SE1050202A1 - Device, procedure, computer program and control for operation of an internal combustion engine - Google Patents

Description

the internal combustion engine. To improve the combustion conditions of the fuel in the combustion chamber, a catalyst may be provided in the combustion chamber, for example platinum. The catalyst reduces the unkt point of the fuel and thus improves the ignition and maintenance of the combustion.

To ignite the combustion in the combustion chamber, for example, a part of a catalyst device, at the surface of which the catalyst is arranged, can be heated. In the following, embodiments of the invention are explained by means of the accompanying drawings, of which: Fig. 1 shows a schematic view of a device for heating fuel and a control for the device; Fig. 2 shows a schematic view of a device for heating fuel and a control for the device; Fig. 3 shows a schematic view of an internal combustion engine with a device for heating fuel and a control; and Fig. 4 shows a schematic fl circuit diagram of a method for heating fuel for an internal combustion engine.

Fig. 1 shows a schematic view of an intake 10 of an internal combustion engine not shown in Fig. 1 with a device 20 for heating fuel. The device comprises a combustion chamber 21, which is substantially bounded by a wall 22 and a partially permeable component 23. The partially permeable component immediately adjoins the cavity 11 of the intake 10 and forms an outlet of the combustion chamber 21 to the cavity 11 of the intake 10. In particular, at least one part of the combustion chamber 21 into the cavity 11 of the intake 10, so that the partially permeable component 23 is arranged in a central area of the cross section of the intake.

The partially permeable component 23 provides a pressure gradient between the combustion chamber 21 of the device 20 and the cavity 11 of the intake 10. This pressure gradient causes only fuel heated in the combustion chamber 21 to pass from the combustion chamber 21 into the cavity 11 of the intake 10, but no oxidizing agent from the intake 10 cavity 10. into the combustion chamber 21. The partially permeable component has, for example, an open-pore foam, a fabric, a cloth, a net or another porous or microporous element with a number of regularly or irregularly arranged openings or pores. The partially permeable component 23 has, for example, copper, aluminum, another metal or ceramic.

When the internal combustion engine is a piston machine with its cylinders, the area of the intake 10 shown in Fig. 1, at the device 20, is, for example, an area to which all the cylinders are arranged. Such an area arranged for all cylinders is an area through which air or another oxidizing agent flows to all cylinders. Alternatively, the device 20 may be arranged in or in an area of the intake 10, through which air or another oxidizing agent flows only to a cylinder or other part of the cylinder of the internal combustion engine. In this case, your devices of the type of device 20 shown in Fig. 1 may be arranged at the internal combustion engine. This plurality of devices can be arranged so that in each cylinder air or another oxidizing agent can flow, which is bypassed at one of the devices.

The combustion chamber 21 has a first inlet, at which a first valve 30 for supplying fuel into the combustion chamber 21 can be arranged. The first valve 30 comprises a valve housing 31 with an opening 32 to the combustion chamber 21. The opening 32 of the valve housing 31 can be closed by a movable valve means 33. A coil drive means 34 is designed to move the valve means between a closed position in which it closes the opening 32 , and an open position, in which it opens the opening. The first valve 30 further has an inlet 36, which can be connected to the fuel line (not shown in Fig. 1), through which the first valve 30 can be supplied with fuel. The combustion chamber 21 further has a second inlet, at which a second valve 40 for supplying air or another oxidizing agent in the combustion chamber 21 is arranged. The second valve 40 comprises a valve housing 41 with opening 42 to the combustion chamber 21. A movable valve member 43 is movable through a flush drive member 44 between a closed position, in which it closes the opening 42, and an open position, in which it opens the opening 42. Further the second valve 40 has an inlet 46, over which the second valve 40 can be supplied with air or another oxidizing agent.

Both the first valve means 33 and its flush drive means, as well as the second valve means 43 and its flush drive means can be designed, in order to be able to assume any position between the closed and the open position. In this case, the fate resistance and the amount of fuel or air flowing at a certain pressure difference can be set continuously. The first valve and its coil drive means as well as the second valve 40 and its coil drive means can alternatively be designed to be predominantly either closed or open. A medium fuel or air flow through the first or second valve 30, 40 can in this case be set depending on the button position or the time required, so that the valve 30, 40 is closed and the time required, where the valve is open. In the combustion chamber 21 a catalyst device 51 is arranged, at the surface of which a catalyst is arranged, which reduces the point or temperature at which the present fuel is combusted with the present oxidizing agent. An example of the catalyst is platinum. One catalyst is platinum Pt. The catalyst device 51 comprises, for example, a net, a fabric, a cloth or a sheet of metal, ceramic or another material with a smooth or structured surface.

The catalyst device 51 has, for example, the shape of a sphere or a tube with a circular or square cross-section.

At the catalyst device 51, a heating device 52 is provided by means of which at least a part of the surface of the catalyst device 51 can be heated to a temperature at or above the fl point of the present fuel and the present oxidizing agent can be heated. In the embodiment shown in Fig. 1, the heating device 52 is arranged within the catalyst device near its surface in an area facing the first valve 30.

The heater 52 includes, for example, a NTC (Negative Temperature Coefficient) resistor or another electrical resistor or coil for inductive heating of the catalyst device. Alternatively, the heating device is integrated in the catalyst device. For example, the catalyst device may be arranged as an individual part or a part thereof in a circuit, in order to heat it resistively.

An injection cone 39 of the first valve 30 characterizes a chamber area, in which the first valve 30 can spray fuel in the form of a divided spray jet or in the form of a drop. An injection cone 49 of the second valve 40 characterizes a chamber area in which the second valve 40 can spray air or another oxidizing agent. The injection cones 39, 49 of the valves depend on the geometries of the openings 32, 42 and the valve actuator 33, 43. Both the injection cone 39 of the first valve and also the injection cone 49 of the second valve 40 are so selected in this embodiment that the catalyst device 51 is completely or almost completely arranged in the injection cone 39, 49. The injection cone 49 of the second valve 40 is in this embodiment selected so that the catalyst device 51 completely or substantially fills the injection cone 49.

A temperature sensor 61 is further arranged in the combustion chamber 21, for example a temperature-dependent electrical resistor or a thermocouple. In the embodiment shown in Fig. 1, the temperature sensor 61 is arranged at a side of the catalyst device 51 facing away from the first nozzle 30 and the second nozzle 40 and in particular between the catalyst device 51 and the partially permeable component 23.

The device 20 is connected to a control 70. A first output 71 of the control 70 is connected via a line 35 to the coil drive means 34 of the first valve 30. A second output 72 of the control 70 is connected via a line 45 to the coil drive means 44 of the second the valve 40. A third output 73 of the control 70 is connected via a line 55 to the heating device 52. An input 75 of the control 70 is connected via a line 65 to the temperature sensor 61. The control 70 may further have inputs and outputs, which are not shown. in Fig. 1, for receiving or transmitting information via corresponding signals or controlling or regulating further devices, which are not shown in Fig. 1.

Each of the wires 35, 45, 55, 65 comprises, for example, one or more single wires.

Wires 35 and 45 are each shown as pairs of single wires. Alternatively, each of the conduits 35, 45 comprises only a single conduit, in which the corresponding circuit is closed over a common mass, for example the engine block or the housing of the internal combustion engine. The same applies to the lines 55, 65, which connect the third output 73 or the input 75 of the control 70 to the heating device 52 or the temperature sensor 61. Depending on the design of the drive means 34, 44, the lines 35, 45, 55, 65 may comprise light waveguides or other signal conductors for transmission. of optical signals. The controller 70 is arranged to control the device 20. The logic or control characteristics of the controller are for example implemented in Hardware, Firmware or Software. For example, the device 20 and the guide 70 are designed to deliver expected fuel at certain predetermined operating positions of the internal combustion engine, in particular evaporated fuel in the cavity 11 of the intake 10. In addition, the control 70 controls the first valve 30 and the second valve 40 so that predetermined amounts of fuel and air or another oxidizing agent is mixed in the combustion chamber 21 and partially combusted with each other.

To start the combustion process, the controller 70 controls the heating device 52 so that at least a part of the surface of the catalyst device 51 is heated so far that the combustion begins there.

The control 70 controls the injected or blown amount of air or another oxidizing agent so that only a part of the fuel is burned in the well chamber 21 and the unburned fuel is heated above a predetermined temperature, for example to a temperature above its boiling point. The thus vaporized unburned fuel is discharged via the partially permeable component 23 into the cavity 11 of the intake 10. As the partially permeable component 23 exhibits a high thermal conductivity, it further improves its temperature homogeneity in the space of the fuel discharged into the cavity 11. Examples of methods for heating fuel, which are feasible by means of the device 20 and the control 70 shown according to Fig. 1, are explained in more detail in Fig. 4.

Fig. 2 is a schematic view of an intake 10 with a device 20 for heating fuel and a control 70 according to a further embodiment. A combustion chamber 21 comprising a wall 22 and a partially permeable component 23, a first valve 30 for supply, a valve 40 for supplying air or another oxidizing agent and a guide 70 are constructed and designed similarly or in the same manner as those of the above for the embodiment shown in connection with Fig. 1.

The embodiment shown in Fig. 2 differs from the embodiment shown above in connection with the embodiment shown in Fig. 1 mainly in the design and arrangement of the catalyst device 51 and the heating device 52. In the embodiment shown in Fig. 2, the catalyst device 51 is designed so and arranged so that air or another oxidizing agent enters through the second valve 40 into an inner chamber of the catalyst device 51.

The catalyst device 51 has a gas-permeable surface with a number of pores or openings, which are arranged regularly or irregularly. For example, the catalyst device 51 has a grid, a net, a fabric, a cloth or an open-pored foam of metal, ceramic or another sufficiently temperature-stable material. At least at an outer surface of the catalyst device 51 is similar to the one above in connection with Figs. 1, the embodiments show a catalyst arranged. Air or another oxidizing agent is passed through the second valve 40 into the catalyst device 51 and is combusted at its outer surface with a portion of the fuel which is passed through the first valve 30 into the combustion chamber 21.

To start the combustion in the combustion chamber 21, at least a part of the outer surface of the catalyst device 51 is heated by the heating device 52. In this embodiment, the heating device 52 comprises a source of heat radiation 54, for example a light emitting diode or a laser diode emitting infrared or other electromagnetic radiation. The heat radiation 54 may be collected in a beam through a lens in a certain area of the surface of the catalyst device 51. In order to reduce a scattering or absorption of the heat radiation 54 in a fuel mist obtained from the first valve 30, a suitable wavelength of the heat radiation 54 can be selected which is not at all or only negligibly absorbed by the fuel mist. Alternatively or in addition, the first valve 30 and the heating device 52 are clocked alternately or fuel is only sprayed after the desired surface temperature of the catalyst device 51 has been reached.

The catalyst device shown in connection with Fig. 1 is compatible with the heating device shown in Fig. 2. Likewise, the catalyst device shown in Fig. 2 is compatible with the protection device shown in Figs. The devices shown above as shown in Fig. 1 and Fig. 2, respectively, outlets instead of a partially permeable component with a large surface can also be designed with one or more nozzles. This nozzle or these nozzles are then for instance arranged in a central area of the cross section of the cavity 11 of the suction 10.

Fig. 3 shows a schematic view of an internal combustion engine 12 with a device 20 and a control 70, as shown above in connection with the devices Figs. 1 and Fig. 2. The devices 20 and the respective associated control 70 are suitable for all types of oxidizing agents and fuels.

Also described as an example in Fig. 3 is an embodiment of the internal combustion engine 12 as a piston machine. Air is described as an oxidizing agent. Alternatively, other oxidizing agents are also useful.

The internal combustion engine 12 has an intake 10 with a cavity 11, for feeding each cylinder 13 of the internal combustion engine 12. Immediately before one or two inlet valves of each cylinder 13, an injection valve 14 is provided for injecting fuel into an air stream for filling the cylinder 13. Alternatively, the injection valves 14 are arranged in the cylinders 13. The injection valves 14 are connected to a fuel pump 16, which supplies fuel to the injection valves 14 from the fuel tank (not shown) to the injection valves 14.

The arrangement of your injection valves, also referred to as Multi-Point injection.

Alternatively, a single-point injection system is provided so that from this injected fuel of a single injector can end up in each cylinder.

A damper 17 is controlled by a drive means 18 and directs a supply of fresh air from an air filter 19 into the intake 10 of the internal combustion engine 12. An outlet 74 of a control 79 is connected to the drive means 18 of the damper 17. The control 79 is a control for the internal combustion engine 12 , which in addition to the damper 17 can for instance also control the fuel pump 16, the injection valves 14, the inlet valves or the outlet valves at the cylinders 13 or whose control times or other setpoints can be controlled at the internal combustion engine 12. The control 70 already shown in connection with Fig. 1 and Fig. 2 may be connected to the control 79 of the internal combustion engine 12 (for example via control lines). Alternatively, the guide 70 and the control 79 are integrated.

A device 20, as shown in connection with Fig. 1 and Fig. 2, is arranged at the intake 10 between the damper 17 and the injection valves 14 so that the fuel heated by the device 20 can end up in all cylinders 13. It before supplying fuel to the combustion chamber of the first valve 30 provided with the device 20 is connected via a fuel line 15 to the fuel pump 16. The second valve 40 arranged before supply to the combustion chamber of the device 20 is connected via an air line 47 to a part of the suction between the air filter 19 and the damper 17. closed or partially closed damper 17, a pressure difference arises in this way, which enables the supply of air into the combustion chamber of the device 20 via a second valve 40, when it is opened.

In contrast to the embodiment in Fig. 3, the first valve 30 can receive fuel from another fuel source, for example from a suitable fuel pump. In contrast to the view shown in Fig. 3, the second valve 40 can further receive air from another device, for example from a separate air filter and / or via a separate air blower device. Above above, according to Figures 1 to 3, the respective first valve 30 and respectively, the second valve 40 is replaced by a respective pump or blower means for measuring fuel or oxidant to the combustion chamber of the device 20.

In all embodiments shown according to Figures 1 to 3, the control 70 can be designed such that via the measured amount of air the amount of fuel burned in the combustion chamber of the device 20 and the ratio of the fuel burned to the unburned fuel is set so that the temperature of the heated fuel has a predetermined value. In addition, the controller 70 has a corresponding controller implemented in Hardware, Firmware or Software, for example a PID controller. Alternatively, the device 20 comprises a thermostat which, depending on the temperature of the spent fuel at or near the outlet formed by the partially permeable component 23, controls the supply of air or another oxidizing agent to the combustion chamber 21.

Instead of two controllable valves 30, 40, each of the devices 20 shown above in connection with Figs. 1 to 3 can have only one controllable valve. According to a further alternative, both the fuel supply and also the supply of air or another oxidizing agent are controlled by a single actuator. Instead of the coil drive shown in Figures 1 and 2, other electric or non-electric drive means are also useful, for example servo drive means with a linear drive or a conventional rotary electric motor, ultrasonic motors, pneumatic drive means, etc.

Fig. 4 shows a schematic flow diagram of a method for heating fuel for an internal combustion engine, such as can be carried out, for example, by means of a device 20 shown according to Figures 1 to 3 and controlled, for example, by means of controls 70 shown in Figures 1 to 3. The method shown in Fig. 4 is feasible with other devices and is controlled by other controls, as can be seen from the description of the method in accordance with the reference numerals according to Figures 1 to 3, in order to facilitate understanding. The process can be carried out in particular when starting an internal combustion engine 12. The heated fuel reduces the condensation of the fuel at cold surfaces of the starting internal combustion engine and can thus improve the starting ratio of the internal combustion engine. However, the process can also be carried out in a modified form after starting the internal combustion engine, for example to increase the mechanical power obtained from the internal combustion engine.

In a first step 91, by means of a heating device 52 at least a part of a catalyst device 51 is heated or heated to a certain predetermined temperature. The predetermined temperature is, for example, at or above a fl point for the present mixture of fuel and oxidant. When the catalyst device 51 is arranged, the predetermined temperature is at or above the fl point in the presence of the catalyst at the surface of the catalyst device 51.

In a second stage 92, the internal combustion engine 12 is driven, for example, by an electric or pneumatic starter motor. This accelerates the internal combustion engine to a predetermined minimum speed. In a third step 93, the speed of the internal combustion engine is measured. This measurement takes place during operation of the internal combustion engine. As soon as the speed of the internal combustion engine has exceeded a threshold value, which is, for example, 180 rpm, in a fourth stage 94 fuel and air are led into a combustion chamber 21 of the device 20. In a fifth stage 95 a part of the initiated fuel is combusted with the initiated the air. In a sixth stage 96, the combustion of the heated unburned fuel is led into an intake 10 of the internal combustion engine 12. The fifth stage 95 and the sixth stage 96 may forcibly follow previous steps, in particular with the appropriate choice of predetermined threshold value of the speed, at appropriate selection of the amounts of fuel and air initiated in the combustion chamber 21 and, when appropriate selection of the predetermined temperature of the catalyst device 51 in a seventh step 97, a damper 17 is set to a certain opening.

The first stage 91, the second stage 92, the third stage 93, the fourth stage 94, the fifth stage 95, the sixth stage 96 and the seventh stage 97 can at least in part also be introduced in another sequence of steps. For example, depending on the heating effect of the heating device 52, it may be sufficient to first heat that part of the surface of the catalyst device 51 immediately before supplying fuel and air. Preferably, but not necessarily, the time at which the heated part of the catalyst device reaches the predetermined temperature falls, the time at which the combustion engine has reached the predetermined speed and the beginning of the supply of fuel and air together to the combustion chamber. To start the combustion of fuel with air in the combustion chamber 21, the fuel-air ratio in the combustion chamber 21 can be set so that at least the surface of the catalyst device 51 reaches the predetermined temperature as quickly as possible. This is the case, for example, with an A value for the combustion of 1, ie. a complete turnover of fuel and oxidizing agents.

In an eighth step 98, the temperature of the heated fuel is measured by means of a temperature sensor 61. In a ninth step 99, the combustion in the combustion chamber 21 is controlled depending on the measured temperature of the heated fuel, so that the heated fuel has a predetermined setpoint temperature. The eighth step 99 is preferably repeated periodically or continuously. In a tenth step 100, the combustion in the combustion chamber 21 of the device 20 is terminated. In addition, the supply of fuel and / or supply into the combustion chamber 21 is terminated. The combustion in the combustion chamber 21 is terminated when the internal combustion engine 12 or at least relevant areas of the internal combustion engine 12 have reached a certain temperature. . Alternatively, the combustion is terminated after a certain time has elapsed, after which it is ensured that at least relevant surface areas of the internal combustion engine 12 have reached the predetermined temperature. This can be the case with a piston machine, in which the temperature of the inlet side surface of the inlet valve of a cylinder is dominant, after a few seconds. The predetermined time can be set as a function of the ambient temperature or as a function of the temperature of the internal combustion engine. In the starting process described, the entire fuel present for combustion in the internal combustion engine as described above in connection with Fig. 4 can be preheated, before it is supplied via an intake to the internal combustion engine 12. Alternatively, only a part of the fuel present in the internal combustion engine for combustion is heated on the combustion engine. described method, while additional fuel is supplied to the internal combustion engine in other ways, for example via injection valves 14. After the end of the starting process, the amount of heated fuel can be reduced discontinuously or continuously, while other amounts of fuel supplied to the internal combustion engine 12 are increased in other ways.

The devices 20 described above in connection with Figs. 1 to 3 and at least a part of the method shown above in connection with Fig. 4 can also be used after a start of an internal combustion engine and even when the internal combustion engine has already reached its operating temperature, to supply the internal combustion engine 12 fuel. The total amount of fuel supplied to the internal combustion engine can thus be increased, for example to increase the power delivered from the internal combustion engine 12.

In this case, for example, by heating 91, a part of a catalyst device 51 in a combustion chamber 21 is heated to a certain temperature. Fuel and air or another oxidant are introduced 94 into the combustion chamber. A portion of the fuel is combusted 95 with the oxidizing agent in the combustion chamber 21 and coils 96 the unburned portion of the fuel. The temperature of the fuel thus heated is measured 98 and the combustion is controlled 99 depending on the measured temperature of the heated fuel so that the heated fuel has a certain temperature.

The combustion process is controlled in the process described in connection with the process, for example by controlling the supply of fuel and / or the supply of oxidizing agent. When the internal combustion engine and in particular its surface, at which fuel could condense, an elevated temperature, in particular the operating temperature, has already been reached, the temperature of the heated fuel can be set to a lower predetermined value than at the start of the internal combustion engine 12 or at a lower temperature. relevant surfaces of the internal combustion engine 12.

The device shown above in connection with Figures 1 to 3 and the method shown above in connection with Fig. 4 are useful, for example, in the use of ethanol as Otto fuel or ethanol-containing Otto fuels. Pure ethanol has a boiling point of 78.4 ° C at normal pressure.

Correspondingly low is its vapor pressure at temperatures at or below 0 ° C. The flash point of ethanol is at 425 ° C. In order, on the one hand, to prevent an ignition of ethanol already in the intake of the internal combustion engine z and, on the other hand, to reach such a small condensation of ethanol at cold surfaces of the internal combustion engine, the temperature of the heated ethanol is set, for example, at 200 ° C.

To obtain 1.55 g / s ethanol gas at 200 ° C, for example, about 62 mg / s ethanol is burned. 12 11 12 13 14 16 17 18 19 21 22 23 31 32 33 34 36 39 40 41 42 43 44 45 46 Manual designation list Intake of an internal combustion engine Cavity in the intake 10 Internal combustion engine Cylinder of the internal combustion engine 12 Injection valve of the internal combustion engine 12 Fuel line Fuel pump Damper Device for heating fuel Combustion chamber The chamber of the combustion chamber 21 Partially permeable component First valve Valve housing of the first valve 30 Opening Valve means of the first valve 30 Flushing means of the first valve 30 Line to flushing means 34 Inlet of the first valve 30 Injection cone of the first valve 30 Second valve Valve housing of the second valve 40 Opening Valve means of the second valve 40 Flush drive means of the second valve 40 Line for flush drive means 44 Inlet of the second valve 40 13 47 49 51 52 54 55 61 65 70 71 72 73 74 75 79 91 92 93 94 95 96 97 98 99 100 Air line Injection cone of the second valve 40 Catalyst device Heating device Heat radiation Heating device line 52 Temperature sensor Temperature sensor line 61 Control First output of the control 70 Second output of the control 70 Third output of the control 70 Output of the control 79 Input of the control 70 Control of the internal combustion engine First step (heating) Second catalyst (heating) operation of the internal combustion engine) Third stage (measurement of speed) Fourth stage (supply of fuel and oxidizing agent) Fifth stage (combustion of part of the fuel) Sixth stage (introduction of heated fuel) Seventh stage (setting of dampers) Eighth stage (measurement of temperature of the heated fuel) Ninth step (control of combustion) Tenth step (end of combustion) 14

Claims (1)

Claims 15. A device for supplying heated fuel to an internal combustion engine (12), comprising: a combustion chamber (21) having a first inlet (30) for supplying fuel and a second inlet (40) for supplying an oxidizing agent for burning a part of in fuel supplied to the combustion chamber (21) and for heating the unburned fuel; at least one controllable valve (30, 40) for controlling the supply of fuel or controlling the supply of an oxidizing agent in the combustion chamber (21); an outlet (23) for connecting the combustion chamber (21) to an intake (10) of the internal combustion engine (12) and for introducing fuel heated in the combustion chamber (21) into the intake (10) of the internal combustion engine (12). . The device of claim 1, comprising: a first controllable valve (30) disposed at the first inlet for controlling the supply of fuel to the combustion chamber (21); and a second controllable valve (40) provided at the second inlet for controlling the supply of oxidizing agent to the combustion chamber (21). . The device (20) of claim 1 or 2, further comprising: a catalyst device (51) for lowering a combustion temperature of the fuel. . An apparatus (20) according to any preceding claim, further comprising: a heating device (52) for heating at least a portion of the catalyst device (51). . Device (20) according to any one of the preceding claims, further comprising: a partially permeable component (23) at the outlet, for hindering a transition of an oxidizing agent from an intake (10) connected to the outlet in the combustion chamber (21). . Device (20) according to any one of the preceding claims, further comprising: an intake (10) for an internal combustion engine (12), which is connected to an outlet (23), for 15 10 15 20 25 30 10. 11. 12. 13 supply of oxidizing agents to the internal combustion engine (12). A method of operating an internal combustion engine (12) with an intake (10), via which the internal combustion engine (12) is supplied with an oxidizing agent, comprising the steps of: supplying (94) fuel and an oxidizing agent to an internal combustion chamber (21); burning (95) a portion of the fuel with oxidizing agent in the combustion chamber (21), wherein unburned fuel is heated; lead (96) the heated unburned fuel into the intake (10) of the internal combustion engine (12). The method of claim 7, wherein the portion of the fuel with the oxidant is combusted at a catalyst device (51), further comprising the steps of: heating (91) a portion of the catalyst device (51) prior to supply (94) of air or prior to supply (94) of oxidizing agent to the combustion chamber (21) or before combustion (95) of the fuel part. A method according to claim 7 or 8, wherein the fuel portion to be combusted is determined by the amount of oxidizing agent applied. A method according to any one of claims 7 to 9, further comprising the steps of: measuring (98) the temperature of the heated unburned fuel; controlling (99) the amount of fuel supplied to the combustion chamber (21) or the amount of the oxidizing agent supplied to the combustion chamber (21) depending on the temperature of the heated unburned fuel. A method according to any one of claims 7 to 10, wherein the unburned fuel is evaporated. A method according to any one of claims 7 to 11, wherein the method is performed at least at the start of the internal combustion engine (12) or for a certain time, in which the internal combustion engine (12) is to deliver a high power. A method according to any one of claims 7 to 12, further comprising the steps of: driving (92) the internal combustion engine (12) to increase the speed of the internal combustion engine (12). A method according to any one of the preceding claims, wherein the supply of fuel begins when a certain speed of the internal combustion engine (12) is reached. A method according to any one of claims 7 to 14, wherein the supply (94) of fuel to the combustion chamber (21) is terminated after a predetermined period of time (100). A method according to any one of claims 7 to 15, wherein the predetermined time period is at least dependent on the ambient temperature or on the temperature of the internal combustion engine (12). A method according to any one of claims 7 to 16, wherein the method is performed with a device according to any one of claims 1 to 6. A computer program for controlling an internal combustion engine, wherein the computer program is designed to perform a method according to any one of claims 7 to 17. A control (70) for an internal combustion engine (12), comprising an output (71, 72) for providing a control signal for a valve (30, 40) for controlling the supply of fuel or for controlling the supply of oxidizing agents in a combustion chamber (21), which is further designed to burn a part of the fuel supplied in the combustion chamber (21) and lead unburned fuel into an intake (10) of the internal combustion engine (12). The control of claim 19, comprising: a first output (71) for providing a control signal for a first valve (30) at the combustion chamber (21), for controlling the supply of fuel to the combustion chamber (21); a second output (72) for providing a control signal for a second valve (40) at the combustion chamber (21) for controlling the supply of oxidizing agent to the combustion chamber (21). A control according to claim 19 or 20, further comprising a third output (73) for providing a heating effect for a heating device (52) for a catalyst device in the combustion chamber (21) or for providing a control signal for the heating device (52). A control (70) according to any one of claims 19 to 21, further comprising: an input (75) for receiving a temperature signal indicating a temperature of the fuel heated in the combustion chamber (21). A control (70) according to any one of claims 19 to 22, wherein the control (70) is connectable to an additional control (79) of the internal combustion engine (12). A control (70) according to any one of claims 19 to 23, further comprising a device (20) according to any one of claims 1 to 6, wherein the control (70) is connected to the device (20) via wires (35, 45, 55). , 65). A control (70) according to any one of claims 19 to 24, wherein the control (70) is configured to control a method according to any one of claims 7 to 17. 18