Hybrid Vehicle Charge Control Adapting to Speed
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Solution Overview
Problem
Conventional hybrid vehicles charge batteries rapidly regardless of driving conditions, leading to decreased charge efficiency and increased fuel consumption.
Innovation Solution
A charge control apparatus and method that adjusts battery charging based on vehicle speed, using various modes such as idle charge, engine torque charge, and regenerative braking to optimize charging speed and efficiency according to running states, including stop, low speed, intermediate speed, and high speed conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid battery charging is performed regardless of driving conditions, then charging speed is improved, but charge efficiency decreases and fuel consumption increases
Solution Approach 1:
The patent applies dynamics by making the charging strategy adaptive rather than static. The vehicle controller dynamically adjusts charging parameters based on real-time driving conditions including vehicle speed, accelerator pedal position, and brake pedal position. This allows the system to optimize charge efficiency by selecting appropriate charging modes (engine torque charge, running charge, regenerative braking) according to current operational state, thereby improving fuel consumption without sacrificing charging speed when conditions permit.
Solution Approach 2:
The patent implements parameter changes by modifying charging control parameters based on driving conditions. The system changes key parameters such as engine torque output, motor torque assistance, and regenerative braking intensity according to vehicle speed and driver input. This enables the charging system to operate at optimal efficiency points across different driving scenarios, resolving the contradiction between fast charging and fuel economy.
2Speed
If rapid battery charging is performed regardless of driving conditions, then charging speed is improved, but charge efficiency decreases
Solution Approach 1:
The system dynamically selects charging modes based on real-time vehicle state. At low speeds or during deceleration, regenerative braking charging is activated to capture energy. At medium speeds with appropriate accelerator position, engine torque charge mode provides efficient charging. At high speeds or when rapid charging is needed and conditions permit, the system can engage higher power charging modes. This dynamic adaptation maintains high charge efficiency across varying driving conditions while still achieving fast charging when appropriate.
Solution Approach 2:
The controller adjusts charging parameters including engine torque, motor torque, and regenerative braking force based on vehicle speed and driver input. By changing these parameters adaptively, the system optimizes the balance between charging power and charge efficiency, ensuring that rapid charging is achieved only when it does not compromise efficiency, thereby resolving the contradiction between charging speed and charge efficiency.
3Ease of operation
If charging mode is not adapted to vehicle running state, then charging simplicity is maintained, but overall system efficiency decreases
Solution Approach 1:
The charging system operates autonomously based on pre-programmed logic that automatically selects appropriate charging modes according to detected driving conditions. The vehicle controller continuously monitors vehicle speed, accelerator pedal position, and brake pedal position, then independently determines the optimal charging strategy without requiring driver intervention. This self-service approach maintains operational simplicity for the user while achieving significant fuel savings through intelligent, condition-based charging mode selection.
Solution Approach 2:
The system employs feedback control by continuously monitoring driving conditions and adjusting charging parameters in response. The vehicle controller receives feedback from sensors measuring vehicle speed, accelerator pedal position, and brake pedal position, then uses this information to dynamically select and adjust charging modes. This closed-loop feedback mechanism enables the system to automatically optimize fuel consumption without complicating the user interface or requiring complex driver decisions.
Data Source
AI summary
A charge control apparatus of a hybrid vehicle is provided. The apparatus adjusts charge of a hybrid vehicle based on a vehicle running state when entering a charge mode. The charge control apparatus includes an engine clutch that is disposed between an engine and a first motor to selectively connect the engine and the first motor and a battery that provides a voltage to the first motor. A data detection unit detects driving data for charging the battery and a vehicle controller generates an average speed for a predetermined time using a vehicle speed of the driving data. In addition, the controller sets a charge mode based on the average speed and charges the battery using the charge mode.