Adaptive Cruise Control With Dual Speed Ranges for Energy Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle driving systems face challenges in achieving high energy efficiency during constant-speed control, as they often rely on narrow vehicle-speed ranges that limit the flexibility of drive unit operation, leading to suboptimal energy management.
Innovation Solution
A vehicle driving assistance system that switches between first and second constant-speed control modes based on vehicle-speed ranges, allowing for wider variations in vehicle speed, thereby optimizing energy efficiency by adjusting acceleration and deceleration strategies based on detected forward and following vehicles and inter-vehicle distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If narrow vehicle-speed range control is used, then vehicle speed stability is improved, but energy efficiency deteriorates
Solution Approach 1:
The system dynamically switches between two constant-speed control modes (first and second constant-speed control) based on traveling conditions. The first constant-speed control uses a narrow vehicle-speed range for high stability, while the second constant-speed control uses a wider vehicle-speed range for improved energy efficiency. This dynamic adaptation allows the system to optimize the balance between stability and energy efficiency according to real-time conditions.
Solution Approach 2:
The system changes the vehicle-speed range parameter based on traveling conditions. When switching from the first constant-speed control to the second constant-speed control, the allowable vehicle-speed variation range is expanded, enabling the drive unit to operate in more efficient energy zones while still maintaining the average vehicle speed at the set value.
2Use of energy by moving object
If wider vehicle-speed range control is used, then energy efficiency is improved, but vehicle speed stability deteriorates
Solution Approach 1:
The system employs dynamic switching between control modes rather than using a fixed wide vehicle-speed range. The second constant-speed control with wider range is activated only when traveling conditions are appropriate, while the first constant-speed control with narrow range is used when stability is prioritized. This dynamic approach allows the system to享受 the energy efficiency benefits of wider range control only when necessary.
Solution Approach 2:
The constant-speed control is segmented into two distinct modes: first constant-speed control with narrow vehicle-speed range for stability-critical situations, and second constant-speed control with wide vehicle-speed range for energy efficiency optimization. This segmentation allows the system to selectively apply the appropriate control strategy based on real-time traveling conditions.
3Use of energy by moving object
If drive unit operation flexibility is increased, then energy efficiency is improved, but control complexity increases
Solution Approach 1:
The control system dynamically selects between two predefined constant-speed control modes based on simple traveling condition assessments. Rather than implementing a complex continuous optimization algorithm, the system uses discrete mode switching with clear transition criteria, thereby achieving improved energy efficiency through manageable control complexity.
Solution Approach 2:
The system implements partial optimization by focusing on switching between two specific constant-speed control modes rather than optimizing all possible drive unit parameters simultaneously. This partial action approach achieves meaningful energy efficiency improvements while keeping the control system relatively simple and manageable.
Data Source
AI summary
A vehicle driving assistance system performs traveling assistance control under which an own vehicle automatically travels with. The traveling assistance control includes first constant-speed control for automatically controlling the acceleration of the own vehicle, based on a first vehicle-speed range including a set vehicle speed, such that the vehicle speed of the own vehicle is kept equal to the set vehicle speed, and second constant-speed control for automatically controlling the acceleration of the own vehicle, based on a second vehicle-speed range including the set vehicle speed, such that the vehicle speed of the own vehicle is kept equal to the set vehicle speed. The second vehicle-speed range is set to a wider range than the first vehicle-speed range. The vehicle driving assistance system switches the traveling assistance control between the first constant-speed control and the second constant-speed control, according to the traveling state of the own vehicle.