SSC-SCC System Maintaining Safe Distance for Fuel Efficiency
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Solution Overview
Problem
Conventional Start/Stop Coasting (SSC) systems do not maintain a safe distance from preceding vehicles when the brake pedal is disengaged, leading to reduced fuel efficiency and increased driver fatigue due to frequent mode changes.
Innovation Solution
An SSC-SCC system that automatically maintains a distance from a preceding vehicle using Smart Cruise Control (SCC) by determining if the distance is less than a preset reference, performing SCC braking when necessary, and releasing it when the distance exceeds the reference, allowing the SSC mode to be maintained without driver intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SSC mode is released when the distance from the preceding vehicle decreases, then safety is improved, but fuel efficiency deteriorates due to frequent mode changes
Solution Approach 1:
The patent merges the SSC mode with SCC (Smart Cruise Control) functionality to create an integrated system. When the distance to the preceding vehicle decreases, the system performs SCC braking while maintaining the SSC mode, combining the fuel-saving benefits of SSC with the safety benefits of active distance maintenance. This eliminates the need to release SSC mode for safety reasons, thereby preserving fuel efficiency.
2Reliability
If the driver engages the brake pedal to maintain distance, then safety is improved, but driver fatigue increases due to frequent manual intervention
Solution Approach 1:
The system implements self-service by automatically maintaining the safe distance from the preceding vehicle through SCC braking without requiring continuous manual brake pedal engagement. The controller autonomously monitors the distance and applies braking force when necessary, eliminating the need for constant driver intervention and reducing driver fatigue while maintaining safety.
3Loss of energy
If the SSC mode is maintained continuously, then fuel efficiency is improved, but the risk of collision increases when distance to preceding vehicle decreases
Solution Approach 1:
The system implements feedback control by continuously monitoring the distance to the preceding vehicle and adjusting the braking force accordingly. When the distance decreases below a threshold, the controller activates SCC braking to increase the distance back to the safe range. This closed-loop feedback mechanism allows the system to maintain SSC mode for fuel efficiency while dynamically adjusting to prevent collision risks.
Data Source
AI summary
A method for controlling an SSC-SCC system for increasing a SSC distance using SCC is provided. The method includes determining whether a vehicle in operation satisfies a preset SSC entry condition and entering the SSC mode or maintaining the SSC entry state when the vehicle satisfies the preset SSC entry condition. A distance from a preceding vehicle is measured after the entering of the SSC mode or the maintaining of the SSC entry state. Additionally, the method includes determining whether the measured distance is equal to or less than a preset reference distance and performing SCC braking in response to determining that the measured distance is equal to or less than the preset reference distance.