Internal Combustion Engine Oil Circulation Structure
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Solution Overview
Problem
The distribution of lubrication oil in the cylinder head of an internal combustion engine becomes biased during vehicle travel conditions such as acceleration and deceleration, leading to a shortage of lubrication for components like gears due to uneven flow into oil dropping holes.
Innovation Solution
The engine features oil dropping holes at the corners of the cylinder head, connected by oil channels that guide the lubrication oil to the driving gear, ensuring consistent lubrication even with biased oil distribution, eliminating the need for a separate oil supply system for the gear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the oil dropping hole is provided in the vicinity of the sides of the cylinder head, then the structure is simplified, but the oil distribution becomes biased during acceleration and deceleration, causing lubrication shortage
Solution Approach 1:
The single oil dropping hole is segmented into multiple oil dropping holes (at least two) positioned at different locations in the base part of the cylinder head. This segmentation allows oil to be collected from multiple points, ensuring that at least one hole remains close to the oil pan regardless of vehicle orientation during acceleration or deceleration, thus maintaining reliable lubrication while keeping the structure simple.
2Reliability
If the oil dropping hole is positioned to facilitate oil flow, then lubrication is improved, but the oil supply to the driving gear becomes insufficient
Solution Approach 1:
An oil channel is introduced as an intermediary component that connects the oil dropping hole to the driving gear. This channel actively guides and transports oil from the collection point to the gear, ensuring that even when oil distribution is biased, sufficient lubrication reaches the driving gear without compromising overall oil flow efficiency.
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
This configuration ensures stable lubrication for the driving gear, reducing friction and preventing lubrication shortages, while simplifying the engine's design by integrating the oil circulation and supply mechanisms.
Implementation Method 1
the supplied oil flows into an oil dropping hole provided inside in the cylinder head. After flowing into the oil dropping hole, the lubrication oil flows down through the cylinder block located in the base part of the cylinder head
Data Source
AI summary
Provided is an internal combustion engine having an oil circulating structure wherein oil used to lubricate valve operating members in the cylinder head drops onto an oil pan, and the oil accumulated therein is drawn up to the cylinder head again. Each on corners of the squire bottom face inside the cylinder head of the internal combustion engine, an oil dropping hole is provided to allow the oil used to lubricate valve operating members to flow thereinto. Also provided is an oil channel communicating with one or more of the oil dropping hole at the bottom thereof to guide the oil toward the driving gear transmitting the driving force of the engine.