Supercharged internal combustion engine with two-channel turbine and method for operating an internal combustion engine of said type
AssigneeFord Global Technologies, LLC
InventorsHelmut Matthias Kindl, Norbert Andreas Schorn, Vanco Smiljanovski, Rob Stalman, Franz Arnd Sommerhoff
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Abstract
A supercharged internal combustion engine comprising a two channel turbine fluidly connects the two channels within the turbine housing by virtue of at least one opening in the housing wall which separates the two channels wherein at least one displaceable wall part is provided which serves for opening up the opening in the housing wall to optimize the performance of the turbine responsive to the exhaust gas flow rate.
Claims19
A supercharged internal combustion engine comprising at least one cylinder head with at least two cylinders, in which each cylinder has at least one outlet opening for discharging the exhaust gases out of the cylinder, and each outlet opening is adjoined by an exhaust line;
- at least two cylinders are configured in such a way as to form two groups with in each case at least one cylinder;
- 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;
- the two overall exhaust lines are connected to a two-channel turbine, which comprises a rotor which is mounted on a rotatable shaft in a turbine housing, such 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 the two channels are separated from one another as far as the rotor by means of a housing wall, such that the exhaust-gas streams of the two channels are conducted separate from one another to the rotor;
- wherein
- the two channels of the turbine can be connected to one another within the turbine housing by virtue of at least one opening in the housing wall upstream of the rotor and downstream of the inlet openings being opened up.
A method for an engine comprising:
- adjusting a displaceable wall part which opens or closes an opening in a housing wall of a turbine housing upstream of a rotor and downstream of inlet openings to fluidly connect two channels of the turbine housing via the opening responsive to exhaust gas flow rate over a threshold.
The method as claimed in claim 14 wherein the displaceable wall part is adjusted to an opened position which opens the opening in the housing wall when the exhaust gas flow rate is above a first threshold.
The method as claimed in claim 14 wherein the displaceable wall part is adjusted to a closed position which closes the opening in the housing wall when the exhaust rate is below a second threshold.
A method for an engine comprising:
- switching a displaceable turbocharger housing wall part to cover an opening in a housing wall when an exhaust gas flow rate is below a second threshold;
- and
- switching the displaceable wall part to uncover the opening in the housing wall when the exhaust gas flow rate is above a first threshold.
Dependencies are inferred from the claim text.