Internal combustion engine with cylinder cut-off and exhaust catalysts

摘要

The exhaust system is laid out so that the gases expelled by the cylinder group (1a) now off-power are heated up by these from the group (1b) being fired. Thus the fired cylinder gases are fed to the off-power cylinder group catalytic converter (3a) as composed of two solids (4,5) arranged in series, introducing the exhaust from the fired group (1b) downstream of the first solid (4). The converter for the off-power group (1a) is connected to the fired group converter for heat transfer. Preferably the hollow converter (3a) encloses the second converter (3b) and the exhaust lines (2a,b) from the respective cylinder groups join downstream of the two converters to a shared exhaust pipe. Thus the branch line (7) between the two solids issues downstream of the first solid so this is cooled even when the first cylinder group is off as against the second solid so as to produce the converting action when the group (1a) is fired the next time.