Cylinder Head Oil Return Pump for Horizontal Engine Drainage
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Solution Overview
Problem
In internal combustion engines with cylinders inclined or horizontal, oil stagnates in the lower part of the cylinder head due to high temperatures, leading to oil seepage and smoke issues, particularly during sudden braking or acceleration.
Innovation Solution
An oil return pump is integrated into the cylinder head, driven by the distribution system, which sucks oil from the low point and returns it to the main engine casing, effectively addressing the oil stagnation and seepage issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cylinder head is positioned horizontally or inclined below the horizontal plane, then the engine architecture allows for specific vehicle configurations (flat-six engine, flat-twin motorcycle, aerobatic aircraft), but oil stagnates in the lower part of the head causing seepage and smoke
Solution Approach 1:
The invention extracts the harmful element (stagnant oil) from the cylinder head by introducing a pump that actively removes oil from the lower part of the head and returns it to the crankcase. This extraction principle directly addresses the oil stagnation problem while preserving the flexible engine architecture.
Solution Approach 2:
The pump performs preliminary action by proactively removing oil from the cylinder head before it can accumulate to harmful levels. The system continuously prevents oil stagnation rather than reacting to it, thereby eliminating seepage and smoke issues before they occur.
2Ease of operation
If gravity-based oil drainage is used in vertical engines, then oil drainage is simple, but in horizontal or inclined engines oil accumulates in the lower cylinder head
Solution Approach 1:
The invention replaces the passive gravity-based drainage system with an active mechanical pump system. The pump is driven by the distribution system and actively transports oil from the lower cylinder head to the crankcase, ensuring reliable drainage regardless of engine orientation while maintaining operational simplicity through integration with the existing distribution system.
3Reliability
If a pump is introduced to drain oil from the cylinder head, then oil stagnation is prevented, but the device complexity increases
Solution Approach 1:
The invention merges the pump function with the existing distribution system by driving the pump off the distribution system's rotational movement. The pump body is integrated into the cylinder head structure itself, combining multiple functions (oil drainage, structural support) into a single integrated component, thereby minimizing the increase in device complexity.
Solution Approach 2:
The distribution system serves multiple functions: it continues to distribute oil to the engine components while simultaneously driving the pump to drain oil from the cylinder head. This multi-functionality approach reduces the need for separate dedicated systems and minimizes overall device complexity.
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
The solution prevents oil seepage and smoke by efficiently draining lubricating oil from the cylinder head, maintaining engine performance during various driving conditions.
Implementation Method 1
the said pump is a trochoidal pump
Data Source
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AI summary
The invention relates to an internal combustion engine comprising at least one cylinder that is horizontal or inclined below the horizontal plane, including a cylinder head (1) provided with lubrication means, and a distribution system. The cylinder head (1) comprises an oil return pump drawing the oil into the low point of the cylinder-head cover (18) and discharging the oil towards the main crankcase of the engine.