A device for supplying a liquid at risk of freezing to the combustion chambers of an internal combustion engine, in particular an internal combustion engine driving a motor vehicle, is designed to convey the liquid at risk of freezing at least from a section of a supply line, through which the liquid travels from a storage container to a supply unit to the internal combustion engine, back to the storage container. In addition, an aeration valve is provided near to the supply unit and branching off from the supply line, via which the supply line is connected to the environment in the open state. When viewed in the direction of the storage container, downstream of the aeration valve, an air separation/pressure reservoir structural unit connected to the supply line is provided, which is designed to at least proportionally discharge air content out of the supply line and out of the liquid located in the supply line in a section positioned at the top in the mounted state, and to act as a pressure reservoir acting on the liquid in the supply line.

A device for supplying a liquid at risk of freezing to the combustion chambers of an internal combustion engine, in particular an internal combustion engine driving a motor vehicle, is designed to convey the liquid at risk of freezing at least from a section of a supply line, through which the liquid travels from a storage container to a supply unit to the internal combustion engine, back to the storage container. In addition, an aeration valve is provided near to the supply unit and branching off from the supply line, via which the supply line is connected to the environment in the open state. When viewed in the direction of the storage container, downstream of the aeration valve, an air separation/pressure reservoir structural unit connected to the supply line is provided, which is designed to at least proportionally discharge air content out of the supply line and out of the liquid located in the supply line in a section positioned at the top in the mounted state, and to act as a pressure reservoir acting on the liquid in the supply line.

The invention relates to an arrangement (100) having a liquid tank (10), at least one line (11, 11a, 11b) connected to the liquid tank (10), through which liquid (F) can be transported from the liquid tank (10), and a pump (13) connected to the at least one line (11, 11a, 11b) for conveying the liquid (F) from the liquid tank (10) through the at least one line (11, 11a, 11b) in the direction of flow (R) during an operating phase, wherein a pressure accumulator (14) connected to the at least one line (11, 11a, 11b) is provided, by means of which a pressure can be generated in the at least one line (11, 11a, 11b) outside of the operating phase, and a ventilating element (15, 15a, 15b), which can be transitioned into an open position and into a closed position, is arranged along the at least one line (11, 11a, 11b), wherein, outside of the operating phase, a pressure impulse within the at least one line (11, 11a, 11b) can be generated by the pressure generated by the pressure accumulator (14) and a subsequent transition of the ventilating element (15, 15a, 15b) into the open position in order to drain the line (11, 11a, 11b) of the fluid (F).

A method prevents icing of an injection system of an internal combustion engine of a motor vehicle having a high-pressure fuel pump to which, in addition to fuel, water can also be supplied via a feed line. When the motor vehicle is stopped, water still located in a wide region of the feed line is extracted, at least if required. For this purpose, a conveying device provided for conveying water to the high-pressure fuel pump is operated with the direction of rotation reversed. When the motor vehicle or the internal combustion engine is re-started, that region of the feed line from which water located therein has previously been extracted is flushed with water, the air located therein beings discharged into the surroundings.

A method prevents icing of an injection system of an internal combustion engine of a motor vehicle having a high-pressure fuel pump to which, in addition to fuel, water can also be supplied via a feed line. When the motor vehicle is stopped, water still located in a wide region of the feed line is extracted, at least if required. For this purpose, a conveying device provided for conveying water to the high-pressure fuel pump is operated with the direction of rotation reversed. When the motor vehicle or the internal combustion engine is re-started, that region of the feed line from which water located therein has previously been extracted is flushed with water, the air located therein beings discharged into the surroundings.

A water injection device is provided for a vehicle internal combustion engine having a storage tank for water and a conveying device which is connected to water and can convey water through a feed line into at least one injection valve which is assigned to the internal combustion engine and if required, in the case of a switched-off internal combustion engine, can convey it from the injection valve back in the direction of the storage tank. A device for separating air from the water which is conveyed back is provided in the feed line. The device for separating air is configured in the form of a container, in the upper interior region of which the at least one or more feed lines opens/open, whereas a forward feed line which is connected to the conveying device opens into the lower interior region of the container, and wherein, as viewed in the vertical direction, the upper interior region of the container is spaced apart further from a roadway, on which the vehicle is standing, than the lower interior region.

Provided is a control device for an internal combustion engine, which can control an injection amount of water injected into each cylinder of the internal combustion engine to a minimum injection amount that allows knock to be suppressed for each cylinder. Therefore, in a control device 1 that controls water supply valves 35 (water supply devices) that supply water into each of combustion chambers of a plurality of cylinders R (cylinders R1 to R3 in the embodiment) of an internal combustion engine 100, the control device 1 includes a water supply amount calculation unit 2 that calculates a supply amount of water supplied to each of the combustion chambers of the plurality of cylinders R1 to R3 for each cylinder, and a water supply control unit 3 that controls the water supply valves 35 based on the supply amount of water calculated by the water supply amount calculation unit 2 for each cylinder.

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.

An internal combustion engine inducts no air from outside atmosphere and it discharges no gas into outside environment. The engine receives hydrocarbon fuel and oxygen, and its combustion gas consists mostly of carbon dioxide and water vapor. Carbon dioxide is captured, stored and subsequently sequestered by using it with water to create a hydrocarbon fuel that can be supplied back to the engine. In that way, the engine fuel is repeatedly regenerated and reused, and the engine operates in a carbon neutral mode of operation. Some of the combustion gas is used as a diluent gas in the engine. High specific heat and high density of that gas permit operation in high-efficiency overexpanded cycle without an increase in the engine size. Various methods of the engine control and operation are described, including methods to reduce pumping loss. Various modes of in-cylinder diluent gas formation are considered.

Provided is a control device for an internal combustion engine, which can control an injection amount of water injected into each cylinder of the internal combustion engine to a minimum injection amount that allows knock to be suppressed for each cylinder. Therefore, in a control device 1 that controls water supply valves 35 (water supply devices) that supply water into each of combustion chambers of a plurality of cylinders R (cylinders R1 to R3 in the embodiment) of an internal combustion engine 100, the control device 1 includes a water supply amount calculation unit 2 that calculates a supply amount of water supplied to each of the combustion chambers of the plurality of cylinders R1 to R3 for each cylinder, and a water supply control unit 3 that controls the water supply valves 35 based on the supply amount of water calculated by the water supply amount calculation unit 2 for each cylinder.