Braking control method and device of range-extended vehicle and range-extended mine car

Abstract

The application discloses a kind of brake control method, device and range-extended mine car of range-extended vehicle.The brake control method of range-extended vehicle includes obtaining vehicle pedal depression value;According to vehicle pedal depression value, obtain the whole vehicle braking force demand value, wherein the whole vehicle braking force demand value includes first whole vehicle braking force demand value, second whole vehicle braking force demand value and third whole vehicle braking force demand value, first whole vehicle braking force demand value is greater than second whole vehicle braking force demand value, second whole vehicle braking force demand value is greater than third whole vehicle braking force demand value;According to the whole vehicle braking force demand value determination braking mode, to carry out brake control to range-extended vehicle.Combination braking demand corresponds to different braking mode, to guarantee range-extended vehicle braking reliable, improve whole vehicle braking effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a brake control method and device of a range-extended vehicle and the range-extended vehicle. BACKGROUND

[0002] Traditional fuel mine vehicles are affected due to high energy consumption and serious pollution. Pure electric mine vehicles have the advantages of high efficiency and zero emission, but the current battery technology is limited, and the endurance mileage of the mine truck is limited. At present, the range-extended mine vehicle is increasingly concerned. The range-extended mine vehicle frequently accelerates and brakes during transportation, resulting in frequent energy transmission and conversion of the system. Different power generation powers are usually used to achieve different brake force outputs, resulting in a large amount of unnecessary electric energy loss. SUMMARY

[0003] The present application provides a brake control method and device of a range-extended vehicle and a range-extended mine vehicle to ensure the reliability of the brake of the range-extended vehicle and improve the brake effect of the vehicle.

[0004] In a first aspect, the present application provides a brake control method of a range-extended vehicle, comprising:

[0005] obtaining a vehicle pedal depression value;

[0006] obtaining a vehicle pedal depression value;

[0007] determining a brake mode according to the vehicle brake force demand value to control the brake of the range-extended vehicle.

[0008] Optionally, before obtaining the vehicle brake force demand value according to the vehicle pedal depression information, the method further comprises:

[0009] obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0010] Optionally, obtaining the vehicle brake force demand value according to the vehicle pedal depression value comprises:

[0011] obtaining the vehicle brake force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value.

[0012] Optionally, obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value comprises:

[0013] obtaining a second whole vehicle braking force demand value when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value;

[0014] determining the braking mode according to the whole vehicle braking force demand value comprises:

[0015] obtaining a battery SOC value, a preset battery SOC value and a maximum motor braking force;

[0016] determining the braking mode according to the battery SOC value, the preset battery SOC value, the maximum motor braking force and the second whole vehicle braking force demand value.

[0017] Optionally, the braking mode comprises a motor braking mode, an engine in-cylinder braking mode, an engine in-cylinder and motor hybrid braking mode and an engine in-cylinder and hydraulic hybrid braking mode;

[0018] determining the braking mode according to the battery SOC value, the preset battery SOC value, the maximum motor braking force and the whole vehicle braking force demand value comprises:

[0019] determining the motor braking mode when the battery SOC value is greater than the preset battery SOC value and the maximum motor braking force is greater than the second whole vehicle braking force demand value;

[0020] determining the engine in-cylinder and motor hybrid braking mode when the battery SOC value is greater than the preset battery SOC value and the maximum motor braking force is less than or equal to the second whole vehicle braking force demand value;

[0021] determining the engine in-cylinder and hydraulic hybrid braking mode when the battery SOC value is less than or equal to the preset battery SOC value.

[0022] Optionally, obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value comprises:

[0023] obtaining a third whole vehicle braking force demand value when the vehicle pedal depression value is less than the first preset vehicle pedal depression value;

[0024] determining the braking mode according to the whole vehicle braking force demand value comprises:

[0025] obtaining a battery SOC value and a preset battery SOC value;

[0026] determining a braking mode according to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value.

[0027] Optionally, the braking mode includes an electric motor braking mode, an engine cylinder braking mode, an engine cylinder and electric motor hybrid braking mode and an engine cylinder and hydraulic hybrid braking mode.

[0028] determining a braking mode according to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value includes:

[0029] determining the electric motor braking mode according to the third vehicle braking force demand value and when the battery SOC value is greater than the preset battery SOC value.

[0030] determining the engine cylinder braking mode according to the third vehicle braking force demand value and when the battery SOC value is less than or equal to the preset battery SOC value.

[0031] Optionally, the braking mode includes an electric motor braking mode, an engine cylinder braking mode, an engine cylinder and electric motor hybrid braking mode and an engine cylinder and hydraulic hybrid braking mode.

[0032] obtaining a vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value includes:

[0033] obtaining a first vehicle braking force demand value when the vehicle pedal depression value is greater than the second preset vehicle pedal depression value.

[0034] determining a braking mode according to the vehicle braking force demand value includes:

[0035] determining an engine cylinder and hydraulic hybrid braking mode according to the first vehicle braking force demand value.

[0036] In a second aspect, the present application provides a brake control device of a range extending vehicle, and the brake control method of the range extending vehicle in any one of the first aspect is executed by the brake control device of the range extending vehicle, and the brake control device of the range extending vehicle includes:

[0037] a vehicle pedal depression value obtaining module, configured to obtain a vehicle pedal depression value.

[0038] The vehicle brake force demand value acquisition module is configured to acquire a vehicle brake force demand value according to the vehicle pedal depression value, wherein the vehicle brake force demand value comprises a first vehicle brake force demand value, a second vehicle brake force demand value and a third vehicle brake force demand value, the first vehicle brake force demand value is greater than the second vehicle brake force demand value, and the second vehicle brake force demand value is greater than the third vehicle brake force demand value.

[0039] The brake mode determination module is configured to determine a brake mode according to the vehicle brake force demand value, so as to perform brake control on the range-extended vehicle.

[0040] In a third aspect, the present application provides a range-extended mine vehicle, comprising an engine, a generator, a power battery and a controller, wherein the controller is connected with the engine, the generator and the power battery respectively.

[0041] The controller is configured to perform the brake control method of the range-extended vehicle according to any one of the first aspect.

[0042] The technical scheme of the embodiment of the present application provides a brake control method of a range-extended vehicle, which comprises acquiring a vehicle pedal depression value, acquiring a vehicle brake force demand value according to the vehicle pedal depression value, wherein the vehicle brake force demand value comprises a first vehicle brake force demand value, a second vehicle brake force demand value and a third vehicle brake force demand value, the first vehicle brake force demand value is greater than the second vehicle brake force demand value, and the second vehicle brake force demand value is greater than the third vehicle brake force demand value, and determining a brake mode according to the vehicle brake force demand value, so as to perform brake control on the range-extended vehicle. Different brake modes are combined according to brake demands, so as to ensure the brake reliability of the range-extended vehicle and improve the vehicle brake effect.

[0043] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0045] Figure 1 A flow chart of the first brake control method of the range-extended vehicle provided by the embodiment of the present application is shown in FIG. 1.

[0046] Figure 2A structure schematic diagram of a range extending vehicle provided by an embodiment of the present application is provided.

[0047] Figure 3 A flow chart of a second brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0048] Figure 4 A flow chart of a third brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0049] Figure 5 A flow chart of a fourth brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0050] Figure 6 A flow chart of a fifth brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0051] Figure 7 A flow chart of a sixth brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0052] Figure 8 A flow chart of a seventh brake control method of a range extending vehicle provided by an embodiment of the present application is provided.

[0053] Figure 9 A structure schematic diagram of a brake control device of a range extending vehicle provided by an embodiment of the present application is provided. DETAILED DESCRIPTION

[0054] In order to make the personnel in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0055] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0056] Figure 1 A flow chart of a brake control method of a range extended vehicle is provided for an embodiment of the present application, Figure 2 A structural schematic diagram of a range extended vehicle is provided for an embodiment of the present application, as shown in Figure 1 and Figure 2 The present embodiment can be applied to brake control of a range extended vehicle. The method can be executed by a brake control device of the range extended vehicle, which can be realized in the form of hardware and / or software, and can be arranged in the range extended vehicle. The range extended vehicle is provided with at least a vehicle control unit 10, an engine control unit 11, a motor control unit 12, an engine 13, a generator 14, a motor 15, a power battery 16, a hydraulic brake unit 17 and a power converter 18. The vehicle control unit 10 is connected with the engine control unit 11, the motor control unit 12, the hydraulic brake unit 17 and the power battery 16 respectively. The engine control unit 11 is connected with the engine 13. The engine 13 is connected with the generator 14. The generator 14 is connected with the power battery 16. The motor control unit 12 is connected with the motor 15. The power converter 18 is connected with the generator 14, the power battery 16 and the motor 15 respectively. The power converter 18 can efficiently convert electric energy of different voltages, currents or frequencies to realize conversion and output of the electric energy output by the generator 14 to the power battery 16 and the motor 15. The range extended vehicle retains the hydraulic brake unit 17 and increases the motor 15 brake control on the drive shaft to form a hybrid brake system, adjust the mechanical rotating device and control the wheels to ensure reliable brake of the range extended vehicle and improve the brake effect of the vehicle. Figure 1 The brake control method of the range extended vehicle includes the following steps.

[0057] S101, acquiring a vehicle pedal depression value.

[0058] The range extended vehicle can be provided with a vehicle pedal depression acquisition unit, which can be a Hall sensor or a pressure sensor. The vehicle pedal depression acquisition unit is connected with the vehicle control unit, so that when a driver steps on the vehicle pedal to brake, the vehicle pedal depression acquisition unit acquires the vehicle pedal depression value and outputs it to the vehicle control unit, so that the vehicle control unit can timely acquire the vehicle pedal depression value to timely acquire the brake demand.

[0059] S102, acquiring a vehicle brake demand value according to the vehicle pedal depression value, wherein the vehicle brake demand value includes a first vehicle brake demand value, a second vehicle brake demand value and a third vehicle brake demand value. The first vehicle brake demand value is greater than the second vehicle brake demand value, and the second vehicle brake demand value is greater than the third vehicle brake demand value.

[0060] The vehicle control unit calculates a vehicle braking force demand value according to the obtained vehicle pedal depression value, the vehicle braking force demand value includes a first vehicle braking force demand value, a second vehicle braking force demand value and a third vehicle braking force demand value, the first vehicle braking force demand value is greater than the second vehicle braking force demand value, and the second vehicle braking force demand value is greater than the third vehicle braking force demand value, that is, when the vehicle pedal depression value is large, the vehicle braking force demand value is large, and when the vehicle pedal depression value is small, the vehicle braking force demand value is small.

[0061] S103, determining a braking mode according to the vehicle braking force demand value to control braking of the range extending vehicle.

[0062] The vehicle control unit selects different braking modes according to the vehicle braking force demand value to realize accurate braking of the range extending vehicle, ensure reliable braking of the range extender vehicle, and improve the vehicle braking effect.

[0063] The embodiment of the application obtains a vehicle pedal depression value, obtains a vehicle braking force demand value according to the vehicle pedal depression value, wherein the vehicle braking force demand value includes a first vehicle braking force demand value, a second vehicle braking force demand value and a third vehicle braking force demand value, the first vehicle braking force demand value is greater than the second vehicle braking force demand value, and the second vehicle braking force demand value is greater than the third vehicle braking force demand value, and determines a braking mode according to the vehicle braking force demand value to control braking of the range extending vehicle. Different braking modes are combined according to braking requirements to ensure reliable braking of the range extending vehicle and improve the vehicle braking effect.

[0064] Optionally, Figure 3 A flowchart of a second braking control method of a range extending vehicle provided by the embodiment of the application is shown in FIG. 2, and the braking control method of the range extending vehicle includes the following steps. Figure 3

[0065] S201, obtaining a vehicle pedal depression value.

[0066] S202, obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0067] The preset vehicle pedal depression value is obtained in advance, and specifically includes a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value, and the values of the first preset vehicle pedal depression value and the second preset vehicle pedal depression value can be set according to actual design requirements, which are not limited in the embodiment of the application.

[0068] ​S202, obtain a whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value; wherein the whole vehicle braking force demand value comprises a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value.

[0069] The whole vehicle control unit can compare the vehicle pedal depression value with the range formed by the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, so as to accurately obtain the whole vehicle braking force demand value.

[0070] S204, determine a braking mode according to the whole vehicle braking force demand value, so as to control braking of the range extending vehicle.

[0071] The embodiment of the application obtains a vehicle pedal depression value, obtains a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value, obtains a whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, and determines a braking mode according to the whole vehicle braking force demand value, so as to control braking of the range extending vehicle. Different braking modes are combined according to braking demands, so as to ensure reliable braking of the range extending vehicle and improve whole vehicle braking effect.

[0072] Optionally, Figure 4 A third range extending vehicle braking control method is provided in the embodiment of the application, as shown in a flowchart thereof, Figure 4 The range extending vehicle braking control method comprises the following steps.

[0073] S301, obtain a vehicle pedal depression value.

[0074] S302, obtain a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0075] S303, when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, obtain a second whole vehicle braking force demand value; wherein the whole vehicle braking force demand value comprises a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value.

[0076] Among them, when the vehicle pedal pedal value is greater than the first preset vehicle pedal pedal value and the vehicle pedal pedal value is less than the second preset vehicle pedal pedal value, the vehicle control unit obtains the braking requirement at this time according to the vehicle pedal pedal value, which is the second vehicle braking force requirement value among the vehicle braking force requirement values.

[0077] S304 , obtaining a battery SOC value, a preset battery SOC value, and a maximum braking force of the motor.

[0078] To ensure accurate selection of the subsequent braking method, it is also necessary to obtain the battery SOC value, the preset battery SOC value, and the maximum braking force of the motor. The battery SOC value reflects the current charge in the power battery in real time. The preset battery SOC value needs to be set in advance. The specific value can be selected based on actual design requirements and is not specifically limited in the embodiments of the present invention. The maximum braking force of the motor reflects the maximum deceleration capability that the motor can provide in regenerative braking mode, which facilitates the subsequent appropriate selection of the braking method.

[0079] S305 , determining a braking mode according to the battery SOC value, a preset battery SOC value, a maximum braking force of the electric motor, and a second vehicle braking force requirement value, so as to perform braking control on the range-extended vehicle.

[0080] Among them, the braking mode is selected in combination with the battery SOC value, the preset battery SOC value, the maximum braking force of the electric motor and the second vehicle braking force requirement value to ensure precise braking of the current extended-range vehicle and ensure braking safety.

[0081] The embodiment of the present invention obtains a vehicle pedal pedal value; obtains a first preset vehicle pedal pedal value and a second preset vehicle pedal pedal value, wherein the first preset vehicle pedal pedal value is less than the second preset vehicle pedal pedal value; when the vehicle pedal pedal value is between the first preset vehicle pedal pedal value and the second preset vehicle pedal pedal value, obtains a second vehicle braking force demand value; obtains a battery SOC value, a preset battery SOC value, and a maximum braking force of the electric motor; and determines a braking mode based on the battery SOC value, the preset battery SOC value, the maximum braking force of the electric motor, and the second vehicle braking force demand value to control the braking of the extended-range vehicle. Different braking modes are matched to the braking demand to ensure reliable braking of the extended-range vehicle and improve the braking effect of the entire vehicle.

[0082] Optional, Figure 5 A flowchart of a fourth method for controlling the braking of an extended-range vehicle according to an embodiment of the present invention is shown in FIG. Figure 5 As shown, the braking modes include electric motor braking, engine cylinder braking, engine cylinder and electric motor hybrid braking, and engine cylinder and hydraulic hybrid braking. The braking control method of the range-extended vehicle includes:

[0083] S401, acquire a vehicle pedal depression value.

[0084] S402, acquire a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0085] S403, when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, acquire a second whole vehicle braking force demand value; wherein the whole vehicle braking force demand value comprises a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value.

[0086] S404, acquire a battery SOC value, a preset battery SOC value, and acquire a maximum motor braking force.

[0087] S405, determine whether the battery SOC value is greater than the preset battery SOC value; if yes, execute step S407; if no, execute step S406.

[0088] S406, determine an engine cylinder and hydraulic hybrid braking mode to brake control the extended-range vehicle.

[0089] When the battery SOC value in the power battery is greater than the preset battery SOC value, it is considered that the power in the power battery is more, and the motor braking mode can be introduced to brake the extended-range vehicle. When the battery SOC value in the power battery is less than or equal to the preset battery SOC value, it is considered that the power in the power battery is less, and the engine cylinder and hydraulic hybrid braking mode can be used to brake the extended-range vehicle to ensure the braking effect.

[0090] S407, determine whether the maximum motor braking force is greater than the second whole vehicle braking force demand value; if yes, execute step S408; if no, execute step S409.

[0091] S408, determine the motor braking mode to brake control the extended-range vehicle.

[0092] S409, determine the engine cylinder and motor hybrid braking mode to brake control the extended-range vehicle.

[0093] When the electric motor braking mode can be introduced, it can be further judged whether the electric motor braking mode can be used alone or the engine in-cylinder and electric motor hybrid braking mode is used. Specifically, the maximum electric motor braking force of the electric motor is compared with the second vehicle braking force demand value. When the maximum electric motor braking force of the electric motor is greater than the second vehicle braking force demand value, the electric motor braking mode can be used alone to brake the extended-range vehicle; when the maximum electric motor braking force of the electric motor is less than or equal to the second vehicle braking force demand value, the engine in-cylinder and electric motor hybrid braking mode can be used to brake the extended-range vehicle.

[0094] The embodiment of the application obtains a vehicle pedal depression value, obtains a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value, obtains a second vehicle braking force demand value when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, obtains a battery SOC value, a preset battery SOC value, and a maximum electric motor braking force, compares the battery SOC value with the preset battery SOC value, and compares the maximum electric motor braking force with the second vehicle braking force demand value to determine the electric motor braking mode or the engine in-cylinder and electric motor hybrid braking mode to brake the extended-range vehicle. Different braking modes are combined according to braking demands to ensure reliable braking of the extended-range vehicle and improve the braking effect of the vehicle.

[0095] Optionally, Figure 6 A flowchart of a fifth braking control method of an extended-range vehicle is shown in FIG. 5, which includes the following steps. Figure 6

[0096] S501, obtaining a vehicle pedal depression value.

[0097] S502, obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0098] S503, obtaining a second vehicle braking force demand when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value; wherein the vehicle braking force demand value includes a first vehicle braking force demand value, a second vehicle braking force demand value, and a third vehicle braking force demand value, the first vehicle braking force demand value is greater than the second vehicle braking force demand value, and the second vehicle braking force demand value is greater than the third vehicle braking force demand value.

[0099] S504, obtaining a battery SOC value, a preset battery SOC value, and a maximum electric motor braking force.

[0100] ​S505, determining whether the battery SOC value is greater than the preset battery SOC value; if yes, executing step S507; if no, executing step S506.

[0101] S506, determining the engine cylinder and hydraulic hybrid braking mode to brake control the extended-range vehicle.

[0102] S507, determining whether the maximum motor braking force is greater than the second vehicle braking force demand value; if yes, executing step S508; if no, executing step S509.

[0103] S508, determining the motor braking mode to brake control the extended-range vehicle.

[0104] S509, determining the engine cylinder and motor hybrid braking mode to brake control the extended-range vehicle.

[0105] S510, obtaining the third vehicle braking force demand value when the vehicle pedal depression value is less than the first preset vehicle pedal depression value.

[0106] When the vehicle pedal depression value is less than the first preset vehicle pedal depression value, the vehicle control unit obtains the third vehicle braking force demand value corresponding to the current braking demand according to the vehicle pedal depression value.

[0107] S511, obtaining the battery SOC value and the preset battery SOC value.

[0108] S512, determining the braking mode according to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value.

[0109] In order to ensure the accurate selection of the subsequent braking mode, the battery SOC value and the preset battery SOC value are also needed to be obtained, and the battery SOC value reflects the current power battery capacity in real time. The preset battery SOC value needs to be set in advance, and the specific value can be selected according to the actual design requirements, which is not limited in the embodiment of the application. In order to select the braking mode corresponding to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value, the accurate braking of the current extended-range vehicle is ensured, and the safety of the braking is ensured.

[0110] The embodiment of the present application obtains a vehicle pedal depression value; obtains a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is smaller than the second preset vehicle pedal depression value; obtains a third whole vehicle braking force demand value when the vehicle pedal depression value is smaller than the first preset vehicle pedal depression value; obtains a battery SOC value, a preset battery SOC value and a third whole vehicle braking force demand value to determine a braking mode for braking control of the range extending vehicle. Different braking modes are combined according to braking demands to ensure reliable braking of the range extending vehicle and improve whole vehicle braking effect.

[0111] Optionally, Figure 7 A flowchart of a sixth braking control method of a range extending vehicle provided by the embodiment of the present application is shown in Figure 7 The braking mode includes an electric motor braking mode, an engine cylinder braking mode, an engine cylinder and electric motor hybrid braking mode and an engine cylinder and hydraulic hybrid braking mode; the braking control method of the range extending vehicle includes:

[0112] S601, obtaining a vehicle pedal depression value.

[0113] S602, obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is smaller than the second preset vehicle pedal depression value.

[0114] S603, obtaining a second whole vehicle braking force demand when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value; wherein the whole vehicle braking force demand value includes a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value.

[0115] S604, obtaining a battery SOC value, a preset battery SOC value and an electric motor maximum braking force.

[0116] S605, determining whether the battery SOC value is greater than the preset battery SOC value; if yes, executing step S607; if no, executing step S606.

[0117] S606, determining an engine cylinder and hydraulic hybrid braking mode for braking control of the range extending vehicle.

[0118] S607, determining whether the electric motor maximum braking force is greater than the second whole vehicle braking force demand value; if yes, executing step S608; if no, executing step S609.

[0119] S608, determining an electric motor braking mode for braking control of the range extending vehicle.

[0120] S609, determining the engine cylinder and motor hybrid braking mode to brake the extended-range vehicle.

[0121] S610, when the vehicle pedal depression value is less than the first preset vehicle pedal depression value, obtaining a third whole vehicle braking force demand value.

[0122] S611, obtaining a battery SOC value and a preset battery SOC value.

[0123] S612, according to the third whole vehicle braking force demand value, determining whether the battery SOC value is greater than the preset battery SOC value; if yes, executing step S613; if no, executing step S614.

[0124] S613, determining the motor braking mode.

[0125] S614, determining the engine cylinder braking mode.

[0126] At this time, the whole layer braking force demand value is the third whole vehicle braking force demand value, when the battery SOC value in the power battery is greater than the preset battery SOC value, at this time, it is considered that the power in the power battery is more, the power battery can be driven to drive the motor, and the motor braking mode is used to brake the extended-range vehicle. When the battery SOC value in the power battery is less than or equal to the preset battery SOC value, at this time, it is considered that the power in the power battery is less, and the engine cylinder braking mode can be used to brake the extended-range vehicle to ensure the braking effect.

[0127] The embodiment of the application obtains the vehicle pedal depression value, obtains the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value, when the vehicle pedal depression value is less than the first preset vehicle pedal depression value, obtains the third whole vehicle braking force demand value, and according to the third whole vehicle braking force demand value, compares the battery SOC value with the preset battery SOC value to determine the motor braking mode or the engine cylinder braking mode to brake the extended-range vehicle. Different braking modes are combined according to the braking demand to ensure the reliable braking of the extended-range vehicle and improve the whole vehicle braking effect.

[0128] Optionally, Figure 8 The seventh braking control method for the extended-range vehicle provided by the embodiment of the application is shown in the flowchart as shown in Figure 8 The braking mode includes the motor braking mode, the engine cylinder braking mode, the engine cylinder and motor hybrid braking mode, and the engine cylinder and hydraulic hybrid braking mode; the braking control method for the extended-range vehicle includes:

[0129] S701, obtaining a vehicle pedal depression value.

[0130] S702, obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value.

[0131] S703, obtaining a second whole vehicle braking force demand when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value; wherein the whole vehicle braking force demand value comprises a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value.

[0132] S704, obtaining a battery SOC value, a preset battery SOC value, and obtaining a maximum motor braking force.

[0133] S705, determining whether the battery SOC value is greater than the preset battery SOC value; if yes, executing step S707; if no, executing step S706.

[0134] S706, determining an engine in-cylinder and hydraulic hybrid braking mode to brake control the range-extended vehicle.

[0135] S707, determining whether the maximum motor braking force is greater than the second whole vehicle braking force demand value; if yes, executing step S708; if no, executing step S709.

[0136] S708, determining a motor braking mode to brake control the range-extended vehicle.

[0137] S709, determining an engine in-cylinder and motor hybrid braking mode to brake control the range-extended vehicle.

[0138] S710, obtaining the third whole vehicle braking force demand value when the vehicle pedal depression value is less than the first preset vehicle pedal depression value.

[0139] S711, obtaining the battery SOC value and the preset battery SOC value.

[0140] S712, determining whether the battery SOC value is greater than the preset battery SOC value according to the third whole vehicle braking force demand value; if yes, executing step S713; if no, executing step S714.

[0141] S713, determining the motor braking mode.

[0142] S714, determining the engine in-cylinder braking mode.

[0143] S715, obtaining the first whole vehicle braking force demand value when the vehicle pedal depression value is greater than the second preset vehicle pedal depression value.

[0144] When the vehicle pedal depression value is greater than the second preset vehicle pedal depression value, the vehicle control unit obtains the brake demand corresponding to the vehicle pedal depression value at this time as a first vehicle brake demand value in the vehicle brake demand value, the first vehicle brake demand value corresponds to a greater brake demand, and the instantaneous demand brake of the vehicle is greater.

[0145] S716, determining the engine cylinder and hydraulic hybrid braking mode according to the first vehicle brake demand value.

[0146] When the brake demand at this time is the first vehicle brake demand value, the engine cylinder and hydraulic hybrid braking mode needs to be used to brake the range extending vehicle with the maximum brake force to ensure the braking effect.

[0147] The embodiment of the application obtains the vehicle pedal depression value, obtains the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value, obtains the first vehicle brake demand value when the vehicle pedal depression value is greater than the second preset vehicle pedal depression value, and determines the engine cylinder and hydraulic hybrid braking mode according to the first vehicle brake demand value to brake and control the range extending vehicle. Different braking modes are combined according to the brake demand to ensure the reliable braking of the range extending vehicle and improve the vehicle braking effect.

[0148] Based on the same inventive concept, the embodiment of the application also provides a brake control device for a range extending vehicle, Figure 9 The structure diagram of the brake control device for the range extending vehicle provided by the embodiment of the application is shown in the figure, Figure 9 The brake control device for the range extending vehicle executes the brake control method for the range extending vehicle in any of the above embodiments, and can be realized by software and / or hardware. The brake control device for the range extending vehicle includes:

[0149] The vehicle pedal depression value acquisition module 101 is configured to obtain the vehicle pedal depression value.

[0150] The vehicle brake demand value acquisition module 102 is configured to obtain the vehicle brake demand value according to the vehicle pedal depression value, wherein the vehicle brake demand value includes a first vehicle brake demand value, a second vehicle brake demand value and a third vehicle brake demand value, the first vehicle brake demand value is greater than the second vehicle brake demand value, and the second vehicle brake demand value is greater than the third vehicle brake demand value.

[0151] The brake mode determination module 103 is configured to determine the brake mode according to the vehicle brake demand value to brake and control the range extending vehicle.

[0152] It should be noted that the brake control device of the extended-range vehicle provided by the embodiment includes the technical features of any of the brake control methods of the extended-range vehicle provided by the embodiments of the application, and can achieve the same or corresponding beneficial effects of the brake control methods of the extended-range vehicle provided by any of the embodiments of the application. For the same parts, refer to the description of the brake control methods of the extended-range vehicle provided by the embodiments of the application, which will not be repeated here.

[0153] Based on the same inventive concept, the embodiments of the application also provide an extended-range mine vehicle, which comprises an engine, a generator, a power battery and a controller, the controller being connected with the engine, the generator and the power battery respectively; the controller is configured to execute the brake control method of the extended-range vehicle according to any of the above embodiments. Therefore, the extended-range mine vehicle provided by the embodiments of the application includes the technical features of the brake control method of the extended-range vehicle provided by any of the embodiments of the application, and can achieve the beneficial effects of the brake control method of the extended-range vehicle provided by any of the embodiments of the application. For the same parts, refer to the description of the brake control method of the extended-range vehicle provided by the embodiments of the application, which will not be repeated here.

[0154] The above detailed description does not constitute a limitation on the protection scope of the application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A brake control method of a range extending vehicle, characterized by, The method comprises: obtaining a vehicle pedal depression value; obtaining a whole vehicle braking force demand value according to the vehicle pedal depression value, wherein the whole vehicle braking force demand value comprises a first whole vehicle braking force demand value, a second whole vehicle braking force demand value and a third whole vehicle braking force demand value, the first whole vehicle braking force demand value is greater than the second whole vehicle braking force demand value, and the second whole vehicle braking force demand value is greater than the third whole vehicle braking force demand value; determining a braking mode according to the whole vehicle braking force demand value to perform braking control on the range extending vehicle; before obtaining the whole vehicle braking force demand value according to the vehicle pedal depression information, the method further comprises: obtaining a first preset vehicle pedal depression value and a second preset vehicle pedal depression value, wherein the first preset vehicle pedal depression value is less than the second preset vehicle pedal depression value; obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value comprises: obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value; obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value comprises: when the vehicle pedal depression value is between the first preset vehicle pedal depression value and the second preset vehicle pedal depression value, obtaining the second whole vehicle braking force demand value; determining the braking mode according to the whole vehicle braking force demand value comprises: obtaining a battery SOC value, a preset battery SOC value and a maximum motor braking force; determining the braking mode according to the battery SOC value, the preset battery SOC value, the maximum motor braking force and the second whole vehicle braking force demand value; the braking mode comprises a motor braking mode, an engine in-cylinder braking mode, an engine in-cylinder and motor hybrid braking mode and an engine in-cylinder and hydraulic hybrid braking mode; determining the braking mode according to the battery SOC value, the preset battery SOC value, the maximum motor braking force and the second whole vehicle braking force demand value comprises: when the battery SOC value is greater than the preset battery SOC value and the maximum motor braking force is greater than the second whole vehicle braking force demand value, determining the motor braking mode; when the battery SOC value is greater than the preset battery SOC value and the maximum motor braking force is less than or equal to the second whole vehicle braking force demand value, determining the engine in-cylinder and motor hybrid braking mode; when the battery SOC value is less than or equal to the preset battery SOC value, determining the engine in-cylinder and hydraulic hybrid braking mode.

2. The brake control method of the range extending vehicle according to claim 1, characterized by, obtaining the whole vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value comprises: when the vehicle pedal depression value is less than the first preset vehicle pedal depression value, obtaining the third whole vehicle braking force demand value; determining the braking mode according to the whole vehicle braking force demand value comprises: obtaining a battery SOC value and a preset battery SOC value; Determine the braking mode according to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value.

3. The brake control method of the extended-range vehicle according to claim 2, wherein Determine the braking mode according to the battery SOC value, the preset battery SOC value and the third vehicle braking force demand value includes: Determine the motor braking mode according to the third vehicle braking force demand value and when the battery SOC value is greater than the preset battery SOC value; Determine the engine in-cylinder braking mode according to the third vehicle braking force demand value and when the battery SOC value is less than or equal to the preset battery SOC value.

4. The brake control method of the range extending vehicle according to claim 1, characterized by, Obtaining the vehicle braking force demand value according to the vehicle pedal depression value, the first preset vehicle pedal depression value and the second preset vehicle pedal depression value includes: Obtain the first vehicle braking force demand value when the vehicle pedal depression value is greater than the second preset vehicle pedal depression value; Determine the braking mode according to the vehicle braking force demand value includes: Determine the engine in-cylinder and hydraulic hybrid braking mode according to the first vehicle braking force demand value.

5. A brake control device of a range extending vehicle characterized by comprising: The brake control method of the extended-range vehicle according to any one of claims 1-4 is executed by a brake control device of the extended-range vehicle, the brake control device of the extended-range vehicle includes: A vehicle pedal depression value obtaining module for obtaining a vehicle pedal depression value; A vehicle braking force demand value obtaining module for obtaining a vehicle braking force demand value according to the vehicle pedal depression value, wherein the vehicle braking force demand value includes a first vehicle braking force demand value, a second vehicle braking force demand value and a third vehicle braking force demand value, the first vehicle braking force demand value is greater than the second vehicle braking force demand value, and the second vehicle braking force demand value is greater than the third vehicle braking force demand value; A braking mode determining module for determining a braking mode according to the vehicle braking force demand value to brake the extended-range vehicle.

6. A range-extended mine car, characterized by, The extended-range vehicle includes an engine, a generator, a power battery and a controller, the controller is connected with the engine, the generator and the power battery respectively; The controller is used to execute the brake control method of the extended-range vehicle according to any one of claims 1-4.

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