• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE536307C2
    申请号:SE1050202
    申请日:2008-07-30
    公开日:2013-08-13
    发明作者:Stephan Bolz；Carsten Goette
    申请人:Continental Automotive Gmbh；
    IPC主号:
    专利说明:

    l0 536 307 unburned part of the fuel. The heated, especially evaporated fuel is led into the intake of 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.
    For ignition of 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 with the aid 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 refueling 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-pored foam, a fabric. a table cloth. a net or other 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 located or in an area of the intake 10, through which air or another oxidant only flows 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 fl 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 may 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 consumption, so that the valve 30, 40 is closed and the time consumption where the valve is open.
    Arranged in the combustion chamber 21 is a catalyst device 51, at the surface of which a catalyst is arranged which reduces the flash point or the 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 recovered.
    At the one in F ig. In the embodiment shown, the heating device 52 is arranged within the catalyst device near its surface in an area facing the first valve 30.
    The heating device 52 comprises, for example, a NTC (Negative Temperature Coefficient) resistor or another electrical resistor or coil for inductive heating of the catalyst device. Alternatively, the friend device is integrated in the Catalyst device. For example, the catalyst device may be arranged as a single 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 jet or in the form of drops. 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. In the combustion chamber 21 a temperature sensor 61 is further arranged, for example a temperature-dependent electrical resistance 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 valve. 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 additional 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 implemented, for example, in Hardware, Firmware or Software. For example, the device 20 and the guide 70 are designed to dispense preheated fuel, in particular vaporized fuel, into the cavity 11 of the intake 10 at certain predetermined operating positions of the internal combustion engine. In addition, the guide 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 turning device 52 so that at least a portion of the surface of the catalyst device 51 is heated to such an extent that combustion begins there.
    The controller 70 controls the injected or blown amount of air or another oxidizing agent so that only a portion of the fuel is burned in the combustion chamber 21 and the unburned fuel is heated above a predetermined temperature, for example to a temperature above its boiling point. The thus extinguished unburned fuel is discharged via the partially permeable component 23 in 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 oxidant and a guide 70 are constructed and designed similar or in the same manner as those above for the embodiment shown in connection with Fig. 1.
    The embodiment shown in Fig. 2 differs from the one above in connection with the embodiment shown in Fig. 1, in particular 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 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, a catalyst is arranged similarly in the embodiment shown above in connection with Fig. 1. 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 wound up through the heating device 52. In this embodiment, the friend device 52 comprises a source of friend 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 heating device shown in Figs. In 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 two 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 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 fl your injection valves, which is 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 example, 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 settings can be controlled at the internal combustion engine 12. The control already shown in connection with Fig. 1 and Fig. 2 70 may be connected to the control 79 of the internal combustion engine 12 (for example via control lines). Alternatively, the guide 70 and the guide 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 device 20 provided with the first valve 30 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 intake between the air filter 19 and the damper 17. When 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 embodiments in Fig. 3, the first valve 30 may 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 by 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 so 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 heated 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 Figures 1 to 3 may have only one controllable valve. According to a further alternative, both the fuel supply and 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 circuit diagram of a method for heating fuel for an internal combustion engine, which can be carried out, for example, by means of the devices 20 shown according to Figures 1 to 3 and controlled, for example, by means of controls 70 shown according to 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 performed 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, at least a part of a catalyst device 51 is heated by means of a heating device 52 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, at 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 air. In a sixth stage 96, the combustion of the heated unburned fuel is conducted 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 , with a suitable choice of the amounts of fuel and air initiated in the combustion chamber 21 and with a suitable choice 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 has reached the predetermined temperature falls, the time at which the internal combustion engine has reached the predetermined water / number 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 adjusted so that at least the surface of the catalyst device 51 is as fast as possible completely when the predetermined temperature. 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 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 described starting process, all the 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 internal combustion engine for combustion is present. fuel in the manner described, 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 fuel amounts supplied to the internal combustion engine 12 are increased in other ways.
    The devices 20 described above in connection with Figures 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 emitted 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 heats 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 meadow pressure at temperatures at or below 0 ° C. The flash point of ethanol is at 425 ° C. In order to prevent 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, to 200 ° C.
    To obtain 1.55 g of ethanol gas at 200 ° C, for example, approx. 62 mg / s ethanol. l0 11 12 13 14 16 17 18 19 21 22 23 31 32 33 34 36 39 40 41 42 43 44 45 46 536 307 Reference reference list Intake of an internal combustion engine Holiness of the intake 10 Internal combustion engine Cylinder of the internal combustion engine 12 Injection valve of the internal combustion engine 12 Fuel line Fuel line damper Air filter Device for heating fuel Combustion chamber Combustion chamber 21 wall 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 First injection cone valve 30 Second valve Valve housing of the second valve 40 Opening Valve means of the second valve 40 Flushing means of the second valve 40 Line for flushing 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 99 100 536 307 Air line Injection cone at the second valve 40 Catalyst device Heating device Heat radiation Line for heating device 52 Temperature sensor Line to temperature sensor 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 stage (catalyst heating) Second step (operation of the internal combustion engine) Third step (measurement of speed) Fourth step (supply of fuel and oxidant) Fifth step (combustion of part of the fuel) Sixth step (introduction of heated fuel) Seventh step (adjustment of damper) Eighth step (measurement of temperature of the heated fuel) Ninth step (control of combustion) Tenth step (end of combustion) 14
    权利要求:
    Claims (20)
    [1]
    A device (20) for supplying heated fuel to an internal combustion engine (12), comprising a combustion chamber (21) having a first inlet (32) for supplying fuel and a second inlet (42) for supplying an oxidizing agent for to burn a part of fuel supplied to the combustion chamber (21) and to heat the unburned fuel, the amount of oxidizing agent added to the combustion chamber (21) being able to burn only a part of the fuel, characterized in that a catalyst device (ä) is arranged to lower the combustion temperature of the fuel, - that a heating device (52) is arranged to heat at least a part of the catalyst device (51), - that at least one controllable valve (30, 40) is arranged to control the supply of fuel and / or that controlling the supply of an oxidizing agent to the combustion chamber (21), - that an outlet (23a) is arranged to connect the combustion chamber (21) to an intake (10) of the internal combustion engine (12) for initiating a (21) heated fuel for the internal combustion engine (12), - that the outlet (23a) consists of a partially permeable component (23b), - that the partially permeable component (23b) is arranged in the cavity (11) of the intake (10) on such that it is located in a central area of the intake cross-section, and - that the partially permeable component (23b) is arranged at the outlet (23a) to provide a pressure gradient between the combustion chamber (21) and the cavity (11) of the intake (10). and thereby ensure that only fuel heated in the combustion chamber (21) passes over from the combustion chamber (21) into the cavity (11) of the intake (10) and prevents oxidizing agent from flowing from the cavity of the intake (11) into the combustion chamber (21), and - that the permeable component (23b) consists of a porous or microporous element with openings or pores.
    [2]
    Device (20) according to claim 1, characterized in that the intake (10) is arranged for supplying oxidizing agent to the internal combustion engine (12). If '10 15 20 25 30 536 307
    [3]
    A method of operating an internal combustion engine (12) provided with an intake (10), via which the internal combustion engine (12) is supplied with an oxidizing agent, and further comprising a combustion chamber (21) having a first inlet (32) for supplying fuel and a second inlets (42) for supplying an oxidizing agent for burning a part of fuel supplied to the combustion chamber (21) and for heating the unburned fuel and where the amount of oxidizing agent added to the combustion chamber (21) is capable of burning only a part of the fuel, characterized by the steps of supplying fuel to the combustion chamber (21) via at least one controllable valve (30, 40), and supplying oxidizing agent to the combustion chamber (21) via at least one controllable valve (30, 40) in such an amount that only a part of the fuel can be combusted, - lowering the combustion temperature of the fuel by means of a catalyst device (51). heating at least a part of the catalyst device (51) by means of a heating device (52), so that the heat released during the combustion of a part of the fuel leads to heating of the remaining, unburned fuel, - use of a partially permeable component ( 23b) arranged in the cavity of the intake (11). placing the partially permeable component (23b) in a central area of the intake cross-section, the permeable component (23b) consisting of a porous or microporous element with openings or pores, - generating a pressure gradient between the combustion chamber (21) and the intake ( Cavity (11) by using the partially permeable component (23b) - introduction of the fuel heated in the combustion chamber (21) to the internal combustion engine (12), via an outlet (23a) which connects the combustion chamber (21) to an intake (10 ) of the internal combustion engine (1 2), - preventing oxidizing agent from the suction cavity (11) from passing into the combustion chamber (21) due to said pressure gradient.
    [4]
    A method according to claim 3, characterized by the further step of heating (91) a part of the catalyst device (51) before supply (94) of fuel or before supply (94) of oxidizing agent takes place to the combustion chamber (21) or before combustion (95). ) of the fuel component takes place. 536 307
    [5]
    Method according to claim 3 or 4, characterized by the further step of determining the fuel part to be combusted by the amount of oxidizing agent applied.
    [6]
    Method according to one of Claims 3 to 5, characterized by the further step of measuring (98) the temperature of the heated unburned fuel; and control (99) of the amount of fuel supplied to the combustion chamber (21) or the amount of the oxidizing agent supplied to the combustion chamber (21) takes place depending on the temperature of the heated unburned fuel.
    [7]
    Process according to one of Claims 3 to 6, characterized in that the further step of heating the unburned fuel to evaporation.
    [8]
    Method according to one of Claims 3 to 7, characterized in that the method is carried out at least at the start of the internal combustion engine (12) or for a certain time in which the internal combustion engine (12) emits high power.
    [9]
    Method according to any one of claims 3 to 8, characterized by the further step of driving (92) the internal combustion engine (12) to increase its speed and start the supply of fuel when a certain speed of the internal combustion engine (12) has been reached.
    [10]
    Method according to one of Claims 3 to 9, characterized by the further step of interrupting the supply (94) of fuel to the combustion chamber (21) after a predetermined period of time (100).
    [11]
    Method according to claim 10, characterized by the further step of determining the time period depending at least on the ambient temperature and / or on the temperature of the internal combustion engine (12).
    [12]
    Method according to one of Claims 3 to 11, characterized in that it is carried out by means of a device according to one of Claims 1 to 2.
    [13]
    A computer program for controlling an internal combustion engine, wherein the computer program is designed to perform the steps of the method according to any one of claims 3 to 12.
    [14]
    A control device (70) for a device (20) which supplies heated fuel to an internal combustion engine (12) and which comprises a combustion chamber (21) having a first inlet (32) for supplying fuel and a second inlet (42) for supplying an oxidizing agent and a combustion chamber (21), that the device comprises an outlet (23a) with a partially permeable component (23b), arranged in the cavity (11) of the intake (10) in such a way that it is placed in a central area of the intake cross-section and thus provides a pressure gradient between the combustion chamber (21) and the cavity (11) of the intake (10), and that unburned fuel is led into an intake (10) at the internal combustion engine (12). characterized in that the control device (70) controls valves (30. 40) via outputs (71, 72), for regulating the supply of fuel or oxidizing agent to a combustion chamber (21), in such a way that the amount added to the combustion chamber (21) oxidizing agents are only able to burn part of the supplied fuel.
    [15]
    Control device (70) according to claim 14, characterized in that a first output (71) is arranged to provide a control signal for a first valve (30) at the combustion chamber (21), for controlling the supply of fuel to the combustion chamber (21); and that a second output (72) is arranged to provide 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).
    [16]
    Control device (70) according to claim 14 or 15, characterized in that a third outlet (73) is arranged to provide a heating effect for a heating device (52) for a catalyst device in the combustion chamber (21) or to provide a control signal for the heating device (52).
    [17]
    Control device (70) according to one of Claims 14 to 16, characterized in that an input (75) is arranged to receive a temperature signal which shows a temperature of the fuel heated in the combustion chamber (21).
    [18]
    Control device (70) according to one of Claims 14 to 17, characterized in that the control device (70) can be connected to a further control (79) at the internal combustion engine (12).
    [19]
    Control device (70) according to any one of claims 14 to 18, characterized by a device (20) according to any one of claims 1 to 3, wherein the control device (70) is connected to the device (20) via wires (35, 45, 55, 65).
    [20]
    Control device (70) according to one of Claims 14 to 19, characterized in that the control device (70) is arranged to control a method according to one of Claims 3 to 12.
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    SE1050202A1|2010-05-18|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102007039406.5A|DE102007039406B4|2007-08-21|2007-08-21|Apparatus, method, computer program and controller for operating an internal combustion engine|
    PCT/EP2008/059973|WO2009024439A1|2007-08-21|2008-07-30|Device, method, computer program, and controller for operating an internal combustion engine|
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