CN109774701B - Parallel hybrid power switching method and computer readable storage medium - Google Patents
Parallel hybrid power switching method and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a parallel hybrid power switching method and a computer readable storage medium, wherein the method comprises the following steps: acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value; generating an electric oil switching line; generating an oil-electricity switching line; determining a hybrid power region; the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area. The invention can effectively adapt to external geographical conditions and can improve the utilization rate of fuel oil and the utilization rate of a power supply.
Description
Technical Field
The present invention relates to the field of power switching technologies, and in particular, to a parallel hybrid power switching method and a computer-readable storage medium.
Background
At present, based on a hybrid vehicle with a motor and an engine connected in parallel, the motor is driven by electric energy of a storage battery to drive the vehicle independently when the vehicle starts, and the engine for burning fuel is started to drive the vehicle independently or jointly after a certain vehicle speed is reached. Therefore, the fuel engine can be prevented from operating in a low-rotating-speed high-torque fuel-consumption interval when starting, the engine is started to drive after the speed is increased to a certain speed through the motor drive, the engine can operate in a relatively reasonable economic interval of rotating speed when being started, and the utilization efficiency of fuel oil of the vehicle is improved.
However, the conventional hybrid vehicle basically performs a static switch from electric power to fuel power, for example, when the vehicle speed reaches a certain fixed threshold value, the power switch from the motor to the engine is performed. Such an approach does not effectively accommodate external geographical conditions.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a parallel hybrid power switching method and a computer readable storage medium are provided, which can effectively adapt to external geographical conditions and can improve fuel utilization and power utilization.
In order to solve the technical problems, the invention adopts the technical scheme that: a parallel hybrid switching method, comprising:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and preset change speed and change gradient;
the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area.
The invention also relates to a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and preset change speed and change gradient;
the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area.
The invention has the beneficial effects that: the method comprises the steps of obtaining an electric-oil switching line for switching from electric power to fuel power during speed acceleration, obtaining a fuel-electric switching line for switching from the fuel power to the electric power during vehicle deceleration and defining a power hybrid driving area in an intersection area of the switching lines by analyzing the minimum vehicle speed at which an engine can operate, the maximum vehicle speed at which a motor can operate, the maximum gradient value and the minimum gradient value, continuously collecting the current vehicle speed and the current gradient angle of the vehicle during vehicle running, and searching whether the current angle and speed corresponding states reach switching conditions or not according to the electric-oil switching line, the fuel-electric switching line and the hybrid power area, thereby executing more effective switching from the electric power to the fuel power. The invention can effectively adapt to external geographical conditions and can improve the utilization rate of fuel oil and the utilization rate of a power supply.
Drawings
FIG. 1 is a flow chart of a parallel hybrid switching method of the present invention;
FIG. 2 is a flowchart of a method according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of an electric oil switching line, an oil electric switching line, and a hybrid region according to a first embodiment of the present invention.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The most key concept of the invention is as follows: by formulating a dynamic switching line and a hybrid power area, switching control is dynamically performed in combination with the speed of the current vehicle and the angle of the slope at which the current vehicle is located.
Referring to fig. 1, a parallel hybrid power switching method includes:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and preset change speed and change gradient;
the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area.
From the above description, the beneficial effects of the present invention are: the method can effectively adapt to external geographical conditions, and can improve the utilization rate of fuel oil and the utilization rate of a power supply.
Further, the "acquiring the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the motor can operate, and the maximum gradient value and the minimum gradient value" is specifically:
acquiring the minimum vehicle speed at which the engine can run according to the characteristics of the vehicle type of the engine;
acquiring the maximum speed of the motor which can operate according to the rated vehicle speed characteristic of the motor;
and acquiring a maximum gradient value and a minimum gradient value according to the road design specification.
Further, the "generating an electric-oil switching line according to the minimum vehicle speed, the maximum gradient value, and the minimum gradient value" specifically includes:
establishing a two-dimensional rectangular coordinate system by taking the speed as an abscissa and the gradient as an ordinate;
obtaining a first point according to the minimum vehicle speed and the minimum gradient value;
obtaining a second point according to the maximum vehicle speed and the maximum gradient value;
and generating an electric oil switching line according to the first point and the second point.
Further, the "generating the oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and the preset speed distance" specifically includes:
obtaining a third point according to the minimum vehicle speed, the minimum gradient value and a preset speed distance;
obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance;
and generating the oil-electricity switching wire according to the third point and the fourth point.
Further, the step of "acquiring the current vehicle speed and the current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current vehicle speed, the current gradient value, the electric-oil switching line and the hybrid power region" specifically comprises the steps of:
collecting the current speed and the current gradient value of the vehicle;
if the current vehicle speed and the current gradient value are in the hybrid power area, hybrid driving is adopted;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are driven by a motor at present, calculating to obtain a first speed according to the current gradient value and the electric oil switching line;
if the current speed is higher than the first speed, the motor is switched to be driven, otherwise, the motor is kept to be driven;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are currently driven by an engine, calculating to obtain a second speed according to the current gradient value and the oil-electricity switching line;
if the current vehicle speed is less than the second speed, the vehicle is switched to be driven by the motor, and if not, the engine is kept to be driven.
The invention also relates to a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and preset change speed and change gradient;
the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area.
Further, the "acquiring the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the motor can operate, and the maximum gradient value and the minimum gradient value" is specifically:
acquiring the minimum vehicle speed at which the engine can run according to the characteristics of the vehicle type of the engine;
acquiring the maximum speed of the motor which can operate according to the rated vehicle speed characteristic of the motor;
and acquiring a maximum gradient value and a minimum gradient value according to the road design specification.
Further, the "generating an electric-oil switching line according to the minimum vehicle speed, the maximum gradient value, and the minimum gradient value" specifically includes:
establishing a two-dimensional rectangular coordinate system by taking the speed as an abscissa and the gradient as an ordinate;
obtaining a first point according to the minimum vehicle speed and the minimum gradient value;
obtaining a second point according to the maximum vehicle speed and the maximum gradient value;
and generating an electric oil switching line according to the first point and the second point.
Further, the "generating the oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and the preset speed distance" specifically includes:
obtaining a third point according to the minimum vehicle speed, the minimum gradient value and a preset speed distance;
obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance;
and generating the oil-electricity switching wire according to the third point and the fourth point.
Further, the step of "acquiring the current vehicle speed and the current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current vehicle speed, the current gradient value, the electric-oil switching line and the hybrid power region" specifically comprises the steps of:
collecting the current speed and the current gradient value of the vehicle;
if the current vehicle speed and the current gradient value are in the hybrid power area, hybrid driving is adopted;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are driven by a motor at present, calculating to obtain a first speed according to the current gradient value and the electric oil switching line;
if the current speed is higher than the first speed, the motor is switched to be driven, otherwise, the motor is kept to be driven;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are currently driven by an engine, calculating to obtain a second speed according to the current gradient value and the oil-electricity switching line;
if the current vehicle speed is less than the second speed, the vehicle is switched to be driven by the motor, and if not, the engine is kept to be driven.
Example one
Referring to fig. 2-3, a first embodiment of the present invention is: a parallel hybrid power switching method can be applied to a hybrid vehicle based on parallel connection of a motor and an engine, as shown in FIG. 2, and comprises the following steps:
s1: the minimum vehicle speed at which the engine can be operated, the maximum vehicle speed at which the motor can be operated, and the maximum gradient value and the minimum gradient value are obtained. Specifically, since starting the engine below the minimum vehicle speed causes the engine to stall due to an excessively small transmission coefficient, the minimum vehicle speed at which the engine can operate is acquired according to the engine characteristics of the vehicle type; because the motor is started at a speed higher than the maximum speed, the risk of coil burnout is caused by the fact that the motor runs too fast, and therefore the maximum speed at which the motor can operate is obtained according to the rated vehicle speed characteristic of the motor; and obtaining a maximum gradient value and a minimum gradient value according to the road design specification. Further, according to the road design regulations in China, in urban roads and expressways, the maximum allowable gradient is 5 degrees, so the maximum gradient value Smax is 5 degrees, and the minimum gradient value Smin is-5 degrees (degrees are negative indicating downhill).
S2: and generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value. Specifically, a two-dimensional rectangular coordinate system is established by taking the speed as an abscissa and the gradient as an ordinate; obtaining a first point according to the minimum vehicle speed and the minimum gradient value; obtaining a second point according to the maximum vehicle speed and the maximum gradient value; and generating an electric oil switching line according to the first point and the second point.
As shown in fig. 3, the engine-operable minimum vehicle speed Vmin and the minimum gradient value Smin are paired into a first point (Vmin, Smin), the motor-operable maximum vehicle speed Vmax and the maximum gradient value Smax are paired into a second point (Vmax, Smax), and the points (Vmin, Smin) and (Vmax, Smax) are connected to generate an electric-oil switching line in a two-dimensional space of the vehicle speed-gradient angle.
S3: and generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance. In order to prevent the repeated and frequent switching between the electric power and the oil power caused by the fluctuation of the vehicle in the right running state near the switching line, which leads to the frequent starting and stopping of the two power systems, an independent oil-electric switching line needs to be established and is separated from the electric-oil switching line by a certain distance, so that the frequent switching is avoided. Specifically, a third point is obtained according to the minimum vehicle speed, the minimum gradient value and a preset speed distance; obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance; and generating the oil-electricity switching wire according to the third point and the fourth point.
As shown in fig. 3, a velocity distance Δ is taken, and a third point (Vmin + Δ, Smin) and a fourth point (Vmax- Δ, Smax) are obtained and connected to form an oil-electric switching line. Wherein, the delta is generally required to be more than 2km/h and less than 5 km/h.
S4: and determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and the preset change speed and change gradient. Since the electric-oil switching wire and the oil-electric switching wire have intersecting portions. The lines are very close at the intersection, which easily causes frequent switching between the two systems. Therefore, in this region, both systems should operate simultaneously to drive the vehicle. As shown in fig. 3, the center point gradient of the intersection is 0, and the speed is Vmid ═ Vmin + Vmax)/2. And presetting a change speed delta and a change gradient delta theta, wherein the intersection region is a rectangular region formed by the interval ranges of gradients of [ -delta theta, delta theta ], and speeds of [ Vmid-delta, Vmid + delta ], namely the hybrid region. Wherein the change speed delta is generally required to be less than 5km/h, and the change gradient delta theta is generally required to be less than 0.5 degree.
S5: collecting the current speed and the current gradient value of the vehicle; and acquiring signals in real time during the running process of the vehicle, wherein the signals comprise a gradient value theta of the current gradient of the vehicle acquired from the inclination angle sensor and a current vehicle speed V acquired from a vehicle speed instrument. The current gradient value θ is 5 degrees at maximum and-5 degrees at minimum, that is, if the angle θ is greater than 5 degrees, θ is 5, and if the angle θ is less than-5 degrees, θ is-5.
S6: and judging whether the current vehicle speed and the current gradient value are both in the hybrid power region, namely whether theta belongs to the range of minus delta theta and V belongs to the range of Vmid-delta and Vmid + delta, if so, executing the step S7, and otherwise, executing the step S8.
S7: hybrid drive is adopted, that is, if the vehicle is currently in electric drive, the engine common drive is simultaneously turned on, and if the vehicle is currently in engine drive, the electric motor common drive is simultaneously turned on.
S8: and judging whether the vehicle is currently driven by the motor, if so, executing step S9, otherwise, indicating that the vehicle is currently driven by the engine, and executing step S13.
S9: and calculating to obtain a first speed according to the current slope value and the electric-oil switching line, namely calculating a corresponding first speed V1 on the electric-oil switching line according to the current slope angle theta.
S10: and judging whether the current vehicle speed is greater than the first speed, namely whether V is greater than V1, if so, executing step S11, and if not, executing step S12.
S11: switching to engine drive.
S12: keeping the motor driven.
S13: and calculating to obtain a second speed according to the current slope value and the oil-electricity switching line, namely calculating a corresponding second speed V2 on the oil-electricity switching line according to the current slope angle theta.
S14: and judging whether the current vehicle speed is less than the second speed, namely whether V < V2 is true, if so, executing step S15, and if not, executing step S16.
S15: switching to motor drive.
S16: the engine is kept driven.
Further, after steps S11, S12, S15, and S16, execution returns to step S5.
Due to the characteristics of the motor, when the motor is in a light load state, the utilization efficiency of the power supply is low, when the vehicle is in a downhill road section, the torque required for starting is small, the motor is in the light load state, at the moment, the motor is switched to the fuel engine drive as soon as possible, the low-efficiency working time of the motor is reduced, and due to the fact that the torque required for the downhill is small, the engine is not enabled to work in an oil-consuming interval with low rotating speed and high torque even if the motor is switched to the engine drive earlier, and therefore the downhill road section is switched earlier, and the energy utilization efficiency can be better. Similarly, on the uphill road section of the vehicle, because the utilization rate of the power supply is high when the motor is in a heavy load state, the switching time is delayed, and the engine is switched to be driven at a higher speed, so that the utilization rate of the power supply can be improved.
The embodiment provides a method for optimally controlling the timing of switching from motor drive to engine drive of a gasoline-electric hybrid vehicle at the beginning of a step by using a tilt angle sensor. Aiming at the design specifications of the highest motor driving speed per hour and the road gradient, a switching line for switching the motor to the engine during speed acceleration and a switching line for switching the engine to the motor during speed reduction are generated on a two-dimensional space of a vehicle speed-slope angle. The switching line forms a two-parameter power switching diagram combining sensor angle and vehicle speed. In the running process of the vehicle, the angle and the speed of the sensor are continuously acquired, and whether the switching condition is met or not is searched from the two-parameter switching graph, so that more effective switching from electric power to fuel power is executed.
Example two
The present embodiment is a computer-readable storage medium corresponding to the above-mentioned embodiments, on which a computer program is stored, which when executed by a processor, performs the steps of:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed and preset change speed and change gradient;
the method comprises the steps of collecting the current speed and the current gradient value of a vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, an electric-oil switching line, an oil-electric switching line and a hybrid power area.
Further, the "acquiring the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the motor can operate, and the maximum gradient value and the minimum gradient value" is specifically:
acquiring the minimum vehicle speed at which the engine can run according to the characteristics of the vehicle type of the engine;
acquiring the maximum speed of the motor which can operate according to the rated vehicle speed characteristic of the motor;
and acquiring a maximum gradient value and a minimum gradient value according to the road design specification.
Further, the "generating an electric-oil switching line according to the minimum vehicle speed, the maximum gradient value, and the minimum gradient value" specifically includes:
establishing a two-dimensional rectangular coordinate system by taking the speed as an abscissa and the gradient as an ordinate;
obtaining a first point according to the minimum vehicle speed and the minimum gradient value;
obtaining a second point according to the maximum vehicle speed and the maximum gradient value;
and generating an electric oil switching line according to the first point and the second point.
Further, the "generating the oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and the preset speed distance" specifically includes:
obtaining a third point according to the minimum vehicle speed, the minimum gradient value and a preset speed distance;
obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance;
and generating the oil-electricity switching wire according to the third point and the fourth point.
Further, the step of "acquiring the current vehicle speed and the current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current vehicle speed, the current gradient value, the electric-oil switching line and the hybrid power region" specifically comprises the steps of:
collecting the current speed and the current gradient value of the vehicle;
if the current vehicle speed and the current gradient value are in the hybrid power area, hybrid driving is adopted;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are driven by a motor at present, calculating to obtain a first speed according to the current gradient value and the electric oil switching line;
if the current speed is higher than the first speed, the motor is switched to be driven, otherwise, the motor is kept to be driven;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are currently driven by an engine, calculating to obtain a second speed according to the current gradient value and the oil-electricity switching line;
if the current vehicle speed is less than the second speed, the vehicle is switched to be driven by the motor, and if not, the engine is kept to be driven.
In summary, according to the parallel hybrid switching method and the computer-readable storage medium provided by the invention, by analyzing the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the motor can operate, the maximum slope value and the minimum slope value, an electric-oil switching line for switching from electric power to fuel power when the vehicle is accelerated, an oil-electric switching line for switching from fuel power to electric power when the vehicle is decelerated, and an intersection area of the switching lines, a hybrid driving area is defined, then the current vehicle speed and the current slope angle of the vehicle are continuously acquired during the vehicle driving process, and whether the state corresponding to the current angle and speed reaches the switching condition is searched according to the electric-oil switching line, the oil-electric switching line and the hybrid area, so that more effective switching from electric power to fuel power is performed. The invention can effectively adapt to external geographical conditions and can improve the utilization rate of fuel oil and the utilization rate of a power supply.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (6)
1. A parallel hybrid switching method, comprising:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed, and the preset change speed and change gradient, wherein the hybrid power area is a rectangular area formed by an interval range of [ Vmid-delta, Vmid + delta ] with gradient of [ delta theta, delta theta ], speed of [ Vmid-delta, Vmid + delta ], delta theta is the preset change gradient, Vmid is the average value of the minimum vehicle speed and the maximum vehicle speed, and delta is the preset change speed;
acquiring the current speed and the current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, the electric-oil switching line, the oil-electric switching line and the hybrid power area;
the step of generating the electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value specifically comprises the following steps:
establishing a two-dimensional rectangular coordinate system by taking the speed as an abscissa and the gradient as an ordinate;
obtaining a first point according to the minimum vehicle speed and the minimum gradient value;
obtaining a second point according to the maximum vehicle speed and the maximum gradient value;
generating an electric oil switching line according to the first point and the second point;
the generating of the oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and the preset speed distance specifically comprises the following steps:
obtaining a third point according to the minimum vehicle speed, the minimum gradient value and a preset speed distance;
obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance;
and generating the oil-electricity switching wire according to the third point and the fourth point.
2. A parallel hybrid switching method according to claim 1, wherein the "obtaining the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the electric machine can operate, and the maximum and minimum slope values" is specifically:
acquiring the minimum vehicle speed at which the engine can run according to the characteristics of the vehicle type of the engine;
acquiring the maximum speed of the motor which can run according to the rated rotating speed characteristic of the motor;
and acquiring a maximum gradient value and a minimum gradient value according to the road design specification.
3. A parallel hybrid switching method according to claim 1, wherein the "acquiring a current vehicle speed and a current gradient value of a vehicle, and determining a power driving mode of the vehicle according to the current vehicle speed, the current gradient value, the electric-oil switching line, the oil-electric switching line, and the hybrid region" is specifically:
collecting the current speed and the current gradient value of the vehicle;
if the current vehicle speed and the current gradient value are in the hybrid power area, hybrid driving is adopted;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are driven by a motor at present, calculating to obtain a first speed according to the current gradient value and the electric oil switching line;
if the current speed is higher than the first speed, the motor is switched to be driven, otherwise, the motor is kept to be driven;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are currently driven by an engine, calculating to obtain a second speed according to the current gradient value and the oil-electricity switching line;
if the current vehicle speed is less than the second speed, the vehicle is switched to be driven by the motor, and if not, the engine is kept to be driven.
4. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:
acquiring a minimum vehicle speed at which the engine can operate, a maximum vehicle speed at which the motor can operate, a maximum gradient value and a minimum gradient value;
generating an electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value;
generating an oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and a preset speed distance;
determining a hybrid power area according to the minimum vehicle speed, the maximum vehicle speed, and the preset change speed and change gradient, wherein the hybrid power area is a rectangular area formed by an interval range of [ Vmid-delta, Vmid + delta ] with gradient of [ delta theta, delta theta ], speed of [ Vmid-delta, Vmid + delta ], delta theta is the preset change gradient, Vmid is the average value of the minimum vehicle speed and the maximum vehicle speed, and delta is the preset change speed;
acquiring the current speed and the current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current speed, the current gradient value, the electric-oil switching line, the oil-electric switching line and the hybrid power area;
the step of generating the electric oil switching line according to the minimum vehicle speed, the maximum gradient value and the minimum gradient value specifically comprises the following steps:
establishing a two-dimensional rectangular coordinate system by taking the speed as an abscissa and the gradient as an ordinate;
obtaining a first point according to the minimum vehicle speed and the minimum gradient value;
obtaining a second point according to the maximum vehicle speed and the maximum gradient value;
generating an electric oil switching line according to the first point and the second point;
the generating of the oil-electricity switching line according to the minimum vehicle speed, the maximum gradient value, the minimum gradient value and the preset speed distance specifically comprises the following steps:
obtaining a third point according to the minimum vehicle speed, the minimum gradient value and a preset speed distance;
obtaining a fourth point according to the maximum vehicle speed, the maximum gradient value and a preset speed distance;
and generating the oil-electricity switching wire according to the third point and the fourth point.
5. The computer-readable storage medium according to claim 4, wherein the "obtaining the minimum vehicle speed at which the engine can operate, the maximum vehicle speed at which the motor can operate, and the maximum and minimum gradient values" is specifically:
acquiring the minimum vehicle speed at which the engine can run according to the characteristics of the vehicle type of the engine;
acquiring the maximum speed of the motor which can run according to the rated rotating speed characteristic of the motor;
and acquiring a maximum gradient value and a minimum gradient value according to the road design specification.
6. The computer-readable storage medium according to claim 4, wherein the "acquiring a current vehicle speed and a current gradient value of the vehicle, and determining the power driving mode of the vehicle according to the current vehicle speed, the current gradient value, the electric-oil switching line, the oil-electric switching line, and the hybrid power region" is specifically:
collecting the current speed and the current gradient value of the vehicle;
if the current vehicle speed and the current gradient value are in the hybrid power area, hybrid driving is adopted;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are driven by a motor at present, calculating to obtain a first speed according to the current gradient value and the electric oil switching line;
if the current speed is higher than the first speed, the motor is switched to be driven, otherwise, the motor is kept to be driven;
if the current vehicle speed and the current gradient value are not in the hybrid power area and are currently driven by an engine, calculating to obtain a second speed according to the current gradient value and the oil-electricity switching line;
if the current vehicle speed is less than the second speed, the vehicle is switched to be driven by the motor, and if not, the engine is kept to be driven.
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