WO2024114769A1

WO2024114769A1 - Air dam system for vehicle, and vehicle

Info

Publication number: WO2024114769A1
Application number: PCT/CN2023/135664
Authority: WO
Inventors: 魏群雄; 周健操; 王砚红; 黄嘉伟; 熊振风; 郑明敏; 郑端; 袁清鹏; 杨磊; 王香云
Original assignee: 武汉路特斯汽车有限公司
Priority date: 2022-12-01
Filing date: 2023-11-30
Publication date: 2024-06-06
Also published as: CN118124683A

Abstract

An air dam system for a vehicle, and a vehicle. The air dam system comprises: at least one air dam device, which is installed at the bottom of the vehicle and comprises at least one spoiler and a support plate that is close to or is fitted to the bottom of the vehicle, wherein each spoiler has a first end and a second end opposite to each other; the first end of each spoiler is hinged to the support plate corresponding to the air dam device; and each spoiler is configured to be controlled to rotate to a folded state in which the spoiler is close to or is fitted to the support plate, or rotate to an unfolded state in which the spoiler moves downwards away from the support plate. The air dam device can be directly installed on a bottom plate of the vehicle as a whole, and the parts thereof can be separately disassembled or assembled, thereby facilitating production and maintenance.

Description

Air dam system for vehicle and vehicle

Technical Field

The present invention relates to the technical field of vehicles, and in particular to an air dam system for a vehicle and the vehicle.

Background technique

Air dams play an important role in reducing vehicle energy consumption. Air dams can be installed under the front bumper of a car to control the speed of air flow relative to the vehicle, enhance vehicle dynamics and handling and increase the drag coefficient of the vehicle body, or generate downforce on it.

Summary of the invention

An object of the present invention is to provide an air dam system that can be directly and integrally installed on the bottom of a vehicle.

A further object of the present invention is to solve the aerodynamic problems at the front bottom of the vehicle under different driving conditions, improve the handling stability of the vehicle, reduce the driving resistance of the vehicle, reduce the fuel consumption/power consumption of the whole vehicle, and provide users with a better vehicle-machine interaction experience.

In particular, the present invention provides an air dam system for a vehicle, the air dam system comprising at least one air dam device mounted on the bottom of the vehicle, the air dam device comprising at least one spoiler and a support plate close to or attached to the bottom of the vehicle, each spoiler having a first end and a second end opposite to each other,

The first end of each spoiler is hinged to the support plate of the corresponding air dam device, and each spoiler is configured to be controllably rotated to a closed state close to or attached to the support plate and an expanded state downwardly away from the support plate.

By installing at least one air dam device at the bottom of the vehicle, each air dam device includes a spoiler and a support plate, and the spoiler is allowed to rotate relative to the support plate in a controlled manner, not only the aerodynamic performance of the vehicle is improved, but also the support plate can be installed on the bottom plate of the vehicle, thereby achieving the air dam device as a whole being directly installed on the bottom plate of the vehicle. The parts can be removed and installed separately, which is convenient for production and maintenance.

Optionally, each of the air dam devices further comprises a driving mechanism, wherein the driving mechanism comprises:

Motor body;

A driving shaft connected to the motor body, wherein the motor body drives the driving shaft to rotate;

At least one connecting rod assembly, one end of the connecting rod assembly is fixedly connected to the driving shaft, and the other end of the connecting rod assembly is hinged to the spoiler. The connecting rod assembly moves under the drive of the driving shaft and drives the spoiler to rotate relative to the support plate.

By providing a driving mechanism, active driving of the air dam system can be achieved.

Optionally, the connecting rod assembly comprises:

A first connecting rod, fixedly disposed on the driving shaft;

The second connecting rod is hinged to the first connecting rod and the spoiler, so as to drive the spoiler to rotate relative to the supporting plate when the first connecting rod rotates in a controlled manner.

In this embodiment, the connecting rod assembly can realize the rotation of the spoiler only through the first connecting rod and the second connecting rod, the structure is simple, and the first connecting rod can be integrally formed with the drive shaft, further reducing the number of parts.

Optionally, the spoiler includes a first side surface and a second side surface disposed away from the first side surface, the spoiler is disposed to extend in a lateral direction of the vehicle, and is configured such that the first side surface of the spoiler is a windward side when in the deployed state;

The spoiler has a connecting piece extending from the second side surface toward the connecting rod assembly, and the connecting piece is hinged to the supporting plate and the second connecting rod respectively.

Optionally, the air dam system comprises a plurality of air dam devices, and the plurality of air dam devices share a driving device to drive the spoilers of the plurality of air dam devices to rotate.

Optionally, a plurality of pre-assembled fittings are spaced apart on one side of the support plate close to the first end of the spoiler, and each of the pre-assembled fittings is configured to be rotatably connected to the bottom of the vehicle so as to suspend the air dam device to the bottom of the vehicle through the plurality of pre-assembled fittings.

Optionally, the air dam device also includes a cover plate, which covers a side of the support plate away from the spoiler, and a plurality of pre-fixing parts are spaced apart on the side of the cover plate away from the first end of the spoiler, each of the pre-fixing parts is configured to cooperate and be fixed with the bottom of the vehicle after the plurality of pre-assembled parts are pre-assembled to the bottom of the vehicle, so as to pre-fix the support plate at the position to be assembled.

In the prior art, operators usually need to make the air dam device roughly parallel to the bottom of the vehicle, and then install it on the bottom plate from bottom to top. This installation method has a limited installation angle and is extremely difficult to install. Compared with the prior art, in the solution of the present invention, operators can install the air dam device on the bottom of the vehicle from bottom to top in a manner roughly perpendicular to the bottom plate, and then rotate it at a certain angle. The installation angle is greatly increased, thereby reducing the difficulty of installing the aerodynamic device in a limited installation space, and thus achieving the possibility of single-person single-piece operation.

Optionally, there are two air dam devices, which are symmetrically arranged on the left and right sides of the bottom of the vehicle.

Optionally, the number of the air dam devices is at least three, and at least three of the air dam devices are arranged along the lateral direction of the vehicle.

Optionally, the air dam system further comprises a controller connected to the at least one air dam device, wherein the controller is configured to determine an opening and closing state of the spoiler that controls the at least one air dam device according to a vehicle operating condition.

Optionally, the controller is configured to activate a welcome mode when the vehicle is stationary and unlocked, so that the at least one air dam device opens and closes according to preset rules.

Optionally, when there are multiple air dam devices, when all of the multiple air dam devices are in the closed state, it is the first position state; when only the outermost two of the multiple air dam devices are in the open state, it is the second position state; and when all of the multiple air dam devices are in the open state, it is the third position state.

The preset rule is to enable the plurality of air dam devices to periodically and sequentially open the first position state, the second position state and the third position state, and then sequentially close the third position state, the second position state and the first position state.

Optionally, the controller is configured to determine and control the opening and closing states of the multiple air dam devices according to the mode of the air dam system, the active grille activation state of the vehicle and/or the vehicle speed when the vehicle is in a driving condition.

Optionally, the controller is configured to control all of the multiple air dam devices to be opened when the vehicle is in a driving condition, when the air dam system is in an automatic mode, and when the active grille is in an open state;

The controller is configured to control only the outermost two air dam devices of the plurality of air dam devices to be opened when the vehicle is in a driving condition, the air dam system is in an automatic mode, the active grille is in a closed state, and the vehicle speed is greater than a preset speed;

The controller is configured to control all of the multiple air dam devices to close when the vehicle is in a driving condition, the air dam system is in an automatic mode, the active grille is in a closed state, and the vehicle speed is less than or equal to a preset speed.

This embodiment scheme can realize intelligent control of the air dam at the front of the automobile, so that the air dam can be opened according to different driving conditions of the vehicle, thereby improving the system control stability of the vehicle and reducing the fuel consumption and power consumption of the whole vehicle.

In particular, the present invention also provides a vehicle, comprising the air dam system as described above.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It will be appreciated by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

FIG1 shows a schematic structural diagram of a vehicle according to an embodiment of the present invention;

FIG2 shows a schematic structural diagram of an air dam device according to an embodiment of the present invention;

FIG3 shows a schematic exploded view of the air dam device shown in FIG2 ;

FIG4 shows a schematic exploded view of an air dam device according to one embodiment of the present invention;

FIG5 shows a schematic structural diagram of an air dam device according to an embodiment of the present invention;

FIG6 shows a schematic exploded view of an air dam device according to another embodiment of the present invention;

FIG7 is a schematic diagram showing a partial structure of an air dam device according to an embodiment of the present invention;

FIG8 shows a schematic structural diagram of a motor body according to an embodiment of the present invention;

FIG9 is a schematic structural diagram showing a partial structure of a driving mechanism according to an embodiment of the present invention;

FIG10 shows a schematic enlarged view of point B shown in FIG9 ;

FIG11 shows a schematic enlarged view of point A shown in FIG5 ;

FIG12 is a schematic structural diagram showing a partial structure of an air dam device according to an embodiment of the present invention;

FIG13 is a schematic structural diagram showing a partial structure of a vehicle according to an embodiment of the present invention;

FIG14 shows another schematic structural diagram of a portion of the structure of a vehicle according to an embodiment of the present invention;

FIG15 shows a schematic exploded view of a spoiler according to an embodiment of the present invention;

FIG. 16 shows a schematic control flow chart of a controller of an air dam system according to an embodiment of the present invention.

In the figure: 1-bottom plate, 2-air dam system, 3-air dam device, 4-spoiler, 41-first end, 42-second end, 43-first side, 44-second side, 45-connector, 451-plate, 452-fourth through hole, 453-fifth through hole, 46-first body, 47-second body, 48-bonding structure, 5-support plate, 51-allowance hole, 52-carrying part, 521-arc-shaped recess, 531-main pre-assembled part, 532-auxiliary pre-assembled part, 533-hooking part, 6 - driving mechanism, 61- motor body, 611- rotor, 6111- shaft hole, 612- internal spline, 62- driving shaft, 621- shaft body, 6211- axial rib, 6212- external spline, 622- rib, 623- annular structure, 63- connecting rod assembly, 631- first connecting rod, 632- second connecting rod, 6321- reinforcing rib, 6322- second through hole, 7- cover plate, 71- first abutting structure, 72- second abutting structure, 73- convex strip structure, 74- pre-fixing part.

Detailed ways

Fig. 1 shows a schematic structural diagram of a vehicle according to an embodiment of the present invention. As shown in Fig. 1 , the vehicle includes a bumper, a floor panel 1 and an air dam system 2. The air dam system 2 is installed at the floor panel 1. In the embodiment shown in FIG1 , the air dam system 2 includes three air dam devices 3, which are arranged in sequence along the lateral direction of the vehicle (i.e., the width direction of the vehicle). However, the number of the air dam devices 3 is not limited and can be designed as needed, for example, one, two, four or more. Moreover, the size of each air dam device 3 can be designed as needed, and the size of each air dam device 3 does not need to be consistent. However, the structure of each air dam device 3 is consistent.

FIG. 2 shows a schematic structural diagram of an air dam device 3 according to an embodiment of the present invention, in which the spoiler 4 is in a closed state. FIG. 3 shows a schematic exploded view of the air dam device 3 shown in FIG. 2 . As shown in FIG. 2 and FIG. 3 , the air dam device 3 includes a spoiler 4 and a support plate 5 close to or attached to the bottom of the vehicle. In this embodiment, the number of the spoiler 4 is one, the spoiler 4 extends in the lateral direction of the vehicle, and the support plate 5 may also extend in the lateral direction of the vehicle. The spoiler 4 has a first end 41 and a second end 42 opposite to each other. The first end 41 of the spoiler 4 is hinged to the support plate 5 of the air dam device 3, and the spoiler 4 is configured to be controlled to rotate to a closed state close to or attached to the support plate 5 and an unfolded state downwardly away from the support plate 5. In other embodiments, the number of the spoiler 4 may be multiple, and the multiple spoilers 4 are connected in sequence along the lateral direction of the vehicle, and the ends of two adjacent spoilers 4 may be overlapped together to form a continuous, complete spoiler surface with good sealing performance. The following is an example of each air dam device 3 having a spoiler 4.

According to the solution of the embodiment of the present invention, by installing at least one air dam device 3 at the bottom of the vehicle, each air dam device 3 includes a spoiler 4 and a support plate 5, and the spoiler 4 is allowed to rotate relative to the support plate 5 in a controlled manner, not only the aerodynamic performance of the vehicle is improved, but also the support plate 5 can be installed on the bottom plate 1 of the vehicle, so that the air dam device 3 can be directly installed on the bottom plate 1 of the vehicle as a whole, and the parts can be disassembled separately and can be installed separately, which is convenient for production and maintenance.

FIG. 4 shows a schematic exploded view of an air dam device 3 according to an embodiment of the present invention, in which the spoiler 4 is in a closed state. FIG. 5 shows a schematic structural view of an air dam device 3 according to an embodiment of the present invention, in which the spoiler 4 is in an unfolded state. As shown in FIGS. 4 and 5 , the air dam device 3 may further include a driving mechanism 6. The driving mechanism 6 includes a motor body 61, a driving shaft 62 and a connecting rod assembly 63. The driving shaft 62 is connected to the motor body 61, and the motor body 61 drives the driving shaft 62 to rotate. The number of the connecting rod assembly 63 is at least one. One end of each connecting rod assembly 63 is fixedly connected to the driving shaft 62, and the other end of the connecting rod assembly 63 is hinged to the spoiler 4. The connecting rod assembly 63 moves under the drive of the driving shaft 62 and drives the spoiler 4 to rotate relative to the support plate 5. In this embodiment, there are two driving shafts 62, and the two driving shafts 62 are respectively arranged at both ends of the motor body 61, and are synchronously driven by the motor body 61, and the number of the connecting rod assemblies 63 is multiple. However, the number of the driving shaft 62 can also be one, and the number of the connecting rod assembly 63 can also be one. FIG. 6 shows a schematic exploded view of an air dam device 3 according to another embodiment of the present invention. As shown in FIG. 6 , the number of drive shafts 62 The number of connecting rod assemblies 63 is one, so the number of drive shafts 62 can be set to one or two as needed, and the number of connecting rod assemblies 63 can be set to one or more as needed. By setting the driving mechanism 6, active driving of the air dam system 2 can be achieved.

FIG. 7 shows a partial structural schematic diagram of an air dam device 3 according to an embodiment of the present invention. Referring to FIG. 7 , the drive shaft 62 includes a shaft body 621 and a plurality of ribs 622. The shaft body 621 has a plurality of axial ribs 6211 extending in the axial direction of the shaft body 621 and arranged at intervals. The plurality of ribs 622 are arranged between two adjacent axial ribs 6211, and the plurality of ribs 622 form a mesh structure. By arranging a plurality of axial ribs 6211 on the shaft body 621, arranging a plurality of ribs 622 between two adjacent axial ribs 6211, and making the plurality of ribs 622 form a mesh structure, the weight of the drive shaft 62 can be reduced, and the bending and torsional strength of the drive shaft 62 can be improved. As shown in FIG. 7 , a plurality of triangular patterns are formed between two adjacent axial ribs 6211 of the shaft body 621 and a plurality of ribs 622 between two adjacent axial ribs 6211. Moreover, the three intersections in the triangular pattern are all at the axial ribs 6211. The triangular pattern will further improve the bending and torsional strength of the drive shaft 62.

FIG8 shows a schematic structural diagram of a motor body 61 according to an embodiment of the present invention. As shown in FIG8 , the motor body 61 includes a rotor 611, and the rotor 611 is elastically connected to the shaft end of the drive shaft 62. In one embodiment, the rotor 611 is defined with an axial hole 6111, and the axial hole 6111 has an internal spline 612, and the first axial end of the shaft body 621 has an external spline 6212. The internal spline 612 and the external spline 6212 are matched and connected together, thereby realizing the elastic connection between the rotor 611 and the drive shaft 62. The drive shaft 62 and the motor body 61 are easily and reliably connected together through a spline feature that can be quickly disassembled.

FIG. 9 shows a schematic structural diagram of a partial structure of a driving mechanism 6 according to an embodiment of the present invention. FIG. 10 shows a schematic enlarged diagram of B shown in FIG. 9. As shown in FIG. 9 and FIG. 10, the connecting rod assembly 63 includes a first connecting rod 631 and a second connecting rod 632. The first connecting rod 631 is fixedly arranged on the driving shaft 62, for example, it can be integrally formed with the driving shaft 62. The second connecting rod 632 is arranged to be hinged with the first connecting rod 631 and the spoiler 4, so as to drive the spoiler to rotate relative to the support plate when the first connecting rod 631 moves in a controlled manner. The connecting rod assembly 63 can realize the rotation of the spoiler 4 only through the first connecting rod 631 and the second connecting rod 632, and the structure is simple, and the first connecting rod 631 can be integrally formed with the driving shaft 62, further reducing the number of parts. The surface of the second connecting rod 632 has a plurality of reinforcing ribs 6321, and the plurality of reinforcing ribs 6321 together form a mesh structure. In one embodiment, the plurality of reinforcing ribs 6321 form a plurality of reinforcing rib groups, and each reinforcing rib group includes three reinforcing ribs 6321 forming a triangle. By forming the reinforcing rib group into a triangular shape, the strength of the second connecting rod 632 can be greatly enhanced, thereby meeting the strength requirements and power transmission requirements for driving the spoiler 4 to rotate.

The first connecting rod 631 has a first through hole (blocked in FIG. 10 ), and the second connecting rod 632 has a second through hole 6322 and a third through hole (blocked in FIG. 10 ). The first connecting rod 631 and the second connecting rod 632 are aligned with the second through hole 6322 of the second connecting rod 632, so that the first connecting rod 631 and the second connecting rod 632 are hinged together. The third through hole of the second connecting rod 632 is connected to the spoiler 4.

Referring to Fig. 5 and Fig. 10, the spoiler 4 comprises a first side 43 and a second side 44 which is arranged away from the first side 43, and the spoiler 4 is arranged to extend in the lateral direction of the vehicle, and is arranged so that the first side 43 of the spoiler 4 is the windward side when in the deployed state. The second side 44 of the spoiler 4 has a connecting member 45, and the connecting member 45 extends toward the connecting rod assembly 63. The connecting member 45 comprises two plates 451 arranged oppositely and spaced apart, each plate 451 is provided with a fourth through hole 452, and the second connecting rod 632 is hinged between the two plates 451. The fourth through hole 452 on the connecting member 45 is aligned with the third through hole of the second connecting rod 632, so that the second connecting rod 632 is hinged with the spoiler 4. The connecting member 45 also has a fifth through hole 453, and the fifth through hole 453 of the connecting member 45 is aligned with the hole on the support plate 5, so as to be hinged with the support plate 5.

7 , the support plate 5 has a plurality of clearance holes 51, the number of which is consistent with the number of the connecting rod assemblies 63. The function of the clearance holes 51 is to allow the connecting rod assemblies 63 to pass through the support plate 5 and to make way for the rotation of the connecting rod assemblies 63.

FIG11 shows a schematic enlarged view of the A shown in FIG5 . As shown in FIG5 , FIG7 and FIG11 , the support plate 5 has a supporting portion 52 for supporting the drive shaft 62, and the supporting portion 52 has an arc-shaped recess 521. The drive shaft 62 has a plurality of raised annular structures 623, and the annular structures 623 are arranged at the arc-shaped recess 521. The annular structures 623 extend outward from the outer circumference of the drive shaft 62, and the thickness of the annular structures 623 is slightly smaller than the width of the arc-shaped recess 521, so that the arc-shaped recess 521 basically just clamps the annular structure 623, thereby preventing the drive shaft 62 from being displaced or deflected during the rotation process, and playing a limiting role.

FIG. 12 shows a schematic structural diagram of a partial structure of an air dam device 3 according to an embodiment of the present invention. As shown in FIG. 12 , the air dam device 3 further includes a cover plate 7, the inner wall surface of the cover plate 7 near the first connecting rod 631 has a first abutting structure 71 and a second abutting structure 72, and the connecting rod assembly 63 rotates between the first abutting structure 71 and the second abutting structure 72. The cover plate 7 of the driving mechanism 6 covers the support plate 5, and the cover plate 7 and the support plate 5 jointly define a space for accommodating the motor body 61 and the drive shaft 62. The motor body 61 is configured to stop running when the first abutting structure 71 abuts against the connecting rod assembly 63, and the motor body 61 is also configured to stop running when the second abutting structure 72 abuts against the connecting rod assembly 63. The spoiler 4 is configured to rotate to a closed state close to or attached to the support plate 5 when the first abutting structure 71 abuts against the connecting rod assembly 63, and rotate downward to an unfolded state away from the support plate 5 when the second abutting structure 72 abuts against the connecting rod assembly 63. Thus, the driving mechanism 6 can be stopped mechanically without complicated control, thereby achieving the purpose of simplifying the stopping mode of the motor body 61 under the premise of accurately controlling the stopping position of the motor body 61 .

The first abutment structure 71 and the second abutment structure 72 each include at least one inner wall of the cover plate 7 The convex strip structure 73 protrudes toward the direction close to the connecting rod assembly 63. The shape of the convex strip structure 73 is not limited, and can be any structure that can block the connecting rod assembly 63 after it is rotated into place. In the embodiment shown in Figure 12, the first abutment structure 71 and the second abutment structure 72 each include two convex strip structures 73. Of course, the number of the convex strip structures 73 is also not limited and can be set as needed.

Referring to Figures 1 to 7, the support plate 5 also has a plurality of pre-assembled parts, and the plurality of pre-assembled parts are arranged at the edge of the support plate 5 near the first end 41 of the spoiler 4. Figure 13 shows a schematic structural diagram of a partial structure of a vehicle according to an embodiment of the present invention. As shown in Figure 13, each pre-assembled part is configured to be rotatably connected to the bottom plate 1 of the vehicle, so as to suspend the support plate 5 to the bottom plate 1 through a plurality of pre-assembled parts, and then suspend the air dam device 3 to the bottom plate 1. Here, "suspended" means that one side of the support plate 5 is connected to the bottom plate 1, while the other side opposite to the side is not connected to the bottom plate 1. The bottom plate 1 has a plurality of rotation axes. Each pre-assembled part has a hook portion 533, which cooperates with the rotation axis of the corresponding pre-assembled part to hook at the rotation axis and can rotate around the rotation axis.

The bottom plate 1 is provided with a rotation axis mounting portion for mounting the rotation axis. The plurality of pre-assembled parts include at least one main pre-assembled part 531, and the length of the hook part 533 of the main pre-assembled part 531 along the rotation axis direction is consistent with the length of the rotation axis, so that when the hook part 533 of the main pre-assembled part 531 is hooked at the rotation axis, there is no gap between the hook part 533 and the rotation axis mounting portion in the rotation axis direction or the gap length is less than a first threshold. The plurality of pre-assembled parts also include at least one auxiliary pre-assembled part 532, and the length of the hook part 533 of the auxiliary pre-assembled part 532 along the rotation axis direction is less than the length of the rotation axis, so that when the hook part 533 of the auxiliary pre-assembled part 532 is hooked at the rotation axis, the gap length between the hook part 533 and the rotation axis mounting portion in the rotation axis direction is greater than or equal to a second threshold, and the second threshold is greater than the first threshold. In the illustrated embodiment, the number of the main pre-assembled parts 531 is less than the number of the auxiliary pre-assembled parts 532. When the air dam device 3 is assembled to the bottom plate 1 as a whole, one side of the air dam device 3 is first pre-hung on the bottom plate 1 through the pre-assembled parts. First, the main pre-assembled parts 531 are hung on the bottom plate 1, that is, the semicircular fitting surface of the hook part 533 of the main pre-assembled parts 531 fits with the rotation axis of the bottom plate 1. At this time, the hook parts 533 of other auxiliary pre-assembled parts 532 are in a free state. Then, other auxiliary pre-assembled parts 532 are hung on the bottom plate 1, that is, the semicircular fitting surfaces of the hook parts 533 of other auxiliary pre-assembled parts 532 fit with other rotation axes of the bottom plate 1. Thus, one side of the air dam device 3 is pre-hung on the bottom plate 1, which can solve the problem that when the operator installs the large-sized air dam device 3 from bottom to top, it is impossible to operate alone, and at the same time, it solves the problem of pre-assembly in a limited space.

Referring to FIG. 4 and FIG. 13 , a plurality of pre-fixing members 74 are also provided on the side of the cover plate 7 away from the pre-assembled parts. Each pre-fixing member 74 is configured to cooperate and fix with the bottom plate 1 after the plurality of pre-assembled parts are pre-assembled to the bottom plate 1, so as to pre-fix the support plate at the position to be assembled. Each pre-fixing member 74 is an integrated elastic buckle. When the air dam device 3 is assembled to the bottom plate 1 as a whole, after one side of the air dam device 3 is pre-assembled to the bottom plate 1 by the pre-assembled parts, the other side of the air dam device 3 is fixed by the pre-fixing member 74. The air dam device 3 is pre-fixed at the bottom plate 1, thereby achieving the purpose of pre-fixing the entire air dam device 3 at the bottom plate 1. Thus, the purpose of an operator installing a large-sized air dam device 3 in a limited workpiece from bottom to top can be fully achieved.

FIG14 shows another schematic structural diagram of a partial structure of a vehicle according to an embodiment of the present invention. In the embodiments shown in FIG1 , FIG13 and FIG14 , the air dam system 2 includes three air dam devices 3 connected in sequence, namely a left air dam device 3, a middle air dam device 3 and a right air dam device 3, and the left air dam device 3, the middle air dam device 3 and the right air dam device 3 each have a spoiler 4. Each spoiler 4 has an overlapping portion that overlaps with another adjacent spoiler 4, and the overlapping portion is located at the end of the spoiler 4. The structures of the overlapping portions of two adjacent spoilers 4 cooperate with each other so that the windward surfaces of the overlapping multiple spoilers 4 form a continuous and smooth surface at the overlapping portion. The spoiler 4 realizes an integrated front spoiler design by overlapping.

FIG. 15 shows a schematic exploded view of a spoiler 4 according to an embodiment of the present invention. As shown in FIG. 15 , each spoiler 4 includes a first body 46 and a second body 47, the second body 47 is bonded to the first body 46, and the surface of the second body 47 away from the bonding surface bonded to the first body 46 is the windward surface. The first body 46 and the second body 47 are both plastic parts, and the hardness of the second body 47 is less than the hardness of the first body 46. The area of the second body 47 is greater than the area of the first body 46, and the second body 47 is arranged to cover the entire first body 46. Each spoiler 4 also includes a bonding structure 48, which is arranged between the first body 46 and the second body 47 for bonding the first body 46 and the second body 47. The structural design of the spoiler 4 realizes the maximum spoiler area while increasing the downforce of the air dam system 2, thereby ensuring the vehicle's passability. The Z-down boundary of the vehicle's passability is hard glue, and the designed soft glue is higher in the Z-direction length than the hard glue, for example, it can be 40 mm higher, ensuring the maximum spoiler area and protecting the spoiler 4. The outermost soft rubber surface of the second body 47 resists the impact of foreign objects such as stones, thereby protecting the air dam device 3.

According to the solution of the embodiment of the present invention, it is possible to realize the opening and closing of the active air dam within 4 seconds under the condition of a 67N load at the wind pressure center and the center stiffness requirement of 200N.

In one embodiment, the air dam system 2 further includes a controller, which is connected to each air dam device 3. Figure 16 shows a schematic control flow chart of the controller of the air dam system 2 according to an embodiment of the present invention. As shown in Figure 16, the controller is configured to determine the opening and closing state of the spoiler 4 that controls at least one air dam device 3 according to the vehicle operating condition. In a specific embodiment, the controller is configured to turn on the welcome mode when the vehicle is in a stationary and unlocked state, so that the air dam device 3 opens and closes according to preset rules. In this embodiment, the number of air dam devices 3 is multiple, and all of the multiple air dam devices 3 are in a closed state as a first position state, and the first position is marked as P0. Only the outermost two air dam devices 3 of the multiple air dam devices 3 are in an open state as a second position state, and the second position is marked as P1. All of the multiple air dam devices 3 are in an open state. The state is the third position state, and the third position is marked as P2. The preset rule is to enable multiple air dam devices 3 to periodically open the first position state, the second position state and the third position state in sequence, and then close the third position state, the second position state and the first position state in sequence. The welcome mode can provide users with an ultimate vehicle-machine interaction experience. In one embodiment, the controller is configured to determine whether the vehicle is unlocked after the vehicle enters the welcome mode. If the vehicle is unlocked, the air dam device 3 is opened and closed according to the preset rules, otherwise it returns to the step of determining whether the vehicle is stationary.

In one embodiment, the controller is configured to control the opening and closing states of the plurality of air dam devices 3 according to the mode of the air dam system 2, the active grille activation state of the vehicle and/or the vehicle speed when the vehicle is in a driving condition. It can be determined according to the use requirements whether to control the opening and closing states of any one or more air dam devices 3 according to the mode of the air dam system 2, the active grille activation state of the vehicle and the vehicle speed.

In one embodiment, the controller is configured to control all the air dam devices 3 in the multiple air dam devices 3 to be opened when the vehicle is in a driving condition, when the air dam system 2 is in an automatic mode and the active grille is in an open state, that is, the air dam system 2 is in a P2 state. The controller is configured to control only the outermost two air dam devices 3 in the multiple air dam devices 3 to be opened when the vehicle is in a driving condition, when the air dam system 2 is in an automatic mode, when the active grille is in a closed state and the vehicle speed is greater than a preset speed, that is, the air dam system 2 is in a P1 state. And the controller is configured to control all the air dam devices 3 in the multiple air dam devices 3 to be closed when the vehicle is in a driving condition, when the air dam system 2 is in an automatic mode, when the active grille is in a closed state and the vehicle speed is less than or equal to a preset speed, that is, at this time, the air dam system 2 is in a P0 state. Among them, the preset speed can be, for example, 100km/h, 110km/h or 120km/h. In this way, the intelligent control of the front air dam of the car can be realized, so that the air dam can be opened according to different driving conditions of the vehicle, which improves the system control stability of the vehicle and reduces the fuel consumption and power consumption of the whole vehicle.

In particular, the present invention also provides a vehicle, which includes the aforementioned air dam system 2 .

At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications of the common principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

An air dam system for a vehicle, wherein the air dam system includes at least one air dam device installed on the bottom of the vehicle, the air dam device includes at least one spoiler and a support plate close to or attached to the bottom of the vehicle, each of the spoilers has a first end and a second end opposite to each other, the first end of each spoiler is hinged to the support plate of the corresponding air dam device, and each spoiler is configured to be controllably rotated to a closed state close to or attached to the support plate and an expanded state downwardly away from the support plate.
The air dam system according to claim 1, wherein each of the air dam devices further comprises a drive mechanism, the drive mechanism comprising:

Motor body;

A driving shaft connected to the motor body, wherein the motor body drives the driving shaft to rotate;

At least one connecting rod assembly, one end of the connecting rod assembly is fixedly connected to the driving shaft, and the other end of the connecting rod assembly is hinged to the spoiler. The connecting rod assembly moves under the drive of the driving shaft and drives the spoiler to rotate relative to the support plate.
The air dam system of claim 2, wherein the linkage assembly comprises:

A first connecting rod, fixedly disposed on the driving shaft;

The second connecting rod is hinged to the first connecting rod and the spoiler, so as to drive the spoiler to rotate relative to the supporting plate when the first connecting rod rotates in a controlled manner.
The air dam system according to claim 3, wherein the spoiler comprises a first side surface and a second side surface disposed away from the first side surface, the spoiler is disposed to extend in a lateral direction of the vehicle, and is configured such that the first side surface of the spoiler is a windward side when in the deployed state;

The spoiler has a connecting piece extending from the second side surface toward the connecting rod assembly, and the connecting piece is hinged to the supporting plate and the second connecting rod respectively.
The air dam system according to claim 1, wherein the air dam system comprises a plurality of air dam devices, and the plurality of air dam devices share a driving device to drive the spoilers of the plurality of air dam devices to rotate.
The air dam system according to any one of claims 1 to 5, wherein a plurality of pre-assembled fittings are spaced apart on one side of the support plate close to the first end of the spoiler, each of the pre-assembled fittings being configured to be rotatably connected to the bottom of the vehicle so as to suspend the air dam device to the bottom of the vehicle through the plurality of pre-assembled fittings.
The air dam system according to claim 6, wherein the air dam device further comprises a cover plate, the cover plate covers a side of the support plate away from the spoiler, a side of the cover plate away from the first end of the spoiler is provided with a plurality of pre-fixing members spaced apart, each of the pre-fixing members The supporting plate is configured to be fixed to the bottom of the vehicle after the plurality of pre-installed parts are pre-assembled thereto, so as to pre-fix the supporting plate at the bottom of the vehicle.
The air dam system according to any one of claims 1-4 and 7, wherein the number of the air dam devices is two, and the two air dam devices are symmetrically arranged on the left and right sides of the bottom of the vehicle.
The air dam system according to any one of claims 1-4 and 7, wherein the number of the air dam devices is at least three, and the at least three air dam devices are arranged along the lateral direction of the vehicle.
The air dam system according to any one of claims 1-5 and 7, further comprising a controller connected to the at least one air dam device, the controller being configured to determine an opening and closing state of the spoiler that controls the at least one air dam device according to a vehicle operating condition.
The air dam system according to claim 10, wherein the controller is configured to activate a welcome mode when the vehicle is stationary and unlocked, so that the at least one air dam device is opened and closed according to a preset rule.
The air dam system according to claim 11, wherein when there are multiple air dam devices, all of the multiple air dam devices are in the closed state as a first position state, only the outermost two of the multiple air dam devices are in the open state as a second position state, and all of the multiple air dam devices are in the open state as a third position state;

The preset rule is to enable the plurality of air dam devices to periodically and sequentially open the first position state, the second position state and the third position state, and then sequentially close the third position state, the second position state and the first position state.
The air dam system according to claim 10, wherein the controller is configured to determine and control the opening and closing states of the plurality of air dam devices according to a mode of the air dam system, an active grille activation state of the vehicle and/or a vehicle speed of the vehicle when the vehicle is in a driving condition.
The air dam system according to claim 13, wherein the controller is configured to control all of the plurality of air dam devices to be opened when the vehicle is in a driving condition, when the air dam system is in an automatic mode and the active grille is in an open state;

The controller is configured to control only the outermost two air dam devices of the plurality of air dam devices to be opened when the vehicle is in a driving condition, the air dam system is in an automatic mode, the active grille is in a closed state, and the vehicle speed is greater than a preset speed;

The controller is configured to control all of the multiple air dam devices to close when the vehicle is in a driving condition, the air dam system is in an automatic mode, the active grille is in a closed state, and the vehicle speed is less than or equal to a preset speed.
A vehicle comprising the air dam system according to any one of claims 1-14.