Double-source integrated electric hydraulic power assisting system

Abstract

The utility model provides a double-source integrated electric hydraulic power-assisted system, which relates to the field of power-assisted steering and comprises a high-voltage power supply, a low-voltage power supply, a whole vehicle control and display module, a motor inversion control module, a double-source motor, a hydraulic pump and a steering system. The motor inversion control module is connected with the high-voltage power supply, the low-voltage power supply, the whole vehicle control and display module and the double-source motor; the double-source motor, the hydraulic pump and the steering system are sequentially connected. The motor inversion control module, the double-source motor and the hydraulic pump are installed through a mechanical structure to form a whole, the structure of the hydraulic power assisting system is simplified, and the overall weight and size of the system are reduced. And a high-voltage inverter controller and a low-voltage inverter controller in the motor inverter control module are of an integrated structure and are controlled by the same control panel, so that the replacement of emergency steering and conventional steering is smoother, and the speed and accuracy of power intervention are ensured.

Description

Technical Field

[0001] The utility model relates to the field of steering assist, in particular to a dual-source integrated electro-hydraulic power steering system. Background Art

[0002] In recent years, with the global emphasis on environmental protection and sustainable development, the new energy vehicle market has shown explosive growth. Consumers' acceptance of new energy vehicles has been continuously increasing, and their requirements for vehicle performance and safety have also become higher and higher.

[0003] In the improvement of vehicle safety performance, a crucial consideration is to prevent unexpected power assist failure of the steering system. For this reason, the vehicle should be equipped with an advanced backup emergency steering system, which can quickly and reliably take over when the main steering assist system encounters a fault or abnormality, providing necessary steering assistance to the driver and ensuring safe parking in case of an emergency.

[0004] In the currently widely used dual-source or dual-winding steering system, although a low-voltage emergency backup part is designed, this part is mostly idle during normal vehicle driving and is only activated in case of an emergency. This not only results in the need to configure the conventional power assist part according to the maximum power requirement, which has the problems of high cost, large size, and heavy weight; at the same time, due to the unreasonable replacement logic between the emergency steering and the conventional steering, there are problems of misintervention or slow intervention, resulting in abnormal conventional steering or slow intervention of the emergency steering, causing the steering wheel to jerk or abnormal steering. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a dual-source integrated electro-hydraulic power steering system, including: a high-voltage power supply, a low-voltage power supply, a vehicle control and display module, a motor inverter control module, a dual-source motor, a hydraulic pump, and a steering system;

[0006] The motor inverter control module is connected to the high-voltage power supply, the low-voltage power supply, the vehicle control and display module, and the dual-source motor;

[0007] The dual-source motor, the hydraulic pump, and the steering system are connected in sequence.

[0008] Preferably:

[0009] The hydraulic pump and the motor inverter control module are installed on the dual-source motor, and the hydraulic pump, the motor inverter control module, and the dual-source motor are of an integrated configuration.

[0010] Preferably, the motor inverter control module includes: a control board, a high-voltage inverter controller, and a low-voltage inverter controller;

[0011] The high-voltage inverter controller is fixedly arranged above the dual-source motor, the low-voltage inverter controller is fixedly arranged on one side of the dual-source motor, and the control board is fixedly arranged between the high-voltage inverter controller and the low-voltage inverter controller. The control board, the high-voltage inverter controller, and the low-voltage inverter controller are of an integrated configuration;

[0012] The vehicle control and display module is connected to the control board, the high-voltage power supply is connected to the high-voltage inverter controller, the low-voltage power supply is connected to the control board and the low-voltage inverter controller, and the control board is connected to the high-voltage inverter controller and the low-voltage inverter controller.

[0013] Preferably, the high-voltage inverter controller includes:

[0014] A CAN module, a first main switch, a first pre-charge module, a first drive capacitor, a PIM, an isolation drive, a first current sampling module, and a temperature sensor;

[0015] The vehicle control and display module, the CAN module, and the control board are connected in sequence;

[0016] The high-voltage power supply is connected to the first main switch and the first pre-charge module, and the first main switch and the first pre-charge module are connected to the first drive capacitor;

[0017] The first drive capacitor, the PIM, and the dual-source motor are connected in sequence;

[0018] The dual-source motor, the first current sampling module, the isolation drive, and the PIM are connected in sequence, and the isolation drive is connected to the control board;

[0019] The dual-source motor, the temperature sensor, and the control board are connected in sequence.

[0020] Preferably, the low-voltage inverter controller includes:

[0021] A second main switch, a second pre-charge module, a second drive capacitor, a drive MOS, a pre-drive module, a second current sampling module, and an angle sensor;

[0022] The low-voltage power supply is connected to the second main switch and the second pre-charge module, and the second main switch and the second pre-charge module are connected to the second drive capacitor;

[0023] The second drive capacitor, the drive MOS, and the dual-source motor are connected in sequence;

[0024] The dual-source motor, the second current sampling module, the pre-drive module, and the drive MOS are connected in sequence, and the pre-drive module is connected to the control board;

[0025] The dual-source motor, the angle sensor, and the control board are connected in sequence.

[0026] Preferably:

[0027] The dual-source motor includes: a high-voltage winding and a low-voltage winding.

[0028] Preferably:

[0029] The high-voltage winding is connected to the PIM in the high-voltage inverter controller through three-phase lines.

[0030] Preferably:

[0031] The low-voltage winding is connected to the driving MOS in the low-voltage inverter controller through three-phase lines.

[0032] The utility model has the following beneficial effects:

[0033] By installing the motor inverter control module, the dual-source motor and the hydraulic pump through a mechanical structure to form an integral whole, the structure of the hydraulic power assist system is simplified, and the overall weight and volume of the system are reduced. The high-voltage inverter controller and the low-voltage inverter controller in the motor inverter control module are of an integral structure and are controlled by the same control board, making the replacement between emergency steering and conventional steering smoother, and ensuring the speed and accuracy of the power assist intervention. Description of the Drawings

[0034] Figure 1 It is a structural diagram of a dual-source integrated electric hydraulic power assist system;

[0035] Figure 2 It is an installation schematic diagram of the hydraulic pump, the motor inverter control module and the dual-source motor;

[0036] 1 - Hydraulic pump, 2 - Dual-source motor, 3 - Motor inverter control module, 4 - High-voltage inverter controller, 5 - Low-voltage inverter controller;

[0037] Figure 3 It is a structural diagram of the motor inverter control module;

[0038] The realization, functional features and advantages of the purpose of the utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0039] It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0040] Referring to Figure 1 , the utility model provides a dual-source integrated electric hydraulic power assist system, including: a high-voltage power supply, a low-voltage power supply, a vehicle control and display module, a motor inverter control module, a dual-source motor, a hydraulic pump and a steering system;

[0041] The motor inverter control module is connected to the high-voltage power supply, the low-voltage power supply, the vehicle control and display module and the dual-source motor;

[0042] The dual-source motor, hydraulic pump, and steering system are connected in sequence.

[0043] Furthermore, referring to Figure 2 :

[0044] The hydraulic pump and the motor inverter control module are installed on the dual-source motor, and the hydraulic pump, motor inverter control module, and dual-source motor are of an integrated configuration.

[0045] Specifically, the motor inverter control module is installed on the dual-source motor and the hydraulic pump through a mechanical structure to form a whole; the motor inverter control module provides electric drive for the dual-source motor, the dual-source motor operates to provide power for the hydraulic pump, and the hydraulic pump provides assistance for the steering system of the whole vehicle.

[0046] Furthermore, the motor inverter control module includes: a control board, a high-voltage inverter controller, and a low-voltage inverter controller;

[0047] The high-voltage inverter controller is fixedly arranged above the dual-source motor, the low-voltage inverter controller is fixedly arranged on one side of the dual-source motor, the control board is fixedly arranged between the high-voltage inverter controller and the low-voltage inverter controller, and the control board, high-voltage inverter controller, and low-voltage inverter controller are of an integrated configuration;

[0048] The vehicle control and display module is connected to the control board, the high-voltage power supply is connected to the high-voltage inverter controller, the low-voltage power supply is connected to the control board and the low-voltage inverter controller, and the control board is connected to the high-voltage inverter controller and the low-voltage inverter controller.

[0049] Specifically, referring to Figure 2 , the high-voltage inverter controller 4 and the low-voltage inverter controller 5 are highly integrated at the top and tail of the dual-source motor, and the high-voltage inverter controller and the low-voltage inverter controller are controlled through a shared control board. The control board is connected to the two drive boards of the high-voltage inverter controller and the low-voltage inverter controller through internal wiring harnesses to achieve optimal allocation of resources. This structural design not only simplifies the structure but also enhances the overall performance and response speed of the system, and first solves the problems of high cost, large size, and heavy weight existing in the conventional assistance system.

[0050] Furthermore, referring to Figure 3 , the high-voltage inverter controller includes:

[0051] A CAN module, a first main switch, a first pre-charge module, a first drive capacitor, a PIM, an isolation drive, a first current sampling module, and a temperature sensor;

[0052] The vehicle control and display module, CAN module, and control board are connected in sequence;

[0053] The high-voltage power supply is connected to the first main switch and the first pre-charge module, and the first main switch and the first pre-charge module are connected to the first drive capacitor;

[0054] The first driving capacitor, PIM, and dual-source motor are connected in sequence.

[0055] The dual-source motor, the first current sampling module, the isolation drive, and the PIM are connected in sequence, and the isolation drive is connected to the control board.

[0056] The dual-source motor, the temperature sensor, and the control board are connected in sequence.

[0057] Furthermore, the low-voltage inverter controller includes:

[0058] The second main switch, the second pre-charge module, the second driving capacitor, the driving MOS, the pre-drive module, the second current sampling module, and the angle sensor;

[0059] The low-voltage power supply is connected to the second main switch and the second pre-charge module, and the second main switch and the second pre-charge module are connected to the second driving capacitor;

[0060] The second driving capacitor, the driving MOS, and the dual-source motor are connected in sequence;

[0061] The dual-source motor, the second current sampling module, the pre-drive module, and the driving MOS are connected in sequence, and the pre-drive module is connected to the control board;

[0062] The dual-source motor, the angle sensor, and the control board are connected in sequence.

[0063] Specifically, the high-voltage inverter controller monitors the operation of the vehicle's power assist system in real time. When in peak working conditions or when the main power assist system malfunctions, the low-voltage inverter controller starts to take over and provides additional hydraulic power assist for the vehicle to ensure the continuity and stability of steering. In addition, since the high-voltage inverter controller and the low-voltage inverter controller are of an integrated configuration, the power configuration of the high-voltage winding of the system can be reduced, and the overall weight and volume of the system are reduced. This not only improves the fuel economy of the vehicle but also enhances its dynamic performance and handling flexibility.

[0064] The high-voltage controller and the low-voltage controller of the conventional power assist system are installed separately and controlled by two independent control boards. In practical applications, due to the independent control of the high-voltage controller and the low-voltage controller, it is easy to cause unreasonable takeover logic between emergency steering and conventional steering, resulting in misintervention or slow intervention; leading to abnormal conventional steering or slow intervention of emergency steering, causing problems such as a hit on the steering wheel or abnormal steering. However, in the present utility model, the high-voltage inverter controller and the low-voltage inverter controller are controlled by a shared control board, which enhances the overall performance and response speed of the system. And the low-voltage inverter controller can sample the motor winding angle in real time through the angle sensor to achieve sensorless control, which can further improve the control accuracy and system efficiency.

[0065] Furthermore, referring to Figure 3 :

[0066] The dual-source motor includes: a high-voltage winding and a low-voltage winding.

[0067] The high-voltage winding is connected to the PIM in the high-voltage inverter controller through three-phase lines.

[0068] The low-voltage winding is connected to the driving MOS in the low-voltage inverter controller through three-phase lines.

[0069] Specifically, the PIM, as the power output of the high-voltage inverter controller, is connected to the high-voltage winding of the dual-source motor through three-phase lines, and the driving MOS, as the power output of the low-voltage inverter controller, is connected to the low-voltage winding of the dual-source motor through another set of three-phase lines.

[0070] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including that element.

[0071] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments. Among the unit claims listing several devices, several of these devices may be embodied by the same hardware item. The use of the words "first", "second", and "third", etc. does not indicate any order and these words may be interpreted as identifiers.

[0072] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A dual-source integrated electric hydraulic power assist system, characterized in that: include: High-voltage power supply, low-voltage power supply, vehicle control and display module, motor inverter control module, dual-source motor, hydraulic pump and steering system; The motor inverter control module is connected with the high voltage power supply, the low voltage power supply, the vehicle control and display module and the dual source motor; The dual-source motor, hydraulic pump and steering system are connected in sequence.

2. The dual-source integrated electric hydraulic power-assisting system according to claim 1, characterized in that: The hydraulic pump and the motor inverter control module are installed on the dual-source motor, and the hydraulic pump, the motor inverter control module and the dual-source motor are of an integrated configuration.

3. The dual-source integrated electric hydraulic power-assisting system according to claim 1, characterized in that: The motor inverter control module includes: a control board, a high voltage inverter controller and a low voltage inverter controller; The high-voltage inverter controller is fixedly arranged above the dual-source motor, the low-voltage inverter controller is fixedly arranged on one side of the dual-source motor, the control board is fixedly arranged between the high-voltage inverter controller and the low-voltage inverter controller, and the control board, the high-voltage inverter controller and the low-voltage inverter controller are of an integrated configuration; The vehicle control and display module is connected to the control board, the high-voltage power supply is connected to the high-voltage inverter controller, the low-voltage power supply is connected to the control board and the low-voltage inverter controller, and the control board is connected to the high-voltage inverter controller and the low-voltage inverter controller.

4. The dual-source integrated electric hydraulic power-assisting system according to claim 3, characterized in that: The high voltage inverter controller includes: CAN module, first main switch, first pre-charge module, first drive capacitor, PIM, isolation drive, first current sampling module and temperature sensor; The vehicle control and display module, CAN module and control board are connected in sequence; The high-voltage power supply is connected to the first main switch and the first pre-charging module, and the first main switch and the first pre-charging module are connected to the first driving capacitor; The first driving capacitor, the PIM and the dual-source motor are connected in sequence; The dual-source motor, the first current sampling module, the isolation driver and the PIM are connected in sequence, and the isolation driver is connected to the control board; The dual-source motor, temperature sensor and control board are connected in sequence.

5. The dual-source integrated electric hydraulic power-assisting system according to claim 3, characterized in that: The low voltage inverter controller includes: A second main switch, a second pre-charging module, a second driving capacitor, a driving MOS, a pre-driving module, a second current sampling module and an angle sensor; The low-voltage power supply is connected to the second main switch and the second pre-charging module, and the second main switch and the second pre-charging module are connected to the second driving capacitor; The second driving capacitor, the driving MOS and the dual-source motor are connected in sequence; The dual-source motor, the second current sampling module, the pre-drive module and the drive MOS are connected in sequence, and the pre-drive module is connected to the control board; The dual-source motor, angle sensor and control board are connected in sequence.

6. The dual-source integrated electric hydraulic power-assisting system according to claim 1, characterized in that: The dual-source motor includes: a high-voltage winding and a low-voltage winding.

7. The dual-source integrated electric hydraulic power-assisting system according to claim 6, characterized in that: The high voltage winding is connected to the PIM in the high voltage inverter controller through a three-phase line.

8. The dual-source integrated electric hydraulic power-assisting system according to claim 6, characterized in that: The low voltage winding is connected to a driving MOS in a low voltage inverter controller through a three-phase line.

Images