Fuel Injection Valve Bracing Element for Stroke Stability
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Solution Overview
Problem
Existing fuel injection valves experience a change in the maximum stroke of the magnet armature due to deformation caused by high fuel pressures, affecting the dynamics and control capability of the injection process.
Innovation Solution
A fuel injection valve design that incorporates a bracing element between the magnet armature and the valve piece, which maintains a constant spacing between the electromagnet and the valve piece, ensuring the maximum stroke of the magnet armature remains unchanged despite deformation, achieved through a preloaded bracing element and a magnet spring for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve piece is subjected to high fuel pressure in the control chamber, then the hydraulic force opens the outflow opening, but the valve piece deforms and shortens the maximum stroke of the magnet armature
Solution Approach 1:
A bracing element is introduced as an intermediary component between the electromagnet and the valve piece. This bracing element absorbs the deformation caused by hydraulic pressure, preventing it from affecting the spacing between the electromagnet and valve piece. The bracing element acts as a mechanical mediator that isolates the critical magnetic gap from pressure-induced deformations.
Solution Approach 2:
The bracing element is preloaded against the valve piece to counteract the deformation caused by hydraulic pressure before the pressure acts on the valve piece. This preliminary anti-action ensures that the valve piece maintains its original position and the magnet armature stroke remains constant despite the applied pressure.
2Speed
If the spacing between electromagnet and valve piece is reduced to increase magnetic force, then the opening dynamics improve, but the maximum stroke of magnet armature is shortened
Solution Approach 1:
The bracing element serves as a stable reference structure that allows precise positioning of the electromagnet relative to the valve piece. By providing a rigid mounting surface that is isolated from pressure deformations, the bracing element enables the electromagnet to be positioned at the optimal distance for maximum magnetic force while maintaining the full available stroke of the magnet armature.
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
This design maintains consistent injection characteristics and dynamics by preventing deformation-induced changes in the valve piece's position, allowing for reliable operation even under high injection pressures.
Implementation Method 1
the magnet armature can be moved away from the valve seat by an electromagnet
Implementation Method 2
the pressure in the control chamber exerts a hydraulic force on the valve piece in the region of the outflow opening in the direction of the magnet armature
Implementation Method 3
there is arranged a bracing element which is preloaded against the valve piece and which exerts a force on the valve piece in the region of the outflow opening in the direction of the control chamber
Data Source
AI summary
Fuel injection valve having a magnet armature (18) which interacts with a valve seat (19), which is formed on a valve piece (15), in order to open and close an outflow opening (20), wherein the magnet armature (18) can be moved away from the valve seat (19) by an electromagnet (24). A valve piece (15) delimits a control chamber (12), wherein the outflow opening (20) opens into the control chamber (12), and the control chamber (12) can be charged with fuel at high pressure that exerts a hydraulic force on the valve piece (15). Between the magnet armature (18) and the valve piece (15), there is arranged a bracing element (30) which is preloaded against the valve piece (15) and which exerts a force on the valve piece (15) in the region of the outflow opening (20) in the direction of the control chamber (12).