Patent ID: 11946427
Assignee: VOLVO TRUCK CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. An engine system of a vehicle, the engine system comprising and engine configured to operate in at least a two-stroke combustion mode and a four-stroke combustion mode, and an exhaust aftertreatment system (EATS) configured to reduce emissions from the engine exhausts, the EATS comprising a control unit configured to:
determine predicted vehicle operational information comprising at least a predicted upcoming road event and a predicted engine operation associated with the upcoming road event,
estimate or predict a temperature of the EATS;
estimate or predict emissions out of the EATS, wherein the emissions out of the EATS are calculated emissions associated with the predicted engine operation;
in response to the temperature of the EATS is below a predetermined temperature threshold, and that the emissions out of the EATS is above a predetermined emission threshold, instruct the engine system to perform a primary NOx emission reducing activity by operating the engine in a two-stroke combustion mode;
subsequently to initiating the operation of the engine in a two-stroke combustion mode, and in response to the emissions out of the EATS is below the predetermined emission threshold, instructing the engine to change its engine operation from the two-stroke combustion mode to a four-stroke combustion mode.