Vehicle Compressed Air Supply Device Simplification
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Solution Overview
Problem
The complexity of the vehicle compressed air supply device configuration is increased due to the need for a solenoid valve and control line to control the control valve, which complicates the system.
Innovation Solution
A vehicle compressed air supply device with a junction chamber, service brake pressure protection valve, parking brake pressure protection valve, and a valve unit that is a pressure protection valve with the same structure as the other valves, which is set to open at a higher pressure and close at a lower pressure than the service and parking brake valves, eliminating the need for a solenoid valve and simplifying the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a control valve with solenoid valve and control line is used to control parking brake air supply, then the parking brake can be controlled to remain engaged when service brake pressure is insufficient, but the device configuration becomes complicated
Solution Approach 1:
The invention extracts and eliminates the solenoid valve and control line from the system by using a purely pneumatic control mechanism. The control valve is designed to be automatically controlled by pneumatic pressure from the service brake circuit, removing the need for electrical control components while maintaining the safety function.
Solution Approach 2:
The control valve is designed to serve multiple functions: it controls the parking brake air supply based on service brake pressure conditions, and can also be manually operated. This multi-functionality reduces the need for separate control mechanisms and simplifies the overall system configuration.
2Adaptability or versatility
If different types of valves (control valve and pressure protection valves) are used in the system, then specific control functions can be achieved, but part production cannot be standardized
Solution Approach 1:
The invention uses asymmetric design in the valve body structure where a single valve body design can accommodate different valve functions through different positioning and connection configurations. This allows the same basic valve component to serve as control valve or pressure protection valve depending on its installation position and connection setup.
Solution Approach 2:
Instead of designing different valve structures for different functions, the invention inverts the approach by designing a universal valve body that can perform different functions through alternative configurations. The valve body is designed to be versatile rather than specialized, allowing it to function as different types of valves based on installation requirements.
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
This configuration allows for the simplification of the device by eliminating the need for a solenoid valve and control line, enabling common production of parts and reducing system complexity while ensuring the parking brake is not released until the service brake air pressure is sufficient.
Implementation Method 1
a valve seat which is provided at the partition wall; and valve body which abuts the valve seat with an elastic force respectively
Data Source
Figure 1
Figure 2(A)~2(B)
AI summary
Disclosed is a vehicle compressed air supply device, comprising pressure maintenance valves (44, 45) for service brakes, which are positioned between a junction chamber (38) and compressed air channels (51 a, 52a) for primary brakes; a pressure maintenance valve (48) for the parking brake, which is positioned between the junction chamber (38) and a compressed air channel (53a) for the parking brake; and a pressure maintenance valve (47), positioned on a supply path (41) that connects the pressure maintenance valve (48) for the parking brake with the junction chamber (38), and which is closed until the pressure of the compressed air that is supplied to the compressed air channels (51 a, 52a) for the primary brakes reaches a prescribed pressure value. The pressure maintenance valve (47) has the same structure as the pressure maintenance valves (44, 45) for service brakes and the pressure maintenance valve (48) for the parking brake.