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Award winner |
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| Grommet Gasket for Innovative Diesel Engine |
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| Applicant: NIPPON GASKET CO., LTD. |
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Reason for selection:
To develop a diesel engine with superb fuel efficiency and environment-friendliness
is a must to enhance international competitiveness of the Japanese automotive
industry. A new type of diesel engine designed for an innovative
car for global strategy puts higher loads on the gasket than conventional
engines, demanding better sealing performance and reliability. With a new
gasket structure devised, required sealing performance was attained but
as higher loads were placed on the grommet plate, annealed stainless steel
sheets of such conventional grades as SUS304 and SUS403 were cracked. Also,
cold rolled stainless steel products with higher strength lacked plasticity
and were found unfit for gasket manufacture. Thus, materials with both
strength and plasticity were sought. The grades newly developed this time
are annealed and as such have elongation of 40% and are fit for processing.
In addition, with crystalized grain miniaturized, they have the enduring
force of more than 600MPa and besides, surface damage in the bending process
is reduced and wear resistance is excellent as well. A series of new developments
achieved this time have dramatically improved the function of stainless
steel gasket, which in turn has helped launch an innovative diesel engine. |
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Stainless steel type used: SUS301L Equivalent, SUS301, etc.
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Consumption: 0.2kg /piece
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| Presenter: NIPPON STEEL & SUMUTOMO METAL CORPORATION. |
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