Hybrid Coupling Mechanism for Motor Vehicle Powertrain
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Solution Overview
Problem
Current hybrid vehicle systems face inefficiencies due to the need for complex structures and high power requirements, particularly in series hybrid systems where all power passes through a generator and motor, leading to mechanical-electrical and electrical-mechanical transformations that reduce overall efficiency and increase weight and volume.
Innovation Solution
A hybrid coupling mechanism incorporating a fuel-driven mechanism, single row planetary gear mechanism, clutch, intermediate connecting shaft, compound planetary gear mechanism, and two electric driving mechanisms allows for adjustable speed ratios and multiple driving modes, optimizing engine performance and reducing motor size and weight by using two motors and a planetary gear system to supplement engine power and adjust speed ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a series hybrid system is used where all power passes through generator and motor, then the structure is simple and layout is flexible, but the motor volume and weight increase, and overall system efficiency decreases due to mechanical-electrical and electrical-mechanical transformations
Solution Approach 1:
The power transmission path is segmented into multiple independent channels: a mechanical transmission channel for direct engine power transmission, and an electric channel for motor assistance. This segmentation allows different power transmission paths to coexist, reducing the burden on the motor while maintaining structural simplicity.
Solution Approach 2:
A power coupling device is introduced as an intermediary mechanism that coordinates between the engine and motor. This coupling device enables seamless power combination from both sources without requiring all power to pass through the motor, thereby improving overall system efficiency while maintaining flexibility.
2Adaptability or versatility
If a parallel hybrid system with two separate subsystems is used, then the mechanical transmission can adjust speed and the motor-battery system adjusts power, but the structure becomes more complicated and cost increases
Solution Approach 1:
The mechanical transmission system and electric motor system are merged into a unified power coupling mechanism. This integration allows both systems to work together through a single coordinated structure rather than requiring completely separate subsystems, reducing overall complexity while maintaining versatile power adjustment capabilities.
Solution Approach 2:
The power coupling device serves multiple functions: it enables mechanical power transmission, electric power transmission, and coordinated hybrid operation. This multi-functionality eliminates the need for separate dedicated systems for each mode, simplifying the overall structure while maintaining adaptability.
3Productivity
If a continuously variable transmission is used to provide infinite speed ratios, then the internal combustion engine can work within the optimum speed range and fully utilize maximum power, but the structure becomes more complicated
Solution Approach 1:
The complex mechanical continuously variable transmission is replaced with an electrically-controlled power coupling system. This substitution uses electronic control and electromagnetic mechanisms instead of complex mechanical variable ratio mechanisms, achieving continuous speed ratio adjustment while significantly simplifying the transmission structure.
Solution Approach 2:
The system achieves continuous speed ratio adjustment by dynamically changing the operational parameters of the power coupling device, such as the engagement state of clutches and the torque distribution between engine and motor. This parameter-based control enables continuous variability without complex mechanical structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances system efficiency, improves fuel efficiency, optimizes engine performance, reduces the volume and weight of the generator, and enables seamless mode switching without power interruption, achieving various driving modes including pure electric and hybrid modes.
Implementation Method 1
a first planetary gear mechanism including a first sun gear, a first planetary carrier, a first planetary gear and a first gear ring; the first planetary carrier is connected to the first input shaft, the first planetary gear meshes with the first sun gear, and the first gear ring is connected to the second input shaft
Implementation Method 2
a clutch corresponding to the first input shaft
Data Source
AI summary
Some embodiments of the present disclosure provide a hybrid coupling mechanism and a motor vehicle. The hybrid coupling mechanism includes a fuel driven mechanism, a single row planetary gear mechanism, a clutch, an intermediate connecting shaft structure, a compound planetary gear mechanism, a first electric driving mechanism, a second electric driving mechanism and a power output mechanism, wherein the fuel driven mechanism, the first electric driving mechanism and the second electric driving mechanism are connected for output by the single row planetary gear mechanism and the compound planetary gear mechanism, and finally, power output is carried out by the power output mechanism.