Patent ID: 7849834

Claim:
A method of controlling an internal combustion engine, the internal combustion engine having a plurality of combustion chambers, at least one exhaust manifold, and at least one exhaust valve for each of said plurality of combustion chambers for selectively fluidly connecting each of said plurality of combustion chambers with said at least one exhaust manifold, the method comprising: running a first cycle, the first cycle including: injecting fuel into at least one of the plurality of combustion chambers in accordance with at least one first injection parameter; combusting the fuel thereby creating exhaust gas; opening at least one exhaust valve to transfer exhaust gas from at least one of the plurality of combustion chambers to the at least one exhaust manifold, thereby influencing a first exhaust gas pressure in the exhaust manifold; enabling a transfer of exhaust gas from the exhaust manifold to at least one of the plurality of combustion chambers, using the first exhaust gas pressure to achieve a first desired level of at least one emission parameter during a combustion event; and running a second cycle, the second cycle including: injecting fuel into at least one of the plurality of combustion chambers in accordance with at least one second injection parameter different from the at least one first injection parameter; combusting the fuel thereby creating exhaust gas; opening at least one exhaust valve to transfer exhaust gas from at least one of the plurality of combustion chambers to the at least one exhaust manifold, thereby influencing a second exhaust gas pressure in the exhaust manifold different from the first exhaust gas pressure; enabling a transfer of exhaust gas from the exhaust manifold to at least one of the plurality of combustion chambers, using the second exhaust gas pressure to achieve a second desired level of at least one emission parameter during a combustion event; and repeating the first and second cycles, wherein repeating the first and second cycles includes repeatedly modifying an amount of exhaust gas transferred into the at least one combustion chamber by changing to the respective at least one first or second injection parameter.