Method of making an exhaust gas collector
AssigneeBenteler Automobiltechnik GmbH
InventorsChristian Smatloch, Artur Lesch, Ingo Toparkus, Gerhard Steinbach, Jürgen Kleinschmidt
Life of this patent
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Abstract
In a method of making an exhaust gas collector, a collector housing is made from a tubular blank, and subsequently, an inlet duct is formed through a widening process to provide a substantially rectangular cross section with rounded narrow sides. The inlet duct is provided with a head flange. At the outlet side, the collector housing is necked by a press-forming process so as to shape an outlet duct having a substantially circular cross section which is reduced in size compared to the cross section of the collector housing. Attached to the outlet duct is an end flange.
Claims10
A method of making an exhaust gas collector for multi-cylinder internal combustion engines, comprising the steps of:
- providing a tubular blank having a cross sectional configuaration which corresponds to a final configuration of a collector housing to be made for an exhaust gas collector;
- forming the blank into the collector housing by shaping one end of the blank into an inlet duct of substantially rectangular cross section with rounded narrow sides;
- attaching a head flange to the inlet duct;
- fitting a catalytic converter inside the collector housing;
- and
- press-forming another opposite end of the collector housing to provide an outlet duct through contraction, so that the outlet duct has a cross section which is substantially round and reduced in size with respect to a cross section of the collector housing.
A method of making an exhaust gas collector for multi-cylinder internal combustion engines, comprising the steps of:
- shaping a tubular blank to a cross sectional configuration which corresponds to a final by an internal high pressure forming process configuaration of a collector housing;
- forming the blank into the collector housing with an inlet duct of substantially rectangular cross section with rounded narrow sides;
- attaching head flange to the inlet duct;
- fitting a catalytic converter inside the collector housing;
- and
- press-forming the collector housing to provide an outlet duct through contraction, so that the outlet duct has a cross section which is substantially round and reduced in size with respect to a cross section of the collector housing.
Dependencies are inferred from the claim text.