Long downhill control method, device and storage medium

Abstract

The application discloses a long downhill control method and device and a storage medium, which are used for activating an auxiliary braking device when a vehicle is in a long downhill section without deceleration. The method comprises the following steps: acquiring engine speed information; when the engine speed information shows that the engine speed reaches a first preset threshold, acquiring throttle opening degree information; when the throttle opening degree information shows that the throttle opening degree is 0, determining that the vehicle enters a long downhill section, and performing energy recovery processing on the vehicle; continuously detecting the engine speed; when the engine speed reaches a second preset threshold and the throttle opening degree is still 0, automatically outputting an auxiliary braking control signal through a controller to activate the auxiliary braking device; and when the engine speed reaches a third preset threshold and the throttle opening degree is still 0, 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 the controller to provide auxiliary braking.

Description

TECHNICAL FIELD

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

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

[0003] When a vehicle encounters a long downhill during driving, the driver usually needs to step on the brake or manually control the engine braking to reduce or maintain the vehicle speed through the friction loss of high-speed engine movement to ensure driving safety. Once the engine speed of the vehicle during driving is too fast, not only the machine itself will be damaged, but also the operator or surrounding people may be threatened.

[0004] Generally, the engine is equipped with an auxiliary braking device, but the driver needs to actively press the brake switch to activate the auxiliary braking device according to the road conditions and driving needs to achieve efficient braking of the vehicle, which has a large dependence on the driver. When the slope is large, if the auxiliary braking device is not activated and the brake is not stepped on, the engine may be damaged due to the speed exceeding the limit speed. SUMMARY

[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 solutions provided in the present application are described below:

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

[0008] obtaining engine speed information;

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

[0010] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle enters a long downhill section, and the energy recovery process is taken for the vehicle;

[0011] continuously detecting the engine speed;

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

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

[0014] Optionally, when the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle enters a long downhill section, and the vehicle energy recovery process is taken, including:

[0015] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle enters a long downhill section, and the engine automatically outputs a power generation and inflation control signal to the engine through the controller, and the engine is provided with an electric control air compressor and an electric control generator;

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

[0017] Optionally, the engine is provided with an electric control fan, an electric control water pump, an electric control oil pump, and an electric control air conditioner;

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

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

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

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

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

[0023] When the engine speed data shows that the engine speed continues to rise, a buzzer alarm signal is outputted through the controller to prompt the driver to take the foot brake for joint braking.

[0024] Optionally, after the vehicle energy recovery process is taken when the throttle opening information shows that the throttle opening is 0, the long downhill control method further includes:

[0025] Send a prompt information to the driver that the vehicle enters a long downhill section to prompt the driver to pay attention to the vehicle state.

[0026] Optionally, when the engine speed reaches a third preset threshold n3, and the throttle opening is still 0, it is determined that the vehicle braking ability is insufficient, and the vehicle is in a dangerous state, and the long downhill control method further comprises:

[0027] Reading the duration of the vehicle brake signal when the road is a long downhill, if the duration reaches a time limit, it is determined that the driver does not use engine braking;

[0028] Outputting a signal to the driver through the controller to prompt the driver to use engine downshift auxiliary braking.

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

[0030] A first acquisition unit for acquiring engine speed information;

[0031] A second acquisition unit for acquiring throttle opening information when the engine speed information shows that the engine speed reaches a first preset threshold;

[0032] A recovery unit for determining that the vehicle enters a long downhill section when the throttle opening information shows that the throttle opening is 0, and taking 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 braking control signal through the controller to activate the auxiliary braking device when the engine speed reaches a second preset threshold, and the throttle opening is still 0, the second preset threshold being greater than the first preset threshold;

[0035] A providing unit for determining that the vehicle braking ability 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 vehicle energy consumption processing through the controller to provide auxiliary braking, the third preset threshold being greater than the second preset threshold.

[0036] Optionally, the recovery unit comprises:

[0037] When the throttle opening information shows that the throttle opening is 0, it is determined that the vehicle enters a long downhill section, and a power generation and inflation control signal is automatically output to the engine through the controller, the engine being provided with an electric control air compressor and an electric control generator;

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

[0039] Optionally, the engine is provided with an electric control fan, an electric control water pump, an electric control oil pump, and an electric control air conditioner;

[0040] The providing unit comprises:

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

[0042] 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 to provide auxiliary braking.

[0043] Optionally, the long downhill control device further comprises:

[0044] The third acquisition unit is configured to acquire engine speed data of the engine within a preset time period;

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

[0046] Optionally, the long downhill control device further comprises:

[0047] The first prompt unit is configured to output prompt information that the vehicle enters a long downhill road section to the driver, so as to prompt the driver to pay attention to the vehicle state.

[0048] Optionally, the long downhill control device further comprises:

[0049] The determination unit is configured to read the duration of the whole vehicle brake signal when the road is in a long downhill, and if the duration reaches a time limit, it is determined that the driver does not use engine braking;

[0050] The second prompt unit is configured to output a signal to the driver through the controller, prompting the driver to use engine downshift auxiliary braking.

[0051] The third aspect of the present application provides a long downhill control device, which comprises:

[0052] A processor, a memory, an input / output unit and a bus;

[0053] The processor is connected with the memory, the input / 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] The fourth aspect of the present application provides a computer readable storage medium, which stores a program, and the program executes the first aspect and any optional long downhill control method in the first aspect when executed on a computer.

[0056] From the above technical solution can be seen, the present application has the following advantages:

[0057] When the engine speed reaches the second preset threshold and the throttle opening is 0, the auxiliary brake device is automatically activated by the controller, without the need for the driver to manually press the brake switch, and the engine speed is automatically detected, improving the intelligence and reducing the probability of error operation. The engine speed is continuously detected, and different measures can be automatically taken according to different engine speeds to cope with different road conditions, thereby improving the service life of the engine and avoiding damage to the engine due to the speed exceeding the limit speed. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0059] Figure 1 An embodiment flowchart of the long downhill control method in the present application;

[0060] Figure 2 Another embodiment flowchart of the long downhill control method in the present application;

[0061] Figure 3 An embodiment structure diagram of the long downhill control device in the present application;

[0062] Figure 4 Another embodiment structure diagram of the long downhill control device in the present application. DETAILED DESCRIPTION

[0063] In the following description, specific details are set forth in order to provide a thorough understanding of embodiments of the application. However, persons of ordinary skill in the art will readily recognize that embodiments of the application can be practiced without some or all of the specific details set forth herein. In other instances, well-known structures, devices, circuits, and processes have not been described in detail in order to avoid obscuring the application.

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

[0065] It should also be understood that the term “and / or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term “at least one of’ denotes one, or a plurality of, of the enumerated terms that it precedes, and that the term “per” means are an average over a relevant measurement period.

[0066] As used in the description of the application and the appended claims, the term “if’ can be interpreted to mean “when” or “once,” or “in response to determining,” or “in response to detecting” depending on the context. Similarly, the phrase “if it is determined” or “if [a described condition or event] is detected” can be interpreted to mean “once it is determined” or “in response to determining,” or “once [the described condition or event] is detected,” or “in response to detecting [the described condition or event],” depending on the context.

[0067] In addition, the terms “first,” “second,” “third,” etc. as used in the description of embodiments herein and throughout the claims (if any) are not used to connote any inherent importance or to denote relative importance among the referenced claims, elements, features, or sequences.

[0068] Reference throughout this specification to “one embodiment” or “an embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in additional embodiments,” and so on, in various places throughout this specification are not necessarily all referring to the same embodiment, unless otherwise specified. The terms “comprising,” “including,” “having,” and their variations, as used throughout this application and claims, are intended to encompass the presence of one or more of the stated features, elements, or components, but do not preclude the presence or addition of one or more other features, elements, or components.

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

[0070] When a vehicle encounters a long downhill during driving, the driver usually needs to step on the brake or artificially control the engine braking to reduce or maintain the vehicle speed through the friction loss of high-speed engine movement to ensure driving safety. Once the engine speed of the vehicle during driving is too fast, it not only causes damage to the machine itself, but also threatens the operator or surrounding people.

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

[0072] Based on this, the application discloses a long downhill control method and device and a storage medium, which are used to reduce the occurrence of errors and prolong the service life of the engine.

[0073] The technical solutions in the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0074] The method of the application can be applied to a server, a device, a terminal or other devices with logical processing capability, and the application is not limited in this regard.

[0075] Please refer to Figure 1 The application first provides an embodiment of a long downhill control method, which comprises the following steps:

[0076] S101, acquiring engine rotation speed information;

[0077] The engine rotation 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 rotation speed information can be acquired by a rotation speed sensor installed near the engine crankshaft. The rotation 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 directly proportional to the rotation speed of the engine crankshaft. After the pulse signals are collected, amplified, filtered and processed by the signal processing circuit in the electronic control unit of the automobile, the engine rotation speed information is acquired according to a pre-set algorithm.

[0078] S102, acquiring throttle opening degree information when the engine rotation speed information shows that the engine rotation speed reaches a first pre-set threshold value;

[0079] The electronic control unit of the vehicle continuously receives the engine rotation speed information from the rotation speed sensor. It is assumed that the first pre-set threshold value is set to 3000 revolutions per minute. When the electronic control unit of the vehicle detects that the engine rotation speed reaches 3000 revolutions per minute, the electronic control unit of the vehicle sends an instruction to the throttle position sensor to acquire the throttle opening degree information.

[0080] The throttle position sensor is usually a potentiometer sensor installed on the throttle body. The opening size of the throttle directly reflects the opening condition of the accelerator. When the driver steps on the accelerator pedal, the throttle will open by a certain angle, and the resistance value of the throttle position sensor will change accordingly. When the throttle is fully open, the sensor outputs a high voltage signal, indicating that the accelerator opening is 100%. It should be noted that the electronic control unit of the vehicle acquires the current accelerator 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 enters a long downhill section, and energy recovery processing is performed on the vehicle;

[0082] The electronic control unit of the vehicle continuously monitors the throttle opening information. When the electronic control unit of the vehicle receives the throttle opening information showing 0, the electronic control unit of the vehicle further combines other sensor information to determine whether the vehicle enters a long downhill section. Specifically, a slope sensor is installed on the vehicle, which can measure the slope angle of the road surface on which the vehicle travels. If the slope sensor detects a certain negative angle of the road surface while the throttle opening is 0, the electronic control unit of the vehicle determines that the vehicle enters a long downhill section. At this time, the electronic control unit of the vehicle starts the energy recovery process.

[0083] Further, during the energy recovery process, the motor control system switches the motor of the vehicle to the generator mode. When the vehicle slides on the downhill section due to gravity, the wheels drive the motor to rotate, and the motor starts to generate electricity as a generator. During this process, the control algorithm of the motor can be adjusted to optimize the efficiency of energy recovery. According to the speed of the vehicle, the current power of the battery and other factors, the output power of the generator is reasonably adjusted to maximize the recovery of energy under the premise of safety.

[0084] S104, continuously detecting the engine speed;

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

[0086] The electronic control unit of the vehicle has a special 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 electronic control unit of the vehicle can continuously detect the engine speed, and can adjust the fuel injection amount, ignition advance angle and other parameters of the engine in time according to the change of the 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, automatically outputting an auxiliary brake control signal by the controller to activate the auxiliary brake device, 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 throttle opening information. Suppose 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 electronic control unit of the vehicle continuously detects the engine speed, and when it detects that the engine speed reaches 4000 rpm, the electronic control unit of the vehicle as the controller will automatically output an auxiliary brake control signal.

[0090] In different brake systems of different vehicle models, the auxiliary brake device can be an engine exhaust brake device or a retarder. When the electronic control unit of the vehicle 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 dangerous situations from occurring during the vehicle's downhill process due to the engine speed being too high.

[0091] S106, when the engine speed reaches a third preset threshold, and the throttle opening is still 0, determine that the vehicle's braking ability is insufficient, and the vehicle is in a dangerous state, start the vehicle energy consumption process through the controller to provide auxiliary braking, the third preset threshold is greater than the second preset threshold.

[0092] In the control system of an electric vehicle or a hybrid vehicle, suppose 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 electronic control unit of the vehicle detects that the engine or motor speed reaches 5000 rpm, and the throttle opening is still 0, the electronic control unit of the vehicle determines that the vehicle's braking ability is insufficient, and the vehicle is in a dangerous state. At this time, the electronic control unit of the vehicle starts the vehicle energy consumption process to provide auxiliary braking to avoid dangerous situations caused by insufficient braking ability.

[0094] In the embodiment, when the engine speed reaches the second preset threshold and the throttle opening is 0, the auxiliary brake device is automatically activated by the controller, and the driver does not need to manually press the brake switch, the engine speed is automatically detected, the intelligence is improved, the probability of error operation is reduced, the engine speed is continuously detected, different measures can be automatically taken according to different engine speeds to cope with different road conditions, and the service life of the engine is improved. Avoid damage to the engine due to excessive speed.

[0095] Please refer to Figure 2 The application provides another embodiment of the long downhill control method, which comprises the following steps:

[0096] S201, obtaining engine speed information;

[0097] In the embodiment, step S201 is similar to step S101 of the foregoing embodiment, and will not be described here.

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

[0099] In the embodiment, step S202 is similar to step S102 of the foregoing embodiment, and will not be described here.

[0100] S203, when the throttle opening information shows that the throttle opening is 0, determining that the vehicle enters a long downhill section, and automatically outputting a power generation and inflation control signal to the engine by the controller, wherein the engine is provided with an electric control air compressor and an electric generator;

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

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

[0103] For the electric control air compressor configured for the engine, the electronic control unit of the vehicle generates an inflation control signal according to the pre-set program and the information fed back by the sensor, and the inflation control signal contains the setting of the working parameters of the air compressor, such as the speed of the air compressor and the air intake amount, etc. Then the electronic control unit of the vehicle sends the inflation control signal to the electric control air compressor on the engine, and the electric control air compressor starts or adjusts the working state according to the signal after receiving the signal.

[0104] For the electrically controlled generator, when the electronic control unit of the vehicle detects that the vehicle battery is low, the electronic control unit of the vehicle generates a power generation control signal according to the current state of the battery and the power demand of the vehicle. The power generation control signal contains the setting of parameters such as generator output power and generator voltage. The electronic control unit of the vehicle sends the power generation control signal to the electrically controlled generator on the engine. After receiving the signal, the electrically controlled generator adjusts its magnetic field strength, rotor speed and other parameters, generates electricity according to the requirements, and delivers the generated electricity to the vehicle battery to charge the battery and meet the power demand of the vehicle electrical system.

[0105] S204, control the electrically controlled air compressor and the electrically controlled generator to recover the energy generated by the downhill according to the power generation and inflation control signal;

[0106] For the electrically controlled air compressor, the inflation control signal sent by the electronic control unit of the vehicle is optimized and adjusted according to the state of the vehicle downhill. The inflation control signal sent by the electronic control unit of the vehicle makes the electrically controlled air compressor work with part of the energy of the downhill. Specifically, the transmission system of the vehicle is connected with the electrically controlled air compressor through a specific mechanical connection. When the vehicle is downhill, the wheels of the vehicle drive the transmission system to rotate, and the transmission system transmits power to the electrically controlled air compressor. The electrically controlled air compressor operates at a suitable speed according to the inflation control signal, compresses the external air and stores it in the air tank. In this process, the energy of the downhill originally wasted by the brake is partially converted into the energy of the compressed air and stored, realizing the recovery of energy.

[0107] For the electrically controlled generator, the power generation control signal sent by the electronic control unit of the vehicle is also adjusted based on the energy of the downhill. The power generation control signal sent by the electronic control unit of the vehicle requires the electrically controlled generator to generate electricity with the energy of the downhill. The wheels of the vehicle are connected with the electrically controlled generator through the transmission system, and the rotation of the wheels drives the rotor of the electrically controlled generator to rotate when the vehicle is downhill. The electrically controlled generator sets appropriate power generation parameters according to the power generation control signal. The electrically controlled generator converts part of the kinetic energy of the downhill into electrical energy and delivers the electrical energy to the battery of the vehicle, realizing the recovery of the energy of the downhill and improving the energy utilization efficiency of the vehicle.

[0108] S205, sending a prompt information to the driver that the vehicle enters a long downhill section, to prompt the driver to pay attention to the state of the vehicle;

[0109] In the intelligent driving assistance system of the automobile, when the vehicle enters a long downhill section, the electronic control unit of the vehicle triggers the operation of sending a prompt information to the driver.

[0110] Specifically, the electronic control unit of the vehicle sends a signal to the instrument panel, and a clear warning icon, such as a downward arrow with the text label "long downhill road section", pops up on the central display screen of the instrument panel. The icon is displayed in a prominent color to attract the driver's attention.

[0111] At the same time, on the driving computer display screen of the instrument panel, a detailed text prompt is displayed, such as "the vehicle has entered a long downhill road section, please drive carefully and pay attention to the vehicle state".

[0112] S206, continuously detecting the engine speed;

[0113] In this embodiment, step S206 is similar to step S104 of the foregoing embodiment, which will not be described here.

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

[0115] In this embodiment, step S207 is similar to step S105 of the foregoing embodiment, which will not be described here.

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

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

[0118] The electronic control unit of the vehicle and the speed sensor on the engine maintain real-time communication, and within the preset time period, the electronic control unit of the vehicle collects the pulse signals from the speed sensor at fixed time intervals. For each collected pulse signal, the electronic control unit of the vehicle processes it according to a pre-set algorithm. Through such fixed time interval collection and calculation, within the preset time period, the electronic control unit of the vehicle 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 rise, outputting a buzzer alarm signal through the controller to prompt the driver to take foot brake joint braking;

[0120] The electronic control unit of the vehicle undertakes the tasks of monitoring the engine speed data and making decisions for alarm.

[0121] When the step S209 is executed, the electronic control unit of the vehicle has obtained the engine speed data in a preset time period. It is assumed that the electronic control unit of the vehicle sets an algorithm for judging whether the engine speed is continuously increasing, i.e. if the engine speed is higher than the engine speed in the previous time interval by a certain value in 5 continuous time intervals, it is determined that the engine speed is continuously increasing.

[0122] Once it is concluded through the analysis of the engine speed data that the engine speed is continuously increasing, the electronic control unit of the vehicle outputs a buzzer alarm signal as a controller. The buzzer alarm signal is sent to the audio alarm system of the vehicle. After receiving the buzzer alarm signal, the audio alarm system of the vehicle emits a continuous alarm sound, and the sound is loud enough to attract the attention of the driver. At the same time, a red warning light on the dashboard is turned on at the moment when the buzzer alarm signal is emitted, and the light displays the words "brake prompt" to prompt the driver to take the foot brake for joint braking.

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

[0124] When the vehicle is in a dangerous state, the electric control fan is driven by the motor, and the control logic is changed. Specifically, during the driving of the vehicle, the increased air resistance will produce a certain braking effect on the vehicle, and the electric control fan participates in energy consumption auxiliary braking. Specifically, when the fan operates with increased power according to the danger signal, due to the strong agitation of the fan to the air, a small reverse force is generated to the vehicle, which slightly reduces the speed of the vehicle, like a weak headwind effect is added in front of the vehicle. The electric control water pump, the electric control oil pump and the electric control air conditioner change their working state to participate in energy consumption auxiliary braking. The electric control water pump, the electric control oil pump and the electric control 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 makes the engine need to output more energy to drive the electric control water pump, the electric control oil pump and the electric control air conditioner, thereby consuming part of the power of the engine and producing a braking effect on the vehicle.

[0125] S211, the electric control fan, the electric control water pump, the electric control oil pump and the electric control air conditioner are controlled by the controller to participate in energy consumption to provide auxiliary braking;

[0126] The engine of the vehicle is provided with an electric control fan, an electric control water pump, an electric control oil pump and an electric control air conditioner.

[0127] For the electric control fan, the electronic control unit of the vehicle 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 electric control fan. After receiving the signal, the electric control 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 electric control water pump, when the cooling system of the vehicle fails to circulate the coolant, it may cause the engine to overheat, making the vehicle in a dangerous state. After receiving the abnormal signal from the pressure sensor, the electric control water pump will change its working state to ensure that the coolant circulates quickly in the engine and carries away more heat, thereby protecting the engine.

[0129] For the electric control oil pump, if the engine oil pressure is too low, it may cause insufficient lubrication of the engine parts, causing serious wear and making the vehicle in a dangerous state. After receiving the signal of low oil pressure from the electronic control unit of the vehicle, the electric control oil pump sends a danger signal to the electric control oil pump. After receiving the signal, the electric control oil pump will increase its output pressure to ensure that the engine parts have enough oil for lubrication.

[0130] For the electric control air conditioner, in some special situations, such as electrical failure of the vehicle, it may cause circuit overload, making the vehicle in a dangerous state. After detecting the abnormal current signal from the current sensor in the circuit, the electronic control unit of the vehicle sends a danger signal to the electric control air conditioner. After receiving the signal, the electric control air conditioner will stop working to reduce the overall power consumption of the vehicle, prevent further damage to the circuit system, and ensure the safety of the vehicle.

[0131] S212, read the duration of the vehicle brake signal when the road is in a long downhill, if the duration reaches the time limit, determine that the driver does not use engine braking;

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

[0133] S213, output a signal to the driver through the controller to prompt the driver to use engine downshift auxiliary braking.

[0134] When the electronic control unit of the vehicle determines that the driver does not use engine braking, the electronic control unit of the vehicle generates a prompt signal. Specifically, the electronic control unit of the vehicle sends the prompt signal to the audio system of the vehicle. The audio system issues a voice prompt to prompt the driver to use engine braking. The volume of the voice prompt is moderate, which can be clearly heard by the driver and will not be too harsh to affect driving.

[0135] In the embodiment, whether the driver uses engine downshift braking is determined according to the engine speed information and the duration of using the brake, and if the driver does not use engine braking, a prompt is issued to prompt the driver to use engine auxiliary braking, so that the accident rate is reduced and the engine is prevented from being damaged due to too high speed; when the braking capacity of the vehicle is insufficient, the electric control fan, the electric control water pump, the electric control oil pump and the electric control air conditioner are used to consume energy to provide auxiliary braking, and the braking capacity of the vehicle is improved by using multiple components to consume energy.

[0136] Please refer to Figure 3 The application also provides a long downhill control device, which comprises:

[0137] The first acquisition unit 301 is configured to acquire engine speed information.

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

[0139] The recycling unit 303 is configured to determine that the vehicle enters a long downhill section when the throttle opening degree information shows that the throttle opening degree is 0, and perform energy recycling processing on the vehicle.

[0140] The detection unit 304 is configured to continuously detect the engine speed.

[0141] The activation unit 305 is 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 degree is still 0, the second preset threshold being greater than the first preset threshold.

[0142] The providing unit 306 is configured to determine that the braking capacity of the vehicle is insufficient and the vehicle is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening degree is still 0, and start a vehicle energy consumption process through a controller to provide auxiliary braking, the third preset threshold being greater than the second preset threshold.

[0143] Optionally, the recycling unit 303 is further configured to:

[0144] When the throttle opening degree information shows that the throttle opening degree is 0, it is determined that the vehicle enters a long downhill section, and an engine automatic output power generation and inflation control signal is output to the engine through the controller, and the engine is provided with an electric control air compressor and an electric control generator;

[0145] The electric control air compressor and the electric control generator are controlled according to the power generation and inflation control signal to recycle the energy generated by the downhill.

[0146] Optionally, the engine is provided with an electric control fan, an electric control water pump, an electric control oil pump and an electric control air conditioner;

[0147] The providing unit 306 is further used for:

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

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

[0150] Optionally, the method further comprises:

[0151] The third acquisition unit 307 is used for acquiring engine speed data of the engine in a preset time period;

[0152] The alarm unit 308 is used for outputting a buzzer alarm signal through the controller when the engine speed data shows that the engine speed continues to rise, to prompt the driver to take the foot brake for joint braking.

[0153] Optionally, the method further comprises:

[0154] The first prompt unit 309 is used for outputting prompt information that the vehicle enters a long downhill section to the driver, to prompt the driver to pay attention to the vehicle state.

[0155] Optionally, the method further comprises:

[0156] The determination unit 310 is used for reading the duration of the whole vehicle brake signal when the road is in a long downhill, and if the duration reaches a time limit value, it is determined that the driver does not use engine braking;

[0157] The second prompt unit 311 is used for outputting a signal to the driver through the controller, to prompt the driver to use engine downshift auxiliary braking.

[0158] Please refer to Figure 4 The application also provides a long downhill control device, comprising:

[0159] The processor 401, the memory 402, the input output unit 403 and the bus 404;

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

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

[0162] The application also relates to a computer readable storage medium, which stores a program, and when the program runs on a computer, the computer executes any one of the above long downhill control methods.

[0163] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing 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 system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0165] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0166] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0167] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, read-only memory), a random access memory (RAM, random access memory), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. A long down control method, characterized by, The method comprises: acquiring engine speed information; when the engine speed information shows that the engine speed reaches a first preset threshold, acquiring throttle opening degree information; when the throttle opening degree information shows that the throttle opening degree is 0, determining that the vehicle enters a long downhill section, and taking energy recovery treatment on the vehicle; continuously detecting the engine speed; when the engine speed reaches a second preset threshold and the throttle opening degree is still 0, automatically outputting an auxiliary brake control signal by a controller to activate an auxiliary brake device, the second preset threshold being greater than the first preset threshold; when the engine speed reaches a third preset threshold and the throttle opening degree is still 0, determining that the vehicle braking ability is insufficient and the vehicle is in a dangerous state, and starting vehicle energy consumption treatment by the controller to provide auxiliary braking, the third preset threshold being greater than the second preset threshold; the engine is provided with an electrically controlled fan, an electrically controlled water pump, an electrically controlled oil pump and an electrically controlled air conditioner; when the engine speed reaches the third preset threshold and the throttle opening degree is still 0, determining that the vehicle braking ability is insufficient and the vehicle is in a dangerous state, and starting vehicle energy consumption treatment by the controller to provide auxiliary braking, comprising: when the engine speed reaches the third preset threshold and the throttle opening degree is still 0, determining that the vehicle braking ability is insufficient and the vehicle is in a dangerous state; and controlling 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 by the controller to provide auxiliary braking; reading the duration of the whole vehicle brake signal when the road is in a long downhill, and if the duration reaches a time limit, determining that the driver does not use engine braking; outputting a signal to the driver by the controller to prompt the driver to use engine downshift auxiliary braking.

2. The long down control method according to claim 1, characterized by, when the throttle opening degree information shows that the throttle opening degree is 0, determining that the vehicle enters a long downhill section, and taking energy recovery treatment on the vehicle, comprising: when the throttle opening degree information shows that the throttle opening degree is 0, determining that the vehicle enters a long downhill section, and automatically outputting a power generation and inflation control signal to the engine by the controller, the engine being provided with an electrically controlled air compressor and an electrically controlled generator; controlling the electrically controlled air compressor and the electrically controlled generator to recover the energy generated on the downhill according to the power generation and inflation control signal.

3. The long down control method of claim 1, wherein after the long downhill control method further comprises: acquiring engine speed data of the engine in a preset time period; when the engine speed data shows that the engine speed continuously rises, outputting a buzzer alarm signal by the controller to prompt the driver to take foot brake joint braking.

4. The long down control method of claim 1, wherein after the long downhill control method further comprises: sending prompt information to the driver that the vehicle enters a long downhill section to prompt the driver to pay attention to the vehicle state.

5. A long down control device characterized by comprising: The device comprises: The first acquisition unit is configured to acquire engine speed information. The second acquisition unit is configured to acquire throttle opening information when the engine speed information indicates that the engine speed reaches a first preset threshold. The recovery unit is configured to determine that the vehicle enters a long downhill section when the throttle opening information indicates that the throttle opening is 0, and perform energy recovery processing on the vehicle. The detection unit is configured to continuously detect the engine speed. The activation unit is configured to automatically output an auxiliary brake control signal through a controller to activate an auxiliary brake device when the engine speed reaches a second preset threshold and the throttle opening is still 0, the second preset threshold being greater than the first preset threshold. The providing unit is configured to determine that the vehicle has insufficient braking capability and is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening is still 0, and start vehicle energy consumption processing through the controller to provide auxiliary braking, the third preset threshold being greater than the second preset threshold, the engine being provided with an electrically controlled fan, an electrically controlled water pump, an electrically controlled oil pump, and an electrically controlled air conditioner. The providing unit includes: determining that the vehicle has insufficient braking capability and is in a dangerous state when the engine speed reaches a third preset threshold and the throttle opening is still 0; and controlling 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 to provide auxiliary braking through the controller. The determination unit is configured to read the duration of the whole vehicle brake signal when the road is in a long downhill, and determine that the driver does not use engine braking if the duration reaches a time limit. The second prompting unit is configured to output a signal to the driver through the controller to prompt the driver to use engine downshift auxiliary braking.

6. A long down control device characterized by comprising: The device includes: a processor, a memory, an input / output unit, and a bus; the processor is connected to the memory, the input / output unit, and the bus; the memory stores a program, and the processor invokes the program to execute the long downhill control method according to any one of claims 1 to 4.

7. A computer readable storage medium, the computer readable storage medium storing a program, the program performing the long downhill control method according to any one of claims 1 to 4 when executed on a computer.

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