Vehicle Control Device for Smooth Deceleration via Paddle Lever Dynamics
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Solution Overview
Problem
Existing vehicle control systems struggle to decelerate vehicles smoothly according to the driver's intention, as the deceleration rate changes stepwise with the paddle shift switch, making it difficult to achieve desired deceleration.
Innovation Solution
A control device for vehicles that includes a motor, an operation-unit sensor, and a driving force controller, which detects the operation-unit operation amount and generates a negative driving force based on the initial time change of the paddle lever operation, allowing for smooth deceleration control through switch mode and analog mode operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the deceleration rate changes stepwise with the paddle shift switch, then the control structure is simple, but the deceleration smoothness deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from a static stepwise deceleration control to a dynamic continuous control system. The driving force controller continuously adjusts the negative driving force based on real-time paddle operation amount and initial time change rate, enabling smooth deceleration that adapts to driver intent while maintaining manageable system complexity through electronic control.
Solution Approach 2:
The patent changes the control parameter from discrete stepwise deceleration levels to continuous negative driving force values. By using the initial time change (rate of change of paddle operation amount) as a control parameter, the system achieves smooth deceleration transitions while keeping the overall control structure relatively simple through parameter-based control strategies.
2Device complexity
If the deceleration rate changes stepwise, then the control system is simple, but the ability to achieve desired deceleration deteriorates
Solution Approach 1:
The system dynamically adjusts the deceleration rate based on the initial time change of the paddle operation amount, allowing the control system to adapt to different driver intentions. This dynamic approach enables versatile deceleration control (smooth, gradual, or aggressive) without requiring complex multiple control modes, maintaining system simplicity while improving adaptability.
Solution Approach 2:
The driving force controller uses feedback from the paddle operation amount and its initial time change rate to continuously adjust the negative driving force. This feedback mechanism enables the system to achieve desired deceleration profiles by responding to driver input characteristics, enhancing control flexibility without significantly increasing system complexity.
3Speed
If the motor generates negative driving force based on paddle operation amount, then the deceleration responsiveness is improved, but the deceleration smoothness deteriorates
Solution Approach 1:
The system performs preliminary action by calculating the initial time change (rate of change) of the paddle operation amount before applying the negative driving force. This preliminary calculation allows the controller to anticipate the desired deceleration profile and apply smooth transitions from the start, maintaining both responsiveness and smoothness.
Solution Approach 2:
The patent changes the control approach by using the initial time change parameter alongside the paddle operation amount. This dual-parameter control enables the system to respond quickly to driver input while smoothing the deceleration trajectory, achieving both responsiveness and smoothness through parameter optimization.
Data Source
AI summary
A control device for a vehicle includes an operation unit, an operation-unit sensor, a motor, and a driving force controller. The operation-unit sensor is configured to detect an operation-unit operation amount. The operation-unit operation amount is an amount of operation of the operation unit. The motor is capable of generating a negative driving force for decelerating the vehicle. The driving force controller is configured to cause the motor to drive a wheel of the vehicle with the negative driving force on a basis of the operation-unit operation amount, and to derive the negative driving force in accordance with an initial time change. The initial time change represents an amount of change in the operation-unit operation amount per unit time relative to an operation-unit operation amount at an initial position of the operation unit.