Control method and device for extended-range vehicle and extended-range vehicle

Abstract

The invention discloses a control method and device of an extended-range vehicle and the extended-range vehicle, and belongs to the technical field of vehicles. The control method of the range extending type vehicle comprises the steps that the gradient of a downhill in a driving road of the range extending type vehicle is obtained; under the condition that the gradient is larger than a first gradient threshold value, the extended-range vehicle is controlled to conduct regenerative braking to charge a battery of the extended-range vehicle, and an engine of the extended-range vehicle is controlled to enter a braking mode; based on the comparison result of the gradient and a second gradient threshold value, the target braking level of the braking mode is determined, and the second gradient threshold value is larger than the first gradient threshold value; and controlling the engine to operate in the braking mode of the target braking level, and controlling a generator connected with the engine to output power so as to perform braking control on the extended-range vehicle. The braking capacity of the extended-range vehicle can be improved, additional components are not needed, economic losses are reduced under the condition that the driving safety of the extended-range vehicle is guaranteed, the arrangement space of the vehicle is not occupied, and additional losses are avoided.

Description

Technical Field

[0001] This application belongs to the technical field of vehicles, and particularly relates to a control method, device, and extended-range vehicle for an extended-range vehicle. Background Art

[0002] In special operating scenarios such as mining areas, extended-range vehicles have a long driving range under heavy load conditions and generate a large downhill torque on downhill roads. It is difficult for the vehicle to maintain a long-distance forced braking ability through mechanical braking. Therefore, electric braking is generally the main method in downhill conditions. However, the batteries of extended-range vehicles are in different states, and the recoverable power varies. The regenerative braking ability of extended-range vehicles is affected by the battery state.

[0003] Currently, additional components are usually set up to consume electrical energy through the additional components when the battery recovery ability is insufficient to improve the electric braking ability of the vehicle. However, setting up additional components will increase costs to a certain extent, require occupying the vehicle's layout space, and will bring additional losses. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a control method, device, and extended-range vehicle for an extended-range vehicle, which can improve the braking ability of the extended-range vehicle, do not require additional components, reduce economic losses while ensuring the driving safety of the extended-range vehicle, do not occupy the vehicle's layout space, and will not bring additional losses.

[0005] In a first aspect, this application provides a control method for an extended-range vehicle, and the method includes:

[0006] Obtain the slope of the downhill section in the driving road of the extended-range vehicle;

[0007] When the slope is greater than a first slope threshold, control the extended-range vehicle to perform regenerative braking to charge its own battery, and control the engine of the extended-range vehicle to enter a braking mode;

[0008] Based on the comparison result between the slope and a second slope threshold, determine the target braking level of the braking mode, where the second slope threshold is greater than the first slope threshold;

[0009] Control the engine to operate in the braking mode at the target braking level, and control the generator connected to the engine to output power to perform braking control on the extended-range vehicle.

[0010] According to the control method of the range-extended vehicle of the present application, when the slope of the downhill section of the driving road is greater than the first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery, the engine is controlled to enter the braking mode, and based on the comparison result of the slope and the second slope threshold, the engine is controlled to operate in the braking mode of the target braking level, and the generator connected to the engine is controlled to perform power output, and the electric energy is consumed by the way of the generator dragging the engine in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, without the need to additionally add components, can reduce the economic loss while ensuring the driving safety of the range-extended vehicle, does not occupy the vehicle layout space, and does not bring additional losses.

[0011] According to an embodiment of the present application, the controlling the generator connected to the engine to perform power output includes:

[0012] Based on the slope, the operating parameters and the mass parameters of the range-extended vehicle, determining the braking demand power of the range-extended vehicle;

[0013] Based on the braking demand power and the rechargeable power of the battery, determining the target braking power of the engine;

[0014] Based on the comparison result of the target braking power and the braking power threshold, adjusting the output power of the generator.

[0015] According to an embodiment of the present application, the adjusting the output power of the generator based on the comparison result of the target braking power and the braking power threshold includes:

[0016] In the case where the target braking power is greater than the braking power threshold, increasing the output power of the generator;

[0017] Or, in the case where the target braking power is less than or equal to the braking power threshold, decreasing the output power of the generator.

[0018] According to an embodiment of the present application, the braking levels of the braking mode include a first braking level and a second braking level, and the braking force provided by the engine in the second braking level is greater than the braking force provided by the engine in the first braking level. The determining the target braking level of the braking mode based on the comparison result of the slope and the second slope threshold includes:

[0019] In the case where the slope is greater than the second slope threshold, determining the target braking level as the second braking level;

[0020] Alternatively, when the slope is less than or equal to the second slope threshold, determine that the target braking level is the first braking level.

[0021] According to an embodiment of the present application, after obtaining the slope of the downhill section of the driving road of the range-extended vehicle, the method further includes:

[0022] When the slope is greater than the third slope threshold and less than or equal to the first slope threshold, control the range-extended vehicle to perform regenerative braking to charge its own battery.

[0023] In a second aspect, the present application provides a control device for a range-extended vehicle, the device includes:

[0024] An acquisition module, configured to acquire the slope of the downhill section of the driving road of the range-extended vehicle;

[0025] A first processing module, configured to, when the slope is greater than the first slope threshold, control the range-extended vehicle to perform regenerative braking to charge its own battery, and control the engine of the range-extended vehicle to enter the braking mode;

[0026] A second processing module, configured to determine the target braking level of the braking mode based on the comparison result between the slope and the second slope threshold, where the second slope threshold is greater than the first slope threshold;

[0027] A third processing module, configured to control the engine to operate in the braking mode at the target braking level, and control the generator connected to the engine to perform power output to perform braking control on the range-extended vehicle.

[0028] According to the control device of the range-extended vehicle of the present application, when the slope of the downhill section of the driving road is greater than the first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery, control the engine to enter the braking mode, and based on the comparison result between the slope and the second slope threshold, control the engine to operate in the braking mode at the target braking level, and control the generator connected to the engine to perform power output, and consume electric energy by the way of the generator dragging the engine in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, does not require additional components, can reduce the economic loss while ensuring the driving safety of the range-extended vehicle, does not occupy the vehicle layout space, and does not bring additional losses.

[0029] In a third aspect, the present application provides a range-extended vehicle, including:

[0030] An engine;

[0031] A generator, the generator is connected to the engine;

[0032] A battery, wherein the battery and the generator are connected to the same high-voltage busbar;

[0033] The control device as described in the second aspect above, wherein the control device is connected to the engine, the generator, and the battery.

[0034] In the range-extended vehicle according to the present application, when the slope of the downhill on the driving road is greater than the first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery, the engine is controlled to enter the braking mode, and based on the comparison result of the slope and the second slope threshold, the engine is controlled to operate in the braking mode of the target braking level, and the generator connected to the engine is controlled to perform power output, and the electric energy is consumed by the way of the generator dragging the engine in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, does not require additional components, can reduce the economic loss while ensuring the driving safety of the range-extended vehicle, does not occupy the layout space of the vehicle, and does not cause additional losses.

[0035] In a fourth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the computer program, the control method of the range-extended vehicle as described in the first aspect above is implemented.

[0036] In a fifth aspect, the present application provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the control method of the range-extended vehicle as described in the first aspect above is implemented.

[0037] In a sixth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, the control method of the range-extended vehicle as described in the first aspect above is implemented.

[0038] The additional aspects and advantages of the present application will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0039] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0040] Figure 1 is one of the flow schematic diagrams of the control method of the range-extended vehicle provided by the embodiment of the present application;

[0041] Figure 2 is a schematic diagram of braking control of the range-extended vehicle provided by the embodiment of the present application;

[0042] Figure 3 It is a schematic diagram of the system architecture corresponding to the control method of the range-extended vehicle provided by the embodiment of the present application;

[0043] Figure 4 It is the second schematic flowchart of the control method of the range-extended vehicle provided by the embodiment of the present application;

[0044] Figure 5 It is a schematic diagram of the structure of the range-extended vehicle provided by the embodiment of the present application;

[0045] Figure 6 It is a schematic diagram of the structure of the control device of the range-extended vehicle provided by the embodiment of the present application;

[0046] Figure 7 It is a schematic diagram of the structure of the electronic device provided by the embodiment of the present application.

[0047] Reference numerals:

[0048] Engine 510, generator 520, battery 530, electric drive system 540. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0050] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0051] Next, in conjunction with the accompanying drawings, the control method of the range-extended vehicle, the control device of the range-extended vehicle, the range-extended vehicle, the electronic device, and the readable storage medium provided by the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.

[0052] Among them, the control method of the range-extended vehicle can be applied to a terminal, and specifically can be executed by hardware or software in the terminal.

[0053] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablet computers having a touch-sensitive surface (e.g., a touch screen display and / or a touchpad). It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer having a touch-sensitive surface (e.g., a touch screen display and / or a touchpad).

[0054] In the following various embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse, and a joystick.

[0055] The control method of the range-extended vehicle provided by the embodiments of the present application. The execution subject of the control method of the range-extended vehicle may be an electronic device or a functional module or functional entity in the electronic device that can implement the control method of the range-extended vehicle. The electronic devices mentioned in the embodiments of the present application include, but are not limited to, computers, etc. Hereinafter, taking the electronic device as the execution subject as an example, the control method of the range-extended vehicle provided by the embodiments of the present application will be described.

[0056] The range-extended vehicle provided by the embodiments of the present application can drive the generator 520 to generate electric energy through the engine 510, directly drive the vehicle to run by the electric drive system 540, and realize the electric energy transmission of the generator 520, the battery 530, and the electric drive system 540 through the high-voltage bus.

[0057] As Figure 5 shown, the range-extended vehicle includes an engine 510, a generator 520, a battery 530, and an electric drive system 540. The engine 510 is connected to the generator 520. The electric drive system 540 directly drives the vehicle to run. The drive motors in the generator 520, the battery 530, and the electric drive system 540 share the high-voltage bus.

[0058] Among them, the engine 510 can be a gasoline engine or a diesel engine, etc., and can drive the generator 520 to generate electricity. The generator 520 can convert the mechanical energy of the engine 510 into electric energy. The electric energy generated by the generator 520 can be supplied to the electric drive system 540 or stored in the battery 530. The battery 530 is used to store electric energy for the vehicle to run in pure electric mode or for auxiliary driving. The electric drive system 540 includes a drive motor and an electronic control system. The drive motor is used to directly drive the vehicle to run.

[0059] When the vehicle is driving, the engine 510 generates electric power through the generator 520 for the vehicle to run. When the vehicle brakes, the electric drive system 540 recovers the electric power into the battery 530 through regenerative braking.

[0060] The control of the range-extended vehicle provided by the embodiments of the present application is used to perform braking control on the range-extended vehicle.

[0061] As Figure 1 shown, the control method of the range extender vehicle includes: step 110 - step 140.

[0062] Step 110, obtain the slope of the downhill on the driving road of the range extender vehicle.

[0063] Among them, the driving road is the road passed by the range extender vehicle when driving, downhill means that the road on which the range extender vehicle drives is inclined downward, and the slope refers to the degree of inclination of the road.

[0064] In this step, the slope of the driving road can be deduced by setting an acceleration sensor and a gyroscope on the range extender vehicle to measure the inclination angle of the range extender vehicle, or by using the Global Positioning System (GPS) and high-precision map data, etc., to obtain the geographical information of the current position of the range extender vehicle, and calculate the slope of the driving road by comparing the height changes of consecutive position points.

[0065] Step 120, when the slope is greater than the first slope threshold, control the range extender vehicle to perform regenerative braking to charge its own battery 530, and control the engine 510 of the range extender vehicle to enter the braking mode.

[0066] Among them, the first slope threshold is a set slope value, and the first slope threshold can be determined according to the weight and model of the range extender vehicle, etc.

[0067] Regenerative braking is a braking method that converts the kinetic energy of the range extender vehicle into electrical energy through the electric drive system 540 and stores it in the battery 530. The braking mode of the engine 510 is a mode that uses its own running resistance to assist the range extender vehicle to decelerate.

[0068] In this embodiment, when the slope is greater than the first slope threshold, it indicates that the slope of the downhill is relatively large, and the resistance provided by regenerative braking may not be sufficient to offset the gravitational acceleration brought by the downhill, and the range extender vehicle cannot maintain a constant speed.

[0069] When the slope is greater than the first slope threshold, while the range extender vehicle performs regenerative braking, control the engine 510 to enter the braking mode.

[0070] Step 130, based on the comparison result between the slope and the second slope threshold, determine the target braking level of the braking mode, and the second slope threshold is greater than the first slope threshold.

[0071] Among them, the second slope threshold is a set slope value, and the second slope threshold can be determined according to the weight and model of the range extender vehicle, etc.

[0072] The braking level is used to characterize the level of the braking force of the engine 510. Different comparison results between the slope and the second slope threshold can correspond to braking modes with different non-braking levels. The target braking level is the braking level of the braking mode determined according to the comparison result between the slope and the second slope threshold.

[0073] In this step, the slope is compared with the second slope threshold in terms of magnitude. According to different comparison results, different braking levels are determined as the target braking level.

[0074] Step 140: Control the engine 510 to operate in the braking mode of the target braking level, and control the generator 520 connected to the engine 510 to perform power output to conduct braking control on the range-extended vehicle.

[0075] In this step, according to the target braking level, the working state of the engine 510 is controlled to make the engine 510 operate in the braking mode of the target braking level to adapt to different working conditions of the range-extended vehicle. The generator 520 connected to the engine 510 in the braking mode outputs power to the engine 510, and the electric energy is consumed by the way of the generator 520 dragging the engine 510 in reverse to conduct braking control on the range-extended vehicle in combination with regenerative braking.

[0076] In the related art, additional components are usually set up to consume electric energy through the additional components when the battery recovery ability is insufficient to improve the electric braking ability of the vehicle. However, setting up additional components will increase the cost to a certain extent, require space for vehicle layout, and cause additional losses.

[0077] For example, a load resistor is installed on the high-voltage bus. When risks are encountered during vehicle braking, the load resistor is connected to consume electric energy to increase the braking torque of the vehicle. However, it is necessary to increase the cost to a certain extent, and the load resistor has a large volume and requires a large heat dissipation requirement, thus requiring a large layout space in the vehicle.

[0078] For another example, an eddy current retarder is additionally installed on the vehicle. When the braking torque is insufficient, the eddy current retarder is turned on to improve the braking ability of the vehicle. However, the added eddy current retarder will generate additional losses, reducing the economy of the vehicle, and it is not convenient to arrange the eddy current retarder on the transmission system.

[0079] According to the control method of a range-extended vehicle provided by an embodiment of the present application, when the slope of a downhill section on a driving road is greater than a first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery 530, the engine 510 is controlled to enter a braking mode, and based on the comparison result between the slope and a second slope threshold, the engine 510 is controlled to operate in a braking mode at a target braking level, and the generator 520 connected to the engine 510 is controlled to perform power output, and the electric energy is consumed by the way of the generator 520 dragging the engine 510 in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, without the need to additionally add components, can reduce the economic loss while ensuring the driving safety of the range-extended vehicle, does not occupy the vehicle layout space, and will not cause additional losses.

[0080] In some embodiments, controlling the generator 520 connected to the engine 510 to perform power output includes:

[0081] Based on the slope, operating parameters, and mass parameters of the range-extended vehicle, determining the braking demand power of the range-extended vehicle;

[0082] Based on the braking demand power and the rechargeable power of the battery 530, determining the target braking power of the engine 510;

[0083] Based on the comparison result between the target braking power and a braking power threshold, adjusting the output power of the generator 520.

[0084] Wherein, the operating parameters are parameters characterizing the operating state of the range-extended vehicle, which may include vehicle speed, acceleration, whether the driver steps on the brake for braking, and the magnitude of the braking force provided by the brake braking, etc., and the mass parameters are parameters characterizing the total weight of the range-extended vehicle, including the weight of the vehicle itself, the weight of passengers and goods, etc.

[0085] The braking demand power is the power that the range-extended vehicle needs to consume during the braking process while maintaining a constant speed.

[0086] In this embodiment, the braking demand power can be determined according to the slope, operating parameters, and mass parameters through the law of conservation of energy and the kinetic equation.

[0087] In this embodiment, the rechargeable power is the maximum rechargeable power that the battery 530 can accept, and the target braking power is the braking power expected to be provided by the engine 510. The difference between the braking demand power and the rechargeable power can be determined as the target braking power.

[0088] In this embodiment, the braking power threshold is a preset value, which can be set according to the operating requirements of the range-extended vehicle and the operating performance of the engine 510, etc.

[0089] The target braking power can be compared with the braking power threshold, and according to different comparison results, the output power of the generator 520 can be adjusted in different directions.

[0090] In some embodiments, based on the comparison result of the target braking power and the braking power threshold, adjusting the output power of the generator 520 includes:

[0091] When the target braking power is greater than the braking power threshold, increase the output power of the generator 520;

[0092] Or, when the target braking power is less than or equal to the braking power threshold, decrease the output power of the generator 520.

[0093] In this embodiment, when the target braking power is greater than the braking power threshold, it indicates that the generator 520 is currently outputting power, and the electric energy consumed by the counter-dragging engine 510 is insufficient. Increasing the output power of the generator 520 can increase the braking power of the generator 520, so that the braking power can be increased to the target braking power, improving the safety of vehicle operation.

[0094] In this embodiment, when the target braking power is less than or equal to the braking power threshold, it indicates that the generator 520 is currently outputting power, and the electric energy consumed by the counter-dragging engine 510 is excessive. Decreasing the output power of the generator 520 can reduce the braking power to the target braking power, reducing power loss.

[0095] In some embodiments, the braking levels of the braking mode include a first braking level and a second braking level. The braking force provided by the engine 510 under the second braking level is greater than the braking force provided by the engine 510 under the first braking level. Based on the comparison result of the slope and the second slope threshold, determining the target braking level of the braking mode includes:

[0096] When the slope is greater than the second slope threshold, determine the target braking level as the second braking level;

[0097] Or, when the slope is less than or equal to the second slope threshold, determine the target braking level as the first braking level.

[0098] In this embodiment, the braking mode of the first braking level can be the braking mode when the engine 510 is shut down, and the braking mode of the second braking level can be the braking mode when the engine 510 is shut down and the engine 510 performs in-cylinder braking.

[0099] In this embodiment, a slope greater than the second slope threshold indicates that the downhill slope is very large, and the resistance provided by the engine 510 for braking through shutdown control may not be sufficient to offset the gravitational acceleration caused by going downhill. Therefore, the engine 510 performs in-cylinder braking to increase the braking force and keep the range-extended vehicle running at a constant speed.

[0100] A slope less than or equal to the second slope threshold indicates that the resistance provided by the engine 510 for braking through shutdown control is sufficient to offset the gravitational acceleration caused by going downhill. Therefore, the engine 510 is controlled to stop for braking, which improves the driving safety of the vehicle while reducing losses.

[0101] In some embodiments, after obtaining the slope of the downhill section of the driving road of the range-extended vehicle, the method further includes:

[0102] When the slope is greater than the third slope threshold and less than or equal to the first slope threshold, the range-extended vehicle is controlled to perform regenerative braking to charge its own battery 530.

[0103] Wherein, the third slope threshold is a set slope value, and the third slope threshold can be determined according to the weight and vehicle type of the range-extended vehicle, etc.

[0104] A slope greater than the third slope threshold and less than or equal to the first slope threshold indicates that there is a slope on the driving road and braking control is required. Since the slope is small, the resistance provided by regenerative braking is sufficient to offset the gravitational acceleration caused by going downhill, enabling the range-extended vehicle to maintain a constant speed.

[0105] When the slope is greater than the third slope threshold and less than or equal to the first slope threshold, the range-extended vehicle is controlled to perform regenerative braking to charge its own battery 530 and perform braking control. The engine 510 can run at idle speed.

[0106] As Figure 2 shown, when the slope torque of the range-extended vehicle is greater than the electric drive regenerative torque of the range-extended vehicle, the braking of the vehicle will be in a potentially out-of-control state. The way of starting the engine 510 to be dragged in reverse can be used to consume electric energy to increase the braking power of the range-extended vehicle and ensure the safety of vehicle operation.

[0107] When the power system of the range-extended vehicle is operating at point A, the slope torque generated by the ramp is less than the electric drive regenerative torque. The engine 510 in the range-extended system runs at idle speed, and the generator 520 does not output torque.

[0108] When the power system of the range-extended vehicle is operating at point B, the slope torque generated by the ramp is slightly greater than the electric drive regenerative torque. The engine 510 is controlled to stop, a fuel cut-off command is issued, and the speed of the generator 520 is adjusted, thereby adjusting the output power.

[0109] When the power system of the range-extended vehicle is operating at point C, the slope torque generated by the ramp is significantly greater than the electric drive feedback torque. The engine 510 is controlled to start the in-cylinder control mode to provide sufficient braking power reserve, the engine 510 is controlled to stop, a fuel cut-off command is issued, and the speed of the generator 520 is adjusted, thereby adjusting the output power.

[0110] The following introduces the system architecture corresponding to a control method for a range-extended vehicle.

[0111] As Figure 3 shown, according to the slope, the operating parameters and the mass parameters of the range-extended vehicle, the braking demand power of the range-extended vehicle is calculated. According to the braking demand power, the rechargeable power of the battery 530 and the braking power demand corresponding to the driver stepping on the brake, the target braking power of the engine 510 is determined. The engine 510 is subjected to back-dragging control analysis according to the target braking power, and the speed of the generator 520 is adjusted according to the analysis result and the driver's braking power demand.

[0112] The following introduces a specific embodiment of a control method for a range-extended vehicle.

[0113] The back-dragging control trigger condition of the engine 510 is that the braking demand power is greater than the rechargeable power, and the speed of the generator 520 is adjusted according to the deviation between the target braking power and the braking power threshold.

[0114] As Figure 4 shown, when the range-extended vehicle is driving normally, the range-extended system is used to generate electricity to meet the full-load electric drive demand.

[0115] When the downhill slope is greater than the first slope threshold α1, the engine 510 is controlled to stop to consume electric energy. The braking demand power minus the rechargeable power is used to obtain the target braking power. The target braking power is compared with the braking power threshold ΔP 1 When the target braking power is greater than the braking power threshold ΔP 1 to increase the safety of the range-extended vehicle, the electric consumption is increased, the speed of the generator 520 is controlled to increase, and the electric consumption capacity of the range extender is improved. When the target braking power is less than the braking power threshold ΔP 1 to reduce the energy consumption loss of the range-extended vehicle, the electric consumption needs to be reduced, the speed of the generator 520 is controlled to decrease, and the electric consumption capacity of the range extender is reduced.

[0116] When the downhill slope is greater than α2, the slope increases, and the range extender needs to provide greater ability to consume electric energy. The engine 510 is controlled to stop, and in-cylinder braking control is turned on to consume electric energy. When the target braking power is greater than the braking power threshold ΔP 1 to increase the safety of the range-extended vehicle, the electric consumption is increased, the speed of the generator 520 is controlled to increase, and the electric consumption capacity of the range extender is improved. When the target braking power is less than the braking power threshold ΔP1 When reducing the energy consumption loss of a range-extended vehicle, it is necessary to reduce the power consumption, control the speed of the generator 520 to decrease, and reduce the power consumption ability of the range extender.

[0117] The control method of the range-extended vehicle provided by the embodiment of the present application improves the electric power consumption of the bus by changing the control mode of the range-extending system, so as to improve the braking ability of the range-extended vehicle, and there are no problems of increased cost and additional layout of the range-extended vehicle.

[0118] For the control method of the range-extended vehicle provided by the embodiment of the present application, the execution subject may be the control device of the range-extended vehicle. In the embodiment of the present application, taking the control device of the range-extended vehicle executing the control method of the range-extended vehicle as an example, the control device of the range-extended vehicle provided by the embodiment of the present application is described.

[0119] The embodiment of the present application also provides a control device for a range-extended vehicle.

[0120] As Figure 6 shown, the control device of the range-extended vehicle includes:

[0121] An acquisition module 610, configured to acquire the slope of a downhill section in the driving road of the range-extended vehicle;

[0122] A first processing module 620, configured to control the range-extended vehicle to perform regenerative braking to charge its own battery 530 and control the engine 510 of the range-extended vehicle to enter the braking mode when the slope is greater than a first slope threshold;

[0123] A second processing module 630, configured to determine the target braking level of the braking mode based on the comparison result between the slope and a second slope threshold, and the second slope threshold is greater than the first slope threshold;

[0124] A third processing module 640, configured to control the engine 510 to operate in the braking mode at the target braking level and control the generator 520 connected to the engine 510 to perform power output, so as to perform braking control on the range-extended vehicle.

[0125] According to the control device of the range-extended vehicle provided by the embodiments of the present application, when the slope of the downhill on the driving road is greater than the first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery 530, the engine 510 is controlled to enter the braking mode, and based on the comparison result of the slope and the second slope threshold, the engine 510 is controlled to operate in the braking mode of the target braking level, and the generator 520 connected to the engine 510 is controlled to perform power output, and the electric energy is consumed by the way of the generator 520 dragging the engine 510 in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, does not require additional components, can reduce the loss of economy while ensuring the driving safety of the range-extended vehicle, does not occupy the layout space of the vehicle, and does not bring additional losses.

[0126] In some embodiments, the third processing module 640 is configured to determine the braking demand power of the range-extended vehicle based on the slope, the operating parameters and the mass parameters of the range-extended vehicle;

[0127] Based on the braking demand power and the rechargeable power of the battery 530, determine the target braking power of the engine 510;

[0128] Based on the comparison result of the target braking power and the braking power threshold, adjust the output power of the generator 520.

[0129] In some embodiments, the third processing module 640 is configured to increase the output power of the generator 520 when the target braking power is greater than the braking power threshold;

[0130] Or, when the target braking power is less than or equal to the braking power threshold, reduce the output power of the generator 520.

[0131] In some embodiments, the braking levels of the braking mode include a first braking level and a second braking level, and the braking force provided by the engine 510 in the second braking level is greater than the braking force provided by the engine 510 in the first braking level. The second processing module 630 is configured to determine that the target braking level is the second braking level when the slope is greater than the second slope threshold;

[0132] Or, when the slope is less than or equal to the second slope threshold, determine that the target braking level is the first braking level.

[0133] In some embodiments, the first processing module 620 is further configured to control the range-extended vehicle to perform regenerative braking to charge its own battery 530 when the slope is greater than the third slope threshold and less than or equal to the first slope threshold.

[0134] The control device of the range-extended vehicle in the embodiments of the present application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices other than the terminal. Exemplarily, the electronic device can be an ultra-mobile personal computer (UMPC), etc., and can also be a server, a personal computer (PC), etc. The embodiments of the present application do not make specific limitations.

[0135] The control device of the range-extended vehicle in the embodiments of the present application can be a device with an operating system. The operating system can be the Android operating system, the IOS operating system, or other possible operating systems. The embodiments of the present application do not make specific limitations.

[0136] The control device of the range-extended vehicle provided by the embodiments of the present application can implement Figure 1 and Figure 4 each process implemented by the method embodiments. To avoid repetition, it will not be elaborated here.

[0137] The embodiments of the present application also provide a range-extended vehicle.

[0138] As Figure 5 shown, the range-extended vehicle includes an engine 510, a generator 520, a battery 530, and the above control device.

[0139] Among them, the generator 520 is connected to the engine 510, the battery 530 and the generator 520 are connected to the same high-voltage bus, and the control device is connected to the engine 510, the generator 520, and the battery 530.

[0140] According to the range-extended vehicle provided by the embodiments of the present application, when the slope of the downhill on the driving road is greater than the first slope threshold, in addition to controlling the range-extended vehicle to perform regenerative braking to charge its own battery 530, the engine 510 is controlled to enter the braking mode, and based on the comparison result between the slope and the second slope threshold, the engine 510 is controlled to operate in the braking mode of the target braking level, and the generator 520 connected to the engine 510 is controlled to perform power output, and the electric energy is consumed by the way of the generator 520 dragging the engine 510 in reverse, so as to perform braking control on the range-extended vehicle in combination with regenerative braking, which can improve the braking ability of the range-extended vehicle, does not require additional components, can reduce the economic loss while ensuring the driving safety of the range-extended vehicle, does not occupy the layout space of the vehicle, and does not bring additional losses.

[0141] In some embodiments, as Figure 7As shown in the figure, an embodiment of the present application further provides an electronic device 700, including a processor 701, a memory 702, and a computer program stored on the memory 702 and executable on the processor 701. When the program is executed by the processor 701, it implements each process of the above-described embodiment of the control method for an extended-range vehicle and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0142] It should be noted that the electronic device in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0143] An embodiment of the present application further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements each process of the above-described embodiment of the control method for an extended-range vehicle and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0144] Wherein, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs.

[0145] An embodiment of the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the above-described control method for an extended-range vehicle.

[0146] Wherein, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs.

[0147] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement each process of the above-described embodiment of the control method for an extended-range vehicle and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0148] It should be understood that the chip mentioned in the embodiment of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-a-chip.

[0149] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0150] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0151] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

[0152] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0153] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method for an extended-range vehicle, characterized in that: include: Obtaining a downhill slope of a driving road of the extended-range vehicle; When the slope is greater than a first slope threshold, controlling the range-extended vehicle to perform regenerative braking to charge its own battery, and controlling the engine of the range-extended vehicle to enter a braking mode; determining a target braking level of the braking mode based on a comparison result of the slope and a second slope threshold, the second slope threshold being greater than the first slope threshold; The engine is controlled to operate in the braking mode at the target braking level, and a generator connected to the engine is controlled to output power, so as to perform braking control on the range-extended vehicle.

2. The control method of the extended-range vehicle according to claim 1, characterized in that: The step of controlling the generator connected to the engine to output power comprises: Determining a braking power requirement of the extended-range vehicle based on the slope, an operating parameter of the extended-range vehicle, and a mass parameter; determining a target braking power of the engine based on the braking demand power and the chargeable power of the battery; Based on the comparison result between the target braking power and the braking power threshold, the output power of the generator is adjusted.

3. The control method of the extended-range vehicle according to claim 2, characterized in that: The step of adjusting the output power of the generator based on the comparison result between the target braking power and the braking power threshold comprises: When the target braking power is greater than the braking power threshold, increasing the output power of the generator; Alternatively, when the target braking power is less than or equal to the braking power threshold, the output power of the generator is reduced.

4. The control method of the extended-range vehicle according to claim 1, characterized in that: The braking level of the braking mode includes a first braking level and a second braking level, the braking force provided by the engine at the second braking level is greater than the braking force provided by the engine at the first braking level, and the determining the target braking level of the braking mode based on the comparison result between the slope and the second slope threshold value includes: When the slope is greater than the second slope threshold, determining the target braking level to be the second braking level; Alternatively, when the slope is less than or equal to the second slope threshold, the target braking level is determined to be the first braking level.

5. The control method of the extended-range vehicle according to any one of claims 1 to 4, characterized in that: After obtaining the downhill slope of the driving road of the extended-range vehicle, the method further includes: When the slope is greater than a third slope threshold and less than or equal to the first slope threshold, the range-extended vehicle is controlled to perform regenerative braking to charge its own battery.

6. A control device for an extended-range vehicle, characterized in that: include: An acquisition module, used to acquire the downhill slope of the driving road of the extended-range vehicle; A first processing module is used to control the extended-range vehicle to perform regenerative braking to charge its own battery when the slope is greater than a first slope threshold, and to control the engine of the extended-range vehicle to enter a braking mode; a second processing module, configured to determine a target braking level of the braking mode based on a comparison result of the slope and a second slope threshold, the second slope threshold being greater than the first slope threshold; The third processing module is used to control the engine to operate in the braking mode of the target braking level, and control the generator connected to the engine to output power, so as to perform braking control on the extended-range vehicle.

7. An extended-range vehicle, characterized in that: include: engine; a generator connected to the engine; A battery, wherein the battery and the generator are connected to the same high-voltage bus; The control device as claimed in claim 6, wherein the control device is connected to the engine, the generator and the battery.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the control method of the extended-range vehicle as described in any one of claims 1 to 5 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the extended-range vehicle as described in any one of claims 1 to 5 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the control method of the extended-range vehicle as described in any one of claims 1 to 5 is implemented.

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