Hybrid Powertrain Clutch Layout for Compact Multi-Mode Drive
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Solution Overview
Problem
Existing hybrid power systems have low integration, large size, complex structure, and poor fuel-saving effects due to inadequate decoupling of engine and wheels, leading to mode-switching impacts and inefficient operation modes.
Innovation Solution
A hybrid power system with a compact, integrated design featuring first and second clutches disposed in the radial direction of a first motor's output shaft, allowing for high integration, decoupling of the engine from wheels, and supporting multiple operating modes through three power sources (engine, first and second motors) with a power output assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional hybrid power systems are designed with separate components, then each component can be optimized independently, but the overall system size becomes large and integration is low
Solution Approach 1:
The patent merges the engine and first motor sharing a common output shaft, and integrates two clutches (first and second clutches) into a single radial space. This combining of components that traditionally would be separate reduces the overall system volume while maintaining functional independence through the clutch mechanisms.
Solution Approach 2:
The patent employs a nested arrangement where the first clutch and second clutch are disposed in the radial direction of the first motor's output shaft, with the first clutch closer to the output shaft and the second clutch on the outer side. This radial nesting allows multiple clutch assemblies to occupy overlapping radial spaces, significantly reducing the axial and radial footprint of the power transmission system.
2Adaptability or versatility
If engine and wheels are decoupled with traditional mechanisms, then mode switching is possible, but mode-switching impacts occur and driving comfort deteriorates
Solution Approach 1:
The patent uses two clutch assemblies as intermediary devices between the power sources (engine and motors) and the wheels. The first clutch couples the engine to the common output shaft, while the second clutch couples the first motor to the same output shaft. These clutch intermediaries enable smooth engagement and disengagement of different power sources without direct mechanical impact, allowing mode switching while maintaining driving comfort.
3Adaptability or versatility
If multiple power sources are integrated in conventional layouts, then power transmission is achieved, but spatial requirements are large and integration is poor
Solution Approach 1:
The patent transitions from conventional axial stacking of clutches to a radial arrangement where the first and second clutches are disposed in the radial direction of the first motor's output shaft. This dimensional change from axial to radial positioning allows the multiple clutch assemblies to share the same axial space, significantly reducing the overall spatial requirements while maintaining support for multiple operating modes through the three power sources.
Data Source
AI summary
Provided is a hybrid power system. The hybrid power system includes a first clutch, a second clutch, an engine, a first motor, a second motor, and a power output assembly, wherein two ends of the first clutch are respectively connected to the first motor and the engine; two ends of the second clutch are respectively connected to the first clutch and the power output assembly; the second motor is connected to the power output assembly; wherein the first clutch and the second clutch are disposed in a radial direction of an output shaft of the first motor, and the second clutch is disposed on a side, away from the output shaft of the first motor, of the first clutch.