Portable CO2 Brake Release for Locked Spring-Apply Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spring applied, hydraulically released park brakes can become locked in the applied position due to disruptions in electric and hydraulic systems or solenoid valve failures, preventing vehicle movement for service.
Innovation Solution
A portable hydraulic park brake release apparatus using a CO2 cartridge is introduced into the hydraulic conduit to override the spring force, allowing the park brake to be released, which includes a portable adapter and a CO2 cartridge that replaces the solenoid valve, injecting CO2 gas to increase hydraulic fluid volume and overcome the spring force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring applied, hydraulically released park brake system is used, then the brake can be reliably applied and released under normal conditions, but the system can become locked in the applied position due to disruptions in electric and hydraulic systems or solenoid valve failures
Solution Approach 1:
A portable adapter assembly serves as an intermediary device that connects to the vehicle's hydraulic fitting interface and introduces CO2 gas into the hydraulic conduit. This mediator bypasses the failed solenoid valve and electric-hydraulic system, directly injecting gas to overcome spring force and release the brake, thereby resolving the contradiction between system reliability and ease of emergency operation
Solution Approach 2:
The system uses a disposable CO2 cartridge that can be quickly inserted into the portable adapter to release the brake in emergency situations. This inexpensive, single-use component provides a simple solution for overcoming system failures without requiring complex repair equipment or specialized tools, improving ease of emergency operation while maintaining overall system reliability
2Ease of operation
If a portable CO2 cartridge system is introduced to release the park brake, then emergency brake release is enabled, but the system complexity increases due to additional portable components and procedures
Solution Approach 1:
The emergency release system is segmented into separate, independent components: a portable adapter assembly with hydraulic fitting interface and a removable CO2 cartridge. This segmentation allows the components to be stored separately, transported easily, and assembled quickly at the scene of brake failure, reducing the perceived complexity while maintaining ease of emergency operation
Solution Approach 2:
The portable adapter assembly is designed to be self-contained with all necessary sealing and connection components integrated into the adapter itself. The CO2 cartridge is a self-contained pressure source that requires no external activation mechanism. This self-service design reduces operational complexity by eliminating the need for external tools, power sources, or complex assembly procedures
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
Enables the release of the park brake in emergency situations, allowing the vehicle to be towed for service without aeration issues in hydraulic pumps, thus preventing noise and performance problems.
Implementation Method 1
introducing CO2 gas into the hydraulic conduit to increase hydraulic fluid volume and overcome the spring force
Data Source
AI summary
An assembly for a work vehicle includes an emergency portable hydraulic park brake release assembly for a spring applied, hydraulically released park brake. The portable hydraulic park brake release assembly includes a CO2 cartridge which is activated when the park brake is in the applied position. This causes gas from the CO2 cartridge to be introduced into a hydraulic conduit of the park brake to move to move the park brake to the released position. A method of operating same is also provided.