Wastegate with reduced leakage current
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United States of America Patent
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Oct 3, 2023
Grant Date -
Jul 21, 2022
app pub date -
May 28, 2020
filing date -
May 31, 2019
priority date (Note) -
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Abstract
Valves for gas engines are disclosed, in particular for wastegates arranged upstream of a turbocharger. Accordingly, a valve for a gas engine, comprises a metal housing having an opening for providing a fluid flow out of the valve, and a metal valve member configured for adjustably restricting the fluid flow through the opening, wherein the housing is made of a first material comprising a steel and wherein the valve member is made of a second material having a thermal expansion coefficient being lower than the first material. By providing the valve member and the valve housing with materials with different thermal expansion coefficients, the expansion of the valve member may be reduced during a rapid temperature increase or heating up of the valve member e.g. when the gas engine is started or accelerated.
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