CN110535234B - BSG vehicle type autonomous power generation control method and device - Google Patents
BSG vehicle type autonomous power generation control method and device Download PDFInfo
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- CN110535234B CN110535234B CN201910795340.0A CN201910795340A CN110535234B CN 110535234 B CN110535234 B CN 110535234B CN 201910795340 A CN201910795340 A CN 201910795340A CN 110535234 B CN110535234 B CN 110535234B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a BSG vehicle type autonomous power generation control method and a device, comprising the following steps: under the normal function execution mode, judging whether the request instruction is normally received, if so, keeping the current mode, and if not, acquiring the working state of the current mode; judging whether the current mode is invalid or not according to the working state of the current mode; if yes, entering a standby mode; if not, keeping the current mode; collecting the working state of the standby mode in the standby mode; judging whether the standby mode is invalid or not according to the working state of the standby mode; if so, entering an autonomous power generation mode; if not, keeping the current mode; in the autonomous power generation mode, charging the vehicle system power supply battery and the DCDC while maintaining power terminal voltages of the system power supply battery and the DCDC; collecting the working state of the current mode; judging whether the current mode is invalid or not according to the working state of the current mode; if so, jumping to a standby mode; if not, keeping the current mode; the method has the advantage that the power supply of the whole vehicle can be maintained through the BSG under the condition that the HCU instruction fails.
Description
Technical Field
The invention relates to the field of automobile engines, in particular to a BSG (brake-band gap generator) type autonomous power generation control method and device.
Background
With the development of automotive technology, the category of vehicles has also evolved from previous fuel-powered vehicles to electric vehicles, the types of electric vehicles are also divided into pure electric vehicles and hybrid electric vehicles, the bsg (belt drive Starter generator) vehicle type belongs to one of the hybrid electric vehicles, belongs to a weak hybrid technology, and is a hybrid technology with idle stop and start functions, the engine can be suspended before the red light and in traffic jam, when the vehicle recognizes that the driver has the starting intention, the system quickly starts the engine through the BSG system, so that the oil consumption, the emission and the noise of the engine during idling operation are eliminated, the automobile displacement is reduced, can achieve the effect of saving oil by about 10 percent and reducing carbon dioxide by about 12 percent, and the cost of the BSG technology is very low, therefore, the BSG technology is quite suitable as a connection technology for transitioning from a fuel vehicle to a pure electric vehicle at the present stage.
However, the existing BSG has problems to be solved urgently, as shown in fig. 1 of the specification, the existing BSG is a network topology diagram of a 48V system ECUs (vehicle-mounted computer/Electronic Control Unit) and an HCU (engine controller/hydra au lic Control Unit), a 12V battery and a 12V load, and the 48V system ECUs and the HCU realize information interaction through CAN network communication; in the electrifying process of the 48V system ECUs, a 12V battery supplies power to a 12V electric appliance and a 48V electric appliance communication end, and a system power supply battery supplies power to a 48V system ECUs power end and a load; the HCU carries out information interaction with each ECUs through a network, judges whether to charge a 12V battery or a system power supply battery or supply power to a 12V electrical load or a 48V electrical load, requests the BSG to generate power to charge the system power supply battery and supply power to the DCDC, and charges the 12V battery or supplies power to the 12V electrical load through the DCDC.
Under the condition that the whole vehicle functions normally, the HCU request instruction is transmitted to the BSG through the CAN network, and the BSG feeds back execution information of the BSG to the HCU through the CAN network; when an HCU (hybrid vehicle control unit) has a fault or a CAN (controller area network) network has a fault, a request instruction of the HCU cannot be normally transmitted to a BSG (base station controller) or the request instruction is lost, so that the current function execution condition of the BSG cannot be met, and the current function of the BSG cannot be continuously executed.
Disclosure of Invention
The invention aims to solve the technical problem that when an HCU fails or a CAN network fails, a request instruction of the HCU cannot be normally transmitted to a BSG (base station controller) or the request instruction is lost, so that the current function execution condition of the BSG cannot be met, and the current function of the BSG cannot be continuously executed, at the moment, if a whole vehicle is still in the running process, a 12V battery and a system power supply battery of the whole vehicle are gradually exhausted, the BSG is required to be capable of executing a power generation function, and the power supply requirements of ECUs in the running process of the whole vehicle are maintained, so that a BSG vehicle type autonomous power generation control method and a BSG vehicle type autonomous power generation control device are provided, wherein the BSG vehicle type autonomous power generation:
under the normal function execution mode, judging whether the request instruction is normally received, if so, keeping the normal function execution mode, and if not, acquiring the working state of the normal function mode;
judging whether the normal function mode is invalid or not according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, keeping the normal function execution mode;
collecting the working state of the standby mode in the standby mode;
judging whether the standby mode fails according to the working state of the standby mode, if so, entering an autonomous power generation mode, and if not, keeping the standby mode;
in the autonomous power generation mode, charging the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC;
collecting the working state of an autonomous power generation mode;
and judging whether the autonomous power generation mode is invalid or not according to the working state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, keeping the autonomous power generation mode.
Further, the request instruction is any instruction which requests the execution of the BSG function by the HCU.
Further, the determining whether the normal function mode fails according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, maintaining the normal function execution mode includes:
judging whether the request instruction failure, the BSG failure in normal operation and the recorded first failure duration of the request instruction are simultaneously met or not, wherein the first failure duration of the request instruction is greater than the first preset confirmation instruction failure duration;
if so, the normal function mode fails, and the BSG jumps to the standby mode from the normal function execution mode; if not, the normal function mode is not invalid, and the BSG keeps the normal function execution mode.
Further, the determining, according to the operating state of the standby mode, whether the standby mode fails, if so, entering an autonomous power generation mode, and if not, maintaining the standby mode includes:
in the standby mode, judging whether the request command is met to fail, the power end voltage of the BSG rotor with the rotating speed larger than the first preset rotating speed N, BSG is smaller than the preset voltage, and the second failure time length is larger than or equal to the second preset confirmation failure time length at the same time, if so, the standby mode fails, and the BSG jumps from the standby mode to the autonomous power generation mode; if not, the standby mode is not failed, and the BSG keeps the standby mode.
Further, said charging the vehicle system supply battery and the DCDC while maintaining the power terminal voltages of the system supply battery and the DCDC in the autonomous power generation mode includes:
the BSG generates power by itself to charge a system power supply battery and a DCDC, and charges a low-voltage battery and supplies power to a low-voltage electrical appliance of the whole vehicle through the DCDC;
the BSG maintains the power terminal voltage of the system power supply battery and the DCDC at a second preset voltage through its own torque limit and torque gradient limit.
Further, the determining whether the autonomous power generation mode fails according to the operating state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, maintaining the autonomous power generation mode includes:
and judging whether the request instruction is successfully received and whether the BSG rotor rotating speed is less than the second preset rotating speed N1 is not satisfied, if so, keeping the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
Further, the determining that the request command is successfully received and whether the BSG rotor speed is less than the second preset speed N1 is not satisfied, if yes, maintaining the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode includes:
and judging whether the request instruction is normally received for 3 times or more and whether the BSG rotor rotating speed is less than the second preset rotating speed N1, if so, keeping the autonomous power generation mode, otherwise, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
Further, the second preset rotating speed N1 is (N-3) rpm.
Further, the command transmission is communicated through a CAN network.
On the other hand, the invention also provides a BSG vehicle type autonomous power generation control device, which comprises:
the first judgment device judges whether the request instruction is normally received or not in the normal function execution mode, if so, the normal function execution mode is kept, and if not, the working state of the normal function mode is collected;
the first acquisition device acquires the working state of the normal functional mode;
the second judgment device judges whether the normal function mode fails according to the working state of the normal function execution mode, if so, the standby mode is entered, and if not, the normal function execution mode is kept;
the second acquisition device acquires the working state of the standby mode in the standby mode;
the third judgment device judges whether the standby mode fails according to the working state of the standby mode, if so, the autonomous power generation mode is entered, and if not, the standby mode is kept;
an autonomous power generation device that charges the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC in an autonomous power generation mode;
the third acquisition device acquires the working state of the autonomous power generation mode;
and the fourth judgment device judges whether the autonomous power generation mode fails or not according to the working state of the autonomous power generation mode, if so, the autonomous power generation mode jumps to the standby mode, and if not, the autonomous power generation mode is kept.
The implementation of the invention has the following beneficial effects:
1. according to the invention, when the HCU request instruction fails or the signal loss causes that the current function execution condition of the BSG cannot be met, the BSG can judge the running and power supply state of the whole vehicle according to the rotating speed and voltage conditions of the BSG, and autonomously enters a power generation mode, so that the power supply voltage of the load of the whole vehicle can be maintained to ensure that the ECU of the whole vehicle supplies power normally.
2. The invention can enable the BSG to judge whether the SOC of a system power supply battery or a 12V battery is too low or not in the running process of the engine according to the rotating speed of the rotor and the power end voltage of the BSG, and can enter a power generation mode in time under the condition of too low battery electric quantity to prevent accidents.
3. The invention can adapt to work in different states, and can freely switch among a normal execution mode, a standby mode and an autonomous power generation mode according to the current working conditions, so that the vehicle can enter the autonomous power generation mode to ensure normal power supply of the whole vehicle under the condition of instruction failure of an anti-lock execution device.
Drawings
FIG. 1 is a network topology diagram of 48V system ECUs with HCUs, 12V batteries, and 12V loads;
fig. 2 is a schematic diagram of the BSG autonomous power generation mode principle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Examples
In this embodiment, the present invention provides a BSG vehicle-type autonomous power generation control method and apparatus, in order to solve the problems that when an HCU fails or a CAN network fails, a request instruction of the HCU cannot be normally transmitted to a BSG or the request instruction is lost, so that a current function execution condition of the BSG cannot be satisfied, and a current function of the BSG cannot be continuously executed, and at this time, if a whole vehicle is still in a driving process, a 12V battery and a system power supply battery of the whole vehicle will be gradually exhausted, so that the BSG is required to be able to execute a power generation function, and a power supply requirement of each ECUs in the driving process of the whole vehicle is maintained, the BSG vehicle-type autonomous power generation control method includes:
under the normal function execution mode, judging whether the request instruction is normally received, if so, keeping the normal function execution mode, and if not, acquiring the working state of the normal function mode;
judging whether the normal function mode is invalid or not according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, keeping the normal function execution mode;
collecting the working state of the standby mode in the standby mode;
judging whether the standby mode fails according to the working state of the standby mode, if so, entering an autonomous power generation mode, and if not, keeping the standby mode;
in the autonomous power generation mode, charging the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC;
collecting the working state of an autonomous power generation mode;
and judging whether the autonomous power generation mode is invalid or not according to the working state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, keeping the autonomous power generation mode.
In a specific embodiment, the determining whether the normal function mode is failed according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, maintaining the normal function execution mode includes:
judging whether the request instruction failure, the BSG failure in normal operation and the recorded first failure duration of the request instruction are simultaneously met or not, wherein the first failure duration of the request instruction is greater than the first preset confirmation instruction failure duration;
if so, the normal function mode fails, and the BSG jumps to the standby mode from the normal function execution mode; if not, the normal function mode is not invalid, and the BSG keeps the normal function execution mode.
In a specific embodiment, the determining, according to the operating state of the standby mode, whether the standby mode fails, if so, entering the autonomous power generation mode, and if not, maintaining the standby mode includes:
in the standby mode, judging whether the request command is met to fail, the power end voltage of the BSG rotor with the rotating speed larger than the first preset rotating speed N, BSG is smaller than the preset voltage, and the second failure time length is larger than or equal to the second preset confirmation failure time length at the same time, if so, the standby mode fails, and the BSG jumps from the standby mode to the autonomous power generation mode; if not, the standby mode is not failed, and the BSG keeps the standby mode.
In one specific embodiment, said charging the vehicle system supply battery and the DCDC while maintaining the power terminal voltages of the system supply battery and the DCDC in the autonomous power generation mode comprises:
the BSG generates power by itself to charge a system power supply battery and a DCDC, and charges a low-voltage battery and supplies power to a low-voltage electrical appliance of the whole vehicle through the DCDC;
the BSG maintains the power terminal voltage of the system power supply battery and the DCDC at a second preset voltage through its own torque limit and torque gradient limit.
In a specific embodiment, the determining whether the autonomous power generation mode fails according to the operating state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, maintaining the autonomous power generation mode includes:
and judging whether the request instruction is successfully received and whether the BSG rotor rotating speed is less than the second preset rotating speed N1 is not satisfied, if so, keeping the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
In a specific embodiment, the determining whether the request command is successfully received and the BSG rotor speed is less than the second preset speed N1 is not satisfied, if yes, maintaining the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode includes:
and judging whether the request instruction is normally received for 3 times or more and whether the BSG rotor rotating speed is less than the second preset rotating speed N1, if so, keeping the autonomous power generation mode, otherwise, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
In a specific embodiment, the second predetermined speed N1 is (N-3) rpm.
In one particular embodiment, the command transmission is communicated over a CAN network.
On the other hand, the invention also provides a BSG vehicle type autonomous power generation control device, which comprises:
the first judgment device judges whether the request instruction is normally received or not in the normal function execution mode, if so, the normal function execution mode is kept, and if not, the working state of the normal function mode is collected;
the first acquisition device acquires the working state of the normal functional mode;
the second judgment device judges whether the normal function mode fails according to the working state of the normal function execution mode, if so, the standby mode is entered, and if not, the normal function execution mode is kept;
the second acquisition device acquires the working state of the standby mode in the standby mode;
the third judgment device judges whether the standby mode fails according to the working state of the standby mode, if so, the autonomous power generation mode is entered, and if not, the standby mode is kept;
an autonomous power generation device that charges the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC in an autonomous power generation mode;
the third acquisition device acquires the working state of the autonomous power generation mode;
and the fourth judgment device judges whether the autonomous power generation mode fails or not according to the working state of the autonomous power generation mode, if so, the autonomous power generation mode jumps to the standby mode, and if not, the autonomous power generation mode is kept.
A working principle and a process of a BSG vehicle type autonomous power generation control method and device are as follows:
in the following description, a system power supply battery is represented by a voltage of a 48V system power supply battery commonly used in an existing automobile, during the entire BSG driving process, the automobile is in a normal function execution mode, when an HCU request instruction fails, the BSG system cannot meet the execution requirements and conditions of the current normal function execution mode, at this time, recording of an instruction lost time is started, when the instruction lost time is longer than that when a first preset instruction is lost, that is, when the three conditions are simultaneously met, the BSG type jumps out from the current normal function execution mode to a standby mode (the standby mode refers to a neutral safe state of the BSG, in which the BSG does not output torque or rotation speed or generate power), if one of the conditions is not met, the current normal function execution mode is maintained, when the automobile is in the standby mode, whether a jump to an autonomous power generation mode is required or not is detected, whether the HCU instruction is lost or not detected in the standby mode, detecting whether the rotating speed of a rotor of the BSG is larger than or equal to a preset value N, detecting whether the power end voltage of the BSG is smaller than the preset power end voltage, enabling the conditions of the rotating speed and the power end voltage of the BSG to reach a second preset time, if the four conditions are met, jumping to an autonomous power generation mode, and continuously keeping in a standby mode as long as one of the conditions is not met, and when the BSG enters the autonomous power generation mode, executing a power generation function by the BSG in the autonomous power generation mode: the BSG generates power to charge a system power supply battery and a DCDC, the BSG directly charges the system power supply battery and the DCDC through self power generation, and charges a 12V battery of the whole vehicle and supplies power to a 12V electric appliance through the DCDC; the BSG generates power to maintain the power end voltage of a system power supply battery and a DCDC at a second preset voltage, wherein the second preset voltage can have a positive and negative difference value of 0.5V, the BSG maintains the end voltage of the system power supply battery and the DCDC at the second preset voltage through a torque limit value and a torque gradient limit value of the BSG according to a voltage request value of a last frame before failure of an HCU, the BSG maintains the charging of the system power supply battery and a 12V battery under the condition of ensuring the power supply of a 48V electric appliance and the 12V battery, the BSG also detects whether to jump out of an autonomous power generation mode at the same time of the autonomous power generation mode, judges whether a request command of the HCU can be successfully received or not, the condition of successfully receiving the request command is that the request command is normally received for 3 times, the times can be any non-0 constant N, detects whether the rotating speed of a rotor of the BSG is less than (N-N) revolutions per minute, and jumps out of the autonomous power generation mode if the, and entering a standby mode, wherein the preset values are specific numerical values determined according to actual conditions.
The implementation of the invention has the following beneficial effects:
1. according to the invention, when the HCU request instruction fails or the signal loss causes that the current function execution condition of the BSG cannot be met, the BSG can judge the running and power supply state of the whole vehicle according to the rotating speed and voltage conditions of the BSG, and autonomously enters a power generation mode, so that the power supply voltage of the load of the whole vehicle can be maintained to ensure that the ECU of the whole vehicle supplies power normally.
2. The invention can enable the BSG to judge whether the SOC of a system power supply battery or a 12V battery is too low or not in the running process of the engine according to the rotating speed of the rotor and the power end voltage of the BSG, and can enter a power generation mode in time under the condition of too low battery electric quantity to prevent accidents.
3. The invention can adapt to work in different states, and can freely switch among a normal execution mode, a standby mode and an autonomous power generation mode according to the current working conditions, so that the vehicle can enter the autonomous power generation mode to ensure normal power supply of the whole vehicle under the condition of instruction failure of an anti-lock execution device.
Examples
In this embodiment, the present invention provides a BSG vehicle-type autonomous power generation control method and apparatus, in order to solve the problems that when an HCU fails or a CAN network fails, a request instruction of an ECM cannot be normally transmitted to a BSG or the request instruction is lost, so that a current function execution condition of the BSG cannot be satisfied, and a current function of the BSG cannot be continuously executed, and at this time, if a whole vehicle is still in a driving process, a 12V battery and a system power supply battery of the whole vehicle will be gradually exhausted, so that the BSG is required to be able to execute a power generation function, and a power supply requirement of each ECUs in the driving process of the whole vehicle is maintained, the BSG vehicle-type autonomous power generation control method includes:
under the normal function execution mode, judging whether the request instruction is normally received, if so, keeping the normal function execution mode, and if not, acquiring the working state of the normal function mode;
judging whether the normal function mode is invalid or not according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, keeping the normal function execution mode;
collecting the working state of the standby mode in the standby mode;
judging whether the standby mode fails according to the working state of the standby mode, if so, entering an autonomous power generation mode, and if not, keeping the standby mode;
in the autonomous power generation mode, charging the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC;
collecting the working state of an autonomous power generation mode;
and judging whether the autonomous power generation mode is invalid or not according to the working state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, keeping the autonomous power generation mode.
In a specific embodiment, the request instruction is any instruction that the HCU requests the BSG function to execute.
In a specific embodiment, the determining whether the normal function mode is failed according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, maintaining the normal function execution mode includes:
judging whether the request instruction failure, the BSG failure in normal operation and the recorded first failure duration of the request instruction are simultaneously met or not, wherein the first failure duration of the request instruction is greater than the first preset confirmation instruction failure duration;
if so, the normal function mode fails, and the BSG jumps to the standby mode from the normal function execution mode; if not, the normal function mode is not invalid, and the BSG keeps the normal function execution mode.
In a specific embodiment, the determining, according to the operating state of the standby mode, whether the standby mode fails, if so, entering the autonomous power generation mode, and if not, maintaining the standby mode includes:
in the standby mode, judging whether the request command is met to fail, the power end voltage of the BSG rotor with the rotating speed larger than the first preset rotating speed N, BSG is smaller than the preset voltage, and the second failure time length is larger than or equal to the second preset confirmation failure time length at the same time, if so, the standby mode fails, and the BSG jumps from the standby mode to the autonomous power generation mode; if not, the standby mode is not failed, and the BSG keeps the standby mode.
In one specific embodiment, said charging the vehicle system supply battery and the DCDC while maintaining the power terminal voltages of the system supply battery and the DCDC in the autonomous power generation mode comprises:
the BSG generates power by itself to charge a system power supply battery and a DCDC, and charges a low-voltage battery and supplies power to a low-voltage electrical appliance of the whole vehicle through the DCDC;
the BSG maintains the power terminal voltage of the system power supply battery and the DCDC at a second preset voltage through its own torque limit and torque gradient limit.
In a specific embodiment, the determining whether the autonomous power generation mode fails according to the operating state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, maintaining the autonomous power generation mode includes:
and judging whether the request instruction is successfully received and whether the BSG rotor rotating speed is less than the second preset rotating speed N1 is not satisfied, if so, keeping the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
In a specific embodiment, the determining whether the request command is successfully received and the BSG rotor speed is less than the second preset speed N1 is not satisfied, if yes, maintaining the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode includes:
and judging whether the request instruction is normally received for 3 times or more and whether the BSG rotor rotating speed is less than the second preset rotating speed N1, if so, keeping the autonomous power generation mode, otherwise, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
In a specific embodiment, the second predetermined speed N1 is (N-3) rpm.
In one particular embodiment, the command transmission is communicated over a CAN network.
On the other hand, the invention also provides a BSG vehicle type autonomous power generation control device, which comprises:
the first judgment device judges whether the request instruction is normally received or not in the normal function execution mode, if so, the normal function execution mode is kept, and if not, the working state of the normal function mode is collected;
the first acquisition device acquires the working state of the normal functional mode;
the second judgment device judges whether the normal function mode fails according to the working state of the normal function execution mode, if so, the standby mode is entered, and if not, the normal function execution mode is kept;
the second acquisition device acquires the working state of the standby mode in the standby mode;
the third judgment device judges whether the standby mode fails according to the working state of the standby mode, if so, the autonomous power generation mode is entered, and if not, the standby mode is kept;
an autonomous power generation device that charges the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC in an autonomous power generation mode;
the third acquisition device acquires the working state of the autonomous power generation mode;
and the fourth judgment device judges whether the autonomous power generation mode fails or not according to the working state of the autonomous power generation mode, if so, the autonomous power generation mode jumps to the standby mode, and if not, the autonomous power generation mode is kept.
A working principle and a process of a BSG vehicle type autonomous power generation control method and device are as follows:
in the following description, a system power supply battery is represented by a voltage of a 48V system power supply battery commonly used by an existing automobile, during the whole BSG running process, the automobile is in a normal function execution mode, when an HCU request instruction fails, the mentioned request instruction is any instruction for requesting BSG function execution by the HCU, the BSG system cannot meet the execution requirements and conditions of the current normal function execution mode, at this time, recording an instruction loss duration is started, when the instruction loss duration is longer than a first preset instruction loss duration, namely, when the three conditions are simultaneously met, a BSG automobile type jumps out from the current normal function execution mode to a standby mode, if one of the conditions is not met, the current normal function execution mode is maintained, when the automobile is in the standby mode, whether the jump to an autonomous power generation mode is needed or not is detected, whether the HCU instruction is lost or not is detected in the standby mode, whether the self rotor rotation speed of the BSG is greater than or equal to a preset value N is detected, detecting whether the BSG power end voltage is smaller than the preset power end voltage, the BSG rotor speed and power end voltage conditions are met, the duration time reaches a second preset time, if the four conditions are met, jumping to an autonomous power generation mode, if one of the conditions is not met, continuously keeping in a standby mode, and when the BSG enters the autonomous power generation mode, executing a power generation function by the BSG in the autonomous power generation mode: the BSG generates power to charge a system power supply battery and a DCDC, the BSG directly charges the system power supply battery and the DCDC through self power generation, and charges a 12V battery of the whole vehicle and supplies power to a 12V electric appliance through the DCDC; the BSG generates power to maintain the power end voltage of a system power supply battery and a DCDC at a second preset voltage, wherein the second preset voltage can have a positive and negative difference value of 0.5V, the BSG maintains the end voltage of the system power supply battery and the DCDC at the second preset voltage through a torque limit value and a torque gradient limit value of the BSG according to a voltage request value of a last frame before failure of an HCU, the BSG maintains the charging of the system power supply battery and a 12V battery under the condition of ensuring the power supply of a 48V electric appliance and the 12V battery, the BSG also detects whether to jump out of an autonomous power generation mode at the same time of the autonomous power generation mode, judges whether a request command of the HCU can be successfully received or not, the condition of successfully receiving the request command is that the request command is normally received for 3 times, the times can be any non-0 constant N, detects whether the rotating speed of a rotor of the BSG is less than (N-N) revolutions per minute, and jumps out of the autonomous power generation mode if the, and entering a standby mode, wherein the preset values are specific numerical values determined according to actual conditions.
The implementation of the invention has the following beneficial effects:
1. according to the invention, when the HCU request instruction fails or the signal loss causes that the current function execution condition of the BSG cannot be met, the BSG can judge the running and power supply state of the whole vehicle according to the rotating speed and voltage conditions of the BSG, and autonomously enters a power generation mode, so that the power supply voltage of the load of the whole vehicle can be maintained to ensure that the ECU of the whole vehicle supplies power normally.
2. The invention can enable the BSG to judge whether the SOC of a system power supply battery or a 12V battery is too low or not in the running process of the engine according to the rotating speed of the rotor and the power end voltage of the BSG, and can enter a power generation mode in time under the condition of too low battery electric quantity to prevent accidents.
3. The invention can adapt to work in different states, and can freely switch among a normal execution mode, a standby mode and an autonomous power generation mode according to the current working conditions, so that the vehicle can enter the autonomous power generation mode to ensure normal power supply of the whole vehicle under the condition of instruction failure of an anti-lock execution device.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A BSG vehicle type autonomous power generation control method is characterized by comprising the following steps:
under the normal function execution mode, judging whether the request instruction is normally received, if so, keeping the normal function execution mode, and if not, acquiring the working state of the normal function mode;
judging whether the normal function mode is invalid or not according to the working state of the normal function execution mode, if so, entering a standby mode, and if not, keeping the normal function execution mode;
collecting the working state of the standby mode in the standby mode;
judging whether the standby mode fails according to the working state of the standby mode, if so, entering an autonomous power generation mode, and if not, keeping the standby mode;
in the autonomous power generation mode, charging the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC;
collecting the working state of an autonomous power generation mode;
judging whether the autonomous power generation mode is invalid or not according to the working state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, keeping the autonomous power generation mode;
the BSG vehicle does not output torque or rotating speed or generate electricity outwards in the standby mode.
2. The BSG-vehicle-type autonomous power generation control method according to claim 1, wherein the request instruction is any instruction for requesting execution of the BSG function by the HCU.
3. The BSG vehicle-type autonomous power generation control method of claim 2, wherein the determining whether the normal function mode is out of order according to the operating state of the normal function execution mode, if so, entering a standby mode, and if not, maintaining the normal function execution mode includes:
judging whether the request instruction failure, the BSG failure in normal operation and the recorded first failure duration of the request instruction are simultaneously met or not, wherein the first failure duration of the request instruction is greater than the first preset confirmation instruction failure duration;
if so, the normal function mode fails, and the BSG jumps to the standby mode from the normal function execution mode; if not, the normal function mode is not invalid, and the BSG keeps the normal function execution mode.
4. The BSG vehicle-type autonomous power generation control method of claim 2, wherein the determining whether the standby mode is disabled according to the operating state of the standby mode, if so, entering the autonomous power generation mode, and if not, maintaining the standby mode includes:
in the standby mode, judging whether the request command is met to fail, the power end voltage of the BSG rotor with the rotating speed larger than the first preset rotating speed N, BSG is smaller than the preset voltage, and the second failure time length is larger than or equal to the second preset confirmation failure time length at the same time, if so, the standby mode fails, and the BSG jumps from the standby mode to the autonomous power generation mode; if not, the standby mode is not failed, and the BSG keeps the standby mode.
5. The BSG-vehicle-type autonomous power generation control method of claim 4, wherein said charging the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC in the autonomous power generation mode comprises:
the BSG generates power by itself to charge a system power supply battery and a DCDC, and charges a low-voltage battery and supplies power to a low-voltage electrical appliance of the whole vehicle through the DCDC;
the BSG maintains the power terminal voltage of the system power supply battery and the DCDC at a second preset voltage through its own torque limit and torque gradient limit.
6. The BSG vehicle-type autonomous power generation control method of claim 5, wherein the determining whether the autonomous power generation mode is out of order according to the operating state of the autonomous power generation mode, if so, jumping to a standby mode, and if not, maintaining the autonomous power generation mode includes:
and judging whether the request instruction is successfully received and whether the BSG rotor rotating speed is less than the second preset rotating speed N1 is not satisfied, if so, keeping the autonomous power generation mode, and if not, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
7. The BSG vehicle-type autonomous power generation control method of claim 6, wherein the determining whether the request command is successfully received and the BSG rotor speed is less than the second preset speed N1 is not satisfied, if yes, the autonomous power generation mode is maintained, and if not, the BSG jumping out of the autonomous power generation mode to enter the standby mode includes:
and judging whether the request instruction is normally received for 3 times or more and whether the BSG rotor rotating speed is less than the second preset rotating speed N1, if so, keeping the autonomous power generation mode, otherwise, jumping out of the autonomous power generation mode by the BSG to enter the standby mode.
8. The BSG vehicle-type autonomous power generation control method of claim 7, wherein said second preset rotation speed N1 is (N-3) rpm.
9. The BSG-vehicle-type autonomous power generation control method of claim 1, wherein the command transmission is communicated through a CAN network.
10. The utility model provides a BSG motorcycle type is power generation controlling means independently which characterized in that includes:
the first judgment device judges whether the request instruction is normally received or not in the normal function execution mode, if so, the normal function execution mode is kept, and if not, the working state of the normal function mode is collected;
the first acquisition device acquires the working state of the normal functional mode;
the second judgment device judges whether the normal function mode fails according to the working state of the normal function execution mode, if so, the standby mode is entered, and if not, the normal function execution mode is kept;
the second acquisition device acquires the working state of the standby mode in the standby mode;
the third judgment device judges whether the standby mode fails according to the working state of the standby mode, if so, the autonomous power generation mode is entered, and if not, the standby mode is kept;
an autonomous power generation device that charges the vehicle system supply battery and the DCDC while maintaining power terminal voltages of the system supply battery and the DCDC in an autonomous power generation mode;
the third acquisition device acquires the working state of the autonomous power generation mode;
the fourth judgment device judges whether the autonomous power generation mode fails or not according to the working state of the autonomous power generation mode, if so, the autonomous power generation mode jumps to a standby mode, and if not, the autonomous power generation mode is kept;
the BSG vehicle does not output torque or rotating speed or generate electricity outwards in the standby mode.
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