CN111267802B - Vehicle control method, vehicle control system and automobile - Google Patents
Vehicle control method, vehicle control system and automobile Download PDFInfo
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- CN111267802B CN111267802B CN202010164612.XA CN202010164612A CN111267802B CN 111267802 B CN111267802 B CN 111267802B CN 202010164612 A CN202010164612 A CN 202010164612A CN 111267802 B CN111267802 B CN 111267802B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2260/00—Interaction of vehicle brake system with other systems
- B60T2260/09—Complex systems; Conjoint control of two or more vehicle active control systems
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Regulating Braking Force (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention provides a vehicle control method, a vehicle control system and an automobile. The vehicle control method includes: step S10: acquiring a parameter signal of a vehicle; step S20: determining the running state of the vehicle according to the parameter signal; step S30: the operating state of an auxiliary brake device of the vehicle is controlled according to the driving state of the vehicle, wherein the parameter signals at least comprise a first rotating speed signal, a throttle position signal and a brake signal of the engine. Through the technical scheme of the invention, the running speed of the vehicle can be controlled according to the running state of the vehicle, so that the passive overspeed phenomenon in the running process of the vehicle can be prevented, the damage of the engine caused by the reverse dragging of the engine by the vehicle due to the inertia effect can be effectively reduced, the running safety of the vehicle can be improved, and the use cost of the vehicle can be reduced.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a vehicle control method, a vehicle control system and an automobile.
Background
In the process of high-speed driving of an automobile, a passive overspeed phenomenon is easily caused due to the action of self inertia, and particularly when the automobile runs on a high-speed downhill, if a driver does not operate properly or operates untimely, the driving speed of the automobile is easily caused to exceed the safe rotating speed of the engine, so that the automobile body drags the engine reversely, and the engine is damaged. This is particularly true for heavy vehicles such as cargo vehicles and construction vehicles. At present, the problem that the passive overspeed of an automobile mainly depends on the manual operation of a driver is solved, the driver is required to have higher driving experience and reaction capability, the operation difficulty of the automobile is increased, and certain potential safety hazards exist.
Disclosure of Invention
The present invention is directed to improving at least one of the technical problems of the prior art or the related art.
To this end, an object of the present invention is to provide a vehicle control method.
It is another object of the present invention to provide a vehicle control system.
It is yet another object of the present invention to provide an automobile.
In order to achieve the above object, a first aspect of the present invention provides a vehicle control method including: step S10: acquiring a parameter signal of a vehicle; step S20: determining the running state of the vehicle according to the parameter signal; step S30: the operating state of an auxiliary brake device of the vehicle is controlled according to the driving state of the vehicle, wherein the parameter signals at least comprise a first rotating speed signal, a throttle position signal and a brake signal of the engine.
According to the technical scheme of the first aspect of the invention, the parameter signal of the vehicle is obtained to determine the current running parameter of the vehicle through the parameter signal, and then the current running state of the vehicle is determined according to the running parameter of the vehicle to judge whether the vehicle is in the passive overspeed state or not, so that a basis is provided for the subsequent control operation of the vehicle. The parameter signals at least comprise a first rotating speed signal, an accelerator position signal and a brake signal of the engine so as to obtain a first rotating speed of the engine of the vehicle and determine whether the vehicle has an acceleration instruction and a brake instruction. The running state of an auxiliary braking device of the vehicle is controlled according to the running state of the vehicle, so that when the vehicle is determined to be in a passive overspeed state, the auxiliary braking device is controlled to be started, auxiliary braking is carried out on the vehicle, the running speed of the vehicle is reduced, the rotating speed of the engine is further reduced, and the rotating speed of the engine is restored to be within a safe rotating speed range, so that the damage of the engine is prevented.
The passive overspeed is a phenomenon that the engine speed exceeds the maximum speed specified by the design because the vehicle drags the engine due to the inertia of the vehicle when the vehicle is running at high speed or going down a slope at high speed. If the driving operation is improper, the passive overspeed phenomenon is easy to cause engine damage, and particularly under the condition that the vehicle is in a heavy load state, the situation is serious.
In addition, the vehicle control method in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, step S20: determining the running state of the vehicle according to the parameter signal, which specifically comprises the following steps: step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to the first rotating speed signal of the engine to generate a first judgment result; if the first determination result is yes, go to step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal, and generating a second judgment result; if the first determination result is negative, go to step S203: confirming that the vehicle is not in a passive overspeed state; if the second determination result is yes, step S203 is executed: confirming that the vehicle is not in a passive overspeed state; if the second determination result is negative, go to step S204: confirming that the vehicle is in a passive overspeed state; step S30: the method for controlling the running state of the auxiliary braking device of the vehicle according to the running state of the vehicle specifically comprises the following steps: if the vehicle is in the passive overspeed state, step S301 is executed: controlling the auxiliary braking device to start; if the vehicle is not in the passive overspeed state, go to step S302: and controlling the auxiliary brake device to be closed.
In this embodiment, step S20 includes multiple substeps. Specifically, the current rotating speed of the engine is determined according to a first rotating speed signal of the engine, whether the vehicle is in an overspeed state currently is judged by comparing the first rotating speed of the engine with a safe rotating speed threshold value, and a first judgment result is generated. If the first judgment result is yes, whether the vehicle has an acceleration instruction at the moment is judged according to the accelerator position signal, so that whether the vehicle is overspeed due to active acceleration of a driver at the moment is judged, and meanwhile, a second judgment result is generated. If the second judgment result is yes, the fact that the vehicle is overspeed due to active acceleration of the driver is proved, and the vehicle is not overspeed passively; if the second judgment result is negative, the vehicle is not in the active acceleration state at the moment, and the vehicle can be confirmed to be in the passive overspeed state. If the vehicle is in a passive overspeed state, the auxiliary brake device is controlled to start so as to perform auxiliary braking on the vehicle and reduce the rotating speed of the engine, so that the engine is prevented from being damaged due to the fact that the vehicle drags the engine reversely due to passive overspeed. If the vehicle is not in the passive overspeed state, the auxiliary braking device is controlled to be closed so as to ensure the normal running of the vehicle.
In the above technical solution, if the vehicle is in a passive overspeed state, before executing step S301, the vehicle control method further includes: step S205: judging whether the vehicle has a braking instruction according to the braking signal, and generating a third judgment result; if the third determination result is negative, execute step S301: controlling the auxiliary braking device to start; if the third determination result is yes, go to step S302: and controlling the auxiliary brake device to be closed.
According to the technical scheme, if the vehicle is in a passive overspeed state, whether the vehicle has a braking instruction or not is judged according to the braking signal so as to determine whether the vehicle is in a braking state at the moment. If the third judgment result is yes, namely the vehicle receives the braking instruction at the moment and is in a braking state, the auxiliary braking device does not need to be started again at the moment; if the third judgment result is not negative, namely the vehicle is not in a braking state at the moment, the auxiliary braking device is controlled to be started at the moment to perform auxiliary braking on the vehicle so as to reduce the rotating speed of the engine, so that the passive overspeed phenomenon caused by improper operation or untimely operation of a driver can be effectively prevented, the possibility of damage to the engine is reduced, and the safety of the vehicle in the driving process is improved.
In the above technical solution, if the third determination result is yes, before executing step S302, the control method further includes: step S206: acquiring a second rotating speed signal of the engine; step S207: judging whether the second rotating speed of the engine is greater than a safe rotating speed threshold value or not, and generating a fourth judgment result; if the fourth determination result is yes, step S301 is executed: controlling the auxiliary braking device to start; if the fourth determination result is negative, execute step S302: and controlling the auxiliary brake device to be closed.
In the technical scheme, when the third judgment result is yes, namely the vehicle is in a braking state, whether the passive overspeed state of the vehicle is relieved or not is determined by acquiring the second rotating speed signal of the engine and judging whether the second rotating speed of the engine is greater than the safe rotating speed threshold value or not, and comparing the magnitude relation between the second rotating speed of the engine and the safe rotating speed threshold value, and a fourth judgment result is generated. If the fourth judgment result is yes, namely the second rotating speed of the engine is still greater than the safe rotating speed threshold value, the vehicle is still in the passive overspeed state at the moment, the auxiliary braking device is controlled to be started at the moment, the vehicle is subjected to auxiliary braking, the braking force is further increased, the rotating speed reduction speed of the engine is accelerated, the vehicle can be promoted to be relieved from the passive overspeed state as soon as possible, and the safety of the vehicle in the driving process is further improved.
In the above technical solution, in step S301: after controlling the auxiliary braking device to be activated, the vehicle control method further includes: step S401: acquiring a third rotating speed signal of the engine; step S402: judging whether the third rotating speed is greater than the safe rotating speed threshold value or not, and generating a fifth judgment result; if the fifth determination result is yes, step S403 is executed: controlling the vehicle to send an alarm prompt; if the fifth determination result is negative, go to step S302: and controlling the auxiliary brake device to be closed.
In the technical scheme, after the auxiliary braking device is controlled to be started, whether the passive overspeed state of the vehicle is relieved or not is determined by acquiring a third rotating speed signal of the engine and judging whether the third rotating speed of the engine is greater than a safe rotating speed threshold value or not, and comparing the magnitude relation between the third rotating speed of the engine and the safe rotating speed threshold value, and a fifth judgment result is generated. If the fifth judgment result is yes, the vehicle is still in a passive overspeed state, and the vehicle is controlled to send an alarm prompt to remind a driver of taking braking measures in time so as to prevent the vehicle from damaging the engine due to inertia. If the fifth judgment result is negative, the vehicle is judged to have released the passive overspeed state, and at the moment, the auxiliary braking device is controlled to be closed, braking measures are stopped, and the vehicle is enabled to return to the normal running state. Wherein, the alarm prompt includes but is not limited to voice prompt, flashing alarm light, and buzzer alarm.
In a second aspect of the present invention, there is provided a vehicle control system, including: the detecting component is used for detecting a parameter signal of the vehicle; an auxiliary brake device provided corresponding to a wheel of the vehicle; the controller is arranged in the vehicle and is electrically connected with the detection assembly and the auxiliary braking device so as to control the running state of the auxiliary braking device according to the parameter signals detected by the detection assembly, wherein the parameter signals at least comprise a first rotating speed signal, an accelerator position signal and a braking signal of the engine.
According to a second aspect of the invention, a vehicle control system includes a detection assembly, an auxiliary brake device, and a controller. The detection component detects parameter signals of the vehicle and is used for determining the current running state of the vehicle, wherein the parameter signals at least comprise a first rotating speed signal, a throttle position signal and a brake signal of the engine. The auxiliary braking device is arranged corresponding to the wheels of the vehicle and is used for carrying out auxiliary braking on the vehicle. The controller is arranged in the vehicle, is electrically connected with the detection assembly and the auxiliary braking device, receives the parameter signal of the vehicle detected by the detection assembly, determines the running state of the vehicle according to the parameter signal of the vehicle, and further correspondingly controls the auxiliary braking device, so that when the vehicle is in a passive overspeed state, the running speed of the vehicle is reduced through the auxiliary braking device, the rotating speed of the engine is further reduced, and the engine is prevented from being damaged. The controller comprises a processor and a memory, the memory stores a computer program, the computer program can be run in the processor, the processor controls the detection assembly and the auxiliary brake device to work by executing the computer program, so that a vehicle control system is operated, and the new vehicle control system is enabled to realize the vehicle control method according to any one of the above technical schemes of the first aspect, thereby effectively preventing the engine from being damaged due to the passive overspeed phenomenon of the vehicle during running. In addition, the present solution should also have all the beneficial effects of any one of the vehicle control methods in the above-mentioned first aspect, and details are not repeated here.
In the above technical solution, the detecting component includes: the accelerator sensor is connected with an accelerator of the vehicle and used for detecting a position signal of the accelerator; a brake sensor provided corresponding to a brake pedal of a main brake device of a vehicle, for detecting a position signal of the brake pedal; and the engine rotating speed sensor is arranged on the engine and used for detecting a rotating speed signal of the engine, wherein the accelerator sensor, the brake sensor and the engine rotating speed sensor are electrically connected with the controller through a local area network controller bus of the vehicle.
In this technical scheme, the detection subassembly includes throttle sensor, brake sensor and engine speed sensor, all is connected with the controller electricity through setting up throttle sensor, brake sensor and engine speed sensor to in transmit detected signal to the controller. Specifically, the accelerator sensor is connected with an accelerator of the vehicle and used for detecting a position signal of the accelerator, so that the controller judges whether the vehicle is in an active acceleration state or not according to the position of the accelerator. The brake sensor is arranged corresponding to a brake pedal of a main brake device of the vehicle and used for detecting a position signal of the brake pedal, so that the controller judges whether the vehicle is in a braking state or not according to the position of the brake pedal. The engine speed sensor is arranged on the engine and used for detecting a speed signal of the engine so as to facilitate the controller to judge whether the speed of the engine exceeds a safe speed threshold. The controller determines the current running state of the vehicle, namely whether the vehicle is in a passive overspeed state and whether the vehicle takes braking measures or not according to the accelerator position signal, the brake pedal position signal and the engine speed signal of the vehicle, and then performs corresponding control operation on the auxiliary braking device. The accelerator sensor, the brake sensor, the engine speed sensor and the Controller are connected through a Controller Area Network (CAN) bus of the vehicle, so that the speed of data transmission is improved, the response speed is high, no additional connecting line is needed, and the simplification of the connecting line is facilitated. .
In the above technical solution, the vehicle control system further includes: and the alarm device is arranged in a cab of the vehicle and is electrically connected with the controller so as to send out an alarm prompt according to an instruction of the controller.
In the technical scheme, the alarm device is arranged in the cab of the vehicle and used for giving out an alarm prompt so as to prompt a driver. The alarm device is electrically connected with the controller, so that the controller can control the alarm device to send out corresponding alarm prompts according to the specific running state of the vehicle, and when the vehicle is in a passive overspeed state, a driver is timely reminded to take braking measures, the engine is prevented from being damaged, and the safety of the vehicle in the running process is improved.
In the technical scheme, the controller is a vehicle controller or an engine controller carried by the vehicle.
In the technical scheme, the controller is a Vehicle Controller Unit (VCU) or an Engine Controller (ECU) provided by the Vehicle, so that the existing equipment of the Vehicle can be used for controlling the Vehicle Control system to operate, the passive overspeed phenomenon of the Vehicle is prevented, a special Control device is not required to be additionally assembled, the Control can be realized only by installing a corresponding computer program on the Vehicle controller or the engine controller of the Vehicle, the manufacturing cost of the whole Vehicle is reduced, and the realization difficulty of the Vehicle Control system is reduced.
In a third aspect of the present invention, an automobile is provided, including: a vehicle body having a travel system; the engine is arranged in the vehicle body and is in transmission connection with the running system so as to drive the vehicle body to run; the vehicle control system according to any one of the second aspect of the present invention is provided on a vehicle body, and the controller in the vehicle control system controls the operating state of the auxiliary brake device in the vehicle control system based on parameter signals of the vehicle body and the engine.
According to a third aspect of the present invention, an automobile includes a vehicle body, an engine, and the vehicle control system of any one of the second aspect described above. The vehicle body is provided with a running system, and an engine in transmission connection with the running system is arranged in the vehicle body to provide power for the running system and drive the vehicle body to run. The vehicle control system of any one of the second technical scheme is arranged on the vehicle body, so that a controller in the vehicle control system can determine the running state of the vehicle according to parameter signals of the vehicle body and the engine, and control the running state of an auxiliary braking device in the vehicle control system, so that when the vehicle is in a passive overspeed state, the auxiliary braking device is controlled to be started, the running speed of the vehicle body is reduced, the rotating speed of the engine is further reduced, and the engine is prevented from being damaged due to the inertia effect of the vehicle body. The effect is more obvious especially when the automobile is a heavy vehicle such as a cargo vehicle, an engineering vehicle and the like. In addition, the automobile in the present solution should have all the beneficial effects of the vehicle control system in the above second aspect, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a flow chart of a vehicle control method according to one embodiment of the invention;
FIG. 2 shows a flow chart of a vehicle control method according to an embodiment of the invention;
FIG. 3 shows a flow chart of a vehicle control method according to an embodiment of the invention;
FIG. 4 shows a flow chart of a vehicle control method according to an embodiment of the invention;
FIG. 5 shows a flow chart of a vehicle control method according to an embodiment of the invention;
FIG. 6 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 7 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 8 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 9 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 10 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 11 shows a block diagram of a vehicle control system according to an embodiment of the invention;
FIG. 12 shows a block diagram of an automobile according to one embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A vehicle control method, a vehicle control system, and an automobile according to some embodiments of the invention are described below with reference to fig. 1 to 12.
Example one
The present embodiment provides a vehicle control method, as shown in fig. 1, including the steps of:
step S10: acquiring a parameter signal of a vehicle;
step S20: determining the running state of the vehicle according to the parameter signal;
step S30: controlling an operation state of an auxiliary brake device of the vehicle according to a running state of the vehicle,
wherein the parameter signals include at least a first speed signal, a throttle position signal and a brake signal of the engine.
In the embodiment, the current running state of the vehicle is determined according to the parameter signal of the vehicle, so as to judge whether the vehicle is in a passive overspeed state, and further control the running state of an auxiliary braking device of the vehicle, so that when the vehicle is determined to be in the passive overspeed state, the auxiliary braking device is controlled to be started, the vehicle is subjected to auxiliary braking, the rotating speed of the engine is reduced, and the rotating speed of the engine is restored to be within a safe rotating speed range, so that the damage of the engine caused by the back dragging of the engine due to inertia of the vehicle is prevented.
Example two
The present embodiment provides a vehicle control method, as shown in fig. 2, including the steps of:
step S10: acquiring a parameter signal of a vehicle;
step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to a first rotating speed signal of the engine to generate a first judgment result, if so, executing step S202, and if not, executing step S203 and step S302;
step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal to generate a second judgment result, if so, executing the step S203 and the step S302, and if not, executing the step S204 and the step S301;
step S203: confirming that the vehicle is not in a passive overspeed state;
step S204: confirming that the vehicle is in a passive overspeed state;
step S301: controlling the auxiliary braking device to start;
step S302: the auxiliary braking device is controlled to be closed,
wherein the parameter signals include at least a first speed signal, a throttle position signal and a brake signal of the engine.
The vehicle control method provided by the embodiment further improves the steps S20 and S30 on the basis of the first embodiment. Whether the current rotating speed of the engine exceeds the safe rotating speed threshold value or not is determined according to the magnitude relation between the first rotating speed of the engine and the safe rotating speed threshold value, and whether the vehicle is overspeed caused by active acceleration of a driver or not is determined by judging whether the vehicle has an acceleration instruction or not when the rotating speed of the engine exceeds the safe rotating speed threshold value. If the vehicle does not receive an acceleration command and the first rotational speed threshold of the engine is greater than the safe rotational speed threshold, it may be determined that the vehicle is in a passive overspeed state. The auxiliary brake device is controlled to be started to perform auxiliary braking on the vehicle, and the rotating speed of the engine is reduced, so that the engine is prevented from being damaged due to the fact that the vehicle drags the engine reversely due to passive overspeed.
EXAMPLE III
The present embodiment provides a vehicle control method, as shown in fig. 3, including the steps of:
step S10: acquiring a parameter signal of a vehicle;
step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to a first rotating speed signal of the engine to generate a first judgment result, if so, executing step S202, and if not, executing step S203 and step S302;
step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal to generate a second judgment result, if so, executing the step S203 and the step S302, and if not, executing the step S204 and the step S205;
step S203: confirming that the vehicle is not in a passive overspeed state;
step S204: confirming that the vehicle is in a passive overspeed state;
step S205: judging whether a vehicle has a braking instruction according to the braking signal, generating a third judgment result, if so, executing step S302, and if not, executing step S301;
step S301: controlling the auxiliary braking device to start;
step S302: the auxiliary braking device is controlled to be closed,
wherein the parameter signals include at least a first speed signal, a throttle position signal and a brake signal of the engine.
The vehicle control method provided by the present embodiment is added with step S205 in addition to the second embodiment. When the vehicle is in a passive overspeed state, judging whether the vehicle has a braking instruction according to the braking signal so as to determine whether the vehicle is in a braking state, and if the vehicle is in the braking state, restarting an auxiliary braking device; if the vehicle is not in a braking state, the auxiliary braking device is controlled to be started to perform auxiliary braking on the vehicle, so that the passive overspeed phenomenon caused by improper operation or untimely operation of a driver is prevented.
Example four
The present embodiment provides a vehicle control method, as shown in fig. 4, including the steps of:
step S10: acquiring a parameter signal of a vehicle;
step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to a first rotating speed signal of the engine to generate a first judgment result, if so, executing step S202, and if not, executing step S203 and step S302;
step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal to generate a second judgment result, if so, executing the step S203 and the step S302, and if not, executing the step S204 and the step S205;
step S203: confirming that the vehicle is not in a passive overspeed state;
step S204: confirming that the vehicle is in a passive overspeed state;
step S205: judging whether the vehicle has a braking instruction according to the braking signal, generating a third judgment result, if the third judgment result is yes, executing the step S206 and the step S207, and if the third judgment result is no, executing the step S301;
step S206: acquiring a second rotating speed signal of the engine;
step S207: judging whether the second rotating speed of the engine is greater than a safe rotating speed threshold value or not, generating a fourth judgment result, if so, executing step S301, and if not, executing step S302;
step S301: controlling the auxiliary braking device to start;
step S302: the auxiliary braking device is controlled to be closed,
wherein the parameter signals include at least a first speed signal, a throttle position signal and a brake signal of the engine.
The vehicle control method provided by the embodiment is further improved on the basis of the third embodiment, and step S206 and step S207 are added. And when the vehicle is in a braking state, determining whether the vehicle releases the passive overspeed state or not by comparing the magnitude relation between the second rotating speed of the engine and the safe rotating speed threshold value. And if the second rotating speed of the engine is still greater than the safe rotating speed threshold value, controlling the auxiliary braking device to start, and performing auxiliary braking on the vehicle to further increase the braking force and accelerate the rotating speed reduction speed of the engine.
EXAMPLE five
The present embodiment provides a vehicle control method, as shown in fig. 5, including the steps of:
step S10: acquiring a parameter signal of a vehicle;
step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to a first rotating speed signal of the engine to generate a first judgment result, if so, executing step S202, and if not, executing step S203 and step S302;
step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal to generate a second judgment result, if so, executing the step S203 and the step S302, and if not, executing the step S204 and the step S205;
step S203: confirming that the vehicle is not in a passive overspeed state;
step S204: confirming that the vehicle is in a passive overspeed state;
step S205: judging whether a vehicle has a braking instruction according to the braking signal, generating a third judgment result, if so, executing step S302, and if not, executing step S301 and step S401;
step S301: controlling the auxiliary braking device to start;
step S302: controlling the auxiliary brake device to be closed;
step S401: acquiring a third rotating speed signal of the engine;
step S402: judging whether the third rotating speed is greater than the safe rotating speed threshold value or not, generating a fifth judgment result, if so, executing the step S403, and if not, executing the step S302;
step S403: the vehicle is controlled to send out an alarm prompt,
wherein the parameter signals include at least a first speed signal, a throttle position signal and a brake signal of the engine.
The vehicle control method provided by the embodiment is further improved on the basis of the third embodiment, and steps S401 to S403 are added. After the auxiliary braking device is controlled to be started, whether the passive overspeed state of the vehicle is relieved or not is determined by judging whether the third rotating speed of the engine is greater than a safe rotating speed threshold value or not, and if the vehicle is still in the passive overspeed state, an alarm prompt is sent out by controlling the vehicle to remind a driver of taking braking measures in time so as to prevent the engine from being damaged due to inertia effect of the vehicle. Wherein, the alarm prompt includes but is not limited to voice prompt, flashing alarm light, and buzzer alarm. And controlling the auxiliary brake device to be closed if the third rotating speed of the engine is lower than the safe rotating speed threshold value.
EXAMPLE six
The present embodiment provides a vehicle control system, as shown in fig. 6, including a detection assembly, an auxiliary braking device, and a controller. The detection component is used for detecting a parameter signal of the vehicle and comprises a plurality of different detection devices so as to obtain a plurality of parameter signals of the vehicle and provide basis for the controller to determine the current running state of the vehicle, wherein the parameter signals at least comprise a first rotating speed signal, an accelerator position signal and a brake signal of the engine. The auxiliary braking device is arranged corresponding to the wheels of the vehicle and is used for carrying out auxiliary braking on the vehicle. The controller is electrically connected with the detection assembly and the auxiliary braking device to receive the parameter signals of the vehicle detected by the detection assembly, determine the running state of the vehicle according to the parameter signals of the vehicle and further control the auxiliary braking device correspondingly. Specifically, when the vehicle is in a passive overspeed state, the controller controls the auxiliary brake device to start, so that the running speed of the vehicle is reduced, the rotating speed of the engine is further reduced, the rotating speed of the engine is restored to a safe rotating speed range, and the engine is prevented from being damaged due to the fact that the vehicle drags the engine reversely due to inertia. The controller comprises a processor and a memory, the memory stores a computer program, the computer program can be operated in the processor, the processor controls the work of the detection assembly and the auxiliary brake device through executing the computer program, so that a vehicle control system is operated, and the new vehicle control system is enabled to realize the vehicle control method in any one of the embodiments, thereby effectively preventing the engine from being damaged due to the passive overspeed phenomenon of the vehicle during running. In addition, the present solution should also have all the beneficial effects of the vehicle control method in any of the above embodiments, and details are not repeated herein.
The controller may be a control device provided separately or may be a control device provided in the vehicle.
EXAMPLE seven
The embodiment provides a vehicle control system, which comprises a detection assembly, an auxiliary braking device and a controller, wherein the detection assembly and the auxiliary braking device are electrically connected with the controller.
As shown in fig. 7, the detecting component is used for detecting parameter signals of the vehicle, and specifically includes an engine speed sensor, a throttle sensor and a brake sensor. The engine speed sensor is arranged on the engine and used for detecting a speed signal of the engine; the accelerator sensor is connected with the accelerator of the vehicle to detect a position signal of the accelerator of the vehicle; the brake sensor is provided corresponding to a brake pedal of a service brake device of the vehicle to detect a position signal of the brake pedal. The controller is provided with a basis for determining the current running state of the vehicle by acquiring the parameter signals of the vehicle and transmitting the acquired parameter signals to the controller.
The auxiliary braking device is arranged corresponding to the wheels of the vehicle and is used for carrying out auxiliary braking on the vehicle. The controller determines the engine speed, the vehicle acceleration instruction and the vehicle braking instruction according to the received engine speed signal, the accelerator position signal and the braking signal, further determines the running state of the vehicle, and correspondingly controls the auxiliary braking device according to the running state of the vehicle. Specifically, when the vehicle is in a passive overspeed state, the controller controls the auxiliary brake device to start, so that the running speed of the vehicle is reduced, the rotating speed of the engine is further reduced, the rotating speed of the engine is restored to a safe rotating speed range, and the engine is prevented from being damaged due to the fact that the vehicle drags the engine reversely due to inertia. The controller comprises a processor and a memory, the memory stores a computer program, the computer program can be operated in the processor, the processor controls the work of the detection assembly and the auxiliary brake device through executing the computer program, so that a vehicle control system is operated, and the new vehicle control system is enabled to realize the vehicle control method in any one of the embodiments, thereby effectively preventing the engine from being damaged due to the passive overspeed phenomenon of the vehicle during running.
Further, as shown in fig. 8, the engine speed sensor, the accelerator sensor, the brake sensor, and the auxiliary brake device are electrically connected to the Controller through a Controller Area Network (CAN) bus of the vehicle.
Example eight
The vehicle control system provided in this embodiment, as shown in fig. 9, includes a detection assembly, an auxiliary braking device, a controller, and an alarm device, where the detection assembly, the auxiliary braking device, and the alarm device are all electrically connected to the controller.
The detection component is used for detecting a parameter signal of the vehicle and comprises a plurality of different detection devices so as to obtain a plurality of parameter signals of the vehicle and provide basis for the controller to determine the current running state of the vehicle, wherein the parameter signals at least comprise a first rotating speed signal, an accelerator position signal and a brake signal of the engine. The auxiliary braking device is arranged corresponding to the wheels of the vehicle and is used for carrying out auxiliary braking on the vehicle.
The controller receives the parameter signal of the vehicle detected by the detection component, determines the running state of the vehicle according to the parameter signal of the vehicle, and then correspondingly controls the auxiliary braking device. Specifically, when the vehicle is in a passive overspeed state, the controller controls the auxiliary brake device to start, so that the running speed of the vehicle is reduced, the rotating speed of the engine is further reduced, the rotating speed of the engine is restored to a safe rotating speed range, and the engine is prevented from being damaged due to the fact that the vehicle drags the engine reversely due to inertia. The controller comprises a processor and a memory, the memory stores a computer program, the computer program can be operated in the processor, the processor controls the work of the detection assembly and the auxiliary brake device through executing the computer program, so that a vehicle control system is operated, and the new vehicle control system is enabled to realize the vehicle control method in any one of the embodiments, thereby effectively preventing the engine from being damaged due to the passive overspeed phenomenon of the vehicle during running.
The alarm device is arranged in a cab of the vehicle and used for sending out an alarm prompt according to an instruction of the controller. Specifically, when the vehicle is in a passive overspeed state, the controller controls the auxiliary braking device to be started to reduce the vehicle speed, and then the controller acquires the speed signal of the engine again through the detection component to determine whether the engine speed is reduced below a safe speed threshold value. At the moment, the controller sends a control instruction to the alarm device, and controls the alarm device to send an alarm prompt so as to remind a driver to take braking measures in time and operate a main braking device of the vehicle to brake so as to increase the braking force of the vehicle. Wherein, the alarm prompt includes but is not limited to voice prompt, flashing alarm light, and buzzer alarm.
Further, the controller in this embodiment may be a Vehicle Controller Unit (VCU) or an Engine Controller (ECU) of the Vehicle.
Example nine
The embodiment of the invention provides a vehicle control system, as shown in fig. 10, which includes a detection assembly, an auxiliary braking device, a controller and an alarm device, where the controller is a vehicle controller of a vehicle, and the detection assembly, the auxiliary braking device and the alarm device are all electrically connected to the vehicle controller through a controller area network bus of the vehicle.
The detection assembly is used for detecting parameter signals of a vehicle and specifically comprises an engine rotating speed sensor, an accelerator sensor and a brake sensor. The engine speed sensor is arranged on the engine and used for detecting a speed signal of the engine; the accelerator sensor is connected with the accelerator of the vehicle to detect a position signal of the accelerator of the vehicle; the brake sensor is provided corresponding to a brake pedal of a service brake device of the vehicle to detect a position signal of the brake pedal. The parameter signals are acquired and transmitted to the vehicle control unit, so that a basis is provided for the vehicle control unit to determine the current running state of the vehicle.
The auxiliary braking device is arranged corresponding to the wheels of the vehicle and is used for carrying out auxiliary braking on the vehicle. The vehicle control unit determines the engine speed, the vehicle acceleration instruction and the vehicle braking instruction according to the received engine speed signal, the accelerator position signal and the braking signal, determines the running state of the vehicle according to the parameter signals, and controls the auxiliary braking device correspondingly according to the running state of the vehicle. Specifically, when the vehicle is in a passive overspeed state, the vehicle control unit controls the auxiliary braking device to start, so that the running speed of the vehicle is reduced, the rotating speed of the engine is further reduced, the rotating speed of the engine is restored to a safe rotating speed range, and the engine is prevented from being damaged due to the fact that the vehicle reversely drags the engine under the inertia effect. The vehicle control system comprises a vehicle control system, a vehicle control system and a vehicle control system, wherein the vehicle control system comprises a vehicle control system, a vehicle control system and a vehicle control system, the vehicle control system comprises a vehicle control system, a vehicle control system and a vehicle control system, the vehicle control system comprises a processor and a memory, the memory stores a computer program, the computer program can run in the processor, the processor controls the detection assembly and the auxiliary braking device to work by executing the computer program, so that the vehicle control system runs, the vehicle control system can realize the vehicle control method in any one of the above embodiments, and therefore the damage to an engine caused by the passive overspeed phenomenon of the vehicle in the running process can be effectively prevented.
The alarm device is arranged in a cab of the vehicle and used for sending out an alarm prompt according to an instruction of the vehicle controller. Specifically, after the vehicle is in a passive overspeed state and the auxiliary braking device is activated, if the engine speed is still higher than the safe speed threshold, it indicates that the vehicle is traveling too fast, and the engine speed cannot be quickly restored below the safe speed threshold by the braking action of the auxiliary braking device alone. At the moment, the vehicle control unit sends a control instruction to the alarm device, controls the alarm device to send an alarm prompt to remind a driver to take braking measures in time, and operates a main braking device of the vehicle to brake so as to increase the braking force of the vehicle and reduce the running speed of the vehicle as soon as possible. Wherein, the alarm prompt includes but is not limited to voice prompt, flashing alarm light, and buzzer alarm.
In another implementation manner of the present embodiment, as shown in fig. 11, the controller may also be an engine controller of the vehicle, and the technical effects in the present embodiment may also be achieved.
Example ten
The present embodiment provides an automobile, as shown in fig. 12, including a vehicle body, an engine, and the vehicle control system of any one of the sixth to ninth embodiments described above. The engine and the vehicle control system are arranged on the vehicle body, and the engine is in transmission connection with the running system of the vehicle body so as to drive the vehicle body to run. The detection assembly in the vehicle control system is used for detecting parameter signals of a vehicle body and an engine, and the controller in the vehicle control system determines the running state of the vehicle according to the parameter signals so as to control the running state of the auxiliary braking device according to the running state of the vehicle, and controls the auxiliary braking device to be started when the vehicle is in a passive overspeed state, so that the vehicle body is subjected to auxiliary braking, the running speed is reduced, and the vehicle body is prevented from dragging the engine reversely under the inertia effect to cause the damage of the engine. In addition, the automobile in this embodiment should have all the advantages of the vehicle control system in any one of the sixth to ninth embodiments, which are not described herein again.
The technical scheme of the invention is explained in detail in the above with the accompanying drawings, the running speed of the vehicle can be controlled according to the running state of the vehicle, so that the passive overspeed phenomenon in the running process of the vehicle can be prevented, the damage of the engine caused by the reverse dragging of the engine by the vehicle due to the inertia effect can be effectively reduced, the running safety of the vehicle can be improved, and the use cost of the vehicle can be reduced.
In the present invention, it will be understood that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A vehicle control method characterized by comprising:
step S10: acquiring a parameter signal of a vehicle;
step S20: determining the running state of the vehicle according to the parameter signal;
step S30: controlling an operation state of an auxiliary brake device of the vehicle according to a running state of the vehicle,
wherein the parameter signals comprise at least a first speed signal, a throttle position signal and a brake signal of the engine;
the step S30: the method for controlling the running state of the auxiliary braking device of the vehicle according to the running state of the vehicle specifically comprises the following steps:
if the vehicle is in the passive overspeed state, executing step S301: controlling the auxiliary braking device to start;
if the vehicle is not in the passive overspeed state, executing step S302: controlling the auxiliary brake device to be closed;
if the vehicle is in the passive overspeed state, before executing step S301, the vehicle control method further includes:
step S205: judging whether the vehicle has a braking instruction according to the braking signal to generate a third judgment result;
if the third determination result is negative, step S301 is executed: controlling the auxiliary braking device to start;
if the third determination result is yes, step S302 is executed: controlling the auxiliary brake device to be closed;
if the third determination result is yes, before executing step S302, the control method further includes:
step S206: acquiring a second rotating speed signal of the engine;
step S207: judging whether the second rotating speed of the engine is greater than a safe rotating speed threshold value or not, and generating a fourth judgment result;
if the fourth determination result is yes, step S301 is executed: controlling the auxiliary braking device to start;
if the fourth determination result is negative, execute step S302: controlling the auxiliary brake device to be closed;
in the step S301: after controlling the auxiliary braking device to be activated, the vehicle control method further includes:
step S401: acquiring a third rotating speed signal of the engine;
step S402: judging whether the third rotating speed is greater than the safe rotating speed threshold value or not, and generating a fifth judgment result;
if the fifth determination result is yes, go to step S403: controlling the vehicle to send an alarm prompt;
if the fifth determination result is negative, execute step S302: and controlling the auxiliary brake device to be closed.
2. The vehicle control method according to claim 1,
the step S20: determining the running state of the vehicle according to the parameter signal, which specifically comprises:
step S201: judging whether the first rotating speed of the engine is greater than a safe rotating speed threshold value or not according to the first rotating speed signal of the engine to generate a first judgment result;
if the first determination result is yes, execute step S202: judging whether the vehicle has an acceleration instruction according to the accelerator position signal, and generating a second judgment result;
if the first determination result is negative, execute step S203: confirming that the vehicle is not in a passive overspeed state;
if the second determination result is yes, step S203 is executed: confirming that the vehicle is not in a passive overspeed state;
if the second determination result is negative, execute step S204: confirming that the vehicle is in a passive overspeed state.
3. A vehicle control system, characterized by comprising:
the detecting component is used for detecting a parameter signal of the vehicle;
an auxiliary brake device provided corresponding to a wheel of the vehicle;
the controller is arranged in the vehicle, is electrically connected with the detection component and the auxiliary braking device and controls the running state of the auxiliary braking device according to the parameter signal detected by the detection component,
wherein the parameter signals comprise at least a first speed signal, a throttle position signal and a brake signal of the engine;
wherein the controller comprises a processor and a memory, the memory having stored therein a computer program operable on the processor, the processor controlling the operation of the detection assembly and the auxiliary braking device by executing the computer program to operate the vehicle control system and to cause the vehicle control system to carry out the steps of the vehicle control method according to claim 1 or 2.
4. The vehicle control system of claim 3, wherein the detection assembly comprises:
the accelerator sensor is connected with an accelerator of the vehicle and used for detecting a position signal of the accelerator;
a brake sensor provided corresponding to a brake pedal of a main brake device of the vehicle, for detecting a position signal of the brake pedal;
an engine speed sensor arranged on the engine and used for detecting a speed signal of the engine,
wherein the throttle sensor, the brake sensor, and the engine speed sensor are electrically connected to the controller via a local area network controller bus of the vehicle.
5. The vehicle control system according to claim 3, characterized by further comprising:
and the alarm device is arranged in a cab of the vehicle and electrically connected with the controller so as to send out an alarm prompt according to the instruction of the controller.
6. The vehicle control system according to claim 3,
the controller is a vehicle controller or an engine controller carried by the vehicle.
7. An automobile, comprising:
a vehicle body having a travel system;
the engine is arranged in the vehicle body and is in transmission connection with the running system so as to drive the vehicle body to run;
the vehicle control system according to any one of claims 3 to 6, provided on the vehicle body, wherein a controller in the vehicle control system controls an operation state of an auxiliary brake device in the vehicle control system based on parameter signals of the vehicle body and the engine.
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| CN113202646A (en) * | 2021-05-31 | 2021-08-03 | 东风商用车有限公司 | Engine overspeed protection control method, device, storage medium and system |
| CN113511182A (en) * | 2021-05-31 | 2021-10-19 | 重庆长安汽车股份有限公司 | EPBi emergency braking control method and device and automobile |
| CN113619387A (en) * | 2021-08-31 | 2021-11-09 | 三一专用汽车有限责任公司 | Engine overspeed control method and device, vehicle and vehicle overspeed control method |
| CN114148314A (en) * | 2021-11-18 | 2022-03-08 | 三一专用汽车有限责任公司 | Vehicle control method, vehicle control system and vehicle |
| CN114198478B (en) * | 2021-12-14 | 2023-09-22 | 三一专用汽车有限责任公司 | Differential lock control method, controller thereof and engineering vehicle |
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