The invention relates to a method for controlling braking of a vehicle (1), comprising a diesel engine (100) and an exhaust after treatment (EAT) system (200) for treating exhaust from said diesel engine (100), a set of ground engaging members (300), and a transmission (400) between said set of ground engaging members (300) and said diesel engine (100). The method comprises: —In response to a determined present engine speed being equal to or less than a current engine braking minimum limit speed: changing the gear ratio of said transmission (400) such that an updated engine speed is obtained, whereby a determined present engine speed is above said current engine braking minimum limit speed (S60), and—In response to the determined present engine speed being above said current engine braking minimum limit speed: engine braking so as to decrease said present engine speed (S70). The invention also relates to a computer program, a computer readable medium, a control unit, and a vehicle comprising a control unit.

A rocker arm assembly operable in a first mode and a second mode, the rocker arm assembly selectively opening first and second engine valves based on rotation of a cam shaft having a first cam lobe and a second cam lobe, includes: a rocker shaft; a first rocker arm assembly having a first rocker arm that receives the rocker shaft and rotates around the rocker shaft in the first mode based on engagement with the first cam lobe; a second rocker arm assembly having a second rocker arm that receives the rocker shaft and rotates around the rocker shaft and selectively act on one of the first and second engine valves in the second mode based on selective engagement with the second cam lobe; and a biasing assembly that cooperates with the second rocker arm to bias the second rocker arm to a neutral position.

A rocker arm assembly operable in a first mode and a second mode, the rocker arm assembly selectively opening first and second engine valves based on rotation of a cam shaft having a first cam lobe and a second cam lobe, includes: a rocker shaft; a first rocker arm assembly having a first rocker arm that receives the rocker shaft and rotates around the rocker shaft in the first mode based on engagement with the first cam lobe; a second rocker arm assembly having a second rocker arm that receives the rocker shaft and rotates around the rocker shaft and selectively act on one of the first and second engine valves in the second mode based on selective engagement with the second cam lobe; and a biasing assembly that cooperates with the second rocker arm to bias the second rocker arm to a neutral position.

A method includes operating an engine system including a plurality of cylinders, a plurality of fuel injectors configured to provide fuel the plurality of cylinders, a compression braking system configured to selectably brake at least a first set of the plurality of cylinders, and an exhaust aftertreatment system including at least one catalyst. The method includes determining a condition for brake-fuel operation and, in response to the act of determining, operating the engine in a brake-fuel mode wherein the compression brake is actuated to provide compression braking of the first set of the plurality of cylinders and a second set of the plurality of cylinders receives and combust fuel provided from respective ones of the plurality of fuel injectors.

A method for engine braking of a vehicle includes: —detecting a state indicative of a desired engine braking of the vehicle, and—controlling an engine speed to a set engine speed target value by controlling a powertrain component in response to the detected state of a desired engine braking.

A method for engine braking of a vehicle includes: —detecting a state indicative of a desired engine braking of the vehicle, and—controlling an engine speed to a set engine speed target value by controlling a powertrain component in response to the detected state of a desired engine braking.

An embodiment device includes an auxiliary brake including a retarder selectively operated to consume an output of a transmission to generate a braking force and an engine brake selectively operated to increase a flow resistance of an exhaust gas discharged from an engine to generate a braking force, a gas flow volume controller configured to open or close flow paths of an engine intake line and an engine exhaust line, and a controller configured to compare a first braking force difference with a predetermined reference braking force when the auxiliary brake is operated during coasting traveling and to determine and control an opening rate of the gas flow volume controller based on the first braking force difference and an engine speed when the first braking force difference is less than the reference braking force.

An embodiment device includes an auxiliary brake including a retarder selectively operated to consume an output of a transmission to generate a braking force and an engine brake selectively operated to increase a flow resistance of an exhaust gas discharged from an engine to generate a braking force, a gas flow volume controller configured to open or close flow paths of an engine intake line and an engine exhaust line, and a controller configured to compare a first braking force difference with a predetermined reference braking force when the auxiliary brake is operated during coasting traveling and to determine and control an opening rate of the gas flow volume controller based on the first braking force difference and an engine speed when the first braking force difference is less than the reference braking force.

Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, valves of a cylinder are deactivated in a closed state in response to an indication of degradation of a valve of the cylinder. Further, fuel flow to the cylinder may be stopped via ceasing to inject fuel to the cylinder.

Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, valves of a cylinder are deactivated in a closed state in response to an indication of degradation of a valve of the cylinder. Further, fuel flow to the cylinder may be stopped via ceasing to inject fuel to the cylinder.