Vehicle Control System Restricting Engine Auto-Stop Near Temporary Stop Signs
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Solution Overview
Problem
Existing vehicle control systems with automatic stop-restart functions face inefficiencies in fuel consumption and startup delays when vehicles temporarily stop near temporary stop points, leading to potential fuel wastage and driver inconvenience.
Innovation Solution
A control system that restricts engine auto-stop in predetermined areas before temporary stop points, except when a high likelihood of prolonged stops is detected, allowing for optimized fuel efficiency by delaying engine shutdown until conditions are favorable, and automatically restarting the engine when necessary to follow preceding vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the automatic stop-restart function is activated when the vehicle temporarily stops near a temporary stop point, then fuel efficiency is improved, but vehicle startup slowness occurs due to delay in engine restart
Solution Approach 1:
The control system applies preliminary anti-action by detecting the presence of a preceding vehicle before allowing automatic engine stop. When a preceding vehicle is detected in the predetermined area, the system preemptively prevents the automatic stop condition from being satisfied, thereby avoiding the harmful effect of brief engine stops and subsequent startup delays that would occur in temporary stop situations
Solution Approach 2:
The system dynamically adjusts the automatic stop condition based on the detection of a preceding vehicle. The stop condition is made flexible - it is satisfied only when no preceding vehicle is detected, and remains unsatisfied when a preceding vehicle is present. This dynamic adjustment allows the system to adapt to different traffic situations, enabling fuel-saving stops in appropriate conditions while preventing startup delays in temporary stop scenarios
2Use of energy by moving object
If the automatic stop-restart function is activated when the vehicle temporarily stops near a temporary stop point, then fuel efficiency is improved, but brief automatic engine stops occur causing fuel wastage
Solution Approach 1:
The control system applies preliminary anti-action by detecting the presence of a preceding vehicle before allowing automatic engine stop. When a preceding vehicle is detected in the predetermined area, the system preemptively prevents the automatic stop condition from being satisfied, thereby avoiding the harmful effect of brief engine stops and subsequent startup delays that would occur in temporary stop situations
Solution Approach 2:
The system dynamically adjusts the automatic stop condition based on the detection of a preceding vehicle. The stop condition is made flexible - it is satisfied only when no preceding vehicle is detected, and remains unsatisfied when a preceding vehicle is present. This dynamic adjustment allows the system to adapt to different traffic situations, enabling fuel-saving stops in appropriate conditions while preventing startup delays in temporary stop scenarios
Data Source
AI summary
A control system is intended for a vehicle having an automatic stop-restart function that automatically stops an engine when a predetermined automatic stop condition is satisfied and restarts the engine when a predetermined restart condition is satisfied during an automatic engine stop. The control system has an automatic stop restricting function that, when the host vehicle is located in a first predetermined area before a temporary stop sign, prohibits an automatic stop of the engine. When a preceding vehicle is located in the first predetermined area, the automatic stop restricting function is deactivated.