Passing Assist Device Speed Suspend Logic

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Solution Overview

Problem

Existing passing assist devices may cause a breach of traffic rules by allowing a vehicle to pass another vehicle and then change lanes into a passing lane where a preceding vehicle is traveling at a low speed, potentially leading to unsafe situations.

Innovation Solution

A passing assist device that includes a detection unit to identify vehicles in the traveling lane and passing lane, a passing control unit to manage lane changes and speed adjustments, and a suspending unit to prevent lane changes if the vehicle's speed is lower than a preset speed of a preceding vehicle in the passing lane, ensuring safe passing and lane re-entry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the own vehicle changes lane from the traveling lane to the passing lane to pass another vehicle, then the passing efficiency is improved, but the risk of breaching traffic rules increases when a preceding vehicle is traveling at low speed in the passing lane

Engineering Contradiction:

Improvepassing efficiencyVSAvoidtraffic rule compliance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system applies preliminary anti-action by detecting the presence and speed of a preceding vehicle in the passing lane before executing the lane change. If the preceding vehicle is traveling at a low speed, the system preemptively prevents the lane change maneuver, thereby avoiding the potential breach of traffic rules before it can occur.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system performs preliminary action by conducting speed comparison and safety verification before the actual lane change operation. The passing assist device calculates whether the own vehicle's speed is appropriately higher than the preceding vehicle's speed, and only permits lane change when this condition is satisfied, ensuring traffic rule compliance before the maneuver begins.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the own vehicle accelerates to pass another vehicle and then changes lane back to the traveling lane, then the passing maneuver is completed efficiently, but unsafe situations may arise if the vehicle speed is not appropriately managed relative to the preceding vehicle

Engineering Contradiction:

Improvepassing maneuver efficiencyVSAvoidunsafe driving situations

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system implements feedback by continuously monitoring the speed relationship between the own vehicle and the preceding vehicle throughout the passing maneuver. The passing assist device provides feedback signals to the driver or automatically adjusts the passing strategy based on whether the speed differential maintains safe and legal passing conditions, thereby preventing unsafe situations.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system applies dynamics by making the lane change decision conditional and adaptable based on real-time speed measurements. Rather than executing a fixed passing sequence, the system dynamically evaluates the speed relationship with the preceding vehicle and adjusts the passing maneuver accordingly, permitting or preventing lane changes based on current safety conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10864915B2Passing assist device

Publication Date: 2020.12.15 DENSO CORP

AI summary

A passing assist device includes a detection unit, a passing control unit, a speed setting unit, and a suspending unit. When the speed of an own vehicle set by the speed setting unit is lower than a preset speed when the own vehicle is traveling in a passing lane, the suspending unit suspends a lane change from the passing lane to a traveling lane by the passing control unit.