Annular Clip Damper for Simple Housing Mounting
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Solution Overview
Problem
The existing damper devices for high-pressure fuel pumps require inconvenient mounting processes due to the need for upper and lower holding members to be fitted to the pump housing, making installation cumbersome.
Innovation Solution
A damper device with a gas-filled damper body and an annular clip that applies a biasing force to the device unit's inner wall, allowing for simple and stable mounting within a housing space, featuring a stay member and an unevenly shaped annular clip for secure engagement and pulsation reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If upper and lower holding members are mounted on the outer peripheral edge portion of the diaphragm damper and fitted to the recessed portion formed in the pump housing, then the diaphragm damper can be stably held in the fuel chamber, but the mounting work becomes inconvenient and complex
Solution Approach 1:
The holding function is segmented from the damper body and transferred to a separate annular clip component. This clip can be independently installed on the pump housing and then the damper body is simply placed onto it, dividing the complex mounting process into simpler sequential steps.
Solution Approach 2:
The annular clip acts as an intermediary component between the pump housing and the damper body. It provides the holding function without requiring direct fitting between the damper and housing, simplifying the mounting process while maintaining stability.
2Reliability
If multiple holding members are used to secure the damper device, then the damper device is securely held in the housing space, but the device complexity increases
Solution Approach 1:
Multiple holding members are merged into a single annular clip component that encircles the damper body. This single component performs the function of multiple discrete holding members, reducing overall device complexity while maintaining securing reliability.
Solution Approach 2:
The annular clip serves multiple functions simultaneously: it acts as a holding member, provides structural support, and enables easy installation. This multi-functionality reduces the need for separate components for each function.
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 easy and secure installation of the damper device in the housing space with reduced complexity, ensuring effective pulsation absorption and structural integrity.
Implementation Method 1
a damper body (2) that is filled with gas and includes a diaphragm (4) with a deformable-action portion (19) formed at a central portion
Implementation Method 2
the deformable-action portion (19) is elastically deformed by fuel pressure accompanied by pulsation, the volume of the fuel chamber can be changed
Implementation Method 3
an annular clip (8) that holds an outer peripheral edge portion of the damper body (2) and causes a biasing force to act on an inner wall of the device unit
Data Source
AI summary
There is provided a damper device that can be held in a housing space with simple work. A damper device, which is disposed and used in a housing space formed in a device unit, includes: a damper body that is filled with gas and includes a diaphragm provided with a deformable-action portion formed at a central portion thereof; and an annular clip that holds an outer peripheral edge portion of the damper body and causes a biasing force to act on an inner wall of a cover member, which forms the housing space, in a radial direction.