Solenoid Valve Armature Damping Element for NVH Noise Reduction
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Solution Overview
Problem
Solenoid valves in vehicle brake systems generate closing noise due to the interaction between a hardened closing body and valve seat, which affects the NVH behavior and prevents direct mounting of the hydraulic unit to the vehicle bulkhead.
Innovation Solution
Incorporating an elastic damping element between the closing body and the valve armature to dampen the impulse when the closing body hits the valve seat, which can be designed as an elastomer disc or a plastic injection molded part, such as PEEK, to reduce noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hardened closing body and valve seat are used to ensure sealing reliability, then the sealing performance is improved, but closing noise is generated due to the impact when the closing body hits the valve seat
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping element (elastic or viscoelastic material) between the closing body and the valve armature before the closing action occurs. This damping element absorbs the impact energy when the closing body strikes the valve seat, preventing the generation of closing noise while maintaining the sealing reliability provided by the hardened closing body and valve seat.
Solution Approach 2:
The patent uses an intermediary approach by inserting a damping element as a mediator between the closing body and the valve armature. This intermediary component absorbs the impact shock during valve closing, reducing the noise transmission to the valve body and surrounding structure, while allowing the hardened closing body to maintain its sealing function against the valve seat.
2Device complexity
If the hydraulic unit is mounted directly to the vehicle bulkhead to simplify the system design, then the device complexity is reduced, but closing noise from the solenoid valve disturbs the vehicle interior
Solution Approach 1:
The damping element is integrated into the valve armature structure beforehand, providing noise reduction capability that allows the hydraulic unit to be mounted directly to the vehicle bulkhead without causing interior noise disturbance. This eliminates the need for additional noise isolation measures or complex mounting arrangements.
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 solution effectively reduces or eliminates closing noise, improving the NVH behavior of the vehicle brake system and allowing for a one-box system design where the hydraulic unit can be mounted directly to the vehicle bulkhead without interior noise disturbance.
Implementation Method 1
an elastic damping element is arranged between the closing body and the recess, which dampens an impulse occurring when the closing body hits the valve seat
Implementation Method 2
the impulse when the closing body hits the valve seat can be damped, so that the structure-borne noise in the system can be advantageously reduced
Implementation Method 3
Energizing the magnet assembly generates a magnetic force, which moves the valve armature with the closing element from the open position to the closed position
Data Source
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AI summary
The invention relates to a valve armature (10) for a solenoid valve. One end of the valve armature (10) has a depression (12) that accommodates a closing element (14) which cooperates with a valve seat (6.1) and includes a closing member (14.1), as well as to a corresponding valve cartridge (1) for a solenoid valve comprising a valve armature (10) of said type. According to the invention, an elastic damping element (16) is placed between the closing member (14.1) and the depression (12), said damping element (16) damping a moment generated when the closing member (14.1) hits the valve seat (6.1).