Air Parking Brake Valve With Electromagnetic Self-Locking Control
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Solution Overview
Problem
Conventional air parking brake systems rely on manual operation, which is unreliable for keeping vehicles stationary, and the transition to electric control systems is costly and complex.
Innovation Solution
An air parking brake electric control valve with an air valve unit and self-lock unit, featuring a main valve body, auxiliary valve body, valve core, and electromagnetic assemblies, allowing for electrically controlled switching between positions to maintain or release brake function without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual operation is used to control the parking brake, then the system structure is simple, but the reliability is poor
Solution Approach 1:
The patent replaces the manual mechanical operation system with an electric control system. The electromagnetic assembly converts electrical signals into mechanical motion to control the valve core, which in turn controls air flow to the brake chamber. This substitution improves reliability by eliminating manual operation errors while maintaining system simplicity through direct electromagnetic- mechanical conversion.
Solution Approach 2:
The self-lock unit implements automatic locking functionality where the valve core automatically maintains its position after being actuated by the electromagnetic assembly. The spring mechanism provides automatic return to the initial position when power is removed, creating a self-service system that maintains parking brake function without continuous power or manual intervention.
2Reliability
If electric control system is introduced to replace manual control, then the reliability improves, but the cost and complexity increase
Solution Approach 1:
The patent divides the electric control system into two independent functional units: the air valve unit for controlling air flow and the self-lock unit for maintaining position. This segmentation allows each unit to be manufactured and assembled separately using existing components, reducing overall manufacturing cost and complexity while achieving reliable electric control functionality.
Solution Approach 2:
The valve core serves multiple functions: it acts as a plunger to control air flow in the air valve unit, a locking element in the self-lock unit, and a mechanical connector between the electromagnetic assembly and the air passage. This multi-functionality reduces the number of separate components needed, thereby lowering manufacturing cost while maintaining control reliability.
3Measurement precision
If conventional electric control components like pressure sensors and ECUs are used, then the control precision improves, but the device complexity and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the need for pressure sensors and ECUs from the conventional electric control system. Instead of using electronic feedback loops with sensors, the system uses a direct electromagnetic- mechanical connection where the electromagnetic assembly's position directly determines the valve core position, which in turn controls air flow. This extraction maintains sufficient control precision for parking brake applications while dramatically reducing system complexity.
Solution Approach 2:
The valve core acts as an intermediary element that directly translates the electromagnetic assembly's linear motion into air flow control without requiring electronic sensing or processing intermediaries. The mechanical coupling between the electromagnetic assembly and valve core provides inherent position feedback, eliminating the need for separate measurement devices while maintaining control precision.
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 reliable electric control of brake systems, reducing costs and complexity by integrating with existing air brake systems, allowing for efficient service and parking brake functions without the need for expensive pressure sensors.
Implementation Method 1
The valve core is driven by the first electromagnetic assembly to move between a first action position and a second action position
Implementation Method 2
The second electromagnetic assembly includes a coil, a movable column that is driven by the coil, and a self-lock spring that abuts against the movable column
Implementation Method 3
a self-lock spring that abuts against the movable column. The movable column of the second electromagnetic assembly is operable to move between a release position and a lock position
Data Source
AI summary
An air parking brake electric control valve includes an air valve unit and a self-lock unit. The air valve unit includes a main valve body, an auxiliary valve body, a valve core and a first electromagnetic assembly. The valve core is driven by the first electromagnetic assembly to move between a first action position and a second action position. The self-lock unit is disposed on the auxiliary valve body, and includes a second electromagnetic assembly. The second electromagnetic assembly includes a movable column operable to move between a release position and a lock position.