Speed Control Button with Press-Duration Logic
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Solution Overview
Problem
Current speed control systems for motor vehicles are not user-friendly and require cumbersome manual interventions to adjust or reactivate speed control, especially in situations requiring quick deviations from set speeds or to compensate for lack of anticipation.
Innovation Solution
A speed control system featuring a button-based control element that allows for different interventions depending on the duration of button press, enabling temporary interruption of speed control for freewheeling and coasting modes without manual reactivation steps, with automatic resumption of original speed control when the button is released.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a button press interrupts speed control for freewheeling, then ease of operation is improved, but control effort increases
Solution Approach 1:
The control element is segmented into multiple functional zones: a first region that triggers speed control interruption and a second region that triggers deactivation. This spatial segmentation allows the driver to perform different operations (temporary interruption vs. full deactivation) using the same physical component, improving ease of operation while maintaining clear functional distinction
Solution Approach 2:
The system dynamically responds to the duration of button press: short presses (first time period) interrupt speed control for freewheeling, while longer presses (second time period) fully deactivate the system. This dynamic response based on temporal parameters provides intuitive control with reduced effort
2Ease of operation
If multiple control elements are used for different functions, then ease of operation is improved, but device complexity increases
Solution Approach 1:
A single control element (button) is designed to perform multiple functions: interrupting speed control, deactivating the system, and potentially reactivating it. The button incorporates both a first region and a second region with different functions, eliminating the need for separate control elements and reducing device complexity while maintaining ease of operation
3Reliability
If speed control is interrupted and requires manual reactivation, then reliability is improved, but loss of time increases
Solution Approach 1:
The system stores the previously active speed control state in memory during interruption. When the driver presses the button again, the system automatically restores the stored speed control state without requiring manual reconfiguration. This preliminary storage action reduces the time loss associated with reactivation while maintaining reliable control
Data Source
AI summary
A speed control system for a motor vehicle has an electronic control device which generates actuation signals for controlling the speed of the motor vehicle to a specified desired speed, and a control element, on the actuation of which an intervention which influences the speed control is performed. The control element is designed in the form of a button. When the button is pressed, the system intervenes in the active speed control for the time for which the button is pressed in such a way that no drive torque is generated. When the button is no longer pressed, the original speed control is resumed.