Exhaust system of an internal combustion engine
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United States of America Patent
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-
May 6, 2003
Grant Date -
Aug 1, 2002
app pub date -
Jan 29, 2002
filing date -
Jan 31, 2001
priority date (Note) -
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status (Latency Note)
Importance
Abstract
In an exhaust system for an internal combustion engine having two groups of cylinders with a separate exhaust line for each cylinder group, each including an upstream catalytic converter and a downstream catalytic converter and a control valve, a first transverse connection extending between the exhaust lines upstream of the upstream catalytic converters and a second transverse connection extending between the exhaust lines between the upstream and downstream catalytic converters, the valves are so arranged and controlled that, during warm-up, the exhaust gases from both cylinder groups flow through the upstream catalytic converter of one, and the downstream catalytic converter of the other exhaust line for rapid heat up of one of the catalytic converters in each of the exhaust lines.
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