CN110949128A - Power shifting gearbox control system and control method thereof - Google Patents
Power shifting gearbox control system and control method thereof Download PDFInfo
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- CN110949128A CN110949128A CN201911184356.4A CN201911184356A CN110949128A CN 110949128 A CN110949128 A CN 110949128A CN 201911184356 A CN201911184356 A CN 201911184356A CN 110949128 A CN110949128 A CN 110949128A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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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
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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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
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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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
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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
- 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
- B60W2710/083—Torque
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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
- 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
Abstract
The invention relates to the technical field of vehicle transmission systems, in particular to a power gear shifting gearbox control system and a control method thereof. The power gear-shifting gearbox control system comprises a power gear-shifting gearbox, a power gear-shifting control valve group, a main driving motor, an auxiliary driving motor, an engine, a plunger pump, a controller, a pressure sensor, a front driving axle and a rear driving axle, wherein the main driving motor is installed at the normally-open input end of the power gear-shifting gearbox, the auxiliary driving motor is installed at the disconnectable input end of the power gear-shifting gearbox, and the power gear-shifting control valve group is connected with the power gear-shifting gearbox and controls the connection or disconnection of the disconnectable input end of the power gear-shifting gearbox and the auxiliary driving motor. According to the control system and the control method of the power gear shifting gearbox, uninterrupted power gear shifting is realized through the electric control system, the operability is good, the action response is timely, the gear shifting efficiency is high, the impact and the abrasion of a gear shifting process on the dynamic friction plate and the static friction plate are reduced, and the working reliability of the dynamic friction plate and the static friction plate is ensured.
Description
Technical Field
The invention relates to the technical field of vehicle transmission systems, in particular to a power gear shifting gearbox control system and a control method thereof.
Background
Off-road vehicles, work machines and agricultural tractors are another important form of vehicle relative to on-road vehicles, which are referred to as off-road vehicles. Almost all non-road vehicles are four-wheel drive, and with the continuous progress of science and technology, the four-wheel drive and hydraulic devices are more and more widely applied.
Because non-road vehicles generally have large dead weight, high requirements on climbing slope, high running driving torque (power) and large running driving torque variation range, although a hydraulic driving system with a large speed change range is adopted, the requirements are often difficult to meet. In order to solve the requirements of two working conditions of low-speed large torque and high-speed transition, a gearbox capable of shifting gears is added in a hydraulic transmission system of many vehicles, and the transmission system still has a plurality of defects when in use, such as: (1) the gearbox can only realize parking gear shifting, and has low gear shifting efficiency, poor safety and inconvenient operation; (2) the dynamic friction plate and the static friction plate are impacted and abraded greatly in the gear shifting process, the working reliability of the dynamic friction plate and the static friction plate is reduced, and the service life of the dynamic friction plate and the static friction plate is prolonged.
Disclosure of Invention
The invention aims to provide a control system and a control method of a power gear shifting gearbox, and overcomes the defects that only parking gear shifting can be realized, the gear shifting efficiency is low, the safety is poor, the operation is inconvenient, and the impact and the abrasion of a gear shifting process on a dynamic friction sheet and a static friction sheet are large in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a powershift transmission control system, characterized by: comprises a power gear shifting gearbox, a power gear shifting control valve group, a main driving motor, an auxiliary driving motor, an engine, a plunger pump, a controller, a pressure sensor, a front driving axle and a rear driving axle, the main driving motor is installed at the normally-open input end of the power gear shifting gearbox, the auxiliary driving motor is installed at the disconnectable input end of the power gear shifting gearbox, the power gear shifting control valve bank is connected with the power gear shifting gearbox and controls the connection or disconnection of the disconnectable input end of the power gear shifting gearbox and the auxiliary driving motor, a first output shaft of the power gear shifting gearbox is connected with a front driving axle of a vehicle through a first universal shaft coupler, a second output shaft of the power gear shifting gearbox is connected with a rear driving axle of the vehicle through a second universal shaft coupler, the plunger pump is installed on an engine, the main driving motor and the auxiliary driving motor are both connected with the plunger pump, and a pressure sensor is installed on a connecting pipeline of the main driving motor and the plunger pump; the controller is electrically connected with a rotating speed sensor of the main driving motor, receives a rotating speed signal of the main driving motor, is electrically connected with a variable proportional valve of the main driving motor, realizes displacement and torque control of the main driving motor, is electrically connected with a rotating speed sensor of an auxiliary driving motor, receives a rotating speed signal of the auxiliary driving motor, is electrically connected with a variable proportional valve of the auxiliary driving motor, realizes displacement and torque control of the auxiliary driving motor, is electrically connected with a power gear shifting control valve set, sends a control instruction to the power gear shifting control valve set, is electrically connected with a pressure sensor, receives a signal of the pressure sensor, is electrically connected with a plunger pump, controls the signal size of the variable proportional valve of the plunger pump, and further controls the displacement of the plunger pump.
Further, the controller still with vehicle FNR gear switch and accelerator pedal electric connection, receives FNR gear signal and accelerator pedal signal in real time.
Furthermore, the preset control parameters in the controller comprise a starting speed, a forced downshift stroke, a high-speed gear set speed and a gear-shifting set pressure, and the preset control subprogram in the controller comprises an auxiliary drive motor braking subprogram and an auxiliary drive motor accelerating subprogram.
Furthermore, the controller is a dual-core controller, the dual-core controller is equivalent to that the input ports of two common controllers are connected in parallel, the output ports are connected in series, the CPU operates independently, the main controller is monitored in real time through the monitoring program of the sub-controller, abnormal states are processed in time, and the controller has very high safety.
Furthermore, a communication port is arranged on the controller and connected with a computer, interaction between the controller and computer software is realized, and preset control parameters and preset control subprograms in the controller are adjusted through the computer software, so that the gear shifting time of the power gear shifting gearbox is adjusted, the individualized requirements of different vehicles are met, and optimal setting is performed on the configuration of a specific vehicle.
Further, the vehicle is a non-road vehicle.
A method of controlling a powershift transmission control system, comprising the steps of:
(1) and (3) electrifying self-checking: after a vehicle is electrified, a power gear shifting gearbox control system enters a system self-checking mode, after the self-checking is passed, the state of a gear switch is judged, if the gear switch is in a neutral gear, the parking braking mode is entered, and if the gear switch is not in the neutral gear, a signal of an accelerator pedal is waited for, and the gear shifting control state is entered;
(2) starting the vehicle: the controller receives FNR gear signals, accelerator pedal signals, main drive motor speed signals and auxiliary drive motor speed signals in real time, when the fact that the accelerator pedal stroke is smaller than a forced downshift stroke and the main drive motor speed is smaller than a starting speed is detected, the controller judges that the vehicle needs to be started and needs low-speed and high-torque drive, at the moment, the controller sends an instruction to the power gear shifting control valve group, gear shifting clutch signals of the power gear shifting control valve group are closed, the power gear shifting gearbox can be in a joint state of a clutch at the disconnected input end of the power gear shifting gearbox and the auxiliary drive motor, the auxiliary drive motor and the main drive motor are simultaneously connected to the power gear shifting gearbox, the power gear shifting gearbox outputs high torque, and the torque output by the power gear shifting gearbox is respectively transmitted to a front drive axle and a rear drive axle to;
(3) after the vehicle starts: the method comprises the steps that with the continuous increase of the vehicle speed, the driving torque demand is greatly reduced, a controller receives a main driving motor rotating speed signal, an auxiliary driving motor rotating speed signal and an accelerator pedal signal in real time, when the fact that the speed of a main driving motor is larger than a high-speed gear set speed in the controller is detected, the controller judges that a gear shifting condition is achieved, the controller sends an instruction to a power gear shifting control valve group at the moment, a power gear shifting gearbox can disconnect an input end clutch from the auxiliary driving motor and is driven by the main driving motor alone to achieve high-speed running of a vehicle, meanwhile, the controller starts an internal auxiliary driving motor braking subprogram to control the auxiliary driving motor to achieve braking and stopping, and the controller changes the variable proportional valve signal of a plunger pump according to a received pressure sensor signal;
(4) in the driving process: the main driving motor is driven independently, the controller judges according to the received rotating speed signal of the main driving motor, the pressure signal of the pressure sensor and the accelerator pedal signal, when the pressure of the pressure sensor is detected to be greater than the gear-shifting set pressure, the controller judges that the main driving motor cannot provide enough torque independently, at the moment, the controller starts an internal auxiliary driving motor acceleration subprogram, firstly calculates the target rotating speed of the auxiliary driving motor according to the current rotating speed of the main driving motor, and then outputs a control signal to the auxiliary driving motor proportional valve and the plunger pump to accelerate the auxiliary driving motor, because the controller simultaneously controls the displacement of the plunger pump and the displacement of the auxiliary driving motor, the acceleration of the auxiliary driving motor can be controlled to the maximum extent, and the closed-loop control is realized according to the rotating speed sensor on the auxiliary driving motor, and the gear-shifting speed is reached in the shortest time, the gear shifting time is shortened, when the rotating speed of the auxiliary driving motor reaches the target rotating speed, the relative speed of the dynamic and static friction plates of the gear shifting clutch is the lowest, the controller sends an instruction to the power gear shifting control valve group to enable the auxiliary driving motor to be connected with the clutch of the input end of the power gear shifting gearbox, the main driving motor and the auxiliary driving motor are simultaneously connected into the power gear shifting gearbox, the large torque output is provided, and the torque requirement is met.
The invention has the beneficial effects that: compared with the prior art, the control system and the control method of the power shifting gearbox have the following advantages: (1) the electric control system is used for realizing uninterrupted power gear shifting, and has the advantages of good operability, timely action response and high gear shifting efficiency; (2) the controller controls the displacement of the plunger pump and the displacement of the auxiliary driving motor at the same time, so that the acceleration of the auxiliary driving motor can be controlled to the maximum extent, closed-loop control is realized according to a rotating speed sensor on the auxiliary driving motor, the gear shifting speed is reached in the shortest time, the gear shifting time is shortened, when the rotating speed of the auxiliary driving motor reaches the target rotating speed, the relative speed of a dynamic friction plate and a static friction plate of the gear shifting clutch is lowest, the impact and the abrasion of the gear shifting process on the dynamic friction plate and the static friction plate are reduced, the working reliability of the dynamic friction plate and the static friction plate is ensured, and; (3) the preset control parameters and the preset control subprogram in the controller are adjusted through computer software, so that the gear shifting time of the power gear shifting gearbox is adjusted, the individual requirements of different vehicles are met, and the optimal setting is carried out on the configuration of a specific vehicle.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a logic block diagram of embodiment 2 of the present invention;
the system comprises a power shifting gearbox 1, a power shifting control valve group 2, a main driving motor 3, an auxiliary driving motor 4, an engine 5, a plunger pump 6, a controller 7, a pressure sensor 8, a front driving axle 9, a rear driving axle 10, a first output shaft 11 and a second output shaft 12.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the embodiment shown in fig. 1, a power shift gearbox control system comprises a power shift gearbox 1, a power shift control valve group 2, a main drive motor 3, a secondary drive motor 4, an engine 5, a plunger pump 6, a controller 7, a pressure sensor 8, a front drive axle 9 and a rear drive axle 10, wherein the main drive motor 3 is installed at the normally-open input end of the power shift gearbox 1, the secondary drive motor 4 is installed at the disconnectable input end of the power shift gearbox 1, the power shift control valve group 2 is connected with the power shift gearbox 1 and controls the connection or disconnection of the disconnectable input end of the power shift gearbox 1 and the secondary drive motor 4, a first output shaft 11 of the power shift gearbox 1 is connected with the front drive axle 9 of a vehicle through a first universal coupling, a second output shaft 12 of the power shift gearbox 1 is connected with the rear drive axle 10 of the vehicle through a second universal coupling, the plunger pump 6 is arranged on the engine 5, the main driving motor 3 and the auxiliary driving motor 4 are both connected with the plunger pump 6, and a pressure sensor 8 is arranged on a connecting pipeline of the main driving motor 3 and the plunger pump 6; the controller 7 is electrically connected with a rotating speed sensor of the main driving motor 3, receives a rotating speed signal of the main driving motor 3, the controller 7 is electrically connected with a variable proportional valve of the main driving motor, realizes the control of the displacement and the torque of the main driving motor 3, the controller 7 is electrically connected with a rotating speed sensor of the auxiliary driving motor 4, receives a rotating speed signal of the auxiliary driving motor 4, the controller 7 is electrically connected with the variable proportional valve of the auxiliary driving motor, realizes the control of the displacement and the torque of the auxiliary driving motor 4, the controller 7 is electrically connected with the power gear-shifting control valve group 2, sends a control instruction to the power gear-shifting control valve group 2, the controller 7 is electrically connected with the pressure sensor 8, receives a signal of the pressure sensor 8, the controller 7 is electrically connected with the plunger pump 6, controls the variable proportional valve signal of the plunger pump 6, and further controls the displacement of the plunger pump 6.
In this embodiment, controller 7 still with vehicle FNR gear switch and accelerator pedal electric connection, receive FNR gear signal and accelerator pedal signal in real time.
In this embodiment, the preset control parameters in the controller 7 include a starting speed, a forced downshift stroke, a high-speed gear setting speed, and a shift setting pressure, and the preset control subroutines in the controller 7 include a sub-drive motor braking subroutine and a sub-drive motor acceleration subroutine.
In this embodiment, the controller 7 is a dual-core controller, the dual-core controller is equivalent to two general controllers with their input ports connected in parallel and their output ports connected in series, the CPU operates independently, and monitors the main controller for real-time status by the monitoring program of the sub-controller, and handles abnormal status in time, thus having very high safety.
In this embodiment, the controller 7 is provided with a communication port, the communication port is connected with a computer, interaction between the controller 7 and computer software is realized, and the computer software is used for adjusting preset control parameters and preset control subroutines in the controller 7, so that the gear shifting time of the power gear shifting transmission 1 is adjusted, the individualized requirements of different vehicles are met, and optimal setting is performed for the configuration of a specific vehicle.
In this embodiment, the vehicle is a non-road vehicle.
Example 2 based on example 1, a logic block diagram of a control method of example 2 is shown in fig. 2.
A method of controlling a powershift transmission control system, comprising the steps of:
(1) and (3) electrifying self-checking: after a vehicle is electrified, a power gear shifting gearbox control system enters a system self-checking mode, after the self-checking is passed, the state of a gear switch is judged, if the gear switch is in a neutral gear, the parking braking mode is entered, and if the gear switch is not in the neutral gear, a signal of an accelerator pedal is waited for, and the gear shifting control state is entered;
(2) starting the vehicle: the controller 7 receives FNR gear signals, accelerator pedal signals, main drive motor 3 rotating speed signals and auxiliary drive motor 4 rotating speed signals in real time, when the fact that the accelerator pedal stroke is smaller than the forced downshift stroke is detected, the main drive motor 3 motor speed is smaller than the starting speed, the controller 7 judges that the vehicle is started and needs low-speed and high-torque drive, at the moment, the controller 7 sends an instruction to the power shift control valve group 2, a shift clutch signal of the power shift control valve group 2 is turned off, a clutch at the input end of the power shift gearbox 1 can be disconnected and the auxiliary drive motor 4 is in a joint state, the auxiliary drive motor 4 and the main drive motor 3 are simultaneously connected into the power shift gearbox 1, the power shift gearbox 1 outputs high torque, and the torque output by the power shift gearbox 1 is respectively transmitted to the front drive axle 9 and the rear drive axle 10, so that the vehicle is started at low speed;
(3) after the vehicle starts: the method comprises the steps that with the continuous increase of the vehicle speed, the driving torque requirement is greatly reduced, a controller 7 receives a rotating speed signal of a main driving motor 3, a rotating speed signal of an auxiliary driving motor 4 and an accelerator pedal signal in real time, when the fact that the speed of the main driving motor 3 is larger than the set speed of a high-speed gear in the controller 7 is detected, the controller 7 judges that a gear shifting condition is achieved, the controller 7 sends an instruction to a power gear shifting control valve bank 2 at the moment, a power gear shifting gearbox 1 can disconnect an input end clutch from the auxiliary driving motor 4 and is independently driven by the main driving motor 3 to achieve high-speed running of a vehicle, meanwhile, the controller 7 starts a braking subprogram of the inner auxiliary driving motor 4 to control the auxiliary driving motor 4 to achieve braking and stopping, and the controller 7 changes the magnitude of a variable proportional valve signal of a plunger pump 6 according to the;
(4) in the driving process: the main driving motor 3 is driven independently, the controller 7 judges according to the received rotating speed signal of the main driving motor 3, the pressure signal of the pressure sensor 8 and the accelerator pedal signal, when the pressure of the pressure sensor 8 is detected to be larger than the gear-shifting set pressure, the controller 7 judges that the main driving motor 3 alone cannot provide enough torque, at this time, the controller 7 starts an internal auxiliary driving motor acceleration subprogram, firstly calculates the target rotating speed of the auxiliary driving motor 4 according to the current rotating speed of the main driving motor 3, and then outputs a control signal to the auxiliary driving motor proportional valve and the plunger pump 6 to accelerate the auxiliary driving motor 4, because the controller 7 simultaneously controls the displacement of the plunger pump 6 and the displacement of the auxiliary driving motor 4, the acceleration of the auxiliary driving motor 4 can be controlled to the maximum extent, and closed-loop control is realized according to the rotating speed sensor on the auxiliary driving motor 4, the gear shifting speed is achieved in the shortest time, the gear shifting time is shortened, when the rotating speed of the auxiliary driving motor 4 reaches the target rotating speed, the relative speed of a dynamic friction plate and a static friction plate of a gear shifting clutch is the lowest, the controller 7 sends an instruction to the power gear shifting control valve group 2 to enable the auxiliary driving motor 4 to be connected with a clutch at the input end of the power gear shifting gearbox 1, the main driving motor 3 and the auxiliary driving motor 4 are simultaneously connected into the power gear shifting gearbox 1, the large torque output is provided, and the torque requirement is met.
The above embodiments are only specific examples of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any suitable changes or modifications made by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A powershift transmission control system, characterized by: comprises a power gear shifting gearbox, a power gear shifting control valve group, a main driving motor, an auxiliary driving motor, an engine, a plunger pump, a controller, a pressure sensor, a front driving axle and a rear driving axle, the main driving motor is installed at the normally-open input end of the power gear shifting gearbox, the auxiliary driving motor is installed at the disconnectable input end of the power gear shifting gearbox, the power gear shifting control valve bank is connected with the power gear shifting gearbox and controls the connection or disconnection of the disconnectable input end of the power gear shifting gearbox and the auxiliary driving motor, a first output shaft of the power gear shifting gearbox is connected with a front driving axle of a vehicle through a first universal shaft coupler, a second output shaft of the power gear shifting gearbox is connected with a rear driving axle of the vehicle through a second universal shaft coupler, the plunger pump is installed on an engine, the main driving motor and the auxiliary driving motor are both connected with the plunger pump, and a pressure sensor is installed on a connecting pipeline of the main driving motor and the plunger pump; the controller is electrically connected with a rotating speed sensor of the main driving motor, receives a rotating speed signal of the main driving motor, is electrically connected with a variable proportional valve of the main driving motor, realizes displacement and torque control of the main driving motor, is electrically connected with a rotating speed sensor of an auxiliary driving motor, receives a rotating speed signal of the auxiliary driving motor, is electrically connected with a variable proportional valve of the auxiliary driving motor, realizes displacement and torque control of the auxiliary driving motor, is electrically connected with a power gear shifting control valve set, sends a control instruction to the power gear shifting control valve set, is electrically connected with a pressure sensor, receives a signal of the pressure sensor, is electrically connected with a plunger pump, controls the signal size of the variable proportional valve of the plunger pump, and further controls the displacement of the plunger pump.
2. A powershift transmission control system according to claim 1, wherein: the controller is still with vehicle FNR gear switch and accelerator pedal electric connection, receives FNR gear signal and accelerator pedal signal in real time.
3. A powershift transmission control system according to claim 1 or claim 2, wherein: the preset control parameters in the controller comprise a starting speed, a forced downshift stroke, a high-speed gear set speed and a gear-shifting set pressure, and the preset control subprogram in the controller comprises an auxiliary drive motor sub-program and an auxiliary drive motor acceleration subprogram.
4. A powershift transmission control system according to claim 3, wherein: the controller is a dual-core controller.
5. A powershift transmission control system according to claim 4, wherein: the controller is provided with a communication port which is connected with a computer to realize the interaction between the controller and computer software, and preset control parameters and preset control subprograms in the controller are adjusted through the computer software.
6. A powershift transmission control system according to claim 5, wherein: the vehicle is a non-road vehicle.
7. A control method of a powershift transmission control system according to claim 6, wherein: the method comprises the following steps:
(1) and (3) electrifying self-checking: after a vehicle is electrified, a power gear shifting gearbox control system enters a system self-checking mode, after the self-checking is passed, the state of a gear switch is judged, if the gear switch is in a neutral gear, the parking braking mode is entered, and if the gear switch is not in the neutral gear, a signal of an accelerator pedal is waited for, and the gear shifting control state is entered;
(2) starting the vehicle: the controller receives FNR gear signals, accelerator pedal signals, main drive motor speed signals and auxiliary drive motor speed signals in real time, when the fact that the accelerator pedal stroke is smaller than a forced downshift stroke and the main drive motor speed is smaller than a starting speed is detected, the controller judges that the vehicle needs to be started and needs low-speed and high-torque drive, at the moment, the controller sends an instruction to the power gear shifting control valve group, gear shifting clutch signals of the power gear shifting control valve group are closed, the power gear shifting gearbox can be in a joint state of a clutch at the disconnected input end of the power gear shifting gearbox and the auxiliary drive motor, the auxiliary drive motor and the main drive motor are simultaneously connected to the power gear shifting gearbox, the power gear shifting gearbox outputs high torque, and the torque output by the power gear shifting gearbox is respectively transmitted to a front drive axle and a rear drive axle to;
(3) after the vehicle starts: the method comprises the steps that with the continuous increase of the vehicle speed, the driving torque demand is greatly reduced, a controller receives a main driving motor rotating speed signal, an auxiliary driving motor rotating speed signal and an accelerator pedal signal in real time, when the fact that the speed of a main driving motor is larger than a high-speed gear set speed in the controller is detected, the controller judges that a gear shifting condition is achieved, the controller sends an instruction to a power gear shifting control valve group at the moment, a power gear shifting gearbox can disconnect an input end clutch from the auxiliary driving motor and is driven by the main driving motor alone to achieve high-speed running of a vehicle, meanwhile, the controller starts an internal auxiliary driving motor braking subprogram to control the auxiliary driving motor to achieve braking and stopping, and the controller changes the variable proportional valve signal of a plunger pump according to a received pressure sensor signal;
(4) in the driving process: the main driving motor is driven independently, the controller judges according to the received rotating speed signal of the main driving motor, the pressure signal of the pressure sensor and the accelerator pedal signal, when the pressure of the pressure sensor is detected to be larger than the gear-shifting set pressure, the controller judges that the main driving motor cannot provide enough torque independently, at the moment, the controller starts an internal auxiliary driving motor acceleration subprogram, firstly calculates the target rotating speed of the auxiliary driving motor according to the current rotating speed of the main driving motor, then outputs a control signal to an auxiliary driving motor proportional valve and a plunger pump to accelerate the auxiliary driving motor, when the rotating speed of the auxiliary driving motor reaches the target rotating speed, the relative speed of a dynamic friction plate and a static friction plate of a gear-shifting clutch is lowest, the controller sends an instruction to a power gear-shifting control valve group to connect the auxiliary driving motor with a clutch which can be disconnected and input end of a power gear-shifting gearbox, the main driving motor and the auxiliary driving motor are simultaneously connected into the power gear shifting gearbox, so that large torque output is provided, and the torque requirement is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184356.4A CN110949128A (en) | 2019-11-27 | 2019-11-27 | Power shifting gearbox control system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184356.4A CN110949128A (en) | 2019-11-27 | 2019-11-27 | Power shifting gearbox control system and control method thereof |
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| Publication Number | Publication Date |
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| CN110949128A true CN110949128A (en) | 2020-04-03 |
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| CN201911184356.4A Pending CN110949128A (en) | 2019-11-27 | 2019-11-27 | Power shifting gearbox control system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115289213A (en) * | 2022-06-22 | 2022-11-04 | 中国第一汽车股份有限公司 | Automatic transmission gear shifting force control method and system, automatic transmission and vehicle thereof |
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| CN115289213B (en) * | 2022-06-22 | 2024-03-22 | 中国第一汽车股份有限公司 | Automatic transmission gear shifting force control method and system, automatic transmission and vehicle |
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