Planetary gear train of automatic transmission for vehicle
a technology of automatic transmission and gear train, which is applied in the direction of mechanical equipment, gearing, transportation and packaging, etc., can solve the problems of deteriorating installationability, production cost, weight and/or power flow efficiency, and long time, and achieve the effect of improving fuel efficiency and performance of the vehicl
Inactive Publication Date: 2019-04-25
HYUNDAI MOTOR CO LTD +1
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is directed towards providing an automatic transmission with a planetary gear train that allows for ten forward speeds. This results in better performance and fuel efficiency of the vehicle. Additionally, the multi-stages of the gear train improve driving stability, maximize engine driving efficiency, and improve power delivery performance and fuel consumption.
Problems solved by technology
Research on realizing more shift-stages of an automatic transmission are undertaken to achieve enhancement of fuel consumption and better drivability, and recently, increase of oil price is triggering a hard competition in enhancing fuel consumption of a vehicle.
To achieve more shift stages for an automatic transmission, the number of parts is typically increased, which may deteriorate installability, production cost, weight and / or power flow efficiency.
An automatic transmission of eight or more shift-stages typically includes three to four planetary gear sets and five to seven engagement elements (frictional elements), and may easily become lengthy, deteriorating installability.
However, such an arrangement may not be widely applicable, and using dog clutches may easily deteriorate shift-feel.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026]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 invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
[0027]Hereinafter, an exemplary embodiment of the present invention will be described more specifically with reference to drawings.
[0028]The drawings and description are to be regarded as illustrative in nature and not restrictive, and like reference numerals designate like elements throughout the specification.
[0029]In the follow...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A planetary gear train may include input and output shafts, first to third planetary gear sets respectively having first to third, fourth to sixth, and seventh to ninth elements, a first shaft connected to the second element and the input shaft, a second shaft connected to the sixth and eighth elements and the output shaft, a third shaft connected to the third and seventh elements, a fourth shaft connected to the fourth element, and a plurality of shafts each selectively connecting a corresponding element to a transmission housing, the corresponding element being an element of the first, second and third planetary gear sets which is not interconnected.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application No. 10-2017-0135818 filed on Oct. 19, 2017, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to an automatic transmission for a vehicle.Description of Related Art[0003]Research on realizing more shift-stages of an automatic transmission are undertaken to achieve enhancement of fuel consumption and better drivability, and recently, increase of oil price is triggering a hard competition in enhancing fuel consumption of a vehicle.[0004]In this sense, research on an engine has been undertaken to achieve weight reduction and to enhance fuel consumption by so-called downsizing research on an automatic transmission has been performed to simultaneously provide better drivability and fuel consumption by achieving more shift stages.[0005]To achieve more shift s...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/2048F16H3/62F16H2200/201F16H2200/0069
Inventor JI, SEONGWOOKHWANG, SEONG WOOKPARK, JUHYEONCHO, WONMINKWON, HYUN SIKYOO, ILHANKOOK, JAE CHANGKIM, KI TAE
Owner HYUNDAI MOTOR CO LTD