Subframe assembly for vehicle, method for controlling vehicle, and vehicle

Abstract

The invention discloses an auxiliary frame assembly for a vehicle, a control method of the vehicle and the vehicle. The auxiliary frame assembly comprises a vehicle body longitudinal beam, an auxiliary frame and a controller, and the auxiliary frame is connected to the vehicle body longitudinal beam through a connecting part; the controller is in signal connection with the connecting part, and the controller is used for controlling the connecting part to move to separate the vehicle body longitudinal beam from the auxiliary frame when a preset separation condition is met. According to the auxiliary frame assembly, active separation control over the auxiliary frame and the vehicle body longitudinal beam is achieved, the problem that in the related technology, the falling consistency of the auxiliary frame is difficult to guarantee is effectively solved, and the safety and reliability of a vehicle under the collision condition are improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a subframe assembly for a vehicle, a control method for a vehicle, and a vehicle. Background Art

[0002] In the field of automotive design, the powertrain system, body system, chassis system, etc. are important components of an automobile. Among them, the suspension system in the chassis system plays a key role, providing support, buffering, and force transmission for the vehicle. With the increasingly strict automotive-related regulations and collision performance requirements, the consideration of the suspension system in terms of automotive collision safety has become particularly important. Specifically, the suspension needs to ensure that the vehicle does not intrude into the cab during a collision, thus avoiding harm to the occupants inside the vehicle to ensure the collision safety of the automobile.

[0003] In this context, the design of the mounting points of the subframe faces higher requirements. An ideal subframe mounting point should not only be able to provide reliable fixation, but also cause the subframe to be detached from the vehicle body instantaneously during a collision, thereby inducing the direction of the front-side collision force, reducing the collision energy on the vehicle body, and further protecting the physical safety of the occupants inside the vehicle.

[0004] In the related art, when the subframe is subjected to a relatively large collision force, its front mounting point will only passively separate from the subframe, making it difficult to effectively ensure the consistency of the subframe detachment. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a subframe assembly for a vehicle. According to the subframe assembly of the present invention, active separation control between the subframe and the vehicle body longitudinal beam is achieved, effectively alleviating the problem that it is difficult to ensure the consistency of subframe detachment in the related art, and improving the safety and reliability of the vehicle in the event of a collision.

[0006] The present invention also provides a vehicle having the above subframe assembly

[0007] The present invention also provides a control method for a vehicle having the above subframe assembly.

[0008] The present invention also provides a vehicle applying the above control method.

[0009] The subframe assembly according to the present invention is used for a vehicle, and the subframe assembly includes: a vehicle body longitudinal beam; a subframe, the subframe is connected to the vehicle body longitudinal beam through a connecting component; a controller, the controller is signal-connected to the connecting component, and the controller is configured to control the connecting component to move to separate the vehicle body longitudinal beam from the subframe when a preset separation condition is reached.

[0010] For the subframe assembly according to the present invention, a signal connection is established between the controller and the connecting component, enabling the controller to obtain the status information of the connecting component in real time and send control instructions to the connecting component. Separation conditions are preset, and the separation conditions can be flexibly set according to the actual situation and safety requirements of the vehicle. For example, it can be set that when the vehicle collides, the collision force detected by the collision sensor reaches a certain threshold, or when specific changes occur in parameters such as the acceleration and speed of the vehicle, as the separation condition. When the preset separation condition is reached during the vehicle's driving, the controller immediately sends a control signal to the connecting component to control the connecting component to separate the body longitudinal beam from the subframe. The active control method avoids the passive separation method relying on a large collision force in the prior art, making the detachment of the subframe no longer affected by the fluctuation of the collision force, thereby greatly improving the consistency of the subframe detachment.

[0011] According to some embodiments of the present invention, the connecting component includes: a fixing member fixedly provided on one of the body longitudinal beam and the subframe; a movable member movably provided on the fixing member, the movable member being signal-connected to the controller to move relative to the fixing member under the control of the controller, so that the movable member is disengaged from or engaged with the other of the body longitudinal beam and the subframe.

[0012] According to some embodiments of the present invention, a guiding groove extending axially and open at the end is formed in the fixing member, at least part of the movable member is slidably provided in the guiding groove, a fastening portion is formed at the end of the movable member, and the movable member can slide along the guiding groove to disengage from or engage with the other of the body longitudinal beam and the subframe.

[0013] According to some embodiments of the present invention, a locking hole is formed in the other of the body longitudinal beam and the subframe, the movable member is rotatably provided on the fixing member, and the fastening portion passes through the locking hole; wherein, the shape of the fastening portion is strip-shaped, the locking hole is configured as a strip-shaped hole adapted to the shape of the fastening portion, and the controller can control the rotation of the movable member to switch between a locked state and an unlocked state; in the locked state, the extending direction of the fastening portion forms an angle with the extending direction of the strip-shaped hole, so that the strip-shaped hole prevents the movable member from moving axially towards the inside of the guiding groove; in the unlocked state, the extending direction of the fastening portion is aligned with the extending direction of the strip-shaped hole, so that the strip-shaped hole allows the movable member to move axially towards the inside of the guiding groove.

[0014] According to some embodiments of the present invention, a receiving groove adapted to receive the fastening portion is formed at the end of the fixing member, and the receiving groove communicates with the guiding groove.

[0015] According to some embodiments of the present invention, the subframe assembly further includes: a speed sensor, which is signal-connected to the controller and is used to detect the speed of the vehicle; and / or, a displacement sensor, which is signal-connected to the controller and is used to detect the displacement of the vehicle.

[0016] The vehicle having the above-mentioned subframe assembly according to the present invention will be briefly described below.

[0017] The vehicle according to the present invention includes the subframe assembly described in any one of the above embodiments. Since the vehicle according to the present invention includes the subframe assembly described in any one of the above embodiments, the vehicle according to the present invention can achieve the active, precise and consistent separation of the subframe and the vehicle body longitudinal beam in emergency situations such as collisions, effectively improving the safety and reliability of the vehicle.

[0018] The control method of the vehicle according to the present invention will be briefly described below.

[0019] The vehicle according to the present invention includes the subframe assembly described in any one of the above embodiments. The control method includes: collecting the displacement value and acceleration value when the vehicle collides, and the controller determines whether to separate the vehicle body longitudinal beam from the subframe according to the displacement value and acceleration value; when it is necessary to separate the vehicle body longitudinal beam from the subframe, the controller controls the connecting component to separate the vehicle body longitudinal beam from the subframe.

[0020] During the driving process of the vehicle, the displacement value and acceleration value when the vehicle collides are collected in real time. The displacement value can reflect the position change of the vehicle at the moment of collision, while the acceleration value reflects the speed change rate of the vehicle during the collision process. Through sensors such as displacement sensors and acceleration sensors, the displacement value and acceleration value are accurately obtained and transmitted to the controller.

[0021] After receiving the displacement value and acceleration value, the controller performs analysis and processing according to the pre-set judgment logic and threshold. The controller determines the severity of the collision suffered by the vehicle and whether it is necessary to separate the vehicle body longitudinal beam from the subframe according to the displacement value and acceleration value.

[0022] When the controller determines that it is necessary to separate the vehicle body longitudinal beam from the subframe, it will quickly send a precise control instruction to the connecting component. After receiving the instruction, the connecting component quickly and reliably separates the vehicle body longitudinal beam from the subframe according to the pre-set mechanical action process, avoiding the passive separation method relying on a large collision force in the prior art, making the detachment of the subframe no longer affected by the collision force fluctuation, and improving the consistency and timeliness of the subframe detachment.

[0023] Through the above control method, the vehicle according to the present invention can respond quickly in emergency situations such as collisions, effectively achieve the separation of the subframe and the vehicle body longitudinal beam, thereby improving the safety and reliability of the vehicle in collision situations and providing stronger protection for the lives of the vehicle occupants.

[0024] According to some embodiments of the present invention, the determination conditions for the controller to determine whether to separate the vehicle body longitudinal beam from the subframe based on the displacement value and acceleration value during vehicle collision include: when the displacement value during vehicle collision is greater than or equal to a preset displacement design threshold, and the acceleration value during vehicle collision is greater than or equal to a preset acceleration design threshold, the controller determines that it is necessary to separate the vehicle body longitudinal beam from the subframe.

[0025] The vehicle applying the above control method according to the present invention will be briefly described below.

[0026] The vehicle according to the present invention includes a controller for executing the control method described in any one of the above embodiments. Since the vehicle according to the present invention includes a controller for executing the control method described in any one of the above embodiments, the vehicle applying the above control method according to the present invention significantly improves the safety and reliability during collision by the controller judging and controlling the separation of the subframe and the vehicle body longitudinal beam based on the displacement value and acceleration value.

[0027] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0029] Figure 1 is a schematic structural diagram of a subframe assembly according to an embodiment of the present invention;

[0030] Figure 2 is a schematic structural diagram of a vehicle body longitudinal beam of a subframe assembly according to an embodiment of the present invention;

[0031] Figure 3 is a schematic plan view of a connecting component of a subframe assembly according to an embodiment of the present invention;

[0032] Figure 4 is a schematic structural diagram of a connecting component of a subframe assembly according to an embodiment of the present invention;

[0033] Figure 5 is a schematic plan view of a fastening part and a locking hole of a subframe assembly in a locked state according to an embodiment of the present invention;

[0034] Figure 6 It is a schematic plan view of the fastening part and the locking hole of the subframe assembly according to an embodiment of the present invention in the unlocked state;

[0035] Figure 7 It is a flowchart of a control method for a vehicle according to an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the principle of a control method for a vehicle according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. Subframe assembly;

[0039] 11. Body longitudinal beam, 111. Locking hole;

[0040] 12. Subframe;

[0041] 13. Connecting component, 131. Fixing part, 1311. Receiving groove, 132. Movable part, 1321. Fastening part. Detailed description of the specific embodiment

[0042] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0044] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the related art, when the subframe is subjected to a large collision force, its front mounting point will only be passively separated from the subframe, making it difficult to effectively ensure the consistency of the subframe detachment.

[0046] The following refers to Figures 1 - 6 Describe the subframe assembly 1 according to an embodiment of the present invention.

[0047] As Figures 1 - 4 shown, the subframe assembly 1 according to the present invention is used for a vehicle. The subframe assembly 1 includes a vehicle body longitudinal beam 11 and a subframe 12. The subframe 12 is connected to the vehicle body longitudinal beam 11 through a connecting member 13. The vehicle body longitudinal beam 11 provides an installation basis for the subframe 12 and bears the function of supporting and transmitting forces. The subframe 12 is connected to the vehicle body longitudinal beam 11 through the connecting member 13. The subframe 12 bears important components such as an engine and a transmission and is connected to wheels through a suspension system, playing the roles of supporting, buffering, and transmitting forces.

[0048] The subframe assembly 1 further includes a controller. The controller is in signal connection with the connecting member 13. The controller is configured to control the connecting member 13 to separate the vehicle body longitudinal beam 11 from the subframe 12 when a preset separation condition is reached. A signal connection is established between the controller and the connecting member 13, enabling the controller to obtain the status information of the connecting member 13 in real time and send control instructions to the connecting member 13.

[0049] The separation condition is preset and can be flexibly set according to the actual situation and safety requirements of the vehicle. For example, it can be set that when the vehicle collides, the collision force detected by the collision sensor reaches a certain threshold, or when specific changes occur in parameters such as the acceleration and speed of the vehicle, as the separation condition.

[0050] When the preset separation condition is reached during the vehicle driving process, the controller will immediately send a control signal to the connecting member 13 to control the movement of the connecting member 13 to separate the vehicle body longitudinal beam 11 from the subframe 12. The active control method avoids the passive separation method relying on a large collision force in the prior art, making the detachment of the subframe 12 no longer affected by the fluctuation of the collision force, thus greatly improving the consistency of the subframe 12 detachment.

[0051] Therefore, with the subframe assembly 1 according to the present invention, active separation control between the subframe 12 and the vehicle body longitudinal beam 11 is achieved, effectively alleviating the problem in the related art that it is difficult to ensure the consistency of the subframe 12 detachment, and improving the safety and reliability of the vehicle in the event of a collision.

[0052] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, the connecting member 13 includes a fixing member 131 and a movable member 132. The fixing member 131 is fixedly disposed on one of the vehicle body longitudinal beam 11 and the subframe 12; the movable member 132 is movably disposed on the fixing member 131, and the movable member 132 is in signal connection with the controller to move relative to the fixing member 131 under the control of the controller, so that the movable member 132 is disengaged from or engaged with the other of the vehicle body longitudinal beam 11 and the subframe 12.

[0053] The fixing member 131 can be firmly mounted on the vehicle body longitudinal beam 11 or the subframe 12 by means of welding, bolt connection, etc., providing a stable mounting basis for the movable member 132. The movable member 132 is slidably or rotatably assembled on the fixing member 131, and its movement mode can be linear movement, rotational movement or other forms of mechanical displacement. The movable member 132 is in wired or wireless signal connection with the controller to ensure that control instructions can be transmitted quickly and accurately.

[0054] When the controller determines that a preset separation condition is reached, a driving signal will be sent to the movable member 132. After receiving the signal, the movable member 132 generates mechanical movement through an internal electric, hydraulic or pneumatic actuator, so that its mating structure with the other mounting body (the vehicle body longitudinal beam 11 or the subframe 12) is disengaged, realizing a precisely controllable separation process without relying on the action of an external collision force.

[0055] In the normal working state, the movable member 132 maintains a tight engagement with the vehicle body longitudinal beam 11 and the subframe 12, ensuring that the subframe assembly 1 has sufficient connection strength and stiffness. When separation is required, the movable member 132 can quickly complete the disengagement action under the precise control of the controller, realizing the timely separation of the subframe 12 from the vehicle body longitudinal beam 11, which not only ensures the structural stability of the vehicle during normal driving, but also enables reliable safety separation in an emergency.

[0056] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, a guiding groove extending axially and open at the end is formed in the fixing member 131. The guiding groove provides an accurate moving path for the movable member 132, ensuring that the movable member 132 can slide in a predetermined direction. At least a part of the movable member 132 is slidably disposed in the guiding groove, so that the movable member 132 can move smoothly and accurately under the constraint of the guiding groove.

[0057] The end of the movable part 132 is formed with a fastening part 1321, enabling it to effectively connect and fix to another component among the vehicle body longitudinal beam 11 and the subframe 12. In the normal working state, the fastening part 1321 is tightly combined with the corresponding component, ensuring the reliability and stability of the connection of the subframe assembly 1, enabling the subframe 12 to normally carry important components such as the engine and transmission, and being connected to the wheels through the suspension system to play the roles of support, buffering, and force transmission.

[0058] The movable part 132 can slide along the guide groove. Through the sliding movement, the fastening part 1321 can be disengaged from or engaged with another one among the vehicle body longitudinal beam 11 and the subframe 12. When the preset separation condition is not reached during vehicle driving, the movable part 132 maintains a relatively stable position in the guide groove, and the fastening part 1321 is tightly engaged with the corresponding component, ensuring the firm connection between the subframe 12 and the vehicle body longitudinal beam 11. When the controller determines that the preset separation condition is reached, a driving signal will be sent to the movable part 132. After receiving the signal, the movable part 132 slides along the guide groove, causing the fastening part 1321 to gradually disengage from the mating structure of another mounting body (the vehicle body longitudinal beam 11 or the subframe 12), realizing a separation process that is precisely controllable without relying on the action of external collision forces. The presence of the guide groove provides a clear guide for the movement of the movable part 132, enabling the movable part 132 to accurately reach the predetermined position during the sliding process, ensuring the accuracy and reliability of the disengagement or engagement action between the fastening part 1321 and another component.

[0059] According to some embodiments of the present invention, as Figure 2 、 Figure 5 and Figure 6 shown, a locking hole 111 is formed in another one among the vehicle body longitudinal beam 11 and the subframe 12. The locking hole 111 provides a mating and limiting structure for the fastening part 1321 of the movable part 132. The movable part 132 is rotatably arranged on the fixing part 131, enabling the movable part 132 to perform a rotational movement around a certain axis on the fixing part 131, thereby changing the relative positional relationship between the fastening part 1321 and the locking hole 111. The fastening part 1321 passes through the locking hole 111, realizing the preliminary connection between the movable part 132 and the vehicle body longitudinal beam 11 or the subframe 12.

[0060] The shape structure of the fastening part 1321 is strip-shaped, increasing the contact area and mating precision between the fastening part 1321 and the locking hole 111, and also providing a structural basis for subsequent locking and unlocking actions. The locking hole 111 is configured as a strip-shaped hole adapted to the shape of the fastening part 1321. The shape of the strip-shaped hole matches the fastening part 1321, enabling the fastening part 1321 to smoothly perform relative movement in the strip-shaped hole and realizing different functions in different states.

[0061] The controller can control the rotation of the movable member 132 to switch between the locked state and the unlocked state. In the locked state, the extending direction of the fastening portion 1321 forms an angle with the extending direction of the long strip hole, so that the long strip hole can prevent the movable member 132 from moving axially into the guide groove. Specifically, when the movable member 132 is in the locked state, the fastening portion 1321 abuts against the side wall of the long strip hole. Due to the existence of the angle, the movable member 132 is blocked by the side wall of the long strip hole in the axial direction and cannot move into the guide groove, thereby ensuring the connection stability between the subframe 12 and the vehicle body longitudinal beam 11 and ensuring that the subframe assembly 1 can withstand various loads and forces in the normal working state. In the unlocked state, the extending direction of the fastening portion 1321 is aligned with the extending direction of the long strip hole. At this time, the long strip hole no longer blocks the axial movement of the movable member 132, and allows the movable member 132 to move axially into the guide groove. When the controller determines that the preset separation condition is reached, it will send a rotation control signal to the movable member 132. After receiving the signal, the movable member 132 rotates around its rotation axis, causing the relative position of the fastening portion 1321 and the long strip hole to change, switching from the locked state to the unlocked state. The movable member 132 moves into the guide groove along the guide groove under the action of the axial force, and the fastening portion 1321 gradually disengages from the locking hole 111, thereby realizing the separation of the subframe 12 and the vehicle body longitudinal beam 11.

[0062] Through the rotation of the movable member 132 and the cooperation between the fastening portion 1321 and the long strip hole, the accurately controllable locking and unlocking functions between the subframe 12 and the vehicle body longitudinal beam 11 are realized. In the normal working state, the locked state ensures the connection strength and stability of the subframe assembly 1; while in an emergency, the unlocked state can quickly and reliably realize the separation of the subframe 12 and the vehicle body longitudinal beam 11, effectively improving the safety and reliability of the vehicle in the event of a collision and alleviating the problem that it is difficult to ensure the consistency of the detachment of the subframe 12 in the related art.

[0063] According to some embodiments of the present invention, as Figure 4 shown, a receiving groove 1311 adapted to receive the fastening portion 1321 is formed at the end of the fixing member 131. The receiving groove 1311 provides a receiving space for the fastening portion 1321. The receiving groove 1311 communicates with the guide groove, so that when the movable member 132 slides in the guide groove, the fastening portion 1321 at its end can smoothly enter and exit the receiving groove 1311, ensuring the coherence and stability of the movement of the movable member 132. The shape and size of the receiving groove 1311 match the fastening portion 1321, and can tightly receive the fastening portion 1321.

[0064] When the movable member 132 is in the normal connection state, the fastening portion 1321 is located outside the receiving groove 1311 and cooperates with the locking hole 111 on the vehicle longitudinal beam 11 or the subframe 12 to achieve a firm connection between the subframe 12 and the vehicle longitudinal beam 11. When the movable member 132 needs to move into the guiding groove to achieve separation, the fastening portion 1321 first disengages from the locking hole 111 and then enters the receiving groove 1311. Similarly, when it is necessary to connect the subframe 12 and the vehicle longitudinal beam 11, the movable member 132 slides reversely along the guiding groove, the fastening portion 1321 moves outwards from the receiving groove 1311, and then aligns with and penetrates into the locking hole 111 to complete the connection action.

[0065] According to some embodiments of the present invention, the subframe assembly 1 further includes a speed sensor, which is signal-connected to the controller. The speed sensor is used to detect the speed of the vehicle, so that the speed sensor can transmit the detected vehicle speed information to the controller in real time and accurately. During the driving of the vehicle, the speed sensor continuously works and sends the vehicle speed data to the controller in the form of an electrical signal.

[0066] After receiving the signal from the speed sensor, the controller analyzes and processes the speed data according to the preset program and algorithm. In the separation control strategy of the subframe assembly 1, the vehicle speed is a reference parameter. For example, when the vehicle collides, in combination with the vehicle speed detected by the speed sensor, the controller can more comprehensively evaluate the collision situation and safety status of the vehicle. If the vehicle speed exceeds a certain threshold, the controller may determine that the vehicle is in a relatively severe collision state. At this time, a control signal will be immediately sent to the movable member 132 of the connecting member 13 to control the movement of the movable member 132, so that the subframe 12 is quickly separated from the vehicle longitudinal beam 11 to avoid further damage to the vehicle body caused by the subframe 12 and protect the safety of the vehicle occupants.

[0067] Through the cooperation of the speed sensor and the controller, the subframe assembly 1 can make more accurate and reasonable safety decisions according to the real-time speed situation of the vehicle, further improving the safety and reliability of the vehicle during a collision.

[0068] According to some embodiments of the present invention, the subframe assembly 1 further includes a displacement sensor, which is signal-connected to the controller. The displacement sensor is used to detect the displacement of the vehicle, so that the displacement sensor can transmit the detected vehicle displacement data to the controller in real time.

[0069] After receiving the signal from the displacement sensor, the controller analyzes and processes the displacement data according to the pre-set programs and algorithms. In the control strategy of the subframe assembly 1, the vehicle displacement is the reference parameter. For example, when a vehicle collision occurs, by combining the vehicle displacement changes detected by the displacement sensor, the controller can more comprehensively evaluate the severity of the collision and the vehicle's motion state. If the vehicle displacement changes significantly within a short period of time, the controller determines that the vehicle is in a high-risk collision state. At this time, it will quickly send a control instruction to the movable part 132 of the connecting component 13 to control the movement of the movable part 132, so that the subframe 12 can be separated from the vehicle body longitudinal beam 11 in time, thus effectively preventing the subframe 12 from causing further damage to the vehicle body and ensuring the safety of the passengers in the vehicle.

[0070] Through the coordinated cooperation of the displacement sensor and the controller, the subframe assembly 1 can make more accurate and reasonable safety decisions based on the real-time displacement of the vehicle, further enhancing the safety and reliability of the vehicle in collisions and other dangerous situations.

[0071] The vehicle with the above-mentioned subframe assembly 1 according to the present invention will be briefly described below.

[0072] The vehicle according to the present invention includes the subframe assembly 1 in any one of the above embodiments. Since the vehicle according to the present invention includes the subframe assembly 1 in any one of the above embodiments, the vehicle according to the present invention can achieve the active, accurate and consistent separation of the subframe 12 and the vehicle body longitudinal beam 11 in emergency situations such as collisions, effectively improving the safety and reliability of the vehicle.

[0073] The following is based on Figure 7 and Figure 8 The control method of the vehicle according to the present invention will be briefly described.

[0074] As Figure 7 and Figure 8 shown, the vehicle according to the present invention includes the subframe assembly 1 in any one of the above embodiments. The control method includes: collecting the displacement value and acceleration value when the vehicle collides, and the controller determines whether it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12 according to the displacement value and acceleration value; when it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12, the controller controls the connecting component 13 to separate the vehicle body longitudinal beam 11 from the subframe 12.

[0075] During the vehicle driving process, the displacement value and acceleration value when the vehicle collides are collected in real time. The displacement value can reflect the position change of the vehicle at the moment of collision, while the acceleration value reflects the speed change rate of the vehicle during the collision process. Through sensors such as displacement sensors and acceleration sensors, the displacement value and acceleration value are accurately obtained and transmitted to the controller.

[0076] After the controller receives the displacement value and the acceleration value, it performs analysis and processing based on a pre-set judgment logic and threshold. The controller determines the severity of the collision suffered by the vehicle according to the displacement value and the acceleration value, and whether it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12.

[0077] When the controller determines that it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12, it quickly sends an accurate control instruction to the connecting component 13. After receiving the instruction, the connecting component 13 separates the vehicle body longitudinal beam 11 from the subframe 12 quickly and reliably according to a pre-set mechanical action process, avoiding the passive separation method relying on a large collision force in the prior art, making the detachment of the subframe 12 no longer affected by the collision force fluctuation, and improving the consistency and timeliness of the detachment of the subframe 12.

[0078] Through the above control method, the vehicle according to the present invention can quickly respond in emergency situations such as collisions, effectively realize the separation of the subframe 12 from the vehicle body longitudinal beam 11, thereby improving the safety and reliability of the vehicle in collision situations and providing a more powerful guarantee for the life safety of the vehicle occupants.

[0079] According to some embodiments of the present invention, the judgment conditions for the controller to determine whether it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12 according to the displacement value and the acceleration value during vehicle collision include: when the displacement value during vehicle collision is greater than or equal to a pre-set displacement design threshold, and the acceleration value during vehicle collision is greater than or equal to a pre-set acceleration design threshold, the controller determines that it is necessary to separate the vehicle body longitudinal beam 11 from the subframe 12.

[0080] The displacement design threshold is determined based on in-depth research and analysis of the possible displacement changes of the vehicle in different collision scenarios, comprehensively considering various factors such as the structural strength of the vehicle and the collision speed, and can reflect the critical value of the position change of the vehicle when suffering a certain degree of collision. When the displacement value generated by the actual collision reaches or exceeds the displacement design threshold, it means that the vehicle may have suffered a relatively serious collision and the vehicle body structure may have been damaged to a certain extent. At this time, it is necessary to consider the separation of the subframe 12 from the vehicle body longitudinal beam 11 to avoid further damage.

[0081] Acceleration is a physical quantity that describes how fast an object's velocity changes. During a vehicle collision, the magnitude and direction of the acceleration can reflect the severity of the collision. The pre-set acceleration design threshold represents the limit value of the collision acceleration that the vehicle can withstand. When the acceleration value generated by the collision is greater than or equal to this threshold, it indicates that the impact force on the vehicle is large and may pose a serious threat to the vehicle occupants and equipment. Therefore, it is necessary to separate the subframe 12 from the vehicle body longitudinal beam 11 in a timely manner.

[0082] The controller can make a quick and accurate judgment by real-time monitoring of the displacement value and acceleration value during vehicle collision and comparing them with preset thresholds. Once the above judgment conditions are met, the controller immediately sends a separation instruction to the connecting component 13 to ensure that the subframe 12 and the vehicle body longitudinal beam 11 can be separated in a timely and reliable manner. By the judgment method based on the displacement value and acceleration value, the accuracy and timeliness of the subframe 12 separation decision are improved, effectively enhancing the safety and reliability of the vehicle in the event of a collision, and further alleviating the problem that it is difficult to ensure the consistency of the subframe 12 detachment in the related art.

[0083] The vehicle applying the above control method according to the present invention will be briefly described below.

[0084] The vehicle according to the present invention includes a controller for executing the control method in any one of the above embodiments. Since the vehicle according to the present invention includes a controller for executing the control method in any one of the above embodiments, the vehicle applying the above control method according to the present invention significantly improves the safety and reliability during a collision by the controller judging and controlling the separation of the subframe 12 and the vehicle body longitudinal beam 11 based on the displacement value and acceleration value.

[0085] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0086] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A subframe assembly for a vehicle, characterized in that, Comprising: A vehicle longitudinal beam (11); A subframe (12), the subframe (12) being connected to the vehicle longitudinal beam (11) by a connecting component (13); A controller, the controller being in signal connection with the connecting component (13), the controller being configured to control the connecting component (13) to move when a preset separation condition is reached to separate the vehicle longitudinal beam (11) from the subframe (12).

2. The subframe assembly according to claim 1, wherein, The connecting component (13) comprises: A fixing member (131), the fixing member (131) being fixedly arranged on one of the vehicle longitudinal beam (11) and the subframe (12); A movable member (132), the movable member (132) being movably arranged on the fixing member (131), the movable member (132) being in signal connection with the controller to move relative to the fixing member (131) under the control of the controller, so that the movable member (132) disengages from or engages with the other of the vehicle longitudinal beam (11) and the subframe (12).

3. The subframe assembly according to claim 2, wherein, A guiding groove extending axially and open at the end is formed in the fixing member (131), at least a part of the movable member (132) is slidably arranged in the guiding groove, a fastening portion (1321) is formed at the end of the movable member (132), and the movable member (132) can slide along the guiding groove to disengage from or engage with the other of the vehicle longitudinal beam (11) and the subframe (12).

4. The subframe assembly according to claim 3, characterized in that, A locking hole (111) is formed in the other of the vehicle longitudinal beam (11) and the subframe (12), the movable member (132) is rotatably arranged on the fixing member (131), and the fastening portion (1321) passes through the locking hole (111); Wherein, the shape of the fastening portion (1321) is configured as a long strip, the locking hole (111) is configured as a long strip hole adapted to the shape of the fastening portion (1321), and the controller can control the rotation of the movable member (132) to switch between a locked state and an unlocked state; In the locked state, the extending direction of the fastening portion (1321) forms an angle with the extending direction of the long strip hole, so that the long strip hole prevents the movable member (132) from moving axially towards the inside of the guiding groove; In the unlocked state, the extending direction of the fastening portion (1321) is aligned with the extending direction of the long strip hole, so that the long strip hole allows the movable member (132) to move axially towards the inside of the guiding groove.

5. The subframe assembly according to claim 4, wherein A receiving groove (1311) adapted to receive the fastening portion (1321) is formed at the end of the fixing member (131), and the receiving groove (1311) is communicated with the guiding groove.

6. The subframe assembly according to claim 1, characterized in that, Further comprising: A speed sensor, the speed sensor being in signal connection with the controller, the speed sensor being configured to detect the speed of the vehicle; And / or, a displacement sensor, the displacement sensor being in signal connection with the controller, the displacement sensor being configured to detect the displacement of the vehicle.

7. A vehicle, characterized in that, Comprising the subframe assembly according to any one of claims 1-6.

8. A control method for a vehicle, characterized in that, The vehicle includes the subframe assembly according to any one of claims 1-6, and the control method includes: collecting the displacement value and acceleration value during vehicle collision, and the controller determines whether it is necessary to separate the vehicle body longitudinal beam (11) from the subframe (12) according to the displacement value and acceleration value; When it is necessary to separate the vehicle body longitudinal beam (11) from the subframe (12), the controller controls the connecting component (13) to separate the vehicle body longitudinal beam (11) from the subframe (12).

9. The control method according to claim 8, wherein The judgment conditions for the controller to determine whether it is necessary to separate the vehicle body longitudinal beam (11) from the subframe (12) according to the displacement value and acceleration value during vehicle collision include: When the displacement value during vehicle collision is greater than or equal to the preset displacement design threshold, and the acceleration value during vehicle collision is greater than or equal to the preset acceleration design threshold, the controller determines that it is necessary to separate the vehicle body longitudinal beam (11) from the subframe (12).

10. A vehicle, characterized in that, It includes a controller for executing the control method according to any one of claims 8-9.

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