A hybrid vehicle engine compartment rear assembly

Abstract

A hybrid vehicle engine compartment rear assembly, belonging to the field of automotive engine compartment technology, includes a front baffle assembly and A-pillar vertical plate assemblies on both sides. A crossbeam assembly is symmetrically arranged on the front baffle assembly with the vehicle centerline as the axis of symmetry. A battery pack assembly is installed between the two crossbeam assemblies. The A-pillar vertical plate assemblies are connected to the front longitudinal beam assembly through the crossbeam assemblies. The advantages of this invention are that the engine compartment rear assembly has a simple structure and manufacturing process, strong versatility, strong safety and collision resistance, and can comprehensively ensure battery safety and occupant safety.

Description

Technical Field

[0001] This invention relates to the field of automotive engine compartment technology, and more particularly to a rear assembly of a hybrid vehicle engine compartment. Background Technology

[0002] With the development of automotive technology, consumers' demands for NVH (noise, vibration, and harshness) and safety performance in automobiles are increasing. Vehicle safety has become a key factor for consumers when purchasing a vehicle. When a car is involved in a frontal collision, the rear structure of the engine compartment assembly absorbs a certain amount of impact energy while slowing down the movement of the occupants. At the same time, the rear structure of the engine compartment assembly needs to be sufficiently robust, resistant to deformation, and capable of transmitting and dissipating collision forces. It is crucial to ensure that there is sufficient survival space in the passenger compartment during a collision.

[0003] Some PHEV hybrid vehicles in the industry have their rear engine compartment structure modified from traditional gasoline vehicles. The layout of their three electric components (battery, motor, and electronic control system) needs to make way for the original gasoline vehicle platform, which can lead to some structural inconsistencies. After a collision, the battery pack may be invaded by hard objects, resulting in fire and poor safety. In addition, the structure of the hybrid vehicle body modified from a gasoline vehicle has a significant limitation on the battery range. PHEV hybrid vehicles are about 100kg heavier than gasoline vehicles, which poses a great challenge to collision safety.

[0004] In existing technologies, most modifications involve structural improvements to the front of the engine compartment to enhance collision performance. For example, patent CN115447672A discloses an automotive engine compartment structure, including wheel arch assemblies, crossbeam assemblies, and longitudinal beam assemblies. The wheel arch assemblies include a left front wheel arch assembly and a right front wheel arch assembly, and the longitudinal beam assemblies include a left front longitudinal beam assembly and a right front longitudinal beam assembly. The left and right front longitudinal beam assemblies are arranged side by side and located on both sides of the vehicle frame's central axis F. The bottom of the left front wheel arch assembly is fixedly connected to the left front longitudinal beam assembly, and the bottom of the right front wheel arch assembly is fixedly connected to the right front longitudinal beam assembly. One end of the crossbeam assembly is fixedly connected to the left front wheel arch assembly, and the other end is fixedly connected to the right front wheel arch assembly. The area where the crossbeam assembly, wheel arch assembly, and longitudinal beam assembly connect forms the engine compartment. The engine compartment structure only modifies the front structure of the engine compartment, without modifying the rear structure to improve the safety of battery pack installation in hybrid vehicles, and does not provide any technical insights. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a hybrid vehicle engine compartment rear assembly that features strong safety and collision resistance, simple structure and manufacturing process, and high versatility.

[0006] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is as follows: The rear assembly of the engine compartment of the hybrid vehicle includes a front baffle assembly and A-pillar vertical plate assemblies arranged on both sides thereof. A cross beam assembly is symmetrically arranged on the front baffle assembly with the vehicle body center line as the symmetry axis. A battery pack assembly is installed between the two cross beam assemblies. The A-pillar vertical plate assembly is connected to the front longitudinal beam assembly through the cross beam assembly.

[0007] The cross beam assembly includes a connecting cross beam welded to the front baffle assembly in the vehicle body width direction, a connecting longitudinal beam perpendicularly welded thereto, and a longitudinal beam connecting plate.

[0008] The outer end of the connecting cross beam is welded to the A-pillar vertical plate assembly.

[0009] The front baffle assembly, the connecting cross beam, and the A-pillar vertical plate assembly are welded together to form a cavity structure.

[0010] The connecting cross beam is provided as a stamping part with a "channel" cross-section. The two sides of the connecting cross beam are welded to the front baffle assembly through a flanging structure, and one end of the connecting cross beam is welded to the A-pillar vertical plate assembly through a reinforced flanging.

[0011] The connecting longitudinal beam is lap-welded between the front baffle assembly and the connecting cross beam, and the end of the connecting longitudinal beam away from the connecting cross beam is fixedly connected to the front longitudinal beam assembly.

[0012] The connecting longitudinal beam is provided as an L-shaped stamping part, and the cross-section of the connecting longitudinal beam is provided as a "channel" shape.

[0013] The front baffle assembly is fixedly connected to the front floor assembly. The longitudinal beam connecting plate is lap-welded to the connecting cross beam, the front baffle assembly, and the front floor assembly; the longitudinal beam connecting plate is provided as a stamping part, and the longitudinal beam connecting plate includes a connecting section lap-welded to the connecting cross beam, and the width of the connecting section gradually decreases along the direction away from the connecting cross beam.

[0014] The two sides of the front part of the battery pack assembly are respectively fixedly connected to the two longitudinal beam connecting plates.

[0015] The two cross beam assemblies are connected by a middle channel connecting pipe beam.

[0016] The beneficial effects of the present invention are:

[0017] 1. This invention features a crossbeam assembly symmetrically arranged on the front fender assembly with the vehicle centerline as the axis of symmetry. The A-pillar vertical plate assemblies on both sides of the front fender assembly are connected to the front longitudinal beam assembly via the crossbeam assemblies. The battery pack assembly is installed between the two crossbeam assemblies. On the one hand, this enables longitudinal force transmission and energy absorption of the vehicle body, improving the transmission of collision energy. It can effectively guide the collision force transmitted from a frontal collision to the A-pillar vertical plate assembly to ensure battery safety and occupant safety in all aspects. On the other hand, it improves the structural strength and stability of the battery pack mounting point, suppresses collision bending, and protects the passenger compartment from deformation.

[0018] 2. The rear engine compartment assembly provided by the present invention is composed of stamped parts and connected by welding and bolts. The stamped parts have a simple structure, shorten the manufacturing cycle, and have a simple installation process. It can be used by both fuel vehicles and PHEV hybrid vehicles, thus reducing the vehicle frame development cost. Attached Figure Description

[0019] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0020] Figure 1 This is a schematic diagram of the rear assembly of the hybrid vehicle engine compartment according to the present invention;

[0021] Figure 2 for Figure 1 AA-direction cross-section diagram;

[0022] Figure 3 This is a schematic diagram of the front baffle assembly in this invention;

[0023] Figure 4 This is a schematic diagram of the connecting beam structure in this invention;

[0024] Figure 5 This is a schematic diagram of the connecting longitudinal beam in this invention;

[0025] Figure 6 This is a schematic diagram of the longitudinal beam connecting plate in this invention;

[0026] Figure 7 This is a schematic diagram of the structure of the central channel connecting pipe beam in this invention;

[0027] Figure 8 This is a schematic diagram of the structure of the central channel connecting plate in this invention;

[0028] The markings in the above figures are as follows: 1. Front baffle assembly, 2. A-pillar vertical plate assembly, 3. Connecting crossbeam, 31. Flanged structure, 32. Reinforced flange, 4. Connecting longitudinal beam, 5. Longitudinal beam connecting plate, 51. Connecting section, 6. Front longitudinal beam assembly, 7. Central channel connecting tube beam, 8. Fixed crossbeam, 9. Central channel connecting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In existing technologies, the rear structure of the engine compartment in some hybrid vehicles is achieved by modifying traditional gasoline vehicles. This requires the battery, motor, and electronic control system (battery, motor, and electronic control system) to accommodate the existing gasoline vehicle platform, leading to structural inconsistencies. In the event of a collision, the battery pack may be intruded by hard objects, potentially causing fires and compromising safety. Furthermore, modifying the body structure of a gasoline vehicle to create a hybrid significantly limits battery range. Hybrid vehicles are approximately 100kg heavier than gasoline vehicles, posing a significant challenge to collision safety. To address these technical issues, current solutions primarily focus on structural modifications to the front of the engine compartment to improve collision performance, without addressing the rear structure to enhance the safety of the battery pack installation in hybrid models.

[0033] Therefore, the present invention addresses the above-mentioned technical problems existing in the prior art, such as... Figure 1As shown, this invention provides a rear engine compartment assembly for a hybrid vehicle, symmetrically arranged about the vehicle's centerline. It includes a front fender assembly 1 and A-pillar vertical plate assemblies 2 on both sides. A crossbeam assembly is symmetrically arranged on the front fender assembly 1 about the vehicle's centerline. The components constituting the crossbeam assembly are symmetrically arranged, and a battery pack assembly is installed between the two crossbeam assemblies. The A-pillar vertical plate assembly 2 is connected to the front longitudinal beam assembly 6 via the crossbeam assembly. This crossbeam assembly has the following advantages: firstly, it enables longitudinal force transmission and energy absorption within the vehicle body, improving the transfer of collision energy and effectively guiding the collision force from a frontal collision to the A-pillar vertical plate to ensure battery and occupant safety from all angles; secondly, it improves the structural strength and stability of the battery pack mounting point, suppressing collision bending and protecting the passenger compartment from deformation.

[0034] Specifically, such as Figure 1 As shown, the cross beam assembly includes a connecting crossbeam 3 welded to the front fender assembly 1 along the width direction of the vehicle body, and a connecting longitudinal beam 4 and a longitudinal beam connecting plate 5 welded perpendicularly to it. The connecting longitudinal beam 4 and the longitudinal beam connecting plate 5 are arranged opposite to each other, so that the connecting crossbeam 3, the connecting longitudinal beam 4 and the longitudinal beam connecting plate 5 form a cross structure. Moreover, the outer end of the connecting crossbeam 3 is welded to the A-pillar vertical plate assembly 2, which can effectively guide the collision force transmitted from the front collision to the A-pillar vertical plate assembly 2 to ensure the safety of the battery and the safety of the occupants in all directions. In addition, this structure is more robust and the connection is smoother. In particular, the longitudinal beam connecting plate 5 has no bends or abrupt changes, which suppresses collision bending and protects the integrity of the passenger compartment from deformation.

[0035] Specifically, such as Figure 2 As shown, the front baffle assembly 1, the connecting crossbeam 3, and the A-pillar vertical plate assembly 2 are welded together to form a cavity structure. The front baffle assembly 1, the connecting crossbeam 3, and the A-pillar vertical plate assembly 2 are further fixed by spot welding. Since the connecting crossbeam 3 is welded to the connecting longitudinal beam 4, and the connecting longitudinal beam 4 is connected to the front longitudinal beam assembly 6, when a collision occurs at the front of the vehicle, the collision force can be guided and transmitted to the A-pillar vertical plate assembly 2 through the front baffle assembly 1 and the connecting crossbeam 3 in sequence, or through the front longitudinal beam assembly 6, the connecting longitudinal beam 4, and the connecting crossbeam 3 in sequence. This provides multiple force transmission paths, realizes longitudinal force transmission and energy absorption of the vehicle body, improves the transmission of collision energy, and can effectively guide the collision force transmitted from the front collision to the A-pillar vertical plate through multiple force transmission paths to ensure battery safety and occupant safety in all aspects.

[0036] Specifically, such as Figure 4As shown, the connecting cross beam 3 is set as a stamping part with a "C" - shaped cross - section, which is made by stamping with a steel plate stamping die. The stamping part has a simple structure, a short manufacturing cycle, and a low manufacturing cost. The two sides of the connecting cross beam 3 are lap - welded to the front baffle assembly 1 through the flanging structure 31. One end of the connecting cross beam 3 is welded to the A - pillar vertical plate assembly 2 through the reinforcing flanging 32. The reinforcing flanging 32 is in conformal lap with the A - pillar vertical plate assembly 2, and a plurality of longitudinal ribs are arranged at intervals along the length direction of the reinforcing flanging 32, which improves the connection strength and stability between the connecting cross beam 3 and the A - pillar vertical plate assembly 2, and can ensure that the collision force is effectively transmitted to the A - pillar vertical plate assembly 2.

[0037] Specifically, as Figure 5 shown, the connecting longitudinal beam 4 is lap - welded between the front baffle assembly 1 and the connecting cross beam 3, and the end of the connecting longitudinal beam 4 far from the connecting cross beam 3 is fixedly connected to the front longitudinal beam assembly 6 by welding. The connecting longitudinal beam 4 is set as an L - shaped stamping part, which is made by stamping with a steel plate stamping die. The stamping part has a simple structure, a short manufacturing cycle, and a low manufacturing cost. The cross - section of the connecting longitudinal beam 4 is set as a "C" - shaped. Moreover, the welding connection between the front baffle assembly 1, the connecting longitudinal beam 4 and the front longitudinal beam assembly 6 also encloses a cavity structure, forming another force - transmission path, so that the front collision force can be effectively transmitted to the A - pillar vertical plate assembly 2 through the front longitudinal beam assembly 6.

[0038] Moreover, as Figure 1 shown, a fixed cross beam 8 is fixedly welded on the front baffle assembly 1 along the vehicle body width direction. The fixed cross beam 8 and the front baffle assembly 1 enclose a cavity structure. The two ends of the fixed cross beam 8 are welded to the two front longitudinal beam assemblies 6, which not only ensures the welding strength and stability of the front longitudinal beam assembly 6, but also provides a force - transmission path, so that the front collision force is effectively transmitted to the A - pillar vertical plate assembly 2 through the fixed cross beam 8, the front longitudinal beam assembly 6, the connecting longitudinal beam 4, and the connecting cross beam 3 in sequence.

[0039] Specifically, as Figure 1 and Figure 6 shown, the front baffle assembly 1 is fixedly connected to the front floor assembly by welding. The longitudinal beam connecting plate 5 is lap - welded to the connecting cross beam 3, the front baffle assembly 1 and the front floor assembly, and is fixedly connected to the connecting cross beam 3 by welding. The longitudinal beam connecting plate 5 is set as a stamping part, which is made by stamping with a steel plate stamping die. The stamping part has a simple structure, a short manufacturing cycle, and a low manufacturing cost. The longitudinal beam connecting plate 5 includes a connecting section 51 lap - welded to the connecting cross beam 3, and the width of the connecting section 51 gradually decreases along the direction away from the connecting cross beam 3, increasing the lap - welding contact area with the connecting cross beam 3 and ensuring the connection strength and stability with the connecting cross beam 3. And the longitudinal beam connecting plate 5 is perpendicular to the connecting cross beam 3, without turning or sudden change, suppressing collision bending and protecting the integrity of the occupant compartment without deformation.

[0040] Specifically, the front two sides of the battery pack assembly are fixedly connected to the two longitudinal beam connecting plates 5 by bolts, and the middle and rear two sides of the battery pack assembly are fixedly connected to the front floor assembly, which improves the structural strength and stability of the battery pack assembly mounting point.

[0041] Specifically, such as Figure 1 and Figure 7 As shown, the two cross beam assemblies (two connecting cross beams 3) are connected by bolts through the central channel connecting pipe beam 7, which improves the rigidity of the body-in-white. At the same time, the central channel connecting pipe beam 7 is compact and occupies little space, providing more space for the arrangement of accessories such as battery pack, exhaust pipe, and water pipe.

[0042] In addition, such as Figure 1 and Figure 8 As shown, the connecting beam 3 has a central channel connecting plate 9 welded to one end away from the A-pillar vertical plate assembly 2. One end of the central channel connecting plate 9 is connected to the connecting beam 3 through multiple flanges. The two central channel connecting plates 9 are connected to the central channel, which improves the structural strength of the central channel installation point and the stability of the central channel installation.

[0043] This invention, through the design of a crossbeam assembly, provides three force transmission paths for frontal collision forces: Path 1: The collision force is sequentially transmitted to the A-pillar vertical plate assembly 2 via the front baffle assembly 1, connecting crossbeam 3, and then guided through the front longitudinal beam assembly 6, connecting longitudinal beam 4, and connecting crossbeam 3; Path 3: The collision force is sequentially transmitted to the A-pillar vertical plate assembly 2 via the fixed crossbeam 8, front longitudinal beam assembly 6, connecting longitudinal beam 4, and connecting crossbeam 3. These three force transmission paths comprehensively ensure battery safety and occupant safety, improving the driving safety of hybrid vehicles.

[0044] In addition, the rear engine compartment assembly provided by the present invention is composed of stamped parts and connected by welding and bolting. The stamped parts have a simple structure, shorten the manufacturing cycle, and have a simple installation process. It can be used by both fuel vehicles and PHEV hybrid vehicles, thus reducing the vehicle frame development cost.

[0045] In summary, the hybrid vehicle engine compartment rear assembly designed in this invention has a simple structure and process, strong versatility, and strong safety and collision resistance, which can comprehensively ensure battery safety and passenger safety.

[0046] The above description is merely an illustration of some principles of the present invention. This specification is not intended to limit the present invention to the specific structures and applicable scope shown. Therefore, all possible modifications and equivalents that may be used fall within the scope of the patent application of this invention.

Claims

1. A rear engine compartment assembly for a hybrid vehicle, characterized in that, It includes a front baffle assembly and A-pillar vertical plate assemblies arranged on both sides thereof. A cross beam assembly is symmetrically arranged on the front baffle assembly with the vehicle body center line as the symmetry axis. A battery pack assembly is installed between the two cross beam assemblies. The A-pillar vertical plate assembly is connected to the front longitudinal beam assembly through the cross beam assembly; The cross beam assembly includes a connecting cross beam welded on the front baffle assembly along the vehicle body width direction, a connecting longitudinal beam perpendicularly welded thereto, and a longitudinal beam connecting plate; The front baffle assembly, the connecting cross beam, and the A-pillar vertical plate assembly are welded together to enclose a cavity structure; The connecting longitudinal beam is lap-welded between the front baffle assembly and the connecting cross beam, and the end of the connecting longitudinal beam away from the connecting cross beam is fixedly connected to the front longitudinal beam assembly; A fixed cross beam is welded and fixed on the front baffle assembly along the vehicle body width direction. The fixed cross beam and the front baffle assembly enclose a cavity structure, and both ends of the fixed cross beam are welded to the two front longitudinal beam assemblies.

2. The hybrid vehicle engine compartment rear assembly according to claim 1, characterized in that: The outer end of the connecting cross beam is welded to the A-pillar vertical plate assembly.

3. The hybrid vehicle engine compartment rear assembly according to claim 2, characterized in that: The connecting cross beam is set as a stamping part with a "U" - shaped cross section. Both sides of the connecting cross beam are welded to the front baffle assembly through a flanging structure, and one end of the connecting cross beam is welded to the A-pillar vertical plate assembly through a reinforced flanging.

4. The hybrid vehicle engine compartment rear assembly according to claim 1, characterized in that: The connecting longitudinal beam is set as an L-shaped stamping part, and the cross section of the connecting longitudinal beam is set as a "U" - shaped cross section.

5. The hybrid vehicle engine compartment rear assembly according to claim 1, characterized in that: The front baffle assembly is fixedly connected to the front floor assembly. The longitudinal beam connecting plate is lap-welded on the connecting cross beam, the front baffle assembly, and the front floor assembly; the longitudinal beam connecting plate is set as a stamping part, and the longitudinal beam connecting plate includes a connecting section lap-welded on the connecting cross beam, and the width of the connecting section gradually decreases along the direction away from the connecting cross beam.

6. The hybrid vehicle engine compartment rear assembly according to claim 5, characterized in that: The front sides of both sides of the battery pack assembly are respectively fixedly connected to the two longitudinal beam connecting plates.

7. The rear engine compartment assembly of a hybrid vehicle according to claim 1, characterized in that: The two cross beam assemblies are connected by a middle channel connecting pipe beam.

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