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Development of Variable Geometry Turbocharger for Diesel Passenger Car
Published November 03, 1998 by Institution of Mechanical Engineers in United Kingdom
The emission regulation becomes harder, because of high concern for the environmental problem, and the improvement for the engine is rapidly proceeding. Especially for the diesel engine, turbocharger is required to give higher boost and faster transient response to reduce smoke level at low engine speed. On the other hand, lower back pressure and optimized boost pressure are needed to get lower fuel consumption and high output.
MHI has been developing Variable Geometry Turbocharger (here in after VG turbocharger) to cover these complex requirements. The target is to develop a mass-productive reasonable cost VG turbocharger which has sufficient durability and high performance. Basic development of the structure and mechanism have been successfully carried out and practical application tests are being performed in the field of vehicle application.
This report mainly describes the development status of VG turbocharger for diesel passenger car application.