Hybrid Transmission Valve Body Relocation for Fastener Clearance
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Solution Overview
Problem
In modular hybrid transmissions, the valve body typically protrudes from the front module housing at the 6 o'clock position, which interferes with the installation on engines with structural oil pans that have fasteners at this location, preventing proper mounting.
Innovation Solution
The valve body is relocated to the periphery of the housing circumferentially from the bottom center position to provide clearance for fasteners, allowing for secure mounting of the front module to the engine without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the valve body is located at the 6 o'clock position (bottom center) of the housing periphery, then the valve body can be positioned in a conventional location that works for engines with steel oil pans, but it interferes with the installation of fasteners on engines with structural oil pans
Solution Approach 1:
The valve body is repositioned from the conventional 6 o'clock position to a different circumferential location on the housing periphery. This local change in position allows the fastener to be installed at the 6 o'clock position without interference, while the valve body maintains its functional integrity at the new location. The solution applies local quality by making a specific positional adjustment only where the conflict occurs, rather than redesigning the entire assembly.
2Ease of operation
If the valve body is relocated circumferentially from the bottom center position, then clearance is provided for fasteners at the 6 o'clock position, but the valve body must be positioned at a non-conventional location
Solution Approach 1:
The valve body is moved along the circumferential dimension of the housing periphery, changing its angular position relative to the 6 o'clock position. This dimensional change in the circumferential direction creates the necessary clearance for fastener installation while maintaining the valve body's radial distance from the center axis, thus preserving its functional relationship with internal components.
Data Source
AI summary
A front module housing an electric motor/generator and an engine disconnect clutch for a modular hybrid transmission includes a valve body that houses a hydraulic valve which operates the engine disconnect clutch. The valve body is located at an angle relative to the bottom of the front module, providing fastener clearance for mounting the front module to an internal combustion engine.