Cylinder Crankcase Oil Return Channel Design
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Solution Overview
Problem
Existing engine designs with individual oil drains for each cylinder compromise compactness and structural integrity, as they either occupy significant space or weaken the cylinder head when oil from multiple cylinders converges.
Innovation Solution
An oil return collecting channel is integrated into the cylinder crankcase, collecting unpressurized oil from the cylinder head and directing it to vertically arranged oil drains, allowing for a clean and unobstructed structure in the cylinder head while creating space for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual oil drains are provided for each cylinder, then oil return function is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent merges the oil return functions of multiple cylinders into a single consolidated oil drain in the cylinder head. The oil return channel collects oil from all cylinder areas and directs it through one common drain, eliminating the need for multiple individual drains while maintaining effective oil return performance.
Solution Approach 2:
The single oil drain in the cylinder head serves as a universal drainage point for all cylinders. The oil return channel acts as a distribution system that gathers oil from multiple sources (individual cylinder areas) and channels it through a common pathway to the oil pan, making the system more compact and structurally sound.
2Device complexity
If fewer oil drains are used to improve compactness, then device complexity is reduced, but structural integrity of the cylinder head is weakened
Solution Approach 1:
By consolidating multiple oil drains into a single drain location in the cylinder head, the patent reduces the number of openings and fastening points required. This merging approach maintains structural integrity while achieving the desired compactness and reducing device complexity.
3Reliability
If individual oil drains are used for each cylinder, then oil return efficiency is improved, but installation space is increased
Solution Approach 1:
The patent combines multiple individual oil drain locations into a single consolidated drain in the cylinder head. The oil return channel system efficiently collects oil from all cylinder areas and directs it through this common drain, significantly reducing the space required for oil return infrastructure while maintaining effective oil drainage from all cylinders.
Solution Approach 2:
The oil return channel is arranged to extend in the longitudinal direction of the engine, utilizing the length of the engine block to create an efficient collection pathway. This spatial arrangement allows the channel to gather oil from multiple cylinder areas without requiring additional vertical or lateral space, effectively using the existing engine geometry to achieve compact oil return.
Data Source
Figure 1
AI summary
The invention relates to an internal combustion engine, in particular a diesel internal combustion engine with a cylinder crankcase (1), at least one oil return collecting channel (2), at least one oil drain (3), in which oil (4) flows, in a pressure free manner, in the direction of the oil pan, following gravity, and at least one cylinder (5).