Segmented Oil-Feeding Gutter for Transmission Lubrication
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Solution Overview
Problem
Manual transmissions face challenges in ensuring sufficient lubrication of parts when the differential ring gear cannot pick up oil during reverse vehicle movement, leading to insufficient oil distribution, especially when the amount of oil stored in the transmission case is minimized for improved fuel efficiency.
Innovation Solution
An oil-feeding member with a gutter divided into first and second bottom portions, where the oil flows over both portions if the caught amount exceeds a predetermined amount, and only the first portion if it's below the threshold, optimizing oil distribution to targeted parts while reducing unnecessary oil usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the amount of oil stored in the transmission case is reduced to improve fuel efficiency and reduce weight, then fuel efficiency and weight are improved, but the ability to ensure sufficient lubrication during reverse movement deteriorates
Solution Approach 1:
The gutter bottom is segmented into first and second bottom portions at different heights. The first bottom portion receives oil during normal operation, while the second bottom portion receives additional oil during reverse movement when the differential ring gear cannot pick up oil. This segmentation allows the system to maintain reliable lubrication with reduced overall oil storage.
Solution Approach 2:
Different portions of the gutter bottom are given different properties - the first bottom portion is positioned to receive oil under normal conditions, while the second bottom portion is positioned lower to receive oil specifically during reverse movement. This local differentiation ensures that lubrication needs are met in different operational states without requiring large overall oil storage.
2Weight of moving object
If the amount of oil stored in the transmission case is reduced to reduce weight, then weight is reduced, but the ability to provide sufficient lubrication to all parts deteriorates
Solution Approach 1:
The gutter bottom is divided into first and second bottom portions at different heights. The first bottom portion handles oil distribution during normal forward movement, while the second bottom portion activates during reverse movement to ensure continuous lubrication coverage. This segmentation enables reduced oil storage while maintaining adequate lubrication for all transmission parts.
Solution Approach 2:
The oil distribution system dynamically adapts to different vehicle movement directions. During forward movement, oil is distributed through the first bottom portion. During reverse movement, the differential ring gear cannot pick up oil, so oil accumulates in the second bottom portion and is distributed accordingly. This dynamic adaptation ensures reliable lubrication coverage with minimized oil storage.
3Productivity
If the differential ring gear is used to pick up oil, then oil pickup is effective during forward movement, but the ability to pick up oil during reverse movement deteriorates
Solution Approach 1:
The gutter bottom is segmented into first and second bottom portions to handle different operational conditions. The first bottom portion works effectively during forward movement when the differential ring gear picks up oil. The second bottom portion activates during reverse movement when the differential ring gear cannot pick up oil, ensuring continuous lubrication supply.
Solution Approach 2:
The second bottom portion acts as an intermediary oil reservoir that receives oil directly from the oil storage when the differential ring gear cannot pick up oil during reverse movement. This intermediary structure ensures that lubrication continues without interruption despite the differential ring gear's inability to pick up oil in reverse.
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
Ensures consistent and targeted lubrication of transmission parts, reducing oil storage needs and minimizing oil agitation resistance, thereby enhancing fuel efficiency and reducing weight.
Implementation Method 1
The gutter guides the oil that has been caught from one side to the other of the transmission in an axial direction
Implementation Method 2
The oil-dripping hole allows the oil to drip to an intermediately placed part-to-be-lubricated
Data Source
AI summary
An oil-feeding member (100) catches oil picked up by a gear, and is provided with a gutter (132) guiding the oil from one side to the other of a transmission in an axial direction. The gutter (132) has a bottom which is divided into a first bottom portion (141) and a second bottom portion (142). The second bottom portion (142) is provided with an oil-dripping hole (142a, 142b). The first and second bottom portions (141, 142) are configured so that (i) the oil flows over only the first bottom portion (141) toward the other side if an amount of the oil caught by the oil-feeding member (100) is smaller than or equal to a predetermined amount, and that (ii) the oil flows over both of these bottom portions (141, 142) toward the other side if the amount of the oil is greater than the predetermined amount.