Control method, device and equipment of hydraulic auxiliary braking and storage medium

Abstract

The application relates to a hydraulic auxiliary braking control method, device, equipment and storage medium, wherein the control method comprises the following steps: acquiring a current state of a vehicle; controlling a hydraulic auxiliary braking system to start according to the current state of the vehicle satisfying a first preset condition; acquiring an engine speed; and controlling the hydraulic auxiliary braking system to stop according to the engine speed reaching a preset value. According to the hydraulic auxiliary braking control method, whether the hydraulic auxiliary braking system of the vehicle needs to be started or stopped can be judged according to the current state of the vehicle, the engine speed is adjusted, the problem that the engine speed is prone to over-limit operation during downhill driving of the vehicle is avoided, the braking effect of the vehicle is guaranteed, and the driving safety of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle control, and particularly relates to a control method, device and equipment of hydraulic auxiliary braking and a storage medium. BACKGROUND

[0002] In the field of automobiles, braking modes include driving braking, parking braking, engine braking and retarder braking. Among them, engine braking and retarder braking both belong to auxiliary braking. The auxiliary braking function is generally turned on to reduce the vehicle speed and ensure the safety of vehicle driving during the process of descending a long slope. The use of auxiliary braking can optimize the braking capacity of the vehicle during the process of emergency braking operation.

[0003] However, during the process of descending a slope, the vehicle drives the engine speed and vehicle speed to increase under the action of gravity, resulting in that the engine speed exceeds the designed maximum value and causes the hardware damage of the engine. Since the braking torque of the vehicle is limited during the process of descending a slope, the kinetic energy converted from gravity during the process of descending a slope cannot be fully absorbed by the hydraulic system of the vehicle to improve the braking torque of the vehicle. SUMMARY

[0004] The purpose of the present application is to at least solve the problem that the engine speed is prone to overrunning during the process of descending a slope of the existing vehicle. The purpose is achieved by the following technical scheme:

[0005] The first aspect of the present application provides a control method of hydraulic auxiliary braking, comprising:

[0006] obtaining the current state of the vehicle;

[0007] controlling the hydraulic auxiliary braking system to start according to the first preset condition being met by the current state of the vehicle;

[0008] obtaining the current engine speed;

[0009] controlling the hydraulic auxiliary braking system to close according to the current engine speed reaching a preset value.

[0010] The control method of hydraulic auxiliary braking provided by the present application needs to obtain the current state of the vehicle, judge whether the vehicle meets the first preset condition according to the current state of the vehicle, control the vehicle to start the hydraulic auxiliary braking system when the current state of the vehicle meets the first preset condition, adjust the driving parameters of the vehicle, then obtain the current engine speed, judge whether the vehicle needs to control the hydraulic auxiliary braking system to close according to whether the current engine speed reaches a preset value. It can be seen that the present application can judge whether the hydraulic auxiliary braking system of the vehicle needs to be started or closed according to the current state of the vehicle, and then adjust the engine speed, so as to avoid the problem that the engine speed is prone to overrunning during the process of descending a slope of the vehicle, and help to protect the braking effect of the vehicle and improve the driving safety of the vehicle.

[0011] In addition, the hydraulic auxiliary brake control method according to the application can further have the following additional technical features:

[0012] In some embodiments of the application, the first preset condition comprises:

[0013] The auxiliary brake switch is in an open state;

[0014] Or the engine enters a reverse drag state.

[0015] In some embodiments of the application, the engine entering the reverse drag state comprises:

[0016] The engine speed is not lower than a first speed;

[0017] Or the engine speed rise value is not lower than a preset value;

[0018] Or the engine speed rise rate is not lower than a preset rate;

[0019] And the engine fuel injection amount is continuously zero.

[0020] In some embodiments of the application, the hydraulic auxiliary brake system starting comprises:

[0021] Controlling the opening degree of the hydraulic main valve to be a first initial value;

[0022] And controlling the displacement of the hydraulic pump to be a second initial value;

[0023] And controlling the hydraulic cooling fan to be opened to the highest speed.

[0024] In some embodiments of the application, it further comprises:

[0025] According to the engine current speed not reaching the preset value, controlling the opening degree of the hydraulic main valve and the displacement of the hydraulic pump to make the engine speed reach the preset value.

[0026] In some embodiments of the application, after the vehicle current state meets the first preset condition, it further comprises:

[0027] Obtaining the current running parameter of the vehicle;

[0028] According to the vehicle current running parameter meeting the second preset condition, controlling the vehicle to exit the auxiliary brake.

[0029] In some embodiments of the application, the vehicle current running parameter meeting the second preset condition comprises:

[0030] The hydraulic oil temperature reaches a preset oil temperature;

[0031] or the displacement of the hydraulic pump does not exceed a preset displacement, and the duration is not less than a first preset time;

[0032] or the engine speed does not exceed a second speed, and the duration is not less than a second preset time;

[0033] or the vehicle speed does not exceed a preset vehicle speed, and the duration is not less than a third preset time.

[0034] The second aspect of the present application also proposes a control device for hydraulic auxiliary braking, which is used to execute the control method of hydraulic auxiliary braking of the present application, and the control device comprises:

[0035] an acquisition unit, configured to acquire a vehicle control signal and an engine operating parameter;

[0036] a determination unit, configured to determine whether a current state of the vehicle meets a first preset condition and whether a current engine speed reaches a preset value;

[0037] an auxiliary braking opening unit, configured to adjust the work of the hydraulic auxiliary braking system when the vehicle is running, so that the engine speed reaches the preset value;

[0038] a control unit, configured to control the start and stop of the hydraulic auxiliary braking system.

[0039] The third aspect of the present application also proposes a control device for hydraulic auxiliary braking, and all the control devices comprise:

[0040] one or more processors;

[0041] a memory, configured to store one or more programs;

[0042] When the one or more programs are executed by the one or more processors, the one or more processors implement the control method of hydraulic auxiliary braking as described above.

[0043] The fourth aspect of the present application also proposes a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the control method of hydraulic auxiliary braking as described above. BRIEF DESCRIPTION OF DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to limit the scope of the application in any way. Similarly, like reference numerals are intended to represent like parts throughout the various figures. In the drawings:

[0045] Figure 1Flow chart of the control method of the hydraulic brake assist according to the embodiment of the present application.

[0046] Figure 2 Structure diagram of the control device of the hydraulic brake assist according to the embodiment of the present application.

[0047] Figure 3 Logic diagram of the control method of the hydraulic brake assist according to the embodiment of the present application. DETAILED DESCRIPTION

[0048] Example embodiments of the present disclosure will be described herein below with reference to the accompanying drawings. While example embodiments of the present disclosure are illustrated in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0049] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0050] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0051] For ease of description, spatial relative terms can be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inner side", "outer side", "under", "below", "above", "on", and the like. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, then an element described as "below" or "under" another element or feature would then be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0052] As shown in Figure 1 According to one embodiment of the present application, a control method of hydraulic auxiliary braking is proposed, which, in terms of overall design, comprises:

[0053] obtaining the current state of the vehicle;

[0054] controlling the hydraulic auxiliary braking system to start according to the first preset condition being met by the current state of the vehicle;

[0055] obtaining the current engine speed;

[0056] controlling the hydraulic auxiliary braking system to stop according to the current engine speed reaching a preset value.

[0057] Specifically, the hardware structure required by the control method is shown in Figure 2 The same configuration as the existing transmission vehicle with hydraulic auxiliary braking system is used, mainly including the vehicle system, the engine system, the hydraulic auxiliary braking system and the engine electronic control unit. Among them, the vehicle system at least includes: engine auxiliary braking switch, vehicle speed signal sensor and slope sensor. The engine system at least includes engine speed sensor. The hydraulic auxiliary braking system at least includes: hydraulic pump, hydraulic main valve and hydraulic oil heat dissipation device. The engine electronic control unit is a controller that performs operation, processing and judgment according to the input signals of various sensors, and then outputs instruction to control the action of the actuator.

[0058] Firstly, the engine electronic control unit determines the current state of the vehicle according to the received information, and then judges whether the current state of the vehicle meets the first preset condition, and in the case that the current state of the vehicle meets the first preset condition, the hydraulic auxiliary braking system is started to adjust the running state of the vehicle. Subsequently, the engine electronic control unit obtains the current engine speed, and then judges whether the current engine speed reaches a preset value, and if the current engine speed reaches the preset value, the hydraulic auxiliary braking system is controlled to be closed, and the auxiliary braking is ended.

[0059] The application can determine whether the hydraulic auxiliary braking system of the vehicle needs to be started or closed according to the current state of the vehicle, and then adjust the engine speed, so as to avoid the problem that the engine speed is easy to exceed the limit during the downhill driving of the vehicle, and help to protect the braking effect of the vehicle and improve the driving safety of the vehicle.

[0060] In some embodiments of the application, the current state of the vehicle meeting the first preset condition includes that the auxiliary braking switch is in an open state, or the engine enters a reverse drag state.

[0061] The standard for judging that the auxiliary braking switch is in the open state is that after the vehicle operator presses the auxiliary braking switch, the engine electronic control unit will receive that the auxiliary braking switch is in the open state, and then the hydraulic auxiliary braking system is started.

[0062] The standard for judging that the engine enters the reverse drag state is that the engine electronic control unit obtains the engine speed n, the change of the engine speed within a certain time and the fuel injection amount L of the engine, and then determines that the engine enters the reverse drag state by judging that the engine speed n is not lower than a first speed n1, or the rising value Δn of the engine speed is not lower than a preset value Δn2', or the rising rate n / s of the engine speed is not lower than a preset rate n3 / s, and at the same time, the fuel injection amount L of the engine is continuously zero, and then controls the hydraulic auxiliary braking system to be started. In this embodiment, the first speed is set to 1900r / min; the preset value is set to 300r / min, that is, the engine speed reaches at least 2200r / min; and the preset rate is set to 200r / min / s, that is, the engine speed increases at least 200r / min per second.

[0063] In some embodiments of the application, starting the hydraulic auxiliary braking system includes:

[0064] controlling the opening degree of the hydraulic main valve to be a first initial value;

[0065] and controlling the displacement of the hydraulic pump to be a second initial value;

[0066] and controlling the hydraulic cooling fan to be started to the highest speed.

[0067] Specifically, as Figure 3As shown in the hydraulic auxiliary braking system, a hydraulic pump, a hydraulic main valve and a hydraulic oil radiator are provided, wherein the hydraulic main valve is configured to provide pressure oil discharged from the hydraulic pump to each actuator according to an instruction of an operator. In the embodiment, the hydraulic oil radiator includes a hydraulic oil radiator in communication with the hydraulic main valve and the hydraulic pump, and a hydraulic radiator fan fixedly connected to the hydraulic oil radiator. The pressure oil discharged from the hydraulic pump is provided to the hydraulic main valve, and then flows into the hydraulic oil radiator through the hydraulic main valve, and finally flows to the hydraulic pump.

[0068] In the embodiment, the starting of the hydraulic auxiliary braking system specifically includes that the engine electronic control unit controls the opening degree of the hydraulic main valve (hydraulic boom main valve) to a first initial value r0, controls the displacement of the hydraulic pump to a second initial value V0, and controls the hydraulic radiator fan to rotate at a highest speed. In the embodiment, the first initial value r0 is 50% of the opening degree of the hydraulic main valve, and the second initial value V0 is 50 ml / r.

[0069] It should be noted that in the driving state, the main arm of the vehicle is in the limit position of the arm retraction action, and the arm retraction action is continuously performed, so that the vehicle hydraulic system is overflowed, and the actual position of the boom is not affected.

[0070] In some embodiments of the present application, the engine electronic control unit further includes:

[0071] According to whether the current engine speed reaches a preset value, the opening degree of the hydraulic main valve and the displacement of the hydraulic pump are adjusted, so that the engine speed reaches the preset value.

[0072] Specifically, after the hydraulic auxiliary braking system is started, the engine electronic control unit obtains the current engine speed, and then judges whether the current engine speed reaches a preset value. If the current engine speed does not reach the preset value, the engine electronic control unit continues to adjust the opening degree of the hydraulic main valve and the displacement of the hydraulic pump, and then judges whether the adjusted current engine speed reaches the preset value, until the current engine speed reaches the preset value. At this time, the engine electronic control unit controls the hydraulic auxiliary braking system to be closed, and the auxiliary braking is exited. In the embodiment, the opening degree of the hydraulic main valve needs to be adjusted so that the pressure of the hydraulic system reaches a set pressure value P0=25 mPa, and the displacement of the hydraulic pump needs to be adjusted so that the engine speed n x =1500 r / min.

[0073] The engine electronic control unit of the present application can realize synchronous control of the engine and the hydraulic system, improve the engine auxiliary braking torque through the overflow of the hydraulic system, and change the power absorbed by the hydraulic auxiliary braking system through the displacement change of the hydraulic pump, so that the engine runs in a safe speed range.

[0074] In some embodiments of the present application, after the first preset condition is met according to the current state of the vehicle, the method further comprises:

[0075] obtaining the current operating parameters of the vehicle;

[0076] controlling the vehicle to exit the auxiliary braking according to the second preset condition being met by the current operating parameters of the vehicle.

[0077] Specifically, after the first preset condition is met according to the current state of the vehicle, i.e., the auxiliary braking switch is in the open state or the engine enters the reverse drag state, the electronic control unit obtains the current operating parameters of the vehicle, and then controls the vehicle to exit the auxiliary braking according to the second preset condition being met by the current operating parameters of the vehicle. In this embodiment, the current operating parameters of the vehicle include the hydraulic oil temperature, the displacement of the hydraulic pump and the parameters of the opened first timer, the engine speed and the parameters of the opened second timer, and the vehicle speed and the parameters of the opened third timer.

[0078] wherein the second preset condition being met according to the current operating parameters of the vehicle comprises:

[0079] the hydraulic oil temperature reaching a preset oil temperature;

[0080] or the displacement of the hydraulic pump being not more than a preset displacement and the duration being not less than a first preset time;

[0081] or the engine speed being not more than a second speed and the duration being not less than a second preset time;

[0082] or the vehicle speed being not more than a preset vehicle speed and the duration being not less than a third preset time.

[0083] Specifically, the electronic control unit will obtain the hydraulic oil temperature T, the displacement V of the hydraulic pump and the parameters m1 of the first timer, the engine speed n and the parameters m2 of the second timer, and the vehicle speed v and the parameters m3 of the third timer by obtaining the current operating parameters of the vehicle. Then the engine electronic control unit will determine:

[0084] whether the hydraulic oil temperature T reaches a preset oil temperature T0;

[0085] whether the displacement V of the hydraulic pump is not more than a preset displacement V0 and the duration m1 is not less than a first preset time t1;

[0086] whether the engine speed n is not more than a second speed n4 and the duration m2 is not less than a second preset time t2;

[0087] whether the vehicle speed v is not more than a preset vehicle speed v0 and the duration m3 is not less than a third preset time t3.

[0088] If any of the above four conditions are met, the engine electronic control unit will directly disengage the auxiliary braking without needing to activate the hydraulic auxiliary braking system. In this embodiment, the preset oil temperature T0 is 100℃, the first preset time t1 is 10s; the hydraulic pump displacement V is 20ml / r, and the first preset time t2 is 10s; the second speed n4 is 1000r / min, and the second preset time t2 is 5s; the vehicle speed v0 is 5km / h, and the third preset time t3 is 5s.

[0089] The hydraulic auxiliary braking control method described in this invention makes full use of the vehicle's hydraulic system to absorb the vehicle's downhill energy, thereby increasing the engine's auxiliary braking torque and reducing the risk of engine overspeed.

[0090] A second aspect of the invention also provides a control device for hydraulically assisted braking, the control device comprising:

[0091] The acquisition unit is used to acquire vehicle control signals and engine operating parameters;

[0092] The determining unit is used to determine whether the current state of the vehicle meets the first preset condition and whether the current engine speed has reached the preset value;

[0093] The auxiliary brake activation unit is used to adjust the operation of the hydraulic auxiliary braking system during vehicle operation so that the engine speed reaches a preset value;

[0094] The control unit is used to control the start and stop of the hydraulic auxiliary braking system.

[0095] Specifically, such as Figure 3 As shown, when the above-mentioned control device starts working, it will prioritize the hydraulic auxiliary braking control equipment to obtain the current state of the vehicle, namely the vehicle control signal and engine operating parameters. Among them, the vehicle control signal is the opening or closing signal of the auxiliary braking switch, and the engine operating parameters are the engine speed n, the engine speed rise value Δn, the engine speed rise rate n / s, and the engine fuel injection quantity L.

[0096] The engine electronic control unit will then determine the following two conditions; if either condition is met, the hydraulic auxiliary braking system will be activated:

[0097] 1. The auxiliary brake switch is in the ON position;

[0098] 2. The engine enters reverse drag mode;

[0099] The engine is considered to be in reverse when the fuel injection quantity L is continuously 0 and any one of the following three conditions is met.

[0100] n ≥ first rotational speed n1;

[0101] Δn ≥ preset value Δn2';

[0102] n / s ≥ preset rate n3 / s;

[0103] When the engine electronic control unit determines that the vehicle meets the above conditions, the hydraulic oil temperature T, the displacement V of the hydraulic pump, and the first timer parameter m1, the engine speed n and the second timer parameter m2, and the vehicle speed v and the third timer parameter m3 are obtained. Then it is determined whether the vehicle meets the following conditions, and if any of the following conditions is met, the hydraulic auxiliary braking control logic is exited:

[0104] T = T0;

[0105] V ≤ V1, and m1 ≥ t1;

[0106] n ≤ n4, and m2 ≥ t2;

[0107] v ≤ v0, and m3 ≥ t3.

[0108] If any of the above conditions is not met, the hydraulic auxiliary braking system is turned on, that is, the opening of the hydraulic main valve is controlled to the first initial value r0, the displacement of the hydraulic pump is controlled to the second initial value V0, and the hydraulic cooling fan is turned on to the highest speed.

[0109] Then, the engine electronic control unit obtains the current engine speed n', and determines whether the current engine speed n' is considered to reach the set value n x . If n' = n x , the hydraulic auxiliary braking system is turned off, and the hydraulic auxiliary braking control logic is exited. If n' ≠ n x , the hydraulic main valve real-time opening r x is controlled based on the hydraulic system pressure reaching the set pressure value P0, and the hydraulic pump real-time displacement is controlled to V x based on the engine set speed n x , so that n' = n x , and finally the hydraulic auxiliary braking system is adjusted to be turned off, and the hydraulic auxiliary braking control logic is exited.

[0110] The third aspect of the present application also proposes a hydraulic auxiliary braking control device, all of which comprises:

[0111] One or more processors;

[0112] Memory for storing one or more programs;

[0113] When the one or more programs are executed by the one or more processors, the one or more processors implement the hydraulic auxiliary braking control method as described above.

[0114] The above control device is in the form of a general purpose computing device. Components of the device can include, but are not limited to, one or more processors or processing units, memory, a bus that connects the various components (including the memory and the processing unit(s)).

[0115] The bus represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics accelerator bus, a processor or local bus using any of a variety of bus architectures.

[0116] The control device typically includes a variety of computer readable media. Such media can be any available media that is accessible by the device and includes both volatile and non-volatile media, removable and non-removable media.

[0117] The memory can include computer program readable media in the form of volatile memory, such as random access memory and / or cache memory. The device can further include other removable / non-removable, volatile / non-volatile computer storage media. The memory can include at least one program product having a set of program modules that are configured to carry out the functions of embodiments of the application. Program products, stored in, for example, the memory, can include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, which can include implementation of a network environment in each or some combination of these examples. Program modules are generally carried in the memory and / or the program product and implement the functions described herein.

[0118] The device can also communicate with one or more external devices such as a keyboard, a mouse, a camera, etc. and a display, as well as with one or more devices that enable a user to interact with the device. Further, the device can communicate with one or more devices that enable the device to communicate with one or more other computing devices. Such communication can be facilitated by an Input / Output (I / O) interface or interfaces. Still yet, the device can be capable of communicating with one or more networks, such as a local area network (LAN), a general area network (WAN), or a public network, such as the Internet, via a network adapter. The network adapter can communicate with the other components of the device via the bus. It should be appreciated that although not shown, other hardware and / or software components could be used in conjunction with the device. These include, but are not limited to, microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data archival storage systems, etc.

[0119] The processor performs various functions and data processing by executing programs stored in the memory.

[0120] The fourth aspect of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the control method of the hydraulic auxiliary brake.

[0121] The computer storage medium of the embodiments of the present application can select any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor device, device or apparatus, or any combination thereof. More specific examples (non-exhaustive list) of the computer readable storage medium include: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution device, device or apparatus.

[0122] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method for hydraulic assisted braking, characterized in that, include: Get the current status of the vehicle; If the vehicle's current state meets the first preset condition, the hydraulic auxiliary braking system is activated to adjust the vehicle's operating state. Get the current engine speed; Based on the engine speed reaching a preset value, the hydraulic auxiliary braking system is shut down. The hydraulic auxiliary braking system includes at least: a hydraulic pump, a hydraulic main valve, and a hydraulic oil cooling device. The hydraulic main valve is used to supply pressurized oil discharged by the hydraulic pump to each actuator according to the operator's instructions. The hydraulic oil cooling device includes a hydraulic oil cooler that is interconnected with the hydraulic main valve and the hydraulic pump, and a hydraulic cooling fan that is fixedly connected to the hydraulic oil cooler. The activation of the hydraulic auxiliary braking system includes: The opening degree of the hydraulic main valve is controlled to the first initial value; And control the displacement of the hydraulic pump to the second initial value; And control the hydraulic cooling fan to turn on to its maximum speed; If the current engine speed does not reach the preset value, control and adjust the opening of the hydraulic main valve and the displacement of the hydraulic pump to make the engine speed reach the preset value. After the first preset condition is met based on the current state of the vehicle, the process further includes: Obtain the vehicle's current operating parameters; Based on the fact that the vehicle's current operating parameters meet the second preset condition, control the vehicle to disengage from auxiliary braking; The condition of satisfying the second preset condition based on the current operating parameters of the vehicle includes: The hydraulic oil temperature has reached the preset oil temperature; Or the displacement of the hydraulic pump does not exceed the preset displacement, and the duration is not less than the first preset time; Or the current engine speed does not exceed the second speed, and the duration is not less than the second preset time; Or the vehicle speed does not exceed the preset speed, and the duration is not less than the third preset time.

2. The control method for hydraulic assisted braking according to claim 1, characterized in that, The condition that the vehicle's current state meets the first preset condition includes: The auxiliary brake switch is in the ON position; Or the engine enters a reverse drag state.

3. The control method for hydraulic assisted braking according to claim 2, characterized in that, The engine entering the reverse drag state includes: The current engine speed is not lower than the first speed; Or the increase in engine speed is not lower than a preset value; Or the rate of increase of the engine speed is not lower than a preset rate; Furthermore, the fuel injection quantity of the engine remains at zero.

4. A control device for hydraulic auxiliary braking, characterized in that, The control device is used to execute the hydraulic auxiliary braking control method according to any one of claims 1-3, and the control device includes: The acquisition unit is used to acquire vehicle control signals and engine operating parameters; The determining unit is used to determine whether the current state of the vehicle meets the first preset condition and whether the current engine speed has reached the preset value; The auxiliary brake activation unit is used to adjust the operation of the hydraulic auxiliary braking system during vehicle operation so that the engine speed reaches a preset value; The control unit is used to control the start and stop of the hydraulic auxiliary braking system.

5. A control device for hydraulic auxiliary braking, characterized in that, All control devices include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the hydraulic assisted braking control method as described in any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the control method for hydraulic assisted braking as described in any one of claims 1-3.

Images