INTERNAL COMBUSTION ENGINE WITH DEACTIVATABLE CYLINDER, AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE

摘要

A method and system is provided for a turbocharged multi-cylinder internal combustion engine comprising a two-channel turbine and at least two groups of cylinders, wherein one group of cylinders is switchable responsive to an engine load over a threshold. Exhaust lines of each group of cylinders are arranged in a targeted manner to couple with the turbine such that the switchable group is attached to one channel and the active group is attached to the other channel to reduce the difference in distances that pressure pulses travel, wherein a shut-off element is provided in the channel attached to the switchable group and may be moved to block exhaust flow through the channel when the cylinders are deactivated, thus improving the partial deactivation and turbocharging characteristics of the engine.

主权项

1. A supercharged, applied-ignition internal combustion engine comprising:
at least two cylinders, in which each cylinder has at least one outlet opening adjoining an exhaust line for discharging the exhaust gases via an exhaust-gas discharge system; each cylinder has at least one inlet opening adjoining an intake line for the supply of charge air via an intake system; at least two cylinders are configured in such a way that they form at least two groups with in each case at least one cylinder, wherein the at least one cylinder of a first group is a cylinder which is in operation even in the event of a partial deactivation of the internal combustion engine, and the at least one cylinder of a second group is formed as a cylinder which can be switched in a load-dependent manner; at least one exhaust-gas turbocharger is provided which comprises a turbine arranged in the exhaust-gas discharge system and a compressor arranged in the intake system; wherein the exhaust lines of the cylinders of each cylinder group merge in each case to form an overall exhaust line such that an exhaust manifold is formed; and the two overall exhaust lines are connected to a two-channel turbine, which comprises at least one rotor mounted on a rotatable shaft in a turbine housing, in such a way that in each case one overall exhaust line is connected to one of the two inlet openings of the turbine, wherein each inlet opening is adjoined by one channel of the turbine, and a first shut-off element is provided which, in a first working position, blocks the second channel assigned to the second cylinder group and separates said second channel from the at least one rotor, and in a second working position, opens up said second channel and connects said second channel to the at least one rotor.