Brake System Damper Member for Pressure Pulsation Reduction
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Solution Overview
Problem
Conventional brake systems experience significant pressure pulsation during operation, leading to operating noise and increased manufacturing costs when attempting to reduce pulsation through increased piston numbers or cross-sectional area adjustments.
Innovation Solution
A brake system incorporating a damper member with a cylinder, cap, and piston that reciprocates between step portions, supported by springs and shock absorption elements, is installed between the pump discharge outlet and orifice to attenuate pressure pulsation, ensuring balanced pressure transmission and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of pump pistons is increased to reduce pressure pulsation, then pressure pulsation is reduced, but the weight and volume of the module increase, leading to increased manufacturing costs
Solution Approach 1:
A damper member is introduced as an intermediary component between the pump discharge outlet and the orifice. The damper member includes a piston that reciprocates within a cylinder, supported by springs and shock absorption elements, to attenuate pressure pulsation without requiring multiple pump pistons, thus avoiding increased module weight and volume
Solution Approach 2:
The invention changes the approach from modifying the pump structure (increasing piston count) to adding a separate pressure regulation stage. The damper member adjusts pressure parameters through its piston-spring-shock absorption element mechanism, achieving pulsation reduction while maintaining the original pump configuration and module compactness
2Reliability
If the cross-sectional area of the flow channel is adjusted to reduce damping, then pressure pulsation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The pressure regulation function is segmented into a separate damper member component rather than modifying the existing flow channel geometry. This segmentation allows the main pump body to maintain its simple, easy-to-manufacture structure while the damper member handles the complex pressure pulsation attenuation function independently
Solution Approach 2:
The damper member serves as an intermediary device that handles the complex pressure regulation task without requiring modifications to the main pump structure or flow channels, thus preserving manufacturing simplicity while achieving pressure pulsation reduction
3Device complexity
If a simple orifice structure is used to reduce pressure pulsation, then device complexity is reduced, but pressure pulsation cannot be completely reduced
Solution Approach 1:
The invention merges multiple pressure regulation mechanisms within the damper member: a reciprocating piston, springs for cushioning, and shock absorption elements. This combination achieves complete pressure pulsation reduction while maintaining reasonable structural complexity, overcoming the limitations of a simple orifice
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 pressure pulsation and operating noise, enhancing the reliability and performance of the brake system by using a damper member to absorb shocks and regulate piston movement, thereby maintaining uniform oil pressure.
Implementation Method 1
a plurality of springs installed along an outer circumferential surface of the piston to support both sides of the piston
Implementation Method 2
a damper member arranged to communicate with a main flow channel between the discharge outlet of the pump and the orifice
Data Source
AI summary
Disclosed herein is a brake system capable of reducing periodic pressure pulsation generated by operation of a pump. The brake system includes a damper member provided with a cylinder having a step portion and a piston to reciprocate between the cylinder and the cap. The piston may be prevented from being excessively pushed toward one side of the damper member, and pressure pulsation generated by operation of the pump may be attenuated. Therefore, overall operating noise may be reduced during control the brake and product reliability may be increased.