Fuel injector having residually stressed solenoid housing for improved pressure capapility
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United States of America Patent
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Aug 31, 2021
Grant Date -
Jun 4, 2020
app pub date -
Dec 4, 2018
filing date -
Dec 4, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A fuel injector includes an injector body, and a stack within the injector body, and having a nozzle supply passage therein. The stack includes a solenoid assembly having a solenoid housing piece with a fuel bore formed therein that includes a segment of the nozzle supply passage. The solenoid housing piece includes a solenoid housing material in a base state, and a solenoid housing material in a residual compressive stressed state, with the fuel bore being formed by the solenoid housing material in the residual compressive stressed state. Residual stresses may be imparted by ballizing, nitriding, carburizing, autofrettage, or still another technique.
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