Vehicle Control System Towing Posture Adjustment
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Solution Overview
Problem
Conventional vehicle posture control systems fail to achieve desired vehicle turning performance during towing, as they do not adequately consider the accelerator pedal opening, leading to insufficient sinking of the vehicle body front part and compromised turning stability.
Innovation Solution
A control system that adjusts additional deceleration based on both the steering angle and accelerator opening, with increased deceleration during towing at the same accelerator opening compared to non-towing, using sensors and a controller to ensure appropriate vehicle posture control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the driver steps on the accelerator pedal more during towing to compensate for drag, then the vehicle speed and acceleration are maintained, but the sinking of the vehicle body front part during deceleration becomes insufficient
Solution Approach 1:
The control system incorporates feedback from the accelerator pedal operation during towing. When the system detects accelerator pedal depression during steering operation while towing, it increases the deceleration applied to the vehicle. This feedback mechanism ensures that even when the driver accelerates to compensate for towing drag, the system responds by applying sufficient deceleration to achieve the necessary vehicle body front part sinking for proper steering response.
2Device complexity
If the additional deceleration is set only based on steering angle and towing status, then the control system is simple, but it cannot adequately compensate for insufficient front part sinking when accelerator opening is large during towing
Solution Approach 1:
The control system dynamically adjusts the deceleration magnitude based on real-time detection of accelerator pedal operation during towing. Rather than using a fixed deceleration value, the system modifies the deceleration amount according to the current operating conditions, specifically increasing deceleration when the accelerator is depressed during steering while towing. This dynamic adjustment maintains simple system architecture while improving turning performance.
Data Source
AI summary
A control system for a vehicle is provided, which includes an accelerator pedal and a steering wheel configured to be operated by a driver, an accelerator opening sensor configured to detect an accelerator opening corresponding to operation of the accelerator pedal, a steering angle sensor configured to detect a steering angle corresponding to operation of the steering wheel, and a controller configured to set an additional deceleration to be applied to the vehicle in order to control a posture of the vehicle based on the detected steering angle, when the steering wheel is turned, and apply the additional deceleration to the vehicle. The controller sets the additional deceleration based on the detected accelerator opening, in addition to the steering angle, and sets the additional deceleration larger while the vehicle is towing than while the vehicle is not towing, when the additional decelerations are compared at the same accelerator opening.