Integrated Hydraulic Valve Assembly for Compact Transmission Control
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Solution Overview
Problem
Hydraulic control units for automatic transmissions require separate installation spaces and complex connections for various hydraulic valves, leading to increased assembly complexity and space requirements.
Innovation Solution
A hydraulic control unit design featuring a valve bush, valve cover, valve slide, and spring, which are integrated into a housing part with a recess, allowing for simplified assembly and reduced space usage by using a stepped bore for alignment and connection, enabling the same unit to function as different valve types with minimal additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate hydraulic valves are used for different functions, then each valve can perform its specific function reliably, but the installation space and assembly complexity increase significantly
Solution Approach 1:
The patent combines multiple hydraulic valve functions into a single integrated valve body. Different valve functions (pressure control, flow control, directional control) are implemented within one unified structure that includes a valve bush, valve cover, and multiple valve slides, eliminating the need for separate valve components and reducing assembly complexity.
Solution Approach 2:
The valve body is designed as a universal component that can perform multiple hydraulic control functions simultaneously. The same valve body structure accommodates different types of valve slides (pressure control valve slide, flow control valve slide) that can be configured to provide various hydraulic functions depending on the application requirements.
2Reliability
If separate hydraulic valves are used for different functions, then each valve can be optimized for its specific purpose, but the installation space requirements increase
Solution Approach 1:
Multiple valve functions are merged into a single compact valve body structure. The valve bush, valve cover, and internal valve slides are integrated into one assembly that occupies significantly less space than multiple separate valves would require, while maintaining all necessary hydraulic control functions.
Solution Approach 2:
The valve slides are nested within the valve bush, which is itself housed within the valve cover assembly. This nested arrangement allows multiple functional elements to be compactly arranged within a small footprint, maximizing space utilization while maintaining functional independence of each valve element.
3Adaptability or versatility
If multiple separate valves are connected to the duct plate, then each valve can be independently controlled, but the number of ports and installation spaces increases
Solution Approach 1:
Multiple valve control functions are merged into a single integrated assembly that connects to the duct plate through one unified connection interface. The valve bush, valve cover, and internal valve slides form one assembly unit that reduces the number of separate connections required while maintaining independent control capability for each valve function.
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 reduces assembly complexity and space requirements while allowing for versatile valve functionality, such as volumetric flow rate control, pressure control, and pressure reduction, by using identical parts adapted for different functions within the hydraulic control unit.
Implementation Method 1
a spring (14), arranged within the valve bush (12), for preloading the valve slide (13) in a starting position
Implementation Method 2
The duct plate can, for example, be a casting. The valve plate can also be a casting. The hydraulic control unit can include the duct plate as well as the valve plate
Data Source
AI summary
A hydraulic control unit (4) includes a valve bush (12), a valve cover (15) partially closing the valve bush (12) on an end face (S1), a valve slide (13) guided in a longitudinal direction (L) within the valve bush (12), and a housing part (6). The housing part (6) includes a recess (8) matching an external contour of the valve bush (12). An intermediate plate (7) is configured to partially cover the valve cover (15). A spring (14) is arranged within the valve bush (12) and preloads the valve slide (13) in a starting position. The valve bush (12) is inserted, together with the valve cover (15), the valve slide (13), and the spring (14), into the recess (8) of the housing part (6) and jointly form a hydraulic valve (9). The valve bush (12) forms an inlet (19), and the valve cover (15) forms an outlet (31).