Abstract:
The present disclosure generally relates to a control system (50) configured to be used in a turbocharged internal combustion engine (10). The disclosed control system (50) may comprise an exhaust throttle valve (54) configured to be disposed downstream of a turbine (42) of a turbocharger and to control a flow of exhaust gas originating from at least one cylinder (26A to 26D). The disclosed control system (50) may further comprise a control unit (52) connected to the exhaust throttle valve (54) and configured to determine a differential pressure of the air/fuel-mixture across an intake throttle valve (27) disposed upstream of the at least one cylinder (26A to 26D), and, if the differential pressure exceeds a differential pressure threshold, adjust the exhaust throttle valve (54) such that the differential pressure of the air/fuel-mixture across the intake throttle valve (27) reduces.
Abstract:
A gaseous-fuelled internal combustion engine and a method of operating same are provided for improving combustion stability and reducing emissions of NOx, PM, and unburned hydrocarbons. The method comprises fuelling an internal combustion engine with hydrogen and natural gas, which can be directly injected into the combustion chamber together or introduced separately. Of the total gaseous fuel delivered to the engine, at least 5% by volume at standard temperature and pressure is hydrogen. For at least one engine operating condition, the ratio of fuel rail pressure to peak in-cylinder pressure is at least 1.5: 1. The engine comprises a combustion chamber defined by a cylinder, a cylinder head, and a piston movable within the cylinder; and a fuel injection valve operable for introducing the gaseous fuel mixture directly into the combustion chamber, or two separate fuel injection valves for introducing the methane and hydrogen separately. An electronic controller is in communication with actuator(s) for the fuel injection valve(s) for controlling timing for operating the fuel injection valve(s). The engine has a compression ratio of at least 14:1.
Abstract:
Cassette based system (11) for hydrogen storage, distribution and recovery including a cassette (110) containing a hydrogen storing material (115) from which hydrogen can be recovered in a hydrogen recovery system (130). Hydrogen storing materials (115) include ones that may be removed from the cassette (110) for hydrogen recovery and ones that may be heated within the cassette (110) for hydrogen recovery. The cassette (110) may be distributed through a common carrier as a non-hazardous material. A hydrogen network may be used to obtain information associated with hydrogen storage, recovery and utilization from various components of the network.
Abstract:
A method of controlling a locomotive diesel engine using a three-component fuel mixture consisting of gaseous and liquid fuels and air in which the diesel is controlled by simultaneously changing the amount of gaseous and liquid fuels supplied to the cylinders, while the amount of air is determined by the amount of supplied fuels in such a way as to ensure that the excess air coefficient is maintained at a given range. As well as a locomotive diesel engine comprising a liquid fuel injection system, a gas fuel injection system and an air supply system to the cylinders, and a power control system which contains a throttle valve installed in the intake manifold.
Abstract:
A method for fuelling an internal combustion engine, and a fuel system for delivering a variety of fuel types to the engine, configured to accommodate liquid fuels such as gasoline, ethanol or a blend thereof, and gaseous fuels such as CNG, LNG or LPG. The engine is configured to operate on any of the designated liquid fuels, and can switch between the liquid and gaseous fuels. The fuel system includes a common delivery arrangement, for selectively delivering fuel into the combustion chamber of each cylinder of the engine, comprising a fluid delivery injector and a liquid metering device configured for operation in concert. The same common fluid delivery injector is used for delivery of gaseous fuel only, delivery of liquid fuel only (by way of an air assist delivery process), or delivery of a fuel mixture comprising the gaseous fuel and the liquid fuel.
Abstract:
During transition between operating modes on a dual fuel engine, when the engine switches from operating with one fuel to operating with another fuel, there has been the problem of maintaining engine torque within a predetermined range. An improved method for operating an internal combustion engine comprises selecting between operating in a liquid fuel mode with a liquid fuel and a dual fuel mode with a liquid fuel and a gaseous fuel; adjusting an air system to set-points associated with one of the dual fuel mode when transitioning to the dual fuel mode and the liquid fuel mode when transitioning to the liquid fuel mode, as a function of engine operating conditions; and adjusting at least one of liquid fuel injection quantity and liquid fuel injection timing in response to changes in the air system when transitioning to one of the dual fuel mode and the liquid fuel mode, as a function of engine operating conditions.
Abstract:
Die vorliegende Erfindung schafft ein Verfahren zur Emissionsminderung von Verbrennungskraftmaschinen, die mit flüssigem Kraftstoff betrieben sind, mit folgenden Verfahrensschritten: Reinigen, Kraftstoffkonditionieren, Reibungsmindern, Gaseinspeisen in das Verbrennungssystem der Verbrennungskraftmaschine und ein Verfahren zur Emissionsminderung von Verbrennungskraftmaschinen, die mit gasförmigem Kraftstoff betrieben sind, mit folgenden Verfahrensschritten: Reibungsmindern und Gaseinspeisen in das Verbrennungssystem der Verbrennungskraftmaschine. Eine erfindungsgemäße Verbrennungskraftmaschine weist ein Verbrennungssystem und ein Kraftstoffsystem zum Speichern von Kraftstoff und zum Zuführen von Kraftstoff zum Verbrennungssystem, ein Abgassystem, ein Gaseinspeisungssystem, das eingerichtet ist, Gas in das Verbrennungssystem der Verbrennungskraftmaschine einzuspeisen und ein Gaseinspeisungssystem, das eingerichtet ist, Gas in das Abgassystem der Verbrennungskraftmaschine einzuspeisen auf.
Abstract:
Gas-fed internal combustion engine, deriving from the modification of a pre-existing Diesel engine for stationary applications in which substantial modifications are made to the following components: combustion chamber in terms of modification of size and/or shape of the combustion chamber, ignition-feed system, geometry of the intake and/or exhaust manifold.
Abstract:
A fuel delivery system is disclosed which has a housing (3) having a chamber (310) in which an injector (20) is located. A liquid gas inlet (301) supplies liquid gas to chamber (310) so the liquid gas can in turn be supplied to the injector (20) for injection into a cylinder of an engine. A transfer tube (315) supplies liquid gas from the chamber (310) which is not ejected by the injector (20) to a vapour injector (313) which forms a regulator for regulating the pressure of the liquid gas and any vapour in the chamber (310). The use of the injector (313) as the pressure regulator overcomes problems associated with icing in the vicinity of the regulator which may otherwise impair proper operation of the regulator.