Powertrain for Hybrid Vehicle

摘要

A hybrid vehicle powertrain may include input shafts, clutches, output shafts, a transmission path selector, a planetary gear unit, and a gear stage forming mechanism. The transmission path selector may bring engagement of a first input shaft with second or third input shaft. The planetary gear unit may have three rotary elements, with motor power or engine power being input via a first or second rotary element and being output with any one of two transmission gear ratios under the control of first or third rotary element in response to engagement of first and second engaging units. The gear stage forming mechanism may be formed by engagement of gear pairs having different transmission gear ratios with second and third input shafts and a first output shaft, and function to transmit the power from the second or third input shaft to the first output shaft while changing a speed by selecting a gear pair in accordance with a vehicle running speed using a gear pair selector.

主权项

1. A hybrid vehicle powertrain, comprising:
a first input shaft and a second input shaft, which are rotatably and concentrically installed and to which a rotating force of an engine is transmitted under control of a first clutch and a second clutch; a third input shaft rotatably and concentrically installed relative to the first input shaft; a transmission path selector that brings engagement of the first input shaft with the second input shaft or with the third input shaft, thereby transmitting a rotating force of the first input shaft to the second input shaft or to the third input shaft; a planetary gear unit which includes first, second and third rotary elements, and to which a rotating force of a motor or the rotating force of the engine is input via the first rotary element or the second rotary element, and from which the input rotating force is output with any one of two transmission gear ratios under control of the first rotary element or the third rotary element in response to engagement of a first engaging unit and a second engaging unit; a first output shaft installed parallel to both the second input shaft and the third input shaft; and a gear stage forming mechanism formed by engagement of a plurality of gear pairs having different transmission gear ratios with the second input shaft, the third input shaft and the first output shaft, and transmitting the rotating force from the second input shaft or from the third input shaft to the first output shaft while changing a speed by selecting a gear pair in accordance with a vehicle running speed using a gear pair selector.