Common rail for diesel engines
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United States of America Patent
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app pub date -
Jul 18, 2006
filing date -
Sep 2, 2002
priority date (Note) -
Abandoned
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Abstract
A common rail for a diesel engine has a main pipe rail with an axial flow passage. Branch holes are made in the main pipe rail and communicate with the axial flow passage. The main pipe rail is worked to decrease stress concentration near the branch holes. The whole inner peripheral surface of the main pipe rail and the branch holes then is subjected to autofrettage processing to generate a compressive residual stress on the entire inner peripheral surface of the main pipe rail and the branch holes for increasing fatigue strength.
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