Exhaust gas system for internal combustion engines

Patent · Tue Sep 08 00:00:00 EDT 1981

OSTI ID:5895324

Jans, K; Ohlendorf, R; Schuster, H

An exhaust gas system is disclosed for a multi-cylinder internal combustion engine, in which some cylinders are adapted to be effectively disconnected; the exhaust gas system includes in a common exhaust line, an O/sub 2/-probe and two series-connected catalysts while a separate exhaust gas line is coordinated to the cylinders adapted to be effectively disconnected; a control member operable as a function of load opens three separate branch connections from the separate exhaust line to the common exhaust line in such a manner that when all cylinders are firing, the branch connection terminating upstream of the O/sub 2/-probe is opened; the branch terminating in the common exhaust line between the O/sub 2/-probe and the first of the series-connected catalysts is opened when at least one of the cylinders is effectively disconnected and when the internal combustion engine is still relatively cold or warms up to a middle temperature; at temperatures exceeding the middle operating temperature, the branch connection terminating between the two catalysts is opened.

• Assignee: Daimler-Benz Ag (Germany, Federal Republic Of)
• Patent Number(s): US 4287716
• OSTI ID: 5895324
• Resource Relation: Patent Priority Date: Priority date 30 Mar 1979, German, Federal Republic of (F.R. Germany)
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST SYSTEMS
DESIGN
INTERNAL COMBUSTION ENGINES
AIR POLLUTION CONTROL
CATALYSTS
CONTROL SYSTEMS
EXHAUST GASES
FUEL ECONOMY
FUEL-AIR RATIO
OXYGEN METERS
CONTROL
ENGINES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
MEASURING INSTRUMENTS
METERS
POLLUTION CONTROL
WASTES
330100* - Internal Combustion Engines