U.S. patent application number 17/029847 was filed with the patent office on 2021-12-09 for powertrain for hybrid vehicle.
This patent application is currently assigned to Hyundai Motor Company. The applicant listed for this patent is Hyundai Motor Company, Kia Motors Corporation. Invention is credited to Bong Hyun CHO, Byung Dae CHOI, Gwang Soo HWANG, Jae Young JEON, Jun Seong KANG, Hyung Min KIM, Jin Yong KIM, Hyu Tae SHIM.
Application Number | 20210379980 17/029847 |
Document ID | / |
Family ID | 1000005983333 |
Filed Date | 2021-12-09 |
United States Patent
Application |
20210379980 |
Kind Code |
A1 |
KIM; Hyung Min ; et
al. |
December 9, 2021 |
POWERTRAIN FOR HYBRID VEHICLE
Abstract
A powertrain for a hybrid vehicle may include a planetary gear
set including five rotation elements, an input shaft connected to
an engine and configured to be selectively connectable to a first
rotation element and to a fourth rotation element of the planetary
gear set, a motor generator connected to a second rotation element
of the planetary gear set, an output shaft connected to a third
rotation element of the planetary gear set, and a brake configured
to selectively fix the fifth rotation element of the planetary gear
set to a transmission housing.
Inventors: |
KIM; Hyung Min; (Suwon-Si,
KR) ; CHO; Bong Hyun; (Gunpo-si, KR) ; JEON;
Jae Young; (Osan-si, KR) ; CHOI; Byung Dae;
(Seoul, KR) ; KIM; Jin Yong; (Incheon, KR)
; SHIM; Hyu Tae; (Hwaseong-si, KR) ; HWANG; Gwang
Soo; (Hwaseong-si, KR) ; KANG; Jun Seong;
(Gwacheon-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hyundai Motor Company
Kia Motors Corporation |
Seoul
Seoul |
|
KR
KR |
|
|
Assignee: |
Hyundai Motor Company
Seoul
KR
Kia Motors Corporation
Seoul
KR
|
Family ID: |
1000005983333 |
Appl. No.: |
17/029847 |
Filed: |
September 23, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B60K 6/26 20130101; F16H
3/663 20130101; B60K 6/365 20130101; B60K 6/405 20130101; B60K
6/543 20130101; B60K 2006/381 20130101; B60K 6/38 20130101; B60K
6/24 20130101; B60K 2006/262 20130101 |
International
Class: |
B60K 6/365 20060101
B60K006/365; B60K 6/24 20060101 B60K006/24; B60K 6/26 20060101
B60K006/26; B60K 6/38 20060101 B60K006/38; B60K 6/405 20060101
B60K006/405; F16H 3/66 20060101 F16H003/66 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 8, 2020 |
KR |
10-2020-0069185 |
Claims
1. A powertrain apparatus for a vehicle, the powertrain apparatus
comprising: a planetary gear set including a first rotation
element, a second rotation element, a third rotation element, a
fourth rotation element and a fifth rotation element; an input
shaft connected to a power source and being selectively connectable
to either or both of the first rotation element and the fourth
rotation element of the planetary gear set; a motor generator
connected to the second rotation element of the planetary gear set;
an output shaft fixedly connected to the third rotation element of
the planetary gear set; a brake configured to selectively fix the
fifth rotation element of the planetary gear set to a transmission
housing; and a third clutch, wherein the motor generator is
selectively connectable to the first rotation element of the
planetary gear set via the third clutch.
2. The powertrain apparatus according to claim 1, wherein the power
source is an engine.
3. The powertrain apparatus according to claim 1, further includes:
a first clutch and a second clutch, wherein the input shaft is
selectively connectable to the first rotation element of the
planetary gear set via the first clutch, and wherein the input
shaft is selectively connectable to the fourth rotation element of
the planetary gear set via the second clutch.
4. (canceled)
5. (canceled)
6. The powertrain apparatus according to claim 7, wherein the
planetary gear set is a Ravigneaux planetary gear set.
7. A powertrain apparatus for a vehicle, the powertrain apparatus
comprising: a planetary gear set including a first rotation
element, a second rotation element, a third rotation element, a
fourth rotation element and a fifth rotation element; an input
shaft connected to a power source and being selectively connectable
to either or both of the first rotation element and the fourth
rotation element of the planetary gear set; a motor generator
connected to the second rotation element of the planetary gear set;
an output shaft fixedly connected to the third rotation element of
the planetary gear set; and a brake configured to selectively fix
the fifth rotation element of the planetary gear set to a
transmission housing, wherein, in the planetary gear set, the first
rotation element is a first sun gear, the second rotation element
is a second sun gear, the third rotation element is a common
carrier, the fourth rotation element is a first ring gear, and the
fifth rotation element is a second ring gear.
8. The powertrain apparatus according to claim 7, further includes:
a first clutch and a second clutch, wherein the input shaft is
selectively connectable to the first sun gear of the planetary gear
set via the first clutch, and wherein the input shaft is
selectively connectable to the first ring gear of the planetary
gear set via the second clutch.
9. The powertrain apparatus according to claim 8, further including
a third clutch, wherein the motor generator is selectively
connectable to the first sun gear of the planetary gear set via the
third clutch.
10. The powertrain apparatus according to claim 7, further
including a third clutch, wherein the motor generator is
selectively connectable to the first sun gear of the planetary gear
set via the third clutch.
11. A powertrain apparatus for a vehicle, the powertrain apparatus
comprising: a planetary gear set including a first rotation
element, a second rotation element, a third rotation element, a
fourth rotation element and a fifth rotation element; a first
rotation shaft connected to a power source; a second rotation shaft
fixedly connected to the first rotation element of the planetary
gear set; a third rotation shaft connecting the second rotation
element of the planetary gear set to a motor generator; a fourth
rotation shaft fixedly connected to the third rotation element of
the planetary gear set and provided as an output shaft; a fifth
rotation shaft fixedly connected to the fourth rotation element of
the planetary gear set; a sixth rotation shaft fixedly connected to
the fifth rotation element of the planetary gear set; a first
clutch provided to selectively connect the first rotation shaft to
the second rotation shaft; a second clutch provided to selectively
connect the first rotation shaft to the fifth rotation shaft; and a
brake provided to selectively fix the sixth rotation shaft to a
transmission housing, wherein, in the planetary gear set, the first
rotation element is a first sun gear, the second rotation element
is a second sun gear, the third rotation element is a common
carrier, the fourth rotation element is a first ring gear, and the
fifth rotation element is a second ring gear.
12. The powertrain apparatus according to claim 11, wherein the
power source is an engine.
13. The powertrain apparatus according to claim 11, further
including: a third clutch provided to selectively connect the
second rotation shaft to the third rotation shaft.
14. The powertrain apparatus according to claim 11, further
including: a third clutch provided to selectively connect the
second rotation shaft to the motor generator.
15. The powertrain apparatus according to claim 11, wherein the
planetary gear set is a Ravigneaux planetary gear set.
16. (canceled)
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2020-0069185, filed on Jun. 8, 2020 in the
Korean Intellectual Property Office, the entire contents of which
is incorporated herein for all purposes by this reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] The present invention relates to a powertrain structure for
a hybrid vehicle.
Description of Related Art
[0003] A hybrid vehicle is provided with a powertrain that
appropriately combines power from an engine with power from an
electric motor, improving fuel efficiency while achieving power
performance required for the vehicle.
[0004] It is preferable for the powertrain for a hybrid vehicle to
have as few components as possible and a simple structure, to
realize as many gear stages as possible, and to achieve power
performance required for the vehicle while improving the fuel
efficiency of an engine.
[0005] The information included in this Background of the Invention
section is only for enhancement of understanding of the general
background of the invention and may not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0006] Various aspects of the present invention are directed to
providing a powertrain for a hybrid vehicle, which has as few
components as possible and a simple structure, is less costly to
produce, is easy to mount to a vehicle, realizes as many gear
stages as possible, and thus sufficiently achieves power
performance required for the vehicle while improving the fuel
efficiency of an engine.
[0007] In accordance with an aspect of the present invention, the
above and other objects may be accomplished by the provision of a
powertrain for a hybrid vehicle, including a planetary gear set
including five rotation elements, an input shaft connected to an
engine and configured to be selectively connectable to a first
rotation element and to a fourth rotation element of the planetary
gear set, a motor generator connected to a second rotation element
of the planetary gear set, an output shaft connected to a third
rotation element of the planetary gear set, and a brake configured
to selectively fix the fifth rotation element of the planetary gear
set to a transmission housing.
[0008] In the planetary gear set, the first rotation element may be
configured as a first sun gear, the second rotation element may be
configured as a second sun gear, the third rotation element may be
configured as a common carrier, the fourth rotation element may be
configured as a first ring gear, and the fifth rotation element may
be configured as a second ring gear.
[0009] The input shaft may be connected to the first sun gear of
the planetary gear set via a first clutch, and may be connected to
the first ring gear of the planetary gear set via a second
clutch.
[0010] The motor generator may be selectively connectable to the
first sun gear of the planetary gear set via a third clutch.
[0011] In accordance with another aspect of the present invention,
there is a provided a powertrain for a hybrid vehicle, including a
first rotation shaft connected to an engine, a second rotation
shaft connected to a first rotation element of a planetary gear
set, a third rotation shaft connecting a second rotation element of
the planetary gear set to a motor generator, a fourth rotation
shaft provided as an output shaft connected to a third rotation
element of the planetary gear set, a fifth rotation shaft connected
to a fourth rotation element of the planetary gear set, a sixth
rotation shaft connected to a fifth rotation element of the
planetary gear set, a first clutch provided to connect or
disconnect the first rotation shaft and the second rotation shaft
to or from each other, a second clutch provided to connect or
disconnect the first rotation shaft and the fifth rotation shaft to
or from each other, and a brake provided to selectively fix the
sixth rotation shaft to a transmission housing.
[0012] The powertrain may further include a third clutch provided
to connect or disconnect the second rotation shaft and the third
rotation shaft to or from each other.
[0013] In the planetary gear set, the first rotation element may be
configured as a first sun gear, the second rotation element may be
configured as a second sun gear, the third rotation element may be
configured as a common carrier, the fourth rotation element may be
configured as a first ring gear, and the fifth rotation element may
be configured as a second ring gear.
[0014] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a diagram showing the configuration of a
powertrain for a hybrid vehicle according to various exemplary
embodiments of the present invention;
[0016] FIG. 2 is a diagram showing the configuration of a
powertrain for a hybrid vehicle according to various exemplary
embodiments of the present invention;
[0017] FIG. 3 is an operation mode table of the various exemplary
embodiments of the present invention; and
[0018] FIG. 4 is a speed diagram of the powertrain according to
various exemplary embodiments of the present invention.
[0019] It may be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the present invention. The specific design features
of the present invention as included herein, including, for
example, specific dimensions, orientations, locations, and shapes
will be determined in part by the particularly intended application
and use environment.
[0020] In the figures, reference numbers refer to the same or
equivalent portions of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION
[0021] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the present
invention(s) will be described in conjunction with exemplary
embodiments of the present invention, it will be understood that
the present description is not intended to limit the present
invention(s) to those exemplary embodiments. On the other hand, the
present invention(s) is/are intended to cover not only the
exemplary embodiments of the present invention, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the present
invention as defined by the appended claims
[0022] Reference will now be made in detail to the exemplary
embodiments of the present invention, examples of which are
illustrated in the accompanying drawings.
[0023] Referring to FIG. 1 and FIG. 2, each of embodiments of a
powertrain for a hybrid vehicle according to various exemplary
embodiments of the present invention includes a planetary gear set
PG including five rotation elements, an input shaft IN connected to
an engine and configured to be selectively connectable to a first
rotation element and to a fourth rotation element of the planetary
gear set PG, a motor generator MG connected to a second rotation
element of the planetary gear set PG, an output shaft OUT connected
to a third rotation element of the planetary gear set PG, and a
brake B1 configured to fix a fifth rotation element of the
planetary gear set PG to a transmission housing CS.
[0024] According to various exemplary embodiments of the present
invention, the planetary gear set PG, as shown in the drawings, is
configured as a Ravigneaux-type planetary gear set PG.
[0025] In the planetary gear set PG, the first rotation element is
configured as a first sun gear S1, the second rotation element is
configured as a second sun gear S2, the third rotation element is
configured as a common carrier CM, the fourth rotation element is
configured as a first ring gear R1, and the fifth rotation element
is configured as a second ring gear R2.
[0026] The input shaft IN is connected to the first sun gear S1 of
the planetary gear set PG via a first clutch CL1, and is connected
to the first ring gear R1 of the planetary gear set PG via a second
clutch CL2.
[0027] Thus, the input shaft IN receives power from the engine and
transmits the power from the engine to the first sun gear S1 in the
engaged state of the first clutch CL1, or transmits the power from
the engine to the first ring gear R1 in the engaged state of the
second clutch CL2.
[0028] Compared to the various exemplary embodiments shown in FIG.
1, the various exemplary embodiments shown in FIG. 2 further
includes a third clutch CL3. The motor generator MG is configured
to be selectively connectable to the first sun gear S1 of the
planetary gear set PG via the third clutch CL3.
[0029] Thus, in the engaged state of the third clutch CL3, the
first sun gear S1 and the second sun gear S2 are operated in a
manner which is interlocked with the operation of the motor
generator MG.
[0030] The brake B1 is provided to fix or release the second ring
gear R2 to or from a transmission housing CS.
[0031] The exemplary embodiments of the present invention may also
be referred to as follows.
[0032] Each of the exemplary embodiments of the powertrain for a
hybrid vehicle according to various exemplary embodiments of the
present invention includes a first rotation shaft SH1, which is an
input shaft IN connected to an engine ENG, a second rotation shaft
SH2 connected to a first rotation element of a planetary gear set
PG, a third rotation shaft SH3 connecting a second rotation element
of the planetary gear set PG to a motor generator MG, a fourth
rotation shaft SH4, which is an output shaft OUT connected to a
third rotation element of the planetary gear set PG, a fifth
rotation shaft SH5 connected to a fourth rotation element of the
planetary gear set PG, a sixth rotation shaft SH6 connected to a
fifth rotation element of the planetary gear set PG, a first clutch
CL1 provided to connect or disconnect the first rotation shaft SH1
and the second rotation shaft SH2 to or from each other, a second
clutch CL2 provided to connect or disconnect the first rotation
shaft SH1 and the fifth rotation shaft SH5 to or from each other,
and a brake B1 provided to connect the sixth rotation shaft SH6 to
a transmission housing CS.
[0033] Compared to the various exemplary embodiments of the present
invention in FIG. 1, the various exemplary embodiments further in
FIG. 2 include a third clutch CL3 provided to connect or disconnect
the second rotation shaft SH2 and the third rotation shaft SH3 to
or from each other.
[0034] As may be seen in the operation mode table of FIG. 3, the
powertrain for a hybrid vehicle according to various exemplary
embodiments of the present invention configured as described above
realizes the first gear stage, the fourth gear stage, and the
reverse gear stage (R-range) in an electric vehicle (EV) mode,
realizes the second gear stage, the third gear stage, and the
fourth gear stage in an engine mode, in which only the power from
the engine is used, or in a hybrid mode, in which the power from
the motor is combined with the power from the engine, enables a
continuous change of the shift ratio between the fifth gear stage
shift ratio and the sixth gear stage shift ratio in an electric
continuously variable transmission (E-CVT) mode, which is a type of
hybrid mode which is configured for achieving a continuous change
of the shift ratio by controlling the motor generator MG in the
state in which the power from the engine is input, and realizes two
stop-and-charge modes, in which charging is performed by driving
the motor generator MG using the power from the engine when the
vehicle is stopped.
[0035] In the fourth gear stage in the engine mode (or the hybrid
mode), in which both the first clutch CL1 and the second clutch CL2
are in the engaged state, or in the fourth gear stage in the EV
mode, in which the third clutch CL3 is in the engaged state, all of
the rotation elements of the planetary gear set PG are integrated
to realize a shift ratio of 1:1. In the instant state, regenerative
power generation is performed by the motor generator MG.
[0036] FIG. 4 is a speed diagram showing the gear stages realized
by the powertrain according to various exemplary embodiments of the
present invention described above.
[0037] As described above, the present invention has a relatively
simple configuration, is less costly to produce, and is easily
applied to a front-wheel-drive vehicle due to the ease with which
the same is provided to a vehicle. Furthermore, the present
invention is configured for realizing one reverse gear stage and
six forward gear stages, easily achieving power performance
required for the vehicle. Furthermore, the present invention is
configured for continuously changing an overdrive shift ratio of
the fifth gear stage or the sixth gear stage, thereby improving
fuel efficiency, when the vehicle is traveling at a high speed.
[0038] As is apparent from the above description, various aspects
of the present invention are directed to providing a powertrain for
a hybrid vehicle, which has as few components as possible and a
simple structure, is less costly to produce, is easy to mount to a
vehicle, realizes as many gear stages as possible, and thus
sufficiently achieves power performance required for the vehicle
while improving the fuel efficiency of an engine.
[0039] For convenience in explanation and accurate definition in
the appended claims, the terms "upper", "lower", "inner", "outer",
"up", "down", "upwards", "downwards", "front", "rear", "back",
"inside", "outside", "inwardly", "outwardly", "internal",
"external", "inner", "outer", "forwards", and "backwards" are used
to describe features of the exemplary embodiments with reference to
the positions of such features as displayed in the figures. It will
be further understood that the term "connect" or its derivatives
refer both to direct and indirect connection.
[0040] Furthermore, the term of "fixedly connected" signifies that
fixedly connected members always rotate at a same speed.
Furthermore, the term of "selectively connectable" signifies
"selectively connectable members rotate separately when the
selectively connectable members are not engaged to each other,
rotate at a same speed when the selectively connectable members are
engaged to each other, and are stationary when at least one of the
selectively connectable members is a stationary member and
remaining selectively connectable members are engaged to the
stationary member".
[0041] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the present invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described to explain certain principles of the
present invention and their practical application, to enable others
skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the present invention be defined by the Claims appended
hereto and their equivalents.
* * * * *