Control method for reducing oil consumption of commercial vehicle
By adopting the automatic switching strategy of throttle-speed torque MAP and throttle filtering MAP in commercial vehicles, combining altitude, speed and road surface information, the problem of high fuel consumption in commercial vehicles is solved, multi-power switching and adaptive filtering are realized, and the Fuel-saving and driving safety.
Patent Information
- Application Number
- CN202411317841.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-10
AI Technical Summary
Commercial vehicles have high fuel consumption during transportation, resulting in an increase in energy consumption. There is a lack of effective methods to reduce fuel consumption, which affects energy security and environmental protection.
The torque MAP and throttle filtering MAP of multiple throttle-speeds are adopted, combining vehicle altitude information, speed, acceleration and road surface flatness, and the corresponding torque and throttle strategy are automatically switched to achieve multi-power switching and adaptive filtering to reduce fuel consumption.
Through intelligent matching torque and throttle strategies, the vehicle's fuel-saving effect under different loads and road conditions is achieved, driving safety and comfort are improved, and fuel consumption is reduced, avoiding fuel consumption and safety hazards when sliding in the neutral gear in traditional methods.
Smart Images
Figure CN119102896A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of new energy commercial vehicles, and in particular to a control method for reducing fuel consumption of a commercial vehicle. Background Art
[0002] With the development of economy, the number of commercial vehicles has increased and the popularity of family cars, people have higher demands for travel, cargo, transportation and logistics. They are paying more and more attention to the energy consumption, low carbon, safety and comfort of vehicles. Low-carbon and environmentally friendly transportation methods are the common needs of the country and users. Reducing fuel consumption is the most direct way to reduce emissions. Vigorously developing methods to reduce fuel consumption has played an important role in my country's energy security and economic construction. Summary of the invention
[0003] The present application provides a control method for reducing fuel consumption of a commercial vehicle to at least solve one technical problem existing in the related art.
[0004] According to one aspect of an embodiment of the present application, a control method for reducing fuel consumption of a commercial vehicle is provided, comprising a plurality of throttle-speed torque MAPs and a plurality of throttle filter MAPs;
[0005] Obtain vehicle altitude information, vehicle speed information, required torque, vehicle acceleration, and road surface smoothness at a preset distance in front of the vehicle;
[0006] Selecting the throttle-speed torque MAP according to the vehicle altitude information, vehicle speed information, required torque, and vehicle acceleration;
[0007] The throttle filter MAP is selected according to the road surface smoothness at a preset distance in front of the vehicle and the vehicle speed information.
[0008] As an optional implementation, it also includes: determining the difference in vehicle altitude between a first moment and a second moment; determining the size relationship between the vehicle altitude difference and a preset maximum altitude difference and a preset minimum altitude difference to obtain a vehicle altitude signal; respectively determining a first vehicle speed at the first moment and a second vehicle speed at the second moment; determining whether the first vehicle speed and the second vehicle speed meet preset conditions; when the first vehicle speed and the second vehicle speed meet preset conditions, determining a torque deviation within a first time period from the first moment to the second moment; determining whether the torque deviation is less than a preset value of the torque deviation; if the torque deviation is less than the preset value of the torque deviation, determining the size relationship between the whole vehicle acceleration and the preset value of the acceleration to obtain an acceleration signal; and selecting the throttle-speed torque MAP according to the vehicle altitude signal and the acceleration signal.
[0009] As an optional implementation, the preset conditions include: the first vehicle speed is less than the lowest vehicle speed within a first time period from the first moment to the second moment, and the second vehicle speed is greater than the highest vehicle speed within the first time period; wherein the first moment is before the second moment.
[0010] As an optional implementation, if the torque deviation is less than the torque deviation preset value, the magnitude relationship between the vehicle acceleration and the acceleration preset value is determined, and the acceleration signal obtained includes: when the vehicle acceleration is less than the first acceleration preset value, a first acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the first acceleration preset value and less than the second acceleration preset value, a second acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the second acceleration preset value and less than the third acceleration preset value, a third acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the third acceleration preset value, a fourth acceleration signal is obtained.
[0011] As an optional implementation, the maximum torques of the multiple throttle-speed torque MAPs are increased in sequence, wherein the maximum vehicle engine torque is equal to the maximum engine torque.
[0012] As an optional implementation manner, when the first vehicle speed and the second vehicle speed reach preset conditions, a torque MAP including a throttle-speed value of the maximum torque of the engine is selected when the engine is initially operated.
[0013] As an optional implementation, it includes: obtaining the road surface flatness at a preset distance from the front of the vehicle; determining the relationship between the road surface flatness and a preset maximum flatness value and a preset minimum flatness value; outputting a road surface flatness signal according to the relationship between the road surface flatness and the preset maximum flatness value and the preset minimum flatness value; obtaining the vehicle speed; determining the relationship between the vehicle speed and a preset speed value; and selecting a throttle filter MAP according to the road surface flatness signal and the relationship between the vehicle speed and the preset speed value.
[0014] As an optional implementation, the selecting of the throttle filter MAP based on the road roughness signal and the vehicle speed signal includes: if the vehicle speed is less than or equal to the preset speed value, selecting the throttle filter MAP using a first preset logic; if the vehicle speed is greater than the preset speed value, selecting the throttle filter MAP using a second preset logic.
[0015] As an optional implementation, it also includes obtaining the driving state of the vehicle; determining whether the vehicle enters the in-gear coasting state; if the vehicle enters the in-gear coasting state, the vehicle controller stops electrically injecting fuel to the engine injector.
[0016] As an optional implementation, if the vehicle enters the in-gear gliding state, determine whether the throttle opening is 0; if the throttle opening is 0, determine the vehicle altitude difference between the third moment and the fourth moment; determine whether the vehicle altitude difference is greater than a preset maximum altitude; if the vehicle altitude difference is greater than the preset maximum altitude, output a signal to remind the driver that the vehicle is in gear.
[0017] In an embodiment of the present application, a control method for reducing fuel consumption of commercial vehicles is provided, including multiple throttle-speed torque MAPs and multiple throttle filter MAPs; obtaining vehicle altitude information, vehicle speed information, required torque, vehicle acceleration, and road surface flatness at a preset distance in front of the vehicle; selecting the throttle-speed torque MAP according to the vehicle altitude information, vehicle speed information, required torque, and vehicle acceleration; selecting the throttle filter MAP according to the road surface flatness at a preset distance in front of the vehicle and the vehicle speed information. Automatically and intelligently switch the corresponding torque MAP according to different loads to achieve the purpose of multi-power switching and fuel saving; switch the throttle filter MAP to adapt to the corresponding road conditions to reduce the difficulty of vehicle control, making the vehicle more stable and more fuel-efficient; when the vehicle is coasting on a long slope, the logic is changed to ensure driving safety without neutral gear, while achieving the purpose of reducing fuel consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0020] Figure 1 It is a flow chart of a control method for reducing fuel consumption of a commercial vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION
[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0023] like Figure 1 As shown, the embodiment of the present application provides a control method for reducing fuel consumption of a commercial vehicle, including multiple throttle-speed torque MAPs and multiple throttle filter MAPs;
[0024] S1 obtains vehicle altitude information, vehicle speed information, required torque, vehicle acceleration, and road surface flatness at a preset distance in front of the vehicle;
[0025] S2 selects the throttle-speed torque MAP according to the vehicle altitude information, vehicle speed information, required torque and vehicle acceleration;
[0026] S3 selects the throttle filter MAP according to the road surface smoothness at a preset distance in front of the vehicle and the vehicle speed information.
[0027] Specifically, four throttle-speed torque MAPs P1, P2, P3, and P4 can be set. The engine uses the P4 throttle-speed torque MAP for initial operation; MAP maximum torque setting: P1<P2<P3<P4; the maximum torque in P4 is the maximum torque of the engine, engine power: P=N×M÷9550, where: P is the engine power, N is the engine speed, and M is the engine speed. If N in P4 is the rated speed of the engine, and M is the maximum torque at the rated speed, then the highway P is the rated power of the engine at this time; the maximum torque corresponding to the rated speed of the remaining P1, P2, and P3 cannot reach the rated power of the engine when calculated.
[0028] The corresponding torque MAP is automatically and intelligently switched according to different loads to achieve the purpose of multi-power switching and fuel saving; the throttle filter MAP is switched to adapt to the corresponding road conditions to reduce the difficulty of vehicle control, making the vehicle more stable and fuel-efficient; when the vehicle is coasting on a long slope, the logic is changed to ensure driving safety without shifting to neutral gear, while achieving the purpose of reducing fuel consumption.
[0029] As an optional implementation, it also includes: determining the difference in vehicle altitude between a first moment and a second moment; determining the size relationship between the vehicle altitude difference and a preset maximum altitude difference and a preset minimum altitude difference to obtain a vehicle altitude signal; respectively determining a first vehicle speed at the first moment and a second vehicle speed at the second moment; determining whether the first vehicle speed and the second vehicle speed meet preset conditions; when the first vehicle speed and the second vehicle speed meet preset conditions, determining a torque deviation within a first time period from the first moment to the second moment; determining whether the torque deviation is less than a preset value of the torque deviation; if the torque deviation is less than the preset value of the torque deviation, determining the size relationship between the whole vehicle acceleration and the preset value of the acceleration to obtain an acceleration signal; and selecting the throttle-speed torque MAP according to the vehicle altitude signal and the acceleration signal.
[0030] Exemplarily, the vehicle controller sends a request message to the vehicle terminal, and the vehicle terminal collects altitude information h through its own GPS, intercepts the altitude h1 at time t1 and the altitude h2 at time t2, and calculates the altitude difference: △h=h2-h1. The vehicle terminal sends △h to the vehicle controller; the vehicle controller sets the altitude difference thresholds: H1, H2. Among them, H1 is negative and H2 is positive; the vehicle controller calculates the altitude threshold: when △h-H1≤0, select 1 from the altitude threshold calculation result in the following throttle-speed torque MAP selection switching table; when △h-H1>0, 〡△h〡-H2≤0, select 2 from the altitude threshold calculation result in the following throttle-speed torque MAP selection switching table; when △h-H2>0, select 3 from the altitude threshold calculation result in the following throttle-speed torque MAP selection switching table.
[0031] As an optional implementation, the preset conditions include: the first vehicle speed is less than the lowest vehicle speed within a first time period from the first moment to the second moment, and the second vehicle speed is greater than the highest vehicle speed within the first time period; wherein the first moment is before the second moment.
[0032] As an optional implementation, if the torque deviation is less than the torque deviation preset value, the magnitude relationship between the vehicle acceleration and the acceleration preset value is determined, and the acceleration signal obtained includes: when the vehicle acceleration is less than the first acceleration preset value, a first acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the first acceleration preset value and less than the second acceleration preset value, a second acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the second acceleration preset value and less than the third acceleration preset value, a third acceleration signal is obtained; when the vehicle acceleration is greater than or equal to the third acceleration preset value, a fourth acceleration signal is obtained.
[0033] Similarly, the vehicle instrument sends the vehicle speed V in real time to the vehicle controller, and the vehicle controller captures the vehicle speed V1 at time t1 and the vehicle speed V2 at time t2. The vehicle controller determines the maximum vehicle speed and the minimum vehicle speed in the first time period between t1 and t2 and the size of V1 and V2: when V1 is greater than the maximum vehicle speed in the first time period, or V2 is less than the minimum vehicle speed in the first time period, it is determined that the preset condition is not met; when V1 is less than the minimum vehicle speed in the first time period, and V2 is greater than the maximum vehicle speed in the first time period, it is determined that the preset condition is met. Conditions; after meeting the preset conditions, the engine vehicle controller intercepts the minimum required torque M1 and the maximum required torque M2 within the first time period, and the vehicle controller calculates the torque deviation percentage △M: △M = (M2-M1) ÷ (t2-t1) / (M1+M2) ÷ 2 × 100% The vehicle controller sets the torque deviation threshold: m; The vehicle controller compares M and the threshold m in real time: when Mm>0, the condition for switching the "throttle-speed torque MAP" is not triggered until Mm<0 triggers the condition for switching the "throttle-speed torque MAP".
[0034] The conditions for switching the "throttle-speed torque MAP" can be:
[0035] Calculate the vehicle acceleration a; a = (V2-V1) / (t2-t1); the vehicle controller sets the vehicle acceleration thresholds: A1, A2, A3;
[0036] The vehicle controller calculates the vehicle acceleration threshold: when a-A1<0, select 1 from the vehicle acceleration threshold calculation result in the following throttle-speed torque MAP selection switching table;
[0037] When a-A1≥0, a-A2<0, select 2 from the vehicle acceleration threshold calculation result in the following throttle-speed torque MAP selection switching table;
[0038] When a-A2≥0, a-A3<0, select 3 from the vehicle acceleration threshold calculation result in the following throttle-speed torque MAP selection switching table;
[0039] When a-A3≥0, select 4 from the vehicle acceleration threshold calculation result in the following throttle-speed torque MAP selection switching table;
[0040] After determining the calculation results of the altitude threshold and the vehicle acceleration threshold, the throttle-speed torque MAP that needs to be selected under the current working condition can be determined through the following throttle-speed torque MAP selection switching table.
[0041] Table 1 Throttle-speed torque MAP selection switching table
[0042]
[0043] As an optional implementation, the maximum torques of the multiple throttle-speed torque MAPs are increased in sequence, wherein the maximum vehicle engine torque is equal to the maximum engine torque.
[0044] As an optional implementation manner, when the first vehicle speed and the second vehicle speed reach preset conditions, a torque MAP including a throttle-speed value of the maximum torque of the engine is selected when the engine is initially operated.
[0045] As an optional implementation, it includes: obtaining the road surface flatness at a preset distance from the front of the vehicle; determining the relationship between the road surface flatness and a preset maximum flatness value and a preset minimum flatness value; outputting a road surface flatness signal according to the relationship between the road surface flatness and the preset maximum flatness value and the preset minimum flatness value; obtaining the vehicle speed; determining the relationship between the vehicle speed and a preset speed value; and selecting a throttle filter MAP according to the road surface flatness signal and the relationship between the vehicle speed and the preset speed value.
[0046] As an optional implementation, the selecting of the throttle filter MAP based on the road roughness signal and the vehicle speed signal includes: if the vehicle speed is less than or equal to the preset speed value, selecting the throttle filter MAP using a first preset logic; if the vehicle speed is greater than the preset speed value, selecting the throttle filter MAP using a second preset logic.
[0047] Exemplarily, the radar sends the road surface roughness value k at a certain distance s in front of the vehicle to the vehicle controller in real time; the vehicle controller sets the road surface roughness thresholds: K1, K2. K1<K2; the vehicle controller calculates the altitude threshold: when k-K1≤0, 1 is generated; when k-K1>0, k-K2≤0, 2 is generated; when k-K2>0, 3 is generated. The vehicle controller sets four throttle filter MAPs A1, A2, A3, and A4. The A2 throttle filter MAP of the vehicle controller is used for the initial operation of the engine;
[0048] Different throttle filter MAPs have different throttle responses, and the response speeds are as follows: A1<A2<A3<A4; A2 has a throttle filter between A1 and A3, and can be used on most slightly bumpy roads; A1 has the largest throttle filter and the slowest throttle response, and is used on severely bumpy roads; A3 has a smaller throttle filter and a faster throttle response, and is mainly used on smooth low-speed roads; A4 has the smallest throttle filter and the fastest throttle response, and is mainly used on high-speed smooth roads.
[0049] The vehicle controller receives the vehicle speed V sent by the vehicle instrument, and sets the vehicle speed threshold: VS; the vehicle controller calculates the altitude threshold: when V-VS≤0, it generates 0; when V-VS>0, it generates 1; the vehicle controller identifies the vehicle demand torque Tb, Tm, Ts. When V-VS≤0 generates 0, the vehicle controller switches the throttle filter MAP according to the following first throttle filter MAP selection switching table. When V-VS>0 generates 1, the vehicle controller switches the throttle filter MAP according to "Table 3 Throttle Filter MAP Selection Switching Table".
[0050] Table 2 First Throttle Filter MAP Selection Switching Table
[0051]
[0052] Table 3 Second Throttle Filter MAP Selection Switching Table
[0053]
[0054] As an optional implementation, it also includes obtaining the driving state of the vehicle; determining whether the vehicle enters the in-gear coasting state; if the vehicle enters the in-gear coasting state, the vehicle controller stops electrically injecting fuel to the engine injector.
[0055] As an optional implementation, if the vehicle enters the in-gear gliding state, determine whether the throttle opening is 0; if the throttle opening is 0, determine the vehicle altitude difference between the third moment and the fourth moment; determine whether the vehicle altitude difference is greater than a preset maximum altitude; if the vehicle altitude difference is greater than the preset maximum altitude, output a signal to remind the driver that the vehicle is in gear.
[0056] Compared with the traditional manual switching of fuel-saving mode through physical buttons, this control strategy automatically switches the torque MAP according to road conditions, altitude, vehicle speed and other conditions to meet the transportation needs of different loads of the vehicle. It is more intelligent, more accurate in judgment, more convenient for the driver to operate, and has better fuel-saving effect. According to different road surfaces, vehicle speeds and torque requirements, the throttle filter MAP that is positioned to match them is used, which has better adaptability than the traditional single throttle filter MAP and can basically meet most transportation road conditions, eliminate torque mutations, reduce fuel consumption, and make driving smoother. Compared with the traditional neutral gear gliding, the engine still consumes fuel when idling, and the air pump and generator rotate slowly, which will cause insufficient brake pressure during braking. When exhaust brake intervention is required, the clutch needs to be stepped on, the gear needs to be engaged, and the exhaust brake switch needs to be turned on, which prolongs the exhaust brake intervention time, thereby creating safety hazards. During the gliding period, the engine of this control strategy does not spray fuel, and it will still be dragged by the whole vehicle to run at high speed. Other safety parts of the engine, such as the generator and air pump, will also work at high speed, and the transmission system will also remain connected. The exhaust brake can intervene at any time, so it will be safer. Through the combined effect of these three strategies, not only can better safety and comfort be provided, but also significant fuel-saving effects can be achieved.
[0057] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.
[0058] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.
[0059] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0060] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.
[0062] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0063] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0064] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A control method for reducing fuel consumption of commercial vehicles, It is characterized in that Including multiple throttle-speed torque MAPs and multiple throttle filter MAPs; Real-time acquisition of vehicle altitude information, vehicle speed information, required torque, vehicle acceleration, and road surface smoothness at a preset distance in front of the vehicle; Selecting the throttle-speed torque MAP according to the vehicle altitude information, vehicle speed information, required torque, and vehicle acceleration; The throttle filter MAP is selected according to the road surface smoothness at a preset distance in front of the vehicle and the vehicle speed information.
2. The control method for reducing fuel consumption of a commercial vehicle according to claim 1, It is characterized in that Also includes: Determine the difference in altitude between the vehicle at the first moment and the vehicle at the second moment; Determine the relationship between the vehicle altitude difference and a preset maximum altitude difference and a preset minimum altitude difference to obtain a vehicle altitude signal; respectively determining a first vehicle speed at a first moment and a second vehicle speed at a second moment; determining whether the first vehicle speed and the second vehicle speed meet a preset condition; When the first vehicle speed and the second vehicle speed reach a preset condition, determining a torque deviation within a first time period from the first moment to the second moment; Determining whether the torque deviation is less than a preset torque deviation value; If the torque deviation is less than the preset torque deviation value, the magnitude relationship between the vehicle acceleration and the preset acceleration value is determined to obtain an acceleration signal; The throttle-speed torque MAP is selected according to the vehicle altitude signal and the acceleration signal.
3. The control method for reducing fuel consumption of a commercial vehicle according to claim 2, It is characterized in that The preset conditions include: The first vehicle speed is less than the lowest vehicle speed in a first time period from the first moment to the second moment, and the second vehicle speed is greater than the highest vehicle speed in the first time period; wherein the first moment is before the second moment.
4. The control method for reducing fuel consumption of a commercial vehicle as claimed in claim 2, It is characterized in that If the torque deviation is less than the preset torque deviation value, determining the magnitude relationship between the vehicle acceleration and the preset acceleration value, and obtaining the acceleration signal includes: When the vehicle acceleration is less than a first acceleration preset value, a first acceleration signal is obtained; When the vehicle acceleration is greater than or equal to the first acceleration preset value and less than the second acceleration preset value, a second acceleration signal is obtained; When the vehicle acceleration is greater than or equal to the second acceleration preset value and less than the third acceleration preset value, a third acceleration signal is obtained; When the whole vehicle acceleration is greater than or equal to the third acceleration preset value, a fourth acceleration signal is obtained.
5. The control method for reducing fuel consumption of a commercial vehicle as claimed in claim 2, It is characterized in that The maximum torques of the torque MAPs at the throttle-speed conditions are increased in sequence, wherein the maximum vehicle engine torque is equal to the maximum engine torque.
6. The control method for reducing fuel consumption of a commercial vehicle according to claim 4, It is characterized in that When the first vehicle speed and the second vehicle speed reach a preset condition, the throttle-speed torque MAP including the maximum torque of the engine is selected when the engine is initially operated.
7. The control method for reducing fuel consumption of a commercial vehicle according to claim 1, It is characterized in that include: Obtaining the road surface smoothness at a preset distance in front of the vehicle; Determine the relationship between the road surface flatness and a preset maximum flatness value and a preset minimum flatness value; Outputting a road surface smoothness signal according to a magnitude relationship between the road surface smoothness and a preset maximum smoothness value and a preset minimum smoothness value; Get the vehicle speed; Determine the magnitude relationship between the vehicle speed and the preset vehicle speed value; The throttle filter MAP is selected according to the road surface roughness signal and the relationship between the vehicle speed and the preset vehicle speed value.
8. The control method for reducing fuel consumption of a commercial vehicle as claimed in claim 1, It is characterized in that The selecting the throttle filter MAP according to the road surface flatness at the preset distance in front of the vehicle and the vehicle speed information includes: If the vehicle speed is less than or equal to the preset vehicle speed value, the throttle filter MAP is selected using the first preset logic; If the vehicle speed is greater than the preset vehicle speed value, the throttle filter MAP is selected using the second preset logic.
9. The control method for reducing fuel consumption of a commercial vehicle according to claim 1, It is characterized in that It also includes obtaining the vehicle driving status; Determine whether the vehicle has entered the in-gear coasting state; If the vehicle enters the in-gear coasting state, the vehicle controller stops electronically injecting fuel to the engine's fuel injector.
10. The control method for reducing fuel consumption of a commercial vehicle according to claim 9, It is characterized in that If the vehicle enters the in-gear coasting state, determining whether the throttle opening is 0; If the throttle opening is 0, determining the vehicle altitude difference between the third moment and the fourth moment; Determining whether the vehicle altitude difference is greater than a preset maximum altitude; If the vehicle altitude difference is greater than a preset maximum altitude, a signal is output to remind the driver that the vehicle is in gear.