A liquefied gas treatment system includes: a liquefied gas supply line connected from a liquefied gas storing tank to a source of demand, a pump provided on the liquefied gas supply line, and configured to pressurize liquefied gas discharged from the liquefied gas storing tank, a heat exchanger provided on the liquefied gas supply line between the source of demand and the pump, and configured to heat exchange the liquefied gas supplied from the pump with heat transfer media, a media heater configured to heat the heat transfer media, a media circulation line connected from the media heater to the heat exchanger, and a controller configured to change a flow rate of the heat transfer media flowing into the media heater or calories supplied to the heat transfer media by the media heater on the basis of a flow rate of the liquefied gas supplied to the heat exchanger

A mixture-charged gas engine includes at least one cylinder. A combustion chamber delimited by a cylinder head, a cylinder wall, and a piston, which can be moved in the cylinder, is arranged in the at least one cylinder, and the combustion chamber is divided into a main combustion chamber and at least one pre-chamber fluidically connected to the main combustion chamber via at least one firing channel. An air-/combustion gas mixture can be supplied to the main combustion chamber via an inlet valve during an intake stroke of the piston. The mixture-charged gas engine is characterized in that a separate combustion gas supply is provided for the at least one pre-chamber.

A gaseous fuel feed apparatus includes a first injector and a second injector which are provided in each cylinder of a gas engine. The first injector injects a gaseous fuel into an intake passage. The second injector injects the gaseous fuel in an injecting direction intersecting with an injecting direction of the gaseous fuel injected by the first injector, such that the gaseous fuel injected by the second injector collides with the gaseous fuel injected by the first injector. Thus, the gaseous fuel injected by the first injector can be forcibly pressed toward a flow of an air by utilizing an injection energy of the gaseous fuel injected by the second injector. Further, the first injector and the second injector may be placed at the same position of the intake passage, and can be placed at a position of the intake passage that is adjacent to a combustion chamber.

Low-cost fuel injection systems for internal combustion engines, including vapor fuel engines are provided.

A controller for a gas engine includes a cycle detection unit 67 configured to detect a crank angle period of a single combustion cycle of an engine including a plurality of cylinders based on a crank angle detection value inputted from a crank angle detector 75, a misfire detection unit 69 configured to detect a misfire in a combustion chamber 37 based on an in-cylinder pressure detection value inputted from the in-cylinder pressure detector 59, and a simultaneous misfire determination unit 73 configured to determine a simultaneous misfire of more than one cylinder when a total number of cylinders where the misfire is detected in the single combustion cycle by the misfire detection unit 69 is not less than a preset threshold value of a cylinder number. The fuel gas to all of the cylinders is shut off when the simultaneous misfire of more than one cylinder in the single combustion cycle is determined by the simultaneous misfire determination unit 73.

An engine system in which blow-by gas with a specific gravity less than 1 with reference to air is generatable includes a cylinder block. The cylinder block includes a cylinder and a crank chamber which are arranged in an up/down direction, the crank chamber being positioned below the cylinder. An internal peripheral face of the cylinder block has a ventilation port that connects to a ventilation passage that connects an internal space of the crank chamber with an external space out of the cylinder block, and that is open. The ventilation port is placed above a center in the up/down direction in the crank chamber.

The invention provides a combustion engine comprising at least one combustion chamber, preferably several combustion chambers (1), wherein to each combustion chamber a piston (2) moving within a cylinder (3), a cylinder head (4) comprising at least one admission valve (5), at least one outlet valve (6), at least one spark plug (7) an intake port (13) and a throttle (8) controlling the engine load, is assigned. The combustion chamber (1) comprises a secondary injector means (14) for injecting a secondary fuel directly into the combustion chamber (1) in the direction of the spark plug (7) and secondary fuel supply means (15) for supplying a gas as a secondary fuel to said secondary injector means (14). Supply means (16) for compressed air and mixture means for providing a mixture of air and gas fuel to said secondary injector means (14), facilitating the stoichiometric air-to-fuel ratio to be held at =1.

A controller configured to control a gas mixing device and/or a port injection valve and a direct fuel injector of an internal combustion engine in order to: in a first operation mode, supply a first gaseous fuel to at least one main combustion chamber of the internal combustion engine via at least one intake valve, in a second operation mode, supply a second gaseous fuel to the at least one main combustion chamber of the internal combustion engine by use of the direct fuel injector, wherein a supply system for providing flushing gas to the direct fuel injector is provided and the controller is configured to activate the direct fuel injector during operation according to the first operation mode, such that the flushing gas is injected into the at least one main combustion chamber.

An engine controller, for an internal combustion engine, is configured to: control at least one actuator to provide an air-fuel mixture with a lambda value higher than 3 to a main combustion chamber via at least one intake valve, wherein the at least one actuator is arranged upstream of at least one intake port or which is arranged in the intake port; control at least one fuel supply system to provide fuel directly to the main combustion chamber and/or a pre-combustion chamber of a piston-cylinder unit such that at the time of ignition of the air-fuel mixture the lambda value of that air-fuel mixture in the main combustion chamber is lower than the lambda value of the air-fuel mixture provided to the main combustion chamber via the at least one intake valve.

An ammonia engine system includes a combustor configured to generate combustion gas by burning ammonia mixed with air, a reforming catalyst configured to be warmed up by the combustion gas, an ammonia engine configured to be supplied with hydrogen that is discharged from the reforming catalyst, and a controller. The controller is configured to, during startup of the ammonia engine, execute a combustion process that causes the combustor to generate the combustion gas and a supplying process that supplies the reforming catalyst with ammonia together with air. The controller is configured to initiate the supplying process after the combustion process has begun.