Planetary gear train for an automatic transmission of a vehicle
A technology for planetary gear trains and automatic transmissions, applied in vehicle gearboxes, vehicle components, gear transmissions, etc., can solve problems that are difficult to ensure the linearity of the step ratio, the deterioration of the driving performance of the engine, the driving performance of the engine, the power performance and the fuel economy. Improvement is not very good and other problems, to achieve the effect of improving driving performance
Active Publication Date: 2021-02-09
HYUNDAI MOTOR CO LTD
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Problems solved by technology
[0010] However, since the conventional 8-speed automatic transmission has a gear ratio span of 6.5-7.5 (gear ratio span is an important factor to ensure step ratio linearity), the improvement in power performance and fuel economy may not be very good
[0011] In addition, if the 8-speed automatic transmission has a gear ratio span greater than 9.0, it is difficult to ensure the linearity of the step ratio
Therefore, the driving efficiency of the engine and the drivability of the vehicle may deteriorate
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[0040] The following description is merely exemplary in nature, and is not intended to limit the disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
[0041] Hereinafter, a form of the present disclosure will be described in detail with reference to the accompanying drawings.
[0042] However, in order to clearly describe the form of the present disclosure, parts irrelevant to the description are omitted, and the same reference numerals designate the same or similar elements throughout the specification.
[0043] In the following description, dividing component names into first, second, etc. is to divide the names because the names of the components are the same as each other and the order thereof is not particularly limited. As used herein, "connected" and variations thereof include connections for the transmission of force such as torque, for example, a fi...
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The present disclosure provides a planetary gear train for an automatic transmission of a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting torque; a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element; a second planetary gear set, It includes a fourth rotation element, a fifth rotation element and a sixth rotation element; a third planetary gear set including a seventh rotation element, an eighth rotation element and a ninth rotation element; a fourth planetary gear set including a tenth rotation element A rotation element, an eleventh rotation element, and a twelfth rotation element. The planetary gear train improves power delivery performance and fuel economy and ensures linearity of the step ratio by realizing at least eleven forward speed stages and widening the speed ratio (or gear ratio) with a reduced number of constituent elements used .
Description
[0001] Cross References to Related Applications [0002] This application claims priority and benefits from Korean Patent Application No. 10-2016-0023312 filed on February 26, 2016, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to automatic transmissions for vehicles. More specifically, the present disclosure relates to a planetary gear train for an automatic transmission of a vehicle. Background technique [0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0005] In general, automatic transmissions implementing more speed stages have been developed to improve fuel economy and optimize drivability. [0006] Such an automatic transmission realizing more speed steps is preferable in order to maximize power performance and driving efficiency according to downsizing of the engine. Specifically, we have fou...
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IPC IPC(8): F16H3/62F16H59/02
CPCF16H3/62F16H59/02F16H2200/0065F16H2200/0082F16H2200/2012F16H2200/2046F16H2306/00F16H3/66F16H2200/0073F16H2200/2048
Inventor 黄圣旭金钟洙权贤植朴钟述林箕彬沈烋台鞠再昌赵源珉其他发明人请求不公开姓名
Owner HYUNDAI MOTOR CO LTD