CN-121973580-A - Continuous damping variable suspension control unit and automobile chassis suspension system

CN121973580ACN 121973580 ACN121973580 ACN 121973580ACN-121973580-A

Abstract

The embodiment of the invention provides a continuous damping variable suspension control unit and an automobile chassis suspension system. The continuous damping variable suspension control unit comprises a power module, a signal acquisition module, a control module and a driving execution module, wherein the ‌ signal acquisition module ‌ comprises a first connector male end which is used for connecting a plurality of vehicle sensors and acquiring vehicle sensor signals, the driving execution module ‌ is used for responding to damping adjustment instructions generated by the control module based on a damping control algorithm according to the vehicle sensor signals to adjust the damping characteristics of the vehicle, the driving execution module comprises a valve driving module and a second connector male end, the valve driving module comprises a half-bridge driving chip and a low-side driving chip ‌, the half-bridge driving chip is matched with the low-side driving chip to control the opening and closing of the plurality of electromagnetic valves through the output current of the coil discharging adjustment control module, and the first connector male end or the second connector male end comprises a main control interface and a redundant interface, so that the reliability of real-time control damping of the vehicle is improved.

Inventors

HUANG YANGRONG
FU LIN
MA LIANGCAN
XIAO ZIHAN
WU JIABAO

Assignees

上汽通用五菱汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260205

Claims (10)

1. The continuous damping variable suspension control unit is characterized by comprising a power supply module, a signal acquisition module, a control module and a driving execution module; The power supply module is respectively connected with the signal acquisition module and the control module and is used for supplying power to the signal acquisition module and the control module; ‌ the signal acquisition module ‌ includes a first connector male end for connecting a plurality of vehicle sensors and acquiring vehicle sensor signals; The control module is used for receiving the vehicle sensor signal and generating a damping adjustment instruction based on a damping control algorithm according to the vehicle sensor signal; The driving execution module ‌ is used for responding to the damping adjustment instruction to drive a plurality of electromagnetic valves to adjust the damping characteristics of the vehicle, the driving execution module comprises a valve driving module and a second connector male end, the valve driving module comprises a half-bridge driving chip and a low-side driving chip ‌, and the half-bridge driving chip is matched with the low-side driving chip to adjust the output current of the control module through coil discharge to control the opening and closing of the electromagnetic valves; The first connector male end or the second connector male end comprises a main control interface and a redundant interface.
2. The continuous damping variable suspension control unit of claim 1, further comprising a third connector male end, said control module comprising a Printed Circuit Board Assembly (PCBA) and a Micro Control Unit (MCU), said PCBA being connected to a thermistor, said thermistor being connected to said MCU; the PCBA is connected with the power module, the power module is connected with the MCU, and the power module is connected with the male end of the third connector; the third connector male end is used for being connected with the third connector female end, and the third connector female end is used for being connected with the storage battery and the ignition switch power supply system respectively.
3. The continuous damping variable suspension control unit according to claim 2, wherein said signal acquisition module ‌ further comprises a decoding module and a signal transceiver module, said first connector male end being connected to said decoding module, said decoding module being connected to said signal transceiver module through said PCBA, said signal transceiver module being connected to said MCU, said power module being connected to said signal transceiver module; the first connector male end is used for being connected with a first connector female end, and the first connector female end is used for being connected with a plurality of vehicle sensors.
4. The continuous damping variable suspension control unit according to claim 2, characterized by further comprising a body attitude sensor; The vehicle body posture sensor is connected with the MCU, and the vehicle body posture sensor is connected with the PCBA.
5. The continuous damping variable suspension control unit according to claim 2, comprising said MCU connected to said valve drive module, said PCBA connected to said valve drive module, said drive execution module further comprising a high-precision resistor and an operational amplifier; The PCBA is connected with the high-precision resistor, the high-precision resistor is connected with the valve driving module, the PCBA is connected with the operational amplifier, the operational amplifier is connected with the high-precision resistor, and the valve driving module is connected with the male end of the second connector; the second connector male end is used for being connected with the second connector female end, and the second connector female end is used for being connected with a plurality of electromagnetic valves.
6. The continuous damping variable suspension control unit according to claim 3, further comprising a fourth connector male end; The male end of the fourth connector is connected with the PCBA and the information receiving and transmitting module; the male end of the fourth connector is used for being connected with the female end of the fourth connector, and the female end of the fourth connector is used for being connected with the CAN bus.
7. The continuous damping variable suspension control unit according to claim 2, wherein said PCBA is connected with an upper housing, a lower housing and a heat sink gel, respectively, said upper housing is connected with a housing screw, said housing screw is connected with said lower housing, said lower housing is connected with said heat sink gel; The lower shell is used for being connected with the control body and the support bolt, the control body and the support bolt are used for being connected with the controller support, the controller support is used for being connected with the support and the vehicle body nut, and the support and the vehicle body nut are used for being connected with the vehicle body.
8. The continuous damping variable suspension control unit according to claim 1, wherein said plurality of vehicle sensors includes a front left acceleration sensor, a front right acceleration sensor, a rear right height sensor and a rear left height sensor; The plurality of electromagnetic valves comprise a left front subtracting electromagnetic valve, a right front subtracting electromagnetic valve, a left rear subtracting electromagnetic valve and a right rear subtracting electromagnetic valve.
9. The continuous damping variable suspension control unit according to claim 4, characterized in that said body attitude sensor comprises an inertial measurement unit 6 axis sensor.
10. An automobile chassis suspension system, characterized by comprising the continuous damping variable suspension control unit according to any one of claims 1-9, and a storage battery, an ignition switch power supply system, a CAN bus, a plurality of electromagnetic valves and a plurality of sensors which are connected with the continuous damping variable suspension control unit to cooperatively realize suspension damping continuous variable control.

Description

Continuous damping variable suspension control unit and automobile chassis suspension system Technical Field The invention relates to the technical field of damping adjustment of an electric control suspension, in particular to a continuous damping variable suspension control unit and an automobile chassis suspension system. Background The continuous damping variable suspension control unit may be applied to a semi-active suspension system that continuously adjusts the damping of a shock absorber through a solenoid valve to improve the steering stability and riding comfort of a vehicle. The semi-active suspension system mainly comprises four shock absorbers with electromagnetic valves, a continuous damping variable suspension control unit, a vehicle body attitude sensor and a wheel end sensor. The interface redundancy of the continuous damping variable suspension control unit is insufficient, the connector only supports the main control function (such as sensor signal input and electromagnetic valve control instruction output), and an independent redundant interface is lacked, so that the main control function is required to be interrupted for parameter calibration, fault diagnosis or dynamic optimization. In addition, the electromagnetic valve driving circuit adopts single-chip half-bridge driving, has slow current regulation response (> 20 ms), is difficult to match with the real-time damping requirement of high-speed road surface impact (such as a deceleration strip and a pit), and influences the real-time control reliability of the vehicle. Disclosure of Invention In view of this, the embodiment of the invention provides a continuous damping variable suspension control unit and an automobile chassis suspension system, which are used for improving the reliability of real-time damping control of a vehicle. In one aspect, the embodiment of the invention provides a continuous damping variable suspension control unit, which comprises a power supply module, a signal acquisition module, a control module and a driving execution module; The power supply module is respectively connected with the signal acquisition module and the control module and is used for supplying power to the signal acquisition module and the control module; ‌ the signal acquisition module ‌ includes a first connector male end for connecting a plurality of vehicle sensors and acquiring vehicle sensor signals; The control module is used for receiving the vehicle sensor signal and generating a damping adjustment instruction based on a damping control algorithm according to the vehicle sensor signal; The driving execution module ‌ is used for responding to the damping adjustment instruction to drive a plurality of electromagnetic valves to adjust the damping characteristics of the vehicle, the driving execution module comprises a valve driving module and a second connector male end, the valve driving module comprises a half-bridge driving chip and a low-side driving chip ‌, and the half-bridge driving chip is matched with the low-side driving chip to adjust the output current of the control module through coil discharge to control the opening and closing of the electromagnetic valves; The first connector male end or the second connector male end comprises a main control interface and a redundant interface. Optionally, the control module comprises a Printed Circuit Board Assembly (PCBA) and a Micro Control Unit (MCU), wherein the PCBA is connected with a thermistor, and the thermistor is connected with the MCU; the PCBA is connected with the power module, the power module is connected with the MCU, and the power module is connected with the male end of the third connector; the third connector male end is used for being connected with the third connector female end, and the third connector female end is used for being connected with the storage battery and the ignition switch power supply system respectively. Optionally, the signal acquisition module ‌ further includes a decoding module and a signal transceiver module, where the first connector male end is connected with the decoding module, the decoding module is connected with the signal transceiver module through the PCBA, the signal transceiver module is connected with the MCU, and the power module is connected with the signal transceiver module; the first connector male end is used for being connected with a first connector female end, and the first connector female end is used for being connected with a plurality of vehicle sensors. Optionally, the vehicle body posture sensor is also included; The vehicle body posture sensor is connected with the MCU, and the vehicle body posture sensor is connected with the PCBA. Optionally, the device comprises the MCU, the valve driving module, the PCBA, the high-precision resistor and the operational amplifier, wherein the MCU is connected with the valve driving module; The PCBA is connected with the high-precision resistor, the high-precision resistor