Wastegate Valve Damping Element for Turbocharger Vibration Control
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Solution Overview
Problem
Wastegate valve devices for exhaust gas turbochargers experience vibrations and noise when the valve disk is opened, leading to potential damage and wear, particularly at partial engine loads, due to operational vibrations.
Innovation Solution
Incorporating a damping element within the drive train to dampen vibrations between the valve disk and actuator device, which can be designed as a separate component or an integral part of the drive train, effectively reducing wear and noise by utilizing materials like plastics and metal fleeces, and strategically positioning the damping element in the outer section to avoid aggressive thermodynamic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve disk is opened at partial load using electrically operated actuator devices, then the valve can be precisely controlled, but operational vibrations occur leading to damage and wear
Solution Approach 1:
A damping element is introduced as an intermediary component between the valve disk and the actuator device. This damping element absorbs and dissipates vibrational energy, preventing the transmission of harmful vibrations to the drive train components while maintaining the precise control capability of the electrically operated actuator device.
Solution Approach 2:
The damping element is pre-installed in the drive train to provide cushioning before vibrations can cause damage. By positioning the damping element in advance within the connection path between the valve disk and actuator, the system is prepared to absorb vibrational shocks before they reach critical components, thereby preventing wear and damage.
2Reliability
If the damping element is placed in the inner section exposed to exhaust gas, then it can dampen vibrations effectively, but the damping element degrades faster due to aggressive thermodynamic conditions
Solution Approach 1:
The damping element is extracted from the harsh exhaust gas environment and repositioned in the outer section of the drive train, where it remains effective at dampening vibrations but is not exposed to aggressive thermodynamic conditions. This spatial separation allows the damping element to maintain its functionality while extending its service life by avoiding degradation from heat and corrosive gases.
3Temperature
If expensive heat-resistant materials are used for the damping element, then it can withstand high temperatures, but the cost of the device increases
Solution Approach 1:
The damping element is extracted from the high-temperature exhaust gas environment and relocated to the outer section of the drive train. This repositioning eliminates the need for expensive heat-resistant materials, as the damping element now operates in a cooler environment where standard materials are sufficient, thereby reducing manufacturing costs while maintaining vibration damping effectiveness.
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 damping element significantly reduces vibrations and noise, extends the service life of the wastegate valve device, and allows for the use of less expensive materials, thereby minimizing wear and operational issues.
Implementation Method 1
at least one damping element (15) is provided between the valve disk (3) and the actuator device (6), wherein the at least one damping element (15) serves to dampen the vibrations occurring between the valve disk (3) and the actuator device (6)
Data Source
Figure 1~2
Figure 3~5
Figure 6~9
AI summary
The invention relates to a wastegate valve device (2) for a supercharging device (1), in particular for an exhaust-gas turbocharger (1), wherein a valve disc (3) is connected via a drivetrain (5) to an actuator device (6). Reduced wear of the wastegate valve device (2) and reduced noise generation by the wastegate valve device (2) are attained if at least one damping element (15) is provided between the valve disc (3) and the actuator device (6).