CN116811525A - Energy-saving temperature control method for electric automobile cabin and whole vehicle control unit - Google Patents
Energy-saving temperature control method for electric automobile cabin and whole vehicle control unit Download PDFInfo
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- CN116811525A CN116811525A CN202310877534.1A CN202310877534A CN116811525A CN 116811525 A CN116811525 A CN 116811525A CN 202310877534 A CN202310877534 A CN 202310877534A CN 116811525 A CN116811525 A CN 116811525A
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- 238000009423 ventilation Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000005057 refrigeration Methods 0.000 claims description 18
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- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000011217 control strategy Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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- 230000017525 heat dissipation Effects 0.000 description 1
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Abstract
The invention discloses an energy-saving temperature control method for an electric automobile cabin and a whole vehicle control unit, wherein the method comprises the following steps: acquiring current state data of a vehicle and internal and external environment data of a cabin; judging whether temperature control is needed according to the current state data of the vehicle and the internal and external environment data of the cabin; and if necessary, regulating and controlling the ventilation device, the vehicle-mounted air conditioning system or the motor thermal management system. The invention can combine the internal and external environments of the cabin to carry out self-adaptive adjustment on the temperature in the cabin.
Description
Technical Field
The invention belongs to the technical field of new energy automobiles, and particularly relates to an energy-saving temperature control method for an electric automobile cabin and a whole automobile control unit.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The temperature in the vehicle cabin is an important factor influencing user experience, when weather is very hot, especially under the condition that the vehicle is parked in an outdoor parking lot, the user can ventilate through opening a door or a window before getting on the car, the cabin is cooled through an air conditioner after getting on the car, and most users usually directly open the running power of the air conditioner to the maximum because of overhigh temperature insolation in the cabin, so that the temperature is too low after a period of running, and the user can adjust the cabin again in the driving process. However, a certain time is required for raising or lowering the temperature in the cabin, and the user has a certain hysteresis for the cold and hot feeling, so that the user can repeatedly adjust the air conditioner, the process is complicated, and the repeated adjustment operation of the air conditioner in the driving process is not beneficial to driving safety.
In addition, for the electric automobile, in order to make the endurance time longer, the energy distribution is very important, and if the air conditioner is operated at a temperature exceeding the comfort range of the user or the air conditioner is repeatedly adjusted, the energy waste is definitely brought.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an energy-saving temperature control method for an electric automobile cabin and a whole vehicle control unit, which can be combined with the internal and external environments of the cabin to carry out self-adaptive adjustment on the temperature in the cabin.
To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
the new energy automobile cabin temperature control method is applied to the whole automobile control unit and is characterized by comprising the following steps of:
acquiring current state data of a vehicle and internal and external environment data of a cabin;
judging whether temperature control is needed according to the current state data of the vehicle and the internal and external environment data of the cabin; and if necessary, regulating and controlling the ventilation device, the vehicle-mounted air conditioning system or the motor thermal management system.
In some embodiments, the vehicle current state data includes a gear in which the key is located and vehicle speed data.
In some embodiments, the cabin interior exterior environment data includes cabin interior exterior temperature data, cabin exterior rainfall data, and cabin exterior air quality data.
In some embodiments, when the current gear of the vehicle key is ACC or ON, the current cabin exterior environment satisfies a windowing condition, and the cabin exterior temperature is greater than a set high temperature threshold or less than a set low temperature threshold, temperature control is deemed necessary.
In some embodiments, the cabin outer temperature is greater than a set high temperature threshold, and when the vehicle speed is zero, all the vehicle window openings are controlled to be maximum, and meanwhile, the outer circulation is started; after the duration time is set, the vehicle window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
In some embodiments, when the cabin outside temperature is greater than a set high temperature threshold, and the vehicle speed is greater than zero and less than a set maximum threshold, controlling all vehicle window openings to half, and simultaneously starting an outside cycle; after the duration time is set, the vehicle window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
In some embodiments, controlling the window to open to the set opening is specifically: and opening the vehicle window at least comprising two opposite sides to a set opening according to the current vehicle speed based on the corresponding relation between the preset vehicle speed and the opening of the vehicle window.
In some embodiments, the cabin exterior temperature is less than a set low temperature threshold, and when the vehicle speed is zero, all windows are controlled to be closed, a PTC heating request is sent to a vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system operates in a maximum heating mode, and meanwhile, the internal circulation is started; and monitoring the temperature in the cabin in real time, and controlling the vehicle-mounted air conditioning system to work in the weakest heating mode after the set time is continued when the temperature in the cabin reaches the target temperature range.
In some embodiments, the temperature outside the cabin is less than a set low temperature threshold, and when the vehicle speed is not zero, all windows are controlled to be closed, and a water pump of motor cooling water in the motor thermal management system is controlled to operate at a maximum rotation speed, so that the temperature inside the cabin is monitored in real time until the target temperature range is reached.
In some embodiments, if the cabin interior temperature does not reach the target temperature range after the duration of the set time, sending a PTC heating request to the vehicle-mounted air conditioning system, operating in the weakest heating mode, starting the inner cycle at the same time, if the cabin interior temperature does not reach the target temperature range after the duration of the set time, sending a PTC heating upgrade request to the vehicle-mounted air conditioning system until the cabin interior temperature reaches the target temperature range, and controlling the vehicle-mounted air conditioning system to operate in the weakest heating mode; and if the temperature value in the cabin exceeds the maximum value of the target temperature range for a set time, closing the PTC heating mode.
One or more embodiments of the present invention provide a vehicle control unit connected to a vehicle body controller, an on-board air conditioning system and a motor thermal management system, respectively, the vehicle body controller being connected to a ventilation device and an environment sensing device, respectively, the vehicle control unit being configured to perform the method.
The one or more of the above technical solutions have the following beneficial effects:
according to the current state data of the vehicle and the internal and external environment data of the cabin, the ventilation device, the vehicle-mounted air conditioning system or the motor thermal management system are cooperatively regulated and controlled, the self-adaptive control of the temperature in the cabin is realized on the basis of energy conservation, and the potential safety hazard that the driver influences the running due to distraction temperature regulation in the running process is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a method for energy-saving and temperature-control of an electric automobile cabin in one or more embodiments of the invention;
FIG. 2 is a diagram of an energy-efficient temperature control system architecture for an electric vehicle cabin in one or more embodiments of the invention;
fig. 3 is a schematic diagram of an energy-saving temperature control logic for an electric vehicle cabin in one or more embodiments of the invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Some embodiments of the invention disclose a new energy automobile cabin temperature control system, which comprises a whole automobile control unit (VCU), and an interaction module, a power Battery Management System (BMS), a Body Controller (BCM) and an air conditioning system which are connected with the whole automobile control unit; the vehicle body controller is connected with the ventilation device and the environment sensing device, wherein the ventilation device comprises, but is not limited to, a vehicle window and a skylight, and the environment sensing device comprises an indoor temperature sensor arranged in a seat cabin, an outdoor temperature sensor arranged outside the vehicle, a rainfall sensor, an air quality sensor, a radiator and the like. The radiator is connected with a liquid cooling system in the motor heat management and is matched with a wire harness related to the water pump power supply relay. The vehicle control system VCU is also connected with the vehicle air conditioning system ACCM and communicates through the CAN bus.
The interaction module, in this embodiment, is a central large screen ihu, and is configured to receive start-stop control of a user on the cabin temperature control method, that is, provide a soft switch for a cabin temperature automatic control mode, and receive a target temperature range input by the user, for example, 24-28 ℃. The whole vehicle control unit confirms the energy-saving temperature control starting or closing mode by collecting a mode entering request of a driver to operate the large-screen soft switch, clicks the energy-saving temperature control starting mode once, and closes the mode after clicking again.
The power battery management system is used for managing energy distribution of the whole vehicle and monitoring the current working state of the power battery, wherein the current working state comprises a battery electric quantity SOC value, a fault state, a battery connection state and the like.
And the vehicle body controller is in communication connection with the whole vehicle control unit through a CAN network.
Is configured to include:
the environment data receiving module is used for receiving the temperature in the cabin, the outdoor temperature and the rainfall data monitored by the environment sensing device and sending the temperature, the outdoor temperature and the rainfall data to the whole vehicle control unit;
the vehicle state monitoring module is used for monitoring the current state of the vehicle and sending the current state of the vehicle to the whole vehicle control unit, including but not limited to a gear where a key is located, a vehicle speed, an accessory loop state and an evaporator temperature;
and the vehicle body control module is used for responding to a cabin cooling control instruction of the whole vehicle control unit VCU and controlling the ventilation device.
The vehicle control unit has the main functions of realizing energy management of a vehicle, analyzing driving intention of a driver, managing a motor thermal management system and judging enabling of a blower. Is configured to include:
and the energy-saving temperature control mode enabling module is used for judging whether the temperature control mode can be entered according to the current vehicle state, and if yes, entering the step 2.
Specifically, a self-interaction module acquires the start-stop state of the temperature control mode; and if the vehicle is in the starting state, acquiring vehicle state information, and judging whether the current vehicle can enter the temperature control mode.
The vehicle state information includes battery state information and vehicle fault information acquired from a battery management system, and the mode can be entered when the SOC value of the battery is satisfied to be greater than 5% at the same time, there is no accessory loop interlock fault, and there is no DCDC direct current transformer fault.
The environment data monitoring module is used for acquiring the internal and external temperatures of the cabin and the external environment information acquired by the vehicle body controller, judging whether the cabin is rainy or not according to rainfall data, judging whether haze exists or not according to air quality data, and transmitting current weather information to the energy-saving temperature control module;
the energy-saving temperature control module is used for judging whether temperature control is needed according to the gear position of the key, the temperature data in the cabin or the temperature data outside the cabin, if so, acquiring the current running state data of the vehicle and the current weather information, combining the temperature difference inside and outside the cabin, generating a ventilation device regulation and control instruction, and sending the ventilation device regulation and control instruction to the vehicle body controller or initiating a regulation and control request to the vehicle-mounted air conditioning system or the motor thermal management system.
As a specific embodiment, when the current gear of the vehicle key is ACC or ON (i.e., the vehicle accessory loop is connected to high pressure), the current cabin exterior environment satisfies the windowing condition, and the cabin exterior temperature is greater than the set high temperature threshold or less than the set low temperature threshold, it is considered that temperature control is required.
In this embodiment, the weather information meeting the windowing condition mainly means that the vehicle does not rain and the air quality is good, and the vehicle speed is within a set maximum threshold. As an example, the cabin exterior temperature is set to a high temperature threshold of 30 ℃, a low temperature threshold of 10 ℃, and a maximum threshold of 80km/h.
The specific control strategy is as follows:
(1) The temperature outside the cabin is greater than a set high temperature threshold, and the vehicle speed is zero.
This situation often occurs in high temperature weather, when the user has just gone up, the cabin interior temperature is very high, even greater than 40 degrees celsius. The control strategy is as follows: controlling the opening of all windows (including the windows on the side of the vehicle and a skylight) to be maximum, and simultaneously opening external circulation, in particular an external circulation strong wind mode; after the duration is set (6 minutes in the embodiment), the window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
(2) The cabin exterior temperature is greater than the set high temperature threshold and the vehicle speed is not within the set maximum threshold.
The control strategy is as follows: controlling the window to be opened to a set opening degree, and simultaneously opening the external circulation; after the duration is set (6 minutes in the embodiment), the window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
The control of opening the vehicle window to the set opening is specifically as follows: and opening the vehicle window at least comprising two opposite sides to a set opening according to the current vehicle speed based on the corresponding relation between the preset vehicle speed and the opening of the vehicle window. The corresponding relation between the preset vehicle speed and the opening of the vehicle window is shown in table 1.
Table 1 preset correspondence between vehicle speed and window opening
Different vehicle windows are opened and different openings are opened according to different vehicle speeds, so that the air flow rule in the vehicle at different vehicle speeds is considered, the ventilation effect is improved, and the comfort level of passengers is ensured.
In addition, in order to improve the heat dissipation effect, the control strategies (1) and (2) are also used for controlling the radiator and the blower, and the smaller the temperature difference between the inside and outside of the cabin is, the smaller the rotating speed of the radiator water pump is, and the larger the wind speed of the blower is. Specifically, when the temperature difference between the inside and the outside of the cabin is smaller, the rotating speed of the water pump is 2500rpm, and the low-speed fan is started; the temperature difference between the cabin interior and the cabin exterior is large, the rotating speed of the water pump is 4500rpm, and the high-speed fan is started.
(3) The temperature outside the cabin is smaller than the set low temperature threshold, and the vehicle speed is zero.
The control strategy is as follows: controlling all vehicle windows to be closed, sending a PTC heating request to a vehicle-mounted air conditioning system, operating in a maximum heating mode, and simultaneously starting internal circulation; and monitoring the temperature in the cabin in real time, and controlling the vehicle-mounted air conditioning system to work in the weakest heating mode after the temperature in the cabin reaches the target temperature range and the set time is continued (10 minutes in the embodiment).
(4) The temperature outside the cabin is smaller than the set low temperature threshold, and the vehicle speed is not zero.
The control strategy is as follows: the temperature outside the cabin is smaller than a set low temperature threshold value, and the vehicle speed is not zero, all vehicle windows are controlled to be closed, and a water pump of motor cooling water in a motor thermal management system is controlled to operate at the maximum rotation speed, so that the temperature inside the cabin is monitored in real time; after the duration of the set time (10 minutes in the embodiment), if the temperature in the cabin does not reach the target temperature range, sending a PTC heating request to the vehicle-mounted air conditioning system, operating in the weakest heating mode, starting the inner circulation at the same time, and if the temperature in the cabin does not reach the target temperature range, sending a PTC heating upgrading request to the vehicle-mounted air conditioning system until reaching the target temperature range, and controlling the vehicle-mounted air conditioning system to operate in the weakest heating mode; if the temperature value in the cabin exceeds the maximum value set time (3 minutes in the embodiment) of the target temperature range, the PTC heating mode is closed, and after the PTC heating mode is closed for the set time, if the temperature in the cabin still exceeds the maximum value of the target range, the rotating speed of a water pump in the motor thermal management system is reduced.
One or more embodiments of the present invention further provide a new energy automobile cabin temperature control method, which is applied to a whole vehicle control unit, and includes the following steps:
step 1: acquiring current state data of a vehicle and internal and external environment data of a cabin;
step 2: judging whether temperature control is needed according to the current state data of the vehicle and the internal and external environment data of the cabin; and if necessary, regulating and controlling the ventilation device, the vehicle-mounted air conditioning system or the motor thermal management system.
For a specific implementation of the above steps, see the relevant description above.
One or more embodiments of the present invention also provide a vehicle control unit connected to a vehicle body controller, a vehicle-mounted air conditioning system, and a motor thermal management system, respectively, the vehicle body controller being connected to a ventilation device and an environment sensing device, respectively, the vehicle control unit being configured to perform the above-described method.
In one or more embodiments, data is collected through the temperature sensor inside and outside the vehicle, a temperature demand range is preset according to the I HU central control large screen, and the vehicle body controller, the battery management system, the air conditioning system, the thermal management system and the blower are cooperatively controlled through the whole vehicle controller, so that the vehicle can better meet the energy-saving temperature control requirements and reduce the operation of a driver on temperature regulation. After the mode is started, the target temperature is input into the central control large screen, the temperature value of the vehicle cabin is automatically adjusted to the target range in the most energy-saving mode, repeated operation of a driver is reduced, and potential safety hazards that the driver affects running due to distraction temperature adjustment in the running process are avoided.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (11)
1. The new energy automobile cabin temperature control method is applied to the whole automobile control unit and is characterized by comprising the following steps of:
acquiring current state data of a vehicle and internal and external environment data of a cabin;
judging whether temperature control is needed according to the current state data of the vehicle and the internal and external environment data of the cabin; and if necessary, regulating and controlling the ventilation device, the vehicle-mounted air conditioning system or the motor thermal management system.
2. The new energy automobile cabin temperature control method according to claim 1, wherein the current state data of the automobile comprises a gear position where a key is located and automobile speed data.
3. The new energy automobile cabin temperature control method according to claim 1, wherein the cabin interior and exterior environment data includes cabin interior and exterior temperature data, cabin exterior rainfall data, and cabin exterior air quality data.
4. The new energy automobile cabin temperature control method according to claim 1, wherein when the current gear of the vehicle key is ACC or ON, the current cabin exterior environment satisfies a windowing condition, and the cabin exterior temperature is greater than a set high temperature threshold or less than a set low temperature threshold, temperature control is considered to be required.
5. The new energy automobile cabin temperature control method according to claim 1, wherein the cabin outside temperature is greater than a set high temperature threshold, and the vehicle speed is zero, all the windows are controlled to be maximum, and the outside circulation is started; after the duration time is set, the vehicle window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
6. The new energy automobile cabin temperature control method according to claim 1, wherein when the cabin outside temperature is greater than a set high temperature threshold, and the vehicle speed is greater than zero and less than a set maximum threshold, controlling all windows to half opening, and simultaneously starting an outer cycle; after the duration time is set, the vehicle window is controlled to be closed, a refrigeration request is sent to the vehicle-mounted air conditioning system, the vehicle-mounted air conditioning system is controlled to work in a maximum refrigeration mode, meanwhile, the temperature in the cabin is monitored in real time, and when the temperature in the cabin reaches a target temperature range, the vehicle-mounted air conditioning system is controlled to work in a weakest refrigeration mode.
7. The method for controlling cabin temperature of a new energy automobile according to claim 6, wherein the opening of the window to the set opening degree is specifically: and opening the vehicle window at least comprising two opposite sides to a set opening according to the current vehicle speed based on the corresponding relation between the preset vehicle speed and the opening of the vehicle window.
8. The new energy automobile cabin temperature control method according to claim 1, wherein the cabin exterior temperature is less than a set low temperature threshold, and when the vehicle speed is zero, all windows are controlled to be closed, a PTC heating request is sent to an on-board air conditioning system, the vehicle is operated in a maximum heating mode, and meanwhile, an internal circulation is started; and monitoring the temperature in the cabin in real time, and controlling the vehicle-mounted air conditioning system to work in the weakest heating mode after the set time is continued when the temperature in the cabin reaches the target temperature range.
9. The method for controlling cabin temperature of a new energy automobile according to claim 1, wherein the temperature outside the cabin is less than a set low temperature threshold, and the vehicle speed is not zero, all windows are controlled to be closed, and a water pump of motor cooling water in a motor thermal management system is controlled to operate at a maximum rotation speed, so that the temperature inside the cabin is monitored in real time until a target temperature range is reached.
10. The method for controlling cabin temperature of a new energy automobile according to claim 9, wherein if the cabin interior temperature does not reach the target temperature range after the duration of the setting time, a PTC heating request is sent to an on-board air conditioning system, the system is operated in a weakest heating mode, and meanwhile, an inner loop is started, if the cabin interior temperature does not reach the target temperature range after the duration of the setting time, a PTC heating upgrade request is sent to the on-board air conditioning system until the target temperature range is reached, and the on-board air conditioning system is controlled to operate in the weakest heating mode; and if the temperature value in the cabin exceeds the maximum value of the target temperature range for a set time, closing the PTC heating mode.
11. A vehicle control unit connected to a vehicle body controller, an on-board air conditioning system and a motor thermal management system, respectively, wherein the vehicle body controller is connected to a ventilation device and an environment awareness device, respectively, the vehicle control unit being configured to perform the method of any of claims 1-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310877534.1A CN116811525A (en) | 2023-07-17 | 2023-07-17 | Energy-saving temperature control method for electric automobile cabin and whole vehicle control unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310877534.1A CN116811525A (en) | 2023-07-17 | 2023-07-17 | Energy-saving temperature control method for electric automobile cabin and whole vehicle control unit |
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| CN202310877534.1A Pending CN116811525A (en) | 2023-07-17 | 2023-07-17 | Energy-saving temperature control method for electric automobile cabin and whole vehicle control unit |
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