Vehicle Rapid Acceleration Control for Torque and Mode Release
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Solution Overview
Problem
Existing vehicle driving modes fail to provide seamless and efficient instantaneous acceleration, leading to user fatigue and reduced fuel economy, while manual mode conversion can negatively impact motor durability.
Innovation Solution
A rapid acceleration mode system with an input device, storage, and controller that allows users to select and control acceleration levels, deceleration levels, and duration time, informing the user through a notification device, and adjusts motor torque and regenerative braking based on user settings and vehicle state references.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the user depresses hard the accelerator pedal in general driving mode or economy mode, then instantaneous acceleration can be secured, but the user must withstand the reaction force of the pedal and is easily tired due to repeated depressing
Solution Approach 1:
The system dynamically adjusts the accelerator pedal characteristics through rapid acceleration mode. When activated, the controller modifies the pedal's mechanical or electronic characteristics to reduce reaction force while maintaining acceleration capability, transforming the static pedal into a dynamic component that adapts to user needs.
Solution Approach 2:
The rapid acceleration mode acts as an intermediary between the user and the vehicle's acceleration system. Instead of directly transmitting full pedal effort to the motor, the controller mediates the relationship by providing torque assistance or modification, reducing the physical burden on the user while achieving the desired acceleration.
2Speed
If the driving mode is converted to sport mode to secure instantaneous acceleration, then a large torque is generated, but the driving mode is not automatically converted after securing acceleration and fuel economy is reduced
Solution Approach 1:
The rapid acceleration mode implements periodic or temporary high-torque operation rather than continuous sport mode. The mode is activated only when instantaneous acceleration is needed and automatically deactivated afterward, creating a periodic pattern of high-performance operation that minimizes energy waste while maintaining acceleration capability when required.
Solution Approach 2:
The system performs preliminary assessment of vehicle state (battery charge, motor temperature) before activating rapid acceleration mode. This preliminary check ensures that high-torque operation is only initiated when conditions permit, preventing unnecessary energy consumption and automatic mode deactivation when acceleration is no longer needed.
3Force
If the torque limit is continuously released to secure instantaneous acceleration, then a large torque is generated, but a large amount of heat is generated and motor durability is negatively influenced
Solution Approach 1:
The torque limit release is implemented as a temporary, periodic action rather than continuous operation. The controller activates rapid acceleration mode only when needed and automatically deactivates it after a predetermined time or when acceleration objective is achieved, limiting heat generation duration and protecting motor durability.
Solution Approach 2:
The system performs preliminary checks of motor temperature and battery charge state before releasing torque limits. This preliminary assessment prevents torque limit release when motor conditions indicate high heat generation risk, ensuring that large torque is only generated when motor durability is not compromised.
4Speed
If the user selects sport mode to achieve rapid acceleration, then the vehicle sensitively reacts and instantaneous acceleration is increased, but a large torque is generated even at small accelerator pedal input and it is difficult to acquire instantaneous acceleration at the moment wanted
Solution Approach 1:
The system dynamically adjusts torque characteristics based on real-time accelerator pedal input and vehicle state. Unlike static sport mode, the rapid acceleration mode controller continuously adapts torque output to match user intent, providing sensitive reaction only when truly needed while maintaining normal characteristics otherwise, thus preserving acceleration control flexibility.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor accelerator pedal input, vehicle acceleration rate, and user intentions. This feedback allows the controller to distinguish between deliberate acceleration requests and incidental pedal movements, activating rapid acceleration mode only when appropriate and maintaining user control flexibility.
Data Source
AI summary
Disclosed are a rapid acceleration mode system of a vehicle and a method for controlling the same which may provide personalized user options for rapid acceleration. In particular embodiments, the system includes an input device configured to receive a user input regarding whether or not to select a rapid acceleration mode; a storage configured to store at least one of a state reference of a battery and a state reference of a vehicle powertrain; a notification device configured to inform a user whether or not the vehicle enters the rapid acceleration mode; and a controller configured to determine whether or not the vehicle is capable of entering the rapid acceleration mode, and to output whether or not the vehicle is capable of entering the rapid acceleration mode through the notification device.