Dynamic Speed Limiter Using Map Data for Variable Limits
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Solution Overview
Problem
Current speed limiting systems for motor vehicles do not allow dynamic adjustment of maximum vehicle speed without user intervention, requiring frequent resets when driving in areas with varying speed limits, such as city, suburban, and highway environments.
Innovation Solution
A dynamic speed limiting system that uses a processor, memory, and map information to allow users to set a speed increase value, which is then applied to the posted speed limit of the road, enabling automatic adjustment of the maximum vehicle speed based on the user's selection and the current road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed maximum speed is set in the speed limiting system, then the system provides stable speed control, but it requires frequent manual resetting when driving in areas with varying speed limits
Solution Approach 1:
The patent applies the dynamics principle by making the speed limit value dynamically adjustable based on geographic location. The system automatically changes the maximum speed limit from a fixed value to a variable value that adapts to different road sections, eliminating the need for frequent manual resetting while maintaining stable speed control through automated adjustment.
Solution Approach 2:
The system implements self-service by automatically retrieving speed limit information from map data based on the vehicle's current location and adjusting the speed limit without requiring user intervention. The processor autonomously compares the current speed with the retrieved limit and controls the throttle accordingly, making the system self-regulating.
2Adaptability or versatility
If the speed limiting system uses a preset fixed speed value, then the system structure remains simple, but it cannot adapt to varying speed limits in different driving environments
Solution Approach 1:
The patent applies universality by integrating multiple functions into the speed limiting system: it combines map data retrieval, automatic speed limit determination, and speed control in a single system. The processor serves multiple purposes by both controlling the throttle and managing the speed limit adjustments, allowing the system to adapt to various driving environments without requiring separate dedicated components for each function.
Solution Approach 2:
The system uses map data as an intermediary to bridge the vehicle's current location and the appropriate speed limit. The map information serves as a mediator that translates geographic position into the correct speed limit value, enabling the system to adapt to different driving environments without direct user input or complex sensing mechanisms.
3Reliability
If manual resetting of speed limit is required for each road type, then the system maintains precise speed control, but it increases user intervention and reduces driving convenience
Solution Approach 1:
The system implements feedback by continuously monitoring the vehicle's geographic location through map data and automatically adjusting the speed limit based on the retrieved information. The processor receives feedback about the current road section's speed limit and responds by adjusting the maximum allowed speed, maintaining precise speed control without requiring user intervention for each road type change.
Data Source
AI summary
An intelligent dynamic speed limiting system for use with a motor vehicle is disclosed. The system may have a processor, a memory in communication with the processor, a source of map information that provides posted speed limit information for roads in a geographic region, and a speed set control. The speed set control may be configured to enable a user to select a speed increase value by which a speed of the vehicle may exceed a posted speed limit. The processor may read the speed increase value set by the user and limit the vehicle speed to that of a posted speed limit for a road that the vehicle is travelling on, plus an additional speed increment determined by the processor by using the user set speed increase value.