CVT Lid Component Groove Layout for Larger Electric Oil Pumps
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Solution Overview
Problem
Existing lid components for continuously variable transmissions do not efficiently accommodate larger electric oil pump components, leading to poor layout and increased size of the transmission system.
Innovation Solution
A lid component with a recessed groove on one surface to accommodate at least a part of the electric oil pump, allowing for a more compact design without extending the transmission case or lid components in the vehicle front-rear direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electric oil pump size is increased, then the pump capacity is improved, but the layout space requirement increases
Solution Approach 1:
The patent applies nesting by placing the electric oil pump inside the accommodation groove formed on the lid component. The pump is nested within the recessed space of the groove, allowing it to be accommodated within the existing lid boundaries rather than requiring additional external space. This resolves the contradiction by enabling increased pump capacity while maintaining compact layout space through hierarchical spatial arrangement.
Solution Approach 2:
The patent utilizes dimensional change by forming an accommodation groove that creates vertical depth (third dimension) on the lid component surface. Instead of expanding the pump size horizontally which would increase layout area, the groove provides vertical accommodation space, allowing the pump to be positioned in a recessed manner. This transforms the space utilization from two-dimensional surface expansion to three-dimensional volumetric arrangement, resolving the space conflict.
2Length of moving object
If the transmission case or lid components are extended to accommodate larger pumps, then the pump size is increased, but the overall transmission system size increases
Solution Approach 1:
The electric oil pump is nested within the accommodation groove of the lid component, which itself is attached to the transmission case. This nested arrangement allows the pump to be housed within the existing lid boundaries without requiring extension of the transmission case. The pump dimension can be increased while the transmission case length remains unchanged, as the pump is contained within the groove structure rather than extending outward.
Solution Approach 2:
The accommodation groove introduces a vertical dimension (depth) to accommodate the pump, rather than requiring horizontal extension of the transmission case. The groove forms a recessed space that allows the pump to be positioned in the vertical direction within the existing case envelope. This dimensional transformation enables increased pump length without proportional increase in transmission case length.
Data Source
AI summary
A lid component is arranged to face an electric oil pump. The lid component includes an accommodation groove that accommodates at least a part of the electric oil pump on a surface side from which a lid-side connector protrudes.