CN113386732B - Switching method for working modes of non-plug-in hybrid electric vehicle - Google Patents

Switching method for working modes of non-plug-in hybrid electric vehicle Download PDF

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Publication number
CN113386732B
CN113386732B CN202110736256.9A CN202110736256A CN113386732B CN 113386732 B CN113386732 B CN 113386732B CN 202110736256 A CN202110736256 A CN 202110736256A CN 113386732 B CN113386732 B CN 113386732B
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vehicle
oil consumption
working mode
equivalent ratio
whole vehicle
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CN113386732A (en
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杨云波
钟云锋
赵鹏遥
任亚为
王昊
武斐
张学锋
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FAW Group Corp
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FAW Group Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention belongs to the technical field of power control of hybrid vehicles, and discloses a method for switching working modes of a non-plug-in hybrid vehicle, which comprises the following steps: determining corresponding electric quantity equivalent ratio oil consumption according to the current state of charge of the high-voltage storage battery; determining the equivalent ratio oil consumption of the whole vehicle in a pure electric working mode according to the current electric quantity equivalent ratio oil consumption; determining the equivalent ratio oil consumption of the whole vehicle in a series working mode according to the current electric quantity equivalent ratio oil consumption and the wheel end driving power; determining the equivalent ratio oil consumption of the whole vehicle in a parallel mode according to the current electric quantity equivalent ratio oil consumption, the wheel end driving power and the vehicle speed; and switching the vehicle to a working mode with the minimum equivalent specific oil consumption of the whole vehicle according to the equivalent specific oil consumption of the whole vehicle under the pure electric, series and parallel working modes. According to the invention, the economy of the vehicle in pure electric, series and parallel working modes is measured from the perspective of the equivalent specific oil consumption of the whole vehicle, the switching of the working modes of the vehicle is controlled, the oil consumption of the vehicle is reduced, and the economy level of the vehicle is improved.

Description

Switching method for working modes of non-plug-in hybrid electric vehicle
Technical Field
The invention relates to the technical field of power control of hybrid vehicles, in particular to a method for switching working modes of a non-plug-in hybrid vehicle.
Background
The hybrid electric vehicle has a plurality of working modes, energy transmission chains and torque transmission paths of different working modes are different, and the power performance, the economic performance and the drivability of the hybrid electric vehicle are different.
The power assembly of the hybrid electric vehicle mainly comprises an engine, a power generation motor, a driving motor, a clutch, a power battery and other parts, and the non-plug-in hybrid electric vehicle mainly has three working modes of pure electric, series connection and parallel connection. In the prior art, the control of the operating mode switching condition emphasizes the dynamic performance of the vehicle, and the operating mode switching condition is typically determined according to the current acceleration, the opening degree of an accelerator pedal, the required power, the maximum acceleration of the vehicle, the oil threshold value and the reference power, and is not considered in economy.
Disclosure of Invention
The invention aims to provide a method for switching the working mode of a non-plug-in electric hybrid vehicle, which can switch the working mode of the vehicle based on economy.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of switching operating modes of a non-plug-in hybrid electric vehicle, comprising:
determining the electric quantity equivalent ratio oil consumption corresponding to the current state of charge of the high-voltage storage battery according to the current state of charge of the high-voltage storage battery;
determining the equivalent ratio oil consumption of the whole vehicle in a pure electric working mode according to the current electric quantity equivalent ratio oil consumption;
determining the equivalent ratio oil consumption of the whole vehicle in a series working mode according to the current electric quantity equivalent ratio oil consumption and the wheel end driving power;
determining the equivalent ratio oil consumption of the whole vehicle in a parallel mode according to the current electric quantity equivalent ratio oil consumption, the wheel end driving power and the vehicle speed;
and switching the vehicle to a working mode with the minimum equivalent specific oil consumption of the whole vehicle according to the equivalent specific oil consumption of the whole vehicle in the pure electric working mode, the series working mode and the parallel working mode.
Preferably, a first switching step and a second switching step are provided;
in the first switching step, the vehicle is switched between the pure electric working mode and the series working mode according to the equivalent specific oil consumption of the whole vehicle under the pure electric working mode and the series working mode;
and in the second switching step, the vehicle is switched between the series working mode and the parallel working mode according to the equivalent specific oil consumption of the whole vehicle in the series working mode and the parallel working mode.
Preferably, the first switching step comprises:
when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is less than that in the series working mode, the whole vehicle controller controls the vehicle to be switched to the pure electric working mode;
when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is not less than the equivalent ratio oil consumption of the whole vehicle in the series working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode.
Preferably, the second switching step includes:
when the equivalent ratio oil consumption of the whole vehicle in the series working mode is less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode;
and when the equivalent ratio oil consumption of the whole vehicle in the series working mode is not less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the parallel working mode.
Preferably, a first information association table is prestored in the vehicle control unit;
the first information association table is a corresponding relation table of the state of charge of the high-voltage storage battery and the fuel consumption of the electric quantity equivalence ratio, the vehicle controller determines the fuel consumption of the electric quantity equivalence ratio corresponding to the current state of charge of the high-voltage storage battery according to the first information association table, and determines the fuel consumption of the vehicle equivalence ratio under the pure electric working mode according to the fuel consumption of the electric quantity equivalence ratio.
Preferably, a second information association table is prestored in the vehicle control unit;
the second information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power and finished automobile equivalent ratio oil consumption, and the finished automobile controller determines finished automobile equivalent ratio oil consumption in a series working mode according to the second information association table.
Preferably, a third information association table is prestored in the vehicle controller;
the third information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power, vehicle speed and finished vehicle equivalent ratio oil consumption, and the finished vehicle controller determines finished vehicle equivalent ratio oil consumption in a parallel working mode according to the third information association table.
Preferably, when the equivalent specific fuel consumption of the whole vehicle in the pure electric working mode is calculated, the formula be is used EV_vehicle ＝be battery /η mec1 /η EM1 Calculating;
wherein, be EV_vehicle Be the equivalent specific oil consumption of the whole vehicle in the pure electric working mode battery The fuel consumption is the equivalent ratio of electric quantity; eta mec1 For driving the mechanical transmission efficiency of the motor, eta EM1 To drive motor efficiency.
Preferably, when the equivalent specific fuel consumption of the whole vehicle in the series working mode is calculated, the formula be is used ser_vehicle_nwo ＝(fuel battery_ste +fuel engine_set )/P wheel_set Calculating;
wherein, be ser_vehicle_now Is the equivalent specific oil consumption of the whole vehicle in a series working mode, fuel battery_set Fuel for instantaneous fuel consumption of high-voltage accumulators engine_set For instantaneous fuel consumption of the engine, P wheel_set Is the wheel end drive power.
Preferably, when the equivalent specific fuel consumption of the whole vehicle in the parallel working mode is calculated, the formula be is used para_vehicle_nwo ＝(fuel battery_praa_set +fuel engine_para_set )/P wheel_par_aset Calculating;
wherein, be para_vehicle_now Is the equivalent specific oil consumption of the whole vehicle in a parallel working mode, fuel battery_para_set For instantaneous fuel consumption of high-voltage accumulators engine_para_set For instantaneous fuel consumption of the engine, P wheel_para_set Is the wheel end drive power.
The invention has the beneficial effects that:
according to the invention, the economical efficiency of the vehicle in the pure electric working mode, the series working mode and the parallel working mode is measured from the perspective of the equivalent specific oil consumption of the whole vehicle, the switching of the working modes of the vehicle is controlled, the oil consumption of the vehicle is reduced, and the economical level of the vehicle is improved.
Drawings
Fig. 1 is a flowchart of a method for switching an operating mode of a non-plug-in hybrid electric vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides a switching method of a working mode of a non-plug-in hybrid electric vehicle, which comprises the following steps: determining the electric quantity equivalent ratio oil consumption corresponding to the current state of charge of the high-voltage storage battery according to the current state of charge of the high-voltage storage battery; determining the equivalent ratio oil consumption of the whole vehicle in a pure electric working mode according to the current electric quantity equivalent ratio oil consumption; determining the equivalent ratio oil consumption of the whole vehicle in a series working mode according to the current electric quantity equivalent ratio oil consumption and the wheel end driving power; determining the equivalent ratio oil consumption of the whole vehicle in a parallel mode according to the current electric quantity equivalent ratio oil consumption, the wheel end driving power and the vehicle speed; and switching the vehicle to a working mode with the minimum finished vehicle equivalent specific oil consumption according to the finished vehicle equivalent specific oil consumption in the pure electric working mode, the series working mode and the parallel working mode.
According to the invention, the economical efficiency of the vehicle in the pure electric working mode, the series working mode and the parallel working mode is measured from the perspective of the equivalent specific oil consumption of the whole vehicle, the switching of the working modes of the vehicle is controlled, the oil consumption of the vehicle is reduced, and the economical level of the vehicle is improved.
Alternatively, the switching method of the non-plug-in hybrid vehicle operation mode is provided with a first switching step and a second switching step. In the first switching step, the vehicle is switched between the pure electric working mode and the series working mode according to the equivalent specific fuel consumption of the whole vehicle under the pure electric working mode and the series working mode; and in the second switching step, the vehicle is switched between the series working mode and the parallel working mode according to the equivalent specific oil consumption of the whole vehicle in the series working mode and the parallel working mode. The setting has simple comparison logic and reliable and efficient execution.
Specifically, the first switching step includes: when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is less than that in the series working mode, the whole vehicle controller controls the vehicle to be switched to the pure electric working mode; when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is not less than the equivalent ratio oil consumption of the whole vehicle in the series working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode. According to the arrangement, the vehicle can switch and operate in the working mode with lower equivalent specific oil consumption of the whole vehicle in the pure electric working mode and the series working mode.
More specifically, the second switching step includes: when the equivalent ratio oil consumption of the whole vehicle in the series working mode is less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode; and when the equivalent ratio oil consumption of the whole vehicle in the series working mode is not less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the parallel working mode. By means of the arrangement, the vehicle can switch to operate in a working mode with lower equivalent specific oil consumption of the whole vehicle in a series working mode and a parallel working mode.
Optionally, a first information association table is prestored in the vehicle controller; the first information association table is a corresponding relation table of the state of charge of the high-voltage storage battery and the fuel consumption of the electric quantity equivalence ratio, the vehicle controller determines the fuel consumption of the electric quantity equivalence ratio corresponding to the current state of charge of the high-voltage storage battery according to the first information association table, and determines the fuel consumption of the vehicle equivalence ratio under the pure electric working mode according to the fuel consumption of the electric quantity equivalence ratio. By means of the arrangement, the operation execution efficiency of the whole vehicle controller is improved.
In this embodiment, the obtaining manner of the first information association table includes, but is not limited to, the following manners: the relation between the electric quantity acquisition quantity of the high-voltage storage battery and the consumed fuel quantity of the high-voltage storage battery in actual use of a user is acquired through a big data means, and a first information association table is acquired through data characteristic extraction.
Specifically, the average value of all working conditions is taken as the electric quantity equivalent ratio oil consumption corresponding to the charge state median value of the high-voltage storage battery; taking the maximum value in all working conditions as the electric quantity equivalent ratio oil consumption corresponding to the use lower limit of the charge state of the high-voltage storage battery; taking the minimum value in all working conditions as the electric quantity equivalent ratio oil consumption corresponding to the use upper limit of the charge state of the high-voltage storage battery; and electric quantity equivalent ratio oil consumption corresponding to the charge states of other high-voltage storage batteries is obtained through interpolation.
Specifically, the equivalent specific oil consumption of the whole vehicle in the pure electric working mode is calculated by the following formula:
be EV_vehicle ＝be battery /η mec1 /η EM1
in the formula: be EV_vehicle The fuel consumption is the equivalent ratio fuel consumption of the whole vehicle in the pure electric working mode; be battery The fuel consumption is the equivalent ratio of electric quantity; eta mec1 To drive the motor mechanical transmission efficiency; eta EM1 To drive motor efficiency.
Optionally, a second information association table is prestored in the vehicle controller; the second information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power and finished automobile equivalent ratio oil consumption in the series working mode, and the finished automobile controller determines finished automobile equivalent ratio oil consumption in the series working mode according to the second information association table. By means of the arrangement, the operation execution efficiency of the whole vehicle controller is improved.
In this embodiment, the obtaining manner of the second information association table includes, but is not limited to, the following steps:
s101, selecting equivalent specific fuel consumption of a certain electric quantity, driving power of a certain wheel end and power of a certain engine.
S102, selecting different engine rotating speeds, and calculating the engine output torque corresponding to the selected engine power through the following formula:
T engine_set ＝P engine_set *9549.5/n engine_set
in the formula: t is engine_set Is the calculated engine torque; p is engine_set For a selected engine power; n is engine_set Is the selected engine speed.
And S103, searching a pre-stored association table of universal characteristic information of the engine according to different combinations of the engine rotating speed and the engine torque obtained by calculation in S102, and obtaining the specific fuel consumption corresponding to different combinations of the engine rotating speed and the engine torque.
And S104, selecting the minimum value of the specific oil consumption in the specific oil consumption corresponding to different combinations of the engine speed and the engine torque in the S103 as the equivalent specific oil consumption of the engine.
S105, calculating the instantaneous oil consumption of the engine, wherein the instantaneous oil consumption of the engine is calculated through the following formula:
fuel engine_set ＝P engine_set *be engine_min
in the formula: fuel engine_set Is the calculated instantaneous fuel consumption of the engine; p engine_set For a selected engine power; be engine_min The equivalent specific fuel consumption of the engine determined in S104.
S106, calculating the output electric power of the generator, wherein the calculation formula is as follows:
P EM2_elec ＝P engine_set *η mec2 *η EM2
in the formula: p EM2_elec Is the calculated output electric power of the generator; p is engine_set For a selected engine power; eta mec2 The transmission efficiency of the power generation machinery is improved; eta EM2 Is the generator efficiency.
S107, calculating the consumed electric power of the driving motor, wherein the calculation formula is as follows:
P EM1_elec ＝P Whl_output /η mec1 /η EM1
in the formula: p EM1_elec Calculating the consumed electric power of the driving motor; p whl_output A selected wheel end drive power; eta mec1 To drive mechanical transmission efficiency; eta EM1 To drive motor efficiency.
S108, calculating the electric power of the high-voltage storage battery, wherein the calculation formula is as follows:
P bat_elec ＝P EM1_elec -P EM2_elec
in the formula: p bat_elec Is the calculated electric power of the high-voltage battery; p EM1_elec Is the consumed electric power of the drive motor calculated in S107; p EM2_elec Is the output electric power of the generator calculated in S106.
S109, calculating the instantaneous oil consumption of the high-voltage storage battery, wherein the calculation steps are as follows:
when P is calculated in S108 bat_elec When the fuel consumption is less than zero, the instantaneous fuel consumption of the high-voltage storage battery is calculated by the following formula:
fuel battery_set ＝P bat_elec *be engine_min /η EM2 /η mec2 /η charge
in the formula: fuel battery_set Calculating the instantaneous fuel consumption of the high-voltage storage battery; p bat_elec Electric power for the high-voltage battery calculated in S108; be engine_min The equivalent specific fuel consumption of the engine determined in the S104; eta mec2 The transmission efficiency of the power generation machinery is improved; eta EM2 To the generator efficiency; eta charge High voltage battery efficiency.
When P is calculated in S108 bat_elec When the fuel consumption is not less than zero, the instantaneous fuel consumption of the high-voltage storage battery is calculated by the following formula:
fuel battery_set ＝P bat_elec *be battery_set
in the formula: fuel battery_set Calculating the instantaneous fuel consumption of the high-voltage storage battery; p is bat_elec Electric power for the high-voltage battery calculated in S108; be battery_set The selected electric quantity is equivalent to the specific oil consumption.
S110, calculating the equivalent specific fuel consumption of the whole vehicle under the current working condition of the series mode, wherein the equivalent specific fuel consumption is calculated through the following formula:
be ser_vehicle_nwo ＝(fuel battery_ste +fuel engine_set )/P wheel_set
in the formula: be ser_vehicle_now Calculating the equivalent specific oil consumption of the whole vehicle under the current working condition of the series working mode; fuel battery_set Fuel, the instantaneous fuel consumption of the high-voltage battery calculated in S109 engine_set Is the engine instantaneous fuel consumption calculated in S105; p wheel_set For the selected wheel end drive power.
S111, selecting the equivalent ratio oil consumption of a certain electric quantity and the driving power of a certain wheel end, repeating the calculation process, and calculating the power of different enginesSelecting the minimum value of the equivalent ratio oil consumption of the whole vehicle as the selected electric quantity equivalent ratio oil consumption and the whole vehicle equivalent ratio oil consumption be under the selected wheel end driving power ser_vehicle 。
And S112, repeating the process, calculating the equivalent specific oil consumption of different electric quantities and the equivalent specific oil consumption of the whole vehicle corresponding to the driving power of different wheel ends, and forming a second information association table.
Optionally, a third information association table is prestored in the vehicle controller; the third information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power, vehicle speed and finished vehicle equivalent ratio oil consumption in the parallel working mode, and the finished vehicle controller determines finished vehicle equivalent ratio oil consumption in the parallel working mode according to the third information association table. By means of the arrangement, the operation execution efficiency of the whole vehicle controller is improved.
In this embodiment, the obtaining manner of the third information association table includes, but is not limited to, the following steps:
s201, selecting a certain electric quantity equivalent ratio oil consumption, a certain wheel end driving power, a certain vehicle speed and a certain engine power.
S202, calculating the rotating speed of the engine, wherein the rotating speed of the engine is calculated through the following formula:
n engine_para_set ＝VS set *1000/(2*π*r tire *60)*i gear
in the formula: n is engine_para_set Is the calculated engine speed; VS set A selected vehicle speed; r is tire Is the tire radius; i.e. i gear An engine driven transmission speed ratio.
S203, calculating the engine torque, wherein the engine torque is calculated by the following formula:
T engine_para_set ＝P engine_para_set *9549.5/n engine_para_set
in the formula: t is engine_para_set Is the calculated engine torque; p engine_para_set For a selected engine power; n is engine_para_set The engine speed calculated in S202.
And S204, searching a pre-stored correlation table of the universal characteristic information of the engine according to the rotating speed of the engine obtained in the step S202 and the torque of the engine obtained in the step S203, and obtaining the equivalent ratio oil consumption of the engine.
S205, calculating the instantaneous oil consumption of the engine, wherein the instantaneous oil consumption of the engine is calculated through the following formula:
fuel engine_para_set ＝P engine_para_set *be engine_paar
in the formula: fuel (fossil fuel oil) engine_para_set Is the calculated instantaneous fuel consumption of the engine; p engine_para_set For a selected engine power; be engine_para Is the specific equivalent fuel consumption of the engine determined in S204.
S206, calculating the mechanical power of the driving motor, wherein the calculation formula is as follows:
P EM1_mec ＝P engine_paar_set *η mec3 -P wheel_set
in the formula: p EM1_mec Is the calculated mechanical power of the driving motor; p engine_para_set For a selected engine power; eta mec3 Driving mechanical transmission efficiency for the engine; p wheel_set The wheel end driving power selected in S201.
S207, calculating the instantaneous oil consumption of the high-voltage storage battery, wherein the calculation steps are as follows:
when P is calculated in S206 EM1_mec When the fuel consumption is less than zero, the instantaneous fuel consumption of the high-voltage storage battery is calculated by the following formula:
fuel battery_praa_set ＝P EM1_mec *η charge *be engine_para /η mec3
in the formula: fuel battery_para_set Calculating the instantaneous fuel consumption of the high-voltage storage battery; p EM1_mec Is the mechanical power of the drive motor calculated in S206; be engine_para The equivalent specific fuel consumption of the engine determined in the step S204; eta charge Efficiency of a high voltage battery; eta mec3 To drive the transmission efficiency for the engine.
When P is calculated in S206 EM1_mec When the fuel consumption is not less than zero, the instantaneous fuel consumption of the high-voltage storage battery is calculated by the following formula:
fuel battery_para_set ＝P EM1_mec *be battery_para_set /η mec1
in the formula: fuel battery_para_set Calculating the instantaneous fuel consumption of the high-voltage storage battery; p EM1_mec Is the mechanical power of the drive motor calculated in S206; eta mec3 For driving the motor to drive the transmission efficiency, be battery_para_set And the electric quantity equivalent ratio oil consumption selected in the step S201.
S208, calculating the equivalent specific fuel consumption of the whole vehicle under the current working condition of the parallel mode, wherein the equivalent specific fuel consumption is calculated through the following formula:
be para_vehicle_nwo ＝(fuel battery_praa_set +fuel engine_para_set )/P wheel_par_aset
in the formula: be para_vehicle_now Calculating the equivalent specific oil consumption of the whole vehicle under the current working condition of the parallel mode; fuel battery_para_set Instantaneous fuel consumption of the high-voltage battery calculated for S207 engine_para_set Is the engine instantaneous fuel consumption calculated in S205; p wheel_para_set The wheel end driving power selected in S201.
S209, selecting a certain electric quantity equivalence ratio oil consumption, a certain wheel end driving power and a certain vehicle speed, repeating the calculation process, calculating the corresponding whole vehicle equivalence ratio oil consumption under different engine powers, and selecting the minimum value of the whole vehicle equivalence ratio oil consumption as the selected electric quantity equivalence ratio oil consumption, the selected wheel end driving power and the whole vehicle equivalence ratio oil consumption be under the selected vehicle speed para_vehicle 。
S210, calculating the selected vehicle speed, the fuel consumption with the equivalent ratio of different electric quantities and the fuel consumption with the equivalent ratio of the whole vehicle corresponding to the driving power of different wheel ends.
S210, calculating the equivalent ratio oil consumption of the whole vehicle corresponding to different vehicle speeds, different electric quantity equivalent ratio oil consumption and different wheel end driving powers to form a third information association table.
As shown in fig. 1, the method for switching the operating modes of the non-plug-in hybrid electric vehicle provided by the invention integrally comprises the following steps:
the method comprises the steps of firstly, determining the equivalent ratio oil consumption of electric quantity corresponding to the current state of charge of the high-voltage storage battery through a first information association table according to the current state of charge of the high-voltage storage battery.
In the step, a first information association table is prestored in the vehicle controller, the first information association table is a corresponding relation table of the state of charge of the high-voltage storage battery and the fuel consumption of the electric quantity equivalence ratio, and the vehicle controller determines the corresponding fuel consumption of the electric quantity equivalence ratio according to the table look-up of the state of charge of the current high-voltage storage battery.
The first information association table is obtained by acquiring the relation between the electric quantity acquisition quantity of the high-voltage storage battery and the consumed fuel quantity thereof in actual use of a user through a big data means and extracting data characteristics.
And step two, determining the equivalent specific oil consumption be1 of the whole vehicle in the pure electric working mode according to the current electric quantity equivalent specific oil consumption.
In the pure electric working mode, the high-voltage storage battery supplies power to the driving motor, and the driving motor drives the vehicle to run. Therefore, the vehicle equivalent ratio oil consumption be1 in the pure electric working mode is related to the current electric quantity equivalent ratio oil consumption, the mechanical transmission efficiency of the driving motor and the efficiency of the driving motor, and the vehicle controller is obtained through calculation by a preset formula.
And thirdly, determining the equivalent ratio oil consumption be2 of the whole vehicle in the series working mode through a second information association table according to the current electric quantity equivalent ratio oil consumption and the wheel end driving power.
In the step, a second information association table is prestored in the vehicle controller, the second information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power and vehicle equivalent ratio oil consumption, and the vehicle controller determines the vehicle equivalent ratio oil consumption be2 under the corresponding series working mode according to the current electric quantity equivalent ratio oil consumption and wheel end driving power look-up table.
The second information association table is calculated by a corresponding empirical formula.
And step four, determining the equivalent ratio oil consumption be3 of the whole vehicle in the parallel mode through a third information association table according to the current electric quantity equivalent ratio oil consumption, the wheel end driving power and the vehicle speed.
In the step, a third information association table is prestored in the vehicle controller, the third information association table is a corresponding relation table of electric quantity equivalence ratio oil consumption, wheel end driving power, vehicle speed and vehicle equivalence ratio oil consumption, and the vehicle controller determines the corresponding vehicle equivalence ratio oil consumption be3 in the parallel mode according to the current electric quantity equivalence ratio oil consumption, wheel end driving power and vehicle speed table.
The third information association table is calculated by a corresponding empirical formula.
And step five, judging whether the equivalent specific oil consumption be1 of the whole vehicle in the pure electric working mode is smaller than the equivalent specific oil consumption be2 of the whole vehicle in the series working mode, if so, controlling the vehicle to run in the pure electric working mode by the whole vehicle controller, and if not, carrying out the next step.
In the step, a first switching step is executed firstly, whether the equivalent specific fuel consumption be1 of the whole vehicle in the pure electric working mode is smaller than the equivalent specific fuel consumption be2 of the whole vehicle in the series working mode is measured, if the equivalent specific fuel consumption be1 of the whole vehicle in the pure electric working mode is smaller than the equivalent specific fuel consumption be1 of the whole vehicle in the pure electric working mode, the vehicle is controlled to run in the pure electric working mode, and if not, a second switching step is executed.
And step five, judging whether the equivalent specific oil consumption be2 of the whole vehicle in the series working mode is smaller than the equivalent specific oil consumption be3 of the whole vehicle in the parallel working mode, if so, controlling the vehicle to run in the series working mode by the whole vehicle controller, and if not, controlling the vehicle to run in the parallel working mode by the whole vehicle controller.
In the step, in the second switching step, the relation between the overall equivalent ratio oil consumption be2 in the series working mode and the overall equivalent ratio oil consumption be3 in the parallel working mode is measured, if the overall equivalent ratio oil consumption be2 in the series working mode is smaller, the vehicle is controlled to run in the series working mode, and if not, the vehicle is controlled to run in the parallel working mode.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A method for switching operating modes of a non-plug-in hybrid electric vehicle, comprising:
determining the electric quantity equivalent ratio oil consumption corresponding to the current state of charge of the high-voltage storage battery according to the current state of charge of the high-voltage storage battery;
determining the equivalent ratio oil consumption of the whole vehicle in a pure electric working mode according to the current electric quantity equivalent ratio oil consumption;
determining the equivalent ratio oil consumption of the whole vehicle in a series working mode according to the current electric quantity equivalent ratio oil consumption and the wheel end driving power;
determining the equivalent ratio oil consumption of the whole vehicle in a parallel mode according to the current electric quantity equivalent ratio oil consumption, the wheel end driving power and the vehicle speed;
according to the equivalent specific fuel consumption of the whole vehicle in the pure electric working mode, the series working mode and the parallel working mode, switching the vehicle to a working mode with the minimum equivalent specific fuel consumption of the whole vehicle;
acquiring the relation between the electric quantity acquisition quantity of the high-voltage storage battery and the fuel consumption quantity of the high-voltage storage battery in actual use of a user through a big data means, and acquiring a first information association table through data characteristic extraction;
taking the average value of all working conditions as the electric quantity equivalent ratio oil consumption corresponding to the middle value of the charge state of the high-voltage storage battery; taking the maximum value in all working conditions as the electric quantity equivalent ratio oil consumption corresponding to the use lower limit of the charge state of the high-voltage storage battery; taking the minimum value in all working conditions as the electric quantity equivalent ratio oil consumption corresponding to the use upper limit of the charge state of the high-voltage storage battery; and electric quantity equivalent ratio oil consumption corresponding to the charge states of other high-voltage storage batteries is obtained through interpolation.
2. The switching method of the operation mode of the non-plug-in hybrid electric vehicle according to claim 1, characterized in that a first switching step and a second switching step are provided;
in the first switching step, the vehicle is switched between the pure electric working mode and the series working mode according to the equivalent specific fuel consumption of the whole vehicle under the pure electric working mode and the series working mode;
and in the second switching step, the vehicle is switched between the series working mode and the parallel working mode according to the equivalent specific oil consumption of the whole vehicle in the series working mode and the parallel working mode.
3. The switching method of the operation mode of the non-plug-in hybrid electric vehicle according to claim 2, wherein the first switching step includes:
when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is less than that in the series working mode, the whole vehicle controller controls the vehicle to be switched to the pure electric working mode;
when the equivalent ratio oil consumption of the whole vehicle in the pure electric working mode is not less than the equivalent ratio oil consumption of the whole vehicle in the series working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode.
4. The method for switching the operating mode of the non-plug-in hybrid electric vehicle according to claim 2, wherein the second switching step comprises:
when the equivalent ratio oil consumption of the whole vehicle in the series working mode is less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the series working mode;
and when the equivalent ratio oil consumption of the whole vehicle in the series working mode is not less than that in the parallel working mode, the whole vehicle controller controls the vehicle to be switched to the parallel working mode.
5. The method for switching the operating mode of the non-plug-in hybrid electric vehicle according to claim 1, wherein a first information association table is prestored in the vehicle control unit;
the first information association table is a corresponding relation table of the state of charge of the high-voltage storage battery and the fuel consumption of the electric quantity equivalence ratio, the vehicle controller determines the fuel consumption of the electric quantity equivalence ratio corresponding to the current state of charge of the high-voltage storage battery according to the first information association table, and determines the fuel consumption of the vehicle equivalence ratio under the pure electric working mode according to the fuel consumption of the electric quantity equivalence ratio.
6. The method for switching the operating mode of the non-plug-in hybrid electric vehicle according to claim 1, wherein a second information association table is prestored in the vehicle control unit;
the second information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power and finished automobile equivalent ratio oil consumption, and the finished automobile controller determines finished automobile equivalent ratio oil consumption in a series working mode according to the second information association table.
7. The method for switching the operating mode of the non-plug-in hybrid electric vehicle according to claim 1, wherein a third information association table is prestored in the vehicle control unit;
the third information association table is a corresponding relation table of electric quantity equivalent ratio oil consumption, wheel end driving power, vehicle speed and finished vehicle equivalent ratio oil consumption, and the finished vehicle controller determines finished vehicle equivalent ratio oil consumption in a parallel working mode according to the third information association table.
8. The method for switching the operating modes of the non-plug-in hybrid electric vehicle according to claim 1, wherein the formula be is used for calculating the equivalent specific fuel consumption of the whole vehicle in the pure electric operating mode EV_vehicle ＝be battery /η mec1 /η EM1 Calculating;
wherein, be EV_vehicle Be the equivalent specific oil consumption of the whole vehicle in the pure electric working mode battery The fuel consumption is the equivalent ratio of electric quantity; eta mec1 For driving the mechanical transmission efficiency of the motor, eta EM1 To drive motor efficiency.
9. The method according to claim 1, wherein the calculation of the specific equivalent fuel consumption of the whole vehicle in the series operating mode is performed according to the formula be ser_vehicle_nwo ＝(fuel battery_ste +fuel engine_set )/P wheel_set Calculating;
wherein, be ser_vehicle_now Is the equivalent specific oil consumption of the whole vehicle in a series working mode, fuel battery_set For instantaneous fuel consumption of high-voltage accumulators engine_set For instantaneous fuel consumption of the engine, P wheel_set Is the wheel end drive power.
10. The method according to claim 1, wherein the calculation of the specific fuel consumption in parallel operation mode is performed according to the formula be para_vehicle_nwo ＝(fuel battery_praa_set +fuel engine_para_set )/P wheel_par_aset Calculating;
wherein, be para_vehicle_now Is the equivalent specific oil consumption of the whole vehicle in a parallel working mode, fuel battery_para_set For instantaneous fuel consumption of high-voltage accumulators engine_para_set For instantaneous fuel consumption of the engine, P wheel_para_set Is the wheel end drive power.
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