Predictive Brake Control for One-Pedal Driving Rest
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Solution Overview
Problem
Vehicles at rest without driver intervention may unintentionally move due to the lack of engaged friction or hydraulic brakes, posing a risk to occupants in case of unexpected impacts, especially in one-pedal driving systems where regenerative braking is used.
Innovation Solution
A brake control system that includes sensors and an electronic control unit to detect vehicle motion and external conditions, predicting brake application events and automatically engaging the brakes to prevent movement, even when the driver is not depressing the brake pedal, based on stored driver behavior patterns and environmental data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If one-pedal driving with regenerative braking is used, then the ease of operation is improved, but the reliability deteriorates due to lack of friction brake engagement at rest
Solution Approach 1:
The system performs preliminary detection of vehicle rest conditions and predictive analysis of potential brake application events before actual impact occurs. The electronic control unit continuously monitors sensor data and predicts brake application events in advance, allowing the system to prepare and apply friction brakes proactively rather than reactively, thus preventing unintended movement before it can occur.
Solution Approach 2:
The system implements continuous feedback loops where sensors detect vehicle motion status, external environment conditions, and brake pedal state, which are then processed by the electronic control unit to determine whether to apply brakes. The system adjusts brake application based on real-time feedback from multiple sensors, creating a closed-loop control system that maintains reliability while preserving one-pedal driving operation.
2Reliability
If automatic brake application is implemented, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The electronic control unit serves multiple functions: it determines vehicle rest conditions, predicts brake application events, controls friction brake application, and integrates data from multiple sensors. By consolidating these functions into a single control unit rather than separate systems, the patent reduces overall device complexity while maintaining the reliability benefits of automatic brake application.
Solution Approach 2:
The system merges the detection of vehicle rest conditions, prediction of brake events, and control of friction brakes into an integrated automatic brake control system. This consolidation reduces the number of separate components and simplifies the overall system architecture compared to having independent systems for each function.
3Reliability
If friction brakes are automatically applied at rest, then the reliability is improved, but the ease of operation deteriorates due to unintended brake engagement
Solution Approach 1:
The system applies preliminary anti-action by detecting vehicle rest conditions and predicting potential brake application events before unintended movement can occur. By proactively applying friction brakes in predicted scenarios, the system prevents harmful unintended movement while avoiding unnecessary brake engagement through accurate prediction algorithms that distinguish between normal and abnormal conditions.
Solution Approach 2:
The system dynamically adjusts brake application based on real-time conditions rather than using a static on/off approach. The electronic control unit continuously evaluates sensor data and modifies brake application accordingly, allowing the system to adapt to changing conditions and avoid unintended brake engagement while maintaining reliability when needed.
Data Source
AI summary
Methods, systems, and apparatus for controlling the braking of a vehicle. The brake control system includes a first sensor for detecting motion data of the vehicle and an electronic control unit connected to the first sensor. The electronic control unit is configured to determine that the vehicle is not in motion based on the motion data. The electronic control unit is configured to predict a brake application event that requires application of a braking force to prevent the vehicle from moving and cause brakes of the vehicle to apply the braking force to prevent the vehicle from moving based on the brake application event.