Abstract: An engine and a method of operating an internal combustion engine is provided. The method comprises supplying a pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston, and operating the engine in an HCCI combustion mode. In at least some embodiments, a mixture of pressurized air and recirculated exhaust gas is supplied from an intake manifold to an air intake port of a combustion chamber in the cylinder. In some embodiments, the method further comprises causing an exhaust stream of an engine to contact a NOx adsorber.

Abstract: A method of operating an internal combustion engine including at least one cylinder and a piston slidable in the cylinder is provided. In at least one embodiment, the method includes: supplying a mixture of pressurized air and recirculated exhaust gas from an intake manifold to an air intake port of a combustion chamber in the cylinder; operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston; and operably controlling a fuel supply system to inject fuel into the combustion chamber via a common rail fuel injector.

Abstract: Engines and methods of controlling an engine may involve at least one fluid actuators associated with one or more engine intake and/or exhaust valves. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: An engine and method of operating an internal combustion engine with either a continuously variable speed transmission or electric drive is provided. The engine and method comprises operating the engine at its optimum engine speed throughout a range of vehicle speeds through, supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, and operating an air intake valve to open the air intake port to allow the pressurized air to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston. In at least one embodiment, the engine and method further comprises using a mixture of pressurized air and recirculated exhaust gas.

Abstract: An engine and method of operating an internal combustion engine is provided. The method comprises supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, operating an air intake valve to open the air intake port to allow the pressurized air to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston, and filtering particulate matter from an exhaust stream of the engine with a particulate filter.

Abstract: A method of ammonia production for a selective catalytic reduction system is provided. The method includes producing an exhaust gas stream within a cylinder group, wherein the first exhaust gas stream includes NOx. The exhaust gas stream may be supplied to an exhaust passage and cooled to a predetermined temperature range, and at least a portion of the NOx within the exhaust gas stream may be converted into ammonia.

Abstract: A parasitic load control system is provided. The system may include an exhaust producing engine and a fuel pumping mechanism configured to pressurize fuel in a pressure chamber. The system may also include an injection valve configured to cause fuel pressure to build within the pressure chamber when in a first position and allow injection of fuel from the pressure chamber into one or more combustion chambers of the engine when in a second position. The system may further include a controller configured to independently regulate the pressure in the pressure chamber and the injection of fuel into the one or more combustion chambers, to increase a load on the fuel pumping mechanism, increasing parasitic load on the engine, thereby increasing a temperature of the exhaust produced by the engine.

Abstract: Certain exhaust after-treatment devices, at least periodically, require the addition of unburnt hydrocarbons in order to create reductant-rich exhaust conditions. The present disclosure adds unburnt hydrocarbons to exhaust from at least one combustion chamber by positioning, at least partially within a combustion chamber, a mixed-mode fuel injector operable to inject fuel into the combustion chamber in a first spray pattern with a small average angle relative to a centerline of the combustion chamber and a second spray pattern with a large average angle relative to the centerline of the combustion chamber. An amount of fuel is injected in the first spray pattern into a non-combustible environment within the at least one combustion chamber during at least one of an expansion stroke and exhaust stroke. The exhaust with the unburnt amount of fuel is moved into an exhaust passage via an exhaust valve.

Abstract: A method and apparatus for operating a compression ignition engine having a cylinder wall, a piston, and a head defining a combustion chamber. The method and apparatus includes delivering fuel substantially uniformly into the combustion chamber, the fuel being dispersed throughout the combustion chamber and spaced from the cylinder wall, delivering an oxidant into the combustion chamber sufficient to support combustion at a first predetermined combustion duration, and delivering a diluent into the combustion chamber sufficient to change the first predetermined combustion duration to a second predetermined combustion duration different from the first predetermined combustion duration.

Abstract: A power source is provided for use with selective catalytic reduction systems for exhaust-gas purification. The power source includes a first cylinder group with a first air-intake passage and a first exhaust passage, and a second cylinder group with a second air-intake passage and a second exhaust passage. The second air-intake passage is fluidly isolated from the first air-intake passage. A fuel-supply device may be configured to supply fuel into the first exhaust passage, and a catalyst may be disposed downstream of the fuel-supply device to convert at least a portion of the exhaust stream in the first exhaust passage into ammonia.

Abstract: Engines and methods of controlling an engine may involve one or more fluidically controlled actuators associated with engine intake and/or exhaust valves. In some examples, the actuators may be used to hold valves open. Timing of valve closing/opening and possible use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: An engine and method of operating an internal combustion engine with either a continuously variable speed transmission or electric drive is provided. The engine and method comprises operating the engine at its optimum engine speed throughout a range of vehicle speeds through, supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, and operating an air intake valve to open the air intake port to allow the pressurized air to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston. In at least one embodiment, the engine and method further comprises using a mixture of pressurized air and recirculated exhaust gas.

Abstract: Engines and methods of controlling an engine may involve one or more cams associated with engine intake and/or exhaust valves. In some examples, shifting the rotational phase of one or more cams advances and/or delays timing of the opening and/or closing of valves. Timing of valve closing/opening and possible use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: An internal combustion engine has an engine block defining at least one cylinder, a head, a piston, an air intake valve, and a valve actuator. The valve actuator has an actuator housing defining a tank and a bore, and a piston adapted to engages the air intake valve. The valve actuator further has a control valve disposed between the tank and the bore in the actuator housing. The control valve selectively moves between a first position where fluid is allowed to flow between the tank and the bore and a second position where the fluid is prevented from flowing to trap fluid in the bore, thereby preventing the engine valve from returning to a closed position. The internal combustion engine also has at least one turbocharger fluidly connected to the air intake port, and a fuel supply system operable to controllably inject fuel into the combustion chamber.

Abstract: An engine and method of operating an internal combustion engine is provided. The method comprises supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, operating an air intake valve to open the air intake port to allow the pressurized air to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston, and filtering particulate matter from an exhaust stream of the engine with a particulate filter.

Abstract: In one aspect, the present disclosure is directed to an internal combustion engine having an engine block defining at least one cylinder and a head connected with said engine block. The head has an air intake port and an exhaust port. The internal combustion engine also has a piston and a combustion chamber. The internal combustion engine further has an air intake valve movable to open and close the air intake port and an air supply system having at least one turbocharger fluidly connected to the air intake port. The internal combustion engine additionally has a fuel supply system operable to inject fuel into the combustion chamber, a cam assembly selectively mechanically linked to the air intake valve to move the air intake valve, and an electromagnetic actuator configured to decouple the cam assembly from the air intake valve and control movement of the air intake valve.

Abstract: Engines and methods of controlling an engine may involve at least one fluid actuators associated with one or more engine intake and/or exhaust valves. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: A method of operating an internal combustion engine including at least one cylinder and a piston slidable in the cylinder is provided. In at least one embodiment, the method includes: supplying a mixture of pressurized air and recirculated exhaust gas from an intake manifold to an air intake port of a combustion chamber in the cylinder; operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston; and operably controlling a fuel supply system to inject fuel into the combustion chamber via a common rail fuel injector.

Abstract: An engine and a method of operating an internal combustion engine is provided. The method comprises supplying a pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston, and operating the engine in an HCCI combustion mode. In at least some embodiments, a mixture of pressurized air and recirculated exhaust gas is supplied from an intake manifold to an air intake port of a combustion chamber in the cylinder. In some embodiments, the method further comprises causing an exhaust stream of an engine to contact a NOx adsorber.

Abstract: Engines and methods of controlling an engine may include producing ammonia from exhaust gas and using the ammonia to reduce certain emission components of the exhaust. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.