A device for injecting water in a vehicle includes a water container which is connected to a number of injection nozzles via a supply line, with a pumping operation for pumping water from the water container to the injection nozzles via the supply line and with a stationary operation in which the supply line is a closed line system. The supply line is equipped with a blocking device which is open in the pumping operation and which is closed in the stationary operation in order to block the supply line and keep same dry. Water is prevented from being suctioned into the supply line and the injection nozzles at low temperatures as a result of a pressure decrease.

Internal combustion engine having: a cylinder defining a combustion chamber; an exhaust duct that is flown through by the exhaust gases; and a system to supply a water-based operator liquid to the combustion chamber having: a tank designed to contain a certain amount of water-based operator liquid and a heating device designed to heat the water-based operator liquid contained in the tank. The heating device has: a first gas-liquid heat exchanger, which is designed to be flown through by at least part of the exhaust gases flowing along the exhaust duct; a second liquid-liquid heat exchanger, which is designed to heat the water-based operator liquid contained in the tank; and a hydraulic circuit, which is designed to send round an exchange fluid through the first heat exchanger to transfer the heat from the exhaust gases to the exchange fluid and through the second heat exchanger to transfer the heat from the exchange fluid to the water-based operator liquid contained in the tank.

A device supplies water into a high-pressure fuel pump of a motor vehicle internal combustion engine, wherein the water is admixed to the fuel in the inlet region of the high-pressure fuel pump in a controlled manner by a metering valve, and wherein the device is designed to guide the water at least from a part of a supply line back to the storage container. When viewed in the flow direction from the storage container to the high-pressure fuel pump, a shut-off valve is provided in the supply line upstream of the metering valve, and the supply line is designed to elastically deformably change its volume in a line section positioned between the valves. In an operating method, wherein, after the parking of the motor vehicle in conditions that make it possible for the liquid that is at risk of freezing to freeze, and/or after delivery of the liquid to the high-pressure fuel pump, and with a suitably adjusted upstream fluid pressure, the metering valve is opened and remains open until a portion of the fluid in the section of the supply line leading from the metering valve to the high-pressure fuel pump flows out through the metering valve.

A control device is provided for a cooling liquid injection system for an internal combustion engine of a motor vehicle. The cooling liquid injection system includes at least two activatable injectors for introducing a cooling liquid into the internal combustion engine, which injectors can be controlled by the control device. The injectors can be supplied with cooling liquid by way of a common rail, and the control device is designed to receive an inclination variable, which characterizes an inclination of the rail, to determine an activation response for the injectors in dependence on the inclination variable, and to activate the injectors using the determined activation response in order to empty or fill the rail.

A sparked reciprocating internal combustion two-stroke steam engine including an engine casing, a crankshaft rotatable about a crankshaft axis, a cylinder arranged inside the engine casing, a piston 1 arranged inside the cylinder to movably reciprocate along a reciprocating axis between a top dead center position distal from the crankshaft and a bottom dead center position proximal to the crankshaft and operatively connected to the crankshaft such that the reciprocating piston imparts a rotational movement to the crankshaft, a combustion chamber defined within the cylinder between the engine casing and a head of the piston opposite the crankshaft, an intake valve, an exhaust valve, a fuel injector to directly inject fuel into the combustion chamber, a water injector to directly inject water into the combustion chamber at a location below the top dead center position of the piston, and a spark plug, where the intake valve is in fluid connection with a compressed gaseous oxidizer supply configured to feed compressed gaseous oxidizer through the intake valve to the combustion chamber.

For an optimized metering of fuel and water for the operation of an internal combustion engine in which a direct injection and an intake manifold injection are provided for metering fuel into the internal combustion engine, and in which the internal combustion engine is assigned a system for water injection, a same intake manifold injector is used for both water and fuel injection.

A water injection device for an internal combustion engine includes at least one water tank for storing water, at least one water injector for injecting water into the engine, at least one conveyor module including a conveyor element for conveying water from the water tank into the water injector, at least one first connection, at least one second connection, and at least one third connection. The first connection is configured on the conveyor module which is connected to the water tank by at least one first line. The second connection is configured on the conveyor module which is connected by at least one second line to the water injector. The third connection is configured on the conveyor module which is connected to the water tank by at least one return line. The conveyor module includes at least one heating device for heating water flowing through the conveyor module.

A method and device for water injection, wherein a water injector (104) is activated in accordance with an activation (200) to open at a first time (t1) and to close at a second time (t2), wherein a water pressure profile (300) is measured and a change in the water pressure profile (400) is determined on the basis of the water pressure profile (300), wherein, depending on the water pressure profile (300) and on the change in the water pressure profile (400), it is determined whether the water injector (104) has been opened as a result of the activation (200), and/or wherein, depending on the water pressure profile (300) and on the change in the water pressure profile (400), it is determined whether the water injection (104) has been closed as a result of the activation (200).

Injection method and system for the injection of water in an internal combustion engine; the following steps are substantially comprised: operating, when the internal combustion engine is turned on, a reversible pump in order to suck water from a tank and feed the water under pressure to an injector through a feeding duct; cyclically opening, when the internal combustion engine is turned on, the injector in order to inject the water towards at least one cylinder of the internal combustion engine; and draining the water, when the internal combustion engine is turned off, from the injector and the feeding duct by using a release valve connecting the feeding duct to the outside.

A method for controlling an engine system, may include a water injection operation of injecting water into an intake system of an engine through a water injector of a water injection system in a first operating condition of the engine in which water injection is required, a compressed air injection operation of injecting compressed air into the intake system through a purge circuit of the water injection system in a second operating condition of the engine in which compressed air injection is required, and a water injection stop operation of stopping the water injection of the water injection system in a third operating condition of the engine in which water injection stop is required.