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

Claim 0:
1. A method for controlling the operation of an engine system in a vehicle, the engine system comprising an 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 method comprising:
determining predicted vehicle operational information comprising at least a predicted upcoming road event and a predicted engine operation associated with the upcoming road event,
estimating or predicting a temperature of the EATS;
estimating or predicting 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, performing 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, changing engine operation from the two-stroke combustion mode to a four-stroke combustion mode.