Fuel-Saving Control Logic for Turn Signals and Road Context
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Solution Overview
Problem
Conventional fuel-saving control devices unconditionally stop fuel-saving operations when a direction indicating operation is detected, leading to decreased fuel-saving performance and impaired driver convenience and safety, especially in situations where the surplus driving force is equal to or greater than the threshold value.
Innovation Solution
A fuel-saving control device and method that includes a direction indicating operation detection unit, vehicle position detection unit, and map information storage unit to determine whether to stop or continue fuel-saving control based on vehicle position and intended maneuvers, ensuring the control is not unconditionally stopped during non-emergency situations like lane changes on local roads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fuel-saving control is unconditionally stopped when direction indicating operation is detected, then driver convenience and safety are improved, but fuel-saving performance deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the treatment of direction indicating operations based on vehicle position. When the vehicle is positioned at intersections or on expressways, fuel-saving control is stopped to prioritize driver convenience. However, when the vehicle is on local roads, fuel-saving control continues to maintain energy efficiency. This spatial differentiation resolves the contradiction by applying different control strategies to different operational contexts.
Solution Approach 2:
The patent implements dynamics by making the fuel-saving control stop condition variable rather than fixed. The control stop determination unit dynamically evaluates both the direction indicating operation state and the vehicle position to decide whether to stop fuel-saving control. This dynamic approach allows the system to adapt to changing conditions, stopping fuel-saving control only when necessary for driver convenience while maintaining it otherwise to preserve fuel efficiency.
2Force
If fuel-saving control is stopped at intersections and expressways, then accelerating force availability is improved, but fuel-saving performance deteriorates
Solution Approach 1:
The patent applies local quality by identifying specific locations (intersections and expressways) where fuel-saving control should be stopped to ensure adequate accelerating force availability. At these critical locations, driver convenience and safety take precedence. However, at other locations such as local roads, fuel-saving control continues, maintaining energy efficiency without compromising accelerating force where needed.
Solution Approach 2:
The system dynamically determines whether to stop fuel-saving control based on real-time vehicle position and direction indicating operation state. The control stop determination unit evaluates the current context to decide whether prioritizing accelerating force availability is necessary, thereby dynamically balancing between force availability and fuel-saving performance.
3Loss of energy
If fuel-saving control continues during all lane changes, then fuel-saving performance is improved, but driver convenience and safety deteriorate
Solution Approach 1:
The patent applies local quality by differentiating lane change scenarios based on vehicle position. Lane changes on local roads are treated differently from lane changes on expressways or at intersections. On local roads, fuel-saving control continues to maintain energy efficiency. On expressways or at intersections, fuel-saving control is stopped to prioritize driver convenience and safety, recognizing that these locations present higher risk or different driving dynamics.
Solution Approach 2:
The system dynamically evaluates the vehicle position and direction indicating operation state to determine whether to maintain or stop fuel-saving control during lane changes. This dynamic decision-making process allows the system to preserve fuel-saving performance in low-risk scenarios while ensuring driver convenience and safety in high-risk or critical driving situations.
Data Source
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AI summary
A fuel-saving control device (100) equipped with: a surplus drive force calculation unit (101) for calculating surplus drive force; a fuel-saving control unit (102) for executing a fuel-saving control which lowers and corrects the indicated fuel injection amount according to the accelerator position when the surplus drive force reaches or exceeds a threshold, and stopping the fuel-saving control when the surplus drive force falls below the threshold; a direction indicator operation detection unit (107) for detecting operation of a direction indicator; a vehicle position detection unit (108) for detecting the vehicle position; a map information storage unit (109) for storing map information; and a fuel-saving control stoppage condition determination unit (110) for determining whether or not a fuel-saving control should be stopped, on the basis of the map information and the vehicle position when the direction indicator operation is detected. When determined that the fuel-saving control should be stopped, the fuel-saving control unit (102) stops the fuel-saving control even if the surplus drive force does not fall below the threshold.