Abstract: An exhaust gas assembly includes an exhaust gas tube configured to receive an exhaust gas from the internal combustion engine, which includes at least one cylinder. An oxidation catalytic device may be operatively connected to the exhaust gas tube and includes a catalyst. A first temperature sensor is operatively connected to the oxidation catalytic device. A controller is operatively connected to the first temperature sensor. A hydrocarbon injector is operatively connected to the controller and configured to selectively inject an amount of hydrocarbon at a hydrocarbon injection rate. The controller includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of controlling the hydrocarbon injection rate. The controller may be programmed to limit the hydrocarbon injection rate based at least partially on a combination of space velocity, temperature of the catalyst in the oxidation catalytic device and temperature of a particulate filter.

Abstract: An exhaust gas assembly includes an exhaust gas tube configured to receive an exhaust gas from the internal combustion engine, which includes at least one cylinder. An oxidation catalytic device may be operatively connected to the exhaust gas tube and includes a catalyst. A first temperature sensor is operatively connected to the oxidation catalytic device. A controller is operatively connected to the first temperature sensor. A hydrocarbon injector is operatively connected to the controller and configured to selectively inject an amount of hydrocarbon at a hydrocarbon injection rate. The controller includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of controlling the hydrocarbon injection rate. The controller may be programmed to limit the hydrocarbon injection rate based at least partially on a combination of space velocity, temperature of the catalyst in the oxidation catalytic device and temperature of a particulate filter.