KR-102962277-B1 - POWER TRANSMISSION APPARATUS FOR HYBRID ELECTRIC VEHICLE

KR102962277B1KR 102962277 B1KR102962277 B1KR 102962277B1KR-102962277-B1

Abstract

A power transmission device for a hybrid vehicle comprising an engine, a first motor, and a second motor as power sources for driving a vehicle, the device comprises: an engine torque input shaft receiving torque from the engine; a first motor shaft connected to the first motor to transmit torque; a second motor shaft connected to the second motor to transmit torque; an output shaft arranged parallel to the engine torque input shaft, the first motor shaft, and the first motor shaft, and fixedly connected to the second motor shaft by an external gear; a first clutch configured to selectively power-connect the engine torque input shaft to the output shaft with a plurality of gear ratios; and a second clutch configured to selectively power-connect the first motor shaft to the engine torque input shaft and to the output shaft.

Inventors

최월선
양호림
서범주
권혁준
이승욱
김석준
김달철
최영일

Assignees

현대자동차 주식회사
기아 주식회사

Dates

Publication Date: 20260507
Application Date: 20211015

Claims (12)

A power transmission device for a hybrid vehicle comprising an engine, a first motor, and a second motor as a power source for driving a vehicle, An engine torque input shaft that receives the torque of the above engine; A first motor shaft connected to the first motor to transmit torque; A second motor shaft connected to the second motor to transmit torque; The above engine torque input shaft, the above first motor shaft, and an output shaft arranged parallel to the above first motor shaft and fixedly connected to the above second motor shaft via an external gear; A first clutch configured to selectively power-connect the engine torque input shaft to the output shaft with a plurality of gear ratios; and A power transmission device for a hybrid vehicle comprising: a second clutch configured to selectively power-connect the first motor shaft to the engine torque input shaft and to the output shaft.
In paragraph 1, On the first motor shaft, a first motor shaft gear and a second motor shaft gear are respectively rotatably arranged; The second clutch is configured to selectively connect the first motor shaft to the first motor shaft gear and to the second motor shaft gear; A third motor shaft gear is fixedly positioned on the second motor shaft; On the output shaft above, a plurality of output shaft gears are arranged; and A power transmission device for a hybrid vehicle, wherein the third motor shaft gear is externally connected to one of the output shaft gears fixedly positioned on the output shaft among the plurality of output shaft gears.
In paragraph 2, On the engine torque input shaft, a first input shaft gear and a second input shaft gear are rotatably arranged, and a third input shaft gear is fixedly arranged; The plurality of output shaft gears includes a first output shaft gear fixedly disposed on the output shaft and externally connected to the first input shaft gear, a second output shaft gear fixedly disposed on the output shaft and externally connected to the second input shaft gear, and a third output shaft gear fixedly disposed on the output shaft and externally connected to the first motor shaft gear; and A power transmission device for a hybrid vehicle, wherein the first clutch is positioned on the engine torque input shaft and configured to selectively connect the engine torque input shaft to the first input shaft gear and to the second input shaft gear.
In Paragraph 3, A power transmission device for a hybrid vehicle, wherein the third motor shaft gear is externally connected to the third output shaft gear.
In Paragraph 3, The above plurality of output shaft gears further include a fourth output shaft gear fixedly disposed on the output shaft, and A power transmission device for a hybrid vehicle, wherein the third motor shaft gear is externally connected to the fourth output shaft gear.
In paragraph 2, On the engine torque input shaft, a first input shaft gear and a second input shaft gear are fixedly disposed, and a third input shaft gear is fixedly disposed. The plurality of output shaft gears includes a first output shaft gear rotatably disposed on the output shaft and externally connected to the first input shaft gear, a second output shaft gear rotatably disposed on the output shaft and externally connected to the second input shaft gear, and a third output shaft gear fixedly disposed on the output shaft and externally connected to the first motor shaft gear. A power transmission device for a hybrid vehicle, wherein the first clutch is positioned on the output shaft and configured to selectively connect the output shaft to the first output shaft gear and the second output shaft gear.
In paragraph 6, A power transmission device for a hybrid vehicle, wherein the third motor shaft gear is externally connected to the third output shaft gear.
In paragraph 6, The above plurality of output shaft gears further include a fourth output shaft gear fixedly disposed on the output shaft, and A power transmission device for a hybrid vehicle, wherein the third motor shaft gear is externally connected to the fourth output shaft gear.
In any one of paragraphs 1 through 8, When the first clutch is in a neutral state, an EV mode is implemented in which the hybrid vehicle is driven solely by the torque of one or more of the first motor and the second motor, and, A power transmission device for a hybrid vehicle, wherein when the first clutch power-connects the engine torque input shaft to the output shaft, a parallel mode is implemented to drive the hybrid vehicle by adding the torque of the engine to the torque of one or more of the first motor and the second motor.
In Paragraph 9, When the first clutch power-connects the engine torque input shaft to the output shaft at the higher gear ratio among the plurality of gear ratios, an underdrive parallel mode is implemented to drive the hybrid vehicle at the underdrive gear ratio, and A power transmission device for a hybrid vehicle, wherein when the first clutch power-connects the engine torque input shaft to the output shaft at the lower gear ratio among the plurality of gear ratios, an overdrive parallel mode for driving the hybrid vehicle at an overdrive gear ratio is implemented.
In any one of paragraphs 1 through 8, When the first clutch is in a neutral state, When the second clutch is in a neutral state, an EV1 mode is implemented in which the hybrid vehicle is driven solely by the torque of the second motor, and When the second clutch power-connects the first motor shaft to the output shaft, an EV2 mode is implemented to drive the hybrid vehicle by adding the torque of the first motor to the torque of the second motor, and A power transmission device for a hybrid vehicle, wherein when the second clutch power-connects the first motor shaft to the engine torque input shaft, the hybrid vehicle is driven solely by the torque of the second motor, and a series mode is implemented in which the first motor generates power using the torque of the engine.
In any one of paragraphs 1 through 8, When the above first clutch power-connects the engine torque input shaft to the output shaft, When the second clutch is in a neutral state, a parallel mode is implemented to drive the hybrid vehicle by adding only the torque of the second motor to the torque of the engine, and When the second clutch power-connects the first motor shaft to the output shaft, a parallel mode is implemented to drive the hybrid vehicle by adding the torque of the second motor and the torque of the first motor to the torque of the engine, and A power transmission device for a hybrid vehicle, wherein when the second clutch power-connects the first motor shaft to the engine torque input shaft, a series-parallel mode is implemented in which a portion of the engine's torque is added to the second motor's torque to drive the hybrid vehicle, and the first motor generates power using the remainder of the engine's torque.

Description

Power transmission apparatus for hybrid electric vehicles The present disclosure relates to a hybrid vehicle, and more specifically, to a power transmission device for a hybrid vehicle. A hybrid vehicle is a vehicle that uses two or more power sources and can be combined in various ways. As power sources, a combination of a conventional fossil fuel-powered gasoline or diesel engine and a motor/generator driven by electric energy is used. Depending on the combination of the engine and the motor/generator, such hybrid vehicles can implement an EV mode driven solely by the motor/generator, an HEV mode driven by the simultaneous operation of the engine and the motor/generator, and an engine mode driven solely by the engine. In addition, hybrid vehicles can generate power for the motor by driving the engine. Therefore, a power transmission system capable of implementing various driving modes and/or generation modes with a simplified or efficient configuration contributes to the marketability of hybrid vehicles. The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. FIG. 1 is a configuration diagram of a power transmission device for a hybrid vehicle according to a first embodiment of the present disclosure. FIG. 2 is an operation table illustrating the operation according to the operation of a clutch of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 3 illustrates the power flow in EV1 mode of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 4 illustrates the power flow in EV2 mode of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 5 illustrates the power flow in a series mode of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 6 illustrates the power flow in series-parallel mode 1 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 7 illustrates the power flow in series-parallel mode 2 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 8 illustrates the power flow in parallel mode 1-1 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 9 illustrates the power flow in parallel mode 1-2 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 10 illustrates the power flow in parallel mode 2-1 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 11 illustrates the power flow in parallel mode 2-2 of a power transmission device for a hybrid vehicle according to an embodiment of the present disclosure. FIG. 12 is a configuration diagram of a power transmission device for a hybrid vehicle according to a second embodiment of the present disclosure. FIG. 13 is a configuration diagram of a power transmission device for a hybrid vehicle according to a third embodiment of the present disclosure. FIG. 14 is a configuration diagram of a power transmission device for a hybrid vehicle according to the fourth embodiment of the present disclosure. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings, provided that identical or similar components are given identical or similar reference numerals and redundant descriptions thereof will be omitted. In describing the embodiments disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the embodiments disclosed in this specification. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connecte