Abstract: In a fuel supply system for an internal combustion engine including a fuel tank, a fuel processing apparatus to which fuel from the tank is supplied and which separates the fuel into different fractions, the fuel and the fractions are mixed in a mixing chamber according to a performance graph stored in a control unit depending on the operating state of the engine and the mixture is then supplied to the engine in a controlled manner.

Abstract: In a fuel fractionation device for separating a low-boiling fuel fraction from a liquid fuel of an internal-combustion engine, including a vessel which contains the liquid fuel, and in which a reduced pressure is generated by withdrawing the low-boiling fuel fraction in vapor form from the vessel and making it available to the internal combustion engine, the efficiency of the fractionation is improved by utilizing a carrier-gas which is introduced into the liquid fuel, and which is withdrawn from the vessel together with the fuel fraction vapor.

Abstract: An injection valve for internal combustion engines has a filter element arranged on the inside of the injection valve in the fuel flow of the latter with ducts for the fuel. The filter element is designed as a throughflow heating element, for which purposes the walls of the throughflow ducts are capable of being heated, at least in certain regions, along their longitudinal extent.

Abstract: An internal combustion engine having one injection valve (3) per cylinder and at least one additional port injector (5) for injecting fuel into combustion air which is fed to the cylinders (2) in the intake tract (4). The port injector (5) havs two supply inlets (10, 11) which can be closed off. A control unit (8) determines the quantity of fuel which is to be delivered as a function of the operating state of the internal combustion engine (1). Separately provided starting fuel is delivered by the port injector (5) during the warm-up phase of the internal combustion engine.

Abstract: In a fuel supply system for an internal combustion engine having a fuel tank for liquid fuel, a fuel pump which draws fuel from the fuel tank and pressurized the fuel to an injection pressure at which the fuel is made available to the internal combustion engine, a fuel-fractionating device which produces at least one liquid fuel fraction from the fuel, and an accumulator which receives the liquid fuel fraction from the fuel-fractionating device, stores it and makes it available to the internal combustion engine, the fuel fraction made available and the fuel made available being fed to the internal combustion engine by the fuel supply system as a function of demand, the accumulator is a pressure accumulator and includes pressure-generating means for pressurizing fuel fraction in the pressure accumulator to the injection pressure.

Abstract: A device for liquefying fuel fractions which are in vapour form in fuel tanks (1), having a suction device (10), a pump (13), a condensation device (16) and a separation and storage device (18). This device has a regulation means, with the aid of which the fraction-air mixture (31), which is displaced by the fuel (30), flowing in during the refuelling of the fuel tank (1) and/or a fraction-air mixture (31) which is produced by air injection by means of an air-injection device (23) can be sucked out and separated.

Abstract: An internal combustion engine has a preparation device for fuel, for the purpose of providing a starting fuel which comprises low-boiling fuel constituents. A catalytic converter is accommodated in an exhaust train of the internal combustion engine. After-treatment of the exhaust gases is carried out by a secondary air device, by means of which secondary air is blown into the exhaust train upstream of the catalytic converter, the combustion being carried out with an excess of starting fuel for rich-burn operation during the cold start and the subsequent warm-up phase. The system is provided for spark-ignition mixture-compressing or spark-ignition direct injection internal combustion engines.

Abstract: In a fuel supply system for an internal combustion engine including a fuel tank, a fuel processing apparatus to which fuel from the tank is supplied and which separates the fuel into different fractions, the fuel and the fractions are mixed in a mixing chamber according to a performance graph stored in a control unit depending on the operating state of the engine and the mixture is then supplied to the engine in a controlled manner.

Abstract: A flushable bi-fuel injector, in particular for combustion engines, comprises a nozzle body incorporating a nozzle exit (11), a movably held valve needle (12) for opening and closing the nozzle exit (11), a first supply channel (13) for supplying a first liquid or a first fuel to the nozzle exit (11); and a second supply channel (23) for supplying a second liquid or a second fuel or a liquid additive to the nozzle exit (11). A ring-shaped slide gate (21) or a ring piston is arranged in a ring-shaped chamber (20) within the nozzle body (1). The slide gate (21) can be hydraulically activated to either side via differential pressure. Depending on its position, the slide gate (21) connects either the first supply channel (13) or the second supply channel (23) to the nozzle exit (11).

Abstract: In a fuel fractionation device for separating a low-boiling fuel fraction from a liquid fuel of an internal-combustion engine, including a vessel which contains the liquid fuel, and in which a reduced pressure is generated by withdrawing the low-boiling fuel fraction in vapor form from the vessel and making it available to the internal combustion engine, the efficiency of the fractionation is improved by utilizing a carrier-gas which is introduced into the liquid fuel, and which is withdrawn from the vessel together with the fuel fraction vapor.

Abstract: In a fuel supply system for an internal combustion engine having a fuel tank for liquid fuel, a fuel pump which draws fuel from the fuel tank and pressurized the fuel to an injection pressure at which the fuel is made available to the internal combustion engine, a fuel-fractionating device which produces at least one liquid fuel fraction from the fuel, and an accumulator which receives the liquid fuel fraction from the fuel-fractionating device, stores it and makes it available to the internal combustion engine, the fuel fraction made available and the fuel made available being fed to the internal combustion engine by the fuel supply system as a function of demand, the accumulator is a pressure accumulator and includes pressure-generating means for pressurizing fuel fraction in the pressure accumulator to the injection pressure.

Abstract: A flushable bi-fuel injector, in particular for combustion engines, comprises a nozzle body incorporating a nozzle exit (11), a movably held valve needle (12) for opening and closing the nozzle exit (11), a first supply channel (13) for supplying a first liquid or a first fuel to the nozzle exit (11); and a second supply channel (23) for supplying a second liquid or a second fuel or a liquid additive to the nozzle exit (11). A ring-shaped slide gate (21) or a ring piston is arranged in a ring-shaped chamber (20) within the nozzle body (1). The slide gate (21) can be hydraulically activated to either side via differential pressure. Depending on its position, the slide gate (21) connects either the first supply channel (13) or the second supply channel (23) to the nozzle exit (11).

Abstract: An injection valve for internal combustion engines has a filter element arranged on the inside of the injection valve in the fuel flow of the latter with ducts for the fuel. The filter element is designed as a throughflow heating element, for which purposes the walls of the throughflow ducts are capable of being heated, at least in certain regions, along their longitudinal extent.

Abstract: A fuel supply system for an internal combustion engine is provided with a fuel tank for liquid fuel, from which a fuel supply line leads to a fuel injection device, and an evaporating and condensing device for low-boiling fuel components, connected to the fuel tank. Also provided is an intermediary tank connected downstream from the evaporating and condensing device, for condensate, from which tank a condensate line leads to a control valve that regulates supply to the injection device. A residual fuel line for the high-boiling fuel produced in the evaporating and condensing device ends in an additional tank, from which a residual fuel supply line runs to a reversing valve mounted in the fuel supply line. The reversing valve is controlled so that the high-boiling fuel is supplied from the residual fuel supply line into the fuel supply line going to an injection device of the engine.

Abstract: A method operates an improved internal combustion engine by heating the fuel before entry into the cylinder, at least during the cold-start phase of the engine. In order to undertake the heating step in a favorable way, at least areas in the region of an intake valve are irradiated with an electromagnetic radiation of radiation source, and thereby heated without contact. As a result, liquid fuel in the valve region is heated by contact with the areas of the valve region, and condensation of the fuel is at least reduced.