Vehicle Drivetrain Power Split Without Battery Charging
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Solution Overview
Problem
Current electromechanical infinitely variable transmissions for vehicles lack efficient energy management and operational flexibility, particularly in modes where electrical energy is not stored, leading to suboptimal performance and fuel efficiency.
Innovation Solution
A vehicle system incorporating two electromagnetic devices and an engine, where the engine drives one electromagnetic device to provide electrical energy without storing it, and a motor/generator configuration that allows for three operational modes with power splitting and torque amplification through planetary gear sets, enabling efficient energy distribution and propulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the engine drives the electromagnetic device to provide electrical energy without storing it, then fuel efficiency is improved, but operational flexibility is reduced
Solution Approach 1:
The system dynamically switches between three operational modes (first mode with energy storage device charged, second mode with energy storage device not charged and motor/generator acts as generator, third mode with motor/generator acting as motor) based on real-time driving conditions and energy availability, allowing the electromagnetic device to adapt its function between motor and generator roles while maintaining fuel efficiency
2Device complexity
If the motor/generator operates without providing electrical energy to an energy storage device, then device complexity is reduced, but energy management efficiency is worsened
Solution Approach 1:
The motor/generator serves itself by directly providing electrical energy to the electromagnetic device without requiring an intermediate energy storage device, eliminating the charging/discharging cycle and associated energy losses while reducing system complexity
3Power
If power splitting and torque amplification through planetary gear sets are implemented, then propulsion capabilities are enhanced, but device complexity is increased
Solution Approach 1:
The planetary gear set merges the mechanical power from the engine with the electrical power from the motor/generator, combining both power sources to provide torque amplification and enhanced propulsion capabilities while using a single integrated gear mechanism rather than separate systems
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 efficient energy management and operational flexibility by allowing the electromagnetic devices to operate without energy storage, enhancing fuel efficiency and propulsion capabilities across various vehicle modes.
Implementation Method 1
a first electromagnetic device EM1, a second electromagnetic device EM2
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.