Vehicle Control Device for Wave-Like Speed Pattern Generation
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Solution Overview
Problem
Conventional travel control systems, such as those described in Japanese Unexamined Patent Application Publication No. 2008-129804, face challenges in allowing wave-like travel patterns that alternate between acceleration and free run travel, as they may cause discomfort or stress to rear vehicles, making it difficult to achieve low fuel consumption while considering the rear vehicle's situation.
Innovation Solution
A vehicle control device that checks the travel situation of the rear vehicle and generates a wave-like travel speed pattern, incorporating factors like road surface gradient and rear vehicle type information, to adjust acceleration and deceleration periods, thereby reducing discomfort and achieving low fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wave-like travel with acceleration and free run travel is performed to reduce fuel consumption, then fuel efficiency is improved, but discomfort and stress to the rear vehicle increases
Solution Approach 1:
The system dynamically adjusts the wave-like travel pattern based on real-time detection of rear vehicle conditions. When a rear vehicle is detected, the control device modifies acceleration and deceleration patterns to reduce discomfort, while still maintaining fuel-efficient travel when conditions permit.
Solution Approach 2:
The control device changes operational parameters (acceleration rates, free run durations, speed profiles) based on the detected travel situation of the rear vehicle. This allows optimization of both fuel consumption and rear vehicle comfort by adapting parameters to current conditions.
2Use of energy by moving object
If wave-like travel speed pattern is generated without considering rear vehicle situation, then fuel consumption is reduced, but the rear vehicle cannot follow the pattern causing stress
Solution Approach 1:
The system implements feedback by continuously monitoring the rear vehicle's travel situation and using this information to adjust the wave-like travel pattern. This ensures the generated pattern is reliable and can be followed by the rear vehicle while maintaining fuel efficiency.
Solution Approach 2:
The control device performs preliminary detection of the rear vehicle's travel situation before generating the wave-like travel speed pattern. This advance knowledge allows the system to create a pattern that the rear vehicle can reliably follow, preventing stress and maintaining fuel efficiency.
3Productivity
If acceleration and deceleration are increased to maintain travel policy, then fuel consumption is reduced, but discomfort to the rear vehicle increases
Solution Approach 1:
The system dynamically adjusts acceleration and deceleration rates based on rear vehicle detection. When a rear vehicle is present, the control device reduces acceleration intensity to minimize discomfort while still working to satisfy the travel policy through optimized timing and speed management.
Solution Approach 2:
The control device applies different quality levels of acceleration and deceleration based on the local situation (presence of rear vehicle). Instead of uniform aggressive acceleration, the system tailors the intensity to the specific context, balancing fuel efficiency with rear vehicle comfort.
Data Source
AI summary
Provided is a vehicle control device which generates a speed pattern of a vehicle and controls traveling of the vehicle based on the speed pattern, including: rear vehicle travel situation checking means for checking a travel situation of a rear vehicle which travels behind the vehicle; wave-like travel speed pattern generating means for generating a wave-like travel speed pattern where acceleration travel and free run travel are alternately repeated based on the travel situation of the rear vehicle; and control means for controlling the traveling of the vehicle based on the wave-like travel speed pattern.