Dual-Motor Powertrain Cooling With Split Stator and Rotor Paths
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Solution Overview
Problem
Conventional powertrain cooling systems face inefficiencies due to the generation of varying heat levels in stators and rotors, leading to reduced efficiency and complexity in dual-drive vehicles, with increased requirements for cooling oil and complex pipeline structures.
Innovation Solution
A powertrain system with separate coolant paths for stators and rotors, utilizing a single heat exchanger and dual pumps to optimize cooling, incorporating filters to prevent impurity damage, and dynamically adjusting pump speeds based on temperature for efficient cooling and lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dual-drive powertrain with dual motors and dual gearboxes is used to increase power output, then the power and torque are improved, but the quantity of components is doubled and the cooling requirement becomes more complex
Solution Approach 1:
The patent merges the cooling systems of dual motors and dual gearboxes into a single integrated cooling system. One coolant circulation system serves all four components (two motors and two gearboxes), reducing the number of separate cooling circuits from what would traditionally be required and simplifying the overall cooling architecture while maintaining adequate cooling for all powertrain components
2Temperature
If separate cooling paths are implemented for stators and rotors to optimize cooling efficiency, then cooling effect is improved, but the pipeline arrangement becomes more complex
Solution Approach 1:
The patent segments the cooling paths for stators and rotors within the integrated cooling system. By providing separate cooling circuits for stators and rotors while maintaining a unified coolant circulation system, the design achieves optimized cooling for each component type without requiring completely separate cooling systems, thus balancing cooling efficiency with system simplicity
3Temperature
If more cooling oil is used to cool dual motors and dual gearboxes, then cooling capacity is improved, but the requirement for cooling oil quantity is doubled and processing becomes difficult
Solution Approach 1:
The patent creates a universal cooling system where a single coolant circulation system serves multiple functions by cooling all four components (two motors and two gearboxes). This multi-functional approach eliminates the need to double the cooling oil quantity and associated piping infrastructure, as the integrated system efficiently distributes coolant to all powertrain components through a unified architecture
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
Enhances cooling efficiency by optimizing coolant distribution, reducing system complexity, and minimizing energy consumption while preventing component damage, thus maintaining powertrain performance.
Implementation Method 1
a heat exchanger, where the heat exchanger is connected to the first pump, a first flow path, where the first flow path is connected to an outlet of the first pump, and the first flow path is used to supply the coolant to the first stator and the second stator through the heat exchanger
Data Source
AI summary
A powertrain includes a reservoir configured to store coolant; a first drive motor, where the first drive motor includes a first stator and a first rotor; a second drive motor, where the second drive motor includes a second stator and a second rotor; a first pump and a second pump, where an inlet of the first pump is coupled to the reservoir, and an inlet of the second pump is coupled to the reservoir; a heat exchanger, where the heat exchanger is coupled to the first pump; a first flow path, where the first flow path is coupled to an outlet of the first pump, and the first flow path is used to supply the coolant to the first stator and the second stator through the heat exchanger.