Pump Pressure Control Valve Shock Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern gasoline direct injection pumps experience audible noise due to internal part interactions, necessitating improved noise reduction methods in pressure control valve systems.
Innovation Solution
The design incorporates a pump with a movable needle and valve carriage, featuring an internal stop and cavity, along with a sleeve opening and fluid passageway, allowing the needle to impact the valve and valve carriage sequentially, and a suction stroke mechanism that advances the valve into the cavity, reducing noise through a shock-absorbing damper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the pressure control valve uses direct contact between internal parts for control, then the valve response speed and control precision are improved, but audible noise increases due to impact forces
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damper that contacts the valve carriage before impact occurs. The damper absorbs impact forces when the needle contacts the valve carriage, preventing direct transmission of shock forces that cause audible noise while maintaining the rapid response capability of the direct contact control mechanism
Solution Approach 2:
The patent uses an intermediary approach by introducing a damper as a mediator between the needle and the valve carriage. This damper acts as a shock-absorbing intermediate element that allows control function to be maintained while reducing the harmful impact forces that generate audible noise
2Device complexity
If the valve carriage uses a simple structure without internal stop, then the device complexity is reduced, but shock forces during operation increase causing more noise
Solution Approach 1:
The patent applies segmentation by dividing the valve carriage into functional segments: the main valve carriage body and an internal stop component. This segmentation allows the internal stop to be positioned within the cavity to provide shock absorption during valve operation, reducing noise without significantly increasing overall structural complexity
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
This configuration effectively minimizes noise levels by distributing the impact forces across multiple contacts, resulting in a quieter operation of the pump, applicable across various engine RPMs.
Implementation Method 1
the valve is operable to be impacted by the needle during the stroke. Also, the needle is operable to impact the valve carriage during the stroke
Implementation Method 2
The pump also includes a shock-absorbing damper, and the shock-absorbing damper is operable to reduce shock forces created when the needle impacts the valve carriage
Data Source
AI summary
A pump includes a pump casing defining a first chamber and a second chamber, and fluid moves from the first chamber to the second chamber during a stroke. The pump also includes a needle that is movably disposed in the first chamber and a valve carriage that is movably disposed in the second chamber. The valve carriage includes an internal stop, and the valve carriage also includes a cavity therein that is partially defined by the internal stop. The pump further includes a valve that is movably disposed within the cavity of the valve carriage, and the valve is operable to be impacted by the needle during the stroke. Also, the needle is operable to impact the valve carriage during the stroke. Moreover, the valve is operable to impact the internal stop during the stroke at a time different from the needle impacting the valve carriage.