Hydraulic suspension assembly of hybrid vehicle and vehicle

Abstract

The hydraulic suspension assembly comprises a shell, a rubber main spring and a first leather cup, the rubber main spring is arranged in the shell, a first cavity is formed between the rubber main spring and the inner wall of the shell in the first direction, and the first direction is perpendicular to the horizontal plane direction of the hybrid vehicle; a first damping chamber is arranged between the first leather cup and the rubber main spring in the second direction, the second direction is the advancing direction of the hybrid power vehicle, the first damping chamber is filled with damping liquid, a first decoupling cavity is further arranged in the first damping chamber in a separated mode, and a first decoupling film is arranged in the first decoupling cavity. Therefore, the hydraulic suspension assembly provides low dynamic stiffness in the Z direction and provides high damping in the X direction, so that simultaneous application of a high-damping angle damping characteristic and a low dynamic stiffness characteristic is achieved, low-frequency jitter and medium-frequency roar are controlled at the same time, and the purpose that high-speed roar and high-speed jitter are reduced at the same time through one hydraulic suspension assembly is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engine mounts, and in particular to a hydraulic mount for a hybrid vehicle. Background Art

[0002] The powertrain mount is the vibration isolation system connecting the engine and vehicle body. It not only attenuates the transmission of engine-induced vibration noise into the vehicle interior, but also attenuates the transmission of high-speed vibration into the vehicle interior. With increasing demand for vehicle ride comfort, the design of hydraulic mount structures within the system has garnered significant attention. Hydraulic mounts typically fulfill two functions: first, they isolate small-amplitude vibrations transmitted from the engine to the vehicle body during idling, requiring low dynamic stiffness and damping. Second, they limit engine displacement during acceleration or driving on uneven roads, preventing motion interference between the engine and surrounding components and protecting the engine's safety. In these situations, they require high dynamic stiffness and damping.

[0003] Although hydraulic mounts can currently solve most NVH problems of cars, such as starting impact, idling vibration, and driving on rough roads, as the market share of new energy vehicles increases, some NVH problems unique to new energy vehicles are receiving more and more attention from users. For example, the high-speed roar and high-speed vibration problems of new energy vehicles require the suspension system to make more contributions. Therefore, a hybrid hydraulic mount system that can take into account both high-speed vibration and high-speed roar is needed. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a hybrid vehicle hydraulic mount assembly. By varying the direction of action of the hydraulic mount, the system utilizes high damping performance in the X-direction and low dynamic stiffness in the Z-direction, thereby simultaneously utilizing high angular damping characteristics and low dynamic stiffness, while simultaneously controlling low-frequency vibration and mid-frequency booming.

[0005] A hybrid vehicle hydraulic mount assembly according to an embodiment of the present invention includes: a housing, wherein a mounting support is provided on the housing; a rubber main spring disposed in the housing, a first chamber being defined between the rubber main spring and an inner wall of the housing along a first direction, and a connecting bracket being provided on the rubber main spring for connecting to the range extender; a first leather cup, the first leather cup being disposed on one side of the housing, a first damping chamber being disposed between the first leather cup and the rubber main spring along the second direction, the first damping chamber being filled with damping fluid, a first decoupling chamber being further separated within the first damping chamber, and a first decoupling membrane being disposed within the first decoupling chamber; The first direction is a direction perpendicular to a horizontal plane of the hybrid vehicle, and the second direction is a moving direction of the hybrid vehicle.

[0006] According to some embodiments of the present invention, the first damping chamber further includes: a first upper cover plate and a first lower cover plate connected to the inner wall of the shell, the first upper cover plate and the first lower cover plate enclose the first decoupling chamber, a second chamber is formed between the first upper cover plate and the rubber main spring, a third chamber is formed between the first leather cup and the lower cover plate, and the third chamber is connected to the second chamber through the first decoupling membrane chamber.

[0007] According to some embodiments of the present invention, the system further includes: a fourth chamber, wherein the fourth chamber is disposed between the rubber main spring and the inner wall of the housing and is disposed opposite to the first chamber along the first direction.

[0008] According to some embodiments of the present invention, it also includes: a second leather cup, the second leather cup is arranged on the other side of the shell, a second damping chamber is provided between the second leather cup and the rubber main spring along the second direction, the second damping chamber is arranged opposite to the first damping chamber along the second direction, the second damping chamber is filled with damping fluid, and a second decoupling chamber is also separated in the second damping chamber, and a second decoupling membrane is provided in the second decoupling chamber.

[0009] According to some embodiments of the present invention, the second damping chamber further includes: a second upper cover plate and a second lower cover plate connected to the inner wall of the shell, the second upper cover plate and the second lower cover plate form a second decoupling chamber, a fifth chamber is formed between the second upper cover plate and the rubber main spring, a sixth chamber is formed between the first leather cup and the lower cover plate, and the sixth chamber is connected to the fifth chamber through the second decoupling membrane chamber.

[0010] According to some embodiments of the present invention, the rubber main spring includes a main spring arm and a connecting leg, and the main spring arm is connected to the housing through the connecting leg.

[0011] According to some embodiments of the present invention, a first limit block is provided in the first chamber, one end of the first limit block is connected to the rubber main spring, and the other end of the first limit block extends to a distance from the inner wall of the housing; and / or A second limit block is provided in the fourth chamber, and the second limit block is connected to the rubber main spring. One end of the second limit block is connected to the rubber main spring, and the other end extends to a distance from the inner wall of the shell.

[0012] A vehicle according to a second embodiment of the present invention is a hybrid vehicle, comprising: a hybrid vehicle hydraulic mount assembly according to any one of the above embodiments.

[0013] Beneficial effects

[0014] The hydraulic suspension assembly designed in the present invention provides low dynamic stiffness in the Z direction and high damping in the X direction, thereby realizing the simultaneous application of high damping angular damping characteristics and low dynamic stiffness stiffness characteristics, while controlling low-frequency vibration and medium-frequency roar, achieving the purpose of reducing high-speed roar and high-speed vibration with a set of hydraulic suspension assemblies, and effectively improving the vibration suppression and noise reduction performance of the vehicle under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 Schematic diagram of a hydraulic suspension assembly for a hybrid vehicle according to an embodiment of the present invention Figure 1 ; Figure 2 Schematic diagram of a hydraulic suspension assembly for a hybrid vehicle according to an embodiment of the present invention Figure 2 .

[0016] Reference numerals: 100. Hydraulic mount assembly 1. Shell; 11. Mounting support; 2. Rubber main spring; 21. Connecting bracket; 22. Main spring arm; 23. Connecting foot; 31. First leather cup; 32. Second leather cup; 41. First chamber; 42. Fourth chamber; 5. First damping chamber; 51. Second chamber; 52. First decoupling chamber; 521. First upper cover; 522. First lower cover; 53. Third chamber; 54. First decoupling membrane; 6. Second damping chamber; 61. Fifth chamber; 62. Second decoupling chamber; 621. Second upper cover; 622. Second lower cover; 63. Sixth chamber; 64. Second decoupling membrane; 71. First limit block; 72. Second limit block. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present disclosure, in conjunction with the drawings in the embodiments disclosed in this application. The description of the embodiments is actually only illustrative and exemplary and does not limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without carrying out creative work should fall within the scope of protection of the present disclosure. In addition, the technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the specification.

[0018] Combine Figure 1 、 Figure 2As shown, a hybrid vehicle hydraulic suspension assembly 100 according to an embodiment of the present invention generally comprises: a housing 1, a rubber main spring 2 disposed within the housing 1, and a first leather cup 31 disposed on one side of the housing 1. The housing 1 is provided with a mounting bracket 11 having multiple mounting holes for assembling the suspension assembly to the vehicle frame. The rubber main spring 2 includes multiple rubber arms, with adjacent rubber arms forming a chamber structure with the housing 1. A connecting bracket 21 is also provided at the center of the rubber main spring 2 for connecting to the range extender.

[0019] Specifically, a first chamber 41 is provided between the rubber main spring 2 and the inner wall of the shell 1 along a first direction. The first chamber 41 is enclosed by the two arms of the rubber main spring 2 and the shell 1. The first direction is perpendicular to the horizontal plane of the hybrid vehicle, that is, the Z direction in the three-dimensional coordinate system.

[0020] Because the engine speed of hybrid vehicles is higher than that of traditional vehicles when driving at high speed, the reciprocating inertia force of the engine in the Z direction is large, and the excitation in the Z direction is large, which causes the problem of high-speed roar. The dynamic stiffness in the Z direction of the suspension is sensitive to the vibration isolation of the Z direction excitation. Therefore, in order to reduce the vibration transmitted to the vehicle body in the Z direction, the suspension system needs a larger vibration isolation in the Z direction, and the dynamic stiffness in the Z direction of the suspension needs to be as low as possible. Therefore, by setting the Z direction of the suspension to a rubber suspension structure, the dynamic stiffness in the Z direction can be effectively reduced, thereby increasing the vibration isolation in the Z direction and reducing the high-speed roar of the entire vehicle.

[0021] At the same time, a first damping chamber 5 is provided along the second direction between the first leather cup 31 and the rubber main spring 2. The first damping chamber 5 is enclosed by two adjacent arms of the rubber main spring 2 and the first leather cup 31. The first damping chamber 5 is filled with damping fluid. The second direction is the direction of travel of the hybrid vehicle, that is, the X direction in the three-dimensional coordinate system.

[0022] Specifically, a first decoupling chamber 52 is separated in the first damping chamber 5, and a first decoupling membrane 54 is provided in the first decoupling chamber 52. The first decoupling chamber 52 can separate the first damping chamber 5 into a second chamber 51 and a third chamber 53. The second chamber 51 and the third chamber 53 are respectively arranged on both sides of the first decoupling chamber 52, and the third chamber 53 is connected to the second chamber 51 through the first decoupling membrane 54. The first decoupling chamber 52 is composed of a first upper cover plate 521 and a first lower cover plate 522 connected to the inner wall of the shell 1. The first upper cover plate 521 and the first lower cover plate 522 form the first decoupling chamber 52. The second chamber 51 is formed between the first upper cover plate 521 and the rubber main spring 2, and the third chamber 53 is formed between the first leather cup 31 and the lower cover plate.

[0023] During use, when the engine is in a state of small amplitude and high frequency, the engine transmits the vibration energy to the rubber main spring 2, and the rubber main spring 2 is deformed, thereby squeezing the damping fluid in the second chamber 51. At this time, no damping fluid flows between the second chamber 51 and the third chamber 53. The damping fluid in the squeezed second chamber 51 will act on the decoupling membrane, causing the decoupling membrane to undergo a slight deformation, thereby absorbing the vibration energy transmitted by the damping fluid.

[0024] When the engine is in a state of large amplitude and low frequency, the engine transmits the vibration energy to the rubber main spring 2, and the rubber main spring 2 is deformed, thereby squeezing the damping fluid in the second chamber 51. At this time, due to the large amplitude, the damping fluid in the decoupling membrane cavity will cause the decoupling membrane to undergo a large displacement and deformation, thereby causing the damping fluid in the second chamber 51 to flow through the decoupling membrane cavity into the third chamber 53, and then utilize the elasticity of the first leather cup 31 and the rubber main spring 2 to make the damping fluid flow back and forth, thereby absorbing the vibration energy.

[0025] In this way, a hydraulic assembly is provided in the X direction of the vehicle. By directing the flow of damping fluid in the X direction of the hydraulic mount, the damping performance of the vehicle's hydraulic mount assembly in the X direction is improved, and the problem of high-speed vibration in the X direction is suppressed. This solves the problem of high-speed vibration in the X direction caused by road excitation during high-speed driving due to uneven and fluctuating highway roads.

[0026] Therefore, the hydraulic mount assembly designed in the present invention sets a high damping angle in the vehicle's travel direction (X direction) and sets a low dynamic stiffness in a direction perpendicular to the vehicle's horizontal plane (Z direction). As a result, the high damping angle in the X direction is used to reduce high-speed X-direction vibration of 10-15Hz. At the same time, the low dynamic stiffness in the Z direction is used to reduce the dynamic-to-static ratio to below 1.4 in the mid-frequency range (70-150Hz), thereby achieving better vibration isolation and further achieving the effect of synchronously controlling high-speed roar and high-speed vibration.

[0027] In this way, by changing the direction of action of the hydraulic mount, the damping performance of the high damping angle is utilized in the X direction, and the low dynamic stiffness performance of the main action direction of the non-hydraulic mount is utilized in the Z direction, thereby achieving the simultaneous application of the high damping angle damping characteristics and the low dynamic stiffness stiffness characteristics, while controlling low-frequency vibration and medium-frequency roar, achieving the goal of reducing high-speed roar and high-speed vibration with a set of hydraulic mount assemblies, and effectively improving the vibration suppression and noise reduction performance of the vehicle under different working conditions.

[0028] Furthermore, based on the above embodiment, Figure 1As shown, the vehicle hydraulic suspension assembly 100 also includes a fourth chamber 42. The fourth chamber 42 is arranged between the rubber main spring 2 and the inner wall of the shell 1, and is arranged opposite to the first chamber 41 along the first direction. This is equivalent to forming two chambers in the Z direction, further reducing the dynamic stiffness in the Z direction, increasing the vibration isolation amount, and reducing high-speed roar.

[0029] Preferably, in some embodiments of the present application, Figure 1 and Figure 2 As shown, the vehicle hydraulic suspension assembly 100 further includes a second leather cup 32, which is provided on the other side of the housing 1 and is arranged opposite to the first leather cup 31. A second damping chamber 6 is provided between the second leather cup 32 and the rubber main spring 2 along the second direction, that is, the second damping chamber 6 is arranged opposite to the first damping chamber 5 along the second direction. The second damping chamber 6 is filled with damping fluid, and a second decoupling chamber 62 is further separated in the second damping chamber 6. A second decoupling membrane 64 is provided in the second decoupling chamber 62, so that the second damping chamber 6 can be decoupled through the second decoupling chamber 62. The fifth chamber 61 and the sixth chamber 63 are separated, and the fifth chamber 61 and the sixth chamber 63 are respectively arranged on both sides of the second decoupling chamber 62. The sixth chamber 63 is connected to the fifth chamber 61 through the second decoupling membrane 64. Specifically, the second decoupling chamber 62 includes a second upper cover plate 621 and a second lower cover plate 622 connected to the inner wall of the shell 1. The second upper cover plate 621 and the second lower cover plate 622 form the second decoupling chamber 62. The fifth chamber 61 is formed between the second upper cover plate 621 and the rubber main spring 2, and the sixth chamber 63 is formed between the first leather cup 31 and the lower cover plate.

[0030] As a result, two hydraulic systems are formed in the X direction of the vehicle, which is conducive to further improving the damping performance of the vehicle hydraulic suspension assembly in the X direction and suppressing the problem of high-speed X-direction vibration, thereby solving the problem of high-speed X-direction vibration of the whole vehicle caused by road excitation during high-speed driving due to uneven and fluctuating highway roads.

[0031] In some embodiments of the present application, Figure 1 As shown, the rubber main spring 2 includes a main spring arm 22 and a connecting leg 23. The connecting leg 23 is L-shaped, with its short side connected to the inner wall of the housing 1 and its long side extending toward the center. A gap is left between the inner side of the long side and the other side of the housing 1. The main spring arm 22 is vulcanized onto the connecting leg 23, thereby connecting the main spring arm 22 to the housing 1 via the connecting leg 23. This detachable connecting leg 23 not only facilitates maintenance and replacement of the entire rubber main spring 2, thereby reducing maintenance costs and avoiding the need to replace the entire hydraulic mount assembly, but also improves the support of the rubber main spring 2 in the Z direction through the metal connecting leg 23.

[0032] In some embodiments of the present application, Figure 1As shown, a first limit block 71 is provided in the first chamber 41. One end of the first limit block 71 is connected to the rubber main spring 2, and the other end extends to a distance from the inner wall of the shell 1. In this way, the setting of the first limit block 71 can play a role of limiting buffering, which is beneficial to extending the service life of the rubber main spring 2.

[0033] Similarly, a second limit block 72 is provided in the fourth chamber 42. The second limit block 72 is connected to the rubber main spring 2. One end of the second limit block 72 is connected to the rubber main spring 2, and the other end extends to the distance from the inner wall of the shell 1. The setting of the first limit block 71 can play a role of limiting buffering, which is beneficial to extending the service life of the rubber main spring 2.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships 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 therefore should not be understood as limiting the present invention.

[0035] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A hybrid vehicle hydraulic mount assembly, characterized in that: include: a housing, wherein a mounting support is provided on the housing; a rubber main spring disposed in the housing, a first chamber being defined between the rubber main spring and an inner wall of the housing along a first direction, and a connecting bracket being provided on the rubber main spring for connecting to the range extender; a first leather cup, the first leather cup being disposed on one side of the housing, a first damping chamber being disposed between the first leather cup and the rubber main spring along the second direction, the first damping chamber being filled with damping fluid, a first decoupling chamber being further separated within the first damping chamber, and a first decoupling membrane being disposed within the first decoupling chamber; The first direction is a direction perpendicular to a horizontal plane of the hybrid vehicle, and the second direction is a moving direction of the hybrid vehicle.

2. The hybrid vehicle hydraulic mount assembly according to claim 1, characterized in that: The first damping chamber also includes: a first upper cover plate and a first lower cover plate connected to the inner wall of the shell, the first upper cover plate and the first lower cover plate enclose the first decoupling chamber, a second chamber is formed between the first upper cover plate and the rubber main spring, a third chamber is formed between the first leather cup and the lower cover plate, and the third chamber is connected to the second chamber through the first decoupling membrane chamber.

3. A hybrid vehicle hydraulic mount assembly according to claim 1 or 2, characterized in that: Also includes: A fourth chamber is provided between the rubber main spring and the inner wall of the housing and is arranged opposite to the first chamber along the first direction.

4. The hybrid vehicle hydraulic mount assembly according to claim 3, characterized in that: Also includes: The second leather cup is arranged on the other side of the shell, a second damping chamber is provided between the second leather cup and the rubber main spring along the second direction, the second damping chamber is arranged opposite to the first damping chamber along the second direction, the second damping chamber is filled with damping fluid, and a second decoupling chamber is also separated in the second damping chamber, and a second decoupling membrane is provided in the second decoupling chamber.

5. The hybrid vehicle hydraulic mount assembly according to claim 4, characterized in that: The second damping chamber also includes: a second upper cover plate and a second lower cover plate connected to the inner wall of the shell, the second upper cover plate and the second lower cover plate form a second decoupling chamber, a fifth chamber is formed between the second upper cover plate and the rubber main spring, a sixth chamber is formed between the first leather cup and the lower cover plate, and the sixth chamber is connected to the fifth chamber through the second decoupling membrane chamber.

6. The hybrid vehicle hydraulic mount assembly according to claim 1, characterized in that: The rubber main spring includes a main spring support arm and a connecting support leg, and the main spring support arm is connected to the housing through the connecting support leg.

7. The hybrid vehicle hydraulic mount assembly according to claim 3, characterized in that: A first limiting block is provided in the first chamber, one end of the first limiting block is connected to the rubber main spring, and the other end of the first limiting block extends to a distance from the inner wall of the housing; and / or A second limit block is provided in the fourth chamber, and the second limit block is connected to the rubber main spring. One end of the second limit block is connected to the rubber main spring, and the other end extends to a distance from the inner wall of the shell.

8. A vehicle, said vehicle being a hybrid vehicle, characterized in that: A hybrid vehicle hydraulic suspension assembly as described in any one of claims 1 to 7 is used.

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