Steer-by-wire redundancy device, intelligent chassis steer-by-wire system and automobile

Abstract

The present disclosure relates to a kind of drive-by-wire steering redundancy device, intelligent chassis drive-by-wire steering system and car, it is related to control or vehicle technical field.Therein, the drive-by-wire steering redundancy device, comprising: first steering passage and second steering passage;The first steering passage and the second steering passage are respectively connected with the first pressure cavity and the second pressure cavity in cylinder;The first pressure cavity and the second pressure cavity are provided with the steering control mechanism connected with the controlled steering mechanism;Wherein, the first steering passage and the second steering passage are used to adjust the pressure difference between the first pressure cavity and the second pressure cavity;The steering control mechanism is used to control the controlled steering mechanism steering based on the pressure difference.The present disclosure embodiment can realize steering control.

Description

Technical Field

[0001] This disclosure relates to the field of control or automotive technology, and in particular to a redundant steer-by-wire device, an intelligent chassis steer-by-wire system, and an automobile. Background Technology

[0002] As automobiles evolve towards intelligence and electrification, intelligent chassis have become a focal point of competition. The main technologies of intelligent chassis are concentrated in areas such as steer-by-wire, suspension-by-wire, and brake-by-wire.

[0003] Steer-by-wire has evolved from mechanical steering, hydraulic steering, and electric steering. It eliminates the mechanical connection between the steering wheel and the steering gear, replacing it with steer-by-wire control, enabling automated steering, variable gear ratio, controllable return to center, and controllable road feel.

[0004] Specifically, existing steer-by-wire redundancy designs mostly employ dual power supplies, dual power supplies, or electro-hydraulic hybrid systems. These redundancy designs rely on a reliable power supply and the proper functioning of some sensors and controllers. However, when the vehicle's power supply fails completely, or when some key components (ECU, angle sensor, torque sensor, wiring harness, etc.) fail, the steering function will completely fail. The drawback of the steer-by-wire designs in existing technologies CN 120156587 A and CN 119551062 A is that, after eliminating the mechanical connection, there is no reliable redundancy design in case of steer-by-wire failure.

[0005] Based on the above, there is an urgent need for a technical solution for steer-by-wire to address the technical problem of steer-by-wire failure caused by the lack of reliable redundancy design. Utility Model Content

[0006] This disclosure proposes a redundant steer-by-wire device, an intelligent chassis steer-by-wire system, and corresponding technical solutions for automobiles.

[0007] According to one aspect of this disclosure, a steer-by-wire redundancy device is provided, comprising: a first steering path and a second steering path; the first steering path and the second steering path are respectively connected to a first pressure chamber and a second pressure chamber in a cylinder; a steering control mechanism connected to a controlled steering mechanism is provided between the first pressure chamber and the second pressure chamber.

[0008] The first steering passage and the second steering passage are used to adjust the pressure difference between the first pressure chamber and the second pressure chamber; the steering control mechanism is used to control the steering of the controlled steering mechanism based on the pressure difference.

[0009] Preferably, the steering control mechanism is connected to the controlled steering mechanism via a steering transmission mechanism; wherein the steering control mechanism drives the steering transmission mechanism to control the steering of the controlled steering mechanism.

[0010] Preferably, the steering transmission mechanism is connected to the controlled steering mechanism by passing sequentially through the first pressure chamber, the steering control mechanism, and the second pressure chamber.

[0011] Preferably, a first sealing mechanism, a second sealing mechanism, and a third sealing mechanism are respectively provided at the connection points between the steering transmission mechanism and the first pressure chamber, the steering control mechanism, and the second pressure chamber.

[0012] Preferably, the steering transmission mechanism is configured as a lead screw, which passes sequentially through the first pressure chamber, the steering control mechanism, and the second pressure chamber and is connected to the controlled steering mechanism.

[0013] Preferably, the steering control mechanism is configured as a piston mechanism disposed between the first pressure chamber and the second pressure chamber and within the cylinder body.

[0014] Preferably, the piston mechanism corresponding to the steering control mechanism is configured as a hydraulic piston disposed between the first pressure chamber and the second pressure chamber and within the cylinder body.

[0015] Preferably, the cylinder body is provided with a first passage connection mechanism and a second passage connection mechanism; the first steering passage and the second steering passage are respectively connected to the first pressure chamber and the second pressure chamber in the cylinder body through the first passage connection mechanism and the second passage connection mechanism.

[0016] Preferably, the first passage connection mechanism and the second passage connection mechanism form a hollow first protrusion and a hollow second protrusion on the outer side of the cylinder body, respectively.

[0017] Preferably, it further includes: a steering path control mechanism connected to the first steering path and the second steering path respectively; wherein, the steering path control mechanism is used to control the first steering path and the second steering path to control the first pressure in the first pressure chamber and the second pressure in the second pressure chamber.

[0018] Preferably, the steering path control mechanism connected to the first steering path and the second steering path respectively is configured as a reversing valve.

[0019] Preferably, the first diversion path includes: a pressure storage source assembly, a first pipeline, a first flow direction control assembly, a second flow direction control assembly opposite to the first flow direction, and a pressure relief assembly; wherein, one end of the first pipeline is connected to the pressure storage source assembly and the pressure relief assembly respectively, and the other end of the first pipeline is connected to the first pressure chamber; the second flow direction control assembly is disposed on a first sub-pipeline corresponding to the first pipeline whose one end is connected to the pressure storage source assembly, and the first flow direction control assembly is disposed on a second sub-pipeline corresponding to the first pipeline whose one end is connected to the pressure relief assembly.

[0020] Preferably, an overflow control mechanism is also provided on the second sub-pipeline corresponding to the first pipeline connected to the pressure storage source assembly.

[0021] Preferably, the other end of the first pipeline is connected to the steering path control mechanism, and the steering path control mechanism is connected to the first pressure chamber through a third pipeline.

[0022] Preferably, the pressure storage source component is configured as either a gas storage tank or an oil storage tank.

[0023] Preferably, the first flow direction control component and the second flow direction control component that is opposite to the first flow direction are respectively configured as a first check valve and a second check valve.

[0024] Preferably, the pressure relief assembly is configured as either a venting tank or an oil draining tank.

[0025] Preferably, the first steering passage includes: one of an air tank and an oil tank, a first pipeline, a first check valve, a second check valve, and one of a venting tank and an oil draining tank; wherein, one end of the first pipeline is connected to one of the air tank, the oil tank, and the venting tank and the oil draining tank respectively, and the other end of the first pipeline is connected to the first pressure chamber; the second check valve is disposed on a first sub-pipeline corresponding to the first pipeline whose one end is connected to one of the air tank and the oil tank, and the first check valve is disposed on a second sub-pipeline corresponding to the first pipeline whose one end is connected to one of the venting tank and the oil draining tank.

[0026] Preferably, an overflow control mechanism is also provided on the second sub-pipeline corresponding to the first pipeline connected to one of the venting tank and the oil drain tank.

[0027] Preferably, the other end of the first pipeline is connected to the reversing valve corresponding to the steering path control mechanism, and the reversing valve corresponding to the steering path control mechanism is connected to the first pressure chamber through a third pipeline.

[0028] Preferably, the directional valve corresponding to the steering path control mechanism is connected to the first pressure chamber in sequence through the third pipeline and the first passage connection mechanism provided in the cylinder; wherein, the first passage connection mechanism forms a hollow first protrusion on the outside of the cylinder.

[0029] Preferably, the second diversion path includes: a pressure storage source assembly, a second pipeline, a third flow direction control assembly, a fourth flow direction control assembly (opposite to the third flow direction), and a pressure relief assembly; wherein, one end of the second pipeline is connected to the pressure storage source assembly and the pressure relief assembly respectively, and the other end of the second pipeline is connected to the second pressure chamber; the third flow direction control assembly is disposed on the third sub-pipeline corresponding to the second pipeline whose one end is connected to the pressure storage source assembly, and the fourth flow direction control assembly is disposed on the fourth sub-pipeline corresponding to the second pipeline whose one end is connected to one of the pressure relief assemblies.

[0030] Preferably, an overflow control mechanism is also provided on the fourth sub-pipeline corresponding to the second pipeline connected to the pressure relief assembly.

[0031] Preferably, the other end of the second pipeline is connected to the steering path control mechanism, and the steering path control mechanism is connected to the second pressure chamber through the fourth pipeline.

[0032] Preferably, the pressure storage source component is configured as either a gas storage tank or an oil storage tank.

[0033] Preferably, the third flow direction control component and the fourth flow direction control component that is opposite to the third flow direction are configured as a third check valve and a fourth check valve.

[0034] Preferably, the pressure relief assembly is configured as an air vent and an oil vent.

[0035] Preferably, the second steering passage includes: one of an air tank and an oil tank, a second pipeline, a third check valve, a fourth check valve, and one of a venting tank and an oil draining tank; wherein, one end of the second pipeline is connected to one of the air tank, the oil tank, and the venting tank and the oil draining tank respectively, and the other end of the second pipeline is connected to the second pressure chamber; the third check valve is disposed on the third sub-pipeline corresponding to the second pipeline whose one end is connected to one of the air tank and the oil tank, and the fourth check valve is disposed on the fourth sub-pipeline corresponding to the second pipeline whose one end is connected to one of the venting tank and the oil draining tank.

[0036] Preferably, an overflow control mechanism is also provided on the fourth sub-pipeline corresponding to the second pipeline connected to one of the venting tank and the oil draining tank.

[0037] Preferably, the other end of the second pipeline is connected to the reversing valve corresponding to the steering path control mechanism, and the reversing valve corresponding to the steering path control mechanism is connected to the second pressure chamber through the fourth pipeline.

[0038] Preferably, the directional valve corresponding to the steering path control mechanism is connected to the second pressure chamber in sequence through the fourth pipeline and the second passage connection mechanism provided in the cylinder; wherein, the second passage connection mechanism forms a hollow second protrusion on the outside of the cylinder.

[0039] Preferably, one of the air tank, oil tank, and vent tank or oil tank can be configured as a shared air tank or oil tank for the first steering passage and the second steering passage; or, the first steering passage and the second steering passage are each configured with one of their own air tank, oil tank, vent tank, or oil tank.

[0040] Preferably, the cylinder body is configured as a spare cylinder; the spare cylinder is respectively provided with a first cylinder oil chamber corresponding to the first pressure chamber and a second cylinder oil chamber corresponding to the second pressure chamber; the first cylinder oil chamber and the second cylinder oil chamber are respectively connected to the first steering passage and the second steering passage.

[0041] Preferably, the spare cylinder is provided with a first spare cylinder connector corresponding to a hollow first protrusion and a second spare cylinder connector corresponding to a hollow second protrusion on its outer side; the oil chamber of the first cylinder is connected to the first steering passage through the first spare cylinder connector; the oil chamber of the second cylinder is connected to the second steering passage through the second spare cylinder connector.

[0042] Preferably, a steering control mechanism is provided between the first cylinder oil chamber and the second cylinder oil chamber of the spare cylinder.

[0043] Preferably, the steering control mechanism is configured to be disposed between the oil chamber of the first oil cylinder and the oil chamber of the second oil cylinder, and is located within the spare oil cylinder as a cylinder piston.

[0044] Preferably, it further includes: a controller connected to the first steering path and the second steering path respectively; wherein the controller is used to control the closing and / or opening of the first steering path and the second steering path respectively.

[0045] Preferably, the controller is also connected to a steering path control mechanism that is connected to the first steering path and the second steering path respectively; wherein, the controller is used to control the first steering path to communicate with the first pressure chamber and to control the second steering path to communicate with the second pressure chamber.

[0046] Preferably, it further includes: a pressure power mechanism; the pressure power mechanism is connected to the first steering passage and the second steering passage respectively.

[0047] Preferably, the pressure power mechanism is configured as a pump; the pump is connected to the first steering passage and the second steering passage respectively.

[0048] According to one aspect of this disclosure, an intelligent chassis steer-by-wire system is provided, comprising: a steering gear assembly, characterized in that the steering gear assembly is connected to a steer-by-wire redundancy device as described above; or,

[0049] The cylinder block of the aforementioned redundant steer-by-wire device is located or integrated inside the steering assembly.

[0050] Preferably, the steering assembly includes: a lead screw corresponding to the steering transmission mechanism in the steer-by-wire redundancy device; the lead screw is connected to the steering control mechanism and the controlled steering mechanism of the steer-by-wire redundancy device respectively.

[0051] Preferably, the steering assembly further includes: a first steering assembly body and a second steering assembly body; the cylinder block of the steer-by-wire redundant device is disposed or integrated between the first steering assembly body and the second steering assembly body.

[0052] Preferably, the first housing corresponding to the cylinder block of the steer-by-wire redundant device, the second housing corresponding to the first steering gear assembly body, and the third housing corresponding to the second steering gear assembly body are an integral housing.

[0053] Preferably, the lead screw of the steering transmission mechanism in the cylinder body is provided with a first sealing mechanism and a second sealing mechanism at the connection between the first steering gear assembly body and the second steering gear assembly body, respectively.

[0054] Preferably, the first sealing mechanism and the second sealing mechanism are respectively configured as a first sealing ring and a second sealing ring.

[0055] Preferably, the steering assembly is provided with a first chassis connection mechanism and / or a second chassis connection mechanism for connecting to the chassis; or, the first steering assembly body and the second steering assembly body of the steering assembly are respectively provided with a first chassis connection mechanism and / or a second chassis connection mechanism for connecting to the chassis.

[0056] Preferably, the first chassis connection mechanism is configured as a first connecting ear formed outward from the main body of the first steering gear assembly, and the first connecting ear is provided with a first connecting hole.

[0057] Preferably, the second chassis connection mechanism is configured as a second connecting ear formed outward from the body of the second steering gear assembly, and the second connecting ear is provided with a second connecting hole.

[0058] According to one aspect of this disclosure, an automobile is provided, comprising: a steering wheel assembly and a normally closed electromagnetic clutch connected to the steering wheel assembly; the normally closed electromagnetic clutch is respectively connected to a redundancy steer-by-wire device as described above and / or a first steering path and a second steering path in an intelligent chassis steer-by-wire system as described above; wherein the controlled steering mechanism is configured as a first wheel and a second wheel corresponding to a wheel.

[0059] Preferably, the vehicle further includes a pump; the normally closed electromagnetic clutch is connected to the first steering passage and the second steering passage respectively via the pump.

[0060] Preferably, the pump is connected to one or more pipelines in the first diversion passage, including the first pipeline, the first sub-pipeline of the first pipeline, and the second sub-pipeline of the first pipeline; and / or, the pump is connected to one or more pipelines in the second diversion passage, including the second pipeline, the third sub-pipeline of the second pipeline, and the fourth sub-pipeline of the second pipeline.

[0061] Preferably, the first wheel and the second wheel are respectively connected to the two ends of the lead screw corresponding to the steering transmission mechanism in the steer-by-wire redundant device and / or the intelligent chassis steer-by-wire system via the first steering tie rod and the second steering tie rod corresponding to the steering tie rod.

[0062] Preferably, it further includes: a steering motor; the steering motor is connected to the lead screw corresponding to the steering transmission mechanism in the redundant steer-by-wire device and / or the intelligent chassis steer-by-wire system.

[0063] Preferably, the steering motor is equipped with a motor transmission assembly, and the steering motor is connected to the lead screw corresponding to the steering transmission mechanism in the redundant steer-by-wire device and / or the intelligent chassis steer-by-wire system through the motor transmission assembly.

[0064] Preferably, the first steering tie rod is provided with a first tie rod ball housing and a first ball pin at both ends; the first tie rod ball housing and the first ball pin are respectively connected to one end of the lead screw corresponding to the steering transmission mechanism and the first wheel.

[0065] Preferably, the second steering tie rod is provided with a second tie rod ball housing and a second ball pin at both ends; the second tie rod ball housing and the second ball pin are respectively connected to the other end of the lead screw corresponding to the steering transmission mechanism and the second wheel.

[0066] In this disclosure, a steer-by-wire redundancy device, an intelligent chassis steer-by-wire system, and corresponding technical solutions for automobiles are proposed to address the technical problem of steer-by-wire failure caused by the lack of reliable redundancy design.

[0067] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0068] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0069] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0070] Figure 1 The diagram shows a schematic representation of a redundant steer-by-wire device, an intelligent chassis steer-by-wire system, and a vehicle according to embodiments of the present disclosure.

[0071] Figure 2 The diagram shows a cross-sectional view of a redundant steer-by-wire device, an intelligent chassis steer-by-wire system, and a cylinder block and steering gear assembly in a vehicle, according to embodiments of the present disclosure. Detailed Implementation

[0072] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0073] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0074] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0075] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0076] It is understood that the various method embodiments mentioned above in this disclosure can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further.

[0077] Figure 1 The diagram shows a schematic representation of a redundant steer-by-wire device, an intelligent chassis steer-by-wire system, and a vehicle according to embodiments of the present disclosure. Figure 2 Cross-sectional views are shown corresponding to the steer-by-wire redundancy device, the intelligent chassis steer-by-wire system, and the cylinder block and steering gear assembly in an automobile, according to embodiments of the present disclosure. Figure 1 and Figure 2 As shown, the steer-by-wire redundancy device includes: a first steering path and a second steering path; the first steering path and the second steering path are respectively connected to a first pressure chamber and a second pressure chamber in the cylinder; a steering control mechanism connected to the controlled steering mechanism is provided between the first pressure chamber and the second pressure chamber; wherein, the first steering path and the second steering path are used to adjust the pressure difference between the first pressure chamber and the second pressure chamber; the steering control mechanism is used to control the steering of the controlled steering mechanism based on the pressure difference. Based on existing steer-by-wire technology, by coordinating the first steering path, the second steering path, and the first and second pressure chambers in the cylinder, the pressure difference between the first pressure chamber and the second pressure chamber can be adjusted, thereby controlling the steering of the controlled steering mechanism based on the pressure difference, thus solving the technical problem of steer-by-wire failure caused by the lack of a reliable redundancy design.

[0078] In the embodiments of this disclosure and other possible embodiments, controlling the first steering passage and the second steering passage to be closed and / or open, the amount of oil or gas in the first pressure chamber increases or decreases / decreases or increases, and the resulting pressure difference drives the steering control mechanism in the cylinder to move in a first direction / a second direction opposite to the first direction, thereby driving the steering transmission mechanism to move along the first direction / a second direction opposite to the first direction, and further driving the controlled steering mechanism to turn in the first direction / a second direction opposite to the first direction.

[0079] For example, by controlling the first steering passage to close and the second steering passage to open, the steering control mechanism in the cylinder body moves in the first direction, the amount of oil or air in the first pressure chamber increases, and the resulting pressure difference drives the steering transmission mechanism to move along the first direction, thereby driving the controlled steering mechanism to turn in the first direction.

[0080] For example, by controlling the opening of the first steering passage and the closing of the second steering passage, the amount of oil or gas in the second pressure chamber increases or decreases / decreases or increases, and the resulting pressure difference drives the steering control mechanism in the cylinder to move in the second direction opposite to the first direction, thereby driving the steering transmission mechanism to move along the second direction, and in turn driving the controlled steering mechanism to turn in the second direction.

[0081] For example, by controlling the opening of the first steering passage and the second steering passage, the amount of oil or gas in the first pressure chamber increases, and the amount of oil or gas in the second pressure chamber decreases. The resulting pressure difference drives the steering control mechanism in the cylinder to move in the first direction, thereby driving the steering transmission mechanism to move along the first direction and in turn driving the controlled steering mechanism to turn in the first direction.

[0082] For example, by controlling the opening of the first steering passage and the second steering passage, the amount of oil or gas in the first pressure chamber decreases, and the amount of oil or gas in the second pressure chamber increases. The resulting pressure difference drives the steering control mechanism in the cylinder to move in a second direction opposite to the first direction, thereby driving the steering transmission mechanism to move along the second direction and in turn driving the controlled steering mechanism to turn in the second direction.

[0083] In embodiments of this disclosure and other possible embodiments, a pressure power mechanism is further included; the pressure power mechanism is connected to the first steering passage and the second steering passage respectively.

[0084] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the pump 3 is connected to the first steering passage and the second steering passage respectively.

[0085] In embodiments of this disclosure, the system further includes: a controller connected to the first steering path and the second steering path respectively; wherein the controller is used to control the closing and / or opening of the first steering path and the second steering path respectively.

[0086] In embodiments of this disclosure and other possible embodiments, the controller controls the first steering passage and the second steering passage to be in a closed state and / or open state, drives the steering control mechanism in the cylinder to move in a first direction / a second direction opposite to the first direction, increases or decreases / decreases or increases the amount of oil or gas in the first pressure chamber, drives the steering transmission mechanism to move along the first direction / a second direction opposite to the first direction, and then drives the controlled steering mechanism to turn in the first direction / a second direction opposite to the first direction.

[0087] In embodiments of this disclosure and other possible embodiments, the controller may be configured as a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a microcontroller, a microprocessor, or a single-chip microcomputer. For example, the controller may be configured as an STM32F0 single-chip microcomputer.

[0088] In embodiments of this disclosure and other possible embodiments, the controller and / or the first steering path and the second steering path communicate in a wired or wireless manner. For example, the controller may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the controller and / or the first steering path and the second steering path are configured with a first communication component, which may include a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0089] In embodiments of this disclosure, the steering control mechanism is connected to the controlled steering mechanism via a steering transmission mechanism; wherein the steering control mechanism drives the steering transmission mechanism to control the steering of the controlled steering mechanism.

[0090] In embodiments of this disclosure, the steering transmission mechanism is connected to the controlled steering mechanism by passing sequentially through the first pressure chamber, the steering control mechanism, and the second pressure chamber.

[0091] In the embodiments of this disclosure, a first sealing mechanism 14.1, a second sealing mechanism, and a third sealing mechanism 14.2 are respectively provided at the connection points between the steering transmission mechanism and the first pressure chamber, the steering control mechanism, and the second pressure chamber.

[0092] In the embodiments of this disclosure and other possible embodiments, the first sealing mechanism 14.1, the second sealing mechanism and the third sealing mechanism 14.2 may be configured as a first connecting sealing ring, a second connecting sealing ring and a third connecting sealing ring, respectively.

[0093] In embodiments of this disclosure and other possible embodiments, the steering transmission mechanism is configured as a lead screw 14, which passes sequentially through the first pressure chamber, the steering control mechanism and the second pressure chamber and is connected to the controlled steering mechanism.

[0094] In embodiments of this disclosure and other possible embodiments, the lead screw 14 may be configured as an existing ball screw; the ball screw passes sequentially through the first pressure chamber, the steering control mechanism and the second pressure chamber and is connected to the controlled steering mechanism.

[0095] In embodiments of this disclosure, the steering control mechanism is configured as a piston mechanism disposed between the first pressure chamber and the second pressure chamber and within the cylinder.

[0096] In embodiments of this disclosure and other possible embodiments, the piston mechanism corresponding to the steering control mechanism is configured to be disposed between the first pressure chamber and the second pressure chamber and in the cylinder piston 8.5 within the cylinder body.

[0097] In the embodiments of this disclosure, the cylinder body is provided with a first passage connection mechanism and a second passage connection mechanism; the first steering passage and the second steering passage are respectively connected to the first pressure chamber and the second pressure chamber inside the cylinder body through the first passage connection mechanism and the second passage connection mechanism.

[0098] In embodiments of this disclosure and other possible embodiments, the first passage connection mechanism and the second passage connection mechanism respectively form a hollow first protrusion and a hollow second protrusion on the outer side of the cylinder body.

[0099] In an embodiment of this disclosure, the redundant steer-by-wire device further includes: a steering path control mechanism connected to the first steering path and the second steering path respectively; wherein the steering path control mechanism is used to control the first steering path and the second steering path to control the first pressure in the first pressure chamber and the second pressure in the second pressure chamber.

[0100] In embodiments of this disclosure, the steering path control mechanism connected to the first steering path and the second steering path respectively is configured as a reversing valve 7.

[0101] In embodiments of this disclosure, the controller is further connected to a steering path control mechanism that is connected to the first steering path and the second steering path respectively; wherein, the controller is used to control the first steering path to communicate with the first pressure chamber and the second steering path to communicate with the second pressure chamber through the steering path control mechanism.

[0102] For example, when the controller controls the first steering passage to open, the controller controls the first steering passage to communicate with the first pressure chamber. As another example, when the controller controls the second steering passage to open, the controller controls the second steering passage to communicate with the second pressure chamber.

[0103] In embodiments of this disclosure, the controller is also connected to a steering path control mechanism that is connected to the first steering path and the second steering path respectively; wherein, the controller is used to control the first steering path to communicate with the first pressure chamber and the second steering path to communicate with the second pressure chamber through the directional valve 7 corresponding to the steering path control mechanism.

[0104] For example, when the controller controls the first steering passage to open, the controller controls the first steering passage to connect with the first pressure chamber through the reversing valve 7 corresponding to the steering passage control mechanism. As another example, when the controller controls the second steering passage to open, the controller controls the second steering passage and the second pressure chamber through the reversing valve 7 corresponding to the steering passage control mechanism.

[0105] In embodiments of this disclosure and other possible embodiments, the controller and / or the directional valve 7 corresponding to the steering path control mechanism communicate in a wired or wireless manner. For example, the controller may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the controller and / or the directional valve 7 corresponding to the steering path control mechanism are configured with a second communication component, which may include a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0106] In embodiments of this disclosure and other possible embodiments, the reversing valve can be configured as a two-position two-way reversing valve, which can be an existing normally closed two-position two-way reversing valve or a normally open two-position two-way reversing valve. The two-position two-way reversing valve has three oil / air ports, namely, working oil port / working air port 𝑎, oil inlet port / air inlet port 𝑝, and oil drain port / air drain port 1. (1) Normally closed two-position two-way directional valve: When in the static position, the oil inlet / air inlet is not connected to the working oil port / working air port, and the drain port / air port can be connected to the drain line / air line (the first directional passage and / or the second directional passage) to drain the oil or gas in the return spring and valve core cavity; when the two-position two-way directional valve is driven to operate, the oil inlet / air inlet is connected to the working oil port / working air port, and the oil or gas can flow from the oil inlet / air inlet to the working oil port / working air port, realizing the connection of the oil circuit or the air circuit. (2) Normally open two-position two-way directional valve: When in the static position, the oil inlet / air inlet is connected to the working oil port / working air port, and oil or gas can pass freely; when the two-position two-way directional valve is driven, the oil inlet / air inlet is disconnected from the working oil port / working air port, and the oil circuit is cut off.

[0107] In embodiments of this disclosure, the first redirection path includes: a pressure storage source assembly, a first pipeline 11.1, a first flow direction control assembly, a second flow direction control assembly opposite to the first flow direction, and a pressure relief assembly; wherein, one end of the first pipeline 11.1 is connected to the pressure storage source assembly and the pressure relief assembly respectively, and the other end of the first pipeline 11.1 is connected to the first pressure chamber; the second flow direction control assembly is disposed on a first sub-pipeline corresponding to the first pipeline 11.1 whose one end is connected to the pressure storage source assembly, and the first flow direction control assembly is disposed on a second sub-pipeline corresponding to the first pipeline 11.1 whose one end is connected to the pressure relief assembly.

[0108] In the embodiments of this disclosure, an overflow control mechanism is also provided on the second sub-pipeline corresponding to the first pipeline 11.1 connected to the pressure storage source assembly.

[0109] In an embodiment of this disclosure, the other end of the first pipeline 11.1 is connected to the steering path control mechanism, which is connected to the first pressure chamber via the third pipeline 11.2.

[0110] In the embodiments of this disclosure and other possible embodiments, the pressure storage source component is configured as either a gas storage tank or an oil storage tank 5.1; the first flow direction control component and the second flow direction control component opposite to the first flow direction are respectively configured as a first one-way valve 4.1 and a second one-way valve 4.2; the pressure relief component is configured as either a gas relief tank or an oil relief tank 5.2.

[0111] In the embodiments of this disclosure and other possible embodiments, the first steering passage includes: one of an air tank and an oil tank 5.1, a first pipeline 11.1, a first one-way valve 4.1, a second one-way valve 4.2, and one of a venting tank and an oil draining tank 5.2; wherein, one end of the first pipeline 11.1 is connected to one of the air tank, the oil tank 5.1, and the venting tank and the oil draining tank 5.2 respectively, and the other end of the first pipeline 11.1 is connected to the first pressure chamber; the second one-way valve 4.2 is disposed on a first sub-pipeline corresponding to the first pipeline 11.1 whose one end is connected to one of the air tank and the oil tank 5.1, and the first one-way valve 4.1 is disposed on a second sub-pipeline corresponding to the first pipeline 11.1 whose one end is connected to one of the venting tank and the oil draining tank 5.2.

[0112] In the embodiments of this disclosure and other possible embodiments, an overflow valve 6 corresponding to the overflow control mechanism is also provided on the second sub-pipeline corresponding to the first pipeline 11.1 connected to one of the vent tank and the oil drain tank 5.2.

[0113] In an embodiment of this disclosure, the other end of the first pipeline 11.1 is connected to the reversing valve corresponding to the steering path control mechanism, and the reversing valve corresponding to the steering path control mechanism is connected to the first pressure chamber through the third pipeline 11.2.

[0114] In the embodiments of this disclosure and other possible embodiments, the reversing valve corresponding to the steering passage control mechanism is connected to the first pressure chamber in sequence through the third pipeline 11.2 and the first passage connection mechanism provided in the cylinder body; wherein, the first passage connection mechanism forms a hollow first protrusion with a hollow flow channel on the outside of the cylinder body.

[0115] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the pump 3 is connected to the pressure storage source assembly and the pressure relief assembly of the first steering passage, respectively.

[0116] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the pump 3 is connected to one of the air tank, oil tank 5.1 and the vent tank and the vent tank 5.2 of the first steering passage.

[0117] In embodiments of this disclosure, the second redirection path includes: a pressure storage source assembly, a second pipeline 10.1, a third flow direction control assembly, a fourth flow direction control assembly (opposite to the third flow direction), and a pressure relief assembly; wherein, one end of the second pipeline 10.1 is connected to the pressure storage source assembly and the pressure relief assembly respectively, and the other end of the second pipeline 10.1 is connected to the second pressure chamber; the third flow direction control assembly is disposed on the third sub-pipeline corresponding to the second pipeline 10.1 whose one end is connected to the pressure storage source assembly, and the fourth flow direction control assembly is disposed on the fourth sub-pipeline corresponding to the second pipeline 10.1 whose one end is connected to one of the pressure relief assemblies.

[0118] In the embodiments of this disclosure, an overflow control mechanism is also provided on the fourth sub-pipeline corresponding to the second pipeline 10.1 connected to the pressure relief assembly.

[0119] In an embodiment of this disclosure, the other end of the second pipeline 10.1 is connected to the steering path control mechanism, which is connected to the second pressure chamber via the fourth pipeline 10.2.

[0120] In embodiments of this disclosure, the pressure storage source assembly is configured as either a gas storage tank or an oil storage tank 5.1. The third flow direction control assembly and the fourth flow direction control assembly, which is opposite to the third flow direction, are configured as a third one-way valve 4.3 and a fourth one-way valve 4.4. The pressure relief assembly is configured as a gas relief tank and an oil relief tank 5.2.

[0121] In the embodiments of this disclosure and other possible embodiments, the second steering passage includes: one of an air tank and an oil tank 5.1, a second pipeline 10.1, a third one-way valve 4.3, a fourth one-way valve 4.4, and one of a venting tank and an oil draining tank 5.2; wherein, one end of the second pipeline 10.1 is connected to one of the air tank, the oil tank 5.1, and the venting tank and the oil draining tank 5.2 respectively, and the other end of the second pipeline 10.1 is connected to the second pressure chamber; the third one-way valve 4.3 is disposed on the third sub-pipeline corresponding to the second pipeline 10.1 connected at one end to one of the air tank and the oil tank 5.1, and the fourth one-way valve 4.4 is disposed on the fourth sub-pipeline corresponding to the second pipeline 10.1 connected at one end to one of the venting tank and the oil draining tank 5.2.

[0122] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the pump 3 is connected to the pressure storage source assembly and the pressure relief assembly of the second steering passage, respectively.

[0123] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the pump 3 is connected to one of the air tank, oil tank 5.1 and the vent tank and the vent tank 5.2 of the second steering passage.

[0124] In the embodiments of this disclosure and other possible embodiments, the controller is connected to the first one-way valve 4.1, the second one-way valve 4.2, the third one-way valve 4.3 and the fourth one-way valve 4.4 respectively, and is used to control the opening or closing of the first one-way valve 4.1, the second one-way valve 4.2, the third one-way valve 4.3 and the fourth one-way valve 4.4.

[0125] In embodiments of this disclosure and other possible embodiments, the controller and / or the first one-way valve 4.1, the second one-way valve 4.2, the third one-way valve 4.3, and the fourth one-way valve 4.4 communicate via wired or wireless means. For example, the controller can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the controller and / or the first one-way valve 4.1, the second one-way valve 4.2, the third one-way valve 4.3, and the fourth one-way valve 4.4 are configured with a first communication component, which may include a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0126] In the embodiments of this disclosure, an overflow valve 6 corresponding to the overflow control mechanism is also provided on the fourth sub-pipeline corresponding to the second pipeline 10.1 connected to one of the vent tank and the oil drain tank 5.2.

[0127] In embodiments of this disclosure and other possible embodiments, the controller is also connected to the overflow valve 6 corresponding to the overflow control mechanism, for controlling the opening and closing of the overflow valve 6 corresponding to the overflow control mechanism.

[0128] In embodiments of this disclosure and other possible embodiments, the controller and / or the overflow valve 6 corresponding to the overflow control mechanism communicate in a wired or wireless manner. For example, the controller may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the controller and / or the overflow valve 6 corresponding to the overflow control mechanism are configured with a third communication component, which may include a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0129] In an embodiment of this disclosure, the other end of the second pipeline 10.1 is connected to the reversing valve corresponding to the steering path control mechanism, and the reversing valve corresponding to the steering path control mechanism is connected to the second pressure chamber through the fourth pipeline 10.2.

[0130] In the embodiments of this disclosure and other possible embodiments, the reversing valve corresponding to the steering passage control mechanism is connected to the second pressure chamber in sequence through the fourth pipeline 10.2 and the second passage connection mechanism provided in the cylinder body; wherein, the second passage connection mechanism forms a hollow second protrusion with a hollow flow channel on the outside of the cylinder body.

[0131] In the embodiments of this disclosure and other possible embodiments, one of the gas storage tank and oil storage tank 5.1 and one of the venting tank and oil draining tank 5.2 can be configured as a shared gas storage tank or oil storage tank for the first steering passage and the second steering passage; or, the first steering passage and the second steering passage can be separately configured with one of their respective gas storage tanks and oil storage tanks 5.1 and one of the venting tanks and oil draining tanks 5.2.

[0132] In the embodiments of this disclosure and other possible embodiments, a second one-way valve 4.2, a third one-way valve 4.3, and an oil storage tank 5.1 are connected between the first pipeline 11.1 and the second pipeline 10.1 corresponding to the first steering passage and the second steering passage to form an oil suction circuit.

[0133] In the embodiments of this disclosure and other possible embodiments, a first check valve 4.1, a fourth check valve 4.4, an overflow valve 6, and an oil storage tank 5.1 are connected between the first pipeline 11.1 and the second pipeline 10.1 corresponding to the first steering passage and the second steering passage to form a pressure relief circuit.

[0134] In the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be closed, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be open. The amount of oil or gas in the first pressure chamber increases or decreases, and the resulting pressure difference drives the steering control mechanism in the cylinder to move in the first direction, thereby driving the steering transmission mechanism to move along the first direction, and then driving the controlled steering mechanism to turn in the first direction.

[0135] Similarly, in the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be in the open state, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be in the closed state. The amount of oil or gas in the first pressure chamber decreases or increases, and the resulting pressure difference drives the steering control mechanism in the cylinder to move in the second direction opposite to the first direction, thereby driving the steering transmission mechanism to move along the second direction, and thus driving the controlled steering mechanism to turn in the second direction.

[0136] In an embodiment of this disclosure, the cylinder body is configured as a spare cylinder 8; the spare cylinder 8 is respectively configured with a first cylinder oil chamber 8.3 corresponding to the first pressure chamber and a second cylinder oil chamber 8.4 corresponding to the second pressure chamber; the first cylinder oil chamber 8.3 and the second cylinder oil chamber 8.4 are respectively connected to the first steering passage and the second steering passage.

[0137] In the embodiments of this disclosure and other possible embodiments, the outer side of the spare cylinder 8 is provided with a first spare cylinder connector 8.1 corresponding to a hollow first protrusion and a second spare cylinder connector 8.2 corresponding to a hollow second protrusion; the first cylinder oil chamber 8.3 is connected to the first steering passage through the first spare cylinder connector 8.1; the second cylinder oil chamber 8.4 is connected to the second steering passage through the second spare cylinder connector 8.2.

[0138] In the embodiments of this disclosure, a steering control mechanism is provided between the first cylinder oil chamber 8.3 and the second cylinder oil chamber 8.4 of the spare cylinder 8.

[0139] In embodiments of this disclosure, the steering control mechanism is configured as a cylinder piston 8.5 disposed between the first cylinder oil chamber 8.3 and the second cylinder oil chamber 8.4 and within the spare cylinder 8.

[0140] In the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be closed, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be open. The amount of oil in the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber increases or decreases. The resulting pressure difference drives the cylinder piston 8.5 corresponding to the steering control mechanism in the spare cylinder 8 to move to the right (first direction), which drives the lead screw 14 corresponding to the steering transmission mechanism to move along the first direction, thereby driving the controlled steering mechanism to turn in the first direction.

[0141] Similarly, in the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be in the open state, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be in the closed state. The amount of oil in the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber decreases or increases. The resulting pressure difference drives the cylinder piston 8.5 corresponding to the steering control mechanism in the spare cylinder 8 to move to the left (the second direction opposite to the first direction), which drives the lead screw 14 corresponding to the steering transmission mechanism to move along the second direction, thereby driving the controlled steering mechanism to turn in the second direction.

[0142] An embodiment of this disclosure also proposes an intelligent chassis steer-by-wire system, comprising: a steering assembly 9; the steering assembly 9 being connected to a steer-by-wire redundancy device as described above; or, the cylinder block of the steer-by-wire redundancy device as described above being disposed within the steering assembly 9.

[0143] In an embodiment of this disclosure, the steering assembly 9 includes: a lead screw 14 corresponding to the steering transmission mechanism in the steer-by-wire redundancy device; the lead screw 14 is connected to the steering control mechanism and the controlled steering mechanism of the steer-by-wire redundancy device respectively.

[0144] In embodiments of this disclosure, the steering assembly 9 further includes: a first steering assembly body 9.1 and a second steering assembly body 9.2; the cylinder block of the steer-by-wire redundant device is disposed or integrated between the first steering assembly body 9.1 and the second steering assembly body 9.2.

[0145] In the embodiments of this disclosure and other possible embodiments, the first housing corresponding to the cylinder of the steer-by-wire redundant device, the second housing corresponding to the first steering gear assembly body 9.1, and the third housing corresponding to the second steering gear assembly body 9.2 are an integral housing.

[0146] In the embodiments of this disclosure, the lead screw 14 corresponding to the steering transmission mechanism in the cylinder body is provided with a first sealing mechanism 14.1 and a second sealing mechanism 14.1 at the connection between the first steering gear assembly body 9.1 and the second steering gear assembly body 9.2, respectively.

[0147] In embodiments of this disclosure and other possible embodiments, the first sealing mechanism 14.1 and the second sealing mechanism 14.1 are respectively configured as a first sealing ring and a second sealing ring.

[0148] In embodiments of this disclosure, the steering assembly 9 is provided with a first chassis connection mechanism 9.11 and / or a second chassis connection mechanism 9.12 for connecting to the chassis; or, the first steering assembly body 9.1 and the second steering assembly body 9.2 of the steering assembly 9 are respectively provided with the first chassis connection mechanism 9.11 and / or the second chassis connection mechanism 9.12 for connecting to the chassis.

[0149] In embodiments of this disclosure and other possible embodiments, the first chassis connection mechanism 9.11 is configured as a first connecting ear formed outward from the first steering gear assembly body 9.1, and the first connecting ear is provided with a first connecting hole.

[0150] In embodiments of this disclosure and other possible embodiments, the second chassis connection mechanism 9.12 is configured as a second connecting ear formed outward from the second steering gear assembly body 9.2, and the second connecting ear is provided with a second connecting hole.

[0151] In the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be closed, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be open. The amount of oil in the first pressure chamber or the second pressure chamber increases or decreases, and the resulting pressure difference drives the steering control mechanism in the cylinder body to move in the first direction, thereby driving the lead screw 14 corresponding to the steering transmission mechanism to move along the first direction, and thus driving the controlled steering mechanism to turn in the first direction.

[0152] Similarly, in the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be in the open state, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be in the closed state. The oil volume in the first pressure chamber or the second pressure chamber decreases or increases. The steering control mechanism in the pressure difference cylinder moves in the second direction opposite to the first direction, driving the lead screw 14 corresponding to the steering transmission mechanism to move along the second direction, thereby driving the controlled steering mechanism to turn in the second direction.

[0153] An embodiment of this disclosure also proposes an automobile, including: a steering wheel assembly 1 and a normally closed electromagnetic clutch 2 connected to the steering wheel assembly 1; the normally closed electromagnetic clutch 2 is respectively connected to the first steering path and the second steering path of the above-described steer-by-wire redundant device and / or the above-described intelligent chassis steer-by-wire system; wherein the controlled steering mechanism is configured as a first wheel 13.1 and a second wheel 13.2 corresponding to wheel 13.

[0154] In embodiments of this disclosure, the automobile further includes: a pressure power mechanism; the normally closed electromagnetic clutch 2 is connected to the first steering passage and the second steering passage respectively through the pressure power mechanism.

[0155] In embodiments of this disclosure and other possible embodiments, the pressure power mechanism is configured as a pump 3; the normally closed electromagnetic clutch 2 is connected to the first steering passage and the second steering passage respectively through the pump 3.

[0156] In embodiments of this disclosure, the pump 3 is connected to one or more pipelines of the first pipeline 11.1, the first sub-pipeline of the first pipeline 11.1, and the second sub-pipeline of the first pipeline 11.1 in the first diversion passage; and / or, the pump 3 is connected to one or more pipelines of the second pipeline 10.1, the third sub-pipeline of the second pipeline 10.1, and the fourth sub-pipeline of the second pipeline 10.1 in the second diversion passage.

[0157] In the embodiments of this disclosure and other possible embodiments, the first wheel 13.1 and the second wheel 13.2 are respectively connected to the two ends of the lead screw 14 corresponding to the steering transmission mechanism in the steer-by-wire redundant device and / or the intelligent chassis steer-by-wire system via the first steering tie rod 15.1 and the second steering tie rod 15.2 corresponding to the steering tie rod 15; and / or,

[0158] In embodiments of this disclosure, the system further includes: a steering motor 12; the steering motor 12 is connected to a lead screw 14 corresponding to the steering transmission mechanism in the redundant steer-by-wire device and / or the intelligent chassis steer-by-wire system.

[0159] In embodiments of this disclosure and other possible embodiments, the steering motor 12 is equipped with a motor drive assembly, and the steering motor 12 is connected to the lead screw 14 corresponding to the steering transmission mechanism in the redundant steer-by-wire device and / or the intelligent chassis steer-by-wire system through the motor drive assembly.

[0160] In the embodiments of this disclosure and other possible embodiments, the first steering tie rod 15.1 is provided with a first tie rod ball housing 15.11 and a first ball pin 15.12 at both ends; the first tie rod ball housing 15.11 and the first ball pin 15.12 are respectively connected to one end of the lead screw 14 corresponding to the steering transmission mechanism and the first wheel 13.1.

[0161] In the embodiments of this disclosure and other possible embodiments, the two ends of the second steering tie rod 15.2 are respectively provided with a second tie rod ball housing 15.21 and a second ball pin 15.22; the second tie rod ball housing 15.21 and the second ball pin 15.22 are respectively connected to the other end of the lead screw 14 corresponding to the steering transmission mechanism and the second wheel 13.2.

[0162] In the embodiments disclosed herein and other possible embodiments, based on the existing steer-by-wire system, a spare cylinder 8 corresponding to the cylinder body is added in the rack direction of the steering gear assembly 9. Simultaneously, a normally closed clutch 2 is connected in series at the lower end of the steering wheel assembly 1, and a pump 3 (gear pump) corresponding to the pressure power mechanism is connected in series with the normally closed clutch 2. When the steering wheel of the steering wheel assembly 1 turns right (first direction), the oil outlet (first oil hole) of the pump 3 (gear pump) corresponding to the pressure power mechanism turns right through the first pipeline 11.1. At the same time, the oil inlet chamber of the spare cylinder 8 corresponding to the cylinder body (connected to the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber) is connected through the second pipeline 10.1 and the oil outlet chamber of the spare cylinder 8 corresponding to the cylinder body (connected to the second cylinder oil chamber 8.4 corresponding to the second pressure chamber or the first cylinder oil chamber 8.3 corresponding to the first pressure chamber), forming the main oil circuit for hydraulic redundant steering.

[0163] In the embodiments disclosed herein and other possible embodiments, when the vehicle's power supply is normal and all relevant components (ECU, angle sensor, torque sensor, wiring harness, etc.) are in good condition, turning on the vehicle's ignition switch disengages the normally closed electromagnetic clutch 2, and the steering wheel assembly 1 is separated from the pump 3 (gear pump) corresponding to the pressure power mechanism. At this time, the steer-by-wire redundancy device is in its basic functional state, and the spare cylinder 8 corresponding to the cylinder block is in standby mode. Using the existing steering motor 12, the vehicle's steering is controlled by the lead screw 14 (ball screw) corresponding to the steering transmission mechanism in the intelligent chassis steer-by-wire system, through the motor transmission assembly and the steer-by-wire redundancy device and / or connected to the motor transmission assembly.

[0164] In the embodiments of this disclosure and other possible embodiments, a piston cylinder 8.5 corresponding to a piston mechanism is added to the outside of the lead screw 14 corresponding to the existing steering transmission mechanism, and a cylinder body is added to the housing of the steering assembly 9. The lead screw 14 and the first pressure chamber and the second pressure chamber corresponding to the cylinder body after adding the piston cylinder piston 8.5 corresponding to the piston mechanism are also added.

[0165] In the embodiments disclosed herein and other possible embodiments, when the vehicle's power supply fails or key components of the steer-by-wire system (ECU, angle sensor, torque sensor, wiring harness, etc.) fail, potentially causing the basic function of the steer-by-wire to fail, the normally closed electromagnetic clutch 2 de-energizes and closes, connecting the steering wheel assembly 1 to the pump 3 (gear pump) corresponding to the pressure power mechanism. At this time, the basic function of the steer-by-wire is in a failed state, and the backup cylinder 8 corresponding to that cylinder is activated. At this time, turning the steering wheel assembly 1 to the right drives the pump 3 (gear pump) corresponding to the pressure power mechanism, expelling high-pressure oil through the first pipeline 11.1 into the right steering oil inlet chamber on the left side of the spare cylinder 8 corresponding to the cylinder body (the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber). Simultaneously, another oil hole of the pump 3 (gear pump) corresponding to the pressure power mechanism draws oil from the low-pressure chamber of the spare cylinder 8 corresponding to the cylinder body (the second cylinder oil chamber 8.4 corresponding to the second pressure chamber or the first cylinder oil chamber 8.3 corresponding to the first pressure chamber) and the oil reservoir 5.1 corresponding to the pressure storage source assembly through the second pipeline 10.1. Similarly, turning the steering wheel to the left completes the left turn, that is, the steering wheel assembly 1 rotates in the opposite direction, the oil outlet and oil inlet of the gear pump 3 are interchanged, the output force direction of the steering gear assembly 9 is reversed, completing the opposite direction of steering, realizing the redundant design function of the steer-by-wire system.

[0166] In the embodiments of this disclosure and other possible embodiments, based on the existing steer-by-wire technology, a spare hydraulic cylinder 8 is added in the rack direction of the steering gear assembly 9. At the same time, a normally closed electromagnetic clutch 2 (disconnected when energized and closed when de-energized) is connected to the lower end of the steering wheel assembly 1. The upper end of the normally closed electromagnetic clutch 2 is connected to the lower end of the steering wheel assembly 1 structure, and the lower end of the normally closed electromagnetic clutch 2 is connected to the drive shaft of the pump 3 (gear pump). The oil inlet and outlet of the pump 3 (gear pump) are respectively connected to the oil inlet chamber (the first pressure chamber or the first cylinder oil chamber 8.3 corresponding to the first pressure chamber) and the oil outlet chamber (the second pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber) of the cylinder body (e.g., the spare cylinder 8). Simultaneously, the oil inlet chamber (the first pressure chamber or the first cylinder oil chamber 8.3 corresponding to the first pressure chamber) and the oil outlet chamber (the second pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber) of the cylinder body (e.g., the spare cylinder 8) are connected to the first steering passage and the second steering passage by a two-position two-way directional valve. Furthermore, the steering operation of the first wheel 13.1 and the second wheel 13.2 corresponding to the wheel 13 is achieved by rotating the steering wheel of the steering wheel assembly 1.

[0167] In the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be closed, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be open. This drives the cylinder piston 8.3 in the spare cylinder 8 to move to the right (first direction). The amount of oil in the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber increases or decreases, which drives the lead screw 14 to move along the first direction, thereby driving the first wheel 13.1 and the second wheel 13.2 to rotate, completing the right (first direction) steering of the whole vehicle.

[0168] Similarly, in the embodiments of this disclosure and other possible embodiments, the first one-way valve 4.1 of the first steering passage and the third one-way valve 4.3 of the second steering passage are controlled to be in the open state, and the second one-way valve 4.2 of the first steering passage and the fourth one-way valve 4.4 of the second steering passage are controlled to be in the closed state. This drives the cylinder piston 8.3 in the spare cylinder 8 to move to the left (the second direction opposite to the first direction). The amount of oil in the first cylinder oil chamber 8.3 corresponding to the first pressure chamber or the second cylinder oil chamber 8.4 corresponding to the second pressure chamber decreases or increases, causing the lead screw 14 to move along the second direction, thereby driving the first wheel 13.1 and the second wheel 13.2 to rotate, completing the vehicle's left (second direction) steering.

[0169] This technical solution completely solves the problem in existing steer-by-wire technologies where steering cannot be performed when the vehicle's power supply fails completely or key components (ECU, angle sensor, torque sensor, wiring harness, etc.) fail, greatly improving the reliability of steer-by-wire and facilitating its widespread adoption. Furthermore, by employing this hydraulic redundancy technology, it can replace the original dual-power, dual-motor, or electro-hydraulic hybrid redundancy designs, simplifying the structure.

[0170] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A redundant steering-by-wire device, characterized in that, include: A first steering passage and a second steering passage; the first steering passage and the second steering passage are respectively connected to a first pressure chamber and a second pressure chamber in the cylinder; a steering control mechanism connected to the controlled steering mechanism is provided between the first pressure chamber and the second pressure chamber. The first steering passage and the second steering passage are used to adjust the pressure difference between the first pressure chamber and the second pressure chamber. The steering control mechanism is used to control the steering of the controlled steering mechanism based on the pressure difference.

2. The steer-by-wire redundancy device according to claim 1, characterized in that, The steering control mechanism is connected to the controlled steering mechanism via a steering transmission mechanism; wherein the steering control mechanism drives the steering transmission mechanism to control the steering of the controlled steering mechanism; and / or, The steering transmission mechanism is connected to the controlled steering mechanism by passing sequentially through the first pressure chamber, the steering control mechanism, and the second pressure chamber; and / or... The connection points between the steering transmission mechanism and the first pressure chamber, the steering control mechanism, and the second pressure chamber are respectively provided with a first sealing mechanism, a second sealing mechanism, and a third sealing mechanism; and / or, The steering control mechanism is configured as a piston mechanism disposed between the first pressure chamber and the second pressure chamber and within the cylinder.

3. The steer-by-wire redundancy device according to any one of claims 1 or 2, characterized in that, The cylinder body is provided with a first passage connection mechanism and a second passage connection mechanism; the first steering passage and the second steering passage are respectively connected to the first pressure chamber and the second pressure chamber in the cylinder body through the first passage connection mechanism and the second passage connection mechanism. And / or, It also includes: a steering path control mechanism connected to the first steering path and the second steering path respectively; wherein, the steering path control mechanism is used to control the first steering path and the second steering path to control the first pressure in the first pressure chamber and the second pressure in the second pressure chamber.

4. The steer-by-wire redundancy device according to any one of claims 1-3, characterized in that, The first redirection path includes: a pressure storage source assembly, a first pipeline, a first flow direction control assembly, a second flow direction control assembly (opposite to the first flow direction), and a pressure relief assembly; wherein, one end of the first pipeline is connected to the pressure storage source assembly and the pressure relief assembly, and the other end of the first pipeline is connected to the first pressure chamber; the second flow direction control assembly is disposed on a first sub-pipeline corresponding to the first pipeline whose one end is connected to the pressure storage source assembly, and the first flow direction control assembly is disposed on a second sub-pipeline corresponding to the first pipeline whose one end is connected to the pressure relief assembly; and / or An overflow control mechanism is also provided on the second sub-pipeline corresponding to the first pipeline connected to the pressure storage source assembly; and / or, the other end of the first pipeline is connected to the steering path control mechanism, and the steering path control mechanism is connected to the first pressure chamber through a third pipeline.

5. The steer-by-wire redundancy device according to any one of claims 1-4, characterized in that, The second diversion path includes: a pressure storage source assembly, a second pipeline, a third flow direction control assembly, a fourth flow direction control assembly (opposite to the third flow direction), and a pressure relief assembly; wherein one end of the second pipeline is connected to the pressure storage source assembly and the pressure relief assembly, and the other end of the second pipeline is connected to the second pressure chamber; the third flow direction control assembly is disposed on the third sub-pipeline corresponding to the second pipeline whose one end is connected to the pressure storage source assembly, and the fourth flow direction control assembly is disposed on the fourth sub-pipeline corresponding to the second pipeline whose one end is connected to one of the pressure relief assemblies; and / or, An overflow control mechanism is also provided on the fourth sub-pipeline corresponding to the second pipeline connected to the pressure relief assembly; and / or, the other end of the second pipeline is connected to the steering path control mechanism, and the steering path control mechanism is connected to the second pressure chamber through the fourth pipeline.

6. The steer-by-wire redundancy device according to any one of claims 1-5, characterized in that, The cylinder body is configured as a spare cylinder; the spare cylinder is respectively equipped with a first cylinder oil chamber corresponding to the first pressure chamber and a second cylinder oil chamber corresponding to the second pressure chamber; the first cylinder oil chamber and the second cylinder oil chamber are respectively connected to the first steering passage and the second steering passage. And / or, A steering control mechanism is provided between the first cylinder oil chamber and the second cylinder oil chamber of the spare cylinder; and / or, the steering control mechanism is configured to be located between the first cylinder oil chamber and the second cylinder oil chamber and is a cylinder piston in the spare cylinder. And / or, It also includes: a controller connected to the first steering path and the second steering path respectively; wherein the controller is used to control the closing or opening of the first steering path and the second steering path respectively; and / or, the controller is also connected to a steering path control mechanism connected to the first steering path and the second steering path respectively; wherein the controller is used to control the first steering path to communicate with the first pressure chamber and to control the second steering path to communicate with the second pressure chamber.

7. An intelligent chassis steer-by-wire system, comprising: The steering assembly is characterized in that it is connected to the steer-by-wire redundancy device as described in any one of claims 1-6; or, The cylinder block of the steer-by-wire redundancy device as described in any one of claims 1-6 is disposed within the steering assembly.

8. The intelligent chassis steer-by-wire system according to claim 7, characterized in that, The steering assembly includes: a lead screw corresponding to the steering transmission mechanism in the redundant steer-by-wire device; the lead screw is connected to both the steering control mechanism and the controlled steering mechanism of the redundant steer-by-wire device; and / or, The steering assembly further includes: a first steering assembly body and a second steering assembly body; the cylinder block of the steer-by-wire redundancy device is disposed or integrated between the first steering assembly body and the second steering assembly body; and / or, In the cylinder, the lead screw corresponding to the steering transmission mechanism is respectively provided with a first sealing mechanism and a second sealing mechanism at the connection between the first steering gear assembly body and the second steering gear assembly body; and / or, The steering assembly is provided with a first chassis connection mechanism and / or a second chassis connection mechanism for connecting to the chassis; or, the first steering assembly body and the second steering assembly body of the steering assembly are respectively provided with a first chassis connection mechanism and / or a second chassis connection mechanism for connecting to the chassis.

9. A car, comprising: A steering wheel assembly and a normally closed electromagnetic clutch connected to the steering wheel assembly, characterized in that the normally closed electromagnetic clutch is respectively connected to the first steering path and the second steering path of the steer-by-wire redundant device as described in any one of claims 1-6 and / or the intelligent chassis steer-by-wire system as described in any one of claims 7 or 8; wherein the controlled steering mechanism is configured as a first wheel and a second wheel corresponding to the wheel.

10. The automobile according to claim 9, characterized in that, Also includes: Pressure power mechanism; the normally closed electromagnetic clutch is connected to the first steering passage and the second steering passage respectively through the pressure power mechanism; And / or, The first wheel and the second wheel are respectively connected to the two ends of the steering transmission mechanism in the steer-by-wire redundant device and / or the intelligent chassis steer-by-wire system via the first steering tie rod and the second steering tie rod corresponding to the steering tie rod. And / or, Also includes: steering motor; The steering motor is connected to the steering transmission mechanism in the redundant steer-by-wire device and / or the intelligent chassis steer-by-wire system.

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