METHOD OF REDUCING WARM-UP TIME OF AN AFTERTREATMENT DEVICE AND A VEHICLE SYSTEM FOR THE SAME

摘要

A method of reducing warm-up time of an aftertreatment device and a vehicle system for the same are disclosed. Fuel is injected into a plurality of cylinders of an internal combustion engine which is controlled, via a controller. The fuel in a first subset of the plurality of cylinders is combusted to produce a first exhaust product having excess fuel. The fuel in a second subset of the plurality of cylinders is combusted to produce a second exhaust product having excess air. The first exhaust product is expelled through a turbocharger and a valve is actuated to route the second exhaust product away from a dedicated EGR system and downstream from the turbocharger. The excess fuel of the first exhaust product and the excess air of the second exhaust product are mixed downstream from the turbocharger to create an exothermic reaction that produces heat to warm up the aftertreatment device.

主权项

1. A method of reducing warm-up time of an aftertreatment device, the method comprising:
controlling, via a controller, an amount of fuel being injected into a plurality of cylinders of an internal combustion engine; combusting the fuel in a first subset of the plurality of cylinders to produce a first exhaust product having excess fuel; combusting the fuel in a second subset of the plurality of cylinders to produce a second exhaust product having excess air; expelling the first exhaust product through a turbocharger; actuating a valve to route the second exhaust product away from a dedicated exhaust gas recirculation system and downstream from the turbocharger; and mixing the excess fuel of the first exhaust product and the excess air of the second exhaust product downstream from the turbocharger to create an exothermic reaction that produces heat to warm up the aftertreatment device.