Development of the Stainless Cast-Steel Exhaust Manifold

Toshiro Shimamoto; Kenichi Asano; Yoshiaki Shioya; Satoshi Ando

doi:10.4271/930621

1993-03-01

Development of the Stainless Cast-Steel Exhaust Manifold 930621

At Mitsubishi Motors, a thin-walled exhaust manifold, made of stainless cast-steel, has been developed with the aim of achieving higher heat-resisting reliability as well as weight reduction. The new exhaust manifold is made of ferritic stainless cast-steel, employing an advanced vacuum casting (CLAS). Its geometry was designed using finite element analysis and its durability was confirmed by testing both on various test devices and on a vehicle.

The exhaust manifolds has been adopted on a production engine model and has proven the following advantages over a conventional cast-iron ones;

excellent heat resistance. weight reduction of over 20%.
possible exhaust emission reduction as a result of lower heat-capacity of the exhaust manifold.

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Development of the Stainless Cast-Steel Exhaust Manifold 930621

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