CN117841662A - Parking power taking control system and control method for pure electric truck - Google Patents
Parking power taking control system and control method for pure electric truck Download PDFInfo
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- CN117841662A CN117841662A CN202311720140.1A CN202311720140A CN117841662A CN 117841662 A CN117841662 A CN 117841662A CN 202311720140 A CN202311720140 A CN 202311720140A CN 117841662 A CN117841662 A CN 117841662A
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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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a parking power take-off control system and a control method of a pure electric truck, wherein the parking power take-off control system comprises a power take-off switch (PTO), a pressure sensor, a power take-off electromagnetic valve, a power take-off device and a control system control, the system comprises a whole Vehicle Controller (VCU), a gearbox controller (TCU) and a Motor Controller (MCU), the PTO1 rocker switch is arranged in a cab, and the switch can be opened when the power take-off requirement exists; the invention relates to a method for acquiring power output from a chassis driving motor through a power takeoff on a pure electric dump truck, which comprises the steps of judging and analyzing the power take-off condition by a VCU, detecting the engagement state of the power takeoff by the TCU, outputting a target rotating speed according to the opening and closing degree of an accelerator, then controlling the power takeoff to work, monitoring the state of a vehicle in real time by a control system in the power take-off process, and making an exit power take-off mode to ensure the safety of a whole vehicle system.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a parking power taking control system and a parking power taking control method for a pure electric truck.
Background
The market share of new forms of energy commercial vehicles increases fast. For most new energy sources from unloading heavy trucks, the power for the loading comes from the power take-off of the chassis gearbox. The advantages of convenience in use, reliability, low cost and the like of the power takeoff become standard configuration of the new energy self-discharging heavy truck, but more severe control requirements are also provided for power takeoff control.
Disclosure of Invention
The invention aims to provide a power takeoff for solving the problem that most of new energy is from a heavy truck, and the power is from a chassis gearbox. The advantages of convenience in use, reliability, low cost and the like of the power takeoff are becoming standard configuration of the new energy self-discharging heavy truck, but the power takeoff also has the problem of providing more severe control requirements for power takeoff control.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the parking power take-off control system of the electric truck comprises a power take-off switch (PTO) 1, a pressure sensor 2, a power take-off electromagnetic valve 3, a power take-off 4 and a control system, wherein the system comprises a whole Vehicle Controller (VCU) 5, a gearbox controller (TCU) 6 and a Motor Controller (MCU) 7.
The PTO1 rocker switch is arranged in a cab, the switch CAN be turned on when the power take-off requirement exists, the pressure sensor 2 participates in the engagement detection of the power take-off device 4, the power take-off device 4 successfully outputs low level in an engaged mode, otherwise, the power take-off device 4 is in a suspended state, the power take-off device 4 is connected with a gearbox and a rear-end load device, and the VCU5, the TCU6 and the MCU7 are connected on one path of CAN.
The TCU6 is connected with the force taking electromagnetic valve 3 through a hard wire and controls the on-off of the force taking electromagnetic valve 3.
The power take-off solenoid valve 3 is connected with the power take-off 4 through an air pipe, and when the power take-off solenoid valve 3 is opened, a high-pressure air source is supplied to the power take-off 4 to control engagement of the power take-off 4.
The pressure sensor 2 is connected with the TCU6 through a hard wire, and acquires the engagement signal of the power takeoff 4 to the TCU6.
A method for controlling parking power of an electric truck, characterized in that the method comprises the following steps of;
s1, performing S1; pressing the power take-off switch, and sending a high-level hard wire signal to the VCU5;
s2, performing S2; VCU5 judges the condition, send the closed request message of the power takeoff;
s3, performing S3; MCU7 receives the request message, change from torque control mode to rotational speed control mode, TCU6 receives the message, send the low-level hard wire signal to control the power take-off solenoid valve 3 to switch on, the high-pressure air supply is given to the power take-off 4 to control and gear engagement of the gear box, the pressure sensor 2 outputs the low-level hard wire signal to TCU6, TCU6 sends the successful message of power take-off engagement, VCU5 enters rotational speed control mode;
s4, performing S4; when the accelerator pedal is depressed, the VCU5 sends a corresponding motor target rotating speed request according to the depth of the accelerator pedal, and the MCU7 responds to the VCU5 rotating speed request to control the motor and then control the power takeoff 4 to work.
The VCU in S2 judges that the power taking operation is allowed to be carried out under the following conditions;
(6) The power takeoff switch is effective;
(7) The accelerator pedal opening is 0;
(8) The Ready signal is active;
(9) The shift request is N-gear, and the actual gear is N-gear;
(10) The absolute value of the vehicle speed is less than or equal to 3km/h;
the above is a sum relationship.
In the step S4, the VCU outputs a corresponding motor target rotating speed message according to the depth of the accelerator pedal, and when the accelerator opening is less than or equal to 10%, the VCU judges that the operation is wrong and maintains the current state; when the throttle opening and closing degree is more than or equal to 10% and less than or equal to 50%, and lasts for more than 1 second, and the braking signal is invalid, the rotating speed command is activated for 800rpm; when the throttle opening and closing degree is less than or equal to 50 percent and less than or equal to 100 percent and lasts for 1 second, the target rotating speed is subjected to linear table look-up according to the opening degree of the throttle pedal (the rotating speed corresponding to 50 percent to 100 percent of the opening degree is instructed to 800 rpm-peak rotating speed), and the peak rotating speed is determined according to the load parameter at the rear end of the power takeoff; if the brake pedal is stepped on or the power take-off switch is closed or the whole vehicle power-off mark is effective and lasts for 1 second, the target rotating speed is cleared, and the rotating speed instruction sent to the motor is regulated to be smoothed.
In the step S3, the TCU6 detects the engagement state of the power takeoff, and if the engagement is unsuccessful, the fault state needs to be uploaded, and the VCU5 does not execute the next working instruction.
In S2, VCU5 determines that any one of the allowable power take-off operating conditions is not satisfied, and determines that the power take-off request is invalid.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a method for acquiring power output from a chassis driving motor through a power takeoff on a pure electric dump truck, which comprises the steps of judging and analyzing the power take-off condition by a VCU, detecting the engagement state of the power takeoff by the TCU, outputting a target rotating speed according to the opening and closing degree of an accelerator, then controlling the power takeoff to work, monitoring the state of a vehicle in real time by a control system in the power take-off process, and making an exit power take-off mode to ensure the safety of a whole vehicle system.
Drawings
FIG. 1 is a schematic diagram of a control system of the present invention;
fig. 2 is a flow chart of the control method of the present invention.
In the figure: 1. a PTO; 2. a pressure sensor; 3. a force-taking electromagnetic valve; 4. a power take-off; 5. VCU; 6. a TCU; 7. and (3) an MCU.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the present invention are all within the protection scope of the present invention.
An electric truck parking power take-off control system includes a power take-off switch (PTO) 1, a pressure sensor 2, a power take-off solenoid valve 3, a power take-off 4, and a control system including: a Vehicle Control Unit (VCU) 5, a gearbox control unit (TCU) 6 and a Motor Control Unit (MCU) 7.
The PTO1 rocker switch is arranged in a cab, the switch CAN be turned on when the power take-off requirement exists, the pressure sensor 2 participates in the engagement detection of the power take-off device 4, the power take-off device 4 successfully outputs low level in an engaged mode, otherwise, the power take-off device 4 is in a suspended state, the power take-off device 4 is connected with a gearbox and a rear-end load device, and the VCU5, the TCU6 and the MCU7 are connected on one path of CAN.
The TCU6 is connected with the force taking electromagnetic valve 3 through a hard wire and controls the on-off of the force taking electromagnetic valve 3.
The power take-off solenoid valve 3 is connected with the power take-off 4 through an air pipe, and when the power take-off solenoid valve 3 is opened, a high-pressure air source is supplied to the power take-off 4 to control engagement of the power take-off 4.
The pressure sensor 2 is connected with the TCU6 through a hard wire, and acquires the engagement signal of the power takeoff 4 to the TCU6.
The specific control implementation scheme of the parking power take-off control method of the electric truck is as follows:
s1, performing S1; pressing down the power take-off switch, and giving a high-level hard-wire signal to the VCU;
S2/S3; the VCU determines the following conditions: if the power takeoff switch is effective, the accelerator opening is 0, the Ready signal is effective, the gear shifting request is N gear, the actual gear is N gear, and the absolute value of the vehicle speed is less than or equal to 3km/h, a power takeoff closing request message is sent, and otherwise, the uploading power takeoff request is invalid;
s4, performing S4; the MCU receives the request message and changes the torque control mode into a rotating speed control mode; the TCU receives the request message, sends a low-level hard wire signal to control the power take-off solenoid valve to be conducted, and supplies a high-pressure air source to the power take-off device to control the engagement with the gear of the gearbox. The pressure sensor outputs a low-level hard wire signal to the TCU, the TCU sends a successful engagement message of the power takeoff, and the VCU enters a rotating speed control mode;
S5/S6; the VCU outputs a corresponding motor target rotating speed message according to the depth of the accelerator pedal. When the opening of the accelerator is less than or equal to 10%, the VCU judges that the accelerator is in misoperation, and the current state is maintained; when the accelerator opening is more than or equal to 10% and less than or equal to 50%, and lasts for more than 1S, and the braking signal is invalid, the rotating speed command is activated for 800rpm;
S7/S8; when the accelerator opening is more than 50 percent and less than or equal to 100 percent and lasts for more than 1S, the target rotating speed is subjected to linear table look-up according to the accelerator pedal opening (the rotating speed corresponding to 50 percent to 100 percent of the opening is instructed to 800 rpm-peak rotating speed), and the peak rotating speed is determined according to the load parameter at the rear end of the power takeoff; the target rotating speed instruction sent to the motor is regulated to carry out smoothing treatment;
s9, performing S9; in the power take-off working process, if the VCU detects a gear engaging signal, judging that the gear is invalid;
s10, performing S10; in the power take-off working process, detecting a braking signal and continuing for 1S, resetting the target rotating speed, closing a power take-off switch, and exiting the power take-off mode;
s11, performing S11; in the working process of taking force, the taking force switch is closed, the target rotating speed is cleared, and the taking force mode is exited;
s12, performing S12; in the power take-off working process, the whole vehicle triggers a power-down sign, the target rotating speed is cleared, the power take-off mode is exited, and a fault is reported.
And (3) a power-down sign:
(1) The charging interlock is effective;
(2) High-pressure emergency breaking is effective;
(3) BMS requests that the off-high voltage is valid;
(4) The highest-level fault 2s of the whole vehicle is effective;
(5) The power-down indicator is valid when power is changed;
(6) The ON gear signal is invalid and has no charge wake-up signal;
(1) The relation of (6) or (6) is continued for 0.2s.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, and that the foregoing embodiments and description are merely preferred embodiments of the invention, and are not intended to limit the invention, but that various changes and modifications may be made therein without departing from the novel spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a pure electric truck parking power take-off control system, a serial communication port, including PTO (1), pressure sensor (2), power take-off solenoid valve (3), power takeoff (4) and control system, control system includes VCU (5), TCU (6) and MCU (7), PTO (1) rocker switch arrangement is in the driver's cabin, CAN open the switch when having the power take-off demand, the meshing detection of power takeoff (4) is participated in pressure sensor (2), power takeoff (4) meshing successfully exports low level, otherwise be unsettled state, power takeoff (4) connect gearbox and rear end load device, VCU (5), TCU (6) and MCU (7) are connected on a way CAN.
2. The parking power take-off control system of a pure electric truck according to claim 1, wherein the TCU (6) is connected with the power take-off solenoid valve (3) through a hard wire, and controls the power take-off solenoid valve (3) to be turned on or off.
3. The parking power take-off control system of a pure electric truck according to claim 1, characterized in that the power take-off solenoid valve (3) is connected with the power take-off (4) through an air pipe, and when the power take-off solenoid valve (3) is opened, a high-pressure air source is supplied to the power take-off (4) to control the engagement thereof.
4. The electric-only truck parking power take-off control system according to claim 1, characterized in that the pressure sensor (2) is connected with the TCU (6) through a hard wire, and acquires an engagement signal of the power take-off (4) to the TCU (6).
5. A method for controlling parking power of a pure electric truck, characterized in that the parking power control system of the electric truck according to any one of claims 1-4 is utilized, comprising the following steps;
s1, performing S1; pressing the power take-off switch, and sending a high-level hard-wire signal to the VCU (5);
s2, performing S2; VCU (5) judges the condition, send the closed request message of the power takeoff;
s3, performing S3; the MCU (7) receives a request message, the torque control mode is changed into the rotating speed control mode, the TCU (6) receives the message, the low-level hard wire signal is sent to control the power taking electromagnetic valve (3) to be conducted, the high-pressure air source is supplied to the power taking device (4) to control the engagement with the gear of the gearbox, the pressure sensor (2) outputs the low-level hard wire signal to the TCU (6), the TCU (6) sends a successful message of the engagement of the power taking device, and the VCU (5) enters the rotating speed control mode;
s4, performing S4; when the accelerator pedal is depressed, the VCU (5) sends a corresponding motor target rotating speed request according to the depth of the accelerator pedal, and the MCU (7) responds to the VCU (5) rotating speed request to control the motor and then control the power takeoff (4) to work.
6. The electric-only truck parking power take-off control method according to claim 5, wherein the VCU judging in S2 that the power take-off is permitted includes the following conditions;
(1) The power takeoff switch is effective;
(2) The accelerator pedal opening is 0;
(3) The Ready signal is active;
(4) The shift request is N-gear, and the actual gear is N-gear;
(5) The absolute value of the vehicle speed is less than or equal to 3km/h;
the above is a sum relationship.
7. The method for controlling parking power take-off of a pure electric truck according to claim 5, wherein the VCU in S4 outputs a corresponding motor target rotation speed message according to the depth of an accelerator pedal, and when the accelerator opening is less than or equal to 10%, the VCU determines that the vehicle is in a wrong operation state, and maintains the current state; when the throttle opening and closing degree is more than or equal to 10% and less than or equal to 50%, and lasts for more than 1 second, and the braking signal is invalid, the rotating speed command is activated for 800rpm; when the throttle opening and closing degree is less than or equal to 50 percent and less than or equal to 100 percent and lasts for 1 second, the target rotating speed is subjected to linear table look-up according to the opening degree of the throttle pedal (the rotating speed corresponding to 50 percent to 100 percent of the opening degree is instructed to 800 rpm-peak rotating speed), and the peak rotating speed is determined according to the load parameter at the rear end of the power takeoff; if the brake pedal is stepped on or the power take-off switch is closed or the whole vehicle power-off mark is effective and lasts for 1 second, the target rotating speed is cleared, and the rotating speed instruction sent to the motor is regulated to be smoothed.
8. The method for controlling parking power take-off of a pure electric truck according to claim 5, wherein the TCU (6) in S3 detects the power take-off engagement state, and if the engagement is unsuccessful, a fault state is required to be uploaded, and the VCU (5) does not execute the next working instruction.
9. The electric-only truck parking power take-off control method according to claim 6, wherein the VCU (5) in S2 determines that any one of the allowable power take-off operating conditions is not satisfied, and determines that the power take-off request is invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311720140.1A CN117841662A (en) | 2023-12-14 | 2023-12-14 | Parking power taking control system and control method for pure electric truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311720140.1A CN117841662A (en) | 2023-12-14 | 2023-12-14 | Parking power taking control system and control method for pure electric truck |
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| Publication Number | Publication Date |
|---|---|
| CN117841662A true CN117841662A (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311720140.1A Pending CN117841662A (en) | 2023-12-14 | 2023-12-14 | Parking power taking control system and control method for pure electric truck |
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| Country | Link |
|---|---|
| CN (1) | CN117841662A (en) |
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- 2023-12-14 CN CN202311720140.1A patent/CN117841662A/en active Pending
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