Abstract: A method for increasing temperature of an aftertreatment device configured to treat emissions from a diesel engine includes adjusting intake valve closure timing.

Abstract: A boost system for an engine is described. In one example, the boost system provides air to an engine cylinder via a converging-diverging valve seat. The system can reduce turbocharger lag during some conditions.

Abstract: In a mechanical apparatus having a diesel engine including a combustion chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine and an intake valve for passing air into the combustion chamber, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber at a first intake valve closure timing, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber at a second intake valve closure timing to thereby increase the temperature of exhaust emitted by the diesel engine.

Abstract: In a mechanical apparatus having a diesel engine including a combustion chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine and an intake valve for passing air into the combustion chamber, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber at a first intake valve closure timing, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber at a second intake valve closure timing to thereby increase the temperature of exhaust emitted by the diesel engine.

Abstract: A boost system for an engine, comprising an engine having at least a cylinder; a fuel injector coupled to said cylinder; a compression device coupled to said engine; a compressed air storage device coupled to said compression device and configured to deliver compressed air to an air flow amplifier device located in the inlet air passageway to said cylinder; and a controller to adjust an amount of fuel injection to account for variation of air delivered to said cylinder from said flow amplifier device.

Abstract: A boost system for an engine, comprising an engine having at least a cylinder; a fuel injector coupled to said cylinder; a compression device coupled to said engine; a compressed air storage device coupled to said compression device and configured to deliver compressed air to an air flow amplifier device located in the inlet air passageway to said cylinder; and a controller to adjust an amount of fuel injection to account for variation of air delivered to said cylinder from said flow amplifier device.

Abstract: Systems and methods for reducing or eliminating backlash to control gear rattle include a planetary gear set with a planet carrier including a first part that supports at least one forward-torque carrying planet gear that has at least one tooth contacting a drive side of gear teeth of an associated sun gear and ring gear and a second part that supports at least one reverse-torque carrying gear that has at least one tooth contacting a coast side of gear teeth of the associated sun gear and ring gear, the second part of the carrier being rotationally biased relative to the first part to reduce or eliminate effective backlash of the gear set.

Abstract: A method for controlling an engine that operates with negative valve overlap between an intake valve and an exhaust valve during at least some conditions, the method comprising of providing an engine stop position with at least one cylinder near top dead center of piston position and adjusting at least one of the intake valve and the exhaust valve to position the at least one of the intake and exhaust valves of said at least one cylinder so that the at least one of said intake and exhaust valves is substantially closed at said engine stop position.

Abstract: A boost system for an engine, comprising an engine having at least a cylinder with an intake valve configured to cover and uncover an intake opening into the cylinder, the cylinder coupled to an intake manifold; a compression device coupled to said engine; and an air delivery nozzle configured to deliver pressurized air to said cylinder via said opening, where said nozzle has a converging-diverging shape so that discharged air is at a supersonic velocity at least under some operating conditions.

Abstract: Systems and methods for reducing or eliminating backlash to control gear rattle include a planetary gear set with a planet carrier including a first part that supports at least one forward-torque carrying planet gear that has at least one tooth contacting a drive side of gear teeth of an associated sun gear and ring gear and a second part that supports at least one reverse-torque carrying gear that has at least one tooth contacting a coast side of gear teeth of the associated sun gear and ring gear, the second part of the carrier being rotationally biased relative to the first part to reduce or eliminate effective backlash of the gear set.

Abstract: In a mechanical apparatus having a diesel engine including a combustion chamber, an intake valve for passing air into the combustion chamber, and an exhaust valve for passing exhaust from the chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber with a first quantity of fuel, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber with a second, greater quantity of fuel and varying at least one of an intake valve timing and an exhaust valve timing relative to a default valve timing to cause at least one of a compression loss and a pumping loss.

Abstract: In a mechanical apparatus having a diesel engine including a combustion chamber, an intake valve for passing air into the combustion chamber, and an exhaust valve for passing exhaust from the chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber with a first quantity of fuel, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber with a second, greater quantity of fuel and varying at least one of an intake valve timing and an exhaust valve timing relative to a default valve timing to cause at least one of a compression loss and a pumping loss.

Abstract: In a mechanical apparatus having a diesel engine including a combustion chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine and an intake valve for passing air into the combustion chamber, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber at a first intake valve closure timing, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber at a second intake valve closure timing to thereby increase the temperature of exhaust emitted by the diesel engine.

Abstract: A method for controlling an engine that operates with negative valve overlap between an intake valve and an exhaust valve during at least some conditions, the method comprising of providing an engine stop position with at least one cylinder near top dead center of piston position and adjusting at least one of the intake valve and the exhaust valve to position the at least one of the intake and exhaust valves of said at least one cylinder so that the at least one of said intake and exhaust valves is substantially closed at said engine stop position.