A method of controlling water injection in an internal combustion engine for a motor vehicle in case of freezing cold weather. The method includes: controlling the quality of the water, having a first sub-step of disapproving the quality of the water if the electrical conductivity σ of the water is not zero nor close to zero when the temperature T of the water is 0° C. or less and a second sub-step of approving the quality of the water if the electrical conductivity σ of the water is zero or close to zero when the temperature T of the water is higher than −4° C., preferably higher than −2° C. The method further includes a second sub-step of preventing water injection if the quality of the water is disapproved and a third step of allowing water injection if the quality of the water is approved.

The present invention relates to a vehicle system (80) configured for injecting an aqueous solution in an air intake line (12) upstream of a combustion chamber (14) of an internal combustion engine, or in the combustion chamber (14) of the internal combustion engine, said vehicle system (80) comprising the following constituents: ⋅a tank (16) to store an aqueous solution; ⋅a pump (18); ⋅an air intake line (12) upstream of a combustion chamber (14) of an internal combustion engine; ⋅one or more injectors (20) configured for injecting aqueous solution in the air intake line (12), in the combustion chamber (14) or both; ⋅a feed line (22) configured in for feeding said injector (20) with aqueous solution pumped by the pump (18). In the vehicle system, at least a portion of at least one of the vehicle system constituents (16, 18, 12, 20, 22) or of a tank (16) component (24) is made of a polymer material. The polymer material—comprises an effective amount of at least one antimicrobial agent, or—has on its surface a surface coating containing at least one antimicrobial agent, the surface coating comprising between 0.001% by weight and 0.25% by weight of the at least one antimicrobial agent.

A method for determining an air mass in an air separator of a water direct injection system for injecting a water/fuel mixture into a combustion chamber of an engine of a motor vehicle. The air separator is disposed between a water pump for delivering water of the water/fuel mixture and a high-pressure pump for feeding the water/fuel mixture to a high-pressure injector for injecting the water/fuel mixture into the combustion chamber. The method includes increasing a pressure of the water from a first pressure value to a second pressure value by the water pump, determining a water volume delivered by the water pump during the increasing of the pressure of the water by the water pump, and determining the air mass in the air separator on a basis of the determined water volume delivered by the water pump.

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 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.

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.

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.

An exchangeable filter of a treatment device has a housing with a housing pot and a housing cover connected to the open side of the housing pot. The exchangeable filter is connectable to a connecting head of the treatment device with a bayonet-type connecting device. The connecting device has a housing connecting part on the housing interacting with a head connecting part of the connecting head for connecting the connecting device. The housing has an inlet for a fluid to be treated connectable to a supply conduit of the treatment head and an outlet for the treated fluid connectable to a discharge conduit of the treatment head. The housing pot has a rim at the open side of the housing pot. The rim radially outwardly surrounds the housing connecting part and axially projects past the housing connecting part in a direction away from the housing bottom.