An injector (1) for injecting fuel and an additional fluid, is provided in that the injector (1) is designed for optimal space-saving yet exhibiting a simple construction. This construction results in a precise injection of a fuel and an additional fluid into a combustion chamber of an internal combustion engine. The arrangement has two solenoid valves, the first valve (2) and the second valve (3). The second solenoid valve (3) has a second nozzle needle (9) which is arranged in the injector (1), and the first nozzle needle (7) of the first solenoid valve (2) and the second nozzle needle (9) of the second solenoid valve (3) are arranged one behind the other on a longitudinal axis (10) of the injector (1). Further, the nozzle needles (7, 9) can be controlled independently of one another.

An internal combustion engine having an exhaust duct through which pass exhaust gases; and a water-based operating liquid system which includes a tank, and a heating device, which is coupled to the tank and is designed to heat water-based operating liquid. The heating device includes a heating chamber having an inlet opening designed to receive ambient air and that allows heat to be transferred from the walls of the exhaust duct to the air received from the environment and comprises an outlet opening for the heated air; and a heat exchanger, which receives the heated air and is thermally coupled to the tank so as to release part of the heat of the heated air to the water-based operating liquid contained in the tank.

An internal combustion engine having an exhaust duct through which pass exhaust gases; and a water-based operating liquid system which includes a tank, and a heating device, which is coupled to the tank and is designed to heat water-based operating liquid. The heating device includes a heating chamber having an inlet opening designed to receive ambient air and that allows heat to be transferred from the walls of the exhaust duct to the air received from the environment and comprises an outlet opening for the heated air; and a heat exchanger, which receives the heated air and is thermally coupled to the tank so as to release part of the heat of the heated air to the water-based operating liquid contained in the tank.

An engine system includes a combustion chamber including a cylinder formed in an engine and a piston configured to reciprocate inside the cylinder, a spark plug disposed in a ceiling part of the combustion chamber, and a water injection device configured to inject water into the combustion chamber through a plurality of nozzle holes facing the inside of the combustion chamber. The piston has a cavity in an upper surface thereof. The water injection device injects water into the cavity in a compression stroke at a timing when an extension of axes of at least some of the nozzle holes intersects the cavity. The cavity has a bottom part where the water injected by the water injection device collides, and a raising part configured to raise the water spreading along the bottom part toward the water injection device.

An engine system includes a combustion chamber including a cylinder formed in an engine and a piston configured to reciprocate inside the cylinder, a spark plug disposed in a ceiling part of the combustion chamber, and a water injection device configured to inject water into the combustion chamber through a plurality of nozzle holes facing the inside of the combustion chamber. The piston has a cavity in an upper surface thereof. The water injection device injects water into the cavity in a compression stroke at a timing when an extension of axes of at least some of the nozzle holes intersects the cavity. The cavity has a bottom part where the water injected by the water injection device collides, and a raising part configured to raise the water spreading along the bottom part toward the water injection device.

An engine system is provided, which includes an engine configured to generate a motive force for a vehicle by combusting a mixture gas of fuel and intake air, a water injector configured to inject heated water into a combustion chamber of the engine, and a controller configured to control the water injector to inject the water into the combustion chamber during an expansion stroke of the engine. The controller acquires a demanded engine load of the engine, and controls the water injector to increase an amount of water injection when the demanded engine load is within a first-load range, compared to when the demanded engine load is within a second-load range where the engine load is higher than in the first-load range.

An engine system is provided, which includes an engine configured to generate a motive force for a vehicle by combusting a mixture gas of fuel and intake air, a water injector configured to inject heated water into a combustion chamber of the engine, and a controller configured to control the water injector to inject the water into the combustion chamber during an expansion stroke of the engine. The controller acquires a demanded engine load of the engine, and controls the water injector to increase an amount of water injection when the demanded engine load is within a first-load range, compared to when the demanded engine load is within a second-load range where the engine load is higher than in the first-load range.

An engine system is provided, which includes an engine configured to generate a motive force for a vehicle by combusting a mixture gas of fuel and intake air, a water injector configured to inject heated water into a combustion chamber of the engine, and a controller configured to control the water injector to inject the water into the combustion chamber during an expansion stroke of the engine. The controller acquires a demanded engine load of the engine, and controls the water injector to retard a start timing of the water injection when the demanded engine load is within a first-load range, compared to when the demanded engine load is within a second-load range where the engine load is lower than in the first-load range.

An engine system is provided, which includes an engine configured to generate a motive force for a vehicle by combusting a mixture gas of fuel and intake air, a water injector configured to inject heated water into a combustion chamber of the engine, and a controller configured to control the water injector to inject the water into the combustion chamber during an expansion stroke of the engine. The controller acquires a demanded engine load of the engine, and controls the water injector to retard a start timing of the water injection when the demanded engine load is within a first-load range, compared to when the demanded engine load is within a second-load range where the engine load is lower than in the first-load range.

The present subject matter provides a device and a method for injecting non-combustible fluid into an internal combustion. In order to reduce the non-combustible fluid consumption, the fluid to be injected is heated to a predefined temperature which improves the spray characteristics, reduces wall wetting and leads to a better vaporization of the fluid in the combustion chamber.