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CN-121973581-A - Active adjustable electromagnetic-hydraulic composite energy accumulator of vehicle chassis and control method

CN121973581ACN 121973581 ACN121973581 ACN 121973581ACN-121973581-A

Abstract

The invention relates to the technical field of vehicle chassis suspension, and discloses an active adjustable electromagnetic-hydraulic composite energy accumulator of a vehicle chassis and a control method, wherein the active adjustable electromagnetic-hydraulic composite energy accumulator comprises an electromagnetic-hydraulic composite energy accumulator main body and a controller; the energy accumulator body is provided with an energy accumulator shell, a fixed electromagnetic system and a floating electromagnetic system are assembled in the energy accumulator shell, the fixed electromagnetic system comprises a fixed iron core and a fixed coil which are fixedly arranged at the bottom end in the energy accumulator shell, the floating electromagnetic system comprises a floating iron core and a floating coil, the floating iron core is slidably inserted into the inner side of the fixed iron core, the floating iron core isolates the inner space of the energy accumulator shell into an air cavity and a hydraulic oil cavity, a controller is respectively and electrically connected with the fixed coil and the floating coil, receives multi-source input signals and outputs current control instructions, drives the floating iron core to axially slide and displace, and changes the volume of the hydraulic oil cavity.

Inventors

  • DING JIA
  • Liao Shunlian

Assignees

  • 励瀚佳盛(广州)动力科技有限公司

Dates

Publication Date
20260505
Application Date
20260304

Claims (10)

  1. 1. The active adjustable electromagnetic-hydraulic composite accumulator of the vehicle chassis is characterized by comprising an electromagnetic-hydraulic composite accumulator main body (18) and a controller; The electromagnetic-hydraulic composite energy accumulator main body (18) is provided with an energy accumulator shell (2), wherein a fixed electromagnetic system and a floating electromagnetic system are assembled in the energy accumulator shell (2), the fixed electromagnetic system comprises a fixed iron core (4) and a fixed coil (3) which are fixedly arranged at the bottom end in the energy accumulator shell (2), the floating electromagnetic system comprises a floating iron core (8) and a floating coil (7), and the floating iron core (8) is sleeved on the inner side of the fixed iron core (4) in a sliding manner; The energy accumulator comprises an energy accumulator shell (2), a floating iron core (8), a controller, a multi-source input signal (21) and a current control command, wherein the energy accumulator shell (2) is internally isolated into an air cavity (14) and a hydraulic oil cavity (16), the controller is respectively and electrically connected with a fixed coil (3) and a floating coil (7), the controller receives the multi-source input signal (21) and outputs the current control command to the fixed coil (3) and the floating coil (7), an axial electromagnetic acting force is generated between a fixed electromagnetic system and the floating electromagnetic system, the floating iron core (8) is driven to axially slide and displace, and the volume of the hydraulic oil cavity (16) is changed.
  2. 2. The actively adjustable electromagnetic-hydraulic compound accumulator of a vehicle chassis according to claim 1, characterized in that the controller comprises a mode arbitration controller (22), an electromagnetic linear actuation control unit one (20) and an electromagnetic linear actuation control unit two (19), wherein the mode arbitration controller (22) is respectively in communication connection with the electromagnetic linear actuation control unit one (20) and the electromagnetic linear actuation control unit two (19), wherein the electromagnetic linear actuation control unit one (20) is in electrical connection with the floating coil (7), and wherein the electromagnetic linear actuation control unit two (19) is in electrical connection with the fixed coil (3).
  3. 3. The active adjustable electromagnetic-hydraulic composite accumulator of the vehicle chassis according to claim 2, wherein a sealing cover plate oil outlet hole (101) is formed in the bottom of the electromagnetic-hydraulic composite accumulator main body (18), the sealing cover plate oil outlet hole (101) is connected with a connecting oil pipe (24), the connecting oil pipe (24) is communicated with a suspension system (25), a pressure sensor (23) is installed on a pipeline of the connecting oil pipe (24), and the pressure sensor (23) is connected with the mode arbitration controller (22) to transmit pressure data output by the hydraulic oil cavity (16).
  4. 4. The active adjustable electromagnetic-hydraulic composite accumulator of the vehicle chassis according to claim 1, wherein the electromagnetic-hydraulic composite accumulator main body (18) comprises a sealing cover plate (1), a sealing upper cover (11) and a floating iron core sealing plate (10) arranged on the floating iron core (8), a sealing cover plate connecting bolt (102) is assembled on the sealing cover plate (1), a sealing bolt (12) is assembled on the sealing upper cover (11), the air cavity (14) is formed by enclosing the inner wall of the accumulator shell (2), the sealing upper cover (11) and the floating iron core sealing plate (10), a pre-pressing spring (13) is arranged in the central position inside the air cavity (14), the upper end of the pre-pressing spring (13) is connected with the sealing upper cover (11), and the lower end of the pre-pressing spring (13) is connected with the floating iron core sealing plate (10).
  5. 5. The active adjustable electromagnetic-hydraulic composite energy accumulator of the vehicle chassis according to claim 4, wherein a fixed iron core sealing ring (5) is embedded between the periphery of the outer side of the fixed iron core (4) and the inner wall of the energy accumulator shell (2), a floating iron core upper sealing ring (9) is embedded between the outer cylindrical surface of the floating iron core (8) and the inner wall of the energy accumulator shell (2), and a floating iron core sealing ring (6) is assembled between the outer side wall of the floating iron core (8) and the inner side wall of the fixed iron core (4).
  6. 6. The actively adjustable electromagnetic-hydraulic composite accumulator of a vehicle chassis according to claim 1, characterized in that the fixed coil (3) is led out with a fixed coil connecting wire (301), the fixed coil connecting wire (301) penetrates through the lower side wall of the accumulator housing (2) and is tightly locked by a fixed coil connecting wire fixing nut (17), the floating coil (7) is led out with a floating coil connecting wire (701), the floating coil connecting wire (701) penetrates through the side wall of the accumulator housing (2) and is tightly locked by a floating coil connecting wire fixing nut (15), the end part of the floating coil connecting wire (701) is connected with a floating coil connecting plug (702), and the floating coil connecting wire (701) leaves a length allowance inside the accumulator housing (2).
  7. 7. The actively tunable electro-magnetic-hydraulic compound accumulator of claim 2, wherein the mode arbitration controller (22) is embedded with a multi-layer sensor model, input features of the multi-layer sensor model include a current hydraulic pressure mean value, a first-order pressure change rate, a vehicle body vertical acceleration and a driving mode signal, output features of the multi-layer sensor model are target hydraulic pressures, and the mode arbitration controller (22) calculates a target control current based on the target hydraulic pressures.
  8. 8. The actively adjustable electromagnetic-hydraulic composite accumulator of claim 2, characterized in that the electromagnetic linear actuation control unit one (20) and the electromagnetic linear actuation control unit two (19) are internally integrated with a high-power amplifying circuit, and the mode arbitration controller (22) converts the resolved current command into a pulse width modulation signal and sends the pulse width modulation signal to the electromagnetic linear actuation control unit one (20) and the electromagnetic linear actuation control unit two (19), and regulates and controls the effective amplitude and the direction of the excitation current injected into the fixed coil (3) and the floating coil (7).
  9. 9. The actively adjustable electromagnetic-hydraulic composite accumulator of claim 2, characterized in that the mode arbitration controller (22) is internally integrated with an abnormal failure protection module, and the abnormal failure protection module issues an interrupt instruction to the electromagnetic linear actuation control unit one (20) and the electromagnetic linear actuation control unit two (19) to cut off current output when the instantaneous peak current exceeding a calibration limit threshold or the current effective value within a continuous sliding time window exceeding a coil rated thermal power limit condition is monitored to be met.
  10. 10. Method for controlling an actively adjustable electromagnetic-hydraulic compound accumulator of a vehicle chassis, characterized in that the actively adjustable electromagnetic-hydraulic compound accumulator of a vehicle chassis according to any one of claims 1-9 comprises the steps of: The mode arbitration controller (22) receives a multi-source input signal (21) in real time, and deduces a pitch angle and a roll angle of a vehicle body by fusing the multi-source input signal (21); The mode arbitration controller (22) respectively calculates probability weight scores of a longitudinal control channel, a lateral control channel and a vertical vibration feedback channel based on the longitudinal acceleration and the lateral acceleration of the vehicle, and performs weighted summation on the probability weight scores to obtain a total working condition deviation score; When the total working condition deviation score exceeds a dynamic calibration threshold condition to be met, substituting the total working condition deviation score into a nonlinear mechanical mapping calculation formula to calculate target hydraulic pressure by the mode arbitration controller (22), solving by combining pressure feedback data to obtain target control current, and adding a forward bias constant in a division denominator term of the target control current; The mode arbitration controller (22) is connected in series with a low-pass smoothing filter on an output bus to process the target control current, converts the processed target control current into a pulse width modulation signal and transmits the pulse width modulation signal to the electromagnetic linear actuation control unit I (20) and the electromagnetic linear actuation control unit II (19), regulates and controls the fixed coil (3) and the floating coil (7) to generate axial electromagnetic acting force, and drives the floating iron core (8) to displace to change the volume of the hydraulic oil cavity (16).

Description

Active adjustable electromagnetic-hydraulic composite energy accumulator of vehicle chassis and control method Technical Field The invention relates to the technical field of vehicle chassis suspensions, in particular to an active adjustable electromagnetic-hydraulic composite energy accumulator of a vehicle chassis and a control method. Background Vehicle chassis suspension systems typically utilize hydraulic accumulators to absorb road shocks and maintain line pressure. At present, a conventional hydraulic accumulator mostly adopts an inflatable passive structure, and passively absorbs fluid pulsation by means of compression and expansion of internal gas. This purely mechanical passive response mechanism is limited by the inherent laws of physical thermodynamics of the gas, resulting in an internal volume that cannot actively intervene according to external operating conditions. Passive accumulators often suffer from pressure regulation hysteresis when the vehicle is subjected to emergency braking, high speed steering, or a bumpy road, and cannot establish sufficient support stiffness to resist body pitch and roll at the first time. In order to make up for the deficiency of passive response, part of chassis systems introduce active control valves to regulate oil pressure. However, the common hydraulic regulating valve has a complex structure and a longer response period, and is easy to cause high-frequency oscillation of the system under the complex road conditions of frequent jump. Meanwhile, when the system which simply relies on the electric control valve to regulate the pressure is subjected to the power failure or communication failure of the whole vehicle, the pressure regulation and the energy storage buffer capacity are always thoroughly lost, so that the chassis is instantly lost in support, and serious potential safety hazards are brought. In addition, in the existing actuator control strategy, when the bottom layer algorithm processes division operation containing actual feedback deviation, once the actual feedback pressure completely coincides with the target pressure, the feedback deviation returns to zero to directly cause the microcontroller to generate zero removal overflow collapse, so that bottom layer hardware loses control signals to cause danger. In addition, at the switching moment of different driving modes, the step-type abrupt change of the driving current instruction is also very easy to excite serious fluid cavitation phenomenon and mechanical abnormal sound in the hydraulic pipeline. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an active adjustable electromagnetic-hydraulic composite accumulator of a vehicle chassis and a control method, and solves the technical problems that the pressure adjustment of the existing passive accumulator of the vehicle chassis is lagged, the buffering capacity is easy to lose completely when active adjusting equipment is powered off, zero overflow collapse is easy to occur in a bottom layer control algorithm, and pipeline cavitation abnormal sound is caused by high-frequency jump instructions. In order to achieve the above purpose, the invention is realized by the following technical scheme: The first aspect of the invention provides an actively adjustable electromagnetic-hydraulic composite accumulator of a vehicle chassis, comprising an electromagnetic-hydraulic composite accumulator body and a controller. The electromagnetic-hydraulic composite accumulator body is provided with an accumulator shell, and a fixed electromagnetic system and a floating electromagnetic system are assembled inside the accumulator shell. The fixed electromagnetic system comprises a fixed iron core and a fixed coil which are fixedly arranged at the bottom end inside the energy accumulator shell, the floating electromagnetic system comprises a floating iron core and a floating coil, and the floating iron core is sleeved on the inner side of the fixed iron core in a sliding manner. The floating iron core isolates the internal space of the accumulator shell into an air cavity and a hydraulic oil cavity. The controller is respectively electrically connected with the fixed coil and the floating coil, receives multi-source input signals and outputs current control instructions to the fixed coil and the floating coil. After the two groups of coils are electrified, axial electromagnetic acting force is generated between the fixed electromagnetic system and the floating electromagnetic system. The electromagnetic acting force directly drives the floating iron core to axially slide and displace, and the volume of the hydraulic oil cavity is changed. The structure is separated from the limitation that the traditional energy accumulator can only compress gas to passively absorb pulse, and the hydraulic pressure of the suspension system can be actively regulated in real time according to road conditions. The electromagnetic-hydraulic compos