Long downhill control method and device and storage medium

Abstract

The invention discloses a long downhill control method and device and a storage medium. The long downhill control method and device are used for activating an auxiliary braking device when a vehicle does not decelerate during long downhill. The method comprises the steps that engine rotating speed information is obtained; when the engine rotating speed information shows that the engine rotating speed reaches a first preset threshold value, accelerator opening degree information is obtained; when the accelerator opening degree information shows that the accelerator opening degree is 0, it is determined that the vehicle enters the long downhill road section, and energy recovery processing is conducted on the vehicle; continuously detecting the rotating speed of the engine; when the rotating speed of the engine reaches a second preset threshold value and the opening degree of the accelerator is still zero, an auxiliary braking control signal is automatically output through the controller, and an auxiliary braking device is activated; and when the rotating speed of the engine reaches a third preset threshold value and the opening degree of the accelerator is still zero, determining that the braking capacity of the vehicle is insufficient and the vehicle is in a dangerous state, and starting vehicle energy consumption processing through a controller so as to provide auxiliary braking.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a long downhill control method, device and storage medium. Background Art

[0002] As the core power supply device of the car, the engine plays a vital role in the overall performance of the car. It has a decisive influence on many key performance indicators of the car, such as power, economy, stability and environmental protection. From the perspective of power source, there are many different types of car engines.

[0003] When a vehicle encounters a long downhill slope during driving, the driver usually needs to step on the brakes or manually control the engine brake to reduce or maintain the vehicle speed through the friction loss of the high-speed movement of the engine to ensure driving safety. Once the engine speed of a moving vehicle is too fast, it will not only cause damage to the machine itself, but may even threaten the operator or people around.

[0004] Usually the engine is equipped with an auxiliary brake device, but the driver needs to actively press the brake switch to activate the auxiliary brake device according to the road conditions and driving needs to achieve efficient braking of the vehicle, which is highly dependent on the driver. When the slope is large, if the auxiliary brake device is not activated and the brake is not applied, the engine may be damaged due to the speed exceeding the limit. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a long downhill control method, device and storage medium.

[0006] The technical solution provided in this application is described below:

[0007] The first aspect of the present application provides a long downhill control method, the method comprising:

[0008] Get engine speed information;

[0009] When the engine speed information shows that the engine speed reaches a first preset threshold, acquiring throttle opening information;

[0010] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and energy recovery is performed on the vehicle;

[0011] Continuously monitor engine speed;

[0012] When the engine speed reaches a second preset threshold and the throttle opening is still 0, the controller automatically outputs an auxiliary brake control signal to activate the auxiliary brake device, and the second preset threshold is greater than the first preset threshold;

[0013] When the engine speed reaches the third preset threshold and the throttle opening is still 0, it is determined that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state. The vehicle energy consumption processing is started through the controller to provide auxiliary braking. The third preset threshold is greater than the second preset threshold.

[0014] Optionally, when the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and energy recovery processing is performed on the vehicle, including:

[0015] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and the controller automatically outputs power generation and air pumping control signals to the engine, which is equipped with an electronically controlled air compressor and an electronically controlled generator;

[0016] The electronically controlled air compressor and the electronically controlled generator are controlled according to the power generation and inflation control signals to recover the energy generated by downhill slope.

[0017] Optionally, the engine is equipped with an electronically controlled fan, electronically controlled water pump, electronically controlled oil pump and electronically controlled air conditioning;

[0018] When the engine speed reaches the third preset threshold value n3 and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state, and the vehicle energy consumption process is started by the controller to provide auxiliary braking, including:

[0019] When the engine speed reaches the third preset threshold value n3 and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state;

[0020] The controller controls the electric fan, electric water pump, electric oil pump and electric air conditioner to participate in energy consumption to provide auxiliary braking.

[0021] Optionally, when the engine speed reaches a second preset threshold and the throttle opening is still 0, the controller automatically outputs an auxiliary braking control signal to activate the auxiliary braking device, and the long downhill control method further includes:

[0022] Obtaining engine speed data of the engine within a preset time period;

[0023] When the engine speed data shows that the engine speed continues to increase, the controller outputs a buzzer alarm signal to prompt the driver to use the foot brake for combined braking.

[0024] Optionally, when the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and after energy recovery processing is performed on the vehicle, the long downhill control method further includes:

[0025] A reminder message is sent to the driver that the vehicle has entered a long downhill section, prompting the driver to pay attention to the vehicle status.

[0026] Optionally, when the engine speed reaches the third preset threshold value n3 and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state, and the vehicle energy consumption process is started by the controller to provide auxiliary braking, the long downhill control method further includes:

[0027] Read the duration of the vehicle's braking signal when the road is on a long downhill slope. If the duration reaches the time limit, it is determined that the driver did not use engine braking;

[0028] A signal is output to the driver through the controller, prompting the driver to use engine downshifting to assist braking.

[0029] The second aspect of the present application provides a long downhill control device, comprising:

[0030] A first acquisition unit, used to acquire engine speed information;

[0031] A second acquisition unit, configured to acquire throttle opening information when the engine speed information shows that the engine speed reaches a first preset threshold;

[0032] A recovery unit is used to determine that the vehicle has entered a long downhill section when the throttle opening information shows that the throttle opening is 0, and to perform energy recovery processing on the vehicle;

[0033] A detection unit for continuously detecting the engine speed;

[0034] an activation unit, for automatically outputting an auxiliary brake control signal through a controller to activate the auxiliary brake device when the engine speed reaches a second preset threshold and the throttle opening is still 0, and the second preset threshold is greater than the first preset threshold;

[0035] A unit is provided for determining that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening is still 0, and starting the vehicle energy consumption processing through the controller to provide auxiliary braking, and the third preset threshold is greater than the second preset threshold.

[0036] Optional, recovery unit, including:

[0037] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and the controller automatically outputs power generation and air pumping control signals to the engine, which is equipped with an electronically controlled air compressor and an electronically controlled generator;

[0038] The electronically controlled air compressor and the electronically controlled generator are controlled according to the power generation and inflation control signals to recover the energy generated by downhill slope.

[0039] Optionally, the engine is equipped with an electronically controlled fan, electronically controlled water pump, electronically controlled oil pump and electronically controlled air conditioning;

[0040] Provide units including:

[0041] When the engine speed reaches the third preset threshold value n3 and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state;

[0042] The controller controls the electric fan, electric water pump, electric oil pump and electric air conditioner to participate in energy consumption to provide auxiliary braking.

[0043] Optional, long descent control also includes:

[0044] A third acquisition unit, used to acquire engine speed data of the engine within a preset time period;

[0045] The alarm unit is used to output a buzzer alarm signal through the controller when the engine speed data shows that the engine speed continues to increase, so as to prompt the driver to use the foot brake for combined braking.

[0046] Optional, long descent control also includes:

[0047] The first prompting unit is used to send a prompting message to the driver that the vehicle has entered a long downhill section, so as to prompt the driver to pay attention to the vehicle status.

[0048] Optional, long descent control also includes:

[0049] A determination unit, used to read the duration of the vehicle's braking signal when the road is on a long downhill slope, and if the duration reaches a time limit, it is determined that the driver does not use engine braking;

[0050] The second prompting unit is used to output a signal to the driver through the controller, prompting the driver to use engine downshifting to assist braking.

[0051] A third aspect of the present application provides a long downhill control device, the device comprising:

[0052] Processor, memory, input-output unit, and bus;

[0053] The processor is connected to the memory, the input and output unit, and the bus;

[0054] The memory stores a program, and the processor calls the program to execute the first aspect and any optional long downhill control method in the first aspect.

[0055] A fourth aspect of the present application provides a computer-readable storage medium on which a program is stored. When the program is executed on a computer, the program executes the first aspect and any optional long downhill control method in the first aspect.

[0056] It can be seen from the above technical solutions that this application has the following advantages:

[0057] When the engine speed reaches the second preset threshold and the throttle opening is 0, the auxiliary braking device is automatically activated by the controller. The driver does not need to manually press the brake switch. The engine speed is automatically detected, which improves intelligence, reduces the probability of erroneous operation, and continuously detects the engine speed. Different measures can be automatically taken according to different engine speeds to cope with different road conditions, thereby increasing the service life of the engine and avoiding engine damage due to speed exceeding the limit speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0059] Figure 1 This is a flow chart of an embodiment of a long downhill control method in this application;

[0060] Figure 2 This is a flow chart of another embodiment of the long downhill control method in the present application;

[0061] Figure 3 This is a schematic structural diagram of an embodiment of a long downhill control device in the present application;

[0062] Figure 4 This is a schematic structural diagram of another embodiment of the long downhill control device in the present application. DETAILED DESCRIPTION

[0063] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0064] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0065] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0066] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0067] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0068] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0069] As the core power supply device of the car, the engine plays a vital role in the overall performance of the car. It has a decisive influence on many key performance indicators of the car, such as power, economy, stability and environmental protection. From the perspective of power source, there are many different types of car engines.

[0070] When a vehicle encounters a long downhill slope during driving, the driver usually needs to step on the brakes or manually control the engine brake to reduce or maintain the vehicle speed through the friction loss of the high-speed movement of the engine to ensure driving safety. Once the engine speed of a moving vehicle is too fast, it will not only cause damage to the machine itself, but may even threaten the operator or people around.

[0071] Usually the engine is equipped with an auxiliary brake device, but the driver needs to actively press the brake switch to activate the auxiliary brake device according to the road conditions and driving needs to achieve efficient braking of the vehicle, which is highly dependent on the driver. When the slope is large, if the auxiliary brake device is not activated and the brake is not applied, the engine may be damaged due to the speed exceeding the limit.

[0072] Based on this, the present application discloses a long downhill control method, device and storage medium for reducing the occurrence of erroneous operations and extending the service life of the engine.

[0073] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0074] The method of the present application can be applied to a server, device, terminal or other device with logical processing capabilities, and the present application does not limit this.

[0075] See also Figure 1 The present application first provides an embodiment of a long downhill control method, which comprises:

[0076] S101, obtaining engine speed information;

[0077] The engine speed information can indicate whether the engine has a fault and whether the driver's behavior is appropriate. Specifically, in the automobile engine control system, the engine speed information can be obtained through a speed sensor installed near the engine crankshaft. The speed sensor is usually an electromagnetic induction sensor. When the engine crankshaft rotates, the induction coil in the sensor cuts the magnetic field generated by the gear ring on the crankshaft, thereby generating an alternating induced electromotive force. The frequency of this induced electromotive force is proportional to the speed of the engine crankshaft. After these pulse signals are collected, amplified, filtered, and processed by the signal processing circuit in the automobile's electronic control unit, the engine speed information is obtained according to a pre-set algorithm.

[0078] S102, when the engine speed information shows that the engine speed reaches a first preset threshold, obtaining throttle opening information;

[0079] The electronic control unit of the vehicle continuously receives engine speed information from the speed sensor. Assume that the first preset threshold is set to 3000 rpm. When the electronic control unit of the vehicle detects that the engine speed reaches 3000 rpm, the electronic control unit of the vehicle sends a command to the throttle position sensor to obtain throttle opening information.

[0080] The throttle position sensor is usually a potentiometer sensor installed on the throttle body. The opening of the throttle directly reflects the opening of the throttle. When the driver steps on the accelerator pedal, the throttle will open to a certain angle accordingly, and the resistance value of the throttle position sensor will change accordingly. When the throttle is fully opened, the sensor outputs a high voltage signal, indicating that the throttle opening is 100%. It should be noted that the vehicle's electronic control unit obtains the current throttle opening information by collecting the voltage signal of the throttle position sensor.

[0081] S103, when the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and energy recovery processing is performed on the vehicle;

[0082] The vehicle's electronic control unit will continuously monitor the throttle opening information. When the vehicle's electronic control unit receives the throttle opening information and displays it as 0, the vehicle's electronic control unit will further combine other sensor information to determine whether the vehicle has entered a long downhill section. Specifically, the vehicle is equipped with a slope sensor, which can measure the slope angle of the road surface on which the vehicle is traveling. If the slope sensor detects that the road slope reaches a certain negative angle while the throttle opening is 0, the vehicle's electronic control unit determines that the vehicle has entered a long downhill section. At this time, the vehicle's electronic control unit will start energy recovery processing.

[0083] Furthermore, during the energy recovery process, the motor control system switches the vehicle's motor to generator mode. When the vehicle slides downhill due to gravity, the wheels drive the motor to rotate, and the motor starts to generate electricity as a generator. In this process, the efficiency of energy recovery can be optimized by adjusting the motor control algorithm. According to factors such as the vehicle's speed and the current battery charge, the generator output power is reasonably adjusted to ensure maximum energy recovery under the premise of safety.

[0084] S104, continuously detecting the engine speed;

[0085] During the driving process of the car, the vehicle's electronic control unit continuously detects the engine speed by establishing a communication connection with the speed sensor installed near the engine crankshaft.

[0086] The vehicle's electronic control unit has a dedicated signal processing circuit inside, which samples the pulse signal from the speed sensor at fixed time intervals. By continuously sampling and calculating the pulse signal, the vehicle's electronic control unit can continuously detect the engine speed, and can adjust the engine's fuel injection amount, ignition advance angle and other parameters in time according to changes in speed to ensure the normal operation and performance optimization of the engine.

[0087] S105, when the engine speed reaches a second preset threshold and the throttle opening is still 0, the controller automatically outputs an auxiliary braking control signal to activate the auxiliary braking device, and the second preset threshold is greater than the first preset threshold;

[0088] The electronic control unit of the vehicle is responsible for monitoring the engine speed and the throttle opening information. Assume that the second preset threshold is set to 4000 rpm.

[0089] When the vehicle is on a long downhill section, the throttle opening is 0, and the engine speed continues to rise under the action of the vehicle's gravity. The vehicle's electronic control unit continuously detects the engine speed. When it detects that the engine speed reaches 4000 rpm, the vehicle's electronic control unit, as a controller, automatically outputs an auxiliary brake control signal.

[0090] In the braking systems of different models, the auxiliary brake device can be an engine exhaust brake device or a retarder. When the vehicle's electronic control unit outputs an auxiliary brake control signal, the signal will be transmitted to the actuator of the auxiliary brake device. After receiving the signal, the actuator of the auxiliary brake device will produce a braking effect on the vehicle according to the specific type of the auxiliary brake device to prevent the vehicle from getting into a dangerous situation due to excessive engine speed during downhill.

[0091] S106. When the engine speed reaches a third preset threshold and the throttle opening is still 0, it is determined that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state. The vehicle energy consumption processing is started by the controller to provide auxiliary braking. The third preset threshold is greater than the second preset threshold.

[0092] In the control system of the electric vehicle or the hybrid vehicle, it is assumed that the third preset threshold is set to 5000 rpm.

[0093] When the vehicle is on a long downhill section, the throttle opening is 0, and the engine speed continues to rise under the action of the vehicle's gravity. When the vehicle's electronic control unit detects that the engine or motor speed reaches 5000 rpm and the throttle opening is still 0, the vehicle's electronic control unit determines that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state. At this time, the vehicle's electronic control unit starts the vehicle energy consumption process to provide auxiliary braking. Avoid the vehicle from being in danger due to insufficient braking capacity.

[0094] In this embodiment, when the engine speed reaches the second preset threshold and the throttle opening is 0, the auxiliary braking device is automatically activated by the controller. The driver does not need to manually press the brake switch. The engine speed is automatically detected, which improves intelligence, reduces the probability of erroneous operation, continuously detects the engine speed, and can automatically take different measures to cope with different road conditions according to different engine speeds, thereby increasing the service life of the engine and preventing the engine from being damaged due to the speed exceeding the limit speed.

[0095] See also Figure 2 The present application provides another embodiment of a long downhill control method, which includes:

[0096] S201, obtaining engine speed information;

[0097] In this embodiment, step S201 is similar to step S101 in the above embodiment and will not be described again here.

[0098] S202, when the engine speed information shows that the engine speed reaches a first preset threshold, obtaining throttle opening information;

[0099] In this embodiment, step S202 is similar to step S102 in the above embodiment and will not be described again here.

[0100] S203, when the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and the controller automatically outputs power generation and air pumping control signals to the engine, and the engine is equipped with an electronically controlled air compressor and an electronically controlled generator;

[0101] In the vehicle's power system, the vehicle's electronic control unit plays an important role as a controller.

[0102] When the vehicle is in a specific operating mode or meets certain conditions, the vehicle's electronic control unit will execute step S203.

[0103] For the electronically controlled air compressor configured on the engine, the vehicle's electronic control unit generates an inflation control signal based on the pre-set program and information fed back by the sensor. The inflation control signal includes the setting of the air compressor's operating parameters, such as the air compressor's speed, air intake volume, etc. The vehicle's electronic control unit then sends the inflation control signal to the electronically controlled air compressor on the engine. After receiving the signal, the electronically controlled air compressor starts or adjusts the working status according to the signal requirements.

[0104] For the electronically controlled generator, when the vehicle's electronic control unit detects that the vehicle's battery is low on power, the vehicle's electronic control unit will generate a power generation control signal based on the current state of the battery and the vehicle's power demand. The power generation control signal includes the settings for the generator's output power, power generation voltage and other parameters. The vehicle's electronic control unit sends the power generation control signal to the electronically controlled generator on the engine. After receiving the signal, the electronically controlled generator will adjust its own magnetic field strength, rotor speed and other parameters to generate electricity as required, and transmit the generated electricity to the vehicle's battery to charge the battery to meet the power demand of the vehicle's electrical system.

[0105] S204, controlling the electronically controlled air compressor and the electronically controlled generator to recover the energy generated by the downhill slope according to the power generation and air pumping control signals;

[0106] For the electronically controlled air compressor, the inflation control signal sent by the vehicle's electronic control unit will be optimized and adjusted according to the vehicle's downhill state. The inflation control signal sent by the vehicle's electronic control unit will allow the electronically controlled air compressor to use part of the downhill energy to work. Specifically, the vehicle's transmission system and the electronically controlled air compressor are connected through a specific mechanical connection. When going downhill, the vehicle's wheels drive the transmission system to rotate, and the transmission system transmits power to the electronically controlled air compressor. The electronically controlled air compressor operates at a suitable speed according to the inflation control signal, compresses the outside air and stores it in the air tank. In this process, the downhill energy that was originally wasted due to braking is partially converted into compressed air energy and stored, realizing energy recovery.

[0107] For the electronically controlled generator, the power generation control signal issued by the vehicle's electronic control unit will also be adjusted based on the energy of the downhill slope. The power generation control signal issued by the vehicle's electronic control unit requires the electronically controlled generator to use the energy of the downhill slope to generate electricity. The vehicle's wheels are connected to the electronically controlled generator through the transmission system. When going downhill, the rotation of the wheels drives the rotor of the electronically controlled generator to rotate. The electronically controlled generator sets appropriate power generation parameters based on the power generation control signal. The electronically controlled generator converts part of the kinetic energy of the downhill slope into electrical energy and transmits the electrical energy to the vehicle's battery, realizing the recovery of downhill energy and improving the energy utilization efficiency of the vehicle.

[0108] S205, sending a prompt message to the driver that the vehicle has entered a long downhill section, so as to prompt the driver to pay attention to the vehicle status;

[0109] In the car's intelligent driving assistance system, when the vehicle enters a long downhill section, the vehicle's electronic control unit will trigger an operation to send a prompt message to the driver.

[0110] Specifically, the vehicle's electronic control unit will send a signal to the dashboard, and a prominent warning icon will pop up on the dashboard's central display screen, such as a downward arrow with the text "Long Downhill Section" next to it. This icon will be displayed in a striking color to attract the driver's attention.

[0111] At the same time, detailed text prompts will be displayed on the driving computer display screen on the dashboard, such as "The vehicle has entered a long downhill section, please drive carefully and pay attention to the vehicle status."

[0112] S206, continuously detecting the engine speed;

[0113] In this embodiment, step S206 is similar to step S104 in the above embodiment and will not be described again here.

[0114] S207, when the engine speed reaches a second preset threshold value and the throttle opening is still 0, the controller automatically outputs an auxiliary brake control signal to activate the auxiliary brake device;

[0115] In this embodiment, step S207 is similar to step S105 in the above embodiment and will not be described again here.

[0116] S208, obtaining engine speed data of the engine within a preset time period;

[0117] There is a high-precision clock module inside the vehicle's electronic control unit for timing. When the operation of obtaining engine speed data is started, the clock module starts timing.

[0118] The vehicle's electronic control unit maintains real-time communication with the speed sensor on the engine. During a preset time period, the vehicle's electronic control unit collects pulse signals from the speed sensor at fixed time intervals. For each pulse signal collected, the vehicle's electronic control unit processes it according to a pre-set algorithm. Through such collection and calculation at fixed time intervals, within the preset time period, the vehicle's electronic control unit obtains a series of engine speed data, which can be used for subsequent analysis of engine performance.

[0119] S209, when the engine speed data shows that the engine speed continues to increase, the controller outputs a buzzer alarm signal to prompt the driver to use the foot brake for combined braking;

[0120] The vehicle's electronic control unit is responsible for monitoring the engine speed data and making decisions and alarms.

[0121] When executing step S209, the electronic control unit of the vehicle has obtained the engine speed data within the preset time period. Assume that the electronic control unit of the vehicle sets an algorithm for judging whether the engine speed continues to increase, that is, if the engine speed is higher than the speed of the previous time interval by a certain value each time within 5 consecutive time intervals, it is judged that the engine speed continues to increase.

[0122] Once the conclusion that the engine speed continues to increase is drawn through the analysis of the engine speed data, the vehicle's electronic control unit will output a buzzer alarm signal as a controller. This buzzer alarm signal will be sent to the vehicle's audio alarm system. After receiving the buzzer alarm signal, the vehicle's audio alarm system will issue a continuous alarm sound, and the sound is loud enough to attract the driver's attention. At the same time, at the moment the buzzer alarm signal is issued, a red warning light will light up on the dashboard, and the words "Brake Tip" will be displayed on the light to remind the driver to use the foot brake for combined braking.

[0123] S210, when the engine speed reaches a third preset threshold and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state;

[0124] When the vehicle is in a dangerous state, the electric fan is driven by the motor, and its control logic changes. Specifically, during the driving process of the vehicle, the increased air resistance will have a certain braking effect on the vehicle, and the electric fan participates in energy consumption auxiliary braking. Specifically, when the fan increases the power according to the danger signal, due to the strong stirring of the air by the fan, it will produce a small reverse force equivalent to adding a small reverse force to the vehicle, which slightly reduces the speed of the vehicle, just like adding a weak headwind effect in front of the vehicle. The electric water pump, the electric oil pump and the electric air conditioner change their own working state to participate in energy consumption auxiliary braking. The electric water pump, the electric oil pump and the electric air conditioner consume a certain amount of engine power by increasing the power. Specifically, more power needs to be obtained from the engine to maintain a higher working effect, which requires the engine to output more energy to drive the electric water pump, the electric oil pump and the electric air conditioner, thereby consuming part of the engine power and producing a braking effect on the vehicle.

[0125] S211, controlling the electronically controlled fan, the electronically controlled water pump, the electronically controlled oil pump and the electronically controlled air conditioner to participate in energy consumption through a controller to provide auxiliary braking;

[0126] The vehicle's engine is equipped with an electronically controlled fan, electronically controlled water pump, electronically controlled oil pump and electronically controlled air conditioning.

[0127] For the electronically controlled fan, the vehicle's electronic control unit detects the high temperature signal from the engine temperature sensor, determines that the vehicle is in a dangerous state, and sends a danger signal to the electronically controlled fan. After receiving the signal, the electronically controlled fan will increase the speed to enhance the heat dissipation capacity of the engine, reduce the engine temperature, and prevent further damage to the engine.

[0128] For the electronically controlled water pump, when the vehicle's cooling system fails and the coolant circulates poorly, it may cause the engine to overheat and put the vehicle in a dangerous state. After receiving the abnormal signal from the pressure sensor, the electronically controlled water pump will change its working state to ensure that the coolant circulates quickly in the engine, taking away more heat and thus protecting the engine.

[0129] For the electronically controlled oil pump, if the engine oil pressure is too low, it may lead to insufficient lubrication of the engine components, causing serious wear and tear, and putting the vehicle in a dangerous state. After the vehicle's electronic control unit receives the signal of low oil pressure, it sends a danger signal to the electronically controlled oil pump. After receiving the signal, the electronically controlled oil pump will increase its own output pressure to ensure that the engine components have enough oil for lubrication.

[0130] For electronically controlled air conditioners, in some special cases, such as electrical failures in vehicles, the circuit may be overloaded, putting the vehicle in a dangerous state. After the vehicle's electronic control unit detects the abnormal current signal from the current sensor in the circuit, it sends a danger signal to the electronically controlled air conditioner. After receiving the signal, the electronically controlled air conditioner will stop working to reduce the overall power load of the vehicle, prevent further damage to the circuit system, and ensure the safety of the vehicle.

[0131] S212, reading the duration of the vehicle braking signal when the road is on a long downhill slope, and if the duration reaches the time limit, it is determined that the driver does not use the engine brake;

[0132] At the beginning of a long downhill section, the timer inside the vehicle's electronic control unit starts at the same time, and the timer starts to record the duration of the vehicle's brake signal. The vehicle's braking system is equipped with a brake signal sensor. Every time the driver steps on the brake pedal, the brake signal sensor will send a brake signal to the vehicle's electronic control unit, and the vehicle's electronic control unit will identify and record this signal. Specifically, during a long downhill driving process, if the driver frequently steps on the brakes, causing the duration of the vehicle's brake signal to continue to accumulate, when the brake signal duration reaches the time limit, the vehicle's electronic control unit will determine that the driver did not use engine braking.

[0133] S213: Output a signal to the driver through the controller, prompting the driver to use engine downshifting to assist braking.

[0134] When the vehicle's electronic control unit determines that the driver has not used engine braking, the vehicle's electronic control unit will generate a prompt signal. Specifically, the vehicle's electronic control unit will send the prompt signal to the vehicle's audio system. The audio system will issue a voice prompt to remind the driver to use engine braking. The volume of the voice prompt is moderate, which can be clearly heard by the driver, but not too harsh to affect driving.

[0135] In this embodiment, it is determined whether the driver uses engine downshifting for braking based on the engine speed information and the duration of brake use. If the driver does not use engine braking, a prompt is issued to prompt the driver to use engine auxiliary braking, thereby reducing the accident rate and avoiding engine damage due to excessive speed. When the vehicle's braking capacity is insufficient, energy consumption is participated in by the electronically controlled fan, electronically controlled water pump, electronically controlled oil pump and electronically controlled air conditioner to provide auxiliary braking, and energy consumption is participated in by multiple components to improve the vehicle's braking capacity.

[0136] See also Figure 3 The present application also provides a long downhill control device, comprising:

[0137] The first acquisition unit 301 is used to acquire engine speed information;

[0138] The second acquisition unit 302 is used to acquire throttle opening information when the engine speed information shows that the engine speed reaches a first preset threshold;

[0139] The recovery unit 303 is used to determine that the vehicle has entered a long downhill section and perform energy recovery processing on the vehicle when the throttle opening information shows that the throttle opening is 0;

[0140] A detection unit 304, used for continuously detecting the engine speed;

[0141] The activation unit 305 is used to automatically output the auxiliary brake control signal through the controller to activate the auxiliary brake device when the engine speed reaches a second preset threshold and the throttle opening is still 0, and the second preset threshold is greater than the first preset threshold;

[0142] A unit 306 is provided for determining that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening is still 0, and starting the vehicle energy consumption processing through the controller to provide auxiliary braking. The third preset threshold is greater than the second preset threshold.

[0143] Optionally, the recovery unit 303 is further used for:

[0144] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and the controller automatically outputs power generation and air pumping control signals to the engine, which is equipped with an electronically controlled air compressor and an electronically controlled generator;

[0145] The electronically controlled air compressor and the electronically controlled generator are controlled according to the power generation and inflation control signals to recover the energy generated by downhill slope.

[0146] Optionally, the engine is equipped with an electronically controlled fan, electronically controlled water pump, electronically controlled oil pump and electronically controlled air conditioning;

[0147] The providing unit 306 is further configured to:

[0148] When the engine speed reaches a third preset threshold and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state;

[0149] The controller controls the electric fan, electric water pump, electric oil pump and electric air conditioner to participate in energy consumption to provide auxiliary braking.

[0150] Optionally, also include:

[0151] The third acquisition unit 307 is used to acquire the engine speed data of the engine within a preset time period;

[0152] The alarm unit 308 is used to output a buzzer alarm signal through the controller when the engine speed data shows that the engine speed continues to increase, so as to prompt the driver to use the foot brake for combined braking.

[0153] Optionally, also include:

[0154] The first prompting unit 309 is used to send a prompting message to the driver that the vehicle has entered a long downhill section, so as to prompt the driver to pay attention to the vehicle status.

[0155] Optionally, also include:

[0156] The determination unit 310 is used to read the duration of the vehicle braking signal when the road is on a long downhill slope, and if the duration reaches a time limit, it is determined that the driver does not use engine braking;

[0157] The second prompting unit 311 is used to output a signal to the driver through the controller, prompting the driver to use engine downshifting to assist braking.

[0158] See also Figure 4 The present application also provides a long downhill control device, comprising:

[0159] Processor 401, memory 402, input and output unit 403, bus 404;

[0160] The processor 401 is connected to the memory 402, the input and output unit 403 and the bus 404;

[0161] The memory 402 stores a program, and the processor 401 calls the program to execute any of the above long downhill control methods.

[0162] The present application also relates to a computer-readable storage medium, on which a program is stored. When the program is run on a computer, the computer executes any of the long downhill control methods described above.

[0163] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0164] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0165] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0166] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0167] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. A long downhill control method, characterized in that: The method comprises: Get engine speed information; When the engine speed information shows that the engine speed reaches a first preset threshold, acquiring throttle opening information; When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and energy recovery processing is performed on the vehicle; Continuously monitor engine speed; When the engine speed reaches a second preset threshold and the throttle opening is still 0, the controller automatically outputs an auxiliary brake control signal to activate the auxiliary brake device, and the second preset threshold is greater than the first preset threshold; When the engine speed reaches the third preset threshold and the throttle opening is still 0, it is determined that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state. The vehicle energy consumption processing is started by the controller to provide auxiliary braking. The third preset threshold is greater than the second preset threshold.

2. The long downhill control method according to claim 1, characterized in that: When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and energy recovery processing is performed on the vehicle, including: When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and the controller automatically outputs power generation and air pumping control signals to the engine, wherein the engine is equipped with an electronically controlled air compressor and an electronically controlled generator; The electronically controlled air compressor and the electronically controlled generator are controlled according to the power generation and inflation control signals to recover the energy generated by downhill slope.

3. The long downhill control method according to claim 1, characterized in that: The engine is equipped with an electronically controlled fan, an electronically controlled water pump, an electronically controlled oil pump and an electronically controlled air conditioner; When the engine speed reaches the third preset threshold and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state, and the vehicle energy consumption process is started by the controller to provide auxiliary braking, including: When the engine speed reaches a third preset threshold and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state; The controller controls the electrically controlled fan, the electrically controlled water pump, the electrically controlled oil pump and the electrically controlled air conditioner to participate in energy consumption so as to provide auxiliary braking.

4. The long downhill control method according to claim 1, characterized in that: When the engine speed reaches the second preset threshold and the throttle opening is still 0, the controller automatically outputs an auxiliary braking control signal to activate the auxiliary braking device, and the long downhill control method further includes: Obtaining engine speed data of the engine within a preset time period; When the engine speed data shows that the engine speed continues to increase, the controller outputs a buzzer alarm signal to prompt the driver to use the foot brake for combined braking.

5. The long downhill control method according to claim 1, characterized in that: When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle has entered a long downhill section, and after energy recovery processing is performed on the vehicle, the long downhill control method further includes: A reminder message is sent to the driver that the vehicle has entered a long downhill section, prompting the driver to pay attention to the vehicle status.

6. The long downhill control method according to claim 1, characterized in that: When the engine speed reaches the third preset threshold value n3 and the throttle opening is still 0, it is determined that the vehicle braking capacity is insufficient and the vehicle is in a dangerous state, and the vehicle energy consumption process is started by the controller to provide auxiliary braking, the long downhill control method further includes: Reading the duration of the vehicle braking signal when the road is on a long downhill slope, if the duration reaches the time limit, it is determined that the driver does not use engine braking; The controller outputs a signal to the driver, prompting the driver to use engine downshifting to assist braking.

7. A long downhill control device, characterized in that: The device comprises: A first acquisition unit, used to acquire engine speed information; A second acquisition unit, configured to acquire throttle opening information when the engine speed information indicates that the engine speed reaches a first preset threshold; A recovery unit, used for determining that the vehicle has entered a long downhill section when the throttle opening information shows that the throttle opening is 0, and performing energy recovery processing on the vehicle; A detection unit for continuously detecting the engine speed; an activation unit, configured to automatically output an auxiliary braking control signal through a controller to activate an auxiliary braking device when the engine speed reaches a second preset threshold and the throttle opening is still 0, wherein the second preset threshold is greater than the first preset threshold; A unit is provided, which is used to determine that the vehicle's braking capacity is insufficient and the vehicle is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening is still 0, and to start vehicle energy consumption processing through a controller to provide auxiliary braking, and the third preset threshold is greater than the second preset threshold.

8. A long downhill control device, characterized in that: The device comprises: Processor, memory, input-output unit, and bus; The processor is connected to the memory, the input and output unit, and the bus; The memory stores a program, and the processor calls the program to execute the long downhill slope control method according to any one of claims 1 to 6. 9 . A computer-readable storage medium having a program stored thereon, wherein when the program is executed on a computer, the long downhill slope control method according to claim 1 is executed.

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