Vehicle Urea Inducement via Speed-Adjusted Residual Distance
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Solution Overview
Problem
Conventional driver inducement methods for urea replenishment in vehicles do not adequately consider the actual vehicle speed, leading to unnecessary urea replenishment events even during low urea levels, as urea consumption is closely related to the vehicle's operating state, particularly its speed.
Innovation Solution
A driver inducement method and system that calculates a final residual travel distance based on both the urea level and vehicle speed, limiting engine output or prohibiting engine restart if the residual travel distance is below a threshold, thereby prompting the driver to replenish urea only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional driver inducement methods are used that only consider urea level, then the system is simple to operate, but unnecessary urea replenishment events occur even during low urea levels
Solution Approach 1:
The patent applies parameter changes by introducing vehicle speed as an additional parameter to the driver inducement decision-making process. The control unit calculates residual travel distance based on both urea level and vehicle speed, dynamically adjusting the threshold for triggering replenishment warnings. This resolves the contradiction by maintaining operational simplicity while eliminating unnecessary urea replenishment through smarter parameter-based decision logic.
2Reliability
If driver inducement is triggered at low urea levels regardless of vehicle speed, then nitrogen oxide purification is ensured, but urea consumption increases due to frequent replenishment
Solution Approach 1:
The patent applies preliminary action by calculating the residual travel distance in advance based on current urea level and vehicle speed. The system predicts how far the vehicle can travel before urea depletion, allowing nitrogen oxide purification to be maintained throughout the predicted range while avoiding premature replenishment. This resolves the contradiction by ensuring reliable purification only when actually needed, reducing unnecessary urea consumption.
3Loss of substance
If the system calculates residual travel distance based on both urea level and vehicle speed, then urea usage is optimized, but the calculation complexity increases
Solution Approach 1:
The patent applies feedback by continuously monitoring vehicle speed and urea level, then using this feedback to dynamically calculate and update the residual travel distance. The control unit adjusts the driver inducement threshold based on real-time feedback from speed sensors and urea level detectors, optimizing urea usage efficiency through adaptive decision-making while keeping the calculation logic relatively simple and implementable in existing vehicle control systems.
Data Source
AI summary
A driver inducement method and a driver inducement system for a vehicle that induce a driver to replenish a urea considering a urea level in a urea tank and an actual vehicle speed are disclosed. The driver inducement method may include: calculating a first residual travel distance according to a urea level and an average urea consumption if an engine is started; calculating a final residual travel distance based on the first residual travel distance according to the urea level and the average urea consumption and a second residual travel distance according to the urea level and a vehicle speed, if the first residual travel distance according to the urea level and the average urea consumption is smaller than a threshold distance; and limiting an engine output according to the final residual travel distance.