Damper Device Pulsation Reduction via Segmented Biasing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing damper devices for high-pressure fuel pumps require a complex installation process due to the need to attach upper and lower sandwiching portions to the outer peripheral edge of the diaphragm damper and fit them into recessed portions of the pump housing.
Innovation Solution
A damper device configuration featuring a pair of damper bodies with plates and diaphragms sealed with gas, biasing means such as a wave spring, stay members, and a frame member with stopper portions to restrict movement, allowing for simple installation by fixing the cover member to the device main body, which integrates the damper bodies with a biasing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If upper and lower sandwiching portions are attached to the outer peripheral edge portion of the diaphragm damper and fitted in recessed portions of the pump housing, then the diaphragm damper can be installed in an unmovable state in the fuel chamber, but the installation process becomes complicated
Solution Approach 1:
The damper device is divided into separate components: a holder that attaches to the pump housing, and a diaphragm damper body that can be independently assembled. The holder includes recessed portions that receive the outer peripheral edge portion of the diaphragm damper, allowing for simplified assembly where components are segmented and then joined rather than requiring complex integrated attachment structures.
Solution Approach 2:
The outer peripheral edge portion of the diaphragm damper is fitted into recessed portions of the holder, creating a nested structure where one component is inserted into another. This nesting approach simplifies the attachment process by eliminating the need for separate sandwiching portions and complex fastening mechanisms, while still achieving reliable fixation.
2Reliability
If a complex attachment structure with sandwiching portions is used, then the damper device can be securely fixed, but the number of parts and assembly steps increases
Solution Approach 1:
The holder integrates multiple functions into a single component: it provides structural support, contains recessed portions for receiving the diaphragm damper's outer peripheral edge, and serves as the mounting interface with the pump housing. This merging of functions reduces the total number of parts needed compared to using separate sandwiching portions and attachment structures.
Solution Approach 2:
The holder is designed as a multi-functional component that simultaneously secures the diaphragm damper, provides structural support, and interfaces with the pump housing. This universal design approach allows a single component to perform multiple roles, simplifying both manufacturing and assembly processes while maintaining secure fixation.
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
Enables a straightforward installation process while maintaining effective pulsation reduction performance by uniformly biasing and stabilizing the damper bodies within the fuel chamber, ensuring reduced vibration and improved stiffness.
Implementation Method 1
a pair of damper bodies 2, 2' each having a plate 5 and a diaphragm 4 and having an enclosed space sealed with gas
Implementation Method 2
biasing means provided between the pair of damper bodies arranged such that the plates face each other and configured to bias the damper bodies from one side of the device main body and the cover member to other side of the device body and the cover member
Implementation Method 3
The biasing means may be a wave spring arranged between outer peripheral edge portions of the damper bodies
Data Source
AI summary
A damper device arranged in a housing space formed between a device main body and a cover member includes a pair of damper bodies each having a plate and a diaphragm and having an enclosed space sealed with gas. A biasing device is provided between the pair of damper bodies arranged facing each other and configured to bias the damper bodies from one side of the device main body and the cover member to the other side of the device main body and the cover member, stay members each extending from an outer peripheral edge portion of each of the damper bodies and brought into contact with other side, and a frame member arranged on one side of the device main body and the cover member and having a stopper portion configured to restrict movement of the damper bodies in the direction of the other side.