Variable Displacement Compressor Control Valve Assembly
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Solution Overview
Problem
The existing variable displacement compressor systems face challenges in examining and easily disposing the second control valve before incorporation, due to restricted layouts and inability to assess the abutment states between valve components.
Innovation Solution
The system incorporates a second control valve with a back pressure chamber, a valve chamber, and a spool mechanism that adjusts the opening degree of the pressure release passage based on pressure differences, allowing for examination and easy disposition by utilizing a spool with a pressure receiving portion and a valve portion connected via a shaft, and a partition member that facilitates the adjustment of the valve hole opening degree.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second control valve is designed with fixed accommodation in the cylinder block, then the valve components can be assembled, but the abutment states cannot be examined and the layout is restricted
Solution Approach 1:
The second control valve is divided into separable components: the spool (with pressure receiving portion and valve portion), the partition member, and the valve seat forming ring. This segmentation allows the components to be assembled and examined separately before final installation, enabling verification of abutment states without being constrained by the final installed layout.
Solution Approach 2:
The invention enables preliminary examination and adjustment of the second control valve components before they are permanently installed in the cylinder block. The spool and partition member can be assembled and their abutment states verified in advance, allowing for adjustments to be made before final incorporation into the compressor system.
2Ease of manufacture
If the valve components are assembled in the final configuration, then the system is complete, but the abutment states between components cannot be examined or adjusted
Solution Approach 1:
The spool is designed as a movable component that can shift position within the valve assembly. The pressure receiving portion can move relative to the partition member, allowing the abutment states to be dynamically adjusted and examined during the assembly and examination process, rather than being fixed in a single static configuration.
Solution Approach 2:
The partition member serves as an intermediary element between the pressure receiving portion and the valve portion. It provides a reference surface for examining abutment states and allows for adjustment of the spool position relative to the valve seat forming ring, enabling precision verification before final assembly.
3Device complexity
If the second control valve is designed for direct installation in the cylinder head, then the layout is simplified, but the components cannot be disposed with ease or examined before incorporation
Solution Approach 1:
The second control valve components (spool, partition member, valve seat forming ring) are designed as separable segments that can be assembled and examined independently. This segmentation allows for easy disposal and reassembly of components without requiring disassembly of the entire cylinder head, combining layout simplicity with operational ease.
Solution Approach 2:
The components are designed to allow preliminary assembly and examination outside the final installation position. The spool and partition member can be assembled and their abutment states verified before being installed in the cylinder head, making the installation process easier and more reliable.
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 enables the examination of the second control valve before incorporation and allows for easy disposition, ensuring appropriate abutment states and improved operational efficiency.
Implementation Method 1
a force of moving the spool in a direction of approaching the valve hole by a pressure applied to the pressure receiving portion
Implementation Method 2
the valve portion abuts on the wall surface of the valve chamber, to thereby close the valve hole
Implementation Method 3
when the first control valve is opened and a force of moving the spool in a direction of approaching the valve hole by a pressure applied to the pressure receiving portion becomes larger than a force of moving the spool in a direction of separating from the valve hole by a pressure applied to the valve portion
Data Source
AI summary
Variable displacement compressor 100 has second control valve 350 for adjusting the opening degree of pressure release passage 146. Second control valve 350 includes partition member 351, which partitions valve chamber 351c and back pressure chamber 351d, and has side wall 351a surrounding valve portion 352b of spool 352, and end wall 351b connected to one end side of side wall 351a and through which shaft portion 352b of spool 352 penetrates. Furthermore, in second control valve 350, end surface 351a1 opposite to the end wall of the side wall of partition member 351 abuts on the wall surface opposite to the back pressure chamber of the valve chamber 351c. When the valve portion 352b of spool 352 abuts on the wall surface, pressure receiving portion 352a of spool 352 abuts on end wall 351b.