Power transmission apparatus for a vehicle

a technology for power transmission and vehicle, applied in mechanical devices, transportation and packaging, gearing, etc., can solve the problems of large burning of dct clutches, safety problems of dct, and achieve the effect of improving fuel consumption and acceleration performan

Active Publication Date: 2019-05-02
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent is about a power transmission system for a vehicle that includes a dual clutch transmission and three synchronizers. The system has the ability to shift between four forward speeds and one reverse speed. The system also includes a motor / generator that allows for driving in both electric and continuously variable automatic transmission modes, which improves fuel efficiency and acceleration performance.

Problems solved by technology

However, the DCT has large clutch burning and energy loss due to clutch slip at the time of departure.
The DCT also has a safety problem due to excessive backward movement caused by clutch slip at the time of hill climbing departure.

Method used

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  • Power transmission apparatus for a vehicle
  • Power transmission apparatus for a vehicle

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Embodiment Construction

[0028]It is desired to develop a power transmission apparatus capable of improving fuel consumption and acceleration performance and reducing exhaust gas by adding one planetary gear set and a motor / generator to enable driving in an electric vehicle (EV) mode and an electronic continuously variable automatic transmission (e-CVT) mode. In one example, development of a high efficiency power transmission apparatus that achieves at least four forward speeds and one reverse speed is desirable. In this aspect, the present disclosure relates to a power transmission apparatus for a vehicle. The disclosed power transmission apparatus may improve efficiency and convenience by implementing fixed shift stages of four forward speeds and one reverse speed having a dual clutch transmission (DCT) structure. The disclosed power transmission apparatus may also improve fuel efficiency and decrease exhaust gas by stopping the operation of an engine using fossil fuel and instead using a motor / generator ...

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Abstract

A power transmission apparatus for a vehicle may include: a first, second, third, and fourth input shaft; an output shaft; an idle shaft; a fixed transmission performing shifts to fixed shift stages depending on gear ratios of four change gear trains; and a torque assist driving and electronic continuously variable automatic transmission performing a torque assist for a torque input from the fixed transmission and performing electric vehicle driving and electronic continuously variable automatic transmission functions to output the torque through the output shaft. The disclosed power transmission apparatus implements fixed shift stages of four forward speeds and one reverse speed in a dual clutch transmission (DCT) structure that uses three synchronizers. The disclosed power transmission apparatus improves fuel consumption and acceleration performance by adding one planetary gear set and a motor / generator to enable driving in an electric vehicle (EV) mode and an electronic continuously variable automatic transmission (e-CVT) mode.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2017-0144496 filed in the Korean Intellectual Property Office on Nov. 1, 2017, the entire contents of which are incorporated herein by reference.BACKGROUND(a) Field of the Disclosure[0002]The present disclosure relates to a power transmission apparatus for a vehicle. More particularly, the present disclosure relates to a power transmission apparatus for a vehicle having a dual clutch transmission (DCT) structure that uses three synchronizers, one planetary gear set, and a motor / generator to enable driving in an electric vehicle (EV) mode and an electronic continuously variable automatic transmission (e-CVT) mode.(b) Description of the Related Art[0003]Environmentally-friendly technology in vehicles is a key to survival for the future vehicle industry. Automakers have made every effort to develop environmentally-friendly vehicles that comply with environ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B60K6/543F16H3/72F16H3/00F16H3/091B60K6/365B60K6/48B60K6/547F16H37/04F16H37/08
CPCB60K6/543B60K2006/4816F16H3/006F16H3/091B60K6/365B60K6/48B60K6/547F16H37/046F16H37/0806F16H2200/0043F16H2200/2005F16H2200/2033B60Y2200/92Y10S903/91Y10S903/918Y10S903/919F16H3/725B60K6/36Y02T10/62B60K6/24B60K6/26B60K6/38B60K17/02B60Y2200/91F16H3/72F16H2200/2038
InventorCHO, WONMINHWANG, SEONG WOOKPARK, KIJONGJI, SEONGWOOKKIM, KI DONGKWON, HYUN SIKJANG, CHEOL HOKOOK, JAE CHANGKIM, KI TAE
OwnerHYUNDAI MOTOR CO LTD