Hybrid Vehicle Energy Overload Control via Kinetic Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hybrid vehicle systems fail to smoothly reduce the maximum power of the electric machine during energy overload, leading to sudden transitions in usable power, which affects the vehicle's dynamic performance and energy balance.
Innovation Solution
A method that estimates the recovery potential from the vehicle's kinetic energy to limit the usable energy for acceleration, combining recoverable kinetic energy during deceleration and energy recharged by the internal combustion engine, ensuring a balanced energy supply to maintain robust dynamic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the maximum power of the electric machine is limited to the energy storage capacity alone, then the system ensures energy balance, but it fails to take advantage of the vehicle's condition and cannot achieve smooth power transitions
Solution Approach 1:
The system performs preliminary estimation of recoverable kinetic energy based on current vehicle speed and calculates the energy that can be recovered during deceleration. This advance calculation allows the system to proactively determine usable energy limits before energy overload occurs, enabling smooth power transitions while maintaining energy balance.
2Reliability
If the system uses fixed energy storage capacity limits, then it ensures energy balance, but it causes abrupt transitions in usable power and affects dynamic performance
Solution Approach 1:
The system dynamically adjusts the usable energy limit by continuously monitoring vehicle speed and calculating recoverable kinetic energy. Instead of using a fixed energy storage capacity limit, the system adapts the power limit in real-time based on vehicle operating conditions, ensuring smooth transitions and maintaining dynamic performance while preserving energy balance.
3Power
If the system allows maximum power during energy overload, then acceleration performance is improved, but energy balance is compromised and recovery potential is exceeded
Solution Approach 1:
The system changes the parameter used for power limiting from fixed energy storage capacity to dynamic recoverable kinetic energy based on vehicle speed. By calculating the energy that can be recovered during deceleration at current speed conditions, the system allows maximum power during energy overload when recoverable energy is sufficient, while preventing energy balance violations when recovery potential is limited.
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 approach allows for gradual power reduction during energy overload, optimizing acceleration performance by ensuring that the energy used does not exceed recoverable amounts, maintaining maximum power application until energy thresholds are met, thus enhancing the vehicle's acceleration capability and reducing consumption.
Implementation Method 1
The reversible converter 50 supplies energy to the electrical storage unit, particularly when the vehicle is decelerating
Implementation Method 2
An electrical storage unit 11 consisting of a battery, supercapacitors, or any other element capable of reversibly storing electrical energy
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The method involves indicating an instantaneous speed value of a vehicle, and indicating energy overload demand detection for estimating recovery potential with respect to the indicated speed value. The absence of the energy overload demand is indicated to estimate recharged energy in an electrical storage i.e. battery. Energy limit usable for the energy overload with the sum of the recovery potential and the recharged energy, is generated after the indication of the value and the energy overload demand detection. An independent claim is also included for a device for controlling an energy overload in a hybrid vehicle system.