HYBRID DEVICE FOR A VEHICLE

Abstract

A hybrid device (100) provided in a housing (H) having one side coupled to a transmission and the other side coupled to an internal combustion engine, the hybrid device (100) comprising: a P1 electric motor (10) and a P2 electric motor (20) and a torsion damper (30) arranged between the P1 electric motor (10) and the P2 electric motor (20), wherein the torsion damper (30) comprises an anti-scattering unit (32) configured to prevent foreign substances (S) generated by compression of the torsion damper (30) from being released and introduced into the P1 electric motor (10) and the P2 electric motor (20).

Description

Technical area

[0001] The present invention relates to a hybrid device for a vehicle, and more particularly to a hybrid device for a vehicle capable of preventing foreign substances from being introduced into an electric motor. Background technology

[0002] In general, a hybrid vehicle refers to a vehicle that is powered by an efficient combination of two or more different types of power sources, that is, a vehicle powered by an internal combustion engine that obtains torque by burning fuel (fossil fuel such as gasoline) and an electric motor that obtains torque by electrical energy from a battery.

[0003] Research is currently being actively conducted into hybrid vehicles as a future vehicle capable of reducing emissions and improving fuel consumption by using an electric motor as an auxiliary power source alongside the internal combustion engine.

[0004] A hybrid vehicle typically uses an internal combustion engine and an electric motor. The hybrid vehicle uses the electric motor, which has relatively good low-speed torque characteristics, as its main power source at low speeds and the internal combustion engine, which has relatively good high-speed torque characteristics, as its main power source at high speeds.

[0005] Thus, the hybrid vehicle uses the electric motor in a low-speed section while the operation of the internal combustion engine using fossil fuel is stopped, and thus the hybrid vehicle has an excellent effect of improving fuel consumption and reducing exhaust gases.

[0006] The hybrid vehicle operates in an electric vehicle (EV) mode, which is a pure electric vehicle mode in which only the rotational power of the electric motor is used to drive the hybrid vehicle, or in a running mode, such as a hybrid electric vehicle (HEV) mode, in which the rotational power of the electric motor is used as auxiliary power while the rotational power of the internal combustion engine is used as the main power. The mode is switched from EV mode to HEV mode by starting the internal combustion engine.

[0007] For example, a mild hybrid device can implement an output power level corresponding to a full hybrid level within a short time by means of a combination of two or more electric motors.

[0008] The mild hybrid device is generally classified into P0, P1, P2, P3 and P4 depending on the positions of the electric motor, and the respective devices differ depending on whether the EV mode is implemented, the regenerative braking performance and the like.

[0009] Meanwhile, a torsional damper may be provided in the hybrid device, and since the torsional damper is repeatedly compressed, the torsional damper may be abraded due to friction.

[0010] In this case, foreign substances generated by the abrasion of the torsion damper may be scattered into the hybrid device, and metallic foreign substances may adhere to a rotor of an electric motor in the hybrid device because the rotor may have a magnet.

[0011] Thus, the metallic foreign substances adhering to the rotor can have an adverse effect on the performance of the electric motor.

[0012] DE 10 2005 055 424 A1 discloses a vehicle drive device, wherein a rotor shaft of a first electric motor is connected to a crankshaft of the internal combustion engine by fitting it to a gear element connected to the crankshaft. The stator and rotor shafts of the first electric motor are supported by a housing in which the first electric motor is housed.

[0013] US 2015 / 0 231 957 A1 discloses a transmission assembly for a motor vehicle with a transmission having a clutch, a clutch release device, a reversible electric rotating machine with a rotor provided with a central opening, and an intermediate shaft between the clutch and the rotor of the electric machine, the shaft carrying the clutch release device at the front and being inserted into the central opening of the rotor.The transmission assembly includes a dry friction clutch provided with a reaction plate, and includes, at the front, a damping dual flywheel configured to be attached to the crankshaft of the vehicle's internal combustion engine and forming the reaction plate of the dry friction clutch, and, at the rear, a torsional damper configured to be rotatably connected to the input shaft of the transmission, with the rotor of the electric machine being attached to the torsional damper. Short explanation of the invention

[0014] The present invention has an object to provide a hybrid device that seals a torsional damper to prevent foreign substances generated by friction from a torsional damper from being introduced into an electric motor, thereby improving the performance of the electric motor.

[0015] An exemplary embodiment of the present invention provides a hybrid device provided in a housing, one side of which is coupled to a transmission and the other side of which is coupled to an internal combustion engine, the hybrid device comprising: a P1 electric motor and a P2 electric motor and a torsional damper arranged between the P1 electric motor and the P2 electric motor, wherein the torsional damper has an anti-scattering unit configured to prevent foreign substances generated by compression of the torsional damper from being released and introduced into the P1 electric motor and the P2 electric motor.

[0016] In the housing, the P1 electric motor can be arranged closer to the combustion engine than the P2 electric motor.

[0017] The P1 electric motor may include a P1 stator and a P1 rotor, and a P1 rotor shaft may be connected to the P1 rotor.

[0018] The P1 rotor shaft may be shaped to surround at least a portion of the torsional damper when viewed from the internal combustion engine.

[0019] One end of the anti-scatter unit may be coupled to one end of the P1 rotor shaft positioned in one direction of the gearbox, and the other end of the anti-scatter unit may be coupled to the torsion damper.

[0020] The P1 rotor shaft may further include a groove portion recessed in a direction of the P1 rotor, and the foreign substances may be introduced into the groove portion.

[0021] According to the present invention, the structure for sealing the torsion damper can prevent foreign substances generated upon compression of the torsion damper from being introduced into the P1 electric motor or the P2 electric motor, thereby improving a performance of the P1 electric motor or the P2 electric motor.

[0022] The foregoing brief description of the invention is illustrative only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description. Short description of the drawings Fig. 1 is a view illustrating a hybrid device according to an exemplary embodiment of the present invention. Fig. 2 is an enlarged view of part A in Fig. 1. Fig. 3 is a view illustrating another exemplary embodiment of the present invention.

[0023] It should be understood that the accompanying drawings are not necessarily to scale, presenting a somewhat simplified representation of the various features to illustrate the basic principles of the invention. The specific design features of the present invention, as disclosed herein, have, for example, specific dimensions, orientations, positions, and shapes that are determined in part by the particular intended application and environment of use.

[0024] In the figures, reference numerals refer to the same or equivalent parts of the present invention throughout the various figures of the drawing. Detailed description

[0025] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when assigning reference numerals to components of the respective drawings, it should be noted that like components are designated by the same reference numerals wherever possible, even if the components are shown in different drawings. In addition, in the description of the present invention, the specific descriptions of well-known related arrangements or functions are omitted when it is determined that the specific descriptions might lead to confusion with regard to the subject matter of the present invention. Furthermore, the exemplary embodiments of the present invention are described below, but the scope of the present invention is not limited thereto and can of course be modified and implemented in various ways by those skilled in the art.

[0026] Fig. 1 is a view illustrating a hybrid device 100 according to an exemplary embodiment of the present invention.

[0027] Referring to Fig. 1, the hybrid device 100 may be provided in a housing H.

[0028] In the housing H, the hybrid device 100 may have a P1 electric motor 10, a P2 electric motor 20, a torsional damper 30, and an engine clutch 40.

[0029] Although not shown, the housing H may have one side coupled to a transmission (not shown) and another side coupled to an internal combustion engine (not shown).

[0030] The P1 electric motor 10 may include a P1 stator 12 and a P1 rotor 14, and the P1 stator 12 may be attached to the housing H, as shown in Fig. 1 shown.

[0031] The P2 electric motor 20 may also include a P2 stator 22 and a P2 rotor 24, and the P2 stator 22 may be attached to the housing H, as shown in Fig. 1 shown.

[0032] For example, the P1 rotor 14 may be connected to a P1 rotor shaft 142 and the P2 rotor 24 may be connected to a P2 rotor shaft 242.

[0033] The P1 rotor shaft 142 is splined to an engine output shaft (not shown) so that the P1 rotor shaft 142 can receive rotational power generated by operation of the engine via the engine output shaft.

[0034] As in Fig. 1, the P1 electric motor 10 may be arranged closer to the combustion engine than the P2 electric motor 20.

[0035] The torsional damper 30 may be arranged between the P1 electric motor 10 and the P2 electric motor 20, and the engine clutch 40 may be splined to the P2 rotor shaft 242.

[0036] For example, the torsional damper is also called a dual-mass flywheel and can be installed between the internal combustion engine and the transmission of the hybrid vehicle and can be configured to dampen the torsional vibrations generated during power transmission.

[0037] The engine clutch 40 may be configured to enable or disable transmission of rotational power from the engine to the transmission.

[0038] For example, the engine clutch 40 may be splined to the torsional damper 30 and splined to the P2 rotor shaft 242, as described above, so that the rotational power transmitted through the P1 rotor shaft 142 may be transmitted to the P2 rotor shaft 242.

[0039] The P2 rotor shaft 242 may be splined to a transmission input shaft 50, and the transmission input shaft 50 may transmit the rotational power transmitted via the P2 rotor shaft 242 to the transmission.

[0040] However, as in Fig. 1, a first bearing 70 may be provided between one end (in an engine direction) of the housing H and an outer diameter portion of the P1 rotor shaft 142 to support the P1 rotor shaft 142 so that the P1 rotor shaft 142 is rotatable.

[0041] A support unit 60 for supporting the transmission input shaft 50 is provided on the other side (in a direction of the transmission) of the housing H, and a second bearing 80 is provided between one end of the support unit 60 and an outer diameter portion of the P2 rotor shaft 242 to support the P2 rotor shaft 242 so that the P2 rotor shaft 242 is rotatable.

[0042] Fig. 2 is an enlarged view of part A in Fig. 1.

[0043] Hereinafter, a structure for sealing the torsion damper 30 according to the present invention will be described in detail with reference to Fig. 1 and Fig. 2.

[0044] Referring to Fig. 1 and Fig. 2, the P1 rotor shaft 142 may be shaped to surround at least a portion of the torsional damper 30 when viewed from the internal combustion engine.

[0045] In this case, an open end may be formed on one side of the P1 rotor shaft 142 toward the gearbox.

[0046] In the exemplary embodiment of the present invention, when the torsion damper 30 is repeatedly compressed, the torsion damper 30 may be abraded due to friction.

[0047] Foreign substances S generated by the abrasion of the torsion damper 30 may be scattered into the housing H of the hybrid device 100.

[0048] In this case, because the P1 rotor 14 or the P2 rotor 24 has magnetic substances, the scattered metallic foreign substances S may adhere to the P1 rotor 14 or the P2 rotor 24, which may lead to deterioration of the performance of the electric motor.

[0049] Therefore, in the exemplary embodiment of the present invention, an anti-scattering unit 32 is provided to prevent the foreign substances S generated by the abrasion of the torsion damper 30 from being scattered into the housing H.

[0050] One end of the anti-scatter unit 32 may be coupled to the (open) end of the P1 rotor shaft 142 positioned toward the gearbox.

[0051] For example, one end of the anti-scatter unit 32 may be coupled to the end of the P1 rotor shaft 142 by welding.

[0052] And the anti-scatter unit 32 may be configured to support a spring in the torsion damper 30 to maintain an attitude of the spring.

[0053] The other end of the anti-scatter unit 32 may be coupled to the torsion damper 30.

[0054] As described above, one side (toward the engine) of the torsion damper 30 may be surrounded by the P1 rotor shaft 142, and the other side (toward the transmission) of the torsion damper 30 may be sealed by the anti-scatter unit 32.

[0055] Thus, the foreign substances S generated by the abrasion of the torsion damper 30 cannot be scattered to the outside, but can remain in a space sealed by the P1 rotor shaft 142 and the anti-scattering unit 32.

[0056] Because the P1 rotor 14 is continuously rotated by the rotational power transmitted from the internal combustion engine, the foreign substances S can be rotated by centrifugal force of the P1 rotor 14 and then accumulated in the sealed space, as shown in Fig. 2 shown.

[0057] The sealing structure can prevent the foreign substances S generated by the compression of the torsion damper 30 from being introduced into the P1 electric motor 10 or the P2 electric motor 20, thereby improving the performance of the P1 electric motor 10 or the P2 electric motor 20.

[0058] Fig. 3 is a view illustrating another exemplary embodiment of the present invention.

[0059] As in the exemplary design with reference to Fig. 2, in another exemplary embodiment of the present invention, one side (toward the engine) of the torsion damper 30 may be surrounded by the rotor shaft P1 142, and the other side (toward the transmission) of the torsion damper 30 may be sealed by the anti-scatter unit 32.

[0060] Referring to Fig. 3, the P1 rotor shaft 142 further includes a groove portion 1422 recessed in a direction of the P1 rotor 14.

[0061] As described above, the foreign substances S can be rotated by the centrifugal force of the P1 rotor 14 and then accumulated in the sealed space. However, according to another exemplary embodiment of the present invention, as shown in Fig. 3, the groove portion 1422 may be provided to further increase the amount of foreign substances S to be collected.

[0062] The above description is provided merely to illustrate the technical spirit of the present invention, and those skilled in the art to which the present invention belongs will recognize that various modifications, changes, and substitutions are possible without departing from the essential spirit of the present invention. Accordingly, the exemplary embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but to describe it, and the scope of the technical spirit of the present invention is not limited by the exemplary embodiments and the accompanying drawings.The scope of the present invention should be construed based on the following claims, and all technical thought within the equivalent scope thereto should be construed as falling within the scope of the present invention.

[0063] As described above, the exemplary embodiments have been described and illustrated in the drawings and specification. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and use various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. As is apparent from the foregoing description, certain aspects of the present invention are not limited to the specific details of the examples presented herein, and it is therefore contemplated that other modifications and applications, or variations thereof, will occur to those skilled in the art.However, many changes, modifications, variations, and other uses and applications of the present design will become apparent to those skilled in the art after consideration of the specification and the accompanying drawings. All such changes, modifications, variations, and other uses and applications that do not depart from the scope of the invention are deemed to be covered by the invention, which is limited only by the following claims.

Claims

[1] Hybrid device (100) provided in a housing (H) the one side of which is coupled to a gearbox and the other side of which is coupled to an internal combustion engine, the hybrid device (100) comprising: a P1 electric motor (10) and a P2 electric motor (20) and a torsional damper (30) arranged between the P1 electric motor (10) and the P2 electric motor (20), wherein the torsional damper (30) has an anti-scattering unit (32) configured to prevent foreign substances (S) generated by compression of the torsional damper (30) from being released and introduced into the P1 electric motor (10) and the P2 electric motor (20). [2] Hybrid device (100) according to claim 1, wherein in the housing (H) the P1 electric motor (10) is arranged closer to the internal combustion engine than the P2 electric motor (20). [3] Hybrid device (100) according to claim 1 or 2, wherein the P1 electric motor (10) has a P1 stator (12) and a P1 rotor (14), wherein a P1 rotor shaft (142) is connected to the P1 rotor (14). [4] Hybrid device (100) according to claim 3, wherein the P1 rotor shaft (142) is shaped to surround at least part of the torsional damper (30) when viewed from the internal combustion engine. [5] Hybrid device (100) according to claim 3 or 4, wherein one end of the anti-scattering unit (32) is coupled to one end of the P1 rotor shaft (142) which is positioned in one direction of the gearbox, and the other end of the anti-scattering unit (32) is coupled to the torsional damper (30). [6] Hybrid device (100) according to one of claims 3 to 5, wherein the P1 rotor shaft (142) further comprises a groove section (1422) which is recessed in one direction of the P1 rotor (14), wherein the foreign substances (S) are introduced into the groove section (1422).

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