Hybrid transmission synchronizer protection control method and device and medium

Abstract

The invention relates to a hybrid transmission synchronizer protection control method and device and a medium. The method comprises the following steps: executing a synchronizer protection function action after a synchronizer protection function activation condition is met, and stopping executing the synchronizer protection function action after a synchronizer protection function exit condition is met; the protection function activation condition of the synchronizer is as follows: the hybrid mode is series connection; gear conditions are met; no fault related to action execution exists; the synchronizer protection function exit conditions are as follows: the hybrid mode is pure electric or parallel; the target gear is an N gear or the actual gear is a non-N gear; the function action is executed; a fault related to action execution exists; the gear available range is widened, when a gear engaging command is detected and a large speed difference exists at the two ends of the synchronizer, the design action is executed, the speed difference at the two ends of the synchronizer is effectively reduced, and when the gear engaging action is executed, abrasion to the synchronizer in the synchronizing process is reduced, the synchronizing speed is increased, and synchronizing impact is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid transmissions, and relates to a hybrid transmission synchronizer protection control method, device and medium. Background Art

[0002] Different from the traditional DCT type transmission, the number of gears in modern hybrid transmissions has been greatly reduced. Currently, the most gears in China are three-speed hybrid transmissions. For multi-speed hybrid transmissions with gear changes, the synchronizer execution method has been widely used due to its low cost and mature product technology advantages obtained during the historical stage of DCT widespread application. Figure 1 (in the dotted box) describes the structural position of the synchronizer in the 2-speed hybrid transmission. Figure 2 , Figure 3 Describes the power transmission path under different gears. Figure 4 (In the dotted box) describes the typical application of actuators for key components in hybrid-specific transmissions.

[0003] Due to the structural characteristics of the hybrid-specific transmission, there are a clutch and its actuator in the hybrid system. Manipulating the clutch engagement can increase the speed of the synchronizer input end, reduce the speed difference between the master and slave ends to 0, and expand the allowable range of the synchronizer.

[0004] In order to increase the available gear range, it is necessary to design a control method that can reduce the speed difference at both ends of the synchronizer at high vehicle speeds, reduce the speed difference at both ends of the synchronizer, execute the gear shifting action to reduce the wear of the synchronizer during the synchronization process, increase the synchronization speed, and reduce the synchronization shock. Summary of the invention

[0005] The technical problem to be solved by the present invention is to fill the gap in the prior art. In order to increase the available gear range, a control method is provided to reduce the speed difference at both ends of a high-speed synchronizer. That is, when a gear shift command is detected and there is a large speed difference at both ends of the synchronizer, the designed action is executed to effectively reduce the speed difference at both ends of the synchronizer. At this time, executing the gear shift action again can reduce the wear of the synchronizer during the synchronization process, increase the synchronization speed, and reduce the synchronization shock.

[0006] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0007] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0008] A hybrid transmission synchronizer protection control method includes the following contents:

[0009] After the synchronizer protection function activation condition is met, the synchronizer protection function action is executed, and after the synchronizer protection function exit condition is met, the synchronizer protection function action is stopped.

[0010] Furthermore, the synchronizer protection function activation condition is:

[0011] A hybrid mode is series;

[0012] B satisfies the gear condition;

[0013] C There are no faults related to the execution of the action.

[0014] Furthermore, the gear condition is satisfied by satisfying one of the following conditions:

[0015] aThe actual gear is N, the target gear is 1, and the vehicle speed is greater than 100 kph;

[0016] bThe actual gear is N, the target gear is 2nd, and the vehicle speed is greater than 160kph.

[0017] Furthermore, the absence of faults related to the execution of the action refers to the following conditions being met for all components:

[0018] a. There is no pressure build-up failure in the main oil circuit;

[0019] b. The clutch solenoid valve, gear shifting solenoid valve and main oil circuit solenoid valve are in good condition;

[0020] c. The pressure sensor, temperature sensor and position sensor are all in good condition;

[0021] d. No gear shifting failure;

[0022] e Clutch is fault-free;

[0023] f The vehicle speed signal is faulty.

[0024] Furthermore, the synchronizer protection function exit condition is:

[0025] A hybrid mode is pure electric or parallel;

[0026] B The target gear is N or the actual gear is not N;

[0027] C functional action has been executed;

[0028] D There is a fault related to the execution of the action.

[0029] Furthermore, the failure related to the execution of the action refers to at least one of the following failures:

[0031] a. Main oil circuit pressure build-up failure;

[0032] b. Failure of clutch solenoid valve, gear shifting solenoid valve, and main oil circuit solenoid valve;

[0033] c. The pressure sensor, temperature sensor and position sensor are all faulty;

[0034] d. Failure to shift gears;

[0035] e Clutch failure;

[0036] f Vehicle speed signal fault.

[0037] Further, the synchronizer protection function actions are: action A is executed in sequence;

[0038] Action B is parallel to action A;

[0039] Action A includes:

[0040] A.1 Clutch engagement;

[0041] A.2 Clutch engagement and retention;

[0042] A.3 Clutch disengagement;

[0043] Action B: Adjust the engine speed to the speed corresponding to the target gear through the generator.

[0044] Furthermore, when the synchronizer protection function is activated, the target speed calculation method for the engine speed regulation using the generator is:

[0045] Engine target speed = vs / 3.6 / TireRadius*60 / 2 / pi*GearRatio;

[0046] in:

[0047] vs-vehicle speed, in kph;

[0048] TireRadius-wheel radius, in m;

[0049] pi - pi;

[0050] GearRatio-The speed ratio corresponding to the target gear.

[0051] An apparatus comprising one or more processors;

[0052] A memory for storing one or more programs;

[0053] When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described above.

[0054] A computer-readable storage medium stores a computer program, which implements the method described above when executed by a processor.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] The present invention fills the gap in the prior art and improves the available gear range. When a gear shift command is detected and there is a large speed difference at both ends of the synchronizer, the designed action is executed to effectively reduce the speed difference at both ends of the synchronizer. When the gear shift action is executed, the wear of the synchronizer during the synchronization process is reduced, the synchronization speed is improved, and the synchronization impact is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The present invention will be further described below in conjunction with the accompanying drawings:

[0058] Figure 1 This is a schematic diagram of the structure principle of a 2-speed hybrid transmission;

[0059] Figure 2 This is a schematic diagram of the power transmission path for the 1st gear;

[0060] Figure 3 It is a schematic diagram of the power transmission path of the 2nd gear;

[0061] Figure 4 This is the schematic diagram of the key component actuator;

[0062] Figure 5 It is a schematic diagram of the speed difference range of the synchronizer;

[0063] Figure 6 This is a schematic diagram of the unusable range of the 1st gear synchronous speed difference;

[0064] Figure 7 This is a schematic diagram of the unusable range of the 2nd gear synchronous speed difference;

[0065] Figure 8 This is the synchronizer protection function flow chart;

[0066] Fig. 9 This is the shift control flow chart. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0069] The present invention is described in detail below in conjunction with the accompanying drawings:

[0070] When the following function activation conditions are met, the function action is executed, and when the function exit conditions are met, the actuator function action is stopped. Figure 8 ;

[0071] The synchronizer protection function process is:

[0072] First, determine whether the activation condition is met. If so, perform the synchronizer protection function action; if not, end;

[0073] Then, determine whether the exit condition is met. If so, end the synchronizer protection function action. If not, return to the synchronizer protection function action.

[0074] The position of the synchronizer protection function in the entire shift control process is as follows: Fig. 9 ;

[0075] The entire shift control process is:

[0076] First, determine whether the target gear is equal to the actual gear. If so, end the process; if not, start the synchronizer protection function.

[0077] Then, execute the gear shift action;

[0078] Finally, the end.

[0079] Function activation conditions:

[0080] A hybrid mode is series (S);

[0081] B gear condition (the following conditions are or); Figure 5 ,like Figure 6 ,like Figure 7 ;

[0082] aThe actual gear is N, the target gear is 1, and the vehicle speed is greater than 100 kph;

[0083] b The actual gear is N, the target gear is 2, and the vehicle speed is greater than 160 kph;

[0084] C No faults related to the execution of the action (the following conditions are AND);

[0085] a. There is no pressure build-up failure in the main oil circuit;

[0086] b. The clutch solenoid valve, gear shifting solenoid valve and main oil circuit solenoid valve are in good condition;

[0087] c. The pressure sensor, temperature sensor and position sensor are all in good condition;

[0088] d. No gear shifting failure;

[0089] e Clutch is fault-free;

[0090] f The vehicle speed signal is faulty.

[0091] Function exit condition:

[0092] A hybrid mode is pure electric (EV) or parallel (P);

[0093] B The target gear is N or the actual gear is not N;

[0094] C functional action has been executed;

[0095] D There is a fault related to the execution of the action (the following conditions are or;

[0096] a. Main oil circuit pressure build-up failure;

[0097] b. Failure of clutch solenoid valve, gear shifting solenoid valve, and main oil circuit solenoid valve;

[0098] c. The pressure sensor, temperature sensor and position sensor are all faulty;

[0099] d. Failure to shift gears;

[0100] e Clutch failure;

[0101] f Vehicle speed signal fault.

[0102] Function Action:

[0103] The following actions A are performed in sequence. Action B is performed in parallel with action A;

[0104] A.1 Clutch engagement;

[0105] A.2 Clutch engagement and retention;

[0106] A.3 Clutch disengagement;

[0107] B adjusts the engine speed to the speed corresponding to the target gear through the generator.

[0108] Target speed calculation method: vs / 3.6 / TireRadius*60 / 2 / pi*GearRatio

[0109] in:

[0110] vs-vehicle speed, in kph;

[0111] TireRadius-wheel radius, in m;

[0112] pi - pi;

[0113] GearRatio-The speed ratio corresponding to the target gear.

[0114] Based on the above hybrid transmission synchronizer protection control method, the present invention provides another device, which includes but is not limited to: one or more processors and memories.

[0115] The memory, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions corresponding to the hybrid transmission synchronizer protection control method in the embodiment of the present invention. The processor executes various functional applications and data processing of the vehicle by running the software programs, instructions and modules stored in the memory, that is, realizing the above-mentioned hybrid transmission synchronizer protection control method.

[0116] The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0117] The present invention also provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a hybrid transmission synchronizer protection control method is implemented. The hybrid transmission synchronizer protection control method includes:

[0118] After the synchronizer protection function activation condition is met, the synchronizer protection function action is executed, and after the synchronizer protection function exit condition is met, the synchronizer protection function action is stopped.

[0119] The computer-readable storage medium provided by the present invention has computer-executable instructions that are not limited to the method operations described above, but can also execute related operations in the hybrid transmission synchronizer protection control method provided by any embodiment of the present invention.

[0120] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0121] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center by wired (for example, coaxial cable, optical fiber, digital subscriber line DSL) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrated. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid-state hard disk Solid State Disk, SSD), etc.

[0122] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement and improvement made by any person skilled in the art within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A hybrid transmission synchronizer protection control method, characterized in that: Includes the following: After the synchronizer protection function activation condition is met, the synchronizer protection function action is executed, and after the synchronizer protection function exit condition is met, the synchronizer protection function action is stopped.

2. A hybrid transmission synchronizer protection control method according to claim 1, characterized in that: The synchronizer protection function activation conditions are: A hybrid mode is series; B meets the gear condition; C There are no faults related to the execution of the action.

3. A hybrid transmission synchronizer protection control method according to claim 2, characterized in that: The gear position condition is satisfied by satisfying one of the following conditions: aThe actual gear is N, the target gear is 1, and the vehicle speed is greater than 100 kph; bThe actual gear is N, the target gear is 2nd, and the vehicle speed is greater than 160kph.

4. A hybrid transmission synchronizer protection control method according to claim 2, characterized in that: The absence of faults related to action execution refers to the following conditions being met for all components: a. There is no pressure build-up failure in the main oil circuit; b. The clutch solenoid valve, gear shifting solenoid valve and main oil circuit solenoid valve are in good condition; c. The pressure sensor, temperature sensor and position sensor are all in good condition; d. Failure of shifting or shifting gears; eClutch is fault-free; f The vehicle speed signal is faulty.

5. The hybrid transmission synchronizer protection control method according to claim 1, characterized in that: The exit conditions of the synchronizer protection function are: A hybrid mode is pure electric or parallel; B The target gear is N or the actual gear is not N; C functional action has been executed; D There is a fault related to the execution of the action.

6. A hybrid transmission synchronizer protection control method according to claim 5, characterized in that: The failures related to the execution of the action refer to at least one of the following failures: a. Main oil circuit pressure build-up failure; b. Failure of clutch solenoid valve, gear shifting solenoid valve, and main oil circuit solenoid valve; c. The pressure sensor, temperature sensor and position sensor are all faulty; d. Failure of shifting or shifting gears; eClutch failure; f Vehicle speed signal fault.

7. The hybrid transmission synchronizer protection control method according to claim 1, characterized in that: The synchronizer protection function actions are: action A is executed in sequence; action B is executed in parallel with action A; Action A includes: A.1 Clutch engagement; A.2 Clutch engagement and retention; A.3 Clutch disengagement; Action B: Adjust the engine speed to the speed corresponding to the target gear through the generator.

8. A hybrid transmission synchronizer protection control method according to claim 7, characterized in that: When the synchronizer protection function is activated, the target speed calculation method for the engine speed regulation using the generator is: Engine target speed = vs / 3.6 / TireRadius*60 / 2 / pi*GearRatio; in: vs-vehicle speed, in kph; TireRadius-wheel radius, in m; pi - pi; GearRatio-The speed ratio corresponding to the target gear.

9. A device, characterized in that: comprising one or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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