Power transmission device for hybrid vehicle
a technology for hybrid vehicles and transmission devices, applied in mechanical devices, transportation and packaging, gearing, etc., can solve the problems of low possible improvement of fuel efficiency, parallel power transmission devices, and insufficient power distribution of engine power to the driving wheel according to the speed of the vehicle, so as to achieve the effect of improving fuel efficiency
Active Publication Date: 2014-11-27
HYUNDAI MOTOR CO LTD
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Benefits of technology
The present invention is a power transmission device for hybrid vehicles that improves fuel efficiency compared to existing power trains. It uses a Ravigneaux gear train with a single pinion planetary gear and a double pinion planetary gear including a carrier obtained by combining two pinion gears and two or more clutches. The invention allows for the selection of two or more kinds of engine fixing gear stages using two clutches, which improves fuel efficiency in parallel driving that requires engine power.
Problems solved by technology
However, the conventional series-parallel power transmission device described above has at least the following disadvantage.
Therefore, there is little possible improvement of fuel efficiency as compared to a conventional vehicle.
In other words, the gear train disposed on the power transmission path through which the output shaft of the engine is connected to the final output gear, i.e., the input / output path of engine power, is combined into a structure in which the third gear and the output gear are simply connected in addition to the spur gear-type second gear, and therefore, the engine power is not appropriately distributed to the driving wheel according to the speed of the vehicle.
Accordingly, it is difficult to attain improvements of fuel efficiency.
Method used
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[0040]Hereinafter reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is 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.
[0041]It is understood that the term “vehicle” or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and inclu...
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A power transmission device for a hybrid vehicle includes a series-parallel type power transmission path capable of varying an engine output for each driving mode, using a Ravigneaux gear train and two or more clutches, to improve the fuel efficiency of the hybrid vehicle. The power transmission device includes two or more kinds of engine fixing gear stages capable of distributing the output of the engine to a driving wheel, which are implemented using the Ravigneaux gear train, in which a single pinion planetary gear is integrally configured with a double pinion planetary gear including a carrier obtained by combining two pinion gears with the two or more clutches.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims under 35 U.S.C. §119(a) the benefit of Korean Patent Application No. 10-2013-0057580 filed May 22, 2013, the entire contents of which are incorporated herein by reference.BACKGROUND[0002](a) Technical Field[0003]The present invention relates to a power transmission device for a hybrid vehicle. More particularly, the present invention relates to a power transmission device for a hybrid vehicle, which implements a series-parallel type power transmission path capable of varying an engine output for each driving mode, preferably using a Ravigneaux gear train and two or more clutches, thereby improving the fuel efficiency of the hybrid vehicle.[0004](b) Description of the Related Art[0005]In general, a power transmission device for a hybrid vehicle can be configured in various combinations, using an engine and a motor, where the power transmission device typically includes a serial power train, a parallel power train, a ...
Claims
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IPC IPC(8): B60K6/547
CPCY10S903/902B60K6/547B60K6/365B60K6/442F16H2200/2023Y02T10/62B60K6/22B60K6/26B60K17/02B60K17/04
Inventor HUH, JUN HOISUH, BUHM JOOKIM, SEOK JOON
Owner HYUNDAI MOTOR CO LTD