Work vehicle and aftertreatment system therefor

A work vehicle, the work vehicle comprising:

• an engine that generates exhaust gases that flow through an exhaust flow path;
• a diesel oxidation catalyst (DOC) disposed in the exhaust flow path;
• a nitrogen-oxide (NOx) reduction device disposed in the exhaust flow path;
• a tank of hydrogen gas;
• a temperature sensor sensing a temperature associated with the exhaust gases in the exhaust flow path proximate the DOC;
• a flow control device between the tank of hydrogen gas and the exhaust flow path between the engine and the DOC, wherein the flow control device is operable to control a flow of hydrogen gas from the tank of hydrogen gas into the exhaust flow path;
• and
• a controller having a processor and memory architecture, wherein the controller is configured to operate the flow control device;
• wherein the flow of hydrogen gas is adjusted in accordance with the sensed temperature;
• and
• wherein the controller is configured to estimate an expected change in an operating load of the engine and operate the flow control device in accordance with the expected change in the operating load.

An aftertreatment system for a work vehicle having an engine that generates exhaust gases flowing through an exhaust flow path to an exhaust vent, the aftertreatment system comprising:

• a diesel oxidation catalyst (DOC) disposed in the exhaust flow path;
• a nitrogen-oxide (NOx) reduction device disposed in the exhaust flow path;
• a temperature sensor sensing a temperature associated with the exhaust gases in the exhaust flow path proximate the DOC;
• a tank of hydrogen gas;
• and
• a flow control device between the tank of hydrogen gas and the exhaust flow path between the engine and the DOC, wherein the flow control device is operable to control a flow of hydrogen gas from the tank of hydrogen gas into the exhaust flow path;
• wherein the flow of hydrogen gas is adjusted in accordance with the sensed temperature such that the flow control device is operated to inject hydrogen gas into the exhaust flow path when the temperature exceeds a predetermined threshold temperature necessary for combustion of the hydrogen gas at the DOC.

An aftertreatment system for a work vehicle having an engine that generates exhaust gases flowing through an exhaust flow path to an exhaust vent, the aftertreatment system comprising:

• a diesel oxidation catalyst (DOC) disposed in the exhaust flow path;
• a nitrogen-oxide (NOx) reduction device disposed in the exhaust flow path;
• a temperature sensor sensing a temperature associated with the exhaust gases in the exhaust flow path proximate the DOC;
• a tank of hydrogen gas;
• a flow control device between the tank of hydrogen gas and the exhaust flow path between the engine and the DOC, wherein the flow control device is operable to control a flow of hydrogen gas from the tank of hydrogen gas into the exhaust flow path;
• and
• a controller having a processor and memory architecture, wherein the controller is configured to operate the flow control device;
• wherein the flow of hydrogen gas is adjusted in accordance with the sensed temperature;
• and
• wherein the controller is configured to estimate an expected change in an operating load of the engine and operate the flow control device in accordance with the expected change in the operating load.