Vehicle Speed Pattern Control for Traffic Flow Adaptation
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Solution Overview
Problem
Existing fuel efficiency improvement technologies for vehicles struggle to adapt to varying traffic flow conditions on general roads, leading to potential disturbances in traffic and reduced efficiency when not synchronized with surrounding traffic.
Innovation Solution
A vehicle control device that generates a speed pattern alternating between acceleration and inertia travel patterns, reducing speed in front of intersections and exits to match traffic flow, using sensors and navigation systems to adjust speed based on traffic conditions and vehicle interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a vehicle travels under its own inertia without acceleration or regeneration to improve fuel efficiency, then fuel efficiency is improved, but the vehicle speed may not match the traffic flow speed causing disturbance to surrounding traffic
Solution Approach 1:
The patent applies dynamics by making the vehicle's speed pattern adjustable and adaptive rather than fixed. The control device dynamically modifies the inertia-based speed pattern in response to detected traffic flow conditions, allowing the vehicle to transition between pure inertia travel and accelerated travel to match surrounding traffic speed while maintaining fuel efficiency where possible.
Solution Approach 2:
The patent implements feedback by using detection means to continuously monitor the speed of surrounding traffic flow and comparing it with the vehicle's current speed pattern. Based on this feedback, the control device determines whether to maintain the inertia-based speed pattern or switch to an accelerated pattern, creating a closed-loop control system that adapts to real-time traffic conditions.
2Loss of energy
If the vehicle maintains a fixed speed pattern for fuel efficiency, then energy consumption is reduced, but the vehicle cannot respond to changing traffic conditions
Solution Approach 1:
The patent makes the speed pattern dynamic by allowing it to change based on detected traffic conditions. The control device can switch between maintaining a fixed inertia-based pattern (for energy efficiency) and switching to an accelerated pattern (for traffic adaptability), creating a flexible system that optimizes both energy loss and adaptability.
Solution Approach 2:
The patent applies parameter changes by modifying the vehicle's speed parameters in response to traffic conditions. When traffic flow speed differs from the inertia-based speed pattern, the control device changes the speed parameters by initiating acceleration, thereby adjusting the vehicle's motion parameters to better match surrounding traffic while managing energy consumption.
Data Source
AI summary
A vehicle control device generates a speed pattern alternately repeating an acceleration travel pattern having a section accelerating a host vehicle and an inertia travel pattern having a section with an acceleration driving force of zero and a deceleration braking force of zero with respect to the wheels of the host vehicle. The speed pattern is generated by reducing speed of the host vehicle in front of any one position of an intersection of the road on which the host vehicle travels and an exit leading to the road. The intersection and the exit may encounter another vehicle, and may include a traffic flow of other vehicles on a road with a host vehicle. Matching a proved speed by reducing vehicle speed of a speed pattern with a position of an intersection or an exit, the host vehicle may cooperate with traffic flow to improve fuel efficiency.