CN113928075A - ECAS integrated actuator and air suspension system - Google Patents
ECAS integrated actuator and air suspension system Download PDFInfo
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- CN113928075A CN113928075A CN202111458672.3A CN202111458672A CN113928075A CN 113928075 A CN113928075 A CN 113928075A CN 202111458672 A CN202111458672 A CN 202111458672A CN 113928075 A CN113928075 A CN 113928075A
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- 238000005259 measurement Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000036039 immunity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0528—Pressure regulating or air filling valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
- B60G2400/252—Stroke; Height; Displacement vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/51—Pressure in suspension unit
- B60G2400/512—Pressure in suspension unit in spring
- B60G2400/5122—Fluid spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/70—Temperature of vehicle part or in the vehicle
- B60G2400/71—Temperature of vehicle part or in the vehicle of suspension unit
- B60G2400/712—Temperature of vehicle part or in the vehicle of suspension unit of spring
- B60G2400/7122—Fluid spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/204—Pressure regulating valves for air-springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
- B60G2500/302—Height or ground clearance using distributor valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to an ECAS integrated actuator and an air suspension system, which solve the technical problem of complex wire harness connection of the existing air suspension system. The ECAS integrated type actuator comprises a detection unit, an electromagnetic valve group and a control module, wherein the detection unit is used for detecting the working state of the air spring, a detection signal is transmitted to the control module, the control module controls the on-off of the electromagnetic valve group according to the detection signal so as to adjust the supporting height of the air spring, the control module comprises a first power line transceiving unit, the first power line transceiving unit is communicated with the outside and transmits electric energy, the detection unit, the electromagnetic valve group and the control module form an actuator unit, and the actuator unit can be integrally disassembled and assembled. According to the invention, by integrally arranging all parts in the air suspension system, the wiring harness connection is simplified, the installation in a vehicle is convenient, the interference of an electromagnetic environment can be effectively avoided, and the stability of the system is improved.
Description
Technical Field
The invention belongs to the technical field of automobile accessories, and particularly relates to an ECAS integrated actuator and an air suspension system.
Background
An Air Suspension system (ECAS) provided on an automobile can maintain a constant ride height of the vehicle and also achieve a reduction in height in a particular direction, such as a forward, backward, side kneeling mode. At present, most of topological structures of air suspension systems are, as shown in fig. 1, conventional controller ECUs are connected with all parts through wiring harnesses, including electromagnetic valves, height sensors, pressure sensors and the like, and the topological structures have the following defects:
under the topological structure, the wiring harness is complex in connection and multiple in connection points and connectors, so that the operation is complex when the whole vehicle is arranged and installed, and the wiring harness is easy to have problems in the later maintenance process, so that the ECAS system works abnormally;
under the topological structure, because all parts are dispersedly and respectively installed and arranged, the operation steps are more when the whole vehicle is arranged and installed, and the installation procedure time is long;
under this topological structure, because the signal of each sensor is in transmitting to controller ECU via the pencil, gather and the analysis, but new energy vehicle is more and more at present, and whole car electromagnetic environment is complicated, and the sensor signal under this type topological structure is in the in-process of carrying out the transmission through long pencil, and the electromagnetic environment of being relatively easily by whole car disturbs, leads to system work unusual.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide an ECAS integrated actuator and an air suspension system, which integrate all parts, simplify the connection of wire harnesses, facilitate the installation in a vehicle, effectively avoid the interference of electromagnetic environment and improve the stability of the system.
The invention provides an ECAS integrated actuator, which comprises a detection unit, an electromagnetic valve group and a control module, wherein the detection unit is used for detecting the working state of an air spring, a detection signal is transmitted to the control module, the control module controls the on-off of the electromagnetic valve group according to the detection signal so as to adjust the supporting height of the air spring, the control module comprises a first power line transceiving unit, the first power line transceiving unit is used for communicating with the outside and transmitting electric energy, the detection unit, the electromagnetic valve group and the control module form an actuator unit, and the actuator unit can be integrally assembled and disassembled.
Optionally, the detection unit includes a pressure sensor for detecting an internal air pressure of the air spring and a height sensor for detecting a support height of the air spring.
Optionally, the detection unit further comprises a temperature sensor for detecting the internal temperature of the air spring.
Optionally, the first power line transceiving unit employs a DCAN500 module.
Optionally, the temperature sensor is an NTC temperature sensor.
Optionally, the control module further comprises an MCU, a first acquisition module, a second acquisition module, a solenoid valve control module, a distance measurement control module, an internal CAN communication module, and a power module;
the first acquisition module is respectively electrically connected with the pressure sensor and the MCU and is used for acquiring a detection signal of the pressure sensor and transmitting the detection signal to the MCU;
the second acquisition module is respectively electrically connected with the temperature sensor and the MCU and is used for acquiring a detection signal of the temperature sensor and transmitting the detection signal to the MCU;
the electromagnetic valve control module is respectively electrically connected with the electromagnetic valve group and the MCU and is used for controlling the electromagnetic valve group to regulate the air pressure of the air spring, detecting the working state of the electromagnetic valve group and sending a detection signal to the MCU;
the distance measurement control module is respectively electrically connected with the height sensor and the MCU and is used for controlling the height sensor to detect the support height of the air spring and sending a detection signal of the height sensor to the MCU;
the inner CAN communication module is electrically connected with the MCU and is used for communicating with external detection equipment;
the first power line transceiving unit is electrically connected with the external main control unit, the power supply module and the MCU respectively;
the power module is electrically connected with the first power line transceiving unit and the MCU respectively, and is used for adjusting electric energy input from the outside and supplying power to the ECAS integrated actuator.
Optionally, the MCU, the first power line transceiver unit, the first acquisition module, the second acquisition module, the solenoid valve control module, the distance measurement control module, the inner CAN communication module, and the power module are integrated on the same circuit board.
Optionally, the height sensor is disposed at a first end of the air spring, the height sensor includes an image collecting device and a light emitting device, the light emitting device irradiates light to a second end of the air spring to form an image spot, the image collecting device collects the image spot, and the support height of the air spring is detected according to a brightness change of the image spot.
In another aspect, the present invention provides an air suspension system, which includes a plurality of air springs, and further includes the ECAS integrated actuators described above, each of the ECAS integrated actuators controlling one of the air springs, and the ECAS integrated actuators being disposed on an upper cover or a lower cover of the air spring.
Optionally, the ECAS integrated actuator is provided with a pressure sensor, a height sensor and a temperature sensor, the height sensor and the temperature sensor are arranged inside the air spring, and the pressure sensor is arranged inside the air spring or on the air path.
Optionally, the controller further comprises a master control unit, the master control unit is provided with a second power line transceiver unit, the second power line transceiver unit is electrically connected to the first power line transceiver unit of the ECAS integrated actuator, and the master control unit and the ECAS integrated actuator communicate and transmit electric energy with the first power line transceiver unit through the second power line transceiver unit.
Optionally, the main control unit is connected with a whole vehicle system through a CAN bus and is used for performing data communication between the whole vehicle system and the air suspension system;
optionally, the main control unit is connected with a power supply unit of the whole vehicle system through a power line, and electric energy is obtained from the power supply unit of the whole vehicle system.
According to the technical scheme, the ECAS integrated actuator and the air suspension system provided by the invention have the following advantages:
the invention greatly simplifies the topological relation of system connection, simplifies the connection wiring harness of the system, reduces the connectors of the system, realizes the communication and power supply of all actuators and information centers only by a ring bus consisting of two wires, carries out the arrangement and installation of the whole vehicle under the scheme, only needs to consider the installation of the actuators on the air springs, greatly simplifies the arrangement and installation procedures, has flexible configuration, reduces the operation procedure duration of the system when the whole vehicle is arranged and installed, improves the immunity of the system to the electromagnetic environment, and improves the stability of the system.
Drawings
FIG. 1 is a schematic diagram of a prior art air suspension system;
FIG. 2 is a schematic diagram of the ECAS integrated actuator of the present invention;
FIG. 3 is a schematic structural diagram of an ECAS integrated actuator according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an air suspension system in an embodiment of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, an ECAS integrated actuator and air suspension system of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 2 and 3, embodiment 1 of the present invention discloses an ECAS integrated actuator, which includes a detection unit, an electromagnetic valve set, and a control module, wherein the detection unit is configured to detect a working state of an air spring, a detection signal is transmitted to the control module, the control module controls on/off of the electromagnetic valve set according to the detection signal to adjust a support height of the air spring, the control module includes a first power line transceiver unit, the first power line transceiver unit communicates with an external device and transmits electric energy, the detection unit, the electromagnetic valve set, and the control module form an actuator unit, and the actuator unit can be integrally disassembled and assembled.
The first power line transceiving unit is used for transceiving data information and transmitting electric energy, the data information comprises an external control instruction and data information generated by the ECAS integrated actuator, and the received external control instruction is sent to the control module; or sending data information generated by the ECAS integrated actuator to an external control unit; the data information generated by the ECAS integrated executor comprises one or more of the following information: the control module is used for controlling the starting and stopping state information, the data information collected by the detection unit or the working state information of the electromagnetic valve group;
the detection unit is used for acquiring data information of the air spring in the current detection environment in real time, and the data information comprises one or more of the following information: altitude information, pressure information, or temperature information;
the control module is used for controlling the start-stop state of the control module according to an external control instruction and receiving data information sent by the detection unit in real time when the control module is in the start state; judging whether the data information meets the standard data information or not, and generating a corresponding control signal when the data information does not meet the standard data information, wherein the control signal is used for controlling the air charging and discharging regulation of the air spring by the electromagnetic valve group;
and the electromagnetic valve group is used for controlling the air charging and discharging adjustment of the air spring according to the control signal so as to enable the vehicle to be in a preset state.
Through the scheme, the topological relation of system connection is greatly simplified, the connecting wire harness of the system is simplified, the system connectors are reduced, communication and power supply of all actuators and information centers are realized only by the annular bus consisting of two electric wires, the arrangement and installation of the whole vehicle are carried out under the scheme, only the installation of the actuators on the air springs is considered, the arrangement and installation process is greatly simplified, the configuration is flexible, the operating process duration of the system when the whole vehicle is arranged and installed is reduced, the interference resistance of the system to the electromagnetic environment is improved, and the stability of the system is improved.
As shown in fig. 3, the sensing unit includes various types of sensors including a pressure sensor for sensing the internal air pressure of the air spring and a height sensor for sensing the support height of the air spring.
The internal air pressure of the air spring is related to whether the air spring can improve the supporting force to enable the vehicle body to reach a preset height or reduce the supporting force to enable the vehicle body to be lowered to the preset height, and is also related to whether the air spring is in a safe state, and when an accident such as air leakage occurs, the air spring needs to be detected. Therefore, the pressure sensor is required to detect the internal air pressure of the air spring in real time, and the detection signal is used for intelligent control.
The supporting height of the air spring directly influences the height of a vehicle body and is influenced by road conditions, the supporting height of the air spring can change frequently in the driving process of the vehicle, so that a height sensor is required to detect in real time, and detection signals are used for intelligent control. In the embodiment, the height sensor is adopted to detect the supporting height of the air spring in real time, mechanical devices such as a swing rod and an angle sensor are not adopted any more, the structure is simplified, and the height sensor can be integrated.
Preferably, the height sensor is arranged at the first end of the air spring and comprises an image acquisition device and a light emitting device, the light emitting device irradiates light to the second end of the air spring to form an image spot (the second end of the air spring is provided with a reflecting plate, and the light irradiates the reflecting plate to form the image spot), the image acquisition device acquires the image spot and detects the support height of the air spring according to the brightness change of the image spot, so that wireless distance measurement is realized, and the support height of the air spring is measured quickly and accurately.
The first end of the air spring is usually the upper end of the air spring, the second end of the air spring is usually the lower end of the air spring, and the first end of the air spring is the lower end of the air spring, and the second end of the air spring is the upper end of the air spring.
The image acquisition device can adopt a camera, the light emitting device can adopt a laser emitting device, and the emitted light ensures enough brightness. The collection end of the image collection device can be provided with a light shield for blocking scattered light, so that the influence of the scattered light on data collected by the image collection device is reduced.
Specifically, the image acquisition device is used for transmitting a plurality of pixels in each frame of image information to the image processor according to a preset arrangement after acquiring the image information;
and the image processor is used for extracting a brightness value corresponding to the preset color from each pixel according to the index number of the one or more preset colors in the palette lookup table, accumulating the brightness values to obtain a brightness value sum, and sending the brightness value sum to the ranging control module, so that the ranging control module can calculate the height information between the first end part and the second end part according to the brightness value sum.
Further, the luminance value is inversely proportional to the square of the height information between the first end portion and the second end portion, and the calculation method is specifically as follows:
calculating height information between the first end and the second end
Wherein h is height information between the first end and the second end; l is a luminance value of the image information; k is a proportionality coefficient, and k is determined according to the parameters of the light emitting device, the parameters of the image acquisition device and the environmental factor between the first end part and the second end part.
It can be seen that each height sensor has its own independent k value, and the distance between the first end portion and the second end portion can be calculated by matching the brightness value of the image.
Preferably, the height sensor further comprises a communication interface unit, and the light emitting device and the image processor are connected with the ranging control module through the communication interface unit.
The ECAS integrated actuator can be arranged on the upper cover or the lower cover of the air spring, when the ECAS integrated actuator is arranged on the upper cover of the air spring, the light emitting device irradiates laser to the lower end part of the air spring to form an image spot, the brightness of the image spot can change along with the change of the irradiation distance, when the ECAS integrated actuator is arranged on the lower cover of the air spring, the laser emitting device irradiates laser to the upper end part of the air spring to form an image spot, and the brightness of the image spot can also change along with the change of the irradiation distance.
Preferably, the first power line transceiving unit employs a DCAN500 module. The communication and power supply of the actuator are realized by using a DCAN500 power carrier scheme, the wiring harness can be simplified to the maximum extent, and the communication between systems and the power supply requirement of the actuator are finished by using two wires.
Preferably, the detection unit further includes a temperature sensor for detecting an internal temperature of the air spring. The internal temperature of the air spring is directly related to the internal air pressure, and when the air pressure increases, the temperature increases, and when the air pressure decreases, the temperature decreases. Particularly, the supporting height of the air spring can change frequently in the running process of a vehicle, the internal temperature is possibly increased to a large extent, and the air spring or other components are damaged, so that the internal temperature of the air spring needs to be detected in real time by a temperature sensor, a detection signal is used for intelligent control, the height change amplitude and frequency of the air spring can be reduced when the internal temperature is abnormal, even the height change of the air spring is suspended, and the protection effect is achieved until the internal temperature of the air spring recovers to a normal value.
The Temperature sensor may be an NTC (Negative Temperature Coefficient) Temperature sensor, which is a thermistor having a Negative Temperature Coefficient and a resistance that decreases exponentially with a Temperature increase. The device has the advantages of small size, high measurement precision, high sensitivity, high stability and long service life.
The electromagnetic valve is provided with an inflation channel and an exhaust channel, needs to be communicated with a gas storage tank in a vehicle through an air inlet pipe and is communicated with the air spring through an exhaust pipe, the inflation channel of the electromagnetic valve is opened when the internal air pressure of the air spring is smaller than a required value, the air spring is inflated to improve the internal air pressure of the air spring, the exhaust channel of the electromagnetic valve is opened when the internal air pressure of the air spring is larger than the required value, the exhaust channel is exhausted to the outside to reduce the internal air pressure of the air spring, and the electromagnetic valve is closed when the internal air pressure of the air spring reaches the required value. A plurality of electromagnetic valves can be arranged for each air spring to form an electromagnetic valve group, and the electromagnetic valves can respectively bear the functions of inflation and exhaust and can also bear the functions of inflation and exhaust simultaneously.
As shown in fig. 3, the control module includes an MCU, a first acquisition module, a second acquisition module, a solenoid valve control module, a distance measurement control module, an internal CAN communication module, a first power line transceiver unit, and a power supply module;
the first acquisition module is respectively and electrically connected with the pressure sensor and the MCU, and the first acquisition module can adopt an AD acquisition module;
the second acquisition module is respectively and electrically connected with the temperature sensor and the MCU, and the second acquisition module can adopt an AD acquisition module;
the electromagnetic valve control module is electrically connected with the electromagnetic valve group and the MCU respectively;
the distance measurement control module is respectively and electrically connected with the height sensor and the MCU;
the inner CAN communication module is electrically connected with the MCU;
the first power line transceiving unit is electrically connected with the external main control unit, the power supply module and the MCU respectively;
the power supply module is electrically connected with the first power line transceiving unit and the MCU respectively.
The first acquisition module is used for acquiring detection signals of the pressure sensor, transmitting the detection signals to the MCU and performing one-way communication with the MCU;
the second acquisition module is used for acquiring detection signals of the temperature sensor, transmitting the detection signals to the MCU and performing one-way communication with the MCU;
the electromagnetic valve control module is used for controlling the electromagnetic valve group to adjust the air pressure of the air spring, detecting the working state of the electromagnetic valve group, sending a detection signal to the MCU and performing two-way communication with the MCU;
the distance measurement control module is used for controlling the height sensor to detect the support height of the air spring, sending a detection signal of the height sensor to the MCU and performing two-way communication with the MCU; the distance measurement control module can adopt an FPGA chip;
the inner CAN communication module is used for communicating with external detection equipment and bidirectionally communicating with the MCU; when the ECAS integrated actuator needs to be checked to determine whether the function of the device is normal or not and the performance of the ECAS integrated actuator is debugged, the external detection device CAN be electrically connected with the ECAS integrated actuator through the inner CAN communication module and is used for detecting the condition of each part.
The first power line transceiving unit is used for communicating with an external main control unit, transmitting electric energy and bidirectionally communicating with the MCU;
the power supply module is used for adjusting the electric energy input from the outside, supplying power to the ECAS integrated actuator and performing one-way communication with the MCU.
As shown in fig. 3, the ECAS integrated actuator is further provided with an electrical interface for the first power line transceiver unit to use when externally connected.
Preferably, the MCU, the first power line transceiving unit, the first acquisition module, the second acquisition module, the solenoid valve control module, the distance measurement control module, the inner CAN communication module and the power module are integrally arranged on the same circuit board, are arranged in a shell together with the solenoid valve group and are combined with the air spring, and the assembly and disassembly are convenient.
The ECAS integrated actuator in the embodiment has the following advantages:
parts such as a sensor and an electromagnetic valve of the air suspension are integrated into an execution device to complete the lifting control of the single air spring; the connection wiring harness of the actuator is further simplified based on the DCAN500 type power carrier scheme, and only two wires are needed to complete power supply and communication; the wireless ranging scheme is used to replace the conventional pendulum rod sensor, and the height sensor is successfully and efficiently integrated into the actuator content part.
The signal of the sensor is directly acquired in the actuator, and the air spring is directly driven to perform air charging and discharging actions after the signal is processed by an algorithm, so that the signal of the sensor is not required to be transmitted by a long wire harness, and the immunity of a complex electromagnetic environment is greatly improved.
Reduce pencil material cost to a certain extent to improve system stability, reduce the maintenance cost in later stage.
Example 2
Fig. 4 shows an embodiment 2 of the present invention, which provides an air suspension system including a plurality of air springs and a plurality of ECAS integrated actuators as described in embodiment 1, each of the ECAS integrated actuators controlling one of the air springs, the ECAS integrated actuators being provided on an upper cover or a lower cover of the air springs.
The plurality of air springs are typically distributed on both sides of the vehicle body, which can be raised or lowered as a whole, as well as in forward, rearward, side kneeling, etc. modes.
The ECAS integrated actuator is provided with a pressure sensor, a height sensor and a temperature sensor, wherein the height sensor and the temperature sensor are arranged inside the air spring, and the pressure sensor is arranged inside the air spring or on an air path.
As shown in fig. 4, the air suspension system further includes a main control unit, the main control unit is provided with a second power line transceiver unit, the second power line transceiver unit is electrically connected to the first power line transceiver unit of the ECAS integrated actuator, and the main control unit and the ECAS integrated actuator communicate with the first power line transceiver unit through the second power line transceiver unit and transmit electric energy;
the main control unit is connected with the whole vehicle system through a CAN bus and is used for carrying out data communication between the whole vehicle system and the air suspension system;
the main control unit is connected with a power supply unit of the whole vehicle system through a power line, and obtains electric energy from the power supply unit of the whole vehicle system.
The main control unit is also electrically connected with the air storage tank pressure sensor, can detect pressure parameters in the air storage tank, and sends out an alarm signal when the pressure in the air storage tank is insufficient, so as to remind a driver that the air spring cannot be normally used at the moment, so that the air storage tank needs to be inflated, or the air circuit of the air storage tank is overhauled.
Preferably, the ECAS integrated actuator is arranged on the upper cover of the air spring, does not occupy other installation space, and can be integrally disassembled and assembled. The ECAS integrated actuator can lift along with the upper cover of the air spring, and when the supporting height of the air spring changes, the height sensor in the ECAS integrated actuator can detect the supporting height of the air spring in real time.
The ECAS integrated actuator can also be arranged on the lower cover of the air spring, and the ECAS integrated actuator does not have position change along with the change of the supporting height of the air spring, but can still detect the supporting height of the air spring.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides an ECAS integrated form executor, includes detecting element, electromagnetism valves and control module, detecting element is used for detecting air spring's operating condition, and detection signal transmits extremely control module, control module basis detect signal control the break-make of electromagnetism valves, in order to adjust air spring's support height, its characterized in that, control module includes first power line transceiver unit, through first power line transceiver unit and external communication and transmission electric energy, detecting element the electromagnetism valves with control module constitutes the executor unit, the executor unit can whole dismouting.
2. The ECAS integrated actuator of claim 1, wherein the detection unit comprises a pressure sensor for detecting the internal air pressure of the air spring and a height sensor for detecting the support height of the air spring.
3. The ECAS integrated actuator of claim 2, wherein the sensing unit further comprises a temperature sensor for sensing an internal temperature of the air spring.
4. The ECAS integrated actuator of claim 3, wherein the first powerline transceiver unit employs a DCAN500 module;
the temperature sensor adopts an NTC temperature sensor.
5. The ECAS integrated actuator of claim 3, wherein the control module further comprises an MCU, a first acquisition module, a second acquisition module, a solenoid valve control module, a ranging control module, an inner CAN communication module and a power module;
the first acquisition module is respectively electrically connected with the pressure sensor and the MCU and is used for acquiring a detection signal of the pressure sensor and transmitting the detection signal to the MCU;
the second acquisition module is respectively electrically connected with the temperature sensor and the MCU and is used for acquiring a detection signal of the temperature sensor and transmitting the detection signal to the MCU;
the electromagnetic valve control module is respectively electrically connected with the electromagnetic valve group and the MCU and is used for controlling the electromagnetic valve group to regulate the air pressure of the air spring, detecting the working state of the electromagnetic valve group and sending a detection signal to the MCU;
the distance measurement control module is respectively electrically connected with the height sensor and the MCU and is used for controlling the height sensor to detect the support height of the air spring and sending a detection signal of the height sensor to the MCU;
the inner CAN communication module is electrically connected with the MCU and is used for communicating with external detection equipment;
the first power line transceiving unit is electrically connected with the external main control unit, the power supply module and the MCU respectively;
the power module is electrically connected with the first power line transceiving unit and the MCU respectively, and is used for adjusting electric energy input from the outside and supplying power to the ECAS integrated actuator.
6. The ECAS integrated actuator of claim 5, wherein the MCU, the first powerline transceiver unit, the first acquisition module, the second acquisition module, the solenoid valve control module, the ranging control module, the internal CAN communication module and the power module are integrated on a same circuit board.
7. The ECAS integrated actuator according to claim 2, wherein the height sensor is disposed at a first end of the air spring, the height sensor comprises an image capturing device and a light emitting device, the light emitting device irradiates light to a second end of the air spring to form an image spot, the image capturing device captures the image spot, and the support height of the air spring is detected according to the brightness change of the image spot.
8. An air suspension system comprising a plurality of air springs, and further comprising a plurality of ECAS integrated actuators according to any one of claims 1-7, each of said ECAS integrated actuators controlling one of said air springs, said ECAS integrated actuators being disposed on an upper or lower cover of said air springs.
9. The air suspension system of claim 8, wherein said ECAS integrated actuator is provided with a pressure sensor, a height sensor and a temperature sensor, said height sensor and said temperature sensor being disposed inside said air spring, said pressure sensor being disposed inside said air spring or on the air path.
10. The air suspension system of claim 8, further comprising a master control unit provided with a second power line transceiver unit electrically connected to a first power line transceiver unit of the ECAS integrated actuator, the master control unit and the ECAS integrated actuator communicating and transmitting electrical energy with the first power line transceiver unit through the second power line transceiver unit;
the main control unit is connected with a whole vehicle system through a CAN bus and is used for carrying out data communication between the whole vehicle system and the air suspension system;
the main control unit is connected with a power supply unit of the whole vehicle system through a power line, and electric energy is obtained from the power supply unit of the whole vehicle system.
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| CN202111458672.3A CN113928075A (en) | 2021-12-01 | 2021-12-01 | ECAS integrated actuator and air suspension system |
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| CN202111458672.3A CN113928075A (en) | 2021-12-01 | 2021-12-01 | ECAS integrated actuator and air suspension system |
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