Vehicle Posture Control With Single-Pedal Deceleration Tuning
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Solution Overview
Problem
Conventional vehicle posture control methods fail to appropriately control deceleration when a single pedal is used for acceleration, deceleration, and steering operations, leading to discomfort due to excessive deceleration or acceleration not matching the driver's request.
Innovation Solution
A control method for a vehicle that utilizes a steering angle sensor and an accelerator sensor to adjust deceleration based on the accelerator pedal depression amount, reducing deceleration when the pedal is partially depressed and increasing it when fully depressed, to match the driver's intended vehicle posture during turning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional vehicle posture control is used with brake pedal operation, then deceleration can be controlled for vehicle posture stability, but the system cannot appropriately control deceleration when single pedal operation is used
Solution Approach 1:
The control system dynamically adjusts the deceleration control strategy based on the detected accelerator pedal depression amount. When single pedal operation is detected (accelerator pedal depression amount below threshold), the system switches to a different control mode that appropriately manages deceleration during turning operations, ensuring reliable control across different operating conditions.
Solution Approach 2:
The system changes the control parameters based on the accelerator pedal depression amount. By monitoring this parameter and comparing it against a threshold value, the system identifies single pedal operation mode and adjusts the deceleration control accordingly, enabling appropriate control for different operational scenarios.
2Stability of the object's composition
If deceleration is added to control vehicle posture during turning, then vehicle stability is improved, but driver discomfort occurs due to excessive deceleration not matching driver's request
Solution Approach 1:
The control system continuously monitors the accelerator pedal depression amount and uses this feedback to adjust the deceleration control during turning operations. By comparing the actual pedal position with the control requirements, the system modulates the deceleration magnitude to maintain vehicle stability while avoiding excessive deceleration that would cause driver discomfort.
Solution Approach 2:
The system applies partial deceleration control by adjusting the deceleration magnitude based on the accelerator pedal depression amount. When single pedal operation is detected, the system applies a reduced or modified deceleration compared to brake pedal operation, providing just enough deceleration to maintain stability without causing the discomfort associated with excessive deceleration.
Data Source
AI summary
In a control method for a vehicle and a vehicle controller that add deceleration to a vehicle so as to control a vehicle posture when a turning operation of a steering system is performed, the deceleration is appropriately set on the basis of an operation of a single pedal. The control method for the vehicle includes: a step of adding the deceleration that corresponds to an accelerator pedal depression amount to a vehicle 1 when the accelerator pedal depression amount is smaller than a specified value A1 that is larger than 0; a step of determining whether the turning operation of the steering system is performed on the basis of a steering angle detected by a steering angle sensor 8; a step of adding the deceleration to the vehicle 1 so as to control the vehicle posture when it is determined that the turning operation of the steering system is performed; and a step of setting the deceleration added to the vehicle to a smaller value when the accelerator pedal depression amount is smaller than the specified value and is a first value than when the accelerator pedal depression amount is smaller than the specified value and is a second value (>the first value).