Turbocharger Variable Flow Valve Vibration Damping
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Solution Overview
Problem
Vibration caused by pulsation in exhaust gases leads to chattering sounds in waste gate valves and other variable flow valve mechanisms in turbochargers, reducing their quietness and potentially causing wear.
Innovation Solution
A variable flow valve mechanism with a biasing member, such as a disc spring, wave washer, or damping alloy, is used to counteract the vibrations of the link member and actuating rod, reducing their oscillation and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waste gate valve mechanism is used to control exhaust gas flow, then the turbocharging pressure can be regulated, but vibration and chattering sounds occur due to pulsation in exhaust gases
Solution Approach 1:
A damper is integrated into the link member to provide vibration damping before the pulsation reaches the actuating rod and valve mechanism. This beforehand cushioning absorbs the harmful vibrations and chattering sounds generated by exhaust gas pulsation, protecting the valve mechanism while maintaining pressure control reliability
Solution Approach 2:
The damper acts as an intermediary element between the link member and the actuating rod mechanism. It mediates the transmission of vibrations by absorbing and attenuating the pulsation energy, reducing the harmful effects on the valve while preserving the necessary mechanical coupling for control functionality
2Productivity
If the link member and actuating rod are directly connected, then the valve can be actuated efficiently, but vibration causes wear on the connection components
Solution Approach 1:
The damper provides beforehand cushioning at the connection point between the link member and actuating rod, absorbing vibrations before they cause wear to the pinned connection. This protects the mechanical interface while maintaining efficient force transmission for valve actuation
Solution Approach 2:
The link member is constructed as a composite structure combining a main body portion with a damping portion made of vibration-damping material. This composite design allows the structure to maintain mechanical strength for efficient actuation while simultaneously providing vibration absorption to reduce wear on connection 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 mechanism effectively suppresses vibrations and noise from the waste gate valve, enhancing its quietness and reducing wear on components.
Implementation Method 1
a biasing member configured to bias the distal end portion of the link member and the distal end portion of the actuating rod in directions opposite to each other
Data Source
AI summary
An actuating rod of an actuator is rotatably connected to a distal end portion of a link member, a connecting pin is integrally provided at a distal end portion of the actuator rod, a pin hole for allowing insertion of the connecting pin is penetrated and formed at a distal end portion of the link member, and a disc spring for biasing the distal end portion of the link member and the distal end portion of the actuating rod in an axial direction (both sides of the axial direction) of the actuating rod as directions opposite to each other between the distal end portion of the link member and the distal end portion of the actuator rod.