Abstract
Recently, European car companies change passenger car engines from gasoline ones to diesel ones due to low CO_2 emission. However high power engines need in Europe, so small-sized high speed turbo-charged DI diesel engines were developed. In this engine since the combustion pressure increases over 15MPa, the reliability and durability are most important factor in mass-production. In this study, we investigated the stress characteristics on cylinder head and on the exhaust manifold. Moreover we examined the relations between the strain and engine acceleration. As a result, it was found that there is the influence of engine vibration for the strain change at high speed and high load.
