Power transmission unit and transmission control method of hybrid driving system

Abstract

The invention provides a power transmission unit for an automobile hybrid driving system, which is characterized in that a clutch is connected with an output shaft of an integrated starter-generator and one end of an output shaft of a master drive motor respectively, the other end of the output shaft of the master drive motor is provided with an epicyclic reduction gear unit, main reduction gears are respectively arranged on the output shaft of the master drive motor as well as between the epicyclic reduction gear unit and the clutch, and the clutch cover assembly of the clutch is arranged in a mode of facing to one side of the integrated starter-generator. In the invention, the power transmission unit adopts a compact design, is manufactured by an integration process and can be matched with the inner structure of an electrically driven unit, thus greatly simplifying the manufacture process and the assembly process of hybrid vehicles, making full use of the space between the inner clutch of the electrically driven unit and the integrated starter-generator under the premise of not changing the clutch performance of the clutch and enabling the inner structure of the electrically driven unit to be more compact.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, especially a hybrid drive system of a plug-in hybrid electric vehicle, in particular to a power transmission unit in the hybrid drive system. Background technique [0002] Today, when energy saving and environmental protection have become the mainstream of the development of the automobile industry, hybrid electric vehicles have become the key core technology for the vigorous development of automobile manufacturers in various countries. Among them, the plug-in hybrid solution, as the most fuel-efficient hybrid solution other than pure electric, is being respected by major manufacturers. The plug-in hybrid is mainly composed of a relatively small-displacement engine and one or two electric motors. Generally, the electric motor is responsible for achieving pure electric power output and braking energy recovery at low and medium speeds, and realizing engine power output when needed. Functions such as st...

AI Technical Summary

Problems solved by technology

[0008] In view of the defects in the prior art that the power cannot be efficiently utilized and the overall volume of the power transmission unit is still relatively large, the purpose of the present invention is to provide a simple structure and high efficiency by resetting the internal structure of the power transmission unit of the hybrid drive system compact power transfer unit

Images