The present disclosure relates to a hybrid electric vehicle configured to respond to a required torque while reducing exhaust gas emission in a situation where catalyst heating of an engine is not completed, and a driving control method for the hybrid electric vehicle. The driving control method of the hybrid electric vehicle comprises entering catalyst heating control of an engine when there is a request for catalyst heating and a required torque exceeds a first threshold during traveling in a first mode using an electric motor as a driving source, and entering acceleration feeling increase control when the required torque exceeds a second threshold greater than the first threshold, in which the second threshold is set between the first threshold and a third threshold that is a reference for an entry into a second mode using the engine as the driving source.

A vehicle system includes an engine, a transmission including a torque converter, a clutch configured to selectably couple and decouple the torque converter, and a gearset, a selective catalytic reduction (SCR) exhaust aftertreatment system. An electronic control system may be operatively coupled with the engine, the electronically controllable clutch, and the SCR exhaust aftertreatment system. The electronic control system is configured to evaluate whether an SCR catalyst temperature satisfies at least one minimum temperature criterion, in response to the SCR catalyst temperature satisfying the minimum temperature criterion, permit a neutral at stop operation wherein the electronically controllable clutch is controlled to selectably decouple the torque converter and the one or more gears at least in part in response to the vehicle system being in a stopped state, and in response to the SCR catalyst temperature not satisfying the minimum temperature criterion, prevent the neutral at stop operation.

A vehicle system includes an engine, a transmission including a torque converter, a clutch configured to selectably couple and decouple the torque converter, and a gearset, a selective catalytic reduction (SCR) exhaust aftertreatment system. An electronic control system may be operatively coupled with the engine, the electronically controllable clutch, and the SCR exhaust aftertreatment system. The electronic control system is configured to evaluate whether an SCR catalyst temperature satisfies at least one minimum temperature criterion, in response to the SCR catalyst temperature satisfying the minimum temperature criterion, permit a neutral at stop operation wherein the electronically controllable clutch is controlled to selectably decouple the torque converter and the one or more gears at least in part in response to the vehicle system being in a stopped state, and in response to the SCR catalyst temperature not satisfying the minimum temperature criterion, prevent the neutral at stop operation.

A powertrain for a machine includes an internal combustion engine, an aftertreatment system including a selective catalytic reduction (SCR) catalyst for treating exhaust gases from the internal combustion engine, and a continuously variable transmission operatively coupled to the internal combustion engine. An electronic controller can measure a catalyst temperature of the SCR catalyst and can inversely adjust an engine speed and a CVT output to selectively regulate a catalyst temperature of the SCR catalyst. In an embodiment, the CVT may be a hydro-mechanical transmission including a hydrostatic transmission and a mechanical transmission.

A system includes a powertrain system including a transmission, and a controller coupled to the powertrain system. The controller is structured to: receive operation data regarding operation of the powertrain system; determine the powertrain system is operating in a non-nominal state responsive to the operation data; adjust a shift schedule for the transmission based on the determined non-nominal state; and control the transmission based on the adjusted shift schedule.

A system includes a powertrain system including a transmission, and a controller coupled to the powertrain system. The controller is structured to: receive operation data regarding operation of the powertrain system; determine the powertrain system is operating in a non-nominal state responsive to the operation data; adjust a shift schedule for the transmission based on the determined non-nominal state; and control the transmission based on the adjusted shift schedule.

A method for regulation of a concentration/fraction of one or several substances in an exhaust stream in a motor vehicle through control of its driveline. The motor vehicle includes a driveline comprising a combustion engine; a driveline comprising a combustion engine connected to a gearbox, and an exhaust system for removal of an exhaust stream from the engine. The method includes the step: controlling the driveline for activation or deactivation of coasting of the vehicle based on one or several first parameters P.sub.1 for the regulation of a concentration/fraction C.sub.EXIX.sub.EX of one or several substances T.sub.EX in the exhaust stream, where at least one of the or several first parameters P.sub.1 are a first concentration/fraction difference between the first concentration/fraction C.sub.1/X.sub.1 in the exhaust stream and a reference concentration/fraction C.sub.RefIX.sub.Ref. Further, a computer program, a computer program product, a system and a motor vehicle such a system are disclosed.

A system for a vehicle includes a powertrain system including an engine, a transmission, a drive shaft, and a final drive. The system also includes a controller communicably coupled to the powertrain system. The controller is structured to: receive vehicle operation data during operation of a vehicle; receive route data for a route of the vehicle, wherein the route data is received in advance of the vehicle traveling the route; determine a cylinder deactivation event has occurred based on the vehicle operation data; determine an adjustment to a shift schedule for the transmission based on at least one of the cylinder deactivation event and the route data; and provide a command to implement the adjustment with the transmission.

A method for regulating a temperature in an exhaust stream in a motor vehicle through control of its driveline. The motor vehicle includes a driveline having a combustion engine connected to a gearbox via a clutch device. The gearbox has several discrete gears. The driveline includes an exhaust system configured for the removal of an exhaust stream from the combustion engine. The method steps are: obtaining one or several first parameters P.sub.1, wherein at least one of first parameters P.sub.1 is a first temperature difference between a first temperature T.sub.1 in the exhaust system and a reference temperature T.sub.Ref; and controlling the gearbox, and thus controlling an operating point in the combustion engine, through downshift to a lower gear, and thus increasing engine speed and reducing a load on the combustion engine, if a value of the one or several first parameters P.sub.1 exceeds a first threshold, and an upshift to a higher gear, and thus reducing an engine speed and an increase of a load on the combustion engine, if a value for the one or several first parameters P.sub.1 is below a second threshold value. Further, a computer program, a computer program product, a system and a motor vehicle comprising such a system are disclosed.