Pulsation Damper with Movable Element for Engine Oil Pressure Loss Reduction
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Solution Overview
Problem
Existing pulsation dampers for fluid pressure pulsations in engine oil circuits of internal combustion engines often cause pressure losses due to cross-sectional jumps, which can damage components and are not effectively addressed by existing technologies.
Innovation Solution
A pulsation damper with a housing containing a movable damping element that converts hydraulic energy into kinetic energy, allowing for axial displacement in response to pressure pulsations, maintaining a constant flow channel cross-section to prevent pressure losses and effectively dampen pressure peaks without electrical energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cross-sectional jump is introduced in the fluid-carrying line (as in interference dampers with series resonators), then pressure pulsations are reflected and attenuation is achieved, but pressure loss occurs
Solution Approach 1:
The patent applies a movable damping element that can dynamically adjust its position in response to pressure pulsations. The damping element is displaced axially by pressure differences, creating a dynamic flow path that converts hydraulic energy into kinetic energy without requiring a fixed cross-sectional jump, thus avoiding permanent pressure losses
Solution Approach 2:
The patent changes the flow path parameters dynamically through the displacement of the damping element. The gap between the damping element and housing varies with pressure pulsations, creating a time-varying flow resistance that attenuates pressure peaks without the need for a permanent geometric discontinuity that would cause pressure loss
2Reliability
If a pulsation damper is designed to effectively dampen pressure peaks, then downstream components are protected, but the device complexity increases
Solution Approach 1:
The damping element operates autonomously, being displaced purely mechanically by pressure pulsations without requiring external electrical energy or control systems. The element automatically responds to pressure changes, converting hydraulic energy into kinetic energy for damping, thereby achieving reliable component protection with minimal structural complexity
Solution Approach 2:
The patent utilizes hydraulic principles by allowing pressure pulsations to directly drive the mechanical displacement of the damping element. The fluid pressure itself provides the actuating force, eliminating the need for external power sources or complex control mechanisms while effectively protecting downstream components
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 pulsation damper reliably reduces pressure pulsations by converting hydraulic energy into kinetic energy, ensuring a constant volume flow and minimizing pressure losses, thus protecting downstream components without the need for electrical energy.
Implementation Method 1
the damping element can be displaced purely mechanically by the pressure pulsations. By moving the damping element, mechanical work is performed and hydraulic energy is converted into kinetic energy
Implementation Method 2
A pulsation damper with a housing containing a movable damping element that converts hydraulic energy into kinetic energy, allowing for axial displacement in response to pressure pulsations
Data Source
Figure 1a~1b
Figure 2~3a
Figure 3b
AI summary
The pulsation damper (1) has damper main portion which is formed with an axial flow channel (3) as an intermediate portion in which fluid line is inserted. The damper main portion is comprised with the housing (2). The housing is formed with a cavity (23) which is communicated with the axial flow channel. An attenuator (4) is arranged in the axial direction of the cavity in displaceable manner. The outside diameter of the attenuator is provided as equal to the inner diameter of the cavity. Independent claims are included for the following: (1) an oil module for insertion into oil circuit of internal combustion engine; and (2) the method for damping pressure pulsation of fluid in fluid line.