CN116857078A

CN116857078A - Engine start-stop control method and device, electronic equipment and storage medium

Info

Publication number: CN116857078A
Application number: CN202310929287.5A
Authority: CN
Inventors: 张伟男; 于跃; 谷鸣宇; 刘畅; 王林国; 赫建勇; 杨启; 贾玉哲; 张国栋; 汪志坚; 赵强; 李丽
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2023-10-10

Abstract

The invention discloses a control method and device for starting and stopping an engine, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring at least one piece of vehicle related information of a target vehicle, and determining a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information; when a mode switching instruction corresponding to a current vehicle mode is received, determining an engine start-stop mode corresponding to a target vehicle; the engine of the target vehicle is controlled to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode. The problem of the engine start-stop in-process because of the travelling comfort that the moment of torsion changes is not high is solved, the effect that keeps the engine to be in high-efficient economy interval all the time, guarantees the engine on the basis of reasonable start-stop opportunity simultaneously, improves the travelling comfort of the engine of target vehicle in-process of start-stop is realized.

Description

Engine start-stop control method and device, electronic equipment and storage medium

Technical Field

The present invention relates to the field of automobile control technologies, and in particular, to a method and apparatus for controlling start and stop of an engine, an electronic device, and a storage medium.

Background

For hybrid vehicles, hybrid energy management and coordinated control of the two power sources are critical to affecting vehicle economy and power performance.

At present, energy management and power source switching of a hybrid vehicle are mainly focused on economic researches, but power response problems during power source switching of the vehicle are ignored, so that when the power source switching is performed, comfort in driving of the vehicle is seriously affected due to torque changes caused during starting or stopping of an engine.

In order to solve the above-described problems, an improvement in a control method of engine start-stop of a vehicle is required.

Disclosure of Invention

The invention provides a control method, a device, electronic equipment and a storage medium for starting and stopping an engine, which are used for solving the problem that a target vehicle is low in comfort caused by torque change in the starting and stopping process of the engine.

In a first aspect, an embodiment of the present invention provides a method for controlling start and stop of an engine, including:

acquiring at least one piece of vehicle related information of a target vehicle, and determining a current vehicle mode corresponding to the target vehicle according to at least one piece of vehicle related information;

when a mode switching instruction corresponding to the current vehicle mode is received, determining an engine start-stop mode corresponding to the target vehicle;

And controlling the engine of the target vehicle to start and stop based on an engine start and stop method corresponding to the engine start and stop mode.

In a second aspect, an embodiment of the present invention further provides a control device for starting and stopping an engine, including:

the vehicle mode determining module is used for acquiring at least one piece of vehicle related information of a target vehicle and determining a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information;

a start-stop mode determining module configured to determine an engine start-stop mode corresponding to the target vehicle when a mode switching instruction corresponding to the current vehicle mode is received;

and the control module is used for controlling the engine of the target vehicle to start and stop based on an engine start and stop method corresponding to the engine start and stop mode.

In a third aspect, an embodiment of the present invention further provides an electronic device, including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the engine start-stop control method of any one of the embodiments of the present invention.

In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, where a computer instruction is stored, where the computer instruction is configured to cause a processor to execute the method for controlling start and stop of an engine according to any one of the embodiments of the present invention.

According to the technical scheme, at least one piece of vehicle related information of the target vehicle is obtained, and a current vehicle mode corresponding to the target vehicle is determined according to the at least one piece of vehicle related information; when a mode switching instruction corresponding to a current vehicle mode is received, determining an engine start-stop mode corresponding to a target vehicle; the engine of the target vehicle is controlled to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode. In practical application, in order to improve the comfort of the target vehicle in the process of switching the engine start and stop, when the target vehicle needs to switch the current vehicle mode, the engine start and stop mode of the target vehicle is first determined, and then the engine start and stop mode corresponding to the engine start and stop mode is invoked to control the engine start or stop of the target vehicle. In the process, the engine is reasonably controlled to start and stop by judging the start and stop time of the engine of the target vehicle, so that the problem that the comfort of the target vehicle is low due to torque change in the start and stop process of the engine is solved, the effect that the engine is always in a high-efficiency economic interval is realized, the engine is ensured to be at the reasonable start and stop time, and the comfort of the engine of the target vehicle in the start and stop process is improved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for controlling engine start-stop according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a hybrid power system according to a first embodiment of the present invention;

FIG. 3 is a flow chart of a method for determining a current vehicle mode of a target vehicle according to a first embodiment of the present invention;

fig. 4 is a flowchart of a control method for engine start-stop according to a second embodiment of the present invention;

fig. 5 is a flowchart of an engine start control method according to a second embodiment of the present invention;

Fig. 6 is a flowchart of an engine stop control method according to a second embodiment of the present invention;

fig. 7 is a block diagram of a control device for engine start-stop according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of an electronic device implementing a control method of engine start-stop according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Example 1

Fig. 1 is a flowchart of an engine start-stop control method according to an embodiment of the present invention, where the method may be performed by an engine start-stop control device, and the engine start-stop control device may be implemented in hardware and/or software, and the engine start-stop control device may be configured in a computing device that may perform the engine start-stop control method, by determining a start-stop timing of an engine during a vehicle mode switching process, and controlling a target vehicle to actually control the engine start-stop at a suitable start-stop to improve comfort of the target vehicle during the engine start-stop.

As shown in fig. 1, the method includes:

s110, acquiring at least one piece of vehicle related information of the target vehicle, and determining a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information.

The target vehicle is understood to be a hybrid vehicle having an electric drive mode and an engine drive mode, that is, the target vehicle has two power sources, one of which is electric power and motor drive, and the other of which is fuel and engine drive. The vehicle-related information may be understood as vehicle running information for determining a vehicle mode used by the target vehicle at the present time. It is to be understood that since the target vehicle has two power sources, in practical applications, the vehicle modes of the target vehicle can be classified into three main types, i.e., an engine drive mode, a pure electric drive mode, and a hybrid drive mode. The current vehicle mode refers to a vehicle mode in which the target vehicle is in use at the current time.

In the technical scheme, a hybrid power system is often installed in a target vehicle, and the hybrid power system comprises a whole vehicle controller HCU, an engine controller ECU, a transmission controller TCU, a motor controller MCU, an engine, a clutch, a motor, an AMT (automated mechanical transmission), a main speed reducer and driving wheels. As shown in fig. 2, the whole vehicle controller HCU may be in communication interconnection with the engine controller ECU, the transmission controller TCU, and the motor controller MCU to perform mutual data transmission, and the transmission controller TCU may also be in direct communication interconnection with the engine controller ECU and the motor controller MCU to perform mutual data transmission. The engine, the clutch, the motor, the transmission and the main speed reducer are arranged on the same axis, the clutch comprises a driving end and a driven end, the driving end of the clutch is connected with an output shaft of the engine, the driven end of the clutch is connected with an input shaft of the motor, and the engine comprises a starter which can start the engine.

For hybrid vehicles, there is a large difference in energy conversion efficiency and power response speed of the two power sources, and therefore, energy management for hybrid vehicles and coordinated control of the two power sources are key to affecting vehicle economy and power performance. In addition, during the running process of the hybrid vehicle, due to the comprehensive effects of the battery state of charge change or the driver driving intention and other factors, the hybrid system can be switched back and forth among an engine driving mode, a pure electric driving mode and a hybrid driving mode, and during the switching process of different vehicle modes, the control process of starting and closing the engine can be involved. For example, switching from an electric-only drive mode to a hybrid drive mode requires starting the engine during travel, and the impact of the engine from torque changes during standstill to start is a major factor affecting comfort during mode switching.

Based on this, in the present technical solution, it is necessary to determine the current vehicle mode according to at least one piece of vehicle related information of the target vehicle, so as to control the start or close of the engine when the target vehicle needs to switch the vehicle modes, thereby reducing the influence of the target vehicle on the comfort of the riding user during the vehicle mode switching process.

Optionally, obtaining at least one piece of vehicle related information of the target vehicle, and determining a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information, including: acquiring at least one piece of vehicle related information of a target vehicle, and determining the engine required power of the target vehicle based on the at least one piece of vehicle related information; and determining a current vehicle mode corresponding to the target vehicle according to the engine required power, the engine torque and the battery residual quantity of the target vehicle.

The vehicle-related information includes at least one of a battery remaining power, a vehicle speed, an accelerator pedal signal, a brake pedal signal, a grade signal, a battery remaining power threshold, an engine torque demand, and vehicle attribute information. Engine demand power may be understood as the power of the motive power provided by the engine required to accelerate the target vehicle, or the power of the resistance provided by the engine required to overcome the target vehicle when decelerating.

Specifically, at least one vehicle-related information associated with the target vehicle is acquired based on at least one vehicle controller in the target vehicle, and an engine demand power corresponding to the target vehicle is calculated according to the at least one vehicle-related information. Further, determining a current vehicle mode corresponding to the target vehicle according to the engine demand power, the engine torque and the battery remaining power of the target vehicle includes: if the engine demand power is greater than zero and less than the engine demand power threshold, determining a current vehicle mode of the target vehicle according to the battery residual capacity and the residual capacity threshold; or if the engine demand power is greater than the engine demand power threshold, determining a current vehicle mode corresponding to the target vehicle according to an engine torque section corresponding to the engine demand torque of the target vehicle.

The current vehicle mode includes an engine drive mode, an electric-only drive mode, or a hybrid drive mode, among others.

In practical application, when determining a current vehicle mode corresponding to a target vehicle, firstly comparing the engine demand power of the target vehicle, and if the engine demand power is greater than zero and smaller than an engine demand power threshold, determining the current vehicle mode corresponding to the target vehicle according to the battery residual capacity and the residual capacity threshold. And if the engine demand power is greater than the engine demand power threshold, determining a current vehicle mode corresponding to the target vehicle according to an engine torque section corresponding to the engine demand torque of the target vehicle.

In a specific example, as shown in fig. 3, the engine demand power Pn corresponding to the target vehicle is obtained according to at least one vehicle related information of the target vehicle, and the magnitude relation between the engine demand power Pn and the engine power threshold Pm is compared to determine whether the engine power in the target vehicle can meet the normal use of the target vehicle.

If 0< Pn is less than or equal to Pm, comparing the residual capacity of the battery in the target vehicle with a residual capacity threshold, wherein the preset residual capacity threshold comprises an upper residual capacity threshold A and a lower residual capacity threshold B. Because the engine needs less power at this time, the vehicle is generally in a starting or low-speed state, the thermal efficiency of the engine is low, and when the residual electric power is sufficient, the engine should be turned off, and the motor direct drive mode is entered, that is, all the demands are provided by the motor alone, that is, the electric-only drive mode. On this basis, if SOC < a, determining that the current vehicle mode is an engine drive mode (i.e., an engine-driven-motor power generation mode); if the SOC is greater than or equal to A, the current vehicle mode is determined to be an electric-only drive mode (i.e., a motor-alone drive mode).

If Pn is less than or equal to 0 and SOC is less than B, the target vehicle is indicated to enter a braking energy recovery mode, the motor works in an engine mode to charge the battery pack, and the current vehicle mode of the target vehicle is an engine driving mode (namely, the braking energy recovery mode).

If Pn > Pm and SOC < a, the target vehicle enters an engine driving motor power generation mode, i.e., enters a driving charging mode, and the engine provides additional torque to drive the engine to generate power so as to maintain balance of residual electric power, and at this time, the current vehicle mode corresponding to the target vehicle is an engine driving mode (i.e., an engine driving motor power generation mode).

If Pn > Pm and SOC > B, the current vehicle mode of the target vehicle is the hybrid drive mode (i.e., common drive mode).

If Pn is greater than Pm and A is less than or equal to SOC and less than or equal to B, calculating the engine demand torque Tn of the target vehicle, wherein under the electric quantity, a motor in the target vehicle can drive and generate power and can assist in engine driving, and in order to meet the requirement that the engine is in a high-efficiency torque section, the current vehicle mode needs to be determined according to the engine torque section corresponding to the engine demand torque.

Specifically, if Tn > TB, then the current vehicle mode of the target vehicle is the hybrid drive mode (i.e., common drive mode) and insufficient engine torque is provided by the electric machine. If TA is less than or equal to Tn is less than or equal to TB, the current vehicle mode corresponding to the target vehicle is an engine driving mode (namely, an engine independent driving mode), namely, when the engine is in the optimal torque range, the engine direct driving mode is entered, and all required power is provided by the engine. If Tn < TA, the current vehicle mode of the target vehicle is an engine driving mode (namely, an engine driving motor power generation mode), and the vehicle enters a driving charging mode, and the engine provides additional torque to drive the motor to generate power, so that the balance of the residual electric quantity is maintained.

S120, when a mode switching instruction corresponding to the current vehicle mode is received, determining an engine start-stop mode corresponding to the target vehicle.

The mode switching command may be understood as a control command for switching the current vehicle mode of the target vehicle, for example, a control command for switching the electric-only driving mode to the hybrid driving mode. The engine start-stop mode may be understood as an operation mode that controls the start or shut-down of an engine of a target vehicle.

In practical applications, the target vehicle may need to switch the current vehicle mode during running, and when a mode switching instruction is received, an engine start mode corresponding to the target vehicle needs to be determined to start or stop the engine based on the determined engine start-stop mode in order to reduce the influence on the comfort of a riding user during switching. For example, when it is necessary to switch the target vehicle from the electric-only drive mode to the hybrid drive mode, it is necessary to control the target vehicle to start the engine and synchronize the engine speed and the transmission input shaft speed; the side needs to control the target vehicle to close the engine and open the clutch when the target vehicle is to be switched from the hybrid drive mode to the electric-only drive mode.

S130, controlling the engine of the target vehicle to start and stop based on an engine start and stop method corresponding to the engine start and stop mode.

Example two

Fig. 4 is a flowchart of a method for controlling start and stop of an engine according to a second embodiment of the present invention, where, optionally, when a mode switching command corresponding to a current vehicle mode is received, an engine start and stop mode corresponding to a target vehicle is determined; the engine of the target vehicle is controlled to perform start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode to refine.

As shown in fig. 4, the method includes:

s210, acquiring at least one piece of vehicle related information of the target vehicle, and determining a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information.

S220, when a mode switching instruction is received, determining whether the mode switching instruction is a first mode switching instruction, if so, executing S230, and if not, executing S240.

The technical scheme comprises a first mode switching instruction and a second mode switching instruction.

The first mode switching command may be understood as a command to switch the electric-only drive mode to the hybrid drive mode. The second mode switching instruction refers to switching the hybrid drive mode to the electric-only drive mode. When the first mode switching command is received, the target vehicle needs to be controlled to start the engine, and when the second mode switching command is received, the target vehicle needs to be controlled to shut down the engine.

Specifically, when the first mode switching instruction is received, S230 is executed to control the target vehicle to start the engine, and when the second mode instruction is received, S234 is executed to control the target vehicle to shut down the engine.

And S230, when the first mode switching instruction is received, determining that the engine start-stop mode of the target vehicle is the engine start-up mode, and controlling the engine start of the target vehicle based on an engine start-stop method corresponding to the engine start-up mode.

The first mode switching instruction is a switching instruction for switching the current vehicle mode from the electric-only driving mode to the hybrid driving mode.

Specifically, when the first mode switching instruction is received, the first mode switching instruction indicates that the current vehicle mode of the target vehicle needs to be switched from the electric-only driving mode to the hybrid driving mode, and accordingly, the engine start-stop mode of the target vehicle is the engine start mode, and at this time, the target vehicle needs to be controlled to start the engine.

Optionally, controlling the engine of the target vehicle to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode includes: if the engine start-stop mode is the engine start-up mode, acquiring first vehicle running information of the target vehicle; when all the first vehicle running information meets the corresponding first running information detection conditions, determining the target engine speed corresponding to the target vehicle; the engine of the target vehicle is started based on the target engine speed.

The first vehicle operation information includes at least one of an engine required power Pn, a battery remaining capacity SOC, a battery temperature t, a high-voltage system operation signal error, a required power margin δ, and a battery remaining capacity margin β.

It should be noted that, setting the required power margin δ and the battery remaining capacity margin β in the present technical solution may reserve sufficient buffer space for the engine starting and closing process, so as to avoid frequent starting and stopping of the engine.

Specifically, as shown in fig. 5, it may be determined whether or not the motor of the target vehicle is sufficient to drive the target vehicle by comparing the engine required power Pn and the motor power threshold Pm. It is determined whether the electric quantity of the target vehicle is sufficient to drive the target vehicle by comparing the battery remaining electric quantity SOC and the upper limit remaining electric quantity threshold a. Whether the battery of the target vehicle is in a low-temperature overdischarge state or a high-temperature dangerous state is judged by comparing the battery temperature t and the battery temperature thresholds tx and ty. And judging whether the target vehicle triggers the high-voltage system fault or not by comparing the error value of the high-voltage fault signal.

In practical applications, when Pn > pm+δ, or SOC < a- β, or t > ty or t < tx, or error=1, the start-up engine program is started, at which time the electronic controller unit (Electronic Control Unit) and the automatic transmission control unit (Transmission Control Unit, TCU) are controlled by the hybrid system vehicle controller (Hybrid Control Unit, HCU) to start the engine. Further, the TCU confirms that the clutch of the target vehicle is in an open state, and calculates a target engine speed of the target vehicle by the TCU and informs the ECU.

Specifically, determining the target engine speed corresponding to the target vehicle includes: determining an idle speed of an engine corresponding to a target vehicle and a target gear synchronous speed of a transmission of the target vehicle; and determining the maximum rotation speed of the idle rotation speed of the engine and the target gear synchronous rotation speed as the target rotation speed of the engine corresponding to the target vehicle.

On the basis, the TCU controls the clutch to enter a pre-combination state, wherein the state is a point near a clutch grinding point but not affecting the motor rotating speed, and meanwhile, the ECU controls the target vehicle to start the engine and adjusts the engine rotating speed according to the target engine rotating speed transmitted by the TCU. Generally, the difference between the rotational speeds of the engine and the motor is smaller than a certain speed difference limit, and is generally set to 10rpm-100rpm. Further, when the difference between the rotational speeds of the engine and the motor is smaller than the speed difference limit value, the clutch is combined, the TCU reports the position of the clutch to the HCU, and the HCU confirms that the engine is started.

Further, the engaging clutch can be set at different engaging speeds according to the clutch synchronization capability and the rotational speed difference, so as to ensure quick and comfortable engagement and avoid fluctuation of torque of the transmission chain caused by the engagement of the clutch.

S240, when the second mode switching instruction is received, determining that the engine start-stop mode of the target vehicle is the engine stop mode, and controlling the engine stop of the target vehicle based on an engine start-stop method corresponding to the engine stop mode.

The second mode switching instruction is a switching instruction for switching the current vehicle mode from the hybrid driving mode to the electric-only driving mode.

Specifically, when the second mode switching instruction is received, the second mode switching instruction indicates that the current vehicle mode of the target vehicle needs to be switched from the hybrid driving mode to the electric-only mode, and accordingly, the engine start-stop mode of the target vehicle is the engine stop mode, and the target vehicle needs to be controlled to be turned off.

Optionally, controlling the engine of the target vehicle to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode includes: if the engine start-stop mode is the engine stop mode, acquiring second vehicle running information of the target vehicle; determining total required torque and engine torque of the target vehicle based on the at least one second vehicle running information, and determining a torque reduction demand of the engine of the target vehicle at the at least one torque reduction time according to the total required torque and the engine torque; determining a current motor torque of the target vehicle based on the torque reduction demand; when the current motor torque is equal to the total required torque, the engine operation of the target vehicle is stopped.

Wherein the second vehicle operation information includes at least one of an engine demand power, a battery remaining capacity, a demand power margin, and a battery remaining capacity margin.

Specifically, as shown in fig. 6, the engine demand power Pn, the motor power threshold Pm, the battery remaining capacity SOC, the upper limit remaining capacity threshold a, the demand power margin δ, the battery remaining capacity margin α, and the like are read. It can be judged whether or not the motor of the target vehicle is sufficient to drive the target vehicle by comparing Pn and Pm; it can be determined whether the remaining power of the target vehicle is sufficient to drive the target vehicle by comparing the SOC with the upper remaining power threshold a.

It should be noted that, setting the required power margin δ and the battery remaining capacity margin α in the present technical solution may reserve sufficient buffer space for the engine starting and closing process, so as to avoid frequent starting and stopping of the engine. In this technical solution, α and β may represent different battery remaining capacity margins, for example, α may represent an upper limit battery remaining capacity margin, and β may represent a lower limit battery remaining capacity margin.

On this basis, if Pn < Pm-delta, or SOC > A+alpha, the engine shutdown procedure begins. At this time, the engine is started by the HCU control ECU, TCU and micro control unit (Microcontroller Unit, MCU), and the torque down demand is determined from the total demand torque of the engine and the engine torque, such as controlling the engine torque to be unloaded to zero torque based on the ECU. Meanwhile, the current motor torque of the target vehicle is determined according to the torque reduction demand, and the motor torque is increased based on MCU control of the target vehicle to compensate for the change of the engine torque, so that the total torque is maintained to meet the total demand torque.

Further, the clutch is controlled to open to the total required torque to the target torque position (i.e., engine torque 0) based on the TCU, and it is determined whether the engine torque is less than the target torque, if so, the clutch is opened to the fully open position based on the TCU, and the HCU is reported. Further, the HCU notifies the ECU of a shutdown stall, returns to the HCU after the stall is completed, and then the HCU confirms that the engine shutdown is completed. Wherein the general target torque is set to 0-50n.m.

It should be noted that opening the clutch requires setting an opening speed limit to ensure quick and comfortable opening and to avoid torque fluctuations in the drive train caused by clutch opening.

The hybrid drive mode is selected based on the motor power threshold, the battery residual capacity threshold and the engine high-efficiency torque threshold, the hybrid drive mode is judged by using the engine required power and the SOC dual signals, and the engine high-efficiency torque threshold is introduced, so that the power performance requirement is ensured, the engine is ensured to always work in a high-efficiency economic interval, and the economical efficiency is improved.

In addition, four signals (namely, the engine demand torque, the battery residual capacity, the battery temperature and the high-voltage system fault signal value) are used for judging and determining the engine starting time, two signals (namely, the engine demand power and the battery residual capacity) are used for judging and determining the engine stopping time, and meanwhile, the starting and stopping margin is set to reserve sufficient buffer space for the engine starting and stopping process, so that the influence of frequent starting and stopping of the engine on economy and comfortableness is avoided.

Finally, in the starting and stopping processes, the whole vehicle controller HCU is used for integrally dispatching, TCU, ECU, MCU is used for coordinating actions, the starting process is fast and efficient through the pre-combination of the TCU control clutch, and the vehicle torque stable transition in the stopping process is ensured through the motor torque compensation controlled by the MCU and the balance torque adjustment controlled by the TCU control clutch.

The method for controlling the start-stop time and the start-stop time of the hybrid engine is comprehensively adopted, and good economical efficiency, dynamic performance and comfort effect are achieved.

Example III

Fig. 7 is a schematic structural diagram of an engine start-stop control device according to a third embodiment of the present invention. As shown in fig. 7, the apparatus includes: a vehicle mode determination module 310, a start-stop mode determination module 320, and a control module 330.

The vehicle mode determining module 310 is configured to obtain at least one piece of vehicle related information of the target vehicle, and determine a current vehicle mode corresponding to the target vehicle according to the at least one piece of vehicle related information;

a start-stop mode determining module 320, configured to determine an engine start-stop mode corresponding to a target vehicle when a mode switching instruction corresponding to a current vehicle mode is received;

the control module 330 is configured to control an engine of the target vehicle to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode.

Optionally, the vehicle mode determining module includes: the power determining unit is used for acquiring at least one piece of vehicle related information of the target vehicle and determining the engine required power of the target vehicle based on the at least one piece of vehicle related information; the vehicle related information comprises at least one of battery residual capacity, vehicle speed, accelerator pedal signals, brake pedal signals, gradient signals, battery residual capacity threshold values, engine torque requirements and vehicle attribute information;

and a vehicle mode determining unit for determining a current vehicle mode corresponding to the target vehicle according to the engine demand power, the engine torque and the battery remaining power of the target vehicle.

Optionally, the vehicle mode determining unit includes: a first determining subunit, configured to determine, if the engine required power is greater than zero and less than the engine required power threshold, a current vehicle mode of the target vehicle according to the remaining battery power and the remaining power threshold; or (b)

The second determining subunit is used for determining a current vehicle mode corresponding to the target vehicle according to an engine torque interval corresponding to the engine required torque of the target vehicle if the engine required power is greater than the engine required power threshold; the current vehicle mode includes an engine drive mode, an electric-only drive mode, or a hybrid drive mode, among others.

Optionally, the start-stop mode determining module includes: a start mode determining unit configured to determine, when receiving a first mode switching instruction, that an engine start-stop mode of the target vehicle is an engine start mode; the first mode switching instruction is a switching instruction for switching the current vehicle mode from a pure electric driving mode to a hybrid driving mode; or (b)

A stop mode determining unit configured to determine that an engine start-stop mode of the target vehicle is an engine stop mode when the second mode switching instruction is received; the second mode switching instruction is a switching instruction for switching the current vehicle mode from the hybrid driving mode to the electric-only driving mode.

Optionally, the control module includes: the first vehicle operation information determining unit is used for acquiring first vehicle operation information of the target vehicle if the engine start-stop mode is the engine start mode; the first vehicle operation information comprises at least one of engine required power, battery residual capacity, battery temperature, a high-voltage system operation signal, a required power margin and a battery residual capacity margin;

an engine speed determining unit, configured to determine a target engine speed corresponding to the target vehicle when all the first vehicle operation information satisfies the corresponding first operation information detection condition;

An engine starting unit for starting an engine of the target vehicle based on the target engine speed.

Optionally, the engine speed determining unit includes: a rotation speed determination subunit, configured to determine an idle rotation speed of an engine corresponding to a target vehicle and a target gear synchronous rotation speed of a transmission of the target vehicle;

and the engine speed determination subunit is used for determining the maximum speed in the idle speed and the target gear synchronous speed of the engine as the target engine speed corresponding to the target vehicle.

Optionally, the control module includes: a second vehicle operation information determining unit configured to acquire second vehicle operation information of the target vehicle if the engine start-stop mode is the engine stop mode; wherein the second vehicle operation information includes at least one of an engine demand power, a battery remaining capacity, a demand power margin, and a battery remaining capacity margin;

the torque reduction demand determining unit is used for determining total demand torque and engine torque of the target vehicle based on at least one second vehicle operation information, and determining the torque reduction demand of the engine of the target vehicle at least one torque reduction time according to the total demand torque and the engine torque;

A motor torque determination unit configured to determine a current motor torque of the target vehicle based on the torque reduction demand;

and an engine stopping unit for stopping the engine operation of the target vehicle when the current motor torque is equal to the total required torque.

The control device for starting and stopping the engine provided by the embodiment of the invention can execute the control method for starting and stopping the engine provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example IV

Fig. 8 shows a schematic structural diagram of the electronic device 10 of the embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 8, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a control method for engine start-stop.

In some embodiments, the control method of engine start-stop may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the engine start-stop control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the engine start-stop control method in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

The computer program for implementing the engine start-stop control method of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A control method of engine start-stop, characterized by comprising:

2. The method of claim 1, wherein the obtaining at least one vehicle-related information of the target vehicle and determining a current vehicle mode corresponding to the target vehicle according to the at least one vehicle-related information comprises:

acquiring at least one piece of vehicle related information of a target vehicle, and determining the engine required power of the target vehicle based on at least one piece of vehicle related information; the vehicle related information comprises at least one of battery residual capacity, vehicle speed, accelerator pedal signals, brake pedal signals, gradient signals, battery residual capacity threshold values, engine torque and vehicle attribute information;

and determining a current vehicle mode corresponding to the target vehicle according to the engine required power, the engine torque and the battery residual capacity of the target vehicle.

3. The method of claim 2, wherein the determining a current vehicle mode corresponding to the target vehicle based on an engine demand power of the target vehicle, the engine torque, and the battery remaining power comprises:

if the engine required power is greater than zero and smaller than an engine required power threshold, determining a current vehicle mode of the target vehicle according to the battery residual capacity and the residual capacity threshold; or (b)

If the engine demand power is greater than the engine demand power threshold, determining a current vehicle mode corresponding to the target vehicle according to an engine torque interval corresponding to the engine demand torque of the target vehicle;

wherein the current vehicle mode includes an engine drive mode, an electric-only drive mode, or a hybrid drive mode.

4. The method of claim 1, wherein the mode switch command includes a first mode switch command and a second mode switch command, the determining an engine start-stop mode corresponding to the target vehicle when the mode switch command corresponding to the current vehicle mode is received, comprising:

when the first mode switching instruction is received, determining that an engine start-stop mode of the target vehicle is an engine start-up mode; the first mode switching instruction is a switching instruction for switching the current vehicle mode from a pure electric driving mode to a hybrid driving mode; or (b)

When the second mode switching instruction is received, determining that an engine start-stop mode of the target vehicle is an engine stop mode; the second mode switching instruction is a switching instruction for switching the current vehicle mode from a hybrid driving mode to an electric-only driving mode.

5. The method according to claim 1, wherein the controlling the engine of the target vehicle to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode includes:

if the engine start-stop mode is an engine start-up mode, acquiring first vehicle running information of the target vehicle; the first vehicle operation information comprises at least one of engine required power, battery residual capacity, battery temperature, a high-voltage system operation signal, a required power margin and a battery residual capacity margin;

when all the first vehicle running information meets the corresponding first running information detection conditions, determining a target engine speed corresponding to the target vehicle;

an engine of the target vehicle is started based on the target engine speed.

6. The method of claim 5, wherein determining a target engine speed for the target vehicle comprises:

determining an idle speed of an engine corresponding to the target vehicle and a target gear synchronous speed of a transmission of the target vehicle;

and determining the maximum rotation speed of the idle rotation speed of the engine and the target gear synchronous rotation speed as the target rotation speed of the engine corresponding to the target vehicle.

7. The method according to claim 1, wherein the controlling the engine of the target vehicle to perform a start-stop operation based on an engine start-stop method corresponding to the engine start-stop mode includes:

if the engine start-stop mode is the engine stop mode, acquiring second vehicle running information of the target vehicle; wherein the second vehicle operation information includes at least one of an engine demand power, a battery remaining capacity, a demand power margin, and a battery remaining capacity margin;

determining a total required torque and an engine torque of the target vehicle based on at least one piece of second vehicle operation information, and determining a torque reduction required amount of an engine of the target vehicle at least one torque reduction time according to the total required torque and the engine torque;

determining a current motor torque of the target vehicle based on the torque reduction demand;

and stopping the engine operation of the target vehicle when the current motor torque is equal to the total required torque.

8. An engine start-stop control device, comprising:

9. An electronic device, the electronic device comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the engine start-stop control method of any one of claims 1-7.

10. A computer readable storage medium storing computer instructions for causing a processor to execute the method of controlling start and stop of an engine according to any one of claims 1 to 7.