| 摘要 |
A method is provided for operating an engine. The engine is configured to post inject a quantity of fuel into a combustion chamber and includes, but is not limited to a Diesel Oxidation Catalyst (DOC) that has an inlet and an outlet. The method includes, but is not limited to determining an open loop post injection quantity qpost-OL of fuel as a function of a target temperature TOtarget for the Diesel Oxidation Catalyst (DOC) outlet, the step of determining the current temperature TO at the Diesel Oxidation Catalyst (DOC) outlet and the step of determining, for the temperature TO, a closed loop post injection quantity qpost-CL of fuel needed for correcting the open loop post injection quantity qpost-OL for determining a correct post injection fuel quantity qpost needed to match the desired DOC heat release related to the target temperature TOtarget when operating the engine system. |
