Internal combustion engine and method of operating an internal combustion engine
OwnerTimo Janhuneninventor
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Abstract
According to an aspect of the present invention, there is provided a combustion engine comprising a first exhaust gas channel and a separate second exhaust gas channel each connected to at least one cylinder, wherein the first exhaust gas channel is further connected to a turbocharger and the second exhaust gas channel is configured to bypass the turbocharger, and a throttling valve in the second exhaust gas channel configured to control an exhaust gas pressure in the cylinder.
Claims11
combustion engine system comprising:
- a two-stroke engine of a Z-type;
- a compressor connected to a turbocharger turbine;
- a first intercooler arranged at a position upstream from the compressor;
- a second intercooler at a position downstream from the compressor;
- a controllable intercooler bypass configured to bypass the second intercooler;
- a first exhaust gas channel and a separate second exhaust gas channel, each connected to at least one cylinder of the two-stroke engine;
- wherein the first exhaust gas channel is to discharge exhaust gas from the at least one cylinder of the two-stroke engine to the turbocharger turbine;
- and
- wherein the separate second exhaust gas channel is to discharge the exhaust gas from the at least one cylinder of the two-stroke engine to bypass the turbocharger turbine;
- and
- a throttling valve positioned in the separate second exhaust gas channel;
- wherein the throttling valve is configured to control a pressure of the exhaust gas in the separate second exhaust gas channel based on an amount of the exhaust gas remaining in the at least one cylinder of the two-stroke engine.
A method of operating an internal combustion engine comprising a first exhaust gas channel connected to a turbocharger turbine, a separate second exhaust gas channel configured to bypass the turbocharger turbine, the method comprising:
- opening a first exhaust gas valve to discharge exhaust gas from at least one cylinder of a Z-type two-stroke combustion engine through the first exhaust gas channel;
- opening a second exhaust gas valve to discharge the exhaust gas from the at least one cylinder of the Z-type two-stroke combustion engine through the a-separate second exhaust gas channel bypass the turbocharger turbine;
- and
- controlling a pressure of the exhaust gas based on an amount of the exhaust gas remaining in the at least one cylinder by throttling a throttle valve positioned in the separate second exhaust gas channel.
Dependencies are inferred from the claim text.