Five-point return type electronic shifter gear control method

Abstract

This invention discloses a gear position control method for a five-point return-type electronic gear shifter, comprising: a transmission control unit sending a current gear position signal to the vehicle bus in real time; a gear shifter controller receiving the current gear position signal sent to the vehicle bus by the transmission control unit; the gear shifter controller obtaining a requested gear position signal according to a preset gear position judgment strategy based on the shift operation signal and the current gear position signal, and sending it to the vehicle bus; and the transmission control unit receiving the requested gear position signal sent to the vehicle bus by the gear shifter controller and performing a gear shift according to the requested gear position signal. This five-point return-type electronic gear shifter gear position control method solves the problem of needing to change the software logic for sending position signals to gear position signals when applying passenger car-style five-point return-type electronic gear shifters in the commercial vehicle field, and also solves the problem of needing to calibrate the gear shifter to match different automatic transmission manufacturers.

Description

Technical Field

[0001] This invention relates to the field of electronic gear shifters for commercial vehicles, and in particular to a gear control method for a five-point return type electronic gear shifter. Background Technology

[0002] With the development of the commercial vehicle market, more and more businesses and users are paying attention to driving comfort, making automatic transmissions a long-awaited feature. Furthermore, with the continuous trend towards high-end commercial vehicles, automatic transmission trucks have become a market trend. However, the current automatic transmission technology in commercial vehicles is still in its early stages. The available automatic transmission shifters are limited in form, have designs that need improvement, and occupy a large space. They mostly use traditional multi-stable electronic shifters, such as serpentine or king-shaped layouts, which cannot meet the development needs of autonomous driving in commercial vehicles. Moreover, to comply with the SAE J1939 protocol for commercial vehicles, these shifters all use multi-stable electronic shifters that transmit gear position signals. In contrast, passenger vehicles currently mainly use two types of stable electronic shifters: five-point return type and position signal type. Passenger vehicle shifters also have a stylish and technologically advanced design, occupy less space, and are highly universal. Therefore, with the customer base becoming younger, the adoption of passenger vehicle-style electronic shifters in commercial vehicles is an inevitable trend, but the issue of different control logics due to different communication protocols and driving conditions needs to be addressed.

[0003] Therefore, there is an urgent need for a gear control method for a five-point return type electronic gear shifter. Summary of the Invention

[0004] The purpose of this invention is to provide a gear control method for a five-point return electronic gear shifter to solve the problems in the prior art. It can solve the problem that the software logic for sending position signals needs to be changed to sending gear signals when applying a passenger car-style five-point return electronic gear shifter in the commercial vehicle field. At the same time, it solves the problem that the gear shifter needs to be calibrated to match different automatic transmission manufacturers.

[0005] This invention provides a gear control method for a five-point return electronic gear shifter, comprising:

[0006] The transmission control unit sends the current gear signal to the vehicle bus in real time.

[0007] The shift controller receives the current gear signal sent from the transmission control unit to the vehicle bus;

[0008] The shifter controller obtains a requested gear signal according to the shift operation signal of the shifter and the current gear signal, and sends it to the vehicle bus according to a preset gear judgment strategy. The shifter is a five-point return type electronic shifter.

[0009] The transmission control unit receives the gear request signal sent to the vehicle bus by the shift controller and performs a gear shift according to the gear request signal.

[0010] The gear position control method for the five-point return electronic gear shifter described above, preferably, involves the shifter controller obtaining a requested gear signal based on the shift operation signal of the shifter and the current gear signal, according to a preset gear judgment strategy, and sending it to the vehicle bus. Specifically, this includes:

[0011] The shifter controller obtains the shifter shifting operation signal based on the signals collected by the second-order position angle Hall sensor and the switch Hall sensor inside the shifter;

[0012] The shifter controller obtains the requested gear signal for different gears and shifting states based on the shifter shifting operation signal and the current gear signal;

[0013] The gear shift controller sends the requested gear signal to the vehicle bus.

[0014] The gear control method for the five-point return type electronic shifter described above, preferably, when the shifter is in the X position and the current gear is R, the shifter controller obtains the requested gear signal for different gears and different shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0015] When the gear lever is on the left, if the gear shifter is pushed forward to the first position, the gear shifter controller determines that the requested gear signal is R gear;

[0016] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is N gear;

[0017] When the gear lever is on the right, when the gear shifter is pushed forward to the second position, the gear shifter controller determines that the requested gear signal is R gear;

[0018] When the gear lever is on the right, when the gear shifter is pushed back to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is D gear.

[0019] When the gear lever is on the right, and the shifter is pushed back to the second position without pressing the unlock button, the shifter controller determines that the requested gear signal is N gear.

[0020] The gear control method for the five-point return type electronic shifter described above, preferably, when the shifter is in position X and the current gear is N, the shifter controller obtains a requested gear signal for different gears and different shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0021] When the gear lever is on the left, if the gear shifter is pushed forward to the first position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is R gear;

[0022] When the gear lever is on the left, if the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is still N gear;

[0023] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is D gear;

[0024] When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is R gear.

[0025] When the gear lever is on the right, and the gear shifter is pushed back to the second position, the gear shifter controller determines that the requested gear signal is D gear.

[0026] The gear control method for the five-point return type electronic shifter described above, preferably, when the shifter is in the X position and the current gear is D, the shifter controller obtains the requested gear signal for different gears and different shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0027] When the gear lever is on the left, if the gear shifter is pushed forward to the first position, the gear shifter controller determines that the gear request signal is intervention + gear.

[0028] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the gear request signal is an intervention-gear signal;

[0029] When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the gear request signal is R gear, and does not send a gear request signal when passing the first position.

[0030] When the gear lever is on the right, and the gear shifter is pushed forward to the second position without pressing the unlock button, the gear shifter controller determines that the requested gear signal is N gear.

[0031] When the gear lever is on the right, and the shifter is pushed back to the second position, the shifter controller determines that the requested gear signal is still D gear.

[0032] The gear control method for the five-point return electronic gear shifter described above, preferably, when the gear shifter is in the E / M position and the current gear is M, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including:

[0033] When the gear lever is moved to the right to the X position, if the current gear is N or R, the shift controller determines that the requested gear signal is still N or R; if the current gear is not N or R, the shift controller determines that the requested gear signal is D.

[0034] When the shifter is in the E / M position and the current gear is D (E mode), the shifter controller obtains the requested gear signal for different gears and shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0035] When the gear lever is moved to the right to the X position, the gear shift controller determines that the requested gear signal is D gear, and the mode remains unchanged.

[0036] The gear control method for the five-point return type electronic shifter described above, preferably, when the shifter is in the X position and the current gear is N / D / R, the shifter controller obtains the requested gear signal for different gears and different shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0037] When the current gear is N and the E / M position is selected to the left, if the unlock button is pressed, the shift controller determines that the requested operating mode is E mode; if the unlock button is not pressed, the shift controller determines that the requested gear signal is unresponsive.

[0038] When the current gear is D and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode.

[0039] When the current gear is R and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode.

[0040] The gear control method for the five-point return electronic shifter described above, preferably, when the shifter is in the E / M position and the current gear is D (E mode), the shifter controller obtains the requested gear signal for different gears and shift states based on the shifter shift operation signal and the current gear signal, specifically including:

[0041] If the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear;

[0042] If the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is M+ and requests to change the gear from D to M.

[0043] If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is an intervention-gear signal;

[0044] If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M- and requests to shift the gear from D to M.

[0045] When the gear shifter is in the E / M position and the current gear is M, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including:

[0046] If the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear, and at the same time requests to change the gear from M to E.

[0047] If the shifter is pushed forward to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M+.

[0048] If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention-gear and requests to change the gear from M to E.

[0049] If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M-gear.

[0050] The gear control method for the five-point return electronic gear shifter described above, preferably, further includes:

[0051] The gear shift controller determines whether to enter second-gear start mode or creep mode based on the gear shift operation signal from the gear shifter, specifically including:

[0052] If the 2nd button is pressed for less than 4 seconds, the shift controller sends a second-gear start signal to the vehicle bus to activate the second-gear start mode.

[0053] If the duration of pressing the 2nd button is greater than or equal to 4 seconds and less than or equal to 5 seconds, the shift controller will not send a signal to the vehicle bus. This time interval is the transition zone.

[0054] If the 2nd button is pressed for more than 5 seconds, the shift controller sends a low-speed creep signal to the vehicle bus to activate the creep mode.

[0055] The gear control method for the five-point return electronic gear shifter described above, preferably, further includes:

[0056] The shift controller determines whether to activate the clutch or gear self-learning function based on the shift operation signal from the shifter, specifically including:

[0057] If the 2nd button and the Unlock button are pressed simultaneously for more than 5 seconds, the clutch self-learning function will be activated.

[0058] If you press the Unlock button and then click the 2nd button three times in succession, the gear self-learning function will be activated.

[0059] This invention provides a gear control method for a five-point return-type electronic gear shifter. The shifter controller performs the gear logic judgment function. When the shifter issues a specific gear or mode request signal, the transmission control unit does not need to add a separate gear logic judgment; it can directly execute the gear or mode switch. This solves the problem of changing the software logic for issuing position signals to the software logic for issuing gear signals when applying passenger car-style five-point return-type electronic gear shifters in the commercial vehicle field. It enables the shifter to adapt to automatic transmissions from different manufacturers under the standard communication protocol for commercial vehicles, without calibration. The method uses the unlock and 2nd button combinations or long presses, as well as the E / M function using the unlock combination to achieve E / P function switching, thus solving the problem of adding function buttons to the shifter panel and affecting universality. (See reference...) Figure 9 and Figure 10 By defining the gear position logic for the shared function of E / M, the problem of the two steady-state five-point return electronic shifter being in M ​​gear when switching from driving in forward gear to manual driving is solved, which prevents it from entering D gear when driving in manual driving. Attached Figure Description

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0061] Figure 1 A schematic diagram of the gear positions of a five-point return type electronic gear shifter;

[0062] Figure 2 A flowchart illustrating an embodiment of the gear control method for a five-point return electronic gear shifter provided by the present invention;

[0063] Figure 3The embodiment of the gear control method of the five-point return type electronic shifter provided by the present invention is shown in the gear judgment logic diagram of the first and second order states of the current R gear when the five-point return type electronic shifter is in the X position.

[0064] Figure 4 The embodiment of the gear control method for the five-point return type electronic shifter provided by the present invention is shown in the gear judgment logic diagram of the five-point return type electronic shifter in the X position, in the first and second order states of the current N gear.

[0065] Figure 5 The embodiment of the gear control method of the five-point return type electronic shifter provided by the present invention is shown in the gear judgment logic diagram of the first and second order states of the current R gear when the five-point return type electronic shifter is in the X position.

[0066] Figure 6 The five-point return type electronic shifter provided by the present invention is shown in the following embodiment of the gear control method: when the five-point return type electronic shifter is in the E / M position, it is in the current M gear and the gear is selected to the right to the X position.

[0067] Figure 7 The five-point return type electronic shifter provided by the present invention is a logic diagram of the gear selection logic when the gear is selected to the right to the X position in the current E mode in the E / M position, according to an embodiment of the gear control method of the five-point return type electronic shifter.

[0068] Figure 8 The embodiment of the gear control method for the five-point return type electronic shifter provided by the present invention is shown in the following diagram: when the five-point return type electronic shifter is in the X position and the gear is selected to the left from the current R / N / D gear to the E / M position;

[0069] Figure 9 The five-point return type electronic shifter, as an embodiment of the gear control method provided by the present invention, is a logic diagram for determining forward or backward gear selection in the current E mode when in the E / M position.

[0070] Figure 10 This is an embodiment of the gear control method for a five-point return type electronic shifter provided by the present invention. The logic diagram for determining whether to move forward or backward in the current M gear when the five-point return type electronic shifter is in the E / M position. Detailed Implementation

[0071] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0072] The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as “including” or “contains” mean that the element preceding the term encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as “above” and “below” are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0073] In this disclosure, when a specific component is described as being located between a first component and a second component, an intermediary component may or may not be present between the specific component and the first or second component. When a specific component is described as connecting to other components, the specific component may be directly connected to the other components without having an intermediary component, or it may not be directly connected to the other components but may have an intermediary component.

[0074] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0075] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0076] Currently, most commercial vehicles use traditional multi-steady-state electronic shifters, such as serpentine and king-shaped shifters, which cannot meet the development needs of autonomous driving in commercial vehicles. Passenger vehicles currently mainly use two types of steady-state electronic shifters: five-point return type and five-point return type. Both of these are electronic shifters that send position signals. The shifter only sends the actual position of the gear, and the TCU determines which gear it is in by receiving the message.

[0077] The gear shifter has an automatic gear slot and a manual gear slot. The automatic gear slot has a five-point self-returning structure with one stable state X and four quasi-stable states (A1, A2, B1, B2). The manual gear slot has a three-point self-returning structure with one stable state M and two quasi-stable states (M+, M-).

[0078] This five-point return-type gear shifter only sends position signals. However, commercial vehicles use the universal communication protocol SAE J1939, in which the TCU explicitly defines the specific position of the gear shifter's gear position signal. This is not conducive to universality and standardization, as it is a custom signal. Moreover, the gear shifter's position signal requires the automatic transmission controller to define the gear position logic, which can lead to different definitions among different transmission manufacturers, affecting the overall universality of the vehicle's functions. Furthermore, some transmission manufacturers in the commercial vehicle sector are unwilling to customize gear position logic judgments because their transmission software is standardized according to the SAE J1939 communication protocol and has platform universality. In addition, additional function modes, such as switching between power economy modes, need to be implemented by adding a button on the center console, affecting universality.

[0079] like Figure 1 As shown, the five-point return type electronic shifter used in this invention has two steady-state positions X and E / M. +, -, A2, A1, B1, and B2 are all non-steady-state positions. Among them, +, -, A1, and A2 are first-order positions, and A2 and B2 are second-order positions. Figures 3-10 In the diagram, circles represent the current gear position of the TCU, triangles represent gear requests from the shifter, with shaded triangles representing second-order gear requests and unshaded triangles representing first-order gear requests; diamonds represent function modes.

[0080] The gear shift knob has function buttons labeled "2nd" (second gear start) and "unlock". The panel above the knob has gear indicator lights, all of which illuminate according to the gear position. When the driver operates the gear shift lever, the GSM (gear shift controller) will transmit the driver's operation information via CAN signal to indicate the gear position: R (reverse), N (neutral), D (autopilot forward), M (manual), + (upshift), - (downshift), No_Request, and Signal Not Available, through periodic messages.

[0081] like Figure 2 As shown, the gear control method of the five-point return type electronic gear shifter provided in this embodiment includes the following steps in actual execution:

[0082] Step S1: The Transmission Control Unit (TCU) sends the current gear signal to the vehicle bus (CAN network) in real time.

[0083] Step S2: The shift controller (GSM) receives the current gear signal sent to the vehicle bus by the transmission control unit (TCU).

[0084] by Figure 4 Taking the gear lever as an example, when the gear lever is on the right, and the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller (GSM) obtains the current gear signal as N gear signal based on the message sent by the transmission control unit (TCU).

[0085] Step S3: The gear shift controller (GSM) obtains a requested gear signal according to the gear shift operation signal of the gear shifter and the current gear signal, and sends it to the vehicle bus according to the preset gear judgment strategy. The gear shifter is a five-point return type electronic gear shifter.

[0086] The shift operation signal of the gear shifter can be an operation request signal issued by the hand knob and the gear lever. As shown in Table 1, this invention defines the message signals sent by the gear shifter controller (GSM) to the vehicle bus under different functions.

[0087] Table 1 Message Signals

[0088]

[0089] In one embodiment of the gear control method of the five-point return type electronic gear shifter of the present invention, step S3 may specifically include:

[0090] Step S31: The shifter controller obtains the shifter shifting operation signal based on the signals collected by the second-order position angle Hall sensor and the switch Hall sensor inside the shifter.

[0091] Step S32: The gear shifter controller obtains the requested gear signal under different shifting states in different gears based on the gear shifter shifting operation signal and the current gear signal.

[0092] Specifically, in some embodiments of the present invention, such as Figure 3 As shown, when the gear shifter is in the X position and the current gear is R, if the gear lever is on the left and the gear shifter is pushed forward to the first position, the gear shifter controller determines that the gear request signal is R, that is, sends 0x00 (No_Request), indicating that the gear status remains unchanged.

[0093] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is N gear;

[0094] When the gear lever is on the right, when the gear shifter is pushed forward to the second position, the gear shifter controller determines that the requested gear signal is R gear;

[0095] When the gear lever is on the right, when the gear shifter is pushed back to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is D gear.

[0096] When the gear lever is on the right, and the shifter is pushed back to the second position without pressing the unlock button, the shifter controller determines that the requested gear signal is N gear.

[0097] In some embodiments of the present invention, such as Figure 4 As shown, when the shifter is in the X position and the current gear is N, and the shift lever is on the left, if the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is R.

[0098] When the gear lever is on the left, if the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is still N gear;

[0099] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is D gear;

[0100] When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is R gear.

[0101] When the gear lever is on the right, and the gear shifter is pushed back to the second position, the gear shifter controller determines that the requested gear signal is D gear.

[0102] In some embodiments of the present invention, such as Figure 5 As shown, when the shifter is in the X position and the current gear is D, if the shifter is pushed forward to the first position when the shift lever is on the left, the shifter controller determines that the requested gear signal is intervention + gear.

[0103] When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the gear request signal is an intervention-gear signal;

[0104] When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the gear request signal is R gear, and does not send a gear request signal when passing the first position.

[0105] When the gear lever is on the right, and the gear shifter is pushed forward to the second position without pressing the unlock button, the gear shifter controller determines that the requested gear signal is N gear.

[0106] When the gear lever is on the right, and the shifter is pushed back to the second position, the shifter controller determines that the requested gear signal is still D gear.

[0107] In some embodiments of the present invention, such as Figure 6 As shown, when the gear shifter is in the E / M position and the current gear is M, if the gear shifter lever is moved to the X position and the current gear is N or R, the gear shifter controller determines that the requested gear signal is still N or R; if the current gear is not N or R, the gear shifter controller determines that the requested gear signal is D.

[0108] In some embodiments of the present invention, such as Figure 7 As shown, when the shifter is in the E / M position and the current gear is D (E mode), when the shifter lever is moved to the X position, the shifter controller determines that the requested gear signal is D (D), and the mode remains unchanged.

[0109] In some embodiments of the present invention, such as Figure 8 As shown, when the gear shifter is in the X position and the current gear is N / D / R, when the current gear is N and the gear is selected to the left to the E / M position, if the unlock button is pressed, the gear shifter controller determines that the requested operating mode is E mode; if the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is unresponsive.

[0110] When the current gear is D and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode.

[0111] When the current gear is R and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode.

[0112] In some embodiments of the present invention, such as Figure 9 As shown, in E mode where the shifter is in the E / M position and the current gear is D, if the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear.

[0113] If the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is M+ and requests to change the gear from D to M.

[0114] If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is an intervention-gear signal;

[0115] If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M- and requests to shift the gear from D to M.

[0116] In some embodiments of the present invention, such as Figure 10 As shown, when the shifter is in the E / M position and the current gear is M, if the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear, and at the same time requests to change the gear from M to E.

[0117] If the shifter is pushed forward to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M+.

[0118] If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention-gear and requests to change the gear from M to E.

[0119] If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M-gear.

[0120] Step S33: The gear shifter controller sends the requested gear signal to the vehicle bus.

[0121] Still with Figure 4 Taking this as an example, the gear shift controller (GSM) determines that the requested gear signal is R gear based on the signals collected by the second-order position angle Hall sensor and the switch Hall sensor in the gear shifter, and sends the R gear request signal to the vehicle bus.

[0122] Step S4: The transmission control unit receives the gear request signal sent to the vehicle bus by the shift controller and performs a gear shift according to the gear request signal.

[0123] Still with Figure 4 Taking this as an example, after the transmission control unit (TCU) receives a request signal for R gear, it controls the shifting to R gear.

[0124] In this invention, the gear shift controller (GSM) does not need to confirm whether the gear request was successful; it only needs to feed back the gear request to the transmission control unit (TCU). The specific gear shift is determined by the transmission control unit (TCU) based on signals such as current vehicle speed and engine speed. Currently, the communication protocol in the commercial vehicle field is the standard SAE J1939, and all automatic transmissions in the commercial vehicle field follow this communication protocol, ensuring the uniformity of the communication protocol. At the same time, the SAE J1939 protocol specifies that the gear shifter PGN is 256, and the signal definition contains specific gear and mode information. When the gear shifter sends a specific gear or mode request signal, the transmission control unit (TCU) does not need to add separate gear logic judgment; it can directly execute the gear shift or mode shift. The specific gear logic judgment function is executed by the gear shift controller (GSM). In this way, different automatic transmissions can be matched, and the gear shifter does not need to be calibrated and can be used directly.

[0125] Furthermore, in some embodiments of the present invention, the gear control method further includes:

[0126] Step S5: The shift controller (GSM) determines whether to enter the second-gear start mode or the creep mode based on the shift operation signal of the shifter.

[0127] In one embodiment of the gear control method of the present invention, step S5 may specifically include:

[0128] Step S51: If the duration of pressing the 2nd button is less than 4 seconds, the shift controller (GSM) sends a second-gear start signal to the vehicle bus to activate the second-gear start mode.

[0129] Step S52: If the duration of pressing the 2nd button is greater than or equal to 4 seconds and less than or equal to 5 seconds, the shift controller will not send a signal to the vehicle bus. This time interval is the transition zone. At this time, the second-gear start mode and crawl mode are not activated.

[0130] Step S53: If the duration of pressing the 2nd button is greater than 5 seconds, the shift controller (GSM) sends a low-speed creep signal to the vehicle bus to activate the creep mode.

[0131] When the driver presses the 2nd button, the GSM will feed back the driver's operation request to the bus via the CAN signal. Whether the driver can enter second gear start or crawl mode is determined by the TCU itself.

[0132] Furthermore, in some embodiments of the present invention, the gear control method further includes:

[0133] Step S6: The gear shift controller (GSM) determines whether to activate the self-learning function of the clutch or gear based on the gear shift operation signal of the gear shifter.

[0134] In one embodiment of the gear control method of the present invention, step S6 may specifically include:

[0135] Step S61: If the 2nd button and the Unlock button are pressed simultaneously for more than 5 seconds, the clutch self-learning function is activated, and the CAN signal of the clutch self-learning is set to 1.

[0136] Step S62: If the Unlock button is pressed and the 2nd button is pressed three times in succession, the gear self-learning function will be activated. At this time, the CAN signal of gear self-learning will be set to 1.

[0137] The gear position control method for a five-point return-type electronic gear shifter provided in this invention involves the gear shifter controller performing the gear position logic judgment function. When the gear shifter issues a specific gear or mode request signal, the transmission control unit does not need to add a separate gear position logic judgment; it can directly execute the gear or mode switch. This solves the problem of changing the software logic for issuing position signals to the software logic for issuing gear signals when applying passenger car-style five-point return-type electronic gear shifters in the commercial vehicle field. It enables the gear shifter to adapt to automatic transmissions from different manufacturers under the standard communication protocol for commercial vehicles, without the need for calibration. By using the unlock and 2nd button combinations or long presses, and by using E / M through the unlock combination to achieve E / P function switching, it solves the problem of adding function buttons to the gear shifter panel, which affects versatility. (See also...) Figure 9 and Figure 10 By defining the gear position logic for the shared function of E / M, the problem of the two steady-state five-point return electronic shifter being in M ​​gear when switching from driving in forward gear to manual driving is solved, which prevents it from entering D gear when driving in manual driving.

[0138] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0139] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A gear control method for a five-point return type electronic gear shifter, characterized in that, include: The transmission control unit sends the current gear signal to the vehicle bus in real time. The shift controller receives the current gear signal sent from the transmission control unit to the vehicle bus; The shifter controller obtains a requested gear signal according to the shift operation signal of the shifter and the current gear signal, and sends it to the vehicle bus according to a preset gear judgment strategy. The shifter is a five-point return type electronic shifter. The transmission control unit receives the gear request signal sent to the vehicle bus by the shift controller, and performs the gear shift according to the gear request signal. The shifter controller, based on the shift operation signal and the current gear signal, and according to a preset gear determination strategy, obtains a requested gear signal and sends it to the vehicle bus, specifically including: The shifter controller obtains the shifter shifting operation signal based on the signals collected by the second-order position angle Hall sensor and the switch Hall sensor inside the shifter; The shifter controller obtains the requested gear signal for different gears and shifting states based on the shifter shifting operation signal and the current gear signal; The gear shift controller sends the requested gear signal to the vehicle bus. When the gear shifter is in the X position and the current gear is R, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: When the gear lever is on the left, if the gear shifter is pushed forward to the first position, the gear shifter controller determines that the requested gear signal is R gear; When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is N gear; When the gear lever is on the right, when the gear shifter is pushed forward to the second position, the gear shifter controller determines that the requested gear signal is R gear; When the gear lever is on the right, when the gear shifter is pushed back to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is D gear. When the gear lever is on the right, and the shifter is pushed back to the second position without pressing the unlock button, the shifter controller determines that the requested gear signal is N gear.

2. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, When the gear shifter is in the X position and the current gear is N, the gear shifter controller obtains a gear request signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: When the gear lever is on the left, if the gear shifter is pushed forward to the first position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is R gear; When the gear lever is on the left, if the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is still N gear; When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the requested gear signal is D gear; When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the requested gear signal is R gear. When the gear lever is on the right, and the gear shifter is pushed back to the second position, the gear shifter controller determines that the requested gear signal is D gear.

3. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, When the gear shifter is in the X position and the current gear is D, the gear shifter controller obtains a gear request signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: When the gear lever is on the left, if the gear shifter is pushed forward to the first position, the gear shifter controller determines that the gear request signal is intervention + gear. When the gear lever is on the left, if the gear shifter is pushed back to the first position, the gear shifter controller determines that the gear request signal is an intervention-gear signal; When the gear lever is on the right, when the gear shifter is pushed forward to the second position and the unlock button is pressed, the gear shifter controller determines that the gear request signal is R gear, and does not send a gear request signal when passing the first position. When the gear lever is on the right, and the gear shifter is pushed forward to the second position without pressing the unlock button, the gear shifter controller determines that the requested gear signal is N gear. When the gear lever is on the right, and the shifter is pushed back to the second position, the shifter controller determines that the requested gear signal is still D gear.

4. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, When the gear shifter is in the E / M position and the current gear is M, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: When the gear lever is moved to the right to the X position, if the current gear is N or R, the shift controller determines that the requested gear signal is still N or R; if the current gear is not N or R, the shift controller determines that the requested gear signal is D. When the shifter is in the E / M position and the current gear is D (E mode), the shifter controller obtains the requested gear signal for different gears and shift states based on the shifter shift operation signal and the current gear signal, specifically including: When the gear lever is moved to the right to the X position, the gear shift controller determines that the requested gear signal is D gear, and the mode remains unchanged.

5. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, When the gear shifter is in the X position and the current gear is N / D / R, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: When the current gear is N and the E / M position is selected to the left, if the unlock button is pressed, the shift controller determines that the requested operating mode is E mode; if the unlock button is not pressed, the shift controller determines that the requested gear signal is unresponsive. When the current gear is D and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode. When the current gear is R and the E / M position is selected to the left, if the unlock button is pressed, the requested operating mode is determined to be E mode, and the gear request signal will not respond; if the unlock button is not pressed, the shift controller determines that the requested gear signal is M mode.

6. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, When the shifter is in the E / M position and the current gear is D (E mode), the shifter controller obtains the requested gear signal for different gears and shift states based on the shifter shift operation signal and the current gear signal, specifically including: If the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear; If the gear shifter is pushed forward to the first position and the unlock button is not pressed, the gear shifter controller determines that the requested gear signal is M+ and requests to change the gear from D to M. If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is an intervention-gear signal; If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M- and requests to shift the gear from D to M. When the gear shifter is in the E / M position and the current gear is M, the gear shifter controller obtains the requested gear signal for different gears and different shift states based on the gear shifter shift operation signal and the current gear signal, specifically including: If the shifter is pushed forward to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention + gear, and at the same time requests to change the gear from M to E. If the shifter is pushed forward to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M+. If the shifter is pushed back to the first position and the unlock button is pressed, the shifter controller determines that the requested gear signal is intervention-gear and requests to change the gear from M to E. If the shifter is pushed back to the first position and the unlock button is not pressed, the shifter controller determines that the requested gear signal is M-gear.

7. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, The gear control method further includes: The gear shift controller determines whether to enter second-gear start mode or creep mode based on the gear shift operation signal from the gear shifter, specifically including: If the 2nd button is pressed for less than 4 seconds, the shift controller sends a second-gear start signal to the vehicle bus to activate the second-gear start mode. If the duration of pressing the 2nd button is greater than or equal to 4 seconds and less than or equal to 5 seconds, the shift controller will not send a signal to the vehicle bus, and the second gear start mode and crawl mode will not be activated. If the 2nd button is pressed for more than 5 seconds, the shift controller sends a low-speed creep signal to the vehicle bus to activate the creep mode.

8. The gear control method for a five-point return electronic gear shifter according to claim 1, characterized in that, The gear control method further includes: The shift controller determines whether to activate the clutch or gear self-learning function based on the shift operation signal from the shifter, specifically including: If the 2nd button and the Unlock button are pressed simultaneously for more than 5 seconds, the clutch self-learning function will be activated. If you press the Unlock button and then click the 2nd button three times in succession, the gear self-learning function will be activated.

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