Control method for driving air conditioner compressor through brake inflation pump of new energy electric vehicle

Abstract

The invention discloses a control method for driving an air conditioner compressor through a brake inflation pump of a new energy electric vehicle, and relates to the technical field of vehicle control. When the air pressure value is higher than a threshold value, starting a non-braking inflation working condition: enabling an all-in-one controller to drive an air pump motor, controlling an electromagnetic clutch to disengage an air pump piston from the motor, closing a compressor electromagnetic clutch, and driving a mechanical air conditioner compressor to operate through a belt; and when the air pressure value is lower than the threshold value, starting a braking inflation working condition: enabling the all-in-one controller to drive an air pump motor, coupling an air pump piston to execute an inflation task, and forbidding air conditioner request signal transmission. A high-value electric compressor is replaced by a low-cost mechanical part, so that the overheating risk of electronic components is thoroughly avoided, and meanwhile, the complexity of the system is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a control method for driving an air conditioner compressor of a new energy electric vehicle by a brake air pump. BACKGROUND

[0002] The current new energy vehicle air conditioning system has two defects: first, the IGBT module, a core component of the electric compressor, has a temperature rise exceeding the standard under the condition of continuous high-frequency start-stop, and the failure rate is as high as 15% in summer; second, the cost of the electric compressor accounts for more than 20% of the total vehicle accessory cost, and requires independent high-voltage wiring and control interface. The existing improvement schemes such as adding a heat dissipation device or optimizing the control algorithm can only delay the occurrence of failure and cannot fundamentally solve the design defects.

[0003] The independent operation of the electric compressor and the brake air pump leads to resource waste; the scattered layout of high-voltage accessories increases the cost of wiring; and there is a lack of a fundamental solution to the overheating problem of electronic components. Therefore, an innovative architecture is urgently needed that can simultaneously solve the problems of cost, reliability, and system integration. SUMMARY

[0004] The present application provides a control method for driving an air conditioner compressor of a new energy electric vehicle by a brake air pump, to at least solve one technical problem in the related art.

[0005] According to one aspect of the present application, a control method for driving an air conditioner compressor of a new energy electric vehicle by a brake air pump is provided, comprising: receiving an air conditioning start request signal and air pressure sensor data; when the air pressure value is higher than a threshold value, starting a non-brake air pumping condition: enabling a multi-in-one controller to drive the air pump motor, controlling the electromagnetic clutch to separate the air pump piston from the motor, simultaneously closing the compressor electromagnetic clutch, and driving the mechanical air conditioner compressor to operate through the belt; when the air pressure value is lower than the threshold value, starting a brake air pumping condition: enabling the multi-in-one controller to drive the air pump motor, coupling the air pump piston to perform the air pumping task, and prohibiting the transmission of the air conditioning request signal.

[0006] As an optional implementation, the non-brake air pumping condition specifically includes: the air conditioning panel sends an AC request to the VCU after detecting that the high and low pressures are normal; the VCU sends an air pump high-voltage enable signal to the multi-in-one controller; the air conditioning panel controls the air pump piston electromagnetic clutch to separate, and closes the compressor electromagnetic clutch; and the multi-in-one controller dynamically adjusts the air pump motor speed.

[0007] As an optional implementation, the brake air pumping condition specifically includes: the combination instrument sends a low pressure message to the vehicle CAN bus when the air path pressure detected by the air pressure sensor is lower than 6.2kpa; the VCU receives the message and sends an air pump enable signal to the multi-in-one controller; the air pump piston crank connecting rod mechanism remains in a coupled state to perform air pumping; and the air conditioning panel locks the transmission of the AC request signal.

[0008] As an optional implementation, the air pressure threshold is set to 6.2kpa, and the air conditioning request and the braking request are signal mutually exclusive controlled by the VCU.

[0009] As an optional implementation, the all-in-one controller performs DC / AC conversion to convert high-voltage direct current into three-phase alternating current to drive the air pump motor.

[0010] According to another aspect of the present application, a control system for driving an air conditioner compressor by a brake air pump of a new energy electric vehicle is provided, characterized in that the control method for driving an air conditioner compressor by a brake air pump of a new energy electric vehicle is implemented, comprising: a brake air pump motor connected to a piston crank connecting rod mechanism of the air pump; a mechanical air conditioner compressor connected to the air pump motor output shaft through a belt; a double electromagnetic clutch system including a piston separation clutch of the air pump and a clutch of the compressor; a vehicle control unit processing air conditioning requests and air pressure signals and outputting control instructions; and an all-in-one controller driving the air pump motor in response to the VCU instructions.

[0011] As an optional implementation, the air pump piston electromagnetic clutch separates the piston and the motor shaft in the non-braking condition to allow the motor to run at no load, and couples the piston and the motor shaft to transmit torque in the braking condition.

[0012] As an optional implementation, the compressor electromagnetic clutch is closed to transmit the belt driving force in the non-braking condition, and is disconnected in the braking condition.

[0013] As an optional implementation, power is supplied through the high-voltage interface of the air pump motor.

[0014] According to another aspect of the present application, a new energy electric vehicle is provided, which is equipped with the control system for driving an air conditioner compressor by a brake air pump of a new energy electric vehicle and implements the control method for driving an air conditioner compressor by a brake air pump of a new energy electric vehicle.

[0015] In the embodiment of the present application, a control method for driving an air conditioner compressor by a new energy electric vehicle brake air pump is provided, comprising: receiving an air conditioner opening request signal and air pressure sensor data; when the air pressure value is higher than a threshold value, starting a non-brake air pumping working condition: enabling a multi-in-one controller to drive a pump motor, controlling an electromagnetic clutch to disconnect the pump piston from the motor, and simultaneously closing the compressor electromagnetic clutch to drive the mechanical air conditioner compressor to operate through a belt; when the air pressure value is lower than the threshold value, starting a brake air pumping working condition: enabling the multi-in-one controller to drive the pump motor, coupling the pump piston to perform the air pumping task, and disabling the air conditioner request signal transmission. The method dynamically switches the working mode by intelligently sensing the air pressure state: when the air pressure is sufficient, the air pumping motor is reused to drive the air conditioner compressor, and when the air pressure is insufficient, the brake function is prioritized and the air conditioner request is disabled. The core value lies in breaking the limitations of traditional system function isolation and creatively realizing the dual function reuse of key components. The air pressure threshold determination mechanism ensures the absolute priority of the brake system, and the mode switching process does not require manual intervention, which not only ensures driving safety but also expands the utilization rate of the equipment. By replacing the high-value electric compressor with a low-cost mechanical component, the risk of overheating of electronic components is completely avoided, and the system complexity is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0018] Figure 1 FIG. 1 is a flowchart of a control method for driving an air conditioner compressor by a new energy electric vehicle brake air pump according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort should be within the scope of protection of the present application.

[0020] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application and the above-described accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units as processes, methods, systems, products or apparatuses are not necessarily limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or apparatuses.

[0021] As Figure 1 shown, the embodiments of the present application provide a control method for driving an air conditioner compressor by a new energy electric vehicle brake air pump, comprising:

[0022] S1 receives an air conditioner opening request signal and air pressure sensor data;

[0023] S2, when the air pressure value is higher than the threshold value, start the non-braking air pumping condition: enable the multi-in-one controller to drive the air pump motor, control the electromagnetic clutch to separate the air pump piston from the motor, and at the same time close the compressor electromagnetic clutch to drive the mechanical air conditioner compressor to run through the belt;

[0024] S3, when the air pressure value is lower than the threshold value, start the braking air pumping condition: enable the multi-in-one controller to drive the air pump motor, couple the air pump piston to perform the air pumping task, and prohibit the air conditioner request signal transmission.

[0025] The method dynamically switches the working mode by intelligently sensing the air pressure state: when the air pressure is sufficient, the air pumping pump motor is reused to drive the air conditioner compressor, and when the air pressure is insufficient, the braking function is prioritized and the air conditioner request is disabled. The core value lies in breaking the limitations of traditional system function isolation and creatively realizing the dual function reuse of key components. The air pressure threshold determination mechanism ensures the absolute priority of the braking system, and the mode switching process does not require manual intervention, which not only ensures driving safety but also expands equipment utilization. By replacing the high-value electric compressor with low-cost mechanical components, the risk of overheating of electronic components is completely avoided, and the system complexity is significantly reduced.

[0026] As an optional embodiment, the non-braking air pumping condition specifically includes: the air conditioner panel sends an AC request to the VCU after detecting normal high and low pressure; the VCU sends an air pump high pressure enable signal to the multi-in-one controller; the air conditioner panel controls the air pump piston electromagnetic clutch to separate, and closes the compressor electromagnetic clutch; the multi-in-one controller dynamically adjusts the air pump motor speed.

[0027] The fine control process of the non-braking working condition includes multiple signal verification and execution coordination: the air conditioner panel pre-checks the refrigeration system to ensure the operating state, the vehicle controller activates the motor drive module, and the step-by-step operation of the double electromagnetic clutch realizes seamless switching of the power path. This design establishes multiple safety mechanisms, pressure detection to prevent abnormal working conditions of refrigerants, clutch timing control to eliminate mechanical impact, and dynamic speed adjustment to match actual refrigeration needs. The entire process maximizes mechanical energy transmission efficiency, converting traditional idle brake system components into air conditioning power sources.

[0028] As an optional implementation, the brake inflation working condition specifically includes: the combination instrument sends a low pressure message to the vehicle CAN bus when the air path pressure is detected by the air pressure sensor to be lower than 6.2kpa; the VCU sends an air pump enable signal to the multi-in-one controller after receiving the message; the air pump piston crank connecting rod mechanism remains in a coupled state to perform inflation; and the air conditioner panel locks the AC request signal transmission.

[0029] The emergency response mechanism of the braking working condition is triggered by a distributed sensing network: the air pressure sensor monitors key safety parameters in real time, bus communication realizes millisecond-level alarm propagation, and the control unit executes signal mutual exclusion locking. This scheme reconfigures the system priority logic, considers maintaining brake air pressure as a non-interruptible core task, and the intelligent retreat of air conditioning function avoids the dispersion of power resources. The continuous coupling state of the air pump piston ensures the complete transmission of braking torque, preventing brake failure accidents caused by insufficient air pressure from the root.

[0030] As an optional implementation, the air pressure threshold is set to 6.2kpa, and the signal mutual exclusion control of air conditioning request and brake request is realized through VCU.

[0031] Scientific setting of air pressure threshold balances dual needs: the critical value is higher than the lower limit of brake safety to leave a buffer margin, and lower than the maximum pressure value of the system to avoid frequent switching. The mutual exclusion control logic is realized through dual channels of hardware signal isolation and software flag, ensuring the absolute reliability of working condition switching. This design forms an adaptive decision center, autonomously allocates device resources in complex driving environments, and optimally coordinates safety needs and comfort needs.

[0032] As an optional implementation, the multi-in-one controller performs DC / AC conversion to convert high-voltage direct current into three-phase alternating current to drive the air pump motor.

[0033] The energy conversion function of the multi-in-one controller breaks through the traditional accessory drive mode: converting high-voltage direct current into three-phase alternating current drive, enabling the inflation pump motor to have stepless speed regulation capability. The intelligent modulation technology used in the power conversion process meets the variable working condition operation needs of the compressor and ensures controllable motor winding temperature rise. This scheme cancels the dedicated air conditioner drive module and greatly reduces system redundancy through power electronic device reuse.

[0034] According to another aspect of the present application, a control system for driving an air conditioner compressor by a brake air pump of a new energy electric vehicle is provided, characterized in that the control method for driving the air conditioner compressor by the brake air pump of the new energy electric vehicle is implemented, comprising: a brake air pump motor connected to a piston crank connecting rod mechanism; a mechanical air conditioner compressor connected to the air pump motor output shaft through a belt; a double electromagnetic clutch system including a piston separation clutch and a compressor coupling clutch; a vehicle control unit processing air conditioning requests and air pressure signals and outputting control instructions; and a multi-in-one controller driving the air pump motor in response to the VCU instructions.

[0035] The control system hardware architecture realizes cross-system integration innovation: the air pump motor serves as a core power source for bidirectional output, the mechanical compressor obtains efficient driving force through belt transmission, and the double clutch system constructs mechanical logical interlocking. This physical layout breaks through the traditional assembly boundary, and the brake system and the air conditioning system share the power unit, reducing the number of rotating parts. The vehicle control unit serves as an intelligent center to analyze multiple signals, and the multi-in-one controller executes accurate energy distribution, forming a new type of thermal management platform with deep mechanical and electrical collaboration.

[0036] As an optional implementation, the air pump piston electromagnetic clutch separates the piston and the motor shaft in the non-braking condition to enable the motor to run under no load, and couples the piston and the motor shaft to transmit torque in the braking condition.

[0037] The innovative design of the air pump piston clutch realizes dynamic coupling of the load: in the separated state, the crank connecting rod resistance is removed to enable the motor to run under no load, and in the coupled state, a rigid connection is established to transmit the braking torque. The mechanical structure adopts an electromagnetic slip ring and a spring pressing sheet composite device, which automatically resets when powered off to ensure brake priority. This component creatively solves the core contradiction in functional multiplexing, enabling a single motor to serve comfort and safety needs at different times.

[0038] As an optional implementation, the compressor electromagnetic clutch is closed to transmit the belt driving force in the non-braking condition, and is disconnected in the braking condition.

[0039] The always-on characteristic of the compressor clutch establishes a safety isolation barrier: when coupled, the electromagnetic force overcomes the spring pre-tightening force to transmit torque, and when disconnected, the rotating parts are completely isolated. This design forms a functional exclusion at the physical level, automatically cutting off the refrigeration load when the brake system is activated to prevent power overload risk. Special friction materials and heat dissipation structures ensure durability in high-frequency coupling conditions, with mode switching life exceeding 100,000 times.

[0040] As an optional implementation, power is supplied uniformly through the high-voltage interface of the air pump motor.

[0041] The simplified reconstruction of the wire harness architecture realizes essential cost reduction: canceling the dedicated high-voltage wire harness eliminates the insulation protection cost, and the multi-in-one controller interface integration reduces the number of connectors. This optimization not only reduces material consumption, but also reduces high-voltage connector failure points and improves system electromagnetic compatibility performance. The intensive design of the power distribution system shortens the vehicle wire harness path and significantly reduces the installation process complexity.

[0042] According to another aspect of the present application, a new energy electric vehicle is provided, which is equipped with the control system for driving the air conditioner compressor by the brake air pump of the new energy electric vehicle and executes the control method for driving the air conditioner compressor by the brake air pump of the new energy electric vehicle.

[0043] Those skilled in the art can understand that the device for implementing the above-mentioned control method for driving the air conditioner compressor by the brake air pump of the new energy electric vehicle can be a terminal device, which can be a smart phone (such as an Android phone, an IOS phone, etc.), a tablet computer, a palm computer, a mobile internet device (MID), a PAD, etc. The present application does not limit the structure of the above-mentioned electronic device.

[0044] Those skilled in the art can understand that all or part of the steps in the above-mentioned various methods of the embodiments can be completed by instructing the hardware related to the terminal device by a program, which can be stored in a computer readable storage medium, which can include a flash disk, a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0045] The above-mentioned serial numbers of the embodiments of the present application are only for description, not representing the advantages and disadvantages of the embodiments.

[0046] The integrated units in the above-mentioned embodiments, if realized in the form of software function units and sold or used as independent products, can be stored in the above-mentioned computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of software products, which are stored in the storage medium and include a plurality of instructions for making one or more electronic devices (which can be personal computers, servers or network devices, etc.) execute all or part of the steps of the methods described in the embodiments of the present application.

[0047] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0048] In several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other manners. Of course, the described apparatus embodiments are merely schematic, for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or the among different units, can be indirect couplings or communication connections through some interfaces, units or modules, and can be in electrical or other forms.

[0049] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on a plurality of network units. In actual implementation, some or all of the units can be selected according to actual needs to achieve the purposes of the solutions provided in the embodiments.

[0050] In addition, each functional unit in the embodiments of the present application can be integrated in a processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0051] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0052] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A control method for driving an air conditioning compressor using a brake air pump in a new energy electric vehicle, characterized in that, include: Receives air conditioner activation request signals and air pressure sensor data; When the air pressure value is higher than the threshold, the non-braking air pumping mode is started: the all-in-one controller is enabled to drive the air pump motor, control the electromagnetic clutch to disengage the air pump piston from the motor, and at the same time close the compressor electromagnetic clutch, driving the mechanical air conditioning compressor to run through the belt. When the air pressure value is lower than the threshold, the braking and air-inflating mode is activated: the all-in-one controller is enabled to drive the air pump motor, coupled to the air pump piston to perform the air-inflating task, and the transmission of the air conditioner request signal is prohibited.

2. The control method for driving the air conditioning compressor with the brake pump of a new energy electric vehicle as described in claim 1, characterized in that, The non-braking inflation condition specifically includes: After the air conditioning panel detects that the high and low pressures are normal, it sends an AC request to the VCU. The VCU sends a high-pressure air pump enable signal to the all-in-one controller; The air conditioning panel controls the disengagement of the air pump piston electromagnetic clutch and the engagement of the compressor electromagnetic clutch; The all-in-one controller dynamically adjusts the speed of the air pump motor.

3. The control method for driving the air conditioning compressor with the brake pump of a new energy electric vehicle as described in claim 1, characterized in that, The specific braking and air-inflating conditions include: When the instrument cluster detects that the air pressure in the air circuit is lower than 6.2 kPa using a pressure sensor, it sends a low-pressure message to the vehicle's CAN bus. After receiving the message, the VCU sends an air pump enable signal to the all-in-one controller. The air pump piston-crank-connecting rod mechanism remains coupled to perform air pumping; The air conditioner panel is locked to request AC signal transmission.

4. The control method for driving the air conditioning compressor with the brake pump of a new energy electric vehicle as described in claim 1, characterized in that, The air pressure threshold is set to 6.2 kPa, and the VCU enables mutual exclusion control of air conditioning requests and braking requests.

5. The control method for driving the air conditioning compressor with the brake pump of a new energy electric vehicle as described in claim 1, characterized in that, The all-in-one controller performs DC / AC conversion, converting high-voltage direct current into three-phase alternating current to drive the air pump motor.

6. A control system for a brake air pump driving an air conditioning compressor in a new energy electric vehicle, characterized in that, The control method for driving the air conditioning compressor with the brake air pump of a new energy electric vehicle as described in any one of claims 1-5 includes: Brake air pump motor, connected to air pump piston crank connecting rod mechanism; The mechanical air conditioning compressor is connected to the output shaft of the air pump motor via a belt; The dual electromagnetic clutch system includes a pump piston separation clutch and a compressor engagement clutch; The vehicle controller processes air conditioning requests and air pressure signals and outputs control commands. An all-in-one controller that responds to VCU commands to drive the air pump motor.

7. The control system for driving the air conditioning compressor with a brake pump in a new energy electric vehicle as described in claim 6, characterized in that, The air pump piston electromagnetic clutch separates the piston from the motor shaft under non-braking conditions, allowing the motor to run unloaded; under braking conditions, it couples the piston to the motor shaft to transmit torque.

8. The control system for driving the air conditioning compressor with a brake pump in a new energy electric vehicle as described in claim 6, characterized in that, The compressor's electromagnetic clutch closes to transmit belt drive force when not braking and disengages when braking.

9. The control system for driving the air conditioning compressor with a brake pump in a new energy electric vehicle as described in claim 6, characterized in that, Power is supplied uniformly through the high-voltage interface of the air pump motor.

10. A new energy electric vehicle, characterized in that, The system is equipped with a control system for driving an air conditioning compressor using a brake air pump in a new energy electric vehicle as described in any one of claims 6-9, and executes a control method for driving an air conditioning compressor using a brake air pump in a new energy electric vehicle as described in any one of claims 1-5.

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