Overtaking Speed Calculation for Faster Vehicle Passing
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Solution Overview
Problem
Existing driving control systems require a long time to complete overtaking maneuvers when the preceding vehicle travels at a speed slightly slower than the host vehicle, necessitating a solution to reduce overtaking time.
Innovation Solution
A driving control device that includes a preceding vehicle information acquisition unit, a traveling environment recognition unit, a determination unit, an overtaking vehicle speed calculation unit, and a driving control unit, which calculates and executes an overtaking speed faster than the preceding vehicle, ensuring a predetermined speed difference and potentially exceeding the legal maximum speed when safe, to facilitate quicker overtaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the host vehicle maintains the setting vehicle speed during overtaking, then the driving control is simple and stable, but the overtaking time becomes excessively long
Solution Approach 1:
The patent applies dynamics by transitioning from static speed control (maintaining constant setting vehicle speed) to dynamic speed control (adjusting speed based on relative position to preceding vehicle). The control device dynamically modifies the target speed during overtaking maneuvers, increasing speed when needed to reduce overtaking time while maintaining stability when the maneuver is complete.
Solution Approach 2:
The patent changes the speed parameter dynamically during overtaking. Instead of maintaining a fixed setting vehicle speed, the system adjusts the target speed parameter based on the host vehicle's position relative to the preceding vehicle, allowing faster overtaking when the host vehicle is behind and returning to normal speed limits after overtaking is complete.
2Loss of time
If the host vehicle increases speed significantly to overtake faster, then the overtaking time is reduced, but the risk of exceeding legal maximum speed increases
Solution Approach 1:
The patent implements feedback control by continuously monitoring the host vehicle's position relative to the preceding vehicle and adjusting the target speed accordingly. The system uses sensor data to detect when overtaking is complete and feedback this information to the control algorithm, which then reduces the target speed to comply with legal limits, preventing excessive speed accumulation.
Solution Approach 2:
The patent applies partial excessive action by allowing the host vehicle to temporarily exceed the setting vehicle speed during the overtaking maneuver to reduce overtaking time, but only to the extent necessary to complete the pass. Once overtaking is detected as complete, the system immediately reduces speed back to legal limits, applying excessive speed only partially and temporarily rather than continuously.
3Reliability
If the host vehicle waits for a large gap in front of the preceding vehicle before overtaking, then the safety margin is increased, but the overtaking opportunity is delayed
Solution Approach 1:
The patent applies preliminary action by calculating and preparing the overtaking maneuver in advance. The control device continuously monitors conditions and pre-calculates the optimal overtaking timing and speed profile, allowing the host vehicle to initiate the maneuver as soon as conditions are favorable rather than waiting for a large gap to fully develop.
Solution Approach 2:
The system dynamically adjusts the safety margin requirement based on real-time conditions. Rather than requiring a fixed large gap, the control algorithm dynamically determines the minimum safe gap based on current speed, acceleration capabilities, and environmental factors, allowing overtaking to proceed sooner while maintaining appropriate safety margins.
Data Source
AI summary
A driving control device that performs overtaking control, includes: a preceding vehicle information acquisition unit configured to acquire preceding vehicle information about a speed of a preceding vehicle; a determination unit configured to determine propriety of the overtaking control, based on a traveling environment; an overtaking vehicle speed calculation unit configured to calculate an overtaking vehicle speed of a host vehicle, based on the preceding vehicle information, in response to a determination by the determination unit that the overtaking control is possible; and a driving control unit configured to execute the overtaking control using the overtaking vehicle speed, wherein the overtaking vehicle speed calculation unit is configured to calculate an overtaking vehicle speed which is faster than a speed of the preceding vehicle and in which a speed difference relative to the speed of the preceding vehicle becomes a predetermined speed difference.