Bus Braking Control Using Center of Gravity Shift Detection

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Solution Overview

Problem

Existing driver assistance technologies in commercial vehicles, such as buses, do not adequately account for the safety of both seated and standing passengers during sudden braking, leading to a higher risk for standing passengers.

Innovation Solution

A driver assistance device that determines the presence of standing passengers by analyzing the change in the vehicle's center of gravity during braking, adjusts deceleration rates based on the presence and percentage of standing passengers, and controls vehicle stopping to mitigate the risk of falls.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the vehicle applies strong braking to reduce stopping distance, then the stopping performance is improved, but the safety of standing passengers deteriorates due to increased risk of falls

Engineering Contradiction:

Improvestopping distanceVSAvoidrisk of falls for standing passengers

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The braking system dynamically adjusts the deceleration rate based on real-time detection of standing passengers. When standing passengers are detected, the system automatically reduces the deceleration rate to prevent falls, while allowing stronger braking when no standing passengers are present. This dynamic adjustment resolves the contradiction between stopping performance and passenger safety.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the braking parameter (deceleration rate) based on the detected occupancy state. By monitoring weight distribution changes that indicate standing passengers, the system modifies the braking intensity parameter to ensure safety, thus resolving the contradiction between rapid stopping and preventing passenger falls.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the vehicle uses a fixed deceleration rate for braking, then the control simplicity is improved, but the adaptability to different passenger conditions deteriorates

Engineering Contradiction:

Improvebraking control simplicityVSAvoidadaptability to standing passengers

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The braking system performs self-adjustment based on automatic detection of standing passengers through weight distribution monitoring. The system independently determines whether standing passengers are present and adjusts the deceleration rate accordingly, eliminating the need for manual intervention while maintaining simplicity and improving adaptability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates feedback from weight sensors that continuously monitor the distribution of weight between front and rear axles. This feedback mechanism detects the presence of standing passengers and triggers appropriate adjustments to the braking profile, resolving the contradiction between simple control and adaptive response.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures the safety of both seated and standing passengers by dynamically adjusting braking to minimize the risk of accidents, particularly by detecting the presence of standing passengers and adjusting deceleration limits based on real-time weight distribution changes.

Implementation Method 1

a processor that obtains, when braking, a value of a center of gravity point based on the stored weight value of the vehicle, the inter-axle distance value, the received first weight value, the received second weight value, the received deceleration value, and a preset gravitational acceleration value

Methodology Applied

Scientific EffectCenter of gravity:

Implementation Method 2

obtains a value of a center of gravity point based on the stored weight value of the vehicle, the inter-axle distance value, the received first weight value, the received second weight value

Methodology Applied

Scientific EffectWeight distribution:

Data Source

PatentUS12403915B2Advanced driver assistance systems and a vehicle having the same

Publication Date: 2025.09.02 HYUNDAI MOTOR CO LTD

AI summary

A vehicle includes a front wheel and a rear wheel, a first weight sensor for detecting an axle weight of the front wheel, a second weight sensor for detecting an axle weight of the rear wheel, and an acceleration sensor for detecting a deceleration of the vehicle. The vehicle further includes a memory for storing a weight value of the vehicle and an inter-axle distance value of the vehicle and a processor configured to control driving of the vehicle and, when braking during driving, to obtain a value of a center of gravity point based on the detected weight values, the deceleration, and inter-axle distance of the vehicle. The processor is configured to control the deceleration based on the obtained value of the center of gravity point. The vehicle includes a braking device for performing braking in response to a control command of the processor.