CN115675461A

CN115675461A - Brake cruise control method, device, equipment and medium for heavy-duty traction vehicle

Info

Publication number: CN115675461A
Application number: CN202211476824.7A
Authority: CN
Inventors: 吕迎波; 姜峰; 曹冰; 冯康; 张文超
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-02-03

Abstract

The application provides a brake cruise control method, device, equipment and medium for a heavy-duty traction vehicle. The method comprises the following steps: under the condition that a brake cruise mode is activated, when a vehicle descends downhill, acquiring the deviation between the current speed and the target speed of the vehicle; if the deviation is larger than a preset value, starting an auxiliary brake of the engine, and acquiring target braking power according to the current vehicle speed and the target vehicle speed; predicting available braking power of the engine auxiliary brake according to the current running information of the engine; and if the available braking power is smaller than the target braking power, an instrument program gives an alarm to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine, so that the available braking power of the engine auxiliary brake is increased. The method can provide enough braking power for the vehicle only by means of manual downshifting, has simple system mechanism, easy operation and low use cost, and can ensure the safe downhill of the vehicle.

Description

Brake cruise control method, device, equipment and medium for heavy-duty traction vehicle

Technical Field

The present application relates to the field of vehicle safety brake cruise, and more particularly to a brake cruise control method, apparatus, device, and medium for a heavy-duty traction vehicle.

Background

The safety problem is of great concern regardless of the vehicle being driven, and braking is currently carried out in a complex and not necessarily reliable manner in terms of safety braking of heavy tractors.

In order to meet the downhill braking power requirements of different slopes, the conventional vehicle generally adopts a graded braking mode to brake, and when an engine reaches the maximum braking power, braking force is output to the vehicle by cylinder breaking or controlling the opening number of braking electromagnetic valves; or a control method for automatically controlling the braking gear is adopted, and the method cannot solve the problem that the braking requirement cannot be met after the braking power output reaches the upper limit under the current engine rotating speed, so that the requirement of safe braking cannot be met, and the cost is relatively high.

The method has the advantages that whether the braking power under the current engine speed can meet the requirement of safe braking of the vehicle or not can be automatically judged in the long slope descending process, and the problem that the brake cruise is urgently needed to be solved on the premise that the cost is low and the system structure and the control method are simple is solved.

Disclosure of Invention

The application provides a brake cruise control method, a brake cruise control device, equipment and a brake cruise control medium for a heavy-duty traction vehicle, which are used for solving the problems that the braking mode of providing braking power through an engine and an engine cylinder is complex and enough safety cannot be guaranteed in the prior art.

In a first aspect, the present application provides a brake cruise control method for a heavy-duty traction vehicle, comprising:

under the condition that a brake cruise mode is activated, when a vehicle descends downhill, acquiring the deviation between the current speed and the target speed of the vehicle;

if the deviation is larger than a preset value, starting an auxiliary brake of the engine, and acquiring target braking power according to the current vehicle speed and the target vehicle speed;

predicting available braking power of the engine auxiliary brake according to the current running information of the engine;

and if the available braking power is smaller than the target braking power, an instrument program gives an alarm to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine, so that the available braking power of the engine auxiliary brake is increased.

In one possible implementation manner, the obtaining a target braking power according to the current vehicle speed and the target vehicle speed includes:

acquiring a first braking force according to the current vehicle speed and the target vehicle speed;

acquiring a second braking force according to the mass of the vehicle, the current vehicle speed and the vehicle speed of the vehicle at the last moment;

acquiring a braking force demand of the vehicle according to the first braking force and the second braking force;

and obtaining the target braking power according to the braking force demand and the current speed of the vehicle.

In one possible implementation manner, the obtaining a first braking force according to the current vehicle speed and the target vehicle speed includes:

obtaining a target vehicle speed difference value according to the current vehicle speed and the target vehicle speed;

and obtaining a first braking force according to the target vehicle speed difference.

In one possible implementation manner, the obtaining a second braking force according to the mass of the vehicle, the current vehicle speed, and the vehicle speed at a time on the vehicle includes:

obtaining a current vehicle speed difference value according to the current vehicle speed and the vehicle speed at the previous moment;

and obtaining a second braking force according to the current vehicle speed difference and the mass of the vehicle.

In one possible implementation manner, the obtaining a deviation between a current vehicle speed and a target vehicle speed of the vehicle includes:

acquiring the current speed of the vehicle through real-time monitoring, and acquiring the target speed of the vehicle;

and subtracting the target vehicle speed from the current vehicle speed to obtain the deviation.

In one possible implementation manner, the estimating available braking power of the engine auxiliary brake according to the current engine operation information includes:

and predicting the available braking power of the auxiliary brake of the engine according to the information of the rotating speed, the air inflow and the cold pressure of the current engine and by combining Map data of the engine.

In a possible implementation manner, after predicting available braking power of the engine auxiliary brake according to the current operation information of the engine, the method further includes:

if the available power is larger than or equal to the target braking power, continuously comparing whether the deviation is larger than the preset value or not, and turning off the auxiliary brake of the engine until the deviation is smaller than the preset value.

In a second aspect, the present application provides a braking device for a heavy-duty traction vehicle, comprising:

the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring the deviation between the current speed and the target speed of the vehicle when the vehicle runs down a slope under the condition that a brake cruise mode is activated;

the second obtaining module is used for starting an engine auxiliary brake if the deviation is larger than a preset value, and obtaining target brake power according to the current vehicle speed and the target vehicle speed;

the pre-estimation module is used for pre-estimating the available braking power of the engine auxiliary brake according to the current running information of the engine;

and the processing module is used for alarming by an instrument program to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine if the available braking power is smaller than the target braking power, so that the available braking power of the engine auxiliary brake is increased.

In a third aspect, the present application provides a braking apparatus for a heavy-duty traction vehicle, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes the computer-executable instructions stored by the memory such that the at least one processor performs the method of brake cruise control for a heavy-duty traction vehicle as described above.

In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for brake cruise control of a heavy traction vehicle as described above.

According to the brake cruise control method, device, equipment and medium for the heavy-duty traction vehicle, under the condition that a brake cruise mode is activated, when the vehicle goes downhill, the deviation between the current speed and the target speed of the vehicle is obtained; if the deviation is larger than a preset value, starting an auxiliary brake of the engine, and acquiring target braking power according to the current vehicle speed and the target vehicle speed; predicting available braking power of the engine auxiliary brake according to the current running information of the engine; and if the available braking power is smaller than the target braking power, an instrument program gives an alarm to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine, so that the available braking power of the engine auxiliary brake is increased. According to the method, the brake power which can be provided by the auxiliary brake of the engine and the target brake power for safely braking the vehicle are obtained, when the available brake power is smaller than the target brake power, namely the brake power of the current engine cannot meet the requirement, an instrument program gives an alarm to remind a driver to perform downshift treatment, the rotating speed of the engine can be increased after downshift so as to increase the brake power, enough brake power can be provided for the vehicle, and the vehicle can be ensured to safely descend; the brake cruise system related in the process is simple and easy to operate, has low failure rate, has simple structure, easy operation and low use cost for the heavy traction vehicle with the manual transmission, and can ensure the safe downhill of the vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic illustration of a brake cruise system for a heavy-duty traction vehicle according to an embodiment of the present application;

FIG. 2 is a first flowchart of a braking method of a brake cruise system of a heavy-duty traction vehicle according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of a second method for braking the brake cruise system of the heavy-duty vehicle according to the embodiment of the present disclosure;

FIG. 4 is a graph of engine auxiliary braking power as a function of engine speed provided by an embodiment of the present application;

FIG. 5 is a diagram of a brake assembly for a heavy-duty traction vehicle according to an embodiment of the present invention;

FIG. 6 is a hardware schematic diagram of a braking apparatus for a heavy-duty traction vehicle according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to meet the braking requirements of different slopes and slopes of most of vehicles carrying the engine auxiliary brake at present, the engine auxiliary brake is generally adjusted to a current maximum braking power state in a graded braking mode, partial or all braking force is output to the vehicle by cylinder breaking or controlling the opening number of electromagnetic valves, but the problem that the brake power which can be output under the current engine rotating speed reaches the upper limit cannot be solved, so that the driving safety of a driver is influenced; the process of adjusting the output braking force sometimes depends on the judgment of the driver to adjust the braking power, and the process is complicated to operate and may cause a problem that the vehicle cannot be stabilized in time.

The application thus proposes a simpler braking method which nevertheless makes it possible to provide sufficient braking power for a downhill slope of the vehicle.

The following detailed description of the embodiments of the invention refers to the accompanying drawings.

FIG. 1 is a schematic illustration of a brake cruise system for a heavy-duty traction vehicle according to an embodiment of the present disclosure. As shown in fig. 1, the system includes: a Brake cruise mode switch, a controller, an instrument, an engine auxiliary Brake, an on-board computer (ECU), and an Antilock Brake System (ABS);

the anti-lock brake system comprises an anti-lock controller, a brake controller and a brake controller, wherein the anti-lock controller is used for enabling a vehicle to be in a rolling and slipping state in the braking process, namely a locked state; since the steering wheel of the vehicle cannot be turned when the vehicle is in a locked state, which is dangerous for the vehicle in a braking state, the brake cruise mode switch needs to be turned on when the anti-lock controller gives a signal that the vehicle is in a non-locked state; the anti-lock Brake controller can also be Electronic Brake Systems (EBS), which can assist in braking the vehicle;

when the brake cruise mode switch is turned on, the brake cruise mode is indicated to be entered, the controller can acquire the current speed of the vehicle in real time and calculate whether the braking power supplied by the current vehicle meets the requirement (target braking power), and when the braking power does not meet the requirement, a downshift request is required, and prompt information is sent to an instrument to be displayed; wherein, the meter is written with a meter program which can give an alarm when the available dynamic power is less than the target braking power.

The brake cruise system is simple in structure, can automatically judge whether the brake power supplied by the current vehicle meets the vehicle speed control requirement, reminds a driver to perform vehicle downshift treatment, ensures that the auxiliary brake can output enough brake power in the downhill process, and ensures safe downhill.

How an embodiment of the present invention downshifts the engine to meet a braking demand will be described in detail below with reference to fig. 2.

FIG. 2 is a first flowchart of a braking method of a brake cruise system of a heavy-duty traction vehicle according to an embodiment of the present disclosure. As shown in fig. 2, the method includes:

s201, under the condition that the brake cruise mode is activated, when the vehicle goes downhill, the deviation between the current vehicle speed and the target vehicle speed of the vehicle is obtained.

The vehicle is easy to have some potential safety hazards in the braking process of the vehicle on the downhill, and safety accidents such as overturning and the like can be caused no matter the braking speed is too high or too low, so that a safe braking method needs to be arranged for the vehicle, and the vehicle can be ensured to smoothly go downhill.

The brake cruise mode may be controlled by a brake cruise mode switch, which is activated by the driver and the vehicle determines whether to enter the brake cruise mode; when the brake cruise mode is activated, it indicates that the vehicle is entering a brake cruise condition.

The vehicle is not free to enter the brake cruise mode, and it is necessary to confirm whether the vehicle is in an emergency braking state before that.

For example, whether an anti-lock controller of the vehicle is in an anti-lock state is confirmed, and if the anti-lock controller of the vehicle is in the anti-lock state, the brake cruise mode is activated after the vehicle is waited to release the anti-lock state. The brake cruise mode includes cruise and auxiliary braking processes;

and confirming that the vehicle is not in a brake anti-lock controller control state, mainly preventing wheels from being locked when the vehicle is emergently braked, and if so, activating the brake cruise mode after waiting for the vehicle to remove the anti-lock state.

When the brake cruise mode is activated, the current vehicle speed and the target vehicle speed of the vehicle are acquired in real time, wherein the target vehicle speed can be the best brake speed in the current downhill state, and different target vehicle speeds in different downhill states can be recorded into a vehicle system in advance and are called when the system needs.

The current speed is obtained by a speed measuring device related to a vehicle system, and the current speed of the vehicle is actually obtained in real time when the vehicle is not braked and is displayed on an instrument in real time; the current vehicle speed of the vehicle is obtained here, and is used for comparing with the target vehicle speed, and calculating the deviation between the current vehicle speed and the target vehicle speed, that is, obtaining the speed difference between the current vehicle speed and the target vehicle speed, if the speed difference is too large, it indicates that the braking effect of the vehicle is not good, and even a safety problem may occur.

The method for acquiring the deviation between the current vehicle speed and the target vehicle speed of the vehicle comprises the following steps: illustratively, the current speed of the vehicle is obtained through real-time monitoring, and the target speed of the vehicle is obtained; and subtracting the target vehicle speed from the current vehicle speed to obtain the deviation.

The real-time monitoring is realized by a speed measuring device related to a vehicle system, and a speed difference value between the current vehicle speed and the target vehicle speed is obtained by subtracting the target vehicle speed from the current vehicle speed; if the deviation is a positive value, the current vehicle speed is greater than the target vehicle speed, and the current vehicle speed needs to be reduced; if the deviation is a negative value, the current vehicle speed is smaller than the target vehicle speed, namely the current vehicle state is safe, adjustment is not needed, and auxiliary braking can be carried out after the deviation is judged to be a negative value; generally, the current vehicle speed needs to be reduced when the auxiliary brake is selected;

optionally, whether the current vehicle speed is less than the target vehicle speed may be determined by the vehicle system, and if so, the auxiliary brake is not activated.

S202, if the deviation is larger than a preset value, starting an auxiliary brake of the engine, and acquiring target braking power according to the current vehicle speed and the target vehicle speed.

The deviation value is a positive value, the preset value indicates that the deviation between the current vehicle speed and the target vehicle speed is regarded as the maximum value of the safety deviation, or the preset value can be set to be a certain value smaller than the maximum value of the safety deviation, and the preset value can also indicate the proximity degree of the current vehicle speed and the target vehicle speed of the vehicle; when the deviation is smaller than a preset value, the vehicle is in a safe braking state, and the current vehicle has enough braking capacity due to the fact that the current vehicle speed is close to the target vehicle speed;

when the deviation is larger than a preset value, the vehicle is possibly in an unsafe braking state or the braking capacity is insufficient, and an auxiliary brake of the engine needs to be started for auxiliary braking; wherein the braking capacity is represented by braking power;

the vehicle has different braking power demands in different states, and the braking power demand is the target braking power which the vehicle needs to reach.

And S203, predicting available braking power of the auxiliary brake of the engine according to the current running information of the engine.

The current operation information of the engine comprises information such as the rotating speed of the engine, and the like, and the available braking power of the auxiliary brake of the engine can be correspondingly inquired according to the information such as the rotating speed:

for example, the available braking power of the auxiliary brake of the engine is estimated according to the information of the rotating speed, the air inflow and the cold pressure of the current engine and by combining Map data of the engine.

S204, if the available braking power is smaller than the target braking power, an instrument program gives an alarm to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine, so that the available braking power of the engine auxiliary brake is increased.

If the available braking power is smaller than the target braking power, the current vehicle gear is not enough to provide enough braking effect for the vehicle, and the vehicle gear needs to be adjusted; the downshift process is carried out step by step until the available braking power is reduced to be larger than or equal to the target braking power, which indicates that the available braking power is enough for the vehicle to brake stably, and the downshift process can be stopped to avoid the excess braking power.

If the available power is larger than or equal to the target braking power, the current vehicle gear is enough to provide a stable vehicle and provide enough braking effect for the vehicle, and the vehicle can brake stably, so that no adjustment is needed:

for example, if the available power is greater than or equal to the target braking power, the comparison is continued to see if the deviation is greater than the preset value, and the engine auxiliary brake is turned off until the deviation is less than the preset value.

Since no additional adjustments need to be made, the vehicle may exit the auxiliary brakes, but may continue to cruise.

In the embodiment of the application, under the condition that the brake cruise mode is activated, when a vehicle descends, the deviation between the current speed and the target speed of the vehicle is obtained; if the deviation is larger than a preset value, starting an engine auxiliary brake, and acquiring target brake power according to the current vehicle speed and the target vehicle speed; predicting available braking power of the engine auxiliary brake according to the current running information of the engine; and if the available braking power is smaller than the target braking power, an instrument program gives an alarm to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and improve the rotating speed of the engine, so that the available braking power of the engine auxiliary brake is increased. According to the method, the brake power which can be provided by the auxiliary brake of the engine and the target brake power for safely braking the vehicle are obtained, when the available brake power is smaller than the target brake power, namely the brake power of the current engine cannot meet the requirement, an instrument program gives an alarm to remind a driver to perform downshift treatment, the rotating speed of the engine can be increased after downshift so as to increase the brake power, enough brake power can be provided for the vehicle, and the vehicle can be ensured to safely descend; and the brake cruise system related in the process is simple and easy to operate, low in failure rate and low in cost.

How to obtain the target braking power according to the embodiment of the present invention is specifically described below with reference to fig. 3.

Fig. 3 is a flowchart of a braking method of a brake cruise system of a heavy-duty traction vehicle according to an embodiment of the present application. As shown in fig. 3, the method includes:

s301, acquiring a first braking force according to the current vehicle speed and the target vehicle speed.

The current vehicle speed and the target vehicle speed are both available parameters, and the first braking force can be obtained by combining the current driving power coefficient related to the vehicle speed and the resistance.

Specifically, a braking force difference when the vehicle reaches a target vehicle speed, namely a first braking force, can be obtained according to a difference value between the current vehicle speed and the target vehicle speed:

illustratively, a target vehicle speed difference value is obtained according to the current vehicle speed and the target vehicle speed;

And the target vehicle speed difference value is a value obtained by subtracting the target vehicle speed from the current vehicle speed.

S302, acquiring a second braking force according to the mass of the vehicle, the current vehicle speed and the vehicle speed of the vehicle at the last moment.

The mass of the vehicle, the current speed and the speed at the moment on the vehicle are all available parameters, wherein the mass of the vehicle can be directly recorded in a system of the vehicle, the current speed and the speed at the moment on the vehicle are parameters available in real time, and a specific mode of acquiring the second braking force according to the data is as follows:

illustratively, a current vehicle speed difference value is obtained according to the current vehicle speed and the vehicle speed at the previous moment;

And the current vehicle speed difference is the value obtained by subtracting the vehicle speed at the last moment from the current vehicle speed.

And S303, acquiring the braking force demand of the vehicle according to the first braking force and the second braking force.

And adding the first braking force and the second braking force to obtain the braking force demand of the vehicle.

S304, obtaining the target braking power according to the braking force demand and the current speed of the vehicle.

And multiplying the braking force demand by the current speed of the vehicle to obtain the target braking power, namely the braking power which the vehicle should reach is stabilized.

One of the ways of obtaining the target braking power in this embodiment can be represented by the following formula, which is optional:

ΔF＝m _v (V _t -V _set )+m(V _t -V _t-1 )

ΔP＝ΔF×V _t

where Δ P is the target braking power, Δ F is the braking force demand of the vehicle, V _t For the current vehicle speed, V _set Is a target vehicle speed, V _t-1 M is the vehicle speed at the previous moment _v M is a coefficient relating to the vehicle speed and the resistance, and m is the mass of the vehicle.

When the change of the auxiliary braking power of the engine is obtained, a curve chart of the change of the auxiliary braking power of the engine is required to be utilized.

FIG. 4 is a graph of engine auxiliary braking power as a function of engine speed according to an embodiment of the present application. As shown in fig. 4, the engine auxiliary braking power variation indicates the power that the engine can provide, and the higher the rotation speed, the greater the braking power that the engine can provide. In FIG. 4, r/min represents revolutions per minute, and a larger value represents a larger engine speed.

Referring to the relationship between the braking power provided by the engine and the gear in the above embodiments, firstly, the lower the gear, the larger the rotating speed, as can be seen from fig. 4, the rotating speed and the braking power are positively correlated, and when the rotating speed of the vehicle is 1500r/min, the braking power provided by the auxiliary brake of the engine is between 50% and 75% of the total power of the auxiliary brake.

Fig. 5 is a diagram of a braking apparatus for a heavy traction vehicle according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes: a first obtaining module 501, a second obtaining module 502, an estimating module 503 and a processing module 504;

the first obtaining module 501 is configured to obtain a deviation between a current vehicle speed and a target vehicle speed of a vehicle when the vehicle is downhill under a brake cruise mode activation condition.

The first obtaining module 501 is further configured to obtain a current vehicle speed of the vehicle through real-time monitoring, and obtain a target vehicle speed of the vehicle;

A second obtaining module 502, configured to turn on an engine auxiliary brake if the deviation is greater than a preset value, and obtain a target braking power according to the current vehicle speed and the target vehicle speed.

A second obtaining module 502 for

The second obtaining module 502 is further configured to obtain a current vehicle speed difference according to the current vehicle speed and the vehicle speed at the previous moment;

An estimation module 503 is configured to estimate available braking power of the engine auxiliary brake according to the current engine operation information.

And the processing module 504 is used for alarming by an instrument program to remind a driver of manually adjusting the gear of the vehicle so as to reduce the gear of the vehicle and increase the rotating speed of the engine if the available braking power is smaller than the target braking power, so that the available braking power of the engine auxiliary brake is increased.

The processing module 504 is further configured to, if the available power is greater than or equal to the target braking power, continue to compare whether the deviation is greater than the preset value, until the deviation is less than the preset value, and turn off the engine auxiliary brake.

The present application further provides a braking apparatus for a heavy-duty traction vehicle, comprising: at least one processor and a memory;

the memory stores computer-executable instructions;

the at least one processor executes the computer-executable instructions stored by the memory such that the at least one processor executes a brake cruise control method for a heavy-duty traction vehicle.

FIG. 6 is a hardware schematic diagram of a braking apparatus for a heavy-duty traction vehicle according to an embodiment of the present invention. As shown in fig. 6, the present embodiment provides a brake apparatus 60 of a heavy traction vehicle including: at least one processor 601 and memory 602. The device 60 further comprises a communication component 603. The processor 601, the memory 602, and the communication section 603 are connected by a bus 604.

In particular implementations, the at least one processor 601 executes computer-executable instructions stored by the memory 602, causing the at least one processor 601 to perform the method as described above.

For a specific implementation process of the processor 601, reference may be made to the above method embodiments, which implement the principle and the technical effect similarly, and details of this embodiment are not described herein again.

In the embodiment shown in fig. 6, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

The Memory may include a high-speed Memory (RAM) and may also include a Non-volatile Memory (NVM), such as at least one disk Memory.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

The present application also provides a computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement a brake cruise control method for a heavy haul vehicle as described above.

The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.

The division of the units is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains, and as may be applied to the details of construction and as follows in the construction and use of the invention, the invention is not limited to the precise arrangements set forth herein and as shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A brake cruise control method for a heavy-duty traction vehicle, comprising:

2. The method of claim 1, wherein said deriving a target braking power based on said current vehicle speed and said target vehicle speed comprises:

3. The method of claim 2, wherein the obtaining a first braking force based on the current vehicle speed and the target vehicle speed comprises:

4. The method of claim 3, wherein obtaining a second braking force based on the mass of the vehicle, the current vehicle speed, and a vehicle speed at a time on the vehicle comprises:

5. The method of claim 1, wherein the obtaining a deviation between a current vehicle speed and a target vehicle speed of the vehicle comprises:

6. The method of claim 1, wherein estimating available braking power of the engine auxiliary brake based on current engine operating information comprises:

7. The method of claim 1, wherein after predicting available braking power of the engine auxiliary brake based on current engine operating information, further comprising:

8. A braking device for a heavy traction vehicle, comprising:

9. A braking apparatus for a heavy traction vehicle, comprising: at least one processor and memory;

the memory stores computer execution instructions;

the at least one processor executing the computer-executable instructions stored by the memory cause the at least one processor to perform the method of brake cruise control of a heavy-duty traction vehicle according to any of claims 1-7.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of a method for brake cruise control of a heavy traction vehicle according to any one of claims 1-7.