Hydraulic Oil Control Valve Layout for Low-Loss Check Flow
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Solution Overview
Problem
Existing hydraulic oil control valves experience increased flow passage pressure loss and unintentional passage blockage due to the radial deformation of check valves, which can lead to inefficient hydraulic oil flow and valve timing adjustments in engine systems.
Innovation Solution
A hydraulic oil control valve design featuring a supply check valve that allows hydraulic oil to flow directly into an axial passage without bypassing, and movement limiting portions to prevent blockage, ensuring efficient oil flow and valve timing adjustments by minimizing pressure loss and blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is placed in an annular space between outer sleeve and inner sleeve to control hydraulic oil flow, then the valve can control flow direction, but the radial deformation of the check valve causes increased flow passage pressure loss and unintentional passage blockage
Solution Approach 1:
The check valve is extracted from the annular space configuration and repositioned to engage directly with the supply passage. This extraction eliminates the problematic interaction between radial valve deformation and the annular flow path, removing the source of pressure loss while preserving the check valve's flow control function.
Solution Approach 2:
The invention changes the spatial dimension of valve operation from radial deformation in an annular space to axial engagement with the supply passage. By transitioning from radial to axial dimensional control, the valve achieves reliable flow control without the pressure loss associated with radial deformation in the annular region.
2Ease of operation
If a check valve is resiliently deformable in radial direction to control flow, then the valve can respond to pressure changes, but this radial deformation causes unintentional passage blockage
Solution Approach 1:
The check valve is extracted from the annular space where radial deformation caused blockage, and repositioned to engage directly with the supply passage. This extraction removes the valve from the problematic radial deformation zone while maintaining its pressure-responsive flow control capability through direct supply passage engagement.
Solution Approach 2:
Instead of allowing radial deformation to control flow in the annular space, the invention inverts the approach by having the valve engage the supply passage directly. The valve's deformation or movement now occurs in a manner that opens the supply passage rather than potentially blocking it, reversing the harmful effect into a beneficial one.
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
The design enhances the responsiveness and efficiency of valve timing adjustment devices by reducing pressure loss and preventing unintentional blockages, thereby improving the overall performance and accuracy of engine valve timing control.
Implementation Method 1
The supply check valve is configured to enable a flow of the hydraulic oil from the supply passage toward the axial passage
Implementation Method 2
a check valve, which is resiliently deformable in a radial direction
Data Source
AI summary
A supply passage extends through an inner sleeve in a radial direction and conducts hydraulic oil received from a hydraulic oil supply source. An axial passage is located between an outer sleeve and the inner sleeve and extends in an axial direction. The supply passage opens to one end portion of the axial passage while another end portion of the axial passage is configured to connect with a valve timing adjustment device. A supply check valve is installed in the axial passage and is located on a radial side of the supply passage where a radially outer side of the inner sleeve is placed. The supply check valve enables a flow of the hydraulic oil from the supply passage toward the axial passage and limits a flow of the hydraulic oil from the axial passage toward the supply passage.