Abstract:
The invention relates to a control system (202) for an internal combustion engine (ICE) (200) comprising an air storage container and a valve system for boosting intake air pressure in situations where the demand cannot be fulfilled by the turbocharger. The invention also relates to a corresponding method for controlling such an ICE (200) and avoiding turbo-lag, and to a thereto related computer program.
Abstract:
The aim of the invention is to detect the hydrostatic lock before in a more reliable way (1). The starting event system is equipped with a speed measurement arrangement (8, 9) and a control unit (7). The control unit has an acceleration calculation unit (10) to calculate acceleration of the crankshaft (6) by using the received speed measurement data. The system is further provided with an air compression device (11) and an air delivery arrangement (14, 15, 16) to deliver the compressed air into cylinders (2) of the engine in order to rotate the crankshaft slowly. The control unit (10) is further provided with a detector unit (19) that is in connection with the acceleration unit in order to detect a hydrostatic lock in at least one cylinder of the engine.
Abstract:
Regenerative intensifier systems that can receive fluids from landfills, anaerobic digesters, wastewater treatment plants, animal waste lagoons, swamp gas, decaying permafrost, and oceanic clathrate decomposition interchangeably with natural gas and other available fuels and substances and provide suitably conditioned fuel for operation of an engine, fuel cell, or other industrial and/or chemical processes. Alternatively, gases collected from landfills, waste digesters, bakeries, breweries, ethanol plants, calciners, power plant stacks, electrolyzers, and/or natural gas that may be delivered at relatively low pressures can be converted to high pressure and/or high purity constituents to enable efficient utilization as a transportation fuel and/or industrial feedstock or chemical plant reactant.
Abstract:
A method for operating a turbocharged internal combustion engine (1), comprises the steps of operating the engine (1) by feeding combustion air and/or fuel into one or more combustion chambers (3a-3f) via intake openings/inlet valves (4a-4f), combusting the air and fuel and having a flow of exhaust gases flow out via exhaust openings/outlet valves (11a-11f), with the flow of exhaust gases driving a turbine portion (20a) which in turn drives a compressor portion (20b) for compressing combustion air prior to being fed into the one or more combustion chambers (3a-3f). The secondary air injection means (25-27) are activated for injecting pressurized secondary air into the engine (1) during an accelerating operation of the engine (1), in such a way that during said accelerating operation of the engine (1), one or more loads of pressurized secondary air are injected into the outlet manifold (12).
Abstract:
In split-cycle engines and air hybrid split-cycle engines, the sizing of the crossover passage is critical to engine efficiency. Efficiency can be improved by sizing the crossover passage volume to be small relative to the volume of the cylinders, and in particular relative to the volume of the compression cylinder. This allows for a higher pressure in the crossover passage, which extends the duration of sonic flow from the crossover passage into the expansion cylinder and increases combustion pressure. The methods, systems, and devices disclosed herein generally involve sizing the crossover passages, cylinders, or other components of a split-cycle engine or air hybrid split-cycle engine to improve efficiency.
Abstract:
Moteur hybride thermique / pneumatique comprenant plusieurs cylindres (2-5) comprenant chacun une bielle synchronisée par un vilebrequin commun et une unité de commande (6), l'unité de commande (6) étant apte à faire fonctionner simultanément au moins un cylindre (2-5) en mode thermique et au moins un cylindre (2-5) en mode pneumatique. Procédé de commande d'un tel moteur.
Abstract:
In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall.that is located between the cylinder's intake and exhaust ports. The decompression port enables the release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve controls airflow through the passage, and is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder via the decompression port after intake and exhaust, port closure can also support other engine operations.
Abstract:
L'invention propose un moteur plurimodal à chambre active incluse comportant un cylindre (1) et un piston (2) qui divise le cylindre en une chambre active (CA) et une chambre de détente (CD), et dans lequel : de l'air comprimé contenu dans un réservoir (12) alimente directement l'admission du cylindre moteur (1), le remplissage de la chambre active incluse (CA) s'effectue à une pression d'admission constante à chaque tour moteur, cette pression d'admission étant dégressive au fur à mesure de l'abaissement de la pression dans le réservoir, le volume de la chambre active incluse (CA) est augmenté progressivement au fur et à mesure de l'abaissement de pression dans le réservoir (12), et des moyens permettent non seulement d'ouvrir l'orifice et le conduit d'admission (7) sensiblement au point mort haut de la course du piston, mais permettent aussi de modifier la durée et/ou le secteur angulaire de l'admission, ainsi que la section de passage de l'ouverture, et le volume de la chambre active incluse (CA) est dimensionné pour la pression maximum de stockage, puis est progressivement augmenté, grâce à quoi le moteur est un moteur autodétendeur.
Abstract:
Methods, systems, and devices are disclosed that generally involve split-cycle engines in which a combustion event is initiated in a crossover passage that interconnects a compression cylinder and an expansion cylinder of the split-cycle engine. In one embodiment, the compression piston leads the expansion piston by a phase shift angle so that, for example, a substantial amount of the combustion event can occur in the crossover passage at a constant volume.
Abstract:
An apparatus and method for improving vehicle performance by application of pneumatic boost to vehicle engines, including diesel engines having at least one turbocharger supplying air to the engine, in a manner which increases engine torque output while minimizing the potential for exceed various operating limits to the maximum practicable extent. The vehicle's pneumatic booster system controller implements strategies for shaping the rate of the air injection during a boost event, tailoring the air injection to obtain maximum engine torque output while respecting the operating limits, by controlling the timing, duration, quantity and/or injection pattern during a boost event to achieve a refined distribution of compressed air injection over the course of the boost event to provide desired engine torque output and fuel efficiency while minimizing the potential for exceeding a wide variety of operation limits, regulatory, engineering and passenger comfort limits.