CN108556837B

CN108556837B - Torque control method, device and system of light mixing system

Info

Publication number: CN108556837B
Application number: CN201810274846.2A
Authority: CN
Inventors: 李洪飞; 吕登科; 吴孝勤
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2018-03-29
Filing date: 2018-03-29
Publication date: 2020-07-07
Anticipated expiration: 2038-03-29
Also published as: CN108556837A

Abstract

The invention provides a torque control method, a device and a system of a light mixing system, relating to the technical field of engine mixing, wherein the method is applied to a three-cylinder engine provided with a BSG motor and comprises the following steps: when a torque increasing request is received, calculating a torque increasing torque and the maximum available torque of the BSG motor under the current condition; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque; judging whether the maximum available torque is larger than or equal to the torque increasing torque; if so, controlling the BSG motor to output torque according to the torque increasing torque; and if not, controlling the BSG motor to output the torque according to the maximum available torque, and controlling the three-cylinder engine to output the torque according to the difference value between the target torque and the maximum available torque. According to the embodiment of the invention, the BSG motor is preferentially selected to increase the torque, and when the torque of the BSG motor can not completely meet the request, the engine is controlled to meet the request torque, so that the fuel economy can be improved.

Description

Torque control method, device and system of light mixing system

Technical Field

The invention relates to the technical field of engine hybrid, in particular to a torque control method, device and system of a light hybrid system.

Background

With the rapid development of the economic society of China, the automobile brings convenience to life of people and simultaneously provides new challenges for national energy safety and environmental protection, so that the nation pays more and more attention to energy conservation and emission reduction of the automobile and provides new oil consumption standards and emission regulations.

Many automobile manufacturers are therefore actively driving the use of three-cylinder engines to meet increasingly stringent legislative requirements by increasing turbocharging technology and reducing engine displacement, while improving fuel economy and reducing emissions while maintaining the same dynamics as conventional four-cylinder naturally aspirated engines. BSG (Belt starter generator) is added on the basis of a three-cylinder engine, is a mild hybrid technology, can optimize the working condition of the traditional gasoline and diesel engine, and improves the fuel efficiency under the conditions of idling, starting and the like.

The existing light mixing system has the problem of poor fuel economy when an engine is subjected to torque output control, and an effective solution is not provided at present.

Disclosure of Invention

In view of the above, the present invention is directed to a torque control method, device and system for a light mixing system, which can improve fuel economy by preferentially using a BSG motor to control torque.

In a first aspect, an embodiment of the present invention provides a torque control method for a soft hybrid system, which is applied to a three-cylinder engine with a BSG motor, and includes: when a torque increasing request is received, calculating a torque increasing torque and the maximum available torque of the BSG motor under the current condition; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque; judging whether the maximum available torque is larger than or equal to the torque increasing torque; if so, controlling the BSG motor to output torque according to the torque increasing torque; and if not, controlling the BSG motor to output the torque according to the maximum available torque, and controlling the three-cylinder engine to output the torque according to the difference value between the target torque and the maximum available torque.

With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the step of calculating the torque increase torque and the maximum available torque of the BSG motor in the current situation includes: subtracting the current output torque from the target torque corresponding to the torque increasing request to obtain a difference value as the torque increasing torque; the target torque and the current output torque are at the same level; and taking the difference obtained by subtracting the instantaneous output torque of the BSG motor from the theoretical maximum torque of the BSG motor under the current condition as the maximum available torque.

With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the step of controlling the three-cylinder engine to output the torque according to a difference value between the target torque and the maximum available torque includes: and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the maximum available torque by controlling and adjusting the throttle valve and/or the ignition angle.

In a second aspect, an embodiment of the present invention provides a torque control method for a soft hybrid system, which is applied to a three-cylinder engine with a BSG motor, and includes: calculating a torque reduction torque when a torque reduction request is received; the torque reduction torque is the difference value between the target torque corresponding to the torque reduction request and the current output torque; acquiring the minimum torque of a BSG motor; judging whether the minimum torque of the BSG motor is smaller than or equal to the torque reduction torque or not; if so, controlling the BSG motor to output torque according to the torque reduction torque; and if not, controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque.

With reference to the second aspect, embodiments of the present invention provide a first possible implementation manner of the second aspect, wherein the step of calculating the torque reduction torque includes: subtracting the current output torque from the target torque corresponding to the torque reduction request to obtain a difference value serving as the torque reduction torque; the target torque is at the same level as the current output torque.

With reference to the second aspect, the present invention provides a second possible implementation manner of the second aspect, wherein the step of controlling the three-cylinder engine to output the torque according to the difference between the target torque and the minimum torque includes: and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque by controlling and adjusting the throttle valve and/or the ignition angle.

In a third aspect, an embodiment of the present invention provides a torque control device for a soft hybrid system, applied to a three-cylinder engine with a BSG motor, including: the first calculation module is used for calculating torque increasing torque and the maximum available torque of the BSG motor under the current condition when a torque increasing request is received; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque; the first judgment module is used for judging whether the maximum available torque is larger than or equal to the torque increasing torque; the first output module is used for controlling the BSG motor to output torque according to the torque increasing torque if the BSG motor outputs the torque; and the second output module is used for controlling the BSG motor to output the torque according to the maximum available torque and controlling the three-cylinder engine to output the torque according to the difference value between the target torque and the maximum available torque if the BSG motor is not controlled to output the torque.

With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where the second output module is further configured to: and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the maximum available torque by controlling and adjusting the throttle valve and/or the ignition angle.

In a fourth aspect, an embodiment of the present invention provides a torque control device for a soft hybrid system, which is applied to a three-cylinder engine with a BSG motor, and includes: the second calculation module is used for calculating the torque reduction torque when the torque reduction request is received; the torque reduction torque is the difference value between the target torque corresponding to the torque reduction request and the current output torque; the acquisition module is used for acquiring the minimum torque of the BSG motor; the second judgment module is used for judging whether the minimum torque of the BSG motor is less than or equal to the torque reduction torque; the third output module is used for controlling the BSG motor to output torque according to the torque reduction torque if the BSG motor is in the torque reduction state; and the fourth output module is used for controlling the three-cylinder engine to output the torque according to the difference value of the target torque and the minimum torque if the target torque is not equal to the minimum torque.

In a fifth aspect, an embodiment of the present invention provides a torque control system of a light mixing system, including a processor, a memory, a bus, and a communication interface, where the processor, the communication interface, and the memory are connected by the bus; the memory is used for storing programs; a processor, configured to call a program stored in the memory through the bus, and execute the method provided by the first aspect or the second aspect and one of the possible implementations.

The embodiment of the invention has the following beneficial effects:

the torque control method, the device and the system of the light mixing system provided by the embodiment of the invention are applied to a three-cylinder engine provided with a BSG motor, can dynamically distribute the torque through the engine and the BSG motor, preferentially select the BSG motor to increase the torque when a torque increase request is available, and meet the torque request by controlling the engine when the torque of the BSG motor cannot completely meet the request, so that the engine can work in an economic area as much as possible, and the fuel economy can be improved.

Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a block diagram of a light mixing system according to an embodiment of the present invention;

FIG. 2 is a flowchart of a torque control method for a mild mixing system according to an embodiment of the present invention;

FIG. 3 is a flow chart of another method for torque control of the mild mixing system according to an embodiment of the present invention;

FIG. 4 is a flow chart of another method for torque control of the mild mixing system according to an embodiment of the present invention;

FIG. 5 is a block diagram of a torque control device of a soft mixing system according to an embodiment of the present invention;

fig. 6 is a block diagram illustrating a torque control apparatus of another mild mixing system according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

With the rapid development of the economic society of China, automobiles bring convenience to life of people and also present new challenges to national energy safety and environmental protection, so the nation pays more attention to energy conservation and emission reduction of automobiles, and has formally released GB 19578-. Meanwhile, the national regulations on automobile emission are becoming more and more strict, and national six standards of light vehicles, namely emission limits of pollutants for light vehicles and a measurement method (sixth stage of China), are promulgated officially released in 2016, 12, 23, and it is specified that all pollutants emitted by light vehicles sold and registered should meet the limit requirements from 2020, 7, 1. The state promotes the development and application of advanced automobile energy-saving and emission-reducing technology by continuous strict regulations and standards.

When a vehicle is designed, a vehicle enterprise generally matches a four-cylinder engine with a certain displacement according to a preset vehicle power performance index, but does not match a three-cylinder engine with the same displacement. However, the three-cylinder engine has incomparable advantages with the four-cylinder engine, for example, a group of piston connecting rod valve actuating mechanisms are omitted, so that the manufacturing cost is obviously reduced, the volume is reduced and the arrangement is easier, the mass is reduced, the friction is reduced, the fuel economy is better, and the like, so that the application of the three-cylinder engine is actively promoted.

For example, by increasing turbocharging technology and reducing engine displacement, the same dynamic performance as that of a traditional four-cylinder naturally aspirated engine is ensured, and meanwhile, the fuel economy is improved and the emission is reduced so as to meet the increasingly strict regulation requirements, but the route cannot be applied to a middle-high end car or an SUV (sports vehicle) type with larger vehicle weight which is originally matched with the four-cylinder supercharged engine. In addition, the low-speed dynamics of vehicles equipped with small-displacement turbocharged three-cylinder machines is insufficient because the turbocharging is not completely involved in the low-speed section of the engine, and the peak torque of the engine is mainly determined by the displacement of the engine. At present, no power system is available on the market, the advantages of the three-cylinder engine can be fully utilized, the defects of the three-cylinder engine can be effectively avoided, and the requirement of the power performance of an original four-cylinder supercharged engine vehicle type can be met.

Based on this, the torque control method, device and system of the light mixing system provided by the embodiment of the invention define a flexible implementation method of a four-cylinder engine, use the combination of a small-displacement three-cylinder engine and a BSG (Belt Starter Generator) motor, and simultaneously take the advantages of the three-cylinder engine and the four-cylinder engine into consideration, thereby avoiding the disadvantages of the three-cylinder engine. The economy of the three-cylinder engine can be fully utilized, and when the engine is started or stopped or has a strong power performance requirement, the BSG motor serves as the fourth cylinder of the engine to continuously output torque. The three-cylinder engine can be a supercharged three-cylinder engine or a non-supercharged three-cylinder engine.

When the traditional engine responds to torque increasing and decreasing requests of other controllers, the traditional engine can only be realized through throttle valve adjustment, ignition angle adjustment and the like, and has low ignition efficiency and poor fuel economy. Because the torque response of the BSG motor is quicker, the torque of the engine and the BSG motor is dynamically distributed, when other controllers have torque increasing and decreasing requests, the BSG motor is preferentially selected to increase or decrease the torque, and only when the torque of the BSG motor cannot completely meet the requests, the rest of the requested torque is met by the traditional method of adjusting a throttle or an ignition angle, so that the engine works in an economic area as much as possible, and the fuel economy is improved.

The details are described below by way of examples.

Example 1

Referring to the block diagram of the mild hybrid system shown in fig. 1, the main body of the system is shown including a three-cylinder engine block 10, an accessory system, and a BSG system 30.

The accessories of the accessory system are connected through a belt and can transmit power mutually, the accessories comprise a motor belt wheel 22, an engine belt wheel 25 and a motor belt 24, and the engine belt wheel 25 is rigidly connected with the crankshaft accessory side of the three-cylinder machine body 10. The BSG system 30 includes a motor body and a motor controller, and the BSG system can be used as a generator to charge the battery, and can also be used as a motor to drive other accessories and the engine to run by using the electric energy of the battery.

In the embodiment of the present invention, a 48vBSG system is taken as an example for description, and a BSG system with a higher voltage may be used. The 48v BSG motor in the embodiment of the invention needs to be matched with a 48v battery to provide electric energy for the motor; and at the same time, a DC/DC converter is required to convert the 48v voltage and the 12v voltage to charge the 12v battery of the vehicle, in which case the conventional generator of the vehicle can be eliminated.

Example 2

The embodiment of the invention provides a torque control method of a light mixing system, which is applied to a three-cylinder engine provided with a BSG motor. Referring to the flow chart of the torque control method of the mild mixing system shown in fig. 2, the driver can select whether to activate the torque assist mode, and the method of the present embodiment is executed at the time of activation, and the method includes the steps of:

step S202, when a torque increasing request is received, torque increasing torque and the maximum available torque of the BSG motor under the current condition are calculated.

The torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque, and the current output torque is the sum of the torques of the engine and the BSG motor. The torque-up torque, i.e., the torque-up value that needs to be increased again at the overall output of the system after receiving the torque-up request.

The torque increase request may come from various controllers on the vehicle that can affect the torque output, such as a controller connected to the accelerator pedal or an ESP controller. The torque increase request may carry a target torque, and a difference obtained by subtracting the current output torque from the target torque corresponding to the torque increase request is used as the torque increase torque. It should be noted that the target torque and the current output torque are in the same level, for example, the target torque and the current output torque are wheel-side torque, transmission-side torque or engine-side torque, and the target torque and the current output torque are in the same level to ensure the accuracy of the calculation.

The maximum available torque of the BSG motor under the current condition indicates how much torque the BSG motor can output again under the current working condition, and a difference obtained by subtracting the instantaneous output torque of the BSG motor from the theoretical maximum torque of the BSG motor under the current condition can be used as the maximum available torque. The theoretical maximum torque needs to be considered comprehensively by combining the power limit of the system and the condition that whether the BSG reduces the power or not.

And step S204, judging whether the maximum available torque is greater than or equal to the torque increasing torque. If yes, go to step S206; if not, step S208 is performed.

When a torque increasing request is received, the BSG motor is preferentially selected to increase the torque, or only when the torque of the BSG motor can not completely meet the request, the rest of the requested torque is met through a traditional transmitter adjusting mode. Because the duration of torque increase and torque decrease is short, the torque request does not need to be met by sacrificing ignition efficiency, and the fuel economy is better.

When the maximum available torque is greater than or equal to the torque increase torque, it means that only the BSG motor can satisfy the torque increase request, and thus only the BSG motor is used to increase the output torque; otherwise, when the BSG motor outputs the maximum available torque, the BSG clicks the full output at the moment, and then the engine is controlled to increase the torque output.

And step S206, controlling the BSG motor to output torque according to the torque increasing torque.

In this case, the torque output is increased only by the BSG motor.

And step S208, controlling the BSG motor to output torque according to the maximum available torque, and controlling the three-cylinder engine to output torque according to the difference value between the target torque and the maximum available torque.

When the BSG motor torque cannot fully meet the request, the three-cylinder engine is required to also increase the torque output. The three-cylinder engine can be controlled to output torque according to the difference between the target torque and the maximum available torque by controlling and adjusting the throttle valve and/or the ignition angle.

The torque control method of the light mixing system provided by the embodiment of the invention is applied to a three-cylinder engine provided with a BSG motor, can dynamically distribute the torque through the engine and the BSG motor, preferentially selects the BSG motor to increase the torque when a torque increase request is made, and meets the requested torque by controlling the engine when the torque of the BSG motor can not completely meet the request, so that the engine can work in an economic area as much as possible, and the fuel economy can be improved.

The embodiment of the invention provides a torque control method of a light mixing system, which is applied to a three-cylinder engine provided with a BSG motor. Referring to FIG. 3, a flow chart of a torque control method for a mild mixing system is shown, the method comprising the steps of:

in step S302, when a torque-down request is received, a torque-down torque is calculated.

The torque reduction torque is a difference value between a target torque corresponding to the torque reduction request and a current output torque, the current output torque is a current output torque of the engine, and the current output torque of the engine does not include the torque of the BSG motor. This torque down, i.e., upon receiving the torque up request, requires a reduced torque value at the overall output of the system.

The torque reduction request may come from various controllers on the vehicle that can affect the torque output, such as a transmission controller or an ESP controller. The torque reduction request may carry a target torque, and a difference obtained by subtracting a current output torque of the engine from the target torque corresponding to the torque reduction request is used as the torque reduction torque.

It should be noted that the target torque and the current output torque are in the same level, for example, the target torque and the current output torque are wheel-side torque, transmission-side torque or engine-side torque, and the two torques are in the same level to ensure the physical significance of the calculation.

And step S304, acquiring the minimum torque of the BSG motor. The minimum torque is the maximum negative torque.

The reduced torque request can only be responded to by reducing the output of the BSG motor while the BSG motor is outputting torque to assist vehicle operation. The output torque of the BSG motor under the current condition is required to be obtained firstly, and represents the torque reduction capability of the BSG motor.

And step S306, judging whether the minimum torque of the BSG motor is less than or equal to the torque reduction torque. If yes, go to step S308; if not, step S310 is performed.

When a torque reduction request is received, the BSG motor is preferentially selected to be used for reducing the torque, and the rest of the requested torque is met in a traditional transmitter adjusting mode only when the torque of the BSG motor cannot completely meet the request. Because the duration of torque increase and torque decrease is short, the torque request does not need to be met by sacrificing ignition efficiency, and the fuel economy is better.

When the minimum torque of the BSG is less than or equal to the torque reduction torque, the torque reduction request can be met only by the BSG motor, so that the output torque is reduced only by using the BSG motor; otherwise, the engine is controlled to reduce the torque output on the premise that the BSG motor outputs the minimum torque.

And step S308, controlling the BSG motor to output torque according to the torque reduction torque.

In this case, torque reduction is achieved only by the BSG motor.

And step S310, controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque.

When the BSG motor torque cannot fully meet the request, the three-cylinder engine is required to also increase the torque output. The three-cylinder engine can be controlled to output torque according to the difference between the target torque and the minimum torque by controlling and adjusting the throttle valve and/or the ignition angle.

The torque control method of the light mixing system provided by the embodiment of the invention is applied to a three-cylinder engine provided with a BSG motor, can dynamically distribute the torque through the engine and the BSG motor, preferentially selects the BSG motor to reduce the torque when the torque reduction request is available, and meets the requested torque by controlling the engine when the torque of the BSG motor can not completely meet the request, so that the engine can work in an economic area as much as possible, and the fuel economy can be improved.

Example 3

An embodiment of the present invention provides a torque control method for a light mixing system, referring to a flowchart of the torque control method for the light mixing system shown in fig. 4, the method includes the following steps:

and step S402, judging whether the vehicle has a torque increasing request sent by other controllers. If yes, go to step S404; if not, the process is ended. When a torque increasing request is obtained, calculating the maximum allowable torque of the BSG; otherwise, the normal operation condition is continuously maintained.

In step S404, the maximum allowable torque of the BSG is calculated. The power limit of the system and whether the BSG is powered down or not need to be considered in the calculation.

In step S406, a first torque-increasing relative value of the demand is calculated. I.e. requested torque increase value-current engine torque. It should be noted that the present embodiment assumes that the requested torque increase value is an absolute torque and the requested torque is at the same level as the current engine torque in the above formula, for example, the requested torque increase value is a clutch end, and the current engine torque is also referred to as a clutch end.

In step S408, it is determined whether the maximum allowable torque of the BSG is greater than or equal to the first torque-up relative value. If yes, go to step S410; if not, step S412 is performed.

If the maximum allowable torque of the BSG is larger than or equal to the torque increasing relative value required, the capability of using the BSG motor is proved to be enough to meet the torque increasing request, and the BSG motor is controlled to execute the required first torque increasing relative value; and if not, controlling the BSG motor to execute the maximum torque, and controlling the engine to execute the requested torque increasing torque, namely the maximum torque executed by the BSG, so that the torque executed by the BSG plus the torque executed by the engine is equal to the torque increasing request torque finally.

And step S410, controlling the BSG motor to execute a first torque-increasing relative value.

And step S412, controlling the BSG motor to execute the maximum allowable torque.

In step S414, control is provided to the engine to perform the requested torque increase torque, the maximum torque performed by the BSG.

Step S416: and judging whether other controllers of the vehicle send torque reduction requests or not. If yes, go to step S418; if not, the process is ended.

In step S418, the minimum torque allowed for the BSG is calculated.

In step S420, a first torque reduction relative value of the demand is calculated. I.e. requested torque down value-current engine torque.

Step S422: and judging whether the minimum allowable torque of the BSG is smaller than or equal to the first torque reduction relative value of the demand. If yes, go to step S424; if not, step S426 is performed.

If the minimum allowable torque of the BSG is smaller than or equal to the first torque reduction relative value of the requirement, the capability of using the BSG motor is proved to be enough to meet the torque reduction request, and the BSG motor is controlled to execute the first torque reduction relative value of the requirement; and if not, controlling the BSG motor to execute the minimum torque, and controlling the engine to execute the requested torque reduction torque, namely the minimum torque executed by the BSG, so that the sum of the torque executed by the BSG and the torque executed by the engine is equal to the torque reduction request torque.

And step S424, controlling the BSG motor to execute the first torque reduction relative value. I.e. requested torque down value-current engine torque.

And step S426, controlling the BSG motor to execute the minimum allowable torque.

In step S428, control is provided to the engine to perform the requested torque down torque-the minimum torque performed by the BSG.

The torque control method of the light mixing system provided by the embodiment of the invention is applied to a three-cylinder engine provided with a BSG motor, can dynamically distribute the torque through the engine and the BSG motor, preferentially selects the BSG motor to increase or decrease the torque when the torque increase or decrease request is available, and meets the requested torque by controlling the engine when the torque of the BSG motor can not completely meet the request, so that the engine can work in an economic area as much as possible, and the fuel economy can be improved.

Example 4

The embodiment of the invention provides a torque control device of a light mixing system, which is applied to a three-cylinder engine provided with a BSG motor, and the structural block diagram of the torque control device of the light mixing system shown in figure 5 comprises the following components:

a first calculating module 51, configured to calculate a torque increase torque and a maximum available torque of the BSG motor under the current situation when the torque increase request is received; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque;

a first determining module 52, configured to determine whether the maximum available torque is greater than or equal to the torque increase torque;

the first output module 53 is used for controlling the BSG motor to output torque according to torque increasing torque if the BSG motor outputs the torque;

and the second output module 54 is used for controlling the BSG motor to output the torque according to the maximum available torque and controlling the three-cylinder engine to output the torque according to the difference value between the target torque and the maximum available torque if the BSG motor is not controlled to output the torque.

The second output module 54 is further configured to: and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the maximum available torque by controlling and adjusting the throttle valve and/or the ignition angle.

An embodiment of the present invention further provides a torque control device of a light mixing system, referring to a structural block diagram of the torque control device of the light mixing system shown in fig. 6, including:

a second calculation module 61 for calculating a torque down torque when a torque down request is received; the torque reduction torque is the difference value between the target torque corresponding to the torque reduction request and the current output torque;

an obtaining module 62, configured to obtain a minimum torque of the BSG motor;

the second judging module 63 is used for judging whether the minimum torque of the BSG motor is smaller than or equal to the torque reduction torque;

the third output module 64 is used for controlling the BSG motor to output torque according to the torque reduction torque if the BSG motor outputs the torque;

and the fourth output module 65 is used for controlling the three-cylinder engine to output the torque according to the difference value of the target torque and the minimum torque if the target torque is not the minimum torque.

The embodiment of the invention also provides a torque control system of the light mixing system, which comprises a processor, a memory, a bus and a communication interface, wherein the processor, the communication interface and the memory are connected through the bus; the memory is used for storing programs; the processor is used for calling the program stored in the memory through the bus and executing the method provided by the embodiment.

Embodiments of the present invention also provide a computer readable medium having a non-volatile program code executable by a processor, where the program code causes the processor to execute the method provided by the above embodiments.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The torque control device and system of the light mixing system provided by the embodiment of the invention have the same implementation principle and the same technical effect as the method embodiments, and for the sake of brief description, the corresponding contents in the method embodiments can be referred to where the device embodiments are not mentioned.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The above functions, if implemented in the form of software functional units and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the above claims.

Claims

1. A torque control method of a light mixing system is characterized by being applied to a three-cylinder engine provided with a BSG motor and comprising the following steps:

when a torque increasing request is received, calculating a torque increasing torque and the maximum available torque of the BSG motor under the current condition; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque; the target torque is at the same level as the current output torque;

judging whether the maximum available torque is larger than or equal to the torque increasing torque;

if yes, controlling the BSG motor to output torque according to the torque increasing torque;

and if not, controlling the BSG motor to output the torque according to the maximum available torque, and controlling the three-cylinder engine to output the torque according to the difference value between the target torque and the maximum available torque.

2. The method of claim 1, wherein the step of calculating the torque up torque and the maximum available torque of the BSG motor at the present instance comprises:

subtracting the current output torque from the target torque corresponding to the torque increasing request to obtain a difference value as torque increasing torque;

and taking the difference obtained by subtracting the instant output torque of the BSG motor from the theoretical maximum torque of the BSG motor under the current condition as the maximum available torque.

3. The method of claim 1, wherein the step of controlling the three-cylinder engine to output a torque according to a difference between the target torque and the maximum available torque comprises:

and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the maximum available torque by controlling and adjusting a throttle valve and/or a firing angle.

4. A torque control method of a light mixing system is characterized by being applied to a three-cylinder engine provided with a BSG motor and comprising the following steps:

calculating a torque reduction torque when a torque reduction request is received; the torque reduction torque is the difference value between the target torque corresponding to the torque reduction request and the current output torque; the target torque is at the same level as the current output torque;

acquiring the minimum torque of the BSG motor;

judging whether the minimum torque of the BSG motor is smaller than or equal to the torque reduction torque;

if so, controlling the BSG motor to output torque according to the torque reduction torque;

and if not, controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque.

5. The method of claim 4, wherein the step of calculating the torque down torque comprises:

and taking the difference obtained by subtracting the current output torque from the target torque corresponding to the torque reduction request as the torque reduction torque.

6. The method of claim 4, wherein the step of controlling the three-cylinder engine to output a torque according to a difference between the target torque and the minimum torque comprises:

and controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque by controlling and adjusting a throttle valve and/or a firing angle.

7. The utility model provides a torque control device of light system of mixing which is characterized in that, is applied to the three-cylinder engine of installing the BSG motor, includes:

the first calculation module is used for calculating torque increasing torque and the maximum available torque of the BSG motor under the current condition when a torque increasing request is received; the torque increasing torque is the difference value between the target torque corresponding to the torque increasing request and the current output torque; the target torque is at the same level as the current output torque;

the first judgment module is used for judging whether the maximum available torque is larger than or equal to the torque increasing torque;

the first output module is used for controlling the BSG motor to output torque according to the torque increasing torque if the BSG motor outputs the torque;

and the second output module is used for controlling the BSG motor to output torque according to the maximum available torque and controlling the three-cylinder engine to output torque according to the difference value between the target torque and the maximum available torque if the BSG motor is not controlled to output torque according to the maximum available torque.

8. The apparatus of claim 7, wherein the second output module is further configured to:

9. The utility model provides a torque control device of light system of mixing which is characterized in that, is applied to the three-cylinder engine of installing the BSG motor, includes:

the second calculation module is used for calculating the torque reduction torque when the torque reduction request is received; the torque reduction torque is the difference value between the target torque corresponding to the torque reduction request and the current output torque; the target torque is at the same level as the current output torque;

the acquisition module is used for acquiring the minimum torque of the BSG motor;

the second judgment module is used for judging whether the minimum torque of the BSG motor is smaller than or equal to the torque reduction torque;

the third output module is used for controlling the BSG motor to output torque according to the torque reduction torque if the BSG motor is in the torque reduction state;

and the fourth output module is used for controlling the three-cylinder engine to output torque according to the difference value of the target torque and the minimum torque if the target torque is not equal to the minimum torque.

10. The torque control system of the light mixing system is characterized by comprising a processor, a memory, a bus and a communication interface, wherein the processor, the communication interface and the memory are connected through the bus;

the memory is used for storing programs;

the processor is used for calling a program stored in the memory through the bus and executing the method of any one of claims 1-6.