Camshaft Phaser Magnetic Trap for Particulate Contamination
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Solution Overview
Problem
Contaminated oil in camshaft phasers, containing magnetic and non-magnetic particulate, degrades the phasing function by interfering with the operation of the check valve plate, leading to improper engine timing operations.
Innovation Solution
A magnetic trap is integrated within the camshaft phaser, featuring a magnet that generates magnetic field lines to attract and capture magnetic particulate, preventing them from interfering with the phaser's operation, while non-magnetic particulate is blocked by a retaining pin configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluid flows through the camshaft phaser to establish rotational position, then the phasing function is achieved, but magnetic and non-magnetic particulate contaminate the fluid and degrade operation
Solution Approach 1:
The patent extracts harmful magnetic particulate from the fluid circuit by introducing a magnet that captures and removes these contaminants from the circulating oil, preventing them from interfering with check valve plate operation and maintaining reliable phaser function
Solution Approach 2:
The patent introduces a magnet as an intermediary element within the fluid circuit that mediates between the harmful magnetic particulate and the phaser components, capturing the particulate before it can interfere with normal operation
2Object-affected harmful factors
If a magnet is added to capture magnetic particulate, then magnetic contamination is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the magnetic trap function with the existing phaser structure by integrating the magnet into the fluid circuit pathway, combining contamination removal with the phaser's operational components rather than adding a separate standalone system
Solution Approach 2:
The magnet serves multiple functions: it captures magnetic particulate from the fluid, prevents interference with the check valve plate, and maintains fluid circulation, making a single element perform multiple protective and operational roles
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 magnetic trap effectively removes magnetic particulate from the fluid circuit, preventing contamination and ensuring proper phaser operation, while the retaining pin configuration manages non-magnetic particulate, maintaining the phaser's functionality and engine timing accuracy.
Implementation Method 1
a magnet that generates magnetic field lines to attract and capture magnetic particulate
Data Source
AI summary
A camshaft phaser, including: an axis of rotation; a stator with a radially outer surface including a plurality of teeth; a rotor located radially inwardly of the stator; a chamber bounded at least in part by the stator and the rotor; a locking cover; a spring cover non-rotatably connected to the locking cover; a space enclosed, at least in part, by the spring cover and the locking cover; a plurality of fasteners non-rotatably connecting the stator and the locking cover; a spiral spring located in the space and including a first end fixed to the stator; and a magnetic trap located within the space and including a magnet.