Vehicle Torque Control for Slope-Aware Acceleration Limits
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Solution Overview
Problem
Existing speed limit control systems, such as MSLA, fail to effectively manage acceleration on sloped roads, particularly when a rear-facing car seat is installed, leading to potential vehicle rollback and discomfort for passengers, especially infants, due to inadequate consideration of passenger and slope information.
Innovation Solution
A vehicle with a torque calculation controller that determines an acceleration limit based on passenger information and slope, calculating disturbance torque and output torque to limit acceleration, ensuring the vehicle does not roll back while minimizing passenger discomfort by adjusting the torque generated by the drive source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If scaling control is performed to minimize passenger discomfort due to acceleration, then passenger comfort is improved, but the vehicle may not be capable of climbing uphill roads and may roll back
Solution Approach 1:
The system dynamically changes the acceleration limit parameter based on detected road slope and passenger information. When a rear-facing car seat is detected and the vehicle is on an uphill slope, the system adjusts the acceleration limit to prevent excessive passenger discomfort while maintaining sufficient vehicle climbing capability by compensating for gravitational effects.
Solution Approach 2:
The system performs preliminary detection of road slope and passenger configuration before acceleration occurs. By detecting the rear-facing car seat and uphill slope condition in advance, the system pre-adjusts the acceleration limit to prevent both passenger discomfort and vehicle rollback, rather than reacting after the problem occurs.
2Object-affected harmful factors
If acceleration limit is reduced to minimize passenger discomfort, then passenger comfort is improved, but vehicle productivity is degraded
Solution Approach 1:
The system dynamically adjusts the acceleration limit parameter based on real-time detection of road slope and passenger information. Instead of using a fixed reduced acceleration limit, the system calculates an optimized limit that accounts for gravitational forces on slopes, maintaining vehicle productivity while protecting passengers.
Solution Approach 2:
The acceleration limit is made dynamic rather than static. The system continuously monitors road slope and passenger configuration, adjusting the acceleration limit in real-time to balance passenger comfort with vehicle performance requirements for different driving conditions.
3Object-affected harmful factors
If scaling control is applied to reduce acceleration effects on rear-facing car seat passengers, then passenger comfort is improved, but the control system complexity increases due to slope compensation requirements
Solution Approach 1:
The system uses feedback from road slope detection and passenger information to automatically adjust the acceleration limit. The control system receives feedback about the driving conditions and passenger configuration, and automatically modifies the acceleration control strategy without requiring complex manual intervention or overly complicated control algorithms.
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 solution effectively limits acceleration on uphill roads, preventing vehicle rollback and reducing passenger discomfort by accurately adjusting torque output, ensuring safe and comfortable travel while maintaining the vehicle's ability to climb slopes.
Implementation Method 1
determining disturbance torque due to a disturbance, other than a drive source of a vehicle, based on at least a slope
Data Source
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AI summary
The present invention relates to an acceleration limit control method comprising: determining an acceleration limit based on information on a passenger, determining a disturbance torque due to a disturbance, other than a drive source of a vehicle, based on at least a slope determining a torque limit satisfying the acceleration limit based on the disturbance torque, and determining an output torque to be generated by the drive source based on the torque limit and a driver's requested torque.