CN116061914A - Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type - Google Patents

Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type Download PDF

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Publication number
CN116061914A
CN116061914A CN202111298097.5A CN202111298097A CN116061914A CN 116061914 A CN116061914 A CN 116061914A CN 202111298097 A CN202111298097 A CN 202111298097A CN 116061914 A CN116061914 A CN 116061914A
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China
Prior art keywords
engine
driving motor
control unit
starting
unit hcu
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Pending
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CN202111298097.5A
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Chinese (zh)
Inventor
王远波
王丽萍
王瀚州
许振华
陈姿霖
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Shaanxi Heavy Duty Automobile Co Ltd
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Shaanxi Heavy Duty Automobile Co Ltd
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Priority to CN202111298097.5A priority Critical patent/CN116061914A/en
Publication of CN116061914A publication Critical patent/CN116061914A/en
Pending legal-status Critical Current

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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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0803—Circuits or control means specially adapted for starting of engines characterised by means for initiating engine start or stop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • 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
    • 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
    • B60W2510/10—Change speed gearings
    • B60W2510/1005—Transmission ratio engaged
    • B60W2510/101—Transmission neutral 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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/081—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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/10—Change speed gearings
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/24—Energy storage means
    • B60W2710/242—Energy storage means for electrical energy
    • 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)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention provides a method for starting an engine of a parallel oil-electricity hybrid vehicle type, which comprises the steps of starting by a key T50, judging a high-voltage allowable power-on condition, and controlling a power battery BMS system to be powered on; when the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotating speed of the driving motor to be in a set value through a rotating speed control mode, and simultaneously controls the clutch to be combined; when the clutch is combined, the driving motor drives the engine and the driving motor to coaxially rotate through the intermediate shaft, and after the rotating speed of the engine is judged to reach a set value and to be stable, the engine is started. The invention can drive the engine to start by controlling the rotating speed of the motor so as to achieve the aim of starting the vehicle quickly. The invention adopts a mode of controlling and starting the engine at a proper rotating speed, which not only can avoid the uncertainty of the value caused by external factors, but also can quickly and stably start the engine, thereby avoiding the shaking condition of the vehicle during starting.

Description

Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type
Technical Field
The invention belongs to the technical field of hybrid electric vehicles connected in parallel, and particularly relates to a method for starting an engine by a parallel hybrid electric vehicle type.
Background
The driving motor and the engine of the hybrid electric vehicle type with the oil and electricity connected in parallel can be independently used as a driving source to drive the engine, and the engine and the driving motor are mechanically connected by controlling the connection and disconnection of the clutch, and when the clutch is closed, the driving motor and the engine coaxially rotate. The transmission diesel vehicle adopts the starter to start the engine, and the parallel hybrid power engine and the driving motor coaxially rotate, so that the driving motor can be adopted to drive the engine to rotate to start the engine, when the driving motor is used for controlling the starting, a torque control mode is generally adopted to control the torque of the motor to be transmitted to an intermediate shaft of the engine to drive the engine to start, but the required starting torque value is different according to different mechanical structures of the engine and different current environment temperatures, air inlet temperatures and the like, the engine cannot be started due to too small torque, and the vehicle shakes seriously when the torque is started too much, so that the universality is not strong.
Disclosure of Invention
The invention adopts a rotating speed control mode to control the specific rotating speed value of the motor, and the intermediate shaft rotates the engine according to the specific rotating speed, so that the engine can be successfully started. The specific rotation speed value is set in the idle speed deviation range of the engine, and the engine is started by adopting a proper rotation speed control mode, so that the engine can be started quickly and stably without being uncertain in value caused by external factors, and the situation of vehicle shake during starting is avoided.
Specifically, the invention is realized by adopting the following technical scheme:
the invention provides a method for starting an engine by a parallel oil-electricity hybrid vehicle model, which comprises the following steps:
starting a key T50, judging a high-voltage power-on permission condition, and controlling a power battery BMS system to power on;
when the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotating speed of the driving motor to be at a set value through a rotating speed control mode, and simultaneously controls the clutch to be combined;
when the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through the intermediate shaft, and after the rotating speed of the engine is judged to reach a set value and to be stable, the engine is started.
As a further illustration of the present invention, the key T50 is started, and the process of determining the condition of allowing power-up of high voltage and controlling the power-up of the BMS of the high voltage system specifically includes:
the HCU detects that the key T50 signal is valid, judges whether the current vehicle information meets the high-voltage power-on condition, and if not, starts the engine by controlling a conventional starter;
when the vehicle control unit HCU judges that the high-voltage power-on condition is met, the BMS system of the power battery is controlled to be enabled by high-voltage power-on, and the BMS controls the high-voltage contactor to be closed, so that the current high-voltage loop is in a connection state.
As a further explanation of the present invention, when the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotation speed of the driving motor to be at a set value through a rotation speed control mode, and the process of controlling the clutch to be engaged specifically includes:
when the vehicle control unit HCU judges that the current high-voltage loop is in a connection state, controlling a driving motor to enable;
when the driving motor receives a motor enabling signal sent by the whole vehicle control unit HCU, judging that a motor system has no major fault, and receiving a control command from the whole vehicle control unit HCU, and simultaneously, feeding back a state ready for receiving the control command to the whole vehicle control unit HCU by a motor controller MCU;
when the whole vehicle control unit HCU monitors the state that the driving motor is ready to receive a control command, a rotating speed control mode with a rotating speed control value as a set value is adopted to control the driving motor;
when the motor controller MCU receives a command for controlling the rotation speed of the driving motor sent by the whole vehicle control unit HCU, controlling the driving motor executing mechanism to execute a set rotation speed value;
when the control unit HCU monitors that the rotating speed of the driving motor reaches a set value, the gearbox TCU is controlled to slowly close the clutch, so that the rotating shaft of the driving motor drives the engine intermediate shaft to slowly rotate.
As a further explanation of the present invention, after the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through the intermediate shaft, and after the rotational speed of the engine is judged to reach the set value and be stable, the process of starting the engine is specifically including:
when the clutch is completely closed, the driving motor and the engine are coaxially rotated, and meanwhile, the engine ECU sends a current rotating speed signal to the whole vehicle control unit HCU;
when the rotation speed of the engine is monitored by the whole vehicle control unit HCU to be larger than the starting threshold value for a period of time, the rotation speed of the engine is maintained to be in an idle speed control state and is kept stable, the rotation speed of the driving motor is not controlled by the whole vehicle control unit HCU, the clutch is disconnected, and the starting of the engine is completed.
As a further explanation of the present invention, when the driving motor receives the motor enable signal sent by the vehicle control unit HCU, and it is determined that there is no major failure in the motor system, and when a control command from the vehicle control unit HCU is received, the control command includes a torque control mode, a torque control value, a rotation speed control mode, and a rotation speed control value, and the rotation speed control command and the torque control command only select one control mode at the same time.
As a further explanation of the present invention, when the vehicle control unit HCU monitors that the driving motor is ready to receive the control command, the driving motor is controlled by sending a torque rotation speed control message TSC1 satisfying the J1939 protocol, and a rotation speed control mode in which the rotation speed control value is a set value is adopted.
As a further explanation of the present invention, when judging the high voltage allowable power-on condition, the judgment condition includes the following information: the gearbox is in a neutral state, the high-voltage battery BMS system has no three-level faults, the motor MCU system has no three-level faults, and the insulation system has no faults.
As a further explanation of the present invention, the vehicle control unit HCU is a vehicle control unit HCU controlled by an integrated start module.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention can drive the engine to start by controlling the rotating speed of the motor so as to achieve the aim of starting the vehicle quickly. The invention adopts a rotating speed control mode to control the specific rotating speed value of the motor, and the intermediate shaft rotates the engine according to the specific rotating speed, so that the engine can be successfully started. The specific rotation speed value can be set in the idle speed deviation range of the engine, and the engine is started by adopting a proper rotation speed control mode, so that the engine can be started quickly and stably without being uncertain due to external factors, and the situation of vehicle shake during starting is avoided.
Drawings
FIG. 1 is a block diagram of an engine start control system for a parallel hybrid electric vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for starting an engine of a parallel hybrid vehicle model according to an embodiment of the present invention;
fig. 3 is a logic judgment block diagram of a method for starting an engine of a parallel hybrid electric vehicle according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The technical scheme of the present invention will be explained in conjunction with specific embodiments.
As shown in fig. 1, the method for starting the engine of the parallel hybrid electric vehicle type provided by the invention relates to a parallel hybrid electric vehicle type which comprises a whole vehicle control unit HCU controlled by an integrated starting module, a power battery system BMS for providing a high-voltage power supply, a driving motor system MCU capable of being used as an independent driving source, a fuel engine system ECU, an electric control clutch unit CCU and a gearbox control system TCU, wherein the driving motor is arranged at the input shaft end of the gearbox, the engine and the driving motor are connected through a clutch, when the clutch is combined, the engine is coaxial with the driving motor, and when the clutch is disconnected, the engine and the driving motor are not connected.
The driving motor is arranged at the input shaft end of the gearbox, the engine is connected with the driving motor through a clutch, the engine and the driving motor can independently drive the vehicle and can simultaneously drive the vehicle, the engine can be started by adopting a traditional starting mode, the engine can also be started by adopting the driving motor, the intermediate shaft can be dragged by adopting a torque control transmission mode by adopting the driving motor to start the engine, and the intermediate shaft can also be driven by adopting a rotating speed control mode by controlling the rotating speed of the motor. The invention adopts a mode of controlling the rotation speed of the driving motor to start the engine.
The vehicle control units HCU in the method for starting the engine of the parallel hybrid electric vehicle type provided in the following embodiments are all vehicle control units HCU controlled by the integrated starting module.
As shown in fig. 2, the present invention provides a method for starting an engine of a parallel hybrid electric vehicle, comprising:
starting a key T50, judging a high-voltage power-on permission condition, and controlling a power battery BMS system to power on;
when the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotating speed of the driving motor to be at a set value through a rotating speed control mode, and simultaneously controls the clutch to be combined;
when the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through the intermediate shaft, and after the rotating speed of the engine is judged to reach a set value and to be stable, the engine is started.
In one implementation manner, the key T50 is started, and the process of determining the condition of allowing power-on by high voltage and controlling the power-on of the high voltage system BMS specifically includes:
the HCU detects that the key T50 signal is valid, judges whether the current vehicle information meets the high-voltage power-on condition, and if not, starts the engine by controlling a conventional starter;
when the vehicle control unit HCU judges that the high-voltage power-on condition is met, the BMS system of the power battery is controlled to be enabled by high-voltage power-on, and the BMS controls the high-voltage contactor to be closed, so that the current high-voltage loop is in a connection state.
In one implementation manner, after the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotation speed of the driving motor to be at a set value through a rotation speed control mode, and meanwhile, the process of controlling the clutch to be combined specifically includes:
when the vehicle control unit HCU judges that the current high-voltage loop is in a connection state, controlling a driving motor to enable;
when the driving motor receives a motor enabling signal sent by the whole vehicle control unit HCU, judging that a motor system has no major fault, and receiving a control command from the whole vehicle control unit HCU, and simultaneously, feeding back a state ready for receiving the control command to the whole vehicle control unit HCU by a motor controller MCU;
when the whole vehicle control unit HCU monitors the state that the driving motor is ready to receive a control command, a rotating speed control mode with a rotating speed control value as a set value is adopted to control the driving motor;
when the motor controller MCU receives a command for controlling the rotation speed of the driving motor sent by the whole vehicle control unit HCU, controlling the driving motor executing mechanism to execute a set rotation speed value;
when the control unit HCU monitors that the rotating speed of the driving motor reaches a set value, the gearbox TCU is controlled to slowly close the clutch, so that the rotating shaft of the driving motor drives the engine intermediate shaft to slowly rotate.
In one implementation manner, after the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through the intermediate shaft, and after the rotational speed of the engine is judged to reach a set value and be stable, the process of starting the engine is completed specifically includes:
when the clutch is completely closed, the driving motor and the engine are coaxially rotated, and meanwhile, the engine ECU sends a current rotating speed signal to the whole vehicle control unit HCU;
when the rotation speed of the engine is monitored by the whole vehicle control unit HCU to be larger than the starting threshold value for a period of time, the rotation speed of the engine is maintained to be in an idle speed control state and is kept stable, the rotation speed of the driving motor is not controlled by the whole vehicle control unit HCU, the clutch is disconnected, and the starting of the engine is completed.
The following is a detailed explanation of the method for starting the engine of the parallel hybrid electric vehicle type:
as shown in fig. 3, the specific steps of the engine start control of the parallel oil-electricity hybrid vehicle type provided by the invention are as follows:
step 1: the integrated starting module controlled whole vehicle control unit HCU detects that the key T50 signal is valid, namely, a driver operates the key to start, the integrated starting module controlled whole vehicle control unit HCU enters a high-voltage power-on control logic, whether the current vehicle information meets a high-voltage power-on condition is judged firstly, and the general judgment condition comprises the following information: the gearbox is in a neutral state, the high-voltage battery BMS system has no three-level fault, the motor MCU system has no three-level fault, the insulation system has no fault and other high-voltage systems related to the motor MCU system have no three-level fault; but not limited to these conditions, as long as the safety of the whole vehicle and the safety of the high-voltage system are both classified as high-voltage power-on conditions, for example, if the plug-in hybrid vehicle is in a state of externally connecting a charging pile, if the state of the high-voltage contactor is in adhesion, if the power battery or the motor and the insulated communication are in a normal state, if one of the above-listed states is in an abnormal condition or not, the high-voltage power-on process is not allowed to be entered, then the engine is started by controlling a conventional starter.
Step 2: when the integrated starting module controlled vehicle control unit HCU meets the high-voltage power-on condition, the BMS system is controlled to be powered on and enabled, the BMS is controlled to close the high-voltage contactor, the voltage of the monitoring motor reaches more than 90% of the voltage of the power battery (more than 90% of the voltage value is an empirical value, different high-voltage systems can possibly have differences, and the high-voltage systems can be changed and set according to the actual vehicle state through calibration parameters), or other conditions in the high-voltage system are judged to be in a state of being switched on.
Step 3: when the motor receives the motor enable signal 1 sent by the whole vehicle control unit HCU, the motor system is judged to have no major fault, and a control command from the whole vehicle control unit HCU can be received, wherein the control command comprises a torque control mode, a torque control value, a rotating speed control mode and a rotating speed control value, the rotating speed control command and the torque control command only select one control mode at the same moment, and meanwhile, the motor controller MCU feeds back the state ready for receiving the control command to the whole vehicle control unit HCU.
Step 4: when the integrated starting module controlled vehicle control unit HCU monitors the state that the motor is ready to receive the control command, the motor is controlled by sending a torque rotating speed control message TSC1 meeting the J1939 protocol, the control mode is rotating speed control, the rotating speed control value is a set value, and the set value is required to meet the requirement that the motor can drive the engine through an engine intermediate shaft. The setting of the rotation speed set value needs to consider the minimum rotation speed value capable of driving the engine to start, the factors of small vehicle shake caused by the falling of the rotation speed after the engine is started, the lowest engine starting oil consumption and the like, and finally, the proper rotation speed value is determined.
Step 5: when the motor controller MCU receives a command for controlling the motor rotation speed sent by the whole vehicle control unit HCU controlled by the integrated starting module, responding to the control mode as rotation speed control, responding to the control rotation speed value as a set value, controlling the motor executing mechanism to execute the rotation speed value, collecting the current rotation speed value of the motor through the rotation speed sensor, and broadcasting the current rotation speed value through a state message; when the vehicle control unit HCU continuously controls, the motor needs to have the capability of keeping the motor rotation speed at the set value all the time, even if the external load increases.
Step 5: when the motor rotating speed reaches a set value, the integrated starting module controlled complete vehicle control unit HCU controls the gearbox TCU to close the clutch, the clutch state is in a closed state to indicate that the motor rotating shaft is in rigid connection with the engine intermediate shaft, the clutch actuating mechanism is controlled to push the clutch to close after the TCU receives an instruction, the motor rotating shaft drives the engine intermediate shaft to also start to rotate slowly in the process of slowly closing the clutch, when the clutch is completely closed, the motor and the engine rotate coaxially, the engine rotating speed also reaches the set value at the moment, the engine ECU acquires the current rotating speed through the rotating speed sensor, and the engine state message is broadcasted.
Step 6: when the engine speed is monitored by the whole vehicle control unit HCU controlled by the integrated starting module to be larger than the starting threshold value for a period of time, the engine speed is maintained to be in an idle speed control state, and the engine is considered to be successfully started if the engine speed is kept stable, the motor speed is not controlled by the whole vehicle control unit HCU, the clutch is disconnected, and the starting of the engine by the vehicle is completed.
The embodiments given above are preferred examples for realizing the present invention, and the present invention is not limited to the above-described embodiments. Any immaterial additions and substitutions made by those skilled in the art according to the technical features of the technical scheme of the invention are all within the protection scope of the invention.

Claims (8)

1. A method for starting an engine of a parallel hybrid electric vehicle, comprising:
starting a key T50, judging a high-voltage power-on permission condition, and controlling a power battery BMS system to power on;
when the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotating speed of the driving motor to be at a set value through a rotating speed control mode, and simultaneously controls the clutch to be combined;
when the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through the intermediate shaft, and after the rotating speed of the engine is judged to reach a set value and to be stable, the engine is started.
2. The method for starting an engine of a parallel hybrid electric vehicle according to claim 1, wherein the key T50 is started, the condition for judging the power-on permission of the high voltage is judged, and the process for controlling the power-on of the high voltage system BMS specifically comprises:
the HCU detects that the key T50 signal is valid, judges whether the current vehicle information meets the high-voltage power-on condition, and if not, starts the engine by controlling a conventional starter;
when the vehicle control unit HCU judges that the high-voltage power-on condition is met, the BMS system of the power battery is controlled to be enabled by high-voltage power-on, and the BMS controls the high-voltage contactor to be closed, so that the current high-voltage loop is in a connection state.
3. The method for starting an engine of a parallel hybrid electric vehicle according to claim 2, wherein after the high-voltage power-on system is completed and the driving motor is in a ready state, the whole vehicle control unit HCU controls the rotation speed of the driving motor at a set value through a rotation speed control mode, and the process of controlling the clutch combination specifically comprises:
when the vehicle control unit HCU judges that the current high-voltage loop is in a connection state, controlling a driving motor to enable;
when the driving motor receives a motor enabling signal sent by the whole vehicle control unit HCU, judging that a motor system has no major fault, and receiving a control command from the whole vehicle control unit HCU, and simultaneously, feeding back a state ready for receiving the control command to the whole vehicle control unit HCU by a motor controller MCU;
when the whole vehicle control unit HCU monitors the state that the driving motor is ready to receive a control command, a rotating speed control mode with a rotating speed control value as a set value is adopted to control the driving motor;
when the motor controller MCU receives a command for controlling the rotation speed of the driving motor sent by the whole vehicle control unit HCU, controlling the driving motor executing mechanism to execute a set rotation speed value;
when the control unit HCU monitors that the rotating speed of the driving motor reaches a set value, the gearbox TCU is controlled to slowly close the clutch, so that the rotating shaft of the driving motor drives the engine intermediate shaft to slowly rotate.
4. The method for starting an engine of a parallel hybrid electric vehicle according to claim 3, wherein after the clutch is combined, the driving motor drives the engine to coaxially rotate with the driving motor through an intermediate shaft, and after the rotational speed of the engine is determined to reach a set value and be stable, the process of starting the engine is completed specifically includes:
when the clutch is completely closed, the driving motor and the engine are coaxially rotated, and meanwhile, the engine ECU sends a current rotating speed signal to the whole vehicle control unit HCU;
when the rotation speed of the engine is monitored by the whole vehicle control unit HCU to be larger than the starting threshold value for a period of time, the rotation speed of the engine is maintained to be in an idle speed control state and is kept stable, the rotation speed of the driving motor is not controlled by the whole vehicle control unit HCU, the clutch is disconnected, and the starting of the engine is completed.
5. The method for starting an engine of a parallel hybrid electric vehicle according to claim 3, wherein when the driving motor receives a motor enabling signal sent by the whole vehicle control unit HCU, and a motor system is judged to have no major fault, and a control command from the whole vehicle control unit HCU is received, the control command includes a torque control mode, a torque control value, a rotation speed control mode, and a rotation speed control value, and the rotation speed control command and the torque control command select only one control mode at the same time.
6. The method for starting an engine of a parallel hybrid electric vehicle according to claim 3, wherein when the complete vehicle control unit HCU monitors that the driving motor is ready to receive a control command, the driving motor is controlled by sending a torque rotation speed control message TSC1 satisfying the J1939 protocol, and a rotation speed control mode in which a rotation speed control value is a set value is adopted.
7. The method for starting an engine of a parallel hybrid vehicle according to claim 1, wherein when the high-voltage allowable power-up condition is determined, the determination condition includes the following information: the gearbox is in a neutral state, the high-voltage battery BMS system has no three-level faults, the motor MCU system has no three-level faults, and the insulation system has no faults.
8. The method for starting an engine of a parallel hybrid vehicle according to any one of claims 1 to 7, wherein the vehicle control unit HCU is a vehicle control unit HCU controlled by an integrated starting module.
CN202111298097.5A 2021-11-04 2021-11-04 Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type Pending CN116061914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111298097.5A CN116061914A (en) 2021-11-04 2021-11-04 Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111298097.5A CN116061914A (en) 2021-11-04 2021-11-04 Method for starting engine by parallel connection of oil-electricity hybrid power vehicle type

Publications (1)

Publication Number Publication Date
CN116061914A true CN116061914A (en) 2023-05-05

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Country Link
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