Spring-Operated Pin for Residual Oil Drainage in Exchangeable Filters
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Solution Overview
Problem
Residual oil remains in the engine when the exchangeable oil filter is replaced in internal combustion engines, leading to inefficiencies and potential contamination.
Innovation Solution
An elastically pretensioned pin acts as a valve, keeping the outflow open during oil circulation and closing channels to the oil pump and crankcase, but automatically opening them when the oil filter is removed to allow residual oil to drain under gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a drainage pin is provided in the exchangeable oil filter, then residual oil can drain during filter replacement, but the device complexity increases due to additional valve mechanisms
Solution Approach 1:
The drainage pin is integrated directly into the exchangeable oil filter assembly, combining the filtering function and drainage function into a single component. The pin serves dual purposes: as a structural element of the filter and as a valve mechanism for draining residual oil, eliminating the need for separate drainage systems.
Solution Approach 2:
The spring-operated pin automatically activates to open drainage passages when the oil filter is removed, without requiring external control mechanisms. The spring force self-activates the drainage function based on the filter removal action itself, simplifying the overall system control while ensuring reliable oil drainage.
2Reliability
If the pin acts as a valve to close channels during operation, then oil circulation is maintained, but the ease of operation decreases due to automatic valve activation requirements
Solution Approach 1:
The pin is designed as a dynamic component that automatically changes position based on operational conditions. During normal operation, spring force keeps the pin in a position that closes drainage passages while allowing oil circulation. When the filter is removed, the pin automatically shifts to open the drainage passages, providing adaptive functionality without complex control systems.
Solution Approach 2:
The valve mechanism is self-activating through spring force that responds to the filter removal action. No additional actuators, sensors, or control systems are needed - the mechanical action of removing the filter directly triggers the pin to move and open drainage passages, maintaining ease of operation while ensuring reliable automatic valve function.
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 that residual oil is effectively removed from the engine during oil filter replacement, preventing contamination and improving maintenance efficiency.
Implementation Method 1
a helical spring (22) which can be compressed by reducing the distance between the contact surface (20) and the bearing surface (21) of the pin (14)
Implementation Method 2
so that the residual oil in the region of the outflow and in the region of the channel as well as within the pin can automatically run out, i.e., under the action of gravity
Data Source
AI summary
The invention relates to a device for filtering of oil circulating in an internal combustion engine, comprising an oil filter adapter for detachable fastening of an exchangeable oil filter to the engine block of the internal combustion engine. The invention is characterized in that the oil filter adapter has a receptacle with an inserted pin, the receptacle having an outflow for returning the oil flowing from the exchangeable oil filter, the receptacle having a channel which leads in particular to an oil pump, and the receptacle having a drain which leads in particular to the cylinder crankcase, the pin being inserted elastically pretensioned such that during operation the pin clears the outflow and closes the channel and the drain, and, when the exchangeable oil filter is loosened from the oil filter adapter, the pin is displaced by spring force and clears the outflow, the channel, and the drain. Furthermore the invention includes a pin which is designed for use in the device according to the invention.