Electric control system for automobile power take-off and high-voltage power generation

Abstract

The utility model discloses an electric control system for automobile power take-off and high-voltage power generation. The system comprises a power take-off and high-voltage power generation controller, a hard wire input end, a hard wire output end and two paths of CAN wire input and output ends, the power take-off and high-voltage power generation controller is connected with various sensor signals, switch signals and various relays through a hardware input end; the power take-off and high-voltage power generation controller is connected with a plurality of components through two CAN lines. And the power take-off and high-voltage power generation controller is connected with vehicle cooling system equipment through a hardware output end. According to the utility model, the integration level is improved through the integration function of the power take-off controller and the high-voltage power generation controller and the cooperation of the CAN line and components. And the control convenience is enhanced by utilizing abundant interfaces, flexible switching and wireless control. By means of personnel state judgment, cooling system regulation and control and electrical insurance arrangement, safety and stability are guaranteed, and the problem of vehicle function integration and control is solved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle electronic control technology, specifically relating to an electronic control system for vehicle power take-off and high-voltage power generation. Background Technology

[0002] In modern engineering operations and special applications, some engine-powered vehicles undertake critical tasks. For example, urban sanitation sweepers rely on power to complete sweeping operations; concrete mixers depend on power to mix materials; and special vehicles supplying power to high-voltage equipment must stably deliver high-voltage electricity. This necessitates vehicles with power take-off (PTO) capabilities to output engine power to the working equipment; high-voltage generator capabilities to meet the power demands of high-voltage equipment; and PTO (Power Take-Off, referring to the engine operating at a set speed to meet the power requirements of specific equipment). However, current vehicles on the market have low integration of these three functions, with each functional module relatively independent, resulting in complex vehicle structures and large space occupation. Furthermore, control is inconvenient; drivers must manage multiple distributed control devices, which is both time-consuming and affects operational efficiency, making control extremely inconvenient and urgently requiring optimization and upgrading. Utility Model Content

[0003] To address the problems raised in the background technology, this utility model proposes an electronic control system for automotive power take-off and high-voltage power generation, comprising: a power take-off and high-voltage power generation controller, a hard-wired input terminal, a hard-wired output terminal, and two CAN line input / output terminals;

[0004] The power take-off and high-voltage generator controller is connected to various sensor signals, switch signals and various relays through hardware input terminals to control the closing of power take-off and power generation related relays and the lighting of status lights; the power take-off and high-voltage generator controller communicates with multiple components through two CAN lines; the power take-off and high-voltage generator controller is connected to the vehicle cooling system equipment through hardware output terminals.

[0005] Furthermore, the power take-off and high-voltage generator controller includes an input circuit, an output circuit, an A / D converter, a microcontroller, a CAN transceiver, a radio receiving module, and a radio transmitting module;

[0006] Signals or information are transmitted to the microcontroller for processing through the input circuit, A / D converter, and radio receiver module; the processing results are then sent to the outside through the output circuit, CAN transceiver module, and transmitter module.

[0007] Furthermore, the hard-wired input terminal includes multiple input interfaces, which are respectively connected to various vehicle sensors, including an in-vehicle ambient temperature sensor, a seat 1 temperature sensor, a seat 2 temperature sensor, a seat 1 pressure sensor, a seat 2 pressure sensor, a wheel speed signal sensor, and a key signal. The hard-wired input terminal is also connected to various switches via multiple input interfaces, including a three-state switch, a four-state switch, a parking brake switch, a generator switch, a power take-off switch, and a PTO switch. The PTO switch signal is used to enter PTO mode, which can only be entered when the vehicle is parked; the three-state switch is used to set the PTO speed adjustment mode; and the four-state switch is used to select four different PTO speeds.

[0008] Furthermore, the signals from the in-vehicle ambient temperature sensor, seat 1 temperature sensor, seat 2 temperature sensor, seat 1 pressure sensor, and seat 2 pressure sensor are used to determine whether there are people in the driver's seat 1 or the front passenger seat 2; the parking brake switch and wheel speed signal are used to determine whether the vehicle is in a parked or moving state; the generator switch is used to confirm the user's power generation needs; the power take-off switch is used to confirm the user's power take-off needs; and the key signal is used to confirm the vehicle status.

[0009] Furthermore, the three-state switch is connected to two pins of the power take-off and high-voltage generator controller. The middle state is the PTO speed holding mode, and the other two states are the PTO speed increase mode and the PTO speed decrease mode, respectively. The four-state switch is connected to the other pin of the power take-off and high-voltage generator controller. According to the different resistances on the input line of the four-state switch, the power take-off and high-voltage generator controller measures different voltages and determines the switch position based on the different voltage signals to determine different PTO speed requirements.

[0010] The technical benefits of the aforementioned three-state and four-state switches include: the design of the three-state and four-state switches provides a flexible way to adjust the PTO speed. The three-state switch can set the adjustment mode of the PTO speed (speed increase, speed decrease, speed hold), and the four-state switch can select four different PTO speeds. Users can quickly adjust the PTO speed according to actual needs to meet the power requirements of specific equipment under different working conditions. The operation is simple and convenient.

[0011] Furthermore, the vehicle cooling system includes a fan and a water pump. The power take-off and high-voltage generator controller is sequentially connected to the fan and water pump via the water pump PWM signal output terminal and the fan PWM signal output terminal in the hardware output terminal. The power take-off and high-voltage generator controller adjusts the PWM duty cycle of the fan and water pump according to the received cooling system temperature signal. The technical effects include: the power take-off and high-voltage generator controller adjusts the PWM duty cycle of the fan and water pump according to the received cooling system temperature signal, ensuring that components such as the generator operate in a suitable temperature environment, improving the stability and reliability of the system, and reducing equipment failures and performance degradation caused by overheating.

[0012] Furthermore, the hardware output terminal is also connected to a fan relay, a power take-off solenoid valve relay, a generator control power supply relay, a power take-off status light, a generator status light, and a PTO mode light. The power take-off and high-voltage generator controllers select either PWM control or fan relay control for the fan control type based on the calibrated value. The generator control power supply relay is used to control the power supply to the high-voltage generator controller, the high-voltage distribution box controller, and the supercapacitor controller. A fuse is installed on the control circuit of the generator control power supply relay. A fuse and a solenoid valve are installed on the control circuit of the power take-off solenoid valve. This prevents damage to the system due to electrical faults such as short circuits, ensuring the electrical safety of the system.

[0013] Furthermore, of the two CAN input / output terminals, one CAN network 1 is connected to the high-voltage generator, high-voltage distribution box, supercapacitor, and power take-off unit, and is used for communication between the power take-off unit and the high-voltage generator controller and the high-voltage generator, high-voltage distribution box, supercapacitor, and power take-off unit; the other CAN network 2 is connected to the engine controller and instruments, and is used for communication between the power take-off unit and the high-voltage generator controller and the engine controller and instruments.

[0014] Furthermore, it also includes a wireless controller, which is wirelessly connected to the power take-off and high-voltage generator controller. The power take-off and high-voltage generator controller performs corresponding control operations based on the radio signals received from the wireless controller. These control operations include controlling the power take-off, generator operation, parking brake, and adjusting the PTO speed. The power take-off and high-voltage generator controller only receives the control signals from the wireless controller when it determines that there are no occupants in the driver's or passenger's seat. The technical advantages include: further improving the convenience of control, allowing users to operate the vehicle from a certain distance without the need for cumbersome operations inside the driver's cab.

[0015] The beneficial effects of this utility model include:

[0016] This utility model integrates multiple control functions. The power take-off and high-voltage generator controller receives various sensor signals and switch signals through the hard-wired input terminal, controls the engine to enter PTO mode, adjusts the PTO speed, and controls the power take-off and generator-related relays to close when the conditions are met. This allows the vehicle's power take-off, high-voltage generator and PTO functions to operate in an orderly manner under the coordination of a single controller, improving the integration of the three functions and avoiding the complex structure and high cost problems caused by multiple independent control systems.

[0017] This invention enables data sharing and collaborative operation between different components through two CAN input / output lines, allowing the power take-off, power generation, and PTO functions to be dynamically adjusted according to the overall operating status of the vehicle, further enhancing the degree of functional integration.

[0018] This invention connects to an in-vehicle ambient temperature sensor, seat pressure sensor, wheel speed signal sensor, key signal, and various switches via hard-wired input terminals. These interfaces acquire real-time vehicle status information and user operation commands, providing comprehensive data support for the power take-off and high-voltage generator controller. Users can flexibly and conveniently control vehicle functions by operating these switches. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the power take-off and high-voltage power generation control system;

[0020] Figure 2 This is a diagram of the CAN network topology;

[0021] Figure 3 This is a schematic diagram of the power take-off and high-voltage generator controller. Detailed Implementation

[0022] The following detailed embodiments are provided to explain the technical solution of this utility model, so that those skilled in the art can understand this utility model. The protection scope of this utility model is not limited to the following specific embodiments. Any modifications or improvements made by those skilled in the art that incorporate the technical solution of this utility model but differ from the following detailed embodiments are also within the protection scope of this utility model.

[0023] This utility model embodiment provides an electronic control system for vehicle power take-off and high-voltage power generation, including:

[0024] Power take-off and high-voltage generator controller, hard-wired input terminal, hard-wired output terminal, 2-channel CAN line input and output terminal, wireless controller (such as remote control) and low-voltage power supply;

[0025] The power take-off and high-voltage generator controller includes at least an input circuit, an output circuit, an A / D converter, a microcontroller, a memory, a CAN transceiver module, a radio receiving module, and a radio transmitting module, such as... Figure 3As shown;

[0026] The signals or information input to the power take-off and high-voltage generator controller are transmitted to the microcontroller for calculation through the input circuit, A / D converter, CAN transceiver module and radio receiver module; the calculation results are sent to the external device connected to the power take-off and high-voltage generator controller through the output circuit, CAN transceiver module and radio transmitter module, and the calculation results are also stored in the memory if necessary.

[0027] like Figure 1 As shown, the hard-wired input terminal is connected to various sensors and switches in the vehicle, including an in-vehicle ambient temperature sensor, a seat 1 (driver's seat) temperature sensor, a seat 2 (passenger's seat) temperature sensor, a seat 1 pressure sensor, a seat 2 pressure sensor, a wheel speed signal sensor, a key signal, a three-state switch, a four-state switch, a parking brake switch, a generator switch, a power take-off switch, and a PTO switch.

[0028] The system uses a combination of signals from the in-vehicle ambient temperature sensor, seat 1 temperature sensor, seat 2 temperature sensor, seat 1 pressure sensor, and seat 2 pressure sensor to determine whether there is a person in the driver's or passenger's seat; wheel speed sensors are used to calculate vehicle speed; the parking brake switch and wheel speed signals are used to determine whether the vehicle is in a parked or moving state, and the PTO function can only be activated when the vehicle is in a parked state; the generator switch is used to confirm the user's power generation needs; the power take-off switch is used to confirm the user's power take-off needs; and the key signal is used to confirm the vehicle status, including at least the OFF, ON, and START positions.

[0029] The PTO switch signal is used to enter PTO mode, which can only be entered when the vehicle is parked; the three-state switch is used to set the PTO speed adjustment mode, and the wiring method is as follows. Figure 1 As shown, the two pins connected to the power take-off and high-voltage generator controller have the following states: the middle state is the speed holding mode, and the other two states are the PTO speed increase mode and the PTO speed decrease mode; the four-state switch is used to select four different PTO speeds, and is generally a knob. The wiring method is as follows: Figure 1 As shown, different resistances on the input line result in different voltages for the controller. Based on these different voltage signals, the controller determines the switch position and thus the required speed for each of the four states. If the four-state switch is active, the three-state switch is inactive.

[0030] The hard-wire output terminal is as follows Figure 1As shown, the system includes water pump PWM signal output, fan PWM signal output, fan relay, power take-off solenoid valve relay, generator control power supply relay, power take-off status light, generator status light, and PTO mode light. The power take-off and high-voltage generator controller selects either PWM control (a more precise method) or relay control (a simpler on / off control method) to control fan speed based on a calibrated value. The calibrated value refers to a pre-set numerical standard, typically determined based on the vehicle's specific performance parameters, cooling requirements, and the overall operating characteristics of the power take-off and high-voltage generator system. Generally, the calibrated value is set in the vehicle's ECU or related configuration files and is usually adjusted and configured using specific diagnostic equipment and software. Figure 2 As shown, the power supply relay for power generation control is used to control the power supply of the power generation component controller. The power supply of the power generation component controller includes: a high-voltage generator controller, a high-voltage distribution box controller, and a supercapacitor controller.

[0031] The connection between the power generation control relay and the high-voltage generator controller, high-voltage distribution box controller, and supercapacitor controller includes:

[0032] The normally open contacts of the power generation control relay are connected in series with the power supply lines of the high-voltage generator controller, the high-voltage distribution box controller, and the supercapacitor controller. When the coil of the power generation control relay is not energized, the normally open contacts are in the open state, the power supply lines of each controller are cut off, and they cannot obtain power and are in a non-working state.

[0033] The methods for controlling the power supply of high-voltage generator controllers, high-voltage distribution box controllers, and supercapacitor controllers using power generation control relays include:

[0034] When the power take-off and high-voltage generator controller sends a control signal to energize the coil of the generator control power supply relay, the coil generates a magnetic field, which closes the normally open contacts. At this time, the current from the low-voltage power supply provides electrical energy to the high-voltage generator controller, high-voltage distribution box controller, and supercapacitor controller through the normally open contacts.

[0035] To prevent damage to the generator control power supply controller or other equipment due to overload, short circuit, or other faults, a 10A fuse is installed in the control circuit of the generator control power supply relay. When the current in the circuit exceeds 10A, the fuse will blow, cutting off the power supply line and protecting the high-voltage generator controller, high-voltage distribution box controller, and supercapacitor controller from damage.

[0036] The power take-off solenoid valve control circuit is connected to a low-voltage power supply via a 20A fuse and a solenoid valve in sequence; the low-voltage power supply is used to power the power take-off and high-voltage generator controller and the entire system.

[0037] The input and output terminals of the two CAN lines are as follows: Figure 1 One CAN network 1 has inputs and outputs including CAN1-H and CAN1-L; the other CAN network 2 has inputs and outputs including CAN2-H and CAN2-L; its structure is as follows. Figure 2 As shown, CAN network 1 is used for the power take-off and high-voltage generator controller to communicate with the high-voltage generator, high-voltage distribution box, supercapacitor, and power take-off unit respectively, transmitting information such as bus voltage, high-voltage relay status, power take-off unit status, and cooling system temperature; CAN network 2 is used for the power take-off and high-voltage generator controller to communicate with the engine controller and instruments, including transmitting information such as engine speed, engine torque, engine speed control request, engine torque control request, power take-off status, generator control, and fault status.

[0038] The wireless controller is used to control power take-off (via power take-off switch button), power generation (via power generation switch button), parking brake (via parking brake switch button), and adjust the PTO speed (via PTO four-state switch button). The corresponding statuses are displayed via power take-off status lights, power generation status lights, and PTO mode lights. Signal reception and transmission are achieved through a radio receiving module and a radio transmitting module. The buttons include power take-off switch button, power generation switch button, parking brake switch button, and PTO four-state switch button. The corresponding lights include power take-off status lights, power generation status lights, and PTO mode lights. The hardware modules include a radio receiving module and a radio transmitting module. The remote control signal is only received when the power take-off and high-voltage power generation controllers determine that there are no occupants in the driver's or passenger's seat.

[0039] The working principle of the vehicle's power take-off and high-voltage power generation electronic control system includes:

[0040] When the user is seated in the driver's seat (seat 1) or passenger seat (seat 2), and the ambient temperature sensor detects that the ambient temperature is within the normal range of human body temperature fluctuations, the temperature sensor of seat 1 or seat 2 detects that the temperature is close to human body temperature, and the pressure sensor of seat 1 or seat 2 detects that the pressure value exceeds the preset human weight threshold, the power take-off and generator controller determines that there is someone in the driver's seat. At this time, it does not receive the remote control signal from the wireless controller; it closes the power take-off switch; and transmits the key position signal to the power take-off and generator controller through the vehicle's key status detection circuit. When the power take-off and generator controller receives that the key is in the START position (this position will power on the vehicle's starting system, connect most of the vehicle's electrical equipment, and the vehicle's electronic control unit (ECU) will perform self-checks on the vehicle's various systems), the power take-off and generator controller controls the power take-off solenoid valve relay to close, the power take-off solenoid valve is connected, and the power take-off status light illuminates at the same time;

[0041] When the PTO switch is closed and the three-state switch is set to the speed increase position, and the wheel speed sensor detects that the wheel speed is zero and the parking brake signal indicates that the parking brake is engaged, the vehicle is determined to be in a parking state. The power take-off and generator controller controls the PTO mode light to illuminate, and the engine enters PTO mode with the speed continuously increasing. When the speed reaches 1200 rpm, the three-state switch returns to the middle position, and the speed stops changing, maintaining PTO mode. When the four-state switch is rotated to the third position, the speed changes to the set speed of the third position, 1500 rpm, maintaining PTO mode.

[0042] When the generator switch is closed, and the vehicle is parked with its speed stable within the preset generator speed range (e.g., 1200-2000 rpm), where 2000 rpm is the set speed for the fourth gear, the power take-off and generator controller determines that the vehicle's status and speed meet the conditions. At this point, it closes the generator control power supply relay, and the generator status light illuminates, supplying power to the controllers of the generator system components. Based on signals such as high-voltage bus voltage and current, it outputs commands via the CAN network to control the operation of the high-voltage generator, high-voltage distribution box, and supercapacitor. Specifically, this includes: 1. The power take-off and high-voltage generator controller adjusts the generator's output power to match the load demand. For example, when the high-voltage bus voltage is detected to be low, the power take-off and generator controller sends a command to increase the high-voltage generator's output power; conversely, it reduces the output power. 2. The power take-off and generator controller controls the switching status of the high-voltage distribution box via commands, achieving on / off control of different circuits to ensure that power can be safely and rationally distributed to various electrical devices. 3. The power take-off and generator controller controls the charging and discharging process of the supercapacitor according to the needs of the generator system, playing a role in stabilizing voltage, replenishing energy, or recovering energy.

[0043] When the user leaves the driver's seat, the in-vehicle ambient temperature sensor detects that the interior temperature is gradually approaching the ambient temperature, the seat 1 temperature sensor detects a temperature drop, and the seat 1 pressure sensor detects that the pressure value is below a preset threshold. At this point, the power take-off and generator controller determines that the driver's cab is unoccupied. The wireless controller sends a signal via the radio transmitter module, and the power take-off and generator controller receives the remote control signal via the radio receiver module, performs decoding and verification, and uses the remote control to rotate the four-state switch to the fourth position. The power take-off and generator controller then increases the speed to the set speed of 2000 rpm for the fourth position, maintaining PTO mode. During operation, the power take-off and generator controller outputs fan PWM (Pulse Width Modulation) commands and water pump PWM commands to control the fan and water pump based on the cooling system temperature signal received from the CAN network. This includes: when the cooling system temperature exceeds a preset high-temperature threshold, the power take-off and high-voltage generator controller increases the PWM duty cycle of the fan and water pump, increasing the fan speed and water pump flow rate; when the cooling system temperature is below a preset low-temperature threshold, the power take-off and high-voltage generator controller decreases the PWM duty cycle of the fan and water pump, reducing the fan speed and water pump flow rate.

Claims

1. An electronic control system for vehicle power take-off and high-voltage power generation, characterized in that, include: Power take-off and high-voltage generator controller, hard-wired input terminal, hard-wired output terminal, two-channel CAN input and output terminals; The power take-off and high-voltage generator controller is connected to various sensor signals, switch signals and various relays through hardware input terminals; the power take-off and high-voltage generator controller is connected to multiple components through two CAN lines; the power take-off and high-voltage generator controller is connected to the vehicle cooling system equipment through hardware output terminals.

2. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, The power take-off and high-voltage generator controller includes an input circuit, an output circuit, an A / D converter, a microcontroller, a CAN transceiver module, a radio receiving module, and a radio transmitting module. Signals or information are transmitted to the microcontroller for processing through the input circuit, A / D converter, and radio receiver module; the processing results are then sent to the outside through the output circuit, CAN transceiver module, and radio transmitter module.

3. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, The hard-wired input terminal includes multiple input interfaces, which are connected to various vehicle sensors, including an in-vehicle ambient temperature sensor, a seat 1 temperature sensor, a seat 2 temperature sensor, a seat 1 pressure sensor, a seat 2 pressure sensor, a wheel speed signal sensor, and a key signal.

4. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1 or 3, characterized in that, The hard-wired input terminal includes multiple input interfaces, which are connected to various switches in the vehicle, including: a three-state switch, a four-state switch, a parking brake switch, a generator switch, a power take-off switch, and a PTO switch.

5. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 4, characterized in that, The three-state switch is connected to two pins of the power take-off and high-voltage generator controller; the four-state switch is connected to the other pin of the power take-off and high-voltage generator controller.

6. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, The vehicle cooling system equipment includes a fan and a water pump. The power take-off and high-voltage generator controller is connected to the fan and water pump in sequence through the water pump PWM signal output terminal and the fan PWM signal output terminal in the hardware output terminal.

7. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, The hardware output terminal is connected to the fan relay, the power take-off solenoid valve relay, and the power generation control relay.

8. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1 or 7, characterized in that, The hardware output terminal is connected to the power take-off status light, the generator status light, and the PTO mode light.

9. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, Of the two CAN input / output terminals, one CAN network 1 is connected to the high-voltage generator, high-voltage distribution box, supercapacitor, and power take-off unit respectively; the other CAN network 2 is connected to the engine controller and instruments.

10. The electronic control system for vehicle power take-off and high-voltage power generation as described in claim 1, characterized in that, It also includes a wireless controller, which is wirelessly connected to the power take-off and high-voltage generator controller.

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