Cylinder Head Oil Supply Layout for Reliable Cam Lubrication
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Solution Overview
Problem
Existing internal combustion engines face challenges in reliably supplying lubricant to friction points between the cam and follower, and the complexity of closing oil supply boreholes in the cylinder head increases manufacturing costs.
Innovation Solution
An internal combustion engine design with an oil supply system situated at the top face of the cylinder head, providing lubrication to camshaft and rocker arm brackets through an oil supply line, which includes an oil pressure valve to manage pressure during cold starts, reducing manufacturing costs and ensuring reliable lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil supply boreholes are implemented in the cylinder head, then lubrication can be provided to the cam drive, but the complexity of closing these boreholes increases manufacturing costs
Solution Approach 1:
The invention extracts the oil supply function from the traditional borehole configuration and relocates it to the valve cover frame. The oil supply line is now integrated into the valve cover frame rather than requiring boreholes through the cylinder head, thereby eliminating the complexity of closing boreholes while maintaining lubrication functionality.
Solution Approach 2:
The valve cover frame serves as an intermediary component that houses the oil supply line and provides lubrication to the cam drive. This intermediary structure eliminates the need for direct boreholes through the cylinder head, simplifying manufacturing while ensuring reliable oil delivery to friction points.
2Reliability
If traditional oil supply systems are used, then lubrication paths are established, but friction points between cam and follower are not reliably supplied with oil
Solution Approach 1:
The invention changes the spatial arrangement of the oil supply system by moving from internal cylinder head boreholes to an external valve cover frame configuration. This dimensional repositioning allows for better oil delivery positioning and more reliable lubrication of friction points while simplifying the overall system structure.
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 design ensures reliable lubrication of friction points and reduces manufacturing costs by simplifying the oil supply system and managing high oil pressures during cold starts.
Implementation Method 1
an oil supply line (9), which includes an oil pressure valve (14)
Implementation Method 2
an oil supply line (9), with the aid of which the required locations can be supplied with lubricant
Data Source
AI summary
An internal combustion engine includes at least one cylinder crankcase, at least one cylinder head (1), at least one overhead camshaft (2), at least two rocker arms (3) which are driven by the camshaft (2) and actuate the combustion valves, the camshaft(s) (2) being mounted in the cylinder head housing, and an oil supply line (9) which is situated in particular in the area of the top face of the cylinder head (1) for lubricating camshaft bearing brackets (10) and the rocker arm brackets (11).