Proportional Pressure Valve Without Longitudinal Drilled Hole
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Solution Overview
Problem
The production of longitudinal drilled holes in existing proportional pressure reducing valves is costly and time-consuming, limiting the cost-effectiveness and efficiency of these valves, particularly in applications like hydraulically controlled clutches.
Innovation Solution
A valve design that eliminates the longitudinal drilled hole by shifting the pressure-active measuring surface to the region of the consumer port, allowing for a larger valve piston diameter and reducing flow resistance without increasing installation space, while maintaining proportional pressure control through a pressure-active measuring surface on the valve piston.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a longitudinal drilled hole is used to connect the valve chamber to the consumer port, then fluid connection is achieved, but production cost and machining time increase significantly
Solution Approach 1:
The invention extracts and eliminates the longitudinal drilled hole from the valve housing design. Instead of drilling through the housing, the pressure-active measuring surface is now formed directly on the valve piston in the consumer port region, removing the need for the costly and time-consuming longitudinal hole while maintaining fluid connection functionality.
Solution Approach 2:
The invention merges the function of the longitudinal drilled hole connection with the valve piston structure itself. The pressure-active measuring surface on the valve piston combines the fluid connection function with the piston's structural role, eliminating the separate longitudinal hole and reducing production complexity.
2Productivity
If the valve piston diameter is increased to reduce flow resistance, then flow performance improves, but installation space requirements increase
Solution Approach 1:
The invention optimizes the valve piston diameter in the radial dimension while utilizing the axial dimension efficiently. By positioning the pressure-active measuring surface directly on the piston in the consumer port region, the design achieves large flow cross-sections through optimized radial dimensions without requiring increased axial length or overall installation space.
3Speed
If rapid switching during cold starts is achieved, then valve responsiveness improves, but flow resistance increases
Solution Approach 1:
The invention applies local quality optimization by creating a pressure-active measuring surface with specific local characteristics in the consumer port region. This localized design enables rapid switching response where needed while maintaining adequate flow cross-sections to minimize overall flow resistance, balancing responsiveness with flow performance.
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 new valve design enables rapid switching during cold starts and reduces flow resistance, achieving large opening cross-sections without the need for expensive actuating devices, ensuring reliable and cost-effective operation in hydraulically controlled clutches.
Implementation Method 1
the valve piston can be actuated by means of an actuating solenoid to produce either a fluid-conducting connection
Implementation Method 2
The control pressure occurring during operation then acts in this respect against the said annular or measuring surface and causes an axial force which counteracts a magnetic force of the actuating solenoid
Data Source
AI summary
The invention relates to a valve, in particular a proportional pressure regulating valve, comprising a valve housing (10) and a valve piston (12) which is arranged in the valve housing in a longitudinal a movable manner and which can be actuated by means of an actuation magnet (14) so as to produce either a fluidic connection between a pressure supply connection (P) and a load connection (A) or between the load connection (A) and a return connection (T) in the valve housing (10), wherein the valve piston (12) is permanently fluidically connected to the return connection (T) at the opposing end faces (44, 46) of the valve piston. The invention is characterized in that the valve piston (12) has a pressure-active measuring surface (50) in the region of the load connection (A), said pressure-active measuring surface providing the respective fluid pressure at the load connection (A) as a counterforce to the actuation force of the actuation magnet (14) when the actuation magnet (14) is energized in order to produce a fluidic connection between the pressure supply connection (P) and the load connection (A).