Vehicle Parking Brake Release Control With Override Code
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Solution Overview
Problem
Conventional systems fail to restrict the release of a vehicle parking brake when conditions exist that could pose safety risks or cause damage, despite the need to maintain the brake in an applied state under certain circumstances.
Innovation Solution
A system and method that control a vehicle parking brake by identifying conditions where the brake should remain applied, requiring an override code for release, ensuring safety by limiting operator access unless authorized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the parking brake is restricted from releasing when certain conditions exist, then safety risks and damage risks are reduced, but the operator's ability to release the parking brake is limited even when necessary
Solution Approach 1:
An override code serves as an intermediary mechanism that mediates between the safety restriction system and the operator's need to release the brake. The override code allows authorized operators to bypass safety restrictions when necessary, resolving the contradiction between maintaining safety protocols and enabling legitimate brake release operations.
Solution Approach 2:
The system changes the operational parameters of the parking brake release function based on detected conditions. When safety risks are present, the release parameter is restricted; when override authentication is provided, the parameter changes to allow release. This dynamic parameter adjustment resolves the contradiction between safety restrictions and operational flexibility.
2Object-affected harmful factors
If the parking brake remains applied to prevent safety risks, then potential damage and safety hazards are avoided, but the vehicle cannot move when movement is needed
Solution Approach 1:
The parking brake release restriction is made dynamic rather than static. The system continuously monitors conditions and dynamically adjusts the brake release state based on current safety requirements and operational needs. This allows the system to transition between restricted and unrestricted states, resolving the contradiction between maintaining safety and enabling mobility.
Solution Approach 2:
The system implements feedback mechanisms that monitor both safety conditions and operational requirements. When conditions change or override codes are entered, the feedback loop triggers a reevaluation of the brake state, allowing the vehicle to transition from a restricted applied state to a released mobile state when appropriate, thus resolving the contradiction between safety and mobility.
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
Restricts unsafe parking brake release while allowing necessary overrides, enhancing safety and preventing damage by maintaining the brake in applied states when conditions warrant, with authorized overrides.
Implementation Method 1
transmit the brake control signal to an electromechanical valve configured to control delivery of fluid pressure to the parking brake
Data Source
AI summary
A system for controlling a parking brake in a vehicle includes an operator interface configured to receive inputs from an operator of the vehicle including a first input requesting that the parking brake transition from an applied state to a released state. The system further includes a brake controller configured to identify a condition in which the parking brake should remain in the applied state. The controller generates, in the absence of the condition, a brake control signal responsive to the first input configured to cause the parking brake to transition from the applied state to the released state and transmits the brake control signal to an electromechanical valve configured to control delivery of fluid pressure to the parking brake. The controller disregards, in the presence of the condition, the first input unless the operator enters an override code comprising a predetermined sequence of inputs through the operator interface.