that the vehicle is in a stationary working condition at this time, it will provide a synchronization force for the synchronizer. At the same time, the synchronous gear sleeve on the synchronizer will also receive a synchronization force of the same direction and magnitude to push the synchronous gear sleeve toward the gear teeth to be entered. It should be noted that the value of the synchronization force is only the force to move the synchronous gear sleeve. Its value is determined by the mechanical friction of the system and the speed of the mobile synchronizer, and can be adjusted according to actual conditions. The example shown is selected as 400N.

[0064] S103: When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to provide a rotational torque to the synchronous gear sleeve while applying a synchronizing force to the synchronous gear sleeve.

[0065] In actual applications, there is a gap between the synchronous gear sleeve and the gear teeth, and the meshing between the synchronous gear sleeve and the gear teeth can be achieved under the action of the synchronization force. However, if there is no gap between the synchronous gear sleeve and the gear teeth, then the top tooth phenomenon will occur between the synchronous gear sleeve and the gear teeth to be shifted. It is understandable that in order to reduce costs, the clutch is eliminated. For hybrid systems with only synchronizer shifting, after the input gear shaft is connected to the drive motor and the engine, the rotational inertia of the input gear shaft is very large, and the success rate of shifting cannot be guaranteed by the synchronization force alone. Therefore, it is necessary to provide a rotational torque to the synchronous gear sleeve while applying the synchronization force to the synchronous gear sleeve. In this way, the synchronous gear sleeve is driven to rotate by the rotational torque, so that a gap appears between the synchronous gear sleeve and the gear teeth, and then the continuous synchronization force can be used to achieve the meshing of the synchronous gear sleeve and the gear teeth.

[0066] S104: Based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0067] In actual application, when the synchronous gear sleeve and the gear teeth of the gear to be entered are in contact with each other, the rotational torque can cause a gap to appear between the synchronous gear sleeve and the gear teeth. In this way, when a gap appears between the synchronous gear sleeve and the gear teeth, the continuously applied synchronization force will push the synchronizer, control the synchronous gear sleeve to mesh with the gear teeth, and realize the jitter of the synchronizer.

[0068] In addition, since the methods for determining whether the synchronous gear sleeve and the gear gear have a tooth-to-tooth collision phenomenon are different, the present application can describe a possible determination method.

[0069] In one case, with respect to how to determine whether a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear teeth, when a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear teeth of the gear to be entered, based on the position of the synchronous gear sleeve and the gear teeth, controlling the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve, further includes:

[0070] Determining a moving distance of the synchronous gear sleeve based on a sensor;

[0071] When the moving distance is less than or equal to a first preset distance, it is determined that a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear;

[0072] When the moving distance is greater than the first preset distance, it is determined that no tooth collision occurs between the synchronous gear sleeve and the gear gear.

[0073] In practical applications, the relative position of the synchronous gear sleeve can be determined by a sensor, thereby determining whether a tooth collision occurs between the synchronous gear sleeve and the gear teeth. Specifically, the tooth shaking control device of the frictionless ring synchronizer can determine the moving distance of the synchronous gear sleeve by a sensor. Figure 6 A schematic diagram of the position change of a synchronous gear sleeve and a gear tooth during the meshing process provided by the present application. Figure 6 As shown, when the synchronous sleeve in the initial position reaches the meshing position under the action of the synchronization force F1, the moving distance of the synchronous sleeve is z, and when the side top teeth or direct top teeth appear, the moving distance of the synchronous sleeve is less than or equal to y, so the first preset distance can be set between y and z, and the specific size can be set according to the specific hardware. In this way, when the moving distance is less than or equal to the first preset distance, it is determined that the synchronous sleeve and the gear teeth have a top tooth phenomenon; when the moving distance is greater than the first preset distance, it is determined that the synchronous sleeve and the gear teeth do not have a top tooth phenomenon.

[0074] In addition, since the rotational torque provided for the synchronous gear sleeve is not the same, the present application can be described in terms of a possible provision method.

[0075] In one case, regarding how to provide a rotational torque for the synchronous gear sleeve, correspondingly, S103: when the synchronous gear sleeve and the gear teeth of the gear to be entered have a tooth collision phenomenon, controlling the drive motor to provide a rotational torque for the synchronous gear sleeve while applying a synchronization force to the synchronous gear sleeve may specifically include:

[0076] When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to provide the synchronous gear sleeve with a rotation torque changing from a positive direction to a reverse direction while applying a synchronization force to the synchronous gear sleeve.

[0077] In practical applications, the toothing phenomenon of the synchronous gear sleeve and the gear teeth to be entered can be divided into direct toothing and side toothing, and the side toothing can be further divided into the synchronous gear sleeve leading the gear teeth by half a tooth and the synchronous gear sleeve lagging behind the gear teeth by half a tooth. It can be imagined that when the synchronous gear sleeve directly touches the gear teeth to be entered or the synchronous gear sleeve leads the gear teeth by half a tooth, when the synchronous force is applied to push the synchronous gear sleeve to move toward the gear teeth, the synchronous gear sleeve tooth surface contacts the gear teeth surface, and the synchronous gear sleeve cannot continue to move. At this time, the drive motor provides a positive rotation torque to the synchronous gear sleeve, so that a gap is generated between the synchronous gear sleeve and the gear teeth, and under the action of the synchronous force, the synchronous gear sleeve and the gear teeth can mesh. When the synchronous gear sleeve lags behind the gear teeth by half a tooth, the positive rotational torque will cause the tooth bevel of the synchronous gear sleeve to continue to squeeze the bevel of the gear teeth. Since the gear teeth are connected to the wheels at this time and the vehicle is stationary, the gear teeth cannot rotate, so the synchronous gear sleeve and the gear teeth cannot mesh. In this way, this problem can be solved by the reverse rotational torque. Therefore, when the synchronous gear sleeve and the gear teeth to be entered occur the top tooth phenomenon, the tooth shaking control device of the frictionless ring synchronizer can control the drive motor to apply the synchronization force to the synchronous gear sleeve while providing the synchronous gear sleeve with a rotational torque that changes from positive to reverse. It should be noted that when the vehicle is stationary, the gear teeth are stationary. When the synchronizer is in neutral, the input gear shaft can drive the synchronous gear sleeve to rotate; when the synchronizer is in gear, the spring in the torsional vibration damper can rotate at a certain angle under the action of external force, so it can also drive the input gear shaft and the synchronous gear sleeve to rotate. The stiffness of the torsional vibration damper is 9.2Nm / degree, and the synchronizer meshing teeth are 48. The torque required for the synchronizer meshing teeth to rotate half a tooth is ((360 / 48) / 2)*(9.2)=34.5Nm. It is understandable that the rotation torque provided in the present application can be changed slowly and continuously from 0Nm to 34.5Nm, then from 34.5Nm to 0Nm, and then from 0Nm to -34.5Nm. The specific change rate can be set according to actual needs.

[0078] In addition, since the methods for determining the position of the synchronization sleeve and the gear teeth are not the same, the present application can describe a possible determination method.

[0079] In one case, with respect to how to determine the position of the synchronous gear sleeve and the gear teeth, accordingly, before controlling the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the rotational torque to achieve the jittering of the synchronizer, the method further includes:

[0080] When the synchronizer has a tendency to shift into a gear and the current rotational torque is in a positive direction, determining that the position of the synchronizer sleeve and the gear tooth is a first position, and recording the current rotational torque as the first rotational torque;

[0081] When the synchronizer has a tendency to shift into a gear, and the current rotational torque is in the reverse direction, the position of the synchronizer sleeve and the gear tooth is determined to be a second position, and the current rotational torque is recorded as the second rotational torque.

[0082] In practical applications, Figure 7 A schematic diagram of the meshing relationship between a synchronous gear sleeve and a gear tooth in a first position provided in the present application. Figure 8 This is a schematic diagram of the meshing relationship between the synchronous gear sleeve and the gear teeth in the second position provided by the present application. Figure 7 , Figure 8 As can be seen from the above, the toothing phenomenon between the synchronous gear sleeve and the gear teeth to be shifted can be divided into direct toothing and side toothing, and the side toothing can be further divided into the synchronous gear sleeve leading the gear teeth by half a tooth and the synchronous gear sleeve lagging behind the gear teeth by half a tooth. Different toothing phenomena result in different position conditions of the synchronous gear sleeve and the gear teeth. Specifically, when there is a toothing phenomenon between the synchronous gear sleeve and the gear teeth, the synchronous gear sleeve cannot move despite the action of the synchronization force F. For this situation, the tooth shaking control device of the frictionless ring synchronizer first controls the drive motor to provide a positive rotational torque that changes slowly and continuously from 0Nm to 34.5Nm. If the synchronizer has a tendency to shift gears, that is, the relative position of the synchronizer has a tendency to approach the gear teeth, the position condition of the synchronous gear sleeve and the gear teeth in this case is recorded as the first position condition, and the rotational torque when the shift gear tendency occurs is recorded as the first rotational torque, such as Figure 7 a in the figure indicates the direct top gear, and b indicates that the synchronous gear sleeve is half a tooth ahead of the gear teeth. If the forward rotation torque is 34.5 Nm, the synchronizer still has no tendency to advance the gear, and the jitter control device of the frictionless ring synchronizer controls the drive motor to change the forward rotation torque of 34.5 Nm to the reverse rotation torque of -34.5 Nm. If the synchronizer has a tendency to advance the gear, and the current rotation torque is in the reverse direction, the position of the synchronous gear sleeve and the gear teeth is determined to be the second position, and the current rotation torque is recorded as the second rotation torque, such as Figure 8 The middle synchronization gear sleeve lags behind the gear gear by half a tooth as shown.

[0083] In addition, since the methods of controlling the meshing of the synchronous gear sleeve and the gear teeth are not the same, the present application can describe a possible control method.

[0084] In one case, regarding how to control the meshing of the synchronous gear sleeve and the gear teeth, correspondingly, S104: based on the synchronization force and the rotational torque, controlling the meshing of the synchronous gear sleeve and the gear teeth to achieve the jittering of the synchronizer may specifically include:

[0085] When the position of the synchronous gear sleeve and the gear gear is the first position, the magnitude of the first rotation torque is adjusted to obtain a first meshing torque;

[0086] Based on the synchronization force and the first meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0087] In practical applications, combined with the above, it can be known that when the forward rotational torque provided can promote the gear-advancing trend of the synchronizer, the position of the synchronous gear sleeve and the gear teeth is determined to be the first position. In this way, the tooth-shaking control device of the frictionless ring synchronizer can appropriately control the size of the current forward rotational torque, that is, appropriately adjust the size of the first rotational torque without changing the direction, obtain the first meshing torque that can be used for the synchronous gear sleeve to mesh with the gear teeth, and then control the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the first meshing torque to achieve the tooth-shaking of the synchronizer. It can be understood that, generally, when the rotational torque can promote the gear-advancing trend of the synchronizer, the tooth-shaking control device of the frictionless ring synchronizer needs to appropriately increase the rotational torque so that the gap between the synchronous gear sleeve and the gear teeth is sufficient to meet the non-tip gear, and the specific adjustment size can be determined according to the actual hardware conditions.

[0088] In addition, since the methods of controlling the meshing of the synchronous gear sleeve and the gear teeth are not the same, the present application can describe a possible control method.

[0089] In one case, regarding how to control the meshing of the synchronous gear sleeve and the gear teeth, correspondingly, S104: based on the synchronization force and the rotational torque, controlling the meshing of the synchronous gear sleeve and the gear teeth to achieve the jittering of the synchronizer may further include:

[0090] When the position of the synchronous gear sleeve and the gear gear is the second position, the magnitude of the second rotational torque is adjusted to obtain a second meshing torque;

[0091] Based on the synchronization force and the second meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0092] In practical applications, combined with the above, it can be seen that when the reverse rotation torque provided can promote the shifting trend of the synchronizer, the position of the synchronous gear sleeve and the gear teeth is determined to be the second position. In this way, the jittering control device of the frictionless ring synchronizer can properly control the size of the current reverse rotation torque, that is, properly adjust the size of the second rotation torque without changing the direction, and obtain the second meshing torque that can be used for the synchronous gear sleeve to mesh with the gear teeth, and then control the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the second meshing torque to achieve the jittering of the synchronizer. It can be understood that the adjustment method of the second rotation torque is the same as the first rotation torque.

[0093] In addition, since the methods for distinguishing the specific top tooth types of the synchronous gear sleeve and the gear gear are different, the present application can describe a possible distinction method.

[0094] In one case, with respect to how to distinguish the specific top tooth types of the synchronous gear sleeve and the gear gear, the method further includes:

[0095] When the position of the synchronous gear sleeve and the gear gear is in a first position, determining the moving distance of the synchronous gear sleeve based on a sensor;

[0096] When the moving distance is equal to the second preset distance, it is determined that the synchronous gear sleeve and the gear gear are directly connected to each other.

[0097] When the moving distance is greater than the second preset distance, it is determined that the synchronous gear sleeve and the shift gear are in a top gear phenomenon in which the synchronous gear sleeve leads the shift gear by half a tooth.

[0098] In practical applications, the relative position of the synchronous gear sleeve can also be determined by the sensor, thereby determining the specific type of top tooth between the synchronous gear sleeve and the gear gear. Specifically, the jitter control device of the frictionless ring synchronizer can determine the moving distance of the synchronous gear sleeve through the sensor. Figure 6 As shown, when the synchronous sleeve in the initial position reaches the meshing position under the action of the synchronization force F1, the moving distance of the synchronous sleeve is z, when the direct top tooth appears, the moving distance of the synchronous sleeve is x, and when the side top tooth appears, the moving distance of the synchronous sleeve should be between x and y, so the second preset distance can be set to x, when the position of the synchronous sleeve and the gear tooth is the first position, if the moving distance of the synchronous sleeve is equal to the second preset distance, it is determined that the synchronous sleeve and the gear tooth are the top tooth phenomenon of the direct top tooth; if the moving distance of the synchronous sleeve is greater than the second preset distance, it is determined that the synchronous sleeve and the gear tooth are the top tooth phenomenon of the synchronous sleeve leading the gear tooth by half a tooth. It can be understood that if the position of the synchronous sleeve and the gear tooth is the second position, it can be directly determined that the synchronous sleeve and the gear tooth are the top tooth phenomenon of the synchronous sleeve lagging behind the gear tooth by half a tooth.

[0099] Fig. 9 A schematic diagram of the control of the synchronization force and the driving motor torque of a synchronous gear sleeve and a gear gear in the first position provided by the present application. Fig. 9 As shown, the horizontal axis is the gear shifting process, including moving from the top tooth point in neutral, top tooth, passing the top tooth area, smooth movement, blocked movement, smooth gear shifting, gear shifting deceleration, endpoint confirmation, and returning to neutral, and the vertical axis divides the synchronizer displacement, synchronization force, and drive motor into regions. Fig. 9It is clear to see the changes in the synchronizer displacement, the size of the synchronizing force, and the size of the torque of the drive motor when the synchronizer sleeve and the gear teeth are in the first position to achieve the shifting process. Among them, in the range of movement obstruction and smooth shifting, if the number of teeth rotated by the crankshaft is greater than 4, the torque of the drive motor can be reduced, and the torque can be maintained by fluctuation control to facilitate the smooth movement of the synchronizer. In addition, the fork speed is limited in the gear shifting deceleration range, and the end point confirmation range is controlled by the fork force to increase the synchronizing force. When the synchronizer fork detects that the fork is moving too fast in neutral or in the gear, the synchronizing force is reduced.

[0100] Fig.10 A schematic diagram of the control of the synchronization force and the driving motor torque of a synchronous gear sleeve and a gear gear in the second position provided by the present application. Fig.10 As shown, the horizontal axis is also the shifting process, including moving from the top tooth point in neutral, top tooth, passing the top tooth area, smooth movement, blocked movement, smooth shifting, shifting deceleration, endpoint confirmation and returning to neutral, and the vertical axis is also divided into regions for synchronizer displacement, synchronization force and drive motor. Fig.10 It is clear to see the change process of synchronizer displacement, synchronization force and drive motor torque when the synchronizer sleeve and the gear teeth are in the second position. In the range of movement obstruction and smooth shifting, if the number of teeth rotated by the crankshaft is greater than 4, the drive motor torque can be reduced and maintained by fluctuation control torque, so as to facilitate smooth movement of the synchronizer.

[0101] In summary, the present application first obtains the current operating condition signal and the gear shift signal of the vehicle. When the current operating condition signal shows that the vehicle is stationary, a synchronization force is applied to the synchronous sleeve of the synchronizer without a friction ring based on the gear shift signal. Then, when the synchronous sleeve and the gear teeth of the gear to be entered have a tooth-top phenomenon, the drive motor is controlled to provide a rotational torque to the synchronous sleeve while applying a synchronization force to the synchronous sleeve. Finally, based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer. In this way, when the vehicle is stationary and the tooth-top phenomenon occurs, the synchronization force and the rotational torque are provided to the synchronous sleeve at the same time, thereby improving the success rate of shifting.

[0102] Based on the tooth-shaking control method of a frictionless ring synchronizer provided in the above embodiment, the present application also provides a tooth-shaking control device of a frictionless ring synchronizer. The tooth-shaking control device of a frictionless ring synchronizer is described below in combination with the embodiments and the accompanying drawings.

[0103] Fig.11 A schematic diagram of the structure of a tooth-shaking control device for a frictionless ring synchronizer provided in an embodiment of the present application. Fig.11 As shown, the tooth shaking control device 200 of the frictionless ring synchronizer provided in the embodiment of the present application includes:

[0104] An acquisition module 201 is used to acquire a current operating condition signal and a gear shift signal of the vehicle;

[0105] an applying module 202, configured to apply a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal when the current operating condition signal indicates that the vehicle is stationary;

[0106] The first control module 203 is used to control the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve when the synchronous gear sleeve and the gear gear of the gear to be entered are at each other;

[0107] The second control module 204 is used to control the meshing of the synchronization sleeve and the gear teeth based on the synchronization force and the rotational torque to achieve the jittering of the synchronizer.

[0108] As an implementation manner, in order to determine whether the synchronous gear sleeve and the gear teeth have a tooth-tip phenomenon, the tooth-tip control device 200 of the frictionless ring synchronizer further includes: a first determination module;

[0109] A first determination module, configured to determine a moving distance of the synchronization gear sleeve based on a sensor;

[0110] When the moving distance is less than or equal to a first preset distance, it is determined that a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear;

[0111] When the moving distance is greater than the first preset distance, it is determined that no tooth collision occurs between the synchronous gear sleeve and the gear gear.

[0112] As an implementation manner, with respect to how to provide a rotational torque for the synchronous gear sleeve, the first control module 203 is specifically used to:

[0113] When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to provide the synchronous gear sleeve with a rotation torque changing from a positive direction to a reverse direction while applying a synchronization force to the synchronous gear sleeve.

[0114] As an implementation manner, with respect to how to determine the position of the synchronous gear sleeve and the gear teeth, the above-mentioned tooth shaking control device 200 of the frictionless ring synchronizer further includes: a second determination module;

[0115] a second determination module, for determining that the position of the synchronous gear sleeve and the gear tooth is a first position when the synchronizer has a tendency to shift into a gear and the current rotational torque is positive, and recording the current rotational torque as the first rotational torque;

[0116] When the synchronizer has a tendency to shift into a gear, and the current rotational torque is in the reverse direction, the position of the synchronizer sleeve and the gear tooth is determined to be a second position, and the current rotational torque is recorded as the second rotational torque.

[0117] As an implementation manner, with respect to how to control the meshing of the synchronous gear sleeve and the gear teeth, the second control module 204 is specifically used to:

[0118] When the position of the synchronous gear sleeve and the gear gear is the first position, the magnitude of the first rotation torque is adjusted to obtain a first meshing torque;

[0119] Based on the synchronization force and the first meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0120] As an implementation manner, with respect to how to control the meshing of the synchronous gear sleeve and the gear teeth, the second control module 204 is further specifically used for:

[0121] When the position of the synchronous gear sleeve and the gear gear is the second position, the magnitude of the second rotational torque is adjusted to obtain a second meshing torque;

[0122] Based on the synchronization force and the second meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

[0123] As an implementation manner, in order to determine the position of the synchronous gear sleeve and the gear gear when the top gear phenomenon occurs, the above-mentioned frictionless ring synchronizer jitter control device 200 further includes: a third determination module;

[0124] A third determination module, configured to determine a moving distance of the synchronous gear sleeve based on a sensor when the position of the synchronous gear sleeve and the gear gear is in a first position;

[0125] When the moving distance is equal to the second preset distance, it is determined that the synchronous gear sleeve and the gear gear are directly connected to each other.

[0126] When the moving distance is greater than the second preset distance, it is determined that the synchronous gear sleeve and the shift gear are in a top gear phenomenon in which the synchronous gear sleeve leads the shift gear by half a tooth.

[0127] In summary, the present application first obtains the current operating condition signal and the gear shift signal of the vehicle. When the current operating condition signal shows that the vehicle is stationary, a synchronization force is applied to the synchronous sleeve of the synchronizer without a friction ring based on the gear shift signal. Then, when the synchronous sleeve and the gear teeth of the gear to be entered have a tooth-top phenomenon, the drive motor is controlled to provide a rotational torque to the synchronous sleeve while applying a synchronization force to the synchronous sleeve. Finally, based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer. In this way, when the vehicle is stationary and the tooth-top phenomenon occurs, the synchronization force and the rotational torque are provided to the synchronous sleeve at the same time, thereby improving the success rate of shifting.

[0128] In addition, the present application also provides a tooth shaking control device for a frictionless ring synchronizer, comprising: a memory for storing a computer program; and a processor for implementing the steps of the tooth shaking control method for a frictionless ring synchronizer as described in any one of the above items when executing the computer program.

[0129] In addition, the present application also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the tooth jitter control method of the frictionless ring synchronizer as described in any of the above items are implemented.

[0130] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooth shaking control method for a frictionless ring synchronizer, characterized in that: The method comprises: Obtain the vehicle's current operating condition signal and gear shift signal; When the current operating condition signal indicates that the vehicle is stationary, applying a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal; When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve at the same time; Based on the synchronization force and the rotational torque, the synchronization sleeve is controlled to engage with the gear teeth to achieve the tooth jitter of the synchronizer.

2. The method according to claim 1, characterized in that When the synchronous gear sleeve and the gear teeth of the gear to be entered are in a tooth-to-tooth phenomenon, based on the position of the synchronous gear sleeve and the gear teeth, before controlling the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve, the method further includes: Determining a moving distance of the synchronous gear sleeve based on a sensor; When the moving distance is less than or equal to a first preset distance, it is determined that a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear; When the moving distance is greater than the first preset distance, it is determined that no tooth collision occurs between the synchronous gear sleeve and the gear gear.

3. The method according to claim 1, characterized in that When the synchronous gear sleeve and the gear teeth of the gear to be entered occur a tooth collision phenomenon, controlling the driving motor to apply a synchronization force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve at the same time, comprises: When the synchronous gear sleeve and the gear teeth of the gear to be entered collide with each other, the driving motor is controlled to provide the synchronous gear sleeve with a rotation torque changing from a positive direction to a reverse direction while applying a synchronization force to the synchronous gear sleeve.

4. The method according to claim 1, characterized in that Before controlling the synchronization sleeve to mesh with the gear teeth based on the synchronization force and the rotational torque to achieve the gear shaking of the synchronizer, the method further includes: When the synchronizer has a tendency to shift into a gear and the current rotational torque is in a positive direction, determining that the position of the synchronizer sleeve and the gear tooth is a first position, and recording the current rotational torque as the first rotational torque; When the synchronizer has a tendency to shift into a gear and the current rotational torque is in the reverse direction, the position of the synchronizer sleeve and the gear tooth is determined to be a second position, and the current rotational torque is recorded as the second rotational torque.

5. The method according to claim 4, characterized in that The method of controlling the meshing of the synchronous gear sleeve with the gear teeth based on the synchronization force and the rotational torque to achieve the tooth shaking of the synchronizer includes: When the position of the synchronous gear sleeve and the gear gear is the first position, the magnitude of the first rotation torque is adjusted to obtain a first meshing torque; Based on the synchronization force and the first meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

6. The method according to claim 4, characterized in that The method of controlling the meshing of the synchronous gear sleeve with the gear teeth based on the synchronization force and the rotational torque to achieve the tooth jittering of the synchronizer comprises: When the position of the synchronous gear sleeve and the gear gear is in the second position, the magnitude of the second rotational torque is adjusted to obtain a second meshing torque; Based on the synchronization force and the second meshing torque, the synchronization sleeve is controlled to mesh with the gear teeth to achieve the jittering of the synchronizer.

7. The method according to claim 4, characterized in that The method further comprises: When the position of the synchronous gear sleeve and the gear gear is in a first position, determining the moving distance of the synchronous gear sleeve based on a sensor; When the moving distance is equal to the second preset distance, it is determined that the synchronous gear sleeve and the gear gear are directly connected to each other. When the moving distance is greater than the second preset distance, it is determined that the synchronous gear sleeve and the shift gear are in a top gear phenomenon in which the synchronous gear sleeve leads the shift gear by half a tooth.

8. A tooth shaking control device for a frictionless ring synchronizer, characterized in that: include: An acquisition module, used to acquire the current working condition signal and gear shift signal of the vehicle; an applying module, configured to apply a synchronizing force to a synchronizing sleeve of a synchronizer without a friction ring based on the shift signal when the current operating condition signal indicates that the vehicle is stationary; A first control module is used for controlling the drive motor to apply a synchronizing force to the synchronous gear sleeve and provide a rotational torque to the synchronous gear sleeve when a tooth collision phenomenon occurs between the synchronous gear sleeve and the gear gear of the gear to be entered; The second control module is used for controlling the meshing of the synchronous gear sleeve and the gear teeth based on the synchronization force and the rotational torque to realize the jittering of the synchronizer.

9. A tooth-shaking control device for a frictionless ring synchronizer, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the tooth jitter control method of the frictionless ring synchronizer as claimed in any one of claims 1 to 7 when executing the computer program.

10. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the tooth shaking control method of the frictionless ring synchronizer as claimed in any one of claims 1 to 7 are implemented.

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