A control method and device of a hydraulic retarder system, a vehicle and a storage medium

Abstract

The present application relates to the technical field of vehicles, and specifically discloses a control method and device for a hydraulic retarder system, a vehicle and a storage medium, wherein the control method for the hydraulic retarder system acquires a control instruction of the hydraulic retarder; when the control instruction is a starting instruction, a synchronizer is combined with an enablement; the rotational speed V11 of a rotor is acquired; the rotational speed V12 of a driving gear is acquired; a first rotational speed difference rate is calculated, the first rotational speed difference rate=(V12-V11) / V12; and the hydraulic retarder is started when the first rotational speed difference rate is not more than a first set value. The rotational speed of the rotor and the rotational speed of the driving gear are both stable when the hydraulic retarder is started, and normal operation can be maintained, thereby avoiding power jerk and improving the user driving experience.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a control method, device, vehicle, and storage medium for a hydraulic retarder system. Background Technology

[0002] Hydraulic retarders utilize the damping effect of fluid flow to generate a counter-driving braking force opposite to the positive driving force, thereby slowing down the vehicle and providing auxiliary braking. In China, most mainstream hydraulic retarders use parallel hydraulic retarders, with the power input to the retarder being a constantly meshed input gear with the transmission. This input gear and the retarder drive gear are also constantly meshed, and the drive gear is splined to the retarder rotor shaft, keeping the retarder constantly rotating. In this design, because the stator and rotor inside the retarder are constantly rotating, even when the retarder is not in operation, the internal air disturbance still generates braking torque. This requires additional power to overcome resistance during vehicle operation, ultimately increasing fuel consumption.

[0003] In response to this, prior art, such as the earlier patent application number CN201610480263.6, discloses a connection structure between a transmission and a parallel hydraulic retarder. This structure adds a synchronizer to the output shaft of the transmission and mounts a drive gear for transmitting power to the hydraulic retarder on the output shaft. A driver engages or disengages the synchronizer and drive gear, allowing power transmission between the transmission output shaft and the drive gear to occur or discontinue, thus enabling power transmission between the transmission output shaft and the hydraulic retarder to occur or discontinue. This allows for selection of whether the hydraulic retarder input shaft rotates according to actual usage needs, thereby reducing energy consumption and extending service life. However, this hydraulic retarder is prone to uneven power delivery during use, especially when establishing and discontinuing power transmission between the transmission output shaft and the hydraulic retarder, affecting the user's driving experience. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, vehicle, and storage medium for a hydraulic retarder system, in order to solve the problem that uneven power transmission easily occurs when establishing power transmission between the transmission output shaft and the hydraulic retarder, which affects the user's driving experience.

[0005] On one hand, the present invention provides a control method for a hydraulic retarder system. The hydraulic retarder system includes a transmission, a synchronizer, a hydraulic retarder, and a drive mechanism. The output shaft of the transmission is provided with an input gear. The hydraulic retarder includes a housing, a rotor shaft rotatably disposed on the housing, a rotor fixedly disposed on the rotor shaft, and a drive gear rotatably disposed on the rotor shaft and meshing with the input gear. The rotor is located inside the housing, and the drive gear is located outside the housing. The synchronizer is slidably disposed on the rotor shaft and can drive the rotor shaft to rotate synchronously. The drive mechanism is used to drive the synchronizer to engage or disengage with the drive gear. The control method for the hydraulic retarder system includes:

[0006] Obtain the control command for the hydraulic retarder, wherein the control command is a start command or a stop command;

[0007] When the control command is a start command, the synchronizer is enabled to drive the drive gear to the rotor shaft.

[0008] Obtain the rotor speed V11;

[0009] Obtain the rotational speed V12 of the drive gear;

[0010] Calculate the first slip ratio, where the first slip ratio = (V12 - V11) / V12;

[0011] When the first slip does not exceed the first set value, the hydraulic retarder is activated.

[0012] As a preferred technical solution for the control method of the hydraulic retarder system, a high-pressure gas path is provided inside the housing. The high-pressure gas path is used to connect to an external high-pressure gas source and to deliver high-pressure gas into the housing. The hydraulic retarder also includes a proportional valve for adjusting the opening of the high-pressure gas path.

[0013] Activating the hydraulic retarder includes: opening the proportional valve to allow high-pressure gas to enter the housing.

[0014] As a preferred technical solution for the control method of the hydraulic retarder system, obtaining the control commands for the hydraulic retarder includes:

[0015] The position of the control handle of the hydraulic retarder is obtained. When the handle is in a non-neutral position, the control command is determined to be a start command.

[0016] As a preferred technical solution for the control method of the hydraulic retarder system, when the handle is in the neutral position, the control command is determined to be a shut-off command.

[0017] As a preferred technical solution for the control method of the hydraulic retarder system, the control method of the hydraulic retarder system further includes:

[0018] When the control command obtained for the hydraulic retarder is a shutdown command;

[0019] The synchronizer is deactivated to disconnect the drive gear from the rotor shaft transmission.

[0020] Obtain the rotor speed V21;

[0021] Obtain the rotational speed V22 of the drive gear;

[0022] Calculate the second slip ratio, which is: second slip ratio = (V22 - V21) / V22;

[0023] When the second slip exceeds the second set value, the hydraulic retarder is turned off.

[0024] As a preferred technical solution for the control method of the hydraulic retarder system, a high-pressure gas path is provided inside the housing. The high-pressure gas path is used to connect to an external high-pressure gas source and to deliver high-pressure gas into the housing. The hydraulic retarder also includes a proportional valve for adjusting the opening of the high-pressure gas path.

[0025] Closing the hydraulic retarder includes closing the proportional valve to prevent high-pressure gas from entering the housing.

[0026] Secondly, the present invention provides a control device for a hydraulic retarder system. The hydraulic retarder system includes a transmission, a synchronizer, a hydraulic retarder, and a drive mechanism. The output shaft of the transmission is provided with an input gear. The hydraulic retarder includes a housing, a rotor shaft rotatably disposed on the housing, a rotor fixedly disposed on the rotor shaft, and a drive gear rotatably disposed on the rotor shaft and meshing with the input gear. The rotor is located inside the housing, and the drive gear is located outside the housing. The synchronizer is slidably disposed on the rotor shaft and can drive the rotor shaft to rotate synchronously. The drive mechanism is used to drive the synchronizer to engage or disengage from the drive gear. The control device for the hydraulic retarder system includes:

[0027] The instruction acquisition module is used to acquire the control instructions of the hydraulic retarder, wherein the control instructions are start instructions or stop instructions.

[0028] The combined enable module is used to enable the synchronizer when the control command is a start command, so that the drive gear is connected to the rotor shaft for transmission.

[0029] A rotor speed acquisition module is used to acquire the rotor speed V11;

[0030] A drive gear speed acquisition module is used to acquire the speed V12 of the drive gear;

[0031] The first slip ratio calculation module is used to calculate the first slip ratio, where the first slip ratio = (V12-V11) / V12;

[0032] The start-up execution module is used to start the hydraulic retarder when the first slip rate does not exceed the first set value.

[0033] As a preferred technical solution for the control device of the hydraulic retarder system, the rotor speed acquisition module is further used to acquire the rotor speed V21; the drive gear speed acquisition module is used to acquire the drive gear speed V22; the control device of the hydraulic retarder system also includes:

[0034] The enable module is disconnected when the control command is a shutdown command, so as to disconnect the synchronizer from the drive gear and the rotor shaft transmission.

[0035] The second slip ratio calculation module is used to calculate the second slip ratio, which is: second slip ratio = (V22-V21) / V22;

[0036] The shutdown execution module is used to shut down the hydraulic retarder when the second slip rate exceeds the second set value.

[0037] Thirdly, the present invention also provides a vehicle including a hydraulic retarder system, the vehicle further comprising:

[0038] Controller;

[0039] A rotor speed sensor is used to acquire the rotor speed and send the acquired rotor speed to the controller;

[0040] A drive gear speed sensor is used to acquire the speed of the drive gear and send the acquired speed of the drive gear to the controller;

[0041] Memory, used to store one or more programs;

[0042] When the controller executes one or more programs, it causes the controller to control the vehicle to implement the control method of the hydraulic retarder system as described in any of the above schemes.

[0043] Fourthly, the present invention also provides a storage medium storing a computer program thereon, which, when executed by a controller, enables the vehicle to implement the control method of the hydraulic retarder system as described in any of the above embodiments.

[0044] The beneficial effects of this invention are as follows:

[0045] This invention provides a control method, device, vehicle, and storage medium for a hydraulic retarder system. The control method acquires the control command for the hydraulic retarder. When the control command is a start command, a synchronizer is enabled, the rotor speed V11 and the drive gear speed V12 are acquired, and a first slip ratio is calculated: first slip ratio = (V12 - V11) / V12. The hydraulic retarder is activated when the first slip ratio does not exceed a first set value. This ensures that when the hydraulic retarder is activated, both the rotor speed and the drive gear speed are stable and can maintain normal operation, thereby avoiding power jerking and improving the user's driving experience. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the hydraulic retarder system in an embodiment of the present invention;

[0047] Figure 2 This is a flowchart of the control method for the hydraulic retarder system in an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the control device of the hydraulic retarder system in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the vehicle structure in an embodiment of the present invention.

[0050] In the picture:

[0051] 1. Gearbox; 11. Output shaft; 12. Input gear; 13. Tapered bearing;

[0052] 2. Synchronizer;

[0053] 3. Hydraulic retarder; 31. Housing; 32. Rotor shaft; 33. Drive gear; 34. Needle roller bearing; 35. Proportional valve;

[0054] 4. Drive mechanism; 41. Shift fork; 42. Fork shaft; 43. Cylinder;

[0055] 100. Command Acquisition Module; 110. Combination Enable Module; 120. Rotor Speed ​​Acquisition Module; 130. Drive Gear Speed ​​Acquisition Module; 140. First Slip Calculation Module; 150. Start Execution Module; 160. Disconnect Enable Module; 170. Second Slip Calculation Module; 180. Shut Down Execution Module;

[0056] 200. Hydraulic retarder system; 210. Controller; 220. Rotor speed sensor; 230. Drive gear speed sensor; 240. Memory. Detailed Implementation

[0057] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0061] Example 1

[0062] In existing technology, a synchronizer is added to the output shaft of the transmission, and the driving gear for transmitting power to the hydraulic retarder is mounted on the transmission output shaft. A driver engages or disengages the synchronizer with the driving gear, allowing power transmission between the transmission output shaft and the driving gear to occur or discontinue, thus allowing power transmission between the transmission output shaft and the hydraulic retarder to occur or discontinue. This allows selection of whether the hydraulic retarder input shaft rotates according to actual usage needs, thereby reducing energy consumption and extending service life. However, this hydraulic retarder is prone to uneven power delivery during use, especially when establishing and discontinuing power transmission between the transmission output shaft and the hydraulic retarder, affecting the user's driving experience. This is because the power transmission changes gradually when the synchronizer engages and disengages.

[0063] To address this issue, this embodiment provides a control method for a hydraulic retarder system. This control method can be executed by a control device for the hydraulic retarder system, which can be implemented through software and / or hardware and integrated into the vehicle.

[0064] Among them, such as Figure 1 As shown, the hydraulic retarder system includes a transmission 1, a synchronizer 2, a hydraulic retarder 3, and a drive mechanism 4. The output shaft 11 of the transmission 1 is equipped with an input gear 12. The hydraulic retarder 3 includes a housing 31, a rotor shaft 32 rotatably mounted on the housing 31, a rotor fixedly mounted on the rotor shaft 32, and a drive gear 33 rotatably mounted on the rotor shaft 32 and meshing with the input gear 12. The rotor is located inside the housing 31, and the drive gear 33 is located outside the housing 31. The synchronizer 2 is slidably mounted on the rotor shaft 32 and can drive the rotor shaft 32 to rotate synchronously. The drive mechanism 4 is used to drive the synchronizer 2 to engage or disengage from the drive gear 33. Specifically, the drive gear 33 rotates on the rotor shaft 32 via a needle roller bearing 34. The front end of the rotor shaft 32 is connected to a tapered bearing 13, which is fixed to the housing 31 of the transmission 1 to fix the rotor shaft 32 of the retarder and prevent radial runout of the rotor shaft 32 under high-speed operation and to prevent seal failure inside the retarder.

[0065] In this embodiment, the drive mechanism 4 includes a shift fork 41, a fork shaft 42, and a cylinder 43. The shift fork 41 is slidably disposed on the fork shaft 42 and is connected to the synchronizer 2. The cylinder 43 is drively connected to the shift fork 41. The cylinder 43 can drive the shift fork 41 to slide on the fork shaft 42, thereby causing the shift fork 41 to move the synchronizer 2. The synchronizer 2 can engage or disengage with the drive gear 33 to achieve the transmission connection or disconnection between the drive gear 33 and the rotor shaft 32. When the synchronizer 2 engages with the drive gear 33, the power transmission path is: output shaft 11 of the transmission 1 - input gear 12 - drive gear 33 - synchronizer 2 - rotor shaft 32 - rotor. When the synchronizer 2 disengages from the drive gear 33, the power transmission path is: output shaft 11 of the transmission 1 - input gear 12 - drive gear 33. Because the synchronizer 2 and the drive gear 33 are not engaged, power will not be transmitted to the rotor shaft 32, and the hydraulic retarder 3 will not work. This effectively avoids the hydraulic retarder 3 from generating additional braking torque, thus avoiding energy waste.

[0066] In this embodiment, a high-pressure air passage is provided inside the housing 31 of the hydraulic retarder 3. The high-pressure air passage is used to connect to an external high-pressure air source and to deliver high-pressure gas into the housing 31. The hydraulic retarder 3 also includes a proportional valve 35 for adjusting the opening of the high-pressure air passage. The proportional valve 35 can open or close the high-pressure air passage, and when the high-pressure air passage is opened, it can also adjust the flow area of ​​the high-pressure air passage.

[0067] The hydraulic retarder 3 also has a stator inside its housing 31. Both the stator and rotor have blades. When the proportional valve 35 is opened, high-pressure gas enters the housing 31 and the oil in the oil sump of the hydraulic retarder 3 is pumped into the housing 31. As the rotor rotates, the oil is pumped onto the stator and a reaction force, i.e. braking torque, is generated, which reduces the vehicle speed. At the same time, a large amount of heat energy is generated and absorbed by the oil.

[0068] like Figure 2 As shown, the control method of the hydraulic retarder system includes the following steps.

[0069] S100: Receive control commands for hydraulic retarder 3.

[0070] The control commands are either start commands or stop commands.

[0071] Specifically, obtaining the control command for the hydraulic retarder 3 includes: obtaining the position of the control handle of the hydraulic retarder 3; when the handle is in a non-neutral position, determining the control command as a start command; and when the handle is in a neutral position, determining the control command as a stop command.

[0072] S200: Determines whether the control command is a start command or a stop command.

[0073] When the control command is a start command, S300 is executed.

[0074] S300: Synchronizer 2 combination enable.

[0075] Specifically, cylinder 43 drives shift fork 41 to move on fork shaft 42, shift fork 41 drives synchronizer 2 to move so that synchronizer 2 engages drive gear 33, thereby driving gear 33 and rotor shaft 32 to be connected in transmission.

[0076] S400: Obtain the rotor speed V11.

[0077] The rotor speed can be obtained through a rotor speed sensor.

[0078] S500: Obtain the rotational speed V12 of the drive gear 33.

[0079] The rotor speed can be obtained through the speed sensor of drive gear 33.

[0080] S600: Calculate the first slip ratio, first slip ratio = (V12-V11) / V12.

[0081] S700: When the first slip rate does not exceed the first set value, start the hydraulic retarder 3.

[0082] The first set value can be set as needed. When the first slip rate does not exceed the first set value, it indicates that the rotor speed and the drive gear 33 speed have both stabilized and can maintain normal operation. At this time, starting the hydraulic retarder 3 can avoid power jerking and thus improve the user's driving experience.

[0083] Specifically, the S700 includes:

[0084] S701: Determine whether the first slip rate does not exceed the first set value.

[0085] If yes, then execute S702; otherwise, repeat S400.

[0086] S702: Start hydraulic retarder 3.

[0087] The activation of the hydraulic retarder 3 includes: opening the proportional valve 35 to allow high-pressure gas to enter the housing 31.

[0088] The control method for the hydraulic retarder system provided in this embodiment obtains the control command of the hydraulic retarder 3. When the control command is a start command, the synchronizer 2 is enabled to obtain the rotor speed V11 and the drive gear 33 speed V12, and calculate the first slip rate: first slip rate = (V12-V11) / V12. When the first slip rate does not exceed a first set value, the hydraulic retarder 3 is started. This ensures that when the hydraulic retarder 3 is started, both the rotor speed and the drive gear 33 speed are stable and can maintain normal operation, thereby avoiding power jerking and improving the user's driving experience.

[0089] Optionally, when determining whether the control command is a start command or a stop command in S200, if the control command is a stop command, the control method for the hydraulic retarder system further includes the following steps:

[0090] S800: Synchronizer 2 is disconnected and enabled.

[0091] Specifically, the cylinder 43 drives the shift fork 41 to move on the fork shaft 42, and the shift fork 41 drives the synchronizer 2 to move so that the synchronizer 2 is separated from the drive gear 33, thereby disconnecting the drive gear 33 from the rotor shaft 32.

[0092] S900: Obtain the rotor speed V21.

[0093] S1000: Obtain the rotational speed V22 of the drive gear 33.

[0094] S1100: Calculate the second slip ratio, second slip ratio = (V22-V21) / V22;

[0095] S1200: When the second slip rate exceeds the second set value, shut off the hydraulic retarder 3.

[0096] The second setting value can be set as needed. When the second slip exceeds the second setting value, it indicates that the rotor speed has dropped to a very low value. At this time, turning off the hydraulic retarder 3 can also avoid power jerking, thereby improving the user's driving experience.

[0097] Specifically, S1200 includes:

[0098] S1201: Determine whether the second slip rate exceeds the second set value.

[0099] If yes, then execute S1202; if no, then repeat S900.

[0100] S1202: Close hydraulic retarder 3.

[0101] The process of shutting down the hydraulic retarder 3 includes shutting down the proportional valve 35 to prevent high-pressure gas from entering the housing 31.

[0102] Example 2

[0103] This embodiment provides a control device for a hydraulic retarder system, used to execute the control method for the hydraulic retarder system in Embodiment 1 above.

[0104] Specifically, such as Figure 3 As shown, the control device of the hydraulic retarder system includes: a command acquisition module 100, an engagement enable module 110, a rotor speed acquisition module 120, a drive gear speed acquisition module 130, a first slip ratio calculation module 140, and a start execution module 150. Specifically, the command acquisition module 100 acquires the control command for the hydraulic retarder; when the control command is a start command, the engagement enable module 110 enables synchronizer engagement; the rotor speed acquisition module 120 acquires the rotor speed V11; the drive gear speed acquisition module 130 acquires the drive gear speed V12; the first slip ratio calculation module 140 calculates the first slip ratio; and the start execution module 150 starts the hydraulic retarder when the first slip ratio does not exceed a first set value.

[0105] The control device of the hydraulic retarder system provided in this embodiment acquires the control command of the hydraulic retarder through the command acquisition module 100; when the control command is a start command, it is enabled by the synchronizer through the engagement enable module 110; the rotor speed acquisition module 120 acquires the rotor speed V11; the drive gear speed acquisition module 130 acquires the drive gear speed V12; the first slip rate calculation module 140 calculates the first slip rate; and the start execution module 150 starts the hydraulic retarder when the first slip rate does not exceed the first set value. This ensures that when the hydraulic retarder is started, both the rotor speed and the drive gear speed are stable and can maintain normal operation, thereby avoiding power jerking and improving the user's driving experience.

[0106] Optionally, the control device of the hydraulic retarder system further includes a disconnect enable module 160, a second slip rate calculation module 170, and a shutdown execution module 180. Specifically, the rotor speed acquisition module 120 is used to acquire the rotor speed V21; the drive gear speed acquisition module 130 is used to acquire the drive gear speed V22; when the control command is a shutdown command, the disconnect enable module 160 is used to disconnect the synchronizer; the second slip rate calculation module 170 is used to calculate the second slip rate, where the second slip rate = (V22 - V21) / V22; and the shutdown execution module 180 is used to shut down the hydraulic retarder when the second slip rate exceeds a second set value.

[0107] The control device for the hydraulic retarder system provided in Embodiment 2 of the present invention can be used to execute the control method for the hydraulic retarder system provided in the above embodiments, and has corresponding functions and beneficial effects.

[0108] Example 3

[0109] This embodiment provides a vehicle. The vehicle includes the hydraulic retarder system 200 provided in the above embodiment, and further includes a controller 210, a rotor speed sensor 220, a drive gear speed sensor 230, and a memory 240. The hydraulic retarder system 200, controller 210, rotor speed sensor 220, drive gear speed sensor 230, and memory 240 can be connected via a bus. The rotor speed sensor 220 is used to acquire the rotor speed and send the acquired rotor speed to the controller 210; the drive gear speed sensor 230 is used to acquire the drive gear speed and send the acquired drive gear speed to the controller 210.

[0110] The memory 240, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the control method of the hydraulic retarder system in the embodiments of the present invention. The controller 210 executes various functional applications and data processing of the vehicle by running the software programs, instructions, and modules stored in the memory 240, thereby realizing the control method of the hydraulic retarder system in the above embodiments.

[0111] The memory 240 primarily includes a program storage area and a data storage area. The program storage area stores the operating system and at least one application program required for a given function; the data storage area stores data created based on terminal usage. Furthermore, the memory 240 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 240 may further include memory remotely configured relative to the controller 210, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0112] The vehicle provided in Embodiment 3 of the present invention and the control method of the hydraulic retarder system provided in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments. Furthermore, this embodiment has the same beneficial effects as the control method of the hydraulic retarder system.

[0113] Example 4

[0114] Embodiment 4 of the present invention also provides a storage medium storing a computer program thereon, which, when executed by the vehicle controller, enables the vehicle to implement the control method of the hydraulic retarder system as described in the above embodiments of the present invention.

[0115] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the operations in the control method of the hydraulic retarder system as described above, but can also execute related operations in the control method of the hydraulic retarder system provided in the embodiments of the present invention, and have corresponding functions and beneficial effects.

[0116] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A control method for a hydraulic retarder system, the hydraulic retarder system comprising a transmission, a synchronizer, a hydraulic retarder, and a drive mechanism, wherein the output shaft of the transmission is provided with an input gear, the hydraulic retarder comprises a housing, a rotor shaft rotatably disposed on the housing, a rotor fixedly disposed on the rotor shaft, and a drive gear rotatably disposed on the rotor shaft and meshing with the input gear, the rotor being located inside the housing, the drive gear being located outside the housing, the synchronizer being slidably disposed on the rotor shaft and capable of driving the rotor shaft to rotate synchronously, and the drive mechanism being used to drive the synchronizer to engage or disengage with the drive gear, characterized in that... The control method for the hydraulic retarder system includes: Obtain the control command for the hydraulic retarder, wherein the control command is a start command or a stop command; When the control command is a start command, the synchronizer is enabled to drive the drive gear to the rotor shaft. Obtain the rotor speed V11; Obtain the rotational speed V12 of the drive gear; Calculate the first slip ratio, where the first slip ratio = (V12 - V11) / V12; When the first slip rate does not exceed the first set value, the hydraulic retarder is activated; The control method for the hydraulic retarder system further includes: When the control command obtained for the hydraulic retarder is a shutdown command; The synchronizer is deactivated to disconnect the drive gear from the rotor shaft transmission. Obtain the rotor speed V21; Obtain the rotational speed V22 of the drive gear; Calculate the second slip ratio, which is: second slip ratio = (V22 - V21) / V22; When the second slip exceeds the second set value, the hydraulic retarder is turned off; The housing is provided with a high-pressure gas passage, which is used to connect to an external high-pressure gas source and to deliver high-pressure gas into the housing. The hydraulic retarder also includes a proportional valve for adjusting the opening of the high-pressure gas passage. Activating the hydraulic retarder includes: opening the proportional valve to allow high-pressure gas to enter the housing; Closing the hydraulic retarder includes closing the proportional valve to prevent high-pressure gas from entering the housing.

2. The control method for the hydraulic retarder system according to claim 1, characterized in that, The control commands for obtaining the hydraulic retarder include: The position of the control handle of the hydraulic retarder is obtained. When the handle is in a non-neutral position, the control command is determined to be a start command.

3. The control method for the hydraulic retarder system according to claim 2, characterized in that, When the handle is in the neutral position, the control command is determined to be a shutdown command.

4. A control device for a hydraulic retarder system, used to execute the control method for the hydraulic retarder system according to any one of claims 1-3, characterized in that, A hydraulic retarder system includes a transmission, a synchronizer, a hydraulic retarder, and a drive mechanism. The output shaft of the transmission is equipped with an input gear. The hydraulic retarder includes a housing, a rotor shaft rotatably mounted on the housing, a rotor fixedly mounted on the rotor shaft, and a drive gear rotatably mounted on the rotor shaft and meshing with the input gear. The rotor is located inside the housing, and the drive gear is located outside the housing. The synchronizer is slidably mounted on the rotor shaft and can drive the rotor shaft to rotate synchronously. The drive mechanism is used to drive the synchronizer to engage or disengage from the drive gear. The hydraulic retarder system is characterized by a control device comprising: The instruction acquisition module is used to acquire the control instructions of the hydraulic retarder, wherein the control instructions are start instructions or stop instructions. The combined enable module is used to enable the synchronizer when the control command is a start command, so that the drive gear is connected to the rotor shaft for transmission. A rotor speed acquisition module is used to acquire the rotor speed V11; A drive gear speed acquisition module is used to acquire the speed V12 of the drive gear; The first slip ratio calculation module is used to calculate the first slip ratio, where the first slip ratio = (V12-V11) / V12; The start-up execution module is used to start the hydraulic retarder when the first slip rate does not exceed the first set value.

5. The control device for the hydraulic retarder system according to claim 4, characterized in that, The rotor speed acquisition module is also used to acquire the rotor speed V21; the drive gear speed acquisition module is used to acquire the drive gear speed V22; the control device of the hydraulic retarder system further includes: The enable module is disconnected when the control command is a shutdown command, so as to disconnect the synchronizer from the drive gear and the rotor shaft transmission. The second slip ratio calculation module is used to calculate the second slip ratio, which is: second slip ratio = (V22-V21) / V22; The shutdown execution module is used to shut down the hydraulic retarder when the second slip rate exceeds the second set value.

6. A vehicle comprising a hydraulic retarder system, characterized in that, The vehicle also includes: Controller; A rotor speed sensor is used to acquire the rotor speed and send the acquired rotor speed to the controller; A drive gear speed sensor is used to acquire the speed of the drive gear and send the acquired speed of the drive gear to the controller; Memory, used to store one or more programs; When the controller executes the one or more programs, it causes the controller to control the vehicle to implement the control method of the hydraulic retarder system as described in any one of claims 1-3.

7. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the controller, the vehicle implements the control method of the hydraulic retarder system as described in any one of claims 1-3.

Images