A map information-based commercial vehicle AMT shifting method, device and system

Abstract

The application belongs to the technical field of automobile transmission, and particularly provides a commercial vehicle AMT gear shifting method, device and system based on map information, the method comprising the following steps: acquiring road longitudinal slope information within a set distance range in front of the vehicle and position information of the vehicle on the current road; confirming the road working condition according to the acquired information; acquiring engine throttle position state information, main brake state information and engine speed, and activating the corresponding pre-gear shifting mode in combination with the road working condition; when the pre-gear shifting mode is activated and the engine speed meets the gear shifting condition, controlling the transmission to gear shift according to the pre-gear shifting mode; when the pre-gear shifting mode is not activated, controlling the transmission to gear shift according to the normal gear shifting mode. The problems of frequent gear shifting and long driving time in low gears are solved, and the fuel economy of the vehicle is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive transmission technology, specifically to a map-based AMT shifting method, device, and system for commercial vehicles. Background Technology

[0002] With the development of science and technology, people are paying more and more attention to vehicle performance, especially in the increasingly competitive commercial vehicle freight industry, where users are placing higher demands on the economy and power of commercial vehicles. Commercial vehicles are also gradually adopting Automated Manual Transmission (AMT) instead of manual transmissions to reduce driver workload. An AMT uses an automatic shift actuator to replace manual operation for gear changes. This actuator includes a shift position sensor, and the TCU (Transmission Control Unit) identifies the shift fork position based on the shift position sensor to determine the vehicle's current gear.

[0003] Currently, vehicles equipped with AMT (Automated Manual Transmission) rely on parameters such as throttle position, vehicle weight, engine speed, road gradient at the vehicle's current location, and the current gear. However, the gradient of the road ahead cannot be determined. In complex hilly and mountainous terrain, the transmission, lacking this information, engages in unnecessary upshifts and downshifts on inclines and declines, resulting in prolonged periods of driving in low gears. This leads to increased fuel consumption and generally poor fuel economy. Summary of the Invention

[0004] This invention provides a method, apparatus, and system for AMT gear shifting in commercial vehicles based on map information, in order to solve the aforementioned technical problems existing in the prior art.

[0005] In a first aspect, the present invention provides a method for AMT gear shifting in commercial vehicles based on map information, comprising the following steps: Obtain longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current position information on the road; The road conditions were confirmed by analyzing the obtained information. Acquire engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode based on road conditions; When the pre-shift mode is activated and the engine speed meets the shifting conditions, the transmission is controlled to shift gears according to the pre-shift mode; when the pre-shift mode is not activated, the transmission is controlled to shift gears according to the normal shifting mode.

[0006] As a preferred embodiment of the technical solution of the present invention, the road conditions in the step of parsing and confirming the road conditions based on the acquired information include: Continuous flat road or continuous downhill, continuous uphill, uphill followed by downhill or flat road, downhill or flat road followed by uphill, flat road followed by uphill, flat road followed by downhill.

[0007] As a preferred embodiment of the technical solution of the present invention, the pre-shifting modes include advance power upshift mode, delayed power upshift mode, delayed power downshift mode, and advance coasting upshift mode.

[0008] As a preferred embodiment of the technical solution of the present invention, the calculation of the target engine speed in each pre-shift mode includes: The upshift adjustment threshold and downshift adjustment threshold are obtained based on the range of the engine throttle position signal value. In the advance upshift mode, the target engine speed for upshifting is the same as the target engine speed n in the normal upshift mode. 正升 The difference between the threshold for adjusting the gear shift; The target engine speed for upshifting in delayed power upshift mode is the same as the target engine speed n for upshifting in normal upshift mode. 正升 The sum of the upshift adjustment threshold; In delayed power downshift mode, the engine speed for downshifting is the same as the engine speed n in normal downshifting mode. 正降 The difference between the downshift adjustment threshold and the threshold value. In the pre-coasting upshift mode, the transmission's upshift target engine speed is a fixed set value.

[0009] As a preferred embodiment of the technical solution of the present invention, the step of calculating the target engine speed in each pre-shift mode further includes: Based on the current vehicle position, road longitudinal slope, accelerator pedal status, vehicle weight, and current transmission gear parameters, calculate the target engine speed n for upshifting in normal transmission upshifting mode. 正升 The engine speed n during downshifting in normal downshifting mode of the transmission 正降 .

[0010] As a preferred embodiment of the technical solution of the present invention, the steps of obtaining engine throttle position status information, main brake status information, and engine speed, and activating the corresponding pre-shift mode in combination with road conditions include: Acquire engine throttle position status information, main brake status information, and engine speed; When the road conditions within the set distance range ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is >0 and the main brake is not activated, the advance power upshift mode in the preshift mode will be activated; When the road condition within a set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, activate the delayed power upshift mode in the preshift mode; When the road conditions within a set distance ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 If the distance between the vehicle and the crest of the hill is L1, based on the longitudinal slope information of the road and the vehicle's current position on the road, the delayed power downshift mode in the preshift mode will be activated; if the distance between the vehicle and the crest of the hill is L2, the advanced power upshift mode in the preshift mode will be activated; where L2 is less than L1 and the difference between L1 and L2 is greater than the set threshold. When the road conditions within a set distance ahead of the vehicle are either downhill or flat followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. When the distance L3 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the delayed power upshift mode in the preshift mode will be activated. When the road conditions within a set distance ahead of the vehicle are first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance L4 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the pre-shift mode of coasting upshift in the pre-shift mode is activated. Otherwise, the pre-shift mode will not be activated.

[0011] As a preferred embodiment of the technical solution of the present invention, the steps of obtaining the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current position information on the road include: The system communicates with the vehicle's driver assistance map module via the CAN bus to obtain information on the longitudinal slope of the road and the vehicle's current location on the road.

[0012] As a preferred embodiment of the technical solution of the present invention, the normal shifting mode is a shifting mode controlled by the throttle, vehicle weight, engine speed, longitudinal slope of the road at the current location of the vehicle, and the current gear of the transmission.

[0013] Secondly, the technical solution of the present invention provides a commercial vehicle AMT shifting device based on map information, including a map information acquisition module, a road condition confirmation module, a mode calculation module and a shifting control module. The map information acquisition module is used to acquire the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current location information on the road; The road condition confirmation module is used to parse and confirm the road condition based on the acquired information. The mode calculation module is used to obtain engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode in combination with road conditions. The shift control module is used to control the transmission to shift gears according to the pre-shift mode when the pre-shift mode is activated and the engine speed meets the shift conditions; when the pre-shift mode is not activated, it controls the transmission to shift gears according to the normal shift mode.

[0014] Thirdly, the technical solution of the present invention provides a commercial vehicle AMT shifting system based on map information, including a driving assistance map module, an accelerator pedal, a brake pedal, an engine ECU, and a transmission TCU; The driver assistance map module, engine ECU, and transmission TCU communicate via a CAN bus; the accelerator pedal, brake pedal, and engine ECU are connected via hard wires. The engine ECU obtains the status of the accelerator pedal and brake pedal via hard wiring and sends it to the transmission TCU via the CAN bus. The driver assistance map module sends the longitudinal slope information of the road at a set distance in front of the vehicle and the vehicle's current position on the road to the transmission TCU via the CAN bus; The transmission TCU obtains the longitudinal slope information of the road within a set distance range ahead of the vehicle and the vehicle's current position information on the road through the CAN bus, and parses it into different road conditions. Based on the different road conditions ahead, and based on the accelerator pedal status, brake pedal status, and engine speed information, different pre-shift modes are activated. When the pre-shift mode is activated, if the engine speed meets the shift conditions, the transmission shifts gears according to the pre-shift mode. If the pre-shift mode is not activated, the normal shift mode is used for shifting.

[0015] As can be seen from the above technical solutions, the present invention has the following advantages: it solves the problems of existing vehicle transmissions in hilly and mountainous road conditions, frequent gear shifting, and long driving time in low gears, thereby improving the fuel economy of the vehicle and thus enhancing the overall product competitiveness of the vehicle.

[0016] Furthermore, the design principle of this invention is reliable, the structure is simple, and it has a very wide range of application prospects.

[0017] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic flowchart of a method according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic block diagram of an apparatus according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic block diagram of a system according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0023] like Figure 1 As shown, this embodiment of the invention provides a method for AMT gear shifting in commercial vehicles based on map information, including the following steps: Step 1: Obtain the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current position information on the road; Step 2: Analyze and confirm the road conditions based on the obtained information; Step 3: Obtain engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode based on road conditions; Step 4: When the pre-shift mode is activated and the engine speed meets the shifting conditions, control the transmission to shift gears according to the pre-shift mode; when the pre-shift mode is not activated, control the transmission to shift gears according to the normal shifting mode.

[0024] It should be noted that, in the embodiments of the present invention, the road conditions include: continuous flat road or continuous downhill, continuous uphill, uphill followed by downhill or flat road, downhill or flat road followed by uphill, flat road followed by uphill, and flat road followed by downhill.

[0025] In this embodiment of the invention, the pre-shifting modes include an early power upshift mode, a delayed power upshift mode, a delayed power downshift mode, and an early coasting upshift mode.

[0026] The calculation of the target engine speed in each pre-shift mode includes: The upshift adjustment threshold and downshift adjustment threshold are obtained based on the range of the engine throttle position signal value. In the advance upshift mode, the target engine speed for upshifting is the same as the target engine speed n in the normal upshift mode. 正升 The difference between the shift adjustment threshold and the shift point; that is, the engine throttle position signal A in the advance power shift mode. 发 >0, the target engine speed for upshifting is the same as the target engine speed n for upshifting in normal upshifting mode. 正升 Based on reducing n offset1 That is, n 提升1 =n 正升 -n 0ffset1 , where n 0ffset1 To ensure calibrability and quantification, the throttle position signal A is assigned different values ​​depending on the throttle position. 发 The value range is 0%-100%, when 0% < A ≤ A1%, n offset1 =n1, when A1%<A≤A2%, n offset1 =n2, when A2%<A≤100%, n offset1 =n 3， Where 0 < A1 < A2 < 100, n1 > n2 > n3 > 0.

[0027] The target engine speed for upshifting in delayed power upshift mode is the same as the target engine speed n for upshifting in normal upshift mode. 正升 The sum of the upshift adjustment threshold; delayed power upshift mode, engine throttle position signal A 发 >0, the target engine speed for upshifting is the same as the target engine speed n for upshifting in normal upshifting mode. 正升 Add n to the basis offset2 That is, n 延升2 =n 正升 +n 0ffset2 , where n 0ffset2 To ensure calibrability and quantification, the throttle position signal A is assigned different values ​​depending on the throttle position. 发 The value range is 0%-100%, and when 0% < A ≤ A3%, n offset2 =n4, when A3%<A≤A4%, n offset2 =n5, when A4%<A≤100%, n offset2 =n 6， Where 0 < A3 < A4 < 100, n4 > n5 > n6 > 0. Here, the upshift adjustment threshold and downshift adjustment threshold are values ​​set based on experience.

[0028] In delayed power downshift mode, the engine speed for downshifting is the same as the engine speed n in normal downshifting mode. 正降 The difference between the downshift adjustment threshold and the delayed power downshift mode, engine throttle position signal A. 发 >0, the engine speed during downshifting is the same as the engine speed n during normal downshifting mode. 正降 Based on reducing n offset3 That is, n 延降3 =n 正降 -n 0ffset3 , where n 0ffset3 To ensure calibrability and quantification, the throttle position signal A is assigned different values ​​depending on the throttle position. 发 The value range is 0%-100%, and when 0% < A ≤ A5%, n offset3 =n7, when A5%<A≤A6%, n offset3 =n8, when A4%<A≤100%, n offset3 =n 9， Where 0 < A5 < A6 < 100, n4 > n5 > n6 > 0.

[0029] In the pre-coasting upshift mode, the target engine speed for upshifting is a fixed set value. That is, in pre-coasting upshift mode, the engine throttle position signal A... 发 =0, main brake activation signal B=0, transmission upshift target engine speed n 滑升4 Change to n 提滑升4 , where n 提升滑4 It is a fixed value.

[0030] In some embodiments, the calculation of the target engine speed in each pre-shift mode further includes: Based on the current vehicle position, road longitudinal slope, accelerator pedal status, vehicle weight, and current transmission gear parameters, calculate the target engine speed n for upshifting in normal transmission upshifting mode. 正升 The engine speed n during downshifting in normal downshifting mode of the transmission 正降 .

[0031] n 正升 =n 挡位 +n 车重 +n 油门 +n 坡度 , where n 挡位 Depending on the different values ​​of the transmission gears 1-m, n can be set to different values. 车重 According to vehicle weight G1-G m Different values ​​for tons can be set to different values, n 油门 Depending on the throttle range of 0%-100%, different values ​​can be set for n. 坡度 According to the slope S1-Sm Different values ​​can be set depending on the size.

[0032] n 正降 =n 挡位 +n 车重 +n 油门 +n 坡度 , where n 挡位 Depending on the different values ​​of the transmission gears 1-m, n can be set to different values. 车重 According to vehicle weight G1-G m Different values ​​for tons can be set to different values, n 油门 Depending on the throttle range of 0%-100%, different values ​​can be set for n. 坡度 According to the slope S1-S m Different values ​​can be set depending on the size.

[0033] In some embodiments, the step of acquiring engine throttle position information, main brake status information, and engine speed, and activating the corresponding pre-shift mode in combination with road conditions, includes: Acquire engine throttle position status information, main brake status information, and engine speed; When the road conditions within the set distance range ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is greater than 0 and the main brake is not activated, the advance power upshift mode in the pre-shift mode will be activated; the transmission will drive in higher gears faster, the transmission efficiency will be higher, and the fuel economy will be better.

[0034] When the road condition within a set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, the delayed power upshift mode in the pre-shift mode will be activated; this reduces unnecessary upshifts of the transmission on uphill sections, thereby reducing downshifts on uphill sections, reducing power loss caused by uphill shifting, and achieving fuel saving.

[0035] When the road conditions within a set distance ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 If the distance to the top of the hill is greater than 0 and the main brake is not activated, the delayed power downshift mode in the pre-shift mode will be activated when the distance to the top of the hill is determined to be L1 based on the longitudinal slope information of the road and the vehicle's current position on the road. This reduces the probability of the transmission downshifting when approaching the top of the hill and then upshifting after the uphill is completed, thereby reducing unnecessary gear shifts and achieving fuel savings. When the distance to the top of the hill is L2, the early power upshift mode in the pre-shift mode will be activated. L2 is less than L1 and the difference between L1 and L2 is greater than a set threshold. This allows the transmission to engage higher gears earlier, resulting in higher transmission efficiency and better fuel economy.

[0036] When the road conditions within a set distance ahead of the vehicle are either downhill or flat followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. When the distance L3 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's current position on the road, the delayed power upshift mode in the pre-shift mode is activated; this reduces unnecessary downshifting of the transmission when going uphill, thereby reducing power loss caused by shifting.

[0037] When the road conditions within a set distance ahead of the vehicle are first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance L4 from the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the pre-shift mode of coasting upshift is activated; the transmission travels faster in higher gears and the transmission efficiency is higher.

[0038] Otherwise, the pre-shift mode will not be activated.

[0039] When the pre-shift mode is activated, the transmission will shift gears according to the pre-shift mode when the engine speed meets the shift conditions. If the pre-shift mode is not activated, the transmission will shift gears according to the normal shift mode.

[0040] In some embodiments, the steps of obtaining the longitudinal slope information of the road within a predetermined distance range in front of the vehicle and the vehicle's current position information on the road include: The system communicates with the vehicle's driver assistance map module via the CAN bus to obtain information on the longitudinal slope of the road and the vehicle's current location on the road.

[0041] Normal shifting mode is based on throttle, vehicle weight, engine speed, road longitudinal slope at the vehicle's current location, and the shifting mode controlled by the current gear of the transmission.

[0042] like Figure 2 As shown, this embodiment of the invention provides a commercial vehicle AMT shifting device based on map information, including a map information acquisition module, a road condition confirmation module, a mode calculation module, and a shifting control module; The map information acquisition module is used to acquire the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current location information on the road; The road condition confirmation module is used to parse and confirm the road condition based on the acquired information. The mode calculation module is used to obtain engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode in combination with road conditions. The shift control module controls the transmission to shift gears according to the pre-shift mode when the pre-shift mode is activated and the engine speed meets the shift conditions; when the pre-shift mode is not activated, it controls the transmission to shift gears according to the normal shift mode. Specifically, it acquires engine throttle position information, main brake status information, and engine speed; when the road conditions within a set distance ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is >0 and the main brake is not activated, the pre-shift mode in the pre-shift mode will be activated; the transmission will move to higher gears faster, resulting in higher transmission efficiency and better fuel economy. When the road condition within the set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, the delayed power upshift mode in the pre-shift mode will be activated; this reduces unnecessary upshifts by the transmission on inclines, thereby reducing downshifts on inclines and reducing power loss caused by uphill shifting, thus achieving fuel saving. When the road conditions within the set distance range ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 When the distance to the top of the hill is greater than 0 and the main brake is not activated, based on the road longitudinal slope information and the vehicle's current position information, if the distance to the top of the hill is determined to be L1, the delayed power downshift mode in the pre-shift mode is activated. This reduces the probability of the transmission downshifting when approaching the top of the hill and then upshifting after the uphill is over, thereby reducing unnecessary gear shifts and achieving fuel saving. When the distance to the top of the hill is L2, the early power upshift mode in the pre-shift mode is activated; where L2 is less than L1 and the difference between L1 and L2 is greater than a set threshold, the transmission engages higher gears earlier, resulting in higher transmission efficiency and better fuel economy. When the road conditions within the set distance range ahead of the vehicle are either downhill or flat road followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. Based on road longitudinal slope information and the vehicle's current position on the road, when the distance L3 from the bottom of the slope is determined, the delayed power upshift mode in the pre-shift mode is activated; this reduces unnecessary downshifting of the transmission on uphill sections, thereby reducing power loss caused by shifting. When the road condition within the set distance range ahead of the vehicle is first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance from the vehicle to the bottom of the slope is determined to be L4 based on the road longitudinal slope information and the vehicle's current position on the road, the pre-shift mode of coasting upshifting in the pre-shift mode is activated; the transmission travels in higher gears faster, resulting in higher transmission efficiency. Otherwise, the pre-shift mode will not be activated.

[0043] like Figure 3 As shown, this embodiment of the invention provides a map-based AMT shifting system for commercial vehicles, including a driver assistance map module, an accelerator pedal, a brake pedal, an engine ECU, and a transmission TCU; The driver assistance map module, engine ECU, and transmission TCU communicate via a CAN bus; the accelerator pedal, brake pedal, and engine ECU are connected via hard wiring. The engine ECU obtains the status of the accelerator pedal and brake pedal via hard wiring and sends it to the transmission TCU via the CAN bus. The driver assistance map module sends the longitudinal slope information of the road at a set distance in front of the vehicle and the vehicle's current position on the road to the transmission TCU via the CAN bus; The transmission TCU obtains longitudinal slope information of the road within a set distance range ahead of the vehicle and the vehicle's current position on the road via the CAN bus, and parses it into different road conditions. Based on these different road conditions, and according to the accelerator pedal state, brake pedal state, and engine speed information, it activates different pre-shift modes. When a pre-shift mode is activated, and the engine speed meets the shifting conditions, the transmission shifts gears according to the pre-shift mode. If the pre-shift mode is not activated, it shifts gears according to the normal shift mode. When the driver is driving on highways, national roads, or other roads within the driving assistance map database, the transmission TCU receives longitudinal slope information of the road ahead (N kilometers ahead) and the vehicle's current position on the road from the driving assistance map. Based on the driver's accelerator and brake pedal states, it automatically calculates and enters different pre-shift modes, thus controlling the transmission gears. The specific shifting method is as described in the above embodiment.

[0044] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A method for AMT gear shifting in commercial vehicles based on map information, characterized in that, Includes the following steps: Obtain longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current position information on the road; The road conditions were confirmed by analyzing the obtained information. Acquire engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode based on road conditions; When the pre-shift mode is activated and the engine speed meets the shifting conditions, the transmission is controlled to shift gears according to the pre-shift mode; when the pre-shift mode is not activated, the transmission is controlled to shift gears according to the normal shifting mode. Among them, the pre-shift modes include advance power upshift mode, delayed power upshift mode, delayed power downshift mode, and advance coasting upshift mode; The steps for obtaining engine throttle position status information, main brake status information, and engine speed, and then activating the corresponding pre-shift mode based on road conditions, include: Acquire engine throttle position status information, main brake status information, and engine speed; When the road conditions within the set distance range ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is >0 and the main brake is not activated, the advance power upshift mode in the preshift mode will be activated; When the road condition within a set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, activate the delayed power upshift mode in the preshift mode; When the road conditions within a set distance ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 If the distance between the vehicle and the crest of the hill is L1, based on the longitudinal slope information of the road and the vehicle's current position on the road, the delayed power downshift mode in the preshift mode will be activated; if the distance between the vehicle and the crest of the hill is L2, the advanced power upshift mode in the preshift mode will be activated; where L2 is less than L1 and the difference between L1 and L2 is greater than the set threshold. When the road conditions within a set distance ahead of the vehicle are either downhill or flat followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. When the distance L3 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the delayed power upshift mode in the preshift mode will be activated. When the road conditions within a set distance ahead of the vehicle are first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance L4 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the pre-shift mode of coasting upshift in the pre-shift mode is activated. Otherwise, the pre-shift mode will not be activated.

2. The AMT shifting method for commercial vehicles based on map information according to claim 1, characterized in that, The road conditions identified in the step of parsing and confirming road conditions based on the acquired information include: Continuous flat road or continuous downhill, continuous uphill, uphill followed by downhill or flat road, downhill or flat road followed by uphill, flat road followed by uphill, flat road followed by downhill.

3. The AMT shifting method for commercial vehicles based on map information according to claim 2, characterized in that, The calculation of the target engine speed in each pre-shift mode includes: The upshift adjustment threshold and downshift adjustment threshold are obtained based on the range of the engine throttle position signal value. In the advance upshift mode, the target engine speed for upshifting is the same as the target engine speed n in the normal upshift mode. 正升 The difference between the threshold for adjusting the gear shift; The target engine speed for upshifting in delayed power upshift mode is the same as the target engine speed n for upshifting in normal upshift mode. 正升 The sum of the upshift adjustment threshold; In delayed power downshift mode, the engine speed for downshifting is the same as the engine speed n in normal downshifting mode. 正降 The difference between the downshift adjustment threshold and the threshold value. In the pre-coasting upshift mode, the transmission's upshift target engine speed is a fixed set value.

4. The AMT shifting method for commercial vehicles based on map information according to claim 3, characterized in that, The calculation steps for the target engine speed in each pre-shift mode also include: Based on the current vehicle position, road longitudinal slope, accelerator pedal status, vehicle weight, and current transmission gear parameters, calculate the target engine speed n for upshifting in normal transmission upshifting mode. 正升 The engine speed n during downshifting in normal downshifting mode of the transmission 正降 .

5. The AMT shifting method for commercial vehicles based on map information according to claim 3, characterized in that, The steps for obtaining the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current position on the road include: The system communicates with the vehicle's driver assistance map module via the CAN bus to obtain information on the longitudinal slope of the road and the vehicle's current location on the road.

6. The AMT shifting method for commercial vehicles based on map information according to claim 3, characterized in that, Normal shifting mode is based on throttle, vehicle weight, engine speed, road longitudinal slope at the vehicle's current location, and the shifting mode controlled by the current gear of the transmission.

7. A map-based AMT shifting device for commercial vehicles, characterized in that, It includes a map information acquisition module, a road condition confirmation module, a mode calculation module, and a gear shift control module; The map information acquisition module is used to acquire the longitudinal slope information of the road within a set distance range in front of the vehicle and the vehicle's current location information on the road; The road condition confirmation module is used to parse and confirm the road condition based on the acquired information. The mode calculation module is used to obtain engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode in combination with road conditions. The shift control module is used to control the transmission to shift gears according to the pre-shift mode when the pre-shift mode is activated and the engine speed meets the shift conditions; when the pre-shift mode is not activated, it controls the transmission to shift gears according to the normal shift mode. Among them, the pre-shift modes include advance power upshift mode, delayed power upshift mode, delayed power downshift mode, and advance coasting upshift mode; Acquire engine throttle position status information, main brake status information, and engine speed, and activate the corresponding pre-shift mode based on road conditions, including: Acquire engine throttle position status information, main brake status information, and engine speed; When the road conditions within the set distance range ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is >0 and the main brake is not activated, the advance power upshift mode in the preshift mode will be activated; When the road condition within a set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, activate the delayed power upshift mode in the preshift mode; When the road conditions within a set distance ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 If the distance between the vehicle and the crest of the hill is L1, based on the longitudinal slope information of the road and the vehicle's current position on the road, the delayed power downshift mode in the preshift mode will be activated; if the distance between the vehicle and the crest of the hill is L2, the advanced power upshift mode in the preshift mode will be activated; where L2 is less than L1 and the difference between L1 and L2 is greater than the set threshold. When the road conditions within a set distance ahead of the vehicle are either downhill or flat followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. When the distance L3 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the delayed power upshift mode in the preshift mode will be activated. When the road conditions within a set distance ahead of the vehicle are first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance L4 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the pre-shift mode of coasting upshift in the pre-shift mode is activated. Otherwise, the pre-shift mode will not be activated.

8. A map-based AMT (Automated Manual Transmission) shifting system for commercial vehicles, characterized in that, This includes a driver assistance map module, accelerator pedal, brake pedal, engine ECU, and transmission TCU; The driver assistance map module, engine ECU, and transmission TCU communicate via a CAN bus; The accelerator pedal, brake pedal and engine ECU are connected by hard wiring; The engine ECU obtains the status of the accelerator pedal and brake pedal via hard wiring and sends it to the transmission TCU via the CAN bus. The driver assistance map module sends the longitudinal slope information of the road at a set distance in front of the vehicle and the vehicle's current position on the road to the transmission TCU via the CAN bus; The transmission TCU obtains the longitudinal slope information of the road within a set distance range ahead of the vehicle and the vehicle's current position information on the road through the CAN bus, and parses it into different road conditions; according to the different road conditions ahead, and according to the accelerator pedal status, brake pedal status, and engine speed information, it activates different pre-shift modes. When the pre-shift mode is activated, the transmission shifts gears according to the pre-shift mode when the engine speed meets the shift conditions. If the pre-shift mode is not activated, the transmission shifts gears according to the normal shift mode. Among them, the pre-shift modes include advance power upshift mode, delayed power upshift mode, delayed power downshift mode, and advance coasting upshift mode; Depending on the different road conditions ahead, and based on the status of the accelerator pedal, brake pedal, and engine speed, different pre-shift modes are activated, including: Acquire engine throttle position status information, main brake status information, and engine speed; When the road conditions within the set distance range ahead of the vehicle are flat or continuously downhill, the engine throttle position signal A... 发 When the value is >0 and the main brake is not activated, the advance power upshift mode in the preshift mode will be activated; When the road condition within a set distance range ahead of the vehicle is a continuous uphill slope, the engine throttle position signal A... 发 If the value is greater than 0 and the main brake is not activated, activate the delayed power upshift mode in the preshift mode; When the road conditions within a set distance ahead of the vehicle are either uphill followed by downhill or flat, the engine throttle position signal A... 发 If the distance between the vehicle and the crest of the hill is L1, based on the longitudinal slope information of the road and the vehicle's current position on the road, the delayed power downshift mode in the preshift mode will be activated; if the distance between the vehicle and the crest of the hill is L2, the advanced power upshift mode in the preshift mode will be activated; where L2 is less than L1 and the difference between L1 and L2 is greater than the set threshold. When the road conditions within a set distance ahead of the vehicle are either downhill or flat followed by uphill, the engine throttle position signal A... 发 >0, main brake not activated. When the distance L3 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the delayed power upshift mode in the preshift mode will be activated. When the road conditions within a set distance ahead of the vehicle are first downhill and then flat, the engine throttle position signal A... 发 =0, main brake not activated. When the distance L4 between the vehicle and the bottom of the slope is determined based on the longitudinal slope information of the road and the vehicle's position on the current road, the pre-shift mode of coasting upshift in the pre-shift mode is activated. Otherwise, the pre-shift mode will not be activated.

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