Transmission Oil Pan Structure for Suction Port Clearance
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Solution Overview
Problem
The existing oil storage structure in transmission cases faces a reduction in suction port opening area when the bottom wall of the oil pan deforms upon collision with a curb, potentially obstructing oil suction.
Innovation Solution
The oil storage structure incorporates a protruding portion on the bottom wall of the oil pan that faces the suction port of the strainer, which pushes the suction port upward upon deformation, maintaining the distance and opening area for efficient oil suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction port is arranged close to the bottom wall portion to maximize opening area, then the suction efficiency is improved, but the opening area is reduced when the bottom wall deforms upon collision
Solution Approach 1:
The protruding portion is provided on the bottom wall portion in advance, positioned to contact the suction port when deformation occurs. This preliminary structural arrangement prevents the suction port from being obstructed by the deformed bottom wall, thereby maintaining the opening area and suction efficiency even after collision with a curb
2Reliability
If the suction port is arranged with a large gap from the bottom wall portion to prevent contact during deformation, then the reliability is improved, but the opening area is reduced and suction efficiency deteriorates
Solution Approach 1:
The protruding portion is provided on the bottom wall portion in advance, positioned to contact the suction port when deformation occurs. This preliminary structural arrangement prevents the suction port from being obstructed by the deformed bottom wall, thereby maintaining the opening area and suction efficiency even after collision with a curb
Data Source
AI summary
The oil storage structure includes an oil pan that closes a lower opening of the transmission case and forms an oil pool in a lower space inside the transmission case, and a strainer having a suction port for oil located in the oil pool. The suction port for the oil is provided so as to face a bottom wall portion of the oil pan with a gap in between, and the bottom wall portion of the oil pan is provided with a protruding portion protruding toward the suction port, with the protruding portion being formed in a direction across the suction port as viewed from the bottom wall portion.