Abstract: A power system includes an intake arrangement configured to intake charge air; a fuel arrangement configured to store a blend of methane (CH4) and hydrogen (H2) fuel; an engine configured to receive, ignite, and combust a mixture of the charge air and the blend of methane (CH4) and hydrogen (H2) fuel; and a controller coupled to selectively command such that, in a first mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge air and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a stoichiometric equivalence ratio; and in a second mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a lean equivalence ratio.

Abstract: A power system for a work vehicle is provided and includes an intake arrangement configured to intake charge air; a fuel arrangement including a first fuel tank configured to store a first fuel and a second fuel tank configured to store a second fuel; a compression ignition engine including a plurality of piston-cylinder sets configured to receive, ignite, and combust the first fuel, the second fuel, or a combination of the first and second fuels from the fuel arrangement with the charge air from the intake arrangement to generate mechanical power and exhaust gas; and an exhaust gas recirculation (EGR) arrangement configured to direct a portion of the exhaust gas back into the compression ignition engine. The fuel arrangement is arranged to selectively inject the second fuel into the EGR arrangement.

Abstract: The power system includes a compression ignition engine configured to combust intake gas; an intake arrangement configured to intake charge air; an exhaust arrangement to receive a first portion of the exhaust; an EGR arrangement to receive a second portion of the exhaust as EGR gas; a first mixer to selectively mix a first portion of the EGR gas and the charge air as mixed gas; an intake heat exchanger positioned upstream or downstream of the first mixer and respectively configured to receive one of the intake charge air or the mixed gas such that heat is exchanged with engine coolant; a second mixer positioned downstream of the first mixer and the intake heat exchanger and configured to selectively mix a second portion of the EGR gas and the mixed gas to form the intake gas; and an intake manifold configured to direct the intake gas into the engine.

Abstract: A power system includes an intake arrangement configured to intake charge air; a fuel arrangement configured to store a blend of methane (CH4) and hydrogen (H2) fuel; an engine configured to receive, ignite, and combust a mixture of the charge air and the blend of methane (CH4) and hydrogen (H2) fuel; and a controller coupled to selectively command such that, in a first mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge air and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a stoichiometric equivalence ratio; and in a second mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a lean equivalence ratio.

Abstract: The power system includes a compression ignition engine configured to combust intake gas; an intake arrangement configured to intake charge air; an exhaust arrangement to receive a first portion of the exhaust; an EGR arrangement to receive a second portion of the exhaust as EGR gas; a first mixer to selectively mix a first portion of the EGR gas and the charge air as mixed gas; an intake heat exchanger positioned upstream or downstream of the first mixer and respectively configured to receive one of the intake charge air or the mixed gas such that heat is exchanged with engine coolant; a second mixer positioned downstream of the first mixer and the intake heat exchanger and configured to selectively mix a second portion of the EGR gas and the mixed gas to form the intake gas; and an intake manifold configured to direct the intake gas into the engine.

Abstract: An engine system includes an internal combustion engine, an energy storage device configured to provide electrical power, and an electrified air-boost system powered by the electrical power from the energy storage device to boost intake air to the engine, with the electrified air-boost system further including an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the engine. The engine system also includes a controller operably connected with the electrified air-boost system, with the controller configured to monitor engine speed and engine load during operation of the engine, identify an impending engine stall condition based on the monitored engine speed and engine load, and when the impending engine stall condition is identified, temporarily operate the electrified air-boost system to boost the intake air to the engine, thereby boosting a torque output of the engine.

Abstract: An engine system includes an engine with an intake manifold and an exhaust manifold, a turbocharger including a turbine in communication with the exhaust manifold and a compressor in communication with the intake manifold, and a regulator configured to control a flow of exhaust gas through the turbine. A controller of the engine system is operably connected with the regulator and is configured to monitor an engine load and an exhaust gas temperature during operation of the engine, identify a proscribed engine NOx emissions level based on the engine load and the exhaust gas temperature and, when the proscribed engine NOx emissions level is identified, modify the flow of exhaust gas through the turbine to reduce the energy extracted from the exhaust gas by the turbine and reduce a drive power provided to the compressor, thereby reducing a flow of intake air provided to the intake manifold by the compressor.

Abstract: An engine system includes an engine with an intake manifold and an exhaust manifold, a turbocharger including a turbine in communication with the exhaust manifold and a compressor in communication with the intake manifold, and a regulator configured to control a flow of exhaust gas through the turbine. A controller of the engine system is operably connected with the regulator and is configured to monitor an engine load and an exhaust gas temperature during operation of the engine, identify a proscribed engine NOx emissions level based on the engine load and the exhaust gas temperature and, when the proscribed engine NOx emissions level is identified, modify the flow of exhaust gas through the turbine to reduce the energy extracted from the exhaust gas by the turbine and reduce a drive power provided to the compressor, thereby reducing a flow of intake air provided to the intake manifold by the compressor.

Abstract: An engine system includes an internal combustion engine, an energy storage device configured to provide electrical power, and an electrified air-boost system powered by the electrical power from the energy storage device to boost intake air to the engine, with the electrified air-boost system further including an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the engine. The engine system also includes a controller operably connected with the electrified air-boost system, with the controller configured to monitor engine speed and engine load during operation of the engine, identify an impending engine stall condition based on the monitored engine speed and engine load, and when the impending engine stall condition is identified, temporarily operate the electrified air-boost system to boost the intake air to the engine, thereby boosting a torque output of the engine.

Abstract: An internal combustion engine system includes an engine block having one or more piston-cylinder arrangements communicating with an intake manifold and an exhaust manifold, a high-pressure (HP) turbocharger including an HP turbine in communication with the exhaust manifold and including an HP compressor in communication with the intake manifold, a low-pressure (LP) turbocharger including an LP turbine in communication with the exhaust manifold via the HP turbine and including an LP compressor in communication with the intake manifold via the HP compressor, an exhaust gas recirculation (EGR) system including an EGR pump upstream of the HP turbine and in communication with the exhaust manifold at an inlet side of the EGR pump and in communication with the intake manifold at an outlet side of the EGR pump, and an intercooler interposed between the LP compressor and the HP compressor.