Driver-Independent Braking Intervention After Collision
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Solution Overview
Problem
Existing vehicle braking systems fail to maintain effective driver-independent braking interventions after a collision, especially when the driver attempts to accelerate, as they cannot differentiate between acceleration and braking commands, and fail to continue braking when the engine torque influence is not possible due to interrupted energy supply.
Innovation Solution
A method that records the driver's accelerator operation and assesses whether engine torque influence is feasible; if not, the driver-independent braking intervention is maintained to prevent secondary collisions, and if feasible, it is discontinued to allow driver control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driver-independent braking intervention is maintained after collision, then safety is improved by preventing secondary collisions, but driver control is reduced when acceleration is actually possible
Solution Approach 1:
The system changes the operational state of the braking intervention based on detected parameters (energy supply status, accelerator operation). When energy supply is interrupted, braking is maintained; when energy supply is available and accelerator is operated, braking is discontinued. This dynamic parameter-based control resolves the contradiction between safety and driver control.
Solution Approach 2:
The system continuously monitors driver input via the accelerator and the actual engine torque response, then adjusts the braking intervention accordingly. This feedback mechanism ensures that braking is maintained only when necessary (when engine torque cannot respond), preserving both safety and appropriate driver control.
2Ease of operation
If braking intervention is discontinued when driver operates accelerator, then driver control is restored, but safety is compromised when engine torque influence is not actually possible
Solution Approach 1:
The system uses parameter detection (energy supply status, fuel pump operation, motor power supply) to determine whether accelerator operation can actually produce engine torque. This parameter-based decision-making ensures braking is discontinued only when engine response is actually possible, preventing safety compromises.
Solution Approach 2:
The control system acts as an intermediary between the driver's accelerator input and the braking intervention. It mediates by detecting whether the engine can actually respond to accelerator input, and only then allowing braking discontinuation. This intermediary function prevents premature braking release that would compromise safety.
3Measurement precision
If system continuously monitors energy supply status, then accuracy of braking decision is improved, but device complexity increases
Solution Approach 1:
The control system leverages existing multi-functional components (fuel pump control, motor power supply control, accelerator position sensors) that serve multiple purposes. By utilizing these existing components for collision braking decision-making, the system achieves high measurement precision without significantly increasing overall device complexity.
Solution Approach 2:
The system uses information already available from the vehicle's normal operation (fuel pump status, motor power supply state, accelerator position) to make collision braking decisions. This self-service approach allows accurate braking decisions without requiring separate dedicated monitoring systems, thus avoiding complexity increases.
Data Source
AI summary
In a method for maintaining a driver-independent braking intervention in a motor vehicle after a collision accelerator operation by the driver is detected; it is ascertained whether an engine torque influence via the accelerator can in fact be carried out; and when it is ascertained that the engine torque influence cannot be carried out, the driver-independent braking intervention is not broken off.