CN115214613A

CN115214613A - Hybrid vehicle parallel drive control method, device, equipment and storage medium

Info

Publication number: CN115214613A
Application number: CN202210844956.4A
Authority: CN
Inventors: 洪小科; 吴颂; 黄真; 韦鹏; 潘文军; 刘永刚; 全勇; 李通
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-10-21

Abstract

The invention discloses a parallel driving control method, a device, equipment and a storage medium for hybrid vehicles, wherein the parallel driving control method comprises the following steps: when a vehicle enters a parallel driving mode, acquiring an accelerator pedal signal of the vehicle and state information of the vehicle; determining the required torque of the vehicle according to the accelerator pedal signal; and determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy. According to the invention, when the vehicle enters the parallel driving mode, the required torque of the vehicle is determined according to the accelerator pedal signal of the vehicle, the driving strategy in the parallel mode is determined according to the state information and the required torque of the vehicle, and the vehicle is driven to run according to the driving strategy, so that the driving strategy can be determined according to the required torque and the state information of the vehicle, the technical problem of high oil consumption caused by inaccurate control mode of the vehicle in the parallel driving mode is solved, and the oil consumption of the vehicle is reduced.

Description

Parallel drive control method, device and equipment for hybrid vehicle and storage medium

Technical Field

The invention relates to the technical field of hybrid vehicles, in particular to a parallel driving control method, a parallel driving control device, parallel driving control equipment and a parallel driving control storage medium for hybrid vehicles.

Background

At present, hybrid vehicles become an important direction for manufacturers of various automobiles to research and develop, the hybrid vehicles generally drive the vehicles to run by outputting torque to wheels in a multi-power-source torque coupling mode, the driving modes of the hybrid vehicles generally include a pure electric mode, a series mode and a parallel mode, the vehicles adopt the pure electric mode or the series mode under the low-speed condition, the pure electric mode, the parallel mode or the series mode under the high-speed condition, but when the hybrid vehicles enter the parallel mode, the control mode aiming at the parallel mode is inaccurate, so that the oil consumption of the vehicles is high, and therefore how to improve the accuracy of the control of the hybrid vehicles under the parallel mode becomes a technical problem to be solved urgently.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a hybrid vehicle parallel drive control method, a hybrid vehicle parallel drive control device, hybrid vehicle parallel drive control equipment and a storage medium, and aims to solve the technical problem of high oil consumption caused by inaccurate control mode of a hybrid vehicle in a parallel mode in the prior art.

To achieve the above object, the present invention provides a parallel drive control method for a hybrid vehicle, the method comprising the steps of:

when a vehicle enters a parallel driving mode, acquiring an accelerator pedal signal of the vehicle and state information of the vehicle;

determining a required torque of the vehicle according to the accelerator pedal signal;

and determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy.

Optionally, the determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy includes:

determining a preset torque interval where the required torque is located, and determining the battery capacity of the vehicle according to the state information;

and determining a driving strategy according to the preset torque interval and the battery electric quantity, and driving the vehicle to run according to the driving strategy.

Optionally, the determining a driving strategy according to the preset torque interval and the battery power, and driving the vehicle to run according to the driving strategy includes:

when the preset torque interval is a high torque interval, judging whether the required torque is larger than a preset switching torque;

if so, judging whether the electric quantity of the battery is smaller than a first preset electric quantity threshold value;

and if so, controlling the vehicle to exit the parallel driving mode, and controlling the vehicle to enter the series driving mode to drive the vehicle to run.

Optionally, after determining whether the battery power is smaller than a first preset power threshold, the method further includes:

if not, controlling an engine of the vehicle to operate according to a maximum power curve to output a first torque, and controlling a driving motor of the vehicle to output a second torque;

and driving the vehicle to run by the first torque and the second torque.

when the preset torque interval is an economic torque interval, judging whether the electric quantity of the battery is smaller than a first preset electric quantity threshold value;

if so, controlling an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque;

and charging a battery pack through the first power generation torque, and driving the vehicle to run through the first driving torque.

Optionally, after determining whether the battery power is less than a first preset power threshold, the method further includes:

if not, judging whether the electric quantity of the battery is smaller than a second preset electric quantity threshold value, wherein the second preset electric quantity threshold value is larger than the first preset electric quantity threshold value;

if so, controlling an engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second generating torque;

and charging the battery pack through the second power generation torque, and driving the vehicle to run through the second driving torque.

Optionally, after determining whether the battery power is less than a second preset power threshold, the method further includes:

if not, determining compensation power according to a third preset electric quantity threshold value, a compensation electric quantity threshold value and the battery electric quantity, wherein the third preset electric quantity threshold value is larger than the second preset electric quantity threshold value;

obtaining an engine rotating speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine rotating speed value;

controlling an engine of the vehicle to output the required torque and the compensation torque;

and charging the battery pack through the compensation torque, and driving the vehicle to run through the required torque.

Further, to achieve the above object, the present invention also provides a parallel drive control apparatus for a hybrid vehicle, the apparatus including:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring an accelerator pedal signal of a vehicle and state information of the vehicle when the vehicle enters a parallel driving mode;

the determining module is used for determining the required torque of the vehicle according to the accelerator pedal signal;

and the driving module is used for determining a driving strategy according to the state information and the required torque and driving the vehicle to run according to the driving strategy.

Further, to achieve the above object, the present invention also proposes a parallel drive control apparatus for a hybrid vehicle, the apparatus including: the hybrid vehicle parallel drive control method comprises a memory, a processor and a hybrid vehicle parallel drive control program stored on the memory and operable on the processor, the hybrid vehicle parallel drive control program being configured to implement the steps of the hybrid vehicle parallel drive control method as described above.

In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a hybrid vehicle parallel drive control program that, when executed by a processor, implements the steps of the hybrid vehicle parallel drive control method as described above.

According to the invention, when a vehicle enters a parallel driving mode, an accelerator pedal signal of the vehicle and state information of the vehicle are acquired; determining a required torque of the vehicle according to the accelerator pedal signal; and determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy. According to the invention, when the vehicle enters the parallel driving mode, the required torque of the vehicle is determined according to the accelerator pedal signal of the vehicle, the driving strategy in the parallel mode is determined according to the state information and the required torque of the vehicle, the vehicle is driven to run according to the driving strategy, the driving strategy can be determined according to the required torque and the state information of the vehicle, the technical problem of high oil consumption caused by inaccurate control mode of the vehicle in the parallel driving mode is solved, and the oil consumption of the vehicle is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a hybrid vehicle parallel drive control apparatus in a hardware operating environment according to an embodiment of the present invention;

fig. 2 is a schematic flowchart of a parallel drive control method for a hybrid vehicle according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating the electric quantity division of a battery pack according to an embodiment of the parallel driving control method for a hybrid vehicle of the present invention;

fig. 4 is a flowchart illustrating a parallel drive control method for a hybrid vehicle according to a second embodiment of the present invention;

fig. 5 is a block diagram showing the configuration of the first embodiment of the hybrid vehicle parallel drive control apparatus of the present invention.

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a hybrid vehicle parallel drive control device according to a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the hybrid vehicle parallel drive control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.

Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of a hybrid vehicle parallel drive control apparatus, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a hybrid vehicle parallel drive control program.

In the hybrid vehicle parallel drive control apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the hybrid vehicle parallel drive control apparatus of the invention may be provided in the hybrid vehicle parallel drive control apparatus which calls the hybrid vehicle parallel drive control program stored in the memory 1005 through the processor 1001 and executes the hybrid vehicle parallel drive control method provided by the embodiment of the invention.

An embodiment of the invention provides a hybrid vehicle parallel driving control method, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the hybrid vehicle parallel driving control method according to the invention.

In this embodiment, the parallel drive control method for a hybrid vehicle includes the steps of:

step S1: when a vehicle enters a parallel driving mode, acquiring an accelerator pedal signal of the vehicle and state information of the vehicle.

It should be noted that the execution subject of the embodiment may be a computing service device with data processing, network communication and program running functions, such as an on-board computer, a vehicle control unit, etc., or an electronic device, a hybrid vehicle parallel driving mode control device, etc., capable of implementing the above functions. The present embodiment and the following embodiments will be described below by taking a vehicle control unit as an example.

In the present embodiment, the hybrid vehicle may be a hybrid vehicle of a P1+ P3 structure; when the vehicle meets a preset condition, the vehicle enters a parallel driving mode, wherein the preset condition can be that the vehicle speed is higher than a preset speed, the battery electric quantity is higher than a preset electric quantity and/or the accelerator pedal depth is higher than a preset depth, and the preset condition can be set according to specific conditions; the accelerator pedal signal may be a signal indicative of an accelerator pedal opening; the state information may be information during the vehicle running, and includes information on the battery level, the temperature of the component, whether the component is abnormal, and the like.

In specific implementation, when a vehicle meets a preset condition, the vehicle is controlled to enter a parallel driving mode, and an accelerator pedal signal of the vehicle and information such as battery capacity and component temperature of the vehicle are acquired.

Step S2: determining a required torque of the vehicle based on the accelerator pedal signal.

It is understood that the required torque may be a torque which is output by a vehicle power system and is requested by a driver through an accelerator pedal to drive a vehicle to run, the accelerator opening may be determined according to the accelerator pedal signal, and the corresponding required torque may be determined according to the accelerator opening and a preset mapping relationship between the accelerator opening and the torque.

And step S3: and determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy.

It is understood that the driving strategy may be a strategy for controlling the vehicle powertrain to output torque to drive the vehicle; determining the driving strategy according to the state information and the required torque may be determining a vehicle operating condition according to the state information, and determining the driving strategy according to the vehicle operating condition and the required torque.

In the specific implementation, the vehicle controller controls the vehicle to enter a parallel driving mode when the vehicle meets a preset condition, determines the accelerator opening according to the acquired accelerator pedal signal when the vehicle enters the parallel driving mode, determines the required torque corresponding to the accelerator pedal signal according to a preset mapping relation between the accelerator opening and the torque, determines the vehicle working condition according to the state information of the vehicle, determines a corresponding driving strategy according to the vehicle working condition and the required torque, and controls the vehicle power system to output the torque to drive the vehicle to run according to the driving strategy.

Further, in order to improve the accuracy of the hybrid vehicle control in the parallel drive mode, the step S3 includes:

step S31: and determining a preset torque interval where the required torque is located, and determining the battery capacity of the vehicle according to the state information.

It can be understood that the preset torque interval may be a preset interval for distinguishing the magnitude of the required torque, the preset torque interval includes a low torque interval, an economic torque interval and a high torque interval, the required torque in the low torque interval indicates that the torque required to be output by the vehicle powertrain is small, the required torque in the economic torque interval indicates that the torque required to be output by the vehicle powertrain is moderate, and the required torque in the high torque interval indicates that the torque required to be output by the vehicle powertrain is large, for example, the three torque intervals may be sequentially expressed as: [ a, b), [ b, c) and [ c, d ], wherein a < b < c, the torque interval can also be expressed in other forms, and the embodiment is not limited herein; the battery charge may be a remaining charge of the vehicle power battery.

Step S32: and determining a driving strategy according to the preset torque interval and the battery electric quantity, and driving the vehicle to run according to the driving strategy.

It should be understood that the determining of the driving strategy according to the preset torque interval and the battery level may be determining the driving strategy according to the type of the preset torque interval and the battery level.

In specific implementation, a preset torque interval in which the required torque is located is a low torque interval, which indicates that the torque required to be output by a vehicle power system is small, and when the battery electric quantity of the vehicle is greater than a first preset electric quantity threshold value, the vehicle is controlled to be switched from a parallel driving mode to an electric pure driving mode in order to reduce the vehicle oil consumption.

Further, in order to prevent the performance of the battery pack from being damaged due to long-term power shortage, the step S32 includes: when the preset torque interval is a high torque interval, judging whether the required torque is larger than a preset switching torque; if so, judging whether the electric quantity of the battery is smaller than a first preset electric quantity threshold value; and if so, controlling the vehicle to exit the parallel driving mode, and controlling the vehicle to enter the series driving mode to drive the vehicle to run.

It can be understood that the preset switching torque can be a preset torque value, and can be obtained by calibrating according to the driving capability of the motor, the power supply capability of the battery pack and the switching smoothness requirement of the series-parallel connection clutch, and the preset switching torque is stored in the local memory after calibration is completed, and can be directly read from the local memory when in use, if the required torque is greater than the preset switching torque, it is indicated that the engine and the driving motor are required to provide torque for the vehicle together; the first preset electric quantity threshold value can be a preset electric quantity boundary value for forced power generation, namely when the electric quantity of the battery pack is smaller than the first preset electric quantity threshold value, the battery pack needs to be charged forcibly for protecting the battery pack; the series driving mode may be a series generating driving mode.

Further, in order to reduce the oil consumption of the vehicle while meeting the torque demand of the whole vehicle, the method further includes, after judging whether the battery electric quantity is smaller than a first preset electric quantity threshold value: if not, controlling an engine of the vehicle to operate according to a maximum power curve to output a first torque, and controlling a driving motor of the vehicle to output a second torque; and driving the vehicle to run by the first torque and the second torque.

It can be understood that when the required torque is in a high torque interval, the torque required to be output by a vehicle power system is relatively large, in order to meet the power requirement of the vehicle, the engine and the driving motor work simultaneously at the moment, the engine outputs a first torque, the driving motor outputs a second torque, the sum of the first torque and the second torque is the required torque, and the vehicle is driven to run by the first torque and the second torque together.

In a specific implementation, referring to fig. 3, fig. 3 is a schematic diagram of electric quantity division of a battery pack, ve is the lowest electric quantity of the battery pack, and a high voltage on a vehicle is not allowed below the lowest electric quantity, for example, ve may be set to 30%; vf is a first preset electric quantity threshold, below which forced power generation is generally required, for example Vf may be set to 38%; vg is a second preset electric quantity threshold, below which electricity generation is prioritized, NVH and drivability are secondarily considered, for example, vg may be set to 48%; vl is a compensation power threshold value, and when the power is lower than the threshold value, compensation is carried out according to the maximum compensation power, for example, vl can be set to be 55%; vb is a third preset electric quantity threshold value, when the electric quantity is higher than the third preset electric quantity threshold value, power compensation is not carried out, and Vb can be set to be 62% for example; vh is the highest electric quantity of the battery pack, above which the battery pack is not allowed to be charged, for example, vh may be set to 78%, and the electric quantity value may be set to other values according to actual situations, and the embodiment is not limited herein; when the required torque is in a high torque curve, judging whether the required torque is larger than a preset switching torque, if not, switching the parallel driving mode into a series driving mode, wherein the series driving mode is more oil-saving than the parallel driving mode due to the characteristic of a P1+ P3 structure; if the required torque is larger than the preset switching torque, the required torque is proved to be large at the moment, the engine and the driving motor are required to provide torque for the vehicle together, but if the battery pack discharges under the condition of low electric quantity, the battery pack is damaged, in order to protect the battery pack, whether the electric quantity of the battery pack is smaller than Vf or not is judged, vf is a specific standard quantity and is determined according to actual characteristics of the vehicle, the value is generally smaller, when the electric quantity of the battery pack is lower than a limit value Vf, the power is sacrificed in order to protect the battery pack at the moment, the parallel driving mode is forcibly exited, a series power generation mode is entered, if the electric quantity of the battery pack is higher than the limit value Vf, the battery pack has output capacity, the parallel mode is maintained at the moment, the engine is controlled to operate according to a maximum power curve LVmax to output a first torque, the battery pack discharges to the driving motor to output a second torque, the whole vehicle torque is met through the first torque and the second torque, the electric quantity of the battery pack is in the parallel discharging mode, the battery electric quantity of the battery continuously decreases, and the ratio of the first torque and the second torque can be preset.

The method comprises the steps that when a vehicle enters a parallel driving mode, an accelerator pedal signal of the vehicle and state information of the vehicle are obtained; determining a required torque of the vehicle according to the accelerator pedal signal; and determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy. According to the embodiment, when the vehicle enters the parallel driving mode, the required torque of the vehicle is determined according to the accelerator pedal signal of the vehicle, the driving strategy in the parallel mode is determined according to the state information and the required torque of the vehicle, the vehicle is driven to run according to the driving strategy, the driving strategy can be determined according to the required torque and the state information of the vehicle, the technical problem that the fuel consumption is high due to inaccurate control mode of the vehicle in the parallel driving mode is solved, and the fuel consumption of the vehicle is reduced.

Referring to fig. 4, fig. 4 is a flowchart illustrating a parallel driving control method for a hybrid vehicle according to a second embodiment of the present invention.

Based on the first embodiment described above, in the present embodiment, the step S32 includes:

step S321: and when the preset torque interval is an economic torque interval, judging whether the electric quantity of the battery is smaller than a first preset electric quantity threshold value.

It is understood that when the required torque is in the economic torque range, the fuel consumption economy of the vehicle is highest; if the required torque is in the economic torque interval, the required torque corresponding to the accelerator pedal signal is not very large or very small, and is determined by the characteristics of the hybrid vehicle with the P1+ P3 structure, so that the parallel driving mode is more fuel-saving and economical.

Step S322: and if so, controlling an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque.

It can be understood that, when the battery power is less than the first preset power threshold, it indicates that the battery pack is in the forced power generation region, and it is necessary to supplement power to the battery pack, at this time, the torque output by the engine according to the maximum power curve is divided into two parts, one part is the first driving torque for driving the vehicle to run, and the other part is the first power generation torque for charging the battery pack through the driving motor.

Step S323: and charging a battery pack through the first power generation torque, and driving the vehicle to run through the first driving torque.

In the specific implementation, when the required torque is in an economic torque interval, whether the battery electric quantity is smaller than a first electric quantity threshold value or not is judged, if yes, the battery pack is in a forced power generation area, the engine is controlled to operate according to a maximum power curve, a first driving torque for driving the vehicle to operate and a first driving torque for charging the battery pack through the driving motor are output, and the ratio of the first driving torque to the first power generation torque can be preset.

Further, in order to protect the battery pack, after determining whether the battery power is less than a first preset power threshold, the method further includes: if not, judging whether the electric quantity of the battery is smaller than a second preset electric quantity threshold value, wherein the second preset electric quantity threshold value is larger than the first preset electric quantity threshold value; if so, controlling an engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second generating torque; and charging the battery pack through the second power generation torque, and driving the vehicle to run through the second driving torque.

In specific implementation, when the electric quantity of the battery is larger than a first preset electric quantity threshold value, whether the electric quantity of the battery is smaller than a second electric quantity threshold value is judged, if yes, the battery pack is in a priority power generation area, power generation is preferentially considered at the moment, NVH and drivability are secondarily considered, the engine is controlled to operate according to a power priority curve, a second driving torque for driving the vehicle to run and a second power generation torque for charging the battery pack through the driving motor are output, and the ratio of the second driving torque to the second power generation torque can be preset.

Further, in order to maintain the electric quantity of the battery pack in a high state, after determining whether the electric quantity of the battery is smaller than a second preset electric quantity threshold, the method further includes: if not, determining compensation power according to a third preset electric quantity threshold value, a compensation electric quantity threshold value and the battery electric quantity, wherein the third preset electric quantity threshold value is larger than the second preset electric quantity threshold value; obtaining an engine rotating speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine rotating speed value; controlling an engine of the vehicle to output the required torque and the compensation torque; and charging the battery pack through the compensation torque, and driving the vehicle to run through the required torque.

It is understood that the compensation power may be a power for slightly charging the battery pack, the compensation charge threshold is smaller than the third preset charge threshold, and the charging of the battery pack in this embodiment is to maintain the charge of the battery pack between the compensation charge threshold and the third preset charge threshold; determining the compensation power according to the third preset electric quantity threshold, the compensation electric quantity threshold and the battery electric quantity may be determining the compensation power according to the third preset electric quantity threshold, the compensation electric quantity threshold and the battery electric quantity by a first formula; determining a compensation torque based on the compensation power and the engine speed value may be determining a compensation torque based on the compensation power and the engine speed value via a second formula; the first formula and the second formula are as follows:

in the formula, p is compensation power; vb is a third preset electric quantity threshold value; vl is a compensation electric quantity threshold; k is the maximum compensation power;

in the formula, T is compensation torque; the rpm is the engine speed value.

In specific implementation, with reference to fig. 3, when the required torque is in an economic torque interval, judging whether the battery power is lower than Vf, if the battery power is lower than Vf, keeping a parallel connection mode, but the engine runs according to a maximum power curve LVmax, and at the moment, the engine is in a parallel connection charging mode, driving the vehicle to run by using a first driving torque output by the engine, outputting a first power generation torque to quickly supplement power to a battery pack through energy recovery of a driving motor, increasing the battery power to reserve energy for the battery pack at the fastest speed, if the battery power is not lower than Vf, judging whether the battery power is lower than Vg, if so, judging that the battery power is lower at the moment, still keeping the parallel connection mode, controlling the engine to run according to a power priority curve LVg, outputting a second driving torque by the engine to drive the vehicle to run, and outputting a second power generation torque to quickly charge the battery pack through the driving motor; if the battery power is higher than Vg, the battery power is proved to be sufficient at the moment, a parallel direct-drive mode is adopted, and the output torque of the engine is =The method comprises the steps that most of torque output by an engine is used for driving a vehicle, less torque is converted into electric energy through a motor and is used for providing power for other electric appliances of the vehicle and slightly charging a battery pack, the electric quantity of the battery pack is maintained between a high electric quantity state Vl and a high electric quantity state Vb, the compensation torque does not need to be too large, generally speaking, a conversion success rate is calculated, and if the maximum compensation power is 15kw, the compensation power p and the compensation torque T determined according to the compensation power p are respectively:

in this embodiment, when the preset torque interval is an economic torque interval, whether the battery power is smaller than a first preset power threshold is determined; if so, controlling an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque; and charging a battery pack through the first power generation torque, and driving the vehicle to run through the first driving torque. When the required torque is in the economic torque interval and the electric quantity of the battery is smaller than a first preset electric quantity threshold value, the engine is controlled to output a first driving torque according to a maximum power curve to drive the vehicle to run, and output a first generating torque to charge the battery pack, so that the fuel consumption of the vehicle can be reduced, and the battery pack can be protected.

Furthermore, an embodiment of the present invention also provides a storage medium having a hybrid vehicle parallel drive control program stored thereon, where the hybrid vehicle parallel drive control program, when executed by a processor, implements the steps of the hybrid vehicle parallel drive control method as described above.

Referring to fig. 5, fig. 5 is a block diagram showing the configuration of the parallel drive control apparatus for a hybrid vehicle according to the first embodiment of the present invention.

As shown in fig. 5, the parallel drive control device for a hybrid vehicle according to the embodiment of the present invention includes:

the system comprises an acquisition module 10, a control module and a control module, wherein the acquisition module is used for acquiring an accelerator pedal signal of a vehicle and state information of the vehicle when the vehicle enters a parallel driving mode;

a determination module 20 for determining a required torque of the vehicle from the accelerator pedal signal;

and the driving module 30 is used for determining a driving strategy according to the state information and the required torque and driving the vehicle to run according to the driving strategy.

A second embodiment of the parallel drive control device for a hybrid vehicle according to the present invention is proposed based on the first embodiment of the parallel drive control device for a hybrid vehicle according to the present invention.

In this embodiment, the driving module 30 is further configured to determine a preset torque interval where the required torque is located, and determine the battery capacity of the vehicle according to the state information; and determining a driving strategy according to the preset torque interval and the battery electric quantity, and driving the vehicle to run according to the driving strategy.

The driving module 30 is further configured to determine whether the required torque is greater than a preset switching torque when the preset torque interval is a high torque interval; if so, judging whether the electric quantity of the battery is smaller than a first preset electric quantity threshold value; and if so, controlling the vehicle to exit the parallel driving mode, and controlling the vehicle to enter the series driving mode to drive the vehicle to run.

The driving module 30 is further configured to control an engine of the vehicle to operate according to a maximum power curve to output a first torque and control a driving motor of the vehicle to output a second torque if the driving module is not used for driving the vehicle to output the second torque; and driving the vehicle to run by the first torque and the second torque.

The driving module 30 is further configured to determine whether the battery power is smaller than a first preset power threshold when the preset torque interval is an economic torque interval; if so, controlling an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque; and charging a battery pack through the first power generation torque, and driving the vehicle to run through the first driving torque.

The driving module 30 is further configured to determine whether the battery power is less than a second preset power threshold if the battery power is not less than the first preset power threshold; if so, controlling an engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second generating torque; and charging the battery pack through the second power generation torque, and driving the vehicle to run through the second driving torque.

The driving module 30 is further configured to determine, if the battery power is not in the first preset power threshold, a compensation power threshold, and the battery power, where the compensation power is determined according to a third preset power threshold, and the third preset power threshold is greater than the second preset power threshold; acquiring an engine rotating speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine rotating speed value; controlling an engine of the vehicle to output the required torque and the compensation torque; and charging the battery pack through the compensation torque, and driving the vehicle to run through the required torque.

Other embodiments or specific implementation manners of the hybrid vehicle parallel drive control device of the invention can refer to the above method embodiments, and are not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a rom/ram, a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

1. A hybrid vehicle parallel drive control method, characterized by comprising:

2. The method according to claim 1, wherein the determining a driving strategy according to the state information and the required torque, and driving the vehicle to run according to the driving strategy, comprises:

3. The method of claim 2, wherein the determining a driving strategy according to the preset torque interval and the battery level and driving the vehicle to run according to the driving strategy comprises:

4. The method of claim 3, wherein after determining whether the battery charge level is less than a first predetermined charge level threshold, further comprising:

and driving the vehicle to run by the first torque and the second torque.

5. The method according to claim 2, wherein the determining a driving strategy according to the preset torque interval and the battery power and driving the vehicle to run according to the driving strategy comprises:

when the preset torque interval is an economic torque interval, judging whether the battery electric quantity is smaller than a first preset electric quantity threshold value;

6. The method of claim 5, wherein after determining whether the battery charge level is less than a first predetermined charge level threshold, further comprising:

7. The method of claim 6, wherein after determining whether the battery charge level is less than a second predetermined charge level threshold, further comprising:

acquiring an engine rotating speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine rotating speed value;

8. A hybrid vehicle parallel drive control apparatus, characterized by comprising:

a determination module for determining a required torque of the vehicle from the accelerator pedal signal;

9. A hybrid vehicle parallel drive control apparatus, characterized by comprising: a memory, a processor and a hybrid vehicle parallel drive control program stored on the memory and executable on the processor, the hybrid vehicle parallel drive control program being configured to implement the steps of the hybrid vehicle parallel drive control method according to any one of claims 1 to 7.

10. A storage medium having a hybrid vehicle parallel drive control program stored thereon, the hybrid vehicle parallel drive control program, when executed by a processor, implementing the steps of the hybrid vehicle parallel drive control method according to any one of claims 1 to 7.