CN110091855B - 48V light mixing control system of vehicle engine - Google Patents

48V light mixing control system of vehicle engine Download PDF

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Publication number
CN110091855B
CN110091855B CN201910206914.6A CN201910206914A CN110091855B CN 110091855 B CN110091855 B CN 110091855B CN 201910206914 A CN201910206914 A CN 201910206914A CN 110091855 B CN110091855 B CN 110091855B
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signal
signal input
power
input end
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CN110091855A (en
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李康
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Jiangsu Aoyikesi Automotive Electronic Technology Co ltd
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Nantong Zhuozhong Power Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18018—Start-stop drive, e.g. in a traffic jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0657—Engine torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0676—Engine temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/083—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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

Abstract

The invention discloses a 48V light mixing control system of a vehicle engine, which is in signal transmission with engine control system software and completes data interaction, and comprises a signal input unit, a signal output unit and a data output unit, wherein the signal input unit is used for receiving various signals, summarizing the signals and supplying the summarized signals to other units in a system for use; the power supply management unit is in software signal transmission with the signal input unit and is used for carrying out power-on and power-off identification on the power supply system and carrying out signal and state processing; the functional unit is in signal transmission with the software of the power management unit and is used for receiving the signal from the power management unit and executing a corresponding control function according to the signal; and the signal output unit is in signal transmission with the function unit CAN and is used for transmitting the control instruction of the function unit to an external controller for execution through a signal transmission channel. The invention adopts a model modeling mode to build a control strategy framework of a 48V control system, is deeply fused with a traditional engine control management system, and has the advantages of rapid response, high reliability and the like.

Description

48V light mixing control system of vehicle engine
Technical Field
The invention relates to a vehicle engine electric control system, in particular to a vehicle engine 48V light mixing control system and a control method developed based on software and hardware of an engine electric control system, and belongs to the technical field of automobile electric control.
Background
In recent years, with the increasing of the vehicle retention rate and the continuous development of the automobile industry in China, the technical level of production and research and development of traditional fuel automobiles and electric automobiles in China is also increasingly improved. However, due to the increasingly shortage of petrochemical energy and the stricter fuel consumption regulations of our country for passenger vehicles, how to reduce the energy consumption of vehicles and make the vehicles more energy-saving becomes a common problem for various vehicle production enterprises at present.
Under the large background, the 48V technology is applied, and the technology is a light mixing technology with low cost, high reliability and excellent oil saving means. Compared with the traditional vehicle, the vehicle using the 48V technology has various driving functions of BSG start-stop, dynamic assistance, braking energy recovery, sliding energy recovery and the like, and can improve the oil saving rate by 10-15% while realizing the diversification of the driving functions. The most critical of the 48V technologies is "three-power", i.e., electronic control, motors and batteries. Among the three, the electrical control technology is the most critical.
The 48V technology is late in appearance and short in development time, so that the 48V technology can be regarded as a brand-new technology, and at present, the most core electric control technology in the 48V light mixing control system is mainly monopolized by foreign electric control manufacturers, mainly German BOSCH and the joint electron of the subsidiary company thereof, American Delfu, German mainland electron and other foreign electric control great heads. Under such monopoly of technologies, currently, there are few products on the market in which the 48V technology is installed in global automobile main machine factories. Although many automobile manufacturers, such as audi and gallop abroad, and giri and changan at home, put on the market the 48V products, the above-mentioned electric control huge technology is applied to all the manufacturers.
In summary, how to provide a brand-new vehicle engine 48V hybrid control system and control method based on the prior art to fill the blank in the field of China is a problem to be solved urgently by the technical staff in the field.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a vehicle engine 48V light-mixing control system, which performs data interaction with engine control system software signal transmission, and comprises:
the signal input unit is used for receiving various signals, summarizing the signals and supplying the summarized signals to other units in the system for use;
the power supply management unit is in software signal transmission with the signal input unit and is used for carrying out power-on and power-off identification on the power supply system and carrying out signal and state processing;
the functional unit is in signal transmission with the software of the power management unit and is used for receiving the signal from the power management unit and executing a corresponding control function according to the signal;
and the signal output unit is in signal transmission with the software of the functional unit and is used for transmitting the control instruction of the functional unit to an external controller for execution through a signal transmission channel.
Preferably, the vehicle engine 48V light-mix control system and the engine control system are both mounted on an engine electronic control unit hardware, and data interaction is realized between the vehicle engine 48V light-mix control system and the engine control system.
Preferably, data interaction is realized between the 48V light-mixing control system of the vehicle engine and the engine control system, and the data interaction specifically includes:
the engine control system sends relevant state information of an engine, current driver request torque and current actual torque of the engine to the vehicle engine 48V light mixing control system through internal signal transmission of software, wherein the relevant state information comprises an engine running state, engine rotating speed, water temperature, a current state, a gear, a vehicle speed, altitude and a fault condition;
the 48V light mixing control system of the vehicle engine sends the automatic start-stop state, the start air-fuel ratio, the start optimized rotating speed and the engine request torque to the engine control system through the internal signal transmission of software.
Preferably, the power management unit includes:
the 12V state management subunit is used for identifying power-on and power-off of the 12V power supply system and processing the electric quantity state and signals of a 12V lead-acid storage battery in the power supply system;
and the 48V state management subunit is used for identifying power-on and power-off of the 48V power supply system and processing the electric quantity state and signals of the 48V power supply system.
Preferably, the functional unit includes:
the power distribution subunit is used for receiving the signal from the power management unit, and performing power management and controlling the power of the system according to the signal;
the charge and discharge management subunit is used for keeping the electrical balance in the system;
the energy recovery subunit is used for deciding whether to carry out sliding energy recovery and braking energy recovery or not and deciding the magnitude of recovery torque;
the start-stop control subunit is used for judging whether to carry out automatic stop and automatic start according to the current state of the system;
and the torque distribution subunit is used for judging the priority of the torque, determining the magnitude of the forward and reverse torques and carrying out torque impact processing.
Preferably, the signal output unit includes:
the motor control subunit is interacted with a CAN signal of an external motor controller and used for calculating a motor torque signal which is correspondingly output and transmitting the motor torque signal to the motor controller to be executed through a signal transmission channel;
and the DC/DC control subunit is in signal interaction with an external DC/DC controller CAN and is used for calculating the DC/DC state and the conversion power command and transmitting the calculated DC/DC state and conversion power command to the DC/DC controller through signals to be executed.
Preferably, the signal transmission channel is a hardware CAN channel, and the signal is a CAN signal.
Preferably, the power management unit comprises a 12V state management subunit and a 48V state management subunit; the functional unit comprises a power distribution subunit, a charge and discharge management subunit, an energy recovery subunit, a start and stop control subunit and a torque distribution subunit; the signal output unit comprises a motor control subunit and a DC/DC control subunit.
Preferably, a signal input end of the signal input unit is in signal transmission with a system bottom layer receiving sensor and a signal transmission network software, and a signal output end of the signal input unit is in signal transmission with a signal input end of the 12V state management subunit and a signal input end of the 48V state management subunit respectively;
the signal output end of the 12V state management subunit is respectively in software signal transmission with the signal input end of the power distribution subunit, the signal input end of the start-stop control subunit and the signal input end of the DC/DC control subunit;
the signal output end of the 48V state management subunit is respectively in software signal transmission with the signal input end of the power distribution subunit, the signal input end of the energy recovery subunit and the signal input end of the start-stop control subunit;
the signal output end of the power distribution subunit is respectively in software signal transmission with the signal input end of the charge and discharge management subunit and the signal input end of the energy recovery subunit;
the signal output end of the charge and discharge management subunit is respectively in software signal transmission with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit;
the signal output end of the energy recovery subunit is in software signal transmission with the signal input end of the charge and discharge management subunit and the signal input end of the torque distribution subunit respectively;
the signal output end of the start-stop control subunit is respectively in software signal transmission with the signal input end of the charge-discharge management subunit and the signal input end of the engine control system;
the signal output end of the torque distribution subunit is respectively in signal transmission with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit;
the signal output end of the motor control subunit is in signal transmission with a signal input end CAN of an external motor controller;
and the signal output end of the DC/DC control subunit is in signal transmission with a signal input end CAN of an external DC/DC controller.
Compared with the prior art, the invention has the advantages that:
the invention discloses a vehicle engine 48V light mixing control system, which is a highly integrated control system established on the basis of an original engine management system. In addition, the system of the invention has no time delay caused by the plug-in 48V controller, thereby having the advantages of rapid response, high reliability and the like.
The system can also realize various functions such as state management, power management, battery electric balance, motor assistance, advanced start-stop, torque priority and functional torque distribution, energy recovery, DC/DC intelligent management and the like, obviously improves the driving performance on the premise of saving oil consumption and realizes the diversification of the driving function.
In addition, the invention also provides reference for other related problems in the same field, can be expanded and extended on the basis of the reference, is applied to the technical scheme of other related 48V light mixing control systems in the same field, and has very wide application prospect.
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of facilitating understanding and understanding of the technical solutions of the present invention.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
Detailed Description
As shown in FIG. 1, the invention discloses a vehicle engine 48V light mixing control system which is in signal transmission with engine control system software and completes data interaction, comprising:
and the signal input unit is used for receiving various signals, summarizing the signals and supplying the summarized signals to other units in the system for use.
And the power supply management unit is in signal transmission with the software of the signal input unit and is used for carrying out power-on and power-off identification on the power supply system and carrying out signal and state processing.
And the functional unit is in signal transmission with the software of the power management unit and is used for receiving the signal from the power management unit and executing a corresponding control function according to the signal.
And the signal output unit is in signal transmission with the function unit CAN and is used for transmitting the control instruction of the function unit to an external controller for execution through a signal transmission channel.
The invention discloses a vehicle engine 48V light mixing control system and a control method thereof, wherein the vehicle engine 48V light mixing control system and the control method thereof are developed on the basis of the existing engine electric control system, the 48V light mixing control system does not increase the cost of any electric control unit, can directly realize the control purpose on the basis of the existing engine electric control unit hardware, and can be deeply nested and coexisted with the engine electric control system software.
For automobile host manufacturers, after the invention is used, the 48V function can be realized and the purposes of reducing oil consumption and emission can be realized only by adding other products such as motors, batteries and the like required by a 48V system, thereby not only realizing the technical effect, but also obviously reducing the production cost.
Specifically, the vehicle engine 48V light-mixed control system and the engine control system are both mounted on the hardware of the engine electronic control unit, and data interaction is realized between the vehicle engine 48V light-mixed control system and the engine control system.
The vehicle engine 48V light mixing control system and the engine control system realize data interaction, and the method specifically comprises the following steps:
the engine control system sends relevant state information of the engine, including engine running state, engine speed, water temperature, current state, gear, vehicle speed, altitude, fault condition and the like, current driver request torque and current actual engine torque to the vehicle engine 48V hybrid control system through software internal signal transmission.
The vehicle engine 48V light mixing control system sends an engine automatic start-stop state to the engine control system through internal signal transmission of software so as to realize shutdown of the engine control system. The air-fuel ratio at start-up and the speed at which start-up is optimized are also sent, while the engine torque request is also sent for effecting motor charging.
The power management unit includes:
and the 12V state management subunit is used for identifying power-on and power-off of the 12V power system and processing the electric quantity state and signals of the 12V lead-acid storage battery in the power system.
And the 48V state management subunit is used for identifying power-on and power-off of the 48V power supply system and processing the electric quantity state and signals of the 48V power supply system.
The functional unit includes:
and the power distribution subunit is used for receiving the signal from the power management unit, and performing power management and controlling the power of the system according to the signal.
And the charge and discharge management subunit is used for keeping the electrical balance in the system.
And the energy recovery subunit is used for deciding whether to carry out sliding energy recovery and braking energy recovery or not and deciding the magnitude of the recovery torque.
And the start-stop control subunit is used for judging whether to carry out automatic stop and automatic start according to the current state of the system.
And the torque distribution subunit is used for judging the priority of the torque, determining the magnitude of the forward and reverse torques and carrying out torque impact processing.
The signal output unit includes:
and the motor control subunit is in signal transmission with an external motor controller CAN and is used for calculating a motor torque signal which is correspondingly output and transmitting the motor torque signal to the motor controller through a signal transmission channel for execution.
And the DC/DC control subunit is in signal transmission with an external DC/DC controller CAN and is used for calculating the DC/DC state and the conversion power command and transmitting the calculation result to the DC/DC controller through signals to be executed. The signal transmission channel is a hardware CAN channel, and the signal is a CAN signal.
The connection relationship among the units in the present invention is described in detail below:
the signal input end of the signal input unit is in signal transmission with a system bottom layer receiving sensor and a signal transmission network software, and the signal output end of the signal input unit is in signal transmission with the signal input end of the 12V state management subunit and the signal input end of the 48V state management subunit respectively.
And the signal output end of the 12V state management subunit is respectively in software signal transmission with the signal input end of the power distribution subunit, the signal input end of the start-stop control subunit and the signal input end of the DC/DC control subunit.
And the signal output end of the 48V state management subunit is respectively in software signal transmission with the signal input end of the power distribution subunit, the signal input end of the energy recovery subunit and the signal input end of the start-stop control subunit.
And the signal output end of the power distribution subunit is respectively in software signal transmission with the signal input end of the charge and discharge management subunit and the signal input end of the energy recovery subunit.
And the signal output end of the charge and discharge management subunit is respectively in signal transmission with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit.
And the signal output end of the energy recovery subunit is in software signal transmission with the signal input end of the charge and discharge management subunit and the signal input end of the torque distribution subunit respectively.
And the signal output end of the start-stop control subunit is respectively in software signal transmission with the signal input end of the charge-discharge management subunit and the signal input end of the engine control system.
And the signal output end of the torque distribution subunit is respectively in signal transmission with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit.
The signal output end of the motor control subunit is in software signal transmission with the signal input end of an external motor controller;
and the signal output end of the DC/DC control subunit is in signal transmission with the signal input end of an external DC/DC controller through software.
The following describes the electrical signal flow process of the present invention in detail with reference to the signal trend in fig. 1:
the signal input unit is mainly used for inputting a signal interface, receiving signals of the sensor through the bottom layer of the system, receiving required signals and key signals of the engine control system through the CAN network, confirming and summarizing signal validity, and supplying the signals to other control modules of the 48V control system for use.
According to the actual software running sequence, the signal of the signal input unit firstly enters the 12V state management subunit to confirm whether the 12V power supply can work normally, and then enters the 48V state management subunit to confirm whether the 48V power supply can work normally.
And then, outputting a relevant signal from a 48V power supply state to enter a power distribution subunit and an energy recovery subunit, determining the maximum power which can be used in various modes through power distribution by the power distribution subunit, then outputting the relevant maximum power to a charge and discharge management subunit, and starting and stopping a control subunit.
The charging and discharging management subunit is the core of the whole 48 control system, controls the electric balance of the 12V and 48 power supplies of the whole vehicle, determines the charging and discharging state and the charging and discharging amplitude, outputs whether a start-stop signal is allowed to the start-stop control subunit after the calculation of the charging and discharging management subunit is completed, and outputs the charging power and the maximum allowable discharging power to the torque distribution subunit, the motor control subunit and the DC/DC control subunit.
The energy recovery subunit receives the signal provided by the 48V state management subunit and the maximum charging power allowed by the power splitting subunit, determines whether to perform energy recovery or not, the size of the recovered energy, the type of the energy recovery, the braking energy recovery or the arc energy recovery, ensures the driving comfort during the energy recovery, and sends the torque required to be recovered by the motor to the torque distribution subunit for processing.
The start-stop control subunit receives the basic signal of the 12V state management subunit, judges whether the charge-discharge management subunit forbids automatic start-stop or not by combining other CAN signals, judges whether the charge-discharge management subunit enters the automatic stop or not, automatically starts the charge-discharge management subunit, and outputs start-stop state signals to the engine control system and the motor control subunit.
The torque distribution subunit receives the recovery torque signal of the energy recovery subunit and the charge and discharge power of the charge and discharge management subunit, and distributes specific charge and discharge torque according to the torque priority.
The motor control subunit receives signals of the charge and discharge management subunit, the start and stop control subunit and the torque distribution subunit, and outputs a torque request and a state request which are finally transmitted to the motor controller after safety judgment.
The DC/DC control subunit decides the state of the DC/DC and the power of the DC/DC according to the state of the 12V battery transmitted by the 12V state management subunit, the signal of the charging and discharging upper limit of the charging and discharging management subunit and the signal of the torque distribution subunit.
Generally speaking, the vehicle engine 48V light mixing control system is a highly integrated control system established on the basis of an original engine management system, and a control strategy framework of the 48V control system is established by adopting a model modeling mode on the basis of not increasing hardware cost and is deeply fused with a traditional engine control management system. The system of the invention has no time delay caused by the plug-in 48V controller, thereby having the advantages of rapid response, high reliability and the like.
The system can also realize various functions such as state management, power management, battery electric balance, motor assistance, advanced start-stop, torque priority and functional torque distribution, energy recovery, DC/DC intelligent management and the like, obviously improves the driving performance on the premise of saving oil consumption and realizes the diversification of the driving function.
In addition, the invention also provides reference for other related problems in the same field, can be expanded and extended on the basis of the reference, is applied to the technical scheme of other related 48V light mixing control systems in the same field, and has very wide application prospect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (1)

1. A vehicle engine 48V gently mixes control system, with engine control system electric connection and accomplish data interaction, its characterized in that includes:
the signal input unit is used for receiving various signals, summarizing the signals and supplying the summarized signals to other units in the system for use;
the power supply management unit is electrically connected with the signal input unit and is used for carrying out power-on and power-off identification on the power supply system and carrying out signal and state processing;
the functional unit is electrically connected with the power management unit and used for receiving the signal from the power management unit and executing a corresponding control function according to the signal;
the signal output unit is electrically connected with the functional unit and is used for transmitting the control instruction of the functional unit to the external controller for execution through the signal transmission channel;
the vehicle engine 48V light mixing control system and the engine control system are both electrically connected to engine electronic control unit hardware, and data interaction is realized between the vehicle engine 48V light mixing control system and the engine control system;
the vehicle engine 48V light mixing control system and the engine control system realize data interaction, and the method specifically comprises the following steps:
the engine control system sends relevant state information of an engine, current driver request torque and current actual engine torque to the vehicle engine 48V light mixing control system through engine electronic control unit hardware, wherein the relevant state information comprises an engine running state, engine rotating speed, water temperature, a current state, a gear, a vehicle speed, altitude and a fault condition;
the vehicle engine 48V light mixing control system sends an engine automatic start-stop state, a start air-fuel ratio, a start optimized rotating speed and an engine request torque to the engine control system through engine electronic control unit hardware;
the power management unit includes:
the 12V state management subunit is used for identifying power-on and power-off of the 12V power supply system and processing the electric quantity state and signals of a 12V lead-acid storage battery in the power supply system;
the 48V state management subunit is used for identifying power-on and power-off of the 48V power supply system and processing the electric quantity state and the signal of the 48V power supply system;
the functional unit includes:
the power distribution subunit is used for receiving the signal from the power management unit, and performing power management and controlling the power of the system according to the signal;
the charge and discharge management subunit is used for keeping the electrical balance in the system;
the energy recovery subunit is used for deciding whether to carry out sliding energy recovery and braking energy recovery or not and deciding the magnitude of recovery torque;
the start-stop control subunit is used for judging whether to carry out automatic stop and automatic start according to the current state of the system;
the torque distribution subunit is used for judging the priority of the torque, determining the magnitude of the forward and reverse torques and carrying out torque impact processing;
the signal output unit includes:
the motor control subunit is electrically connected with the external motor controller and used for calculating a motor torque signal which is correspondingly output and transmitting the motor torque signal to the motor controller to be executed through the signal transmission channel;
the DC/DC control subunit is electrically connected with the external DC/DC controller and is used for calculating the DC/DC state and the switching power instruction and transmitting the calculated DC/DC state and switching power instruction to the DC/DC controller for execution through signals;
the signal transmission channel is a hardware CAN channel, and the signal is a CAN signal;
the power management unit comprises a 12V state management subunit and a 48V state management subunit;
the functional unit comprises a power distribution subunit, a charge and discharge management subunit, an energy recovery subunit, a start and stop control subunit and a torque distribution subunit;
the signal output unit comprises a motor control subunit and a DC/DC control subunit;
the signal input end of the signal input unit is electrically connected with the system bottom layer receiving sensor and the signal transmission network, and the signal output end of the signal input unit is respectively electrically connected with the signal input end of the 12V state management subunit and the signal input end of the 48V state management subunit;
the signal output end of the 12V state management subunit is electrically connected with the signal input end of the power distribution subunit, the signal input end of the start-stop control subunit and the signal input end of the DC/DC control subunit respectively;
the signal output end of the 48V state management subunit is respectively and electrically connected with the signal input end of the power distribution subunit, the signal input end of the energy recovery subunit and the signal input end of the start-stop control subunit;
the signal output end of the power distribution subunit is electrically connected with the signal input end of the charge and discharge management subunit and the signal input end of the energy recovery subunit respectively;
the signal output end of the charge and discharge management subunit is electrically connected with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit respectively;
the signal output end of the energy recovery subunit is electrically connected with the signal input end of the charge and discharge management subunit and the signal input end of the torque distribution subunit respectively;
the signal output end of the start-stop control subunit is electrically connected with the signal input end of the charge-discharge management subunit and the signal input end of the engine control system respectively;
the signal output end of the torque distribution subunit is electrically connected with the signal input end of the motor control subunit and the signal input end of the DC/DC control subunit respectively;
the signal output end of the motor control subunit is electrically connected with the signal input end of an external motor controller;
and the signal output end of the DC/DC control subunit is electrically connected with the signal input end of an external DC/DC controller.
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