Vehicle Drivetrain Power Split With Dual Electromagnetic Machines
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Solution Overview
Problem
Existing vehicle transmissions lack efficient mechanisms for optimizing power distribution and energy management across multiple modes of operation, particularly in vehicles equipped with electromagnetic devices, leading to suboptimal fuel efficiency and power balance.
Innovation Solution
A vehicle drive train system incorporating a transmission with two electromagnetic devices and a planetary gear set configuration that allows for three modes of operation, enabling power splitting, reduction, and torque amplification, with control strategies to manage engine and electromagnetic device interactions to optimize power delivery and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional transmission system is used without electromagnetic devices, then the structure is simpler, but fuel efficiency and power balance are suboptimal
Solution Approach 1:
The patent combines electromagnetic devices with the transmission system to create an integrated power management architecture. The electromagnetic devices are merged with the planetary gear set and transmission components, allowing simultaneous mechanical power transmission and electrical energy management within a single system structure.
Solution Approach 2:
The transmission system is designed to perform multiple functions: mechanical power transmission, electrical energy generation, electrical energy storage, and power distribution. The electromagnetic devices enable the transmission system to function both as a mechanical gearbox and as an electrical power management system, optimizing fuel efficiency across different operating conditions.
2Use of energy by moving object
If electromagnetic devices are added to optimize power distribution, then fuel efficiency improves, but device complexity increases
Solution Approach 1:
The transmission system is segmented into distinct functional modules: planetary gear sets for mechanical power distribution, electromagnetic devices for electrical energy conversion, and control systems for power management. This segmentation allows each component to be optimized independently while working together to achieve overall power balance.
Solution Approach 2:
The electromagnetic devices act as intermediaries between the mechanical powertrain and the electrical energy storage system. They convert mechanical energy to electrical energy during braking or excess power conditions, and can convert electrical energy back to mechanical energy when needed, facilitating smooth power balance without direct mechanical-electrical coupling.
3Productivity
If the engine drives the electromagnetic device to provide electrical energy, then power distribution is optimized, but energy storage charging is prevented
Solution Approach 1:
The system dynamically switches between different operational modes based on real-time conditions: when the engine drives the electromagnetic device, the system operates in power delivery mode to maximize immediate power efficiency; when excess electrical energy is available, the system switches to charging mode to store energy. This dynamic adaptability resolves the contradiction by making the energy flow direction conditional rather than fixed.
Solution Approach 2:
The control system monitors and adjusts key parameters such as engine speed, electromagnetic device operating point, and energy storage state of charge. By changing these parameters dynamically, the system can transition between providing electrical energy to the transmission and charging the energy storage device, optimizing both power delivery efficiency and energy utilization at different moments.
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
The system achieves improved fuel efficiency and power balance by dynamically switching between modes, ensuring optimal power distribution and reducing energy waste, particularly in vehicles with electromagnetic devices.
Implementation Method 1
a first electromagnetic device EM1 coupled to the transmission T1 and a second electromagnetic device EM2 coupled to the transmission T1
Data Source
AI summary
A vehicle is operable in three modes of operation. The vehicle includes a first electromagnetic device, a second electromagnetic device electrically coupled to the first electromagnetic device, and an engine coupled to the first electromagnetic device and configured to drive the first electromagnetic device to provide electrical energy. In each of the three modes of operation, whenever the engine drives the first electromagnetic device to provide the electrical energy, the first electromagnetic device operates without providing the electrical energy to an energy storage device.