Electromagnetic Valve Hook Retention for Transport
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Solution Overview
Problem
Electromagnetic valves for internal combustion engines face challenges during transport and assembly, as the armature/control element unit may drop out, potentially damaging seals and requiring additional components for protection.
Innovation Solution
Incorporating a hook arrangement on the housing that engages with a radial recess in the movable unit to prevent axial movement and secure the armature/control element unit, eliminating additional component needs and ensuring seal protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control element is passed onto the valve seat through the opening in the bypass line, then the valve can be assembled, but the armature and control element unit may drop out during transport and assembly making assembly and transport significantly more difficult
Solution Approach 1:
The solution segments the retention function from the seal function. The housing is divided into a first housing part and a second housing part, with the seal arranged between them. The armature and control element form a separate movable unit that is retained by the housing structure itself rather than relying solely on the seal, thus preventing dropout during transport while maintaining sealing function.
Solution Approach 2:
The seal acts as an intermediary element between the first and second housing parts. It provides both sealing function and retention function by being compressed between the housing parts, preventing the movable unit from dropping out while maintaining the seal between housing sections.
2Reliability
If an additional protective cap is slipped over the control element, then the components are protected during transport, but additional components must be removed prior to assembly and correct positioning must still be ensured
Solution Approach 1:
The retention function is merged into the housing structure itself through the hook arrangement formed by the first and second housing parts. This eliminates the need for separate protective caps or additional retention components, as the housing structure directly prevents the movable unit from dropping out during transport and assembly.
Solution Approach 2:
The housing structure provides its own retention function through the hook arrangement, eliminating the need for external protective components. The system serves itself by using its own structural elements to prevent dropout, rather than requiring additional protective caps or retention devices.
3Reliability
If an outward directed seal rests on a housing part to prevent the control element from sliding out, then the control element is retained, but the seal is subjected to mechanical stress which may result in damage and leakages
Solution Approach 1:
The housing is segmented into first and second housing parts with the seal arranged between them. The hook arrangement is formed by these separated parts, which allows the seal to be compressed between the parts rather than bearing the full retention load. This segmentation distributes the mechanical stress and prevents excessive loading of the seal.
Solution Approach 2:
The retention mechanism is moved from a radial direction (seal pressing against the control element) to an axial direction (hook arrangement formed by housing parts). This dimensional change allows the seal to maintain its sealing function without bearing the full retention load, as the hook arrangement prevents dropout in the axial direction while the seal handles only sealing requirements.
Data Source
AI summary
An electromagnetic valve for an internal combustion engine includes a housing, an electromagnetic actuator arranged in the housing, the electromagnetic actuator having an electromagnetic armature and a core, a control element which is arranged to protrude axially out of the housing and which is connected to the electromagnetic armature so as to form a movable unit together therewith, the movable unit having a radial recess, and an arrangement which delimits an axial movement of the movable unit away from the core of the electromagnetic actuator. The arrangement includes at least one hook arranged on the housing. The at least one hook engages into the radial recess of the movable unit.