Abstract:
A system and method to control engine valve timing of an internal combustion engine. Electromechanical valves are controlled to improve engine fuel economy. Further, the method can adjust valve operation to provide air-fuel charge motion and increase combustion stability.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben einer Hubkolben-Verbrennungskraftmaschine in einem Motorbremsbetrieb, bei welchem in dem Motorbremsbetrieb innerhalb eines Arbeitsspiels zumindest ein Auslassventil wenigstens eines Zylinders ein erstes Mal geschlossen (1S1, 1S1", 1S1'"), daran anschließend ein erstes Mal geöffnet (1O1, 1O1", 1O1"'), daran anschließend ein zweites Mal geschlossen (2S1, 2S1', 2S1", 2S1'") und daran anschließend ein zweites Mal geöffnet (2O1, 2O1", 2O1'") wird, um dadurch mittels eines Kolbens des Zylinders in dem Zylinder verdichtetes Gas aus dem Zylinder abzulassen, wobei das Auslassventil nach dem ersten Öffnen (1O1, 1O1", 1O1'") und vor dem zweiten Schließen (2S1, 2S1', 2S1", 2S1"') so lange offen gehalten wird, dass der Zylinder mit Gas, das über wenigstens einen Auslasskanal aus wenigstens einem zweiten Zylinder der Hubkolben-Verbrennungskraftmaschine ausströmt, gefüllt wird, wobei beim Aktivieren des Motorbremsbetriebs wenigstens eine Nockenwelle zum Betätigen wenigstens eines Gaswechselventils der Hubkolben-Verbrennungskraftmaschine verstellt wird.
Abstract:
La presente invención se refiere a un motor compuesto que comprende un motor de combustión interna y una primera turbina y que presenta un elevado rendimiento térmico debido a que aprovecha el calor de los gases de escape para calentar parte del aire dispuesto en un depósito auxiliar que se utilizará para la generación de energía eléctrica o la transmisión de energía mecánica a través del eje de salida de una turbina accionada por dicho aire, donde el aire dispuesto en el depósito auxiliar es separado en un ciclo inferior que aprovecha el calor de los gases de escape generados a partir de la mezcla del resto del aire de admisión y el combustible durante un ciclo superior.
Abstract:
Valve assembly and method in which a valve member is connected to an elongated lever arm for controlling communication between two chambers in an engine. The valve assembly is disposed at least partially within one of the chambers, and the valve member is moved between open and closed by an actuator connected to the lever arm. In some disclosed embodiments, a pilot valve is opened to equalize pressure on both sides of the valve member prior to moving the valve member toward the open position. In others, a piston in an expansion cylinder is driven by hot, expanding gases from a separate combustion chamber or heat exchanger.
Abstract:
In a control apparatus for an internal combustion engine having a valve timing control means controlling the timing opening and closing of an intake valve disposed in an intake port communicating with a cylinder of the internal combustion engine, when the internal combustion engine is being started from a cold condition, multi-stroke operation is set, in which one combustion cycle of the internal combustion engine includes two or more intake and compression strokes, formed by a first intake stroke and the first compression stroke and a second intake stroke and compression stroke, followed by a combustion stroke and an exhaust stroke. The valve timing control means controls a lift of the intake valve during the first intake stroke and the first compression stroke to a low lift amount, which is smaller than the normal lift amount required for intake of a requested intake air amount, and controls the lift of the intake valve in a second intake and a second compression stroke to the normal lift amount.
Abstract:
A rotary manifold for a rotor assembly of a cohesion-type drive includes a manifold body extending along a drive axis for rotation thereabout, a first ductwork internal the body for fluid communication with a plurality of first chambers of the drive, and a second ductwork internal the body for fluid communication with a plurality of second chambers of the drive. The second ductwork is in fluid isolation of the first ductwork.
Abstract:
A rotary manifold for a rotor assembly of a cohesion-type drive includes a manifold body extending along a drive axis for rotation thereabout, a first ductwork internal the body for fluid communication with a plurality of first chambers of the drive, and a second ductwork internal the body for fluid communication with a plurality of second chambers of the drive. The second ductwork is in fluid isolation of the first ductwork.
Abstract:
A hybrid internal combustion engine having a cylinder, a piston disposed within the cylinder, the piston constructed and arranged to reciprocate within the cylinder, and a combustion chamber defined by the cylinder and the top of the piston. The hybrid internal combustion engine also includes an exhaust manifold and a heat exchanger disposed within the exhaust manifold. A pump disposed between the heat exchanger and a fluid reservoir is provided to deliver fluid from the reservoir to the heat exchanger, whereby the fluid in the heat exchanger is heated and turned into high pressure gas (HPG) when the combustion gases are exhausted from the combustion chamber via the exhaust manifold. The resulting HPG may then be introduced into the combustion chamber to provide a HPG power stroke.
Abstract:
Valve assembly and method in which a valve member is connected to an elongated lever arm for controlling communication between two chambers in an internal combustion engine. The valve assembly is disposed at least partially within one of the chambers, and the valve member is moved between open and closed by an actuator connected to the lever arm. In some disclosed embodiments, a pilot valve is opened to equalize pressure on both sides of the valve member prior to moving the valve member toward the open position. In others, where a piston in an expansion cylinder is driven by hot, expanding gases from a separate combustion chamber, the exhaust valve is closed before the piston has completed its exhaust stroke, and pressure is allowed to build up in the expansion cylinder to a level corresponding to the pressure in the combustion chamber before the valve member is moved toward the open position.
Abstract:
An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes and the fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be in a closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve.