Vehicle Speed Control Using Turn Indicators Before Turns

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Solution Overview

Problem

Existing speed control systems for vehicles do not adequately account for terrain conditions and turn indicators, leading to excessive braking and increased driver workload when navigating turns.

Innovation Solution

A speed control system that adjusts vehicle speed based on turn indicator status, terrain type, occupant comfort, and predicted routes, using controllers to determine a turn indicator target speed limit and control vehicle speed accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the vehicle maintains a constant target speed, then productivity is improved, but vehicle composure and safety deteriorate during turns

Engineering Contradiction:

Improvevehicle speed maintenanceVSAvoidvehicle composure

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The speed control system detects turn indicator status and proactively reduces vehicle speed before the turn is executed. By anticipating the turning maneuver through the turn indicator signal, the system pre-adjusts speed to appropriate levels, ensuring vehicle composure and safety during the actual turn while maintaining productivity during straight sections

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the vehicle reduces speed automatically before turning, then vehicle composure is improved, but loss of time occurs due to speed reduction

Engineering Contradiction:

Improvevehicle composureVSAvoidjourney time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs speed reduction in advance by detecting turn indicator activation, allowing the vehicle to approach turns at optimal speeds without abrupt braking. This preliminary speed adjustment maintains vehicle composure while minimizing time loss by avoiding last-moment deceleration and enabling smoother, more efficient turning maneuvers

Inventive Principle:

Principle #10Preliminary action

3Speed

If excessive braking is applied before turning, then vehicle speed is reduced, but driver workload and user enjoyment worsen

Engineering Contradiction:

Improvevehicle speed reductionVSAvoiddriver workload

Core Design Contradiction:

SpeedVSEase of operation

Solution Approach 1:

The speed control system autonomously manages speed reduction by detecting turn indicator status and automatically adjusting vehicle speed without requiring driver intervention. The system self-regulates braking to appropriate levels, eliminating the need for excessive manual braking and thereby reducing driver workload while maintaining safe turning speeds

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

By proactively reducing speed in response to turn indicator detection, the system performs the speed adjustment task before the turn is initiated. This preliminary action eliminates the need for abrupt, excessive braking close to the turn, providing a smoother experience that reduces driver workload and enhances user enjoyment

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250326394A1Speed control system for a vehicle and method

Publication Date: 2025.10.23 JAGUAR LAND ROVER LTD

AI summary

Aspects of the present invention relate to a speed control system (15) for a vehicle (10), to a method and to a vehicle (10). The system causes the vehicle (10) to drive at a target speed value. The speed control system (15) receives a turn indicator status signal indicative of a state of a turn signal indicator control of the vehicle. The system (15) determines a turn indicator target speed limit in dependence on the turn indicator status signal and controls the vehicle in accordance with the turn indicator target speed limit.