Abstract: Burner (10), in particular for a vehicle heater (12), having an orifice plate (14) separating an inner combustion region (16) from an outer region (18), wherein a photosensitive sensor (20) is arranged in the outer region (18), wherein at least two separate air inlet openings (22, 24, 26, 28) are being provided in the orifice plate (14), wherein one of the at least two air inlet openings (22, 24, 26, 28) is additionally formed as a light opening (28) which also allows light to pass from the inner combustion region (16) to the photosensitive sensor (20) that is arranged in the outer region (18), wherein the at least two air inlet openings (22, 24, 26, 28) are being shaped such that the same combustion air quantities flow into the internal combustion region (16) per unit time, respectively, and wherein the orifice plate (14) is transparent and/or the light opening (28) has a shape different from the air inlet openings (22, 24, 26) that are not formed as light opening such that an illumination area defined by th

Abstract: A method to operate a fuel-operated vehicle heater comprising the lowering of a combustion air ratio ? between supplied combustion air and supplied fuel to a combustion chamber of the fuel-operated vehicle heater from a starting value ?start>1 to a range ?<?start for a time period ?t.

Abstract: A method to operate a fuel-operated vehicle heater comprising the lowering of a combustion air ratio ? between supplied combustion air and supplied fuel to a combustion chamber of the fuel-operated vehicle heater from a starting value ?start>1 to a range ?<?start for a time period ?t.

Abstract: Burner (10), in particular for a vehicle heater (12), having an orifice plate (14) separating an inner combustion region (16) from an outer region (18), wherein a photosensitive sensor (20) is arranged in the outer region (18), wherein at least two separate air inlet openings (22, 24, 26, 28) are being provided in the orifice plate (14), wherein one of the at least two air inlet openings (22, 24, 26, 28) is additionally formed as a light opening (28) which also allows light to pass from the inner combustion region (16) to the photosensitive sensor (20) that is arranged in the outer region (18), wherein the at least two air inlet openings (22, 24, 26, 28) are being shaped such that the same combustion air quantities flow into the internal combustion region (16) per unit time, respectively, and wherein the orifice plate (14) is transparent and/or the light opening (28) has a shape different from the air inlet openings (22, 24, 26) that are not formed as light opening such that an illumination area defined by th

Abstract: A method is provided for controlling a filling (rl) of an internal combustion engine (2) including the camshaft phase adjustment in the case of a predefined setpoint filling (rlsol), including the following steps: carrying out the filling control based on an indicated pressure difference for obtaining a control variable (?Fuereg) for setting an air mass supply to the internal combustion engine (2); and ascertaining the indicated pressure difference (?pSR) as a difference between a predicted intake manifold pressure (psrpred) and an actual intake manifold pressure (pSR), the predicted intake manifold pressure (psrpred) corresponding to an intake manifold pressure which is necessary for reaching the setpoint filling (rlsol) at an aspiration curve which is predicted for a predefined time constant (?).

Abstract: A method for operating an internal combustion engine is described, the internal combustion engine including a cylinder having an inlet valve for supplying fresh air from an intake manifold in a controlled manner, an air filling being set in a certain operating mode by predefining a closing point in time of the inlet valve in an intake stroke at a constant intake manifold pressure.

Abstract: A method is provided for controlling a filling (rl) of an internal combustion engine (2) including the camshaft phase adjustment in the case of a predefined setpoint filling (rlsol), including the following steps: carrying out the filling control based on an indicated pressure difference for obtaining a control variable (?Fuereg) for setting an air mass supply to the internal combustion engine (2); and ascertaining the indicated pressure difference (?pSR) as a difference between a predicted intake manifold pressure (psrpred) and an actual intake manifold pressure (pSR), the predicted intake manifold pressure (psrpred) corresponding to an intake manifold pressure which is necessary for reaching the setpoint filling (rlsol) at an aspiration curve which is predicted for a predefined time constant (?).

Abstract: In a method for adapting a torque model for operating an internal combustion engine, which torque model indicates an ignition angle adjustment as a function of an air charge in a cylinder of the internal combustion engine, the torque model is adapted based on a variation of an operating variable of the internal combustion engine caused by a mode switching.

Abstract: An evaporator arrangement for an evaporator burner for a mobile heating device is provided, having: an evaporator body support into which a fuel supply line for supplying a liquid fuel opens, and an evaporator body for distributing and evaporating the liquid fuel. The evaporator body comprises at least one layer of a metal woven fabric of interwoven metal wires.

Abstract: In a method of operating an internal combustion engine with a switch-over capability between a compression ignition mode of operation and a spark ignition mode of operation in higher load ranges which includes a cam-operated valve drive with a valve control providing, in the compression ignition mode of operation, for an increased valve overlap of the valve opening times, smooth engine operation and optimal exhaust gas emissions are obtained also during rapid load changes upon changing the engine operating mode as the change-over is accompanied by changes of the injection parameters, the throttling parameter and the valve control, which are coordinated with respect to one another as the valve control is switched over by changing the amplitude and phase position of the valve stroke of at least one of the inlet and outlet valves.

Abstract: A method for operating a four stroke internal combustion engine in which the combustion position can be set/controlled/corrected. The phase position of intake and/or exhaust phase is shifted for this purpose. Compression ignition takes place at part-load, and spark ignition takes place at full load. In the event of a load change in the part-lead range, the theoretical shift in the combustion position is compensated by the shift in phase position of the intake and/or exhaust phase.

Abstract: In a method of operating a 4-stroke internal combustion engine selectively in a compression ignition operation, in which an outlet valve of the internal combustion engine is closed at a comparatively early closing time point with respect to a crank angle (?) and in spark ignition operation, in which the outlet valve is closed at a comparatively late closing time point with respect to the crank angle (?), during the changeover from the spark ignition mode of operation to the compression ignition mode of operation, the closing time point of the outlet valve is transferred from the late closing time point to the early closing time point in steps distributed over multiple 4-stroke cycles.

Abstract: Disclosed is a method for operating an internal combustion engine, wherein fuel is injected in a pre-injection and main injection process. According to the invention, pre-injection occurs in the intermediate compression stroke of the internal combustion engine. Main injection is carried out in an intake synchronous manner. The invention can be used for internal combustion engines, particularly for passenger cars and commercial vehicles.

Abstract: In a method for operating an internal combustion engine in which the angular locations where the fuel/air mix combustions takes place can be controlled by an adjustment of the inlet and outlet valve timing, the timing of at least one of the intake and exhaust valve opening phases is shifted depending on the engine speed so as to reduce engine emissions.

Abstract: In a method for operating an internal combustion engine having a variable compression ratio either in a compression ignition or in a spark ignition operating mode depending on the engine operating point, a higher compression ratio is provided in the compression ignition mode than in the spark ignition mode so as to optimize the operation of the internal combustion engine at low and medium engine loads, and to reduce engine emissions.

Abstract: In a method of operating a reciprocating-piston internal combustion engine with a combustion chamber in which a fuel mix with fresh gas is provided via intake ports and combustion exhaust gases are discharged through exhaust ports which can be opened by intake valves and, respectively, exhaust valves which are actuated by a valve operating mechanism, wherein an operating mode with external ignition, in which the fuel mix is ignited by a spark plug, is provided in part of the load range of the internal combustion engine, and an operating mode with compression ignition, in which the control of the gas exchange valves is altered so as to retain combustion exhaust gases in the combustion chamber for participation in the formation of the fresh mix is provided in another load range of the internal combustion engine, during a change in the operating mode the valve lift of at least one of the gas exchange valves is altered.

Abstract: A method retains exhaust gas in the combustion chamber of an internal combustion engine and compresses the exhaust gas during a charge change. A first fuel quantity is injected into the retained exhaust gas by direct fuel injection. A second fuel quantity is subsequently fed to the combustion chamber so that a homogeneous fuel/air mixture is obtained in the combustion chamber. An auto-ignition time of the fuel/air mixture which is formed from the first and second fuel quantities is set as a function of a quantity ratio of the first fuel quantity to the second fuel quantity.

Abstract: In a method for operating an internal combustion engine including a control device and having a cylinder including a combustion chamber formed in the cylinder between a cylinder head and a piston and in which a first combustion chamber pressure (p1) is measured before the start of the combustion, a second combustion chamber pressure (p2) is measured after the end of the combustion and a third combustion chamber pressure (p3) is measured during the combustion, and a combustion center position of the respective combustion process is determined therefrom by the control device and the engine operating conditions are adjusted so as to bring the combustion center position to an optimum position for minimizing fuel consumption and exhaust emission.

Abstract: In a method for operating an internal combustion engine in which the fuel is injected into a combustion chamber of a pre-injection and a main injection quantity, the quantity of fuel for the pre-injection, which is selected depending on the combustion location, is injected before the top dead center of the gas exchange, and the fuel for the main injection is injected synchronously with the induction of the air. The method is used in connection with internal combustion engines, in particular for passenger and commercial motor vehicles.

Abstract: 1. Method for operating an internal combustion engine 2.1. The invention proposes a method for operating an internal combustion engine in which the combustion position can be set/controlled/corrected. 2.2. According to the invention, it is provided that the phase position of intake and/or exhaust phase is shifted for this purpose. 2.3. Use for internal combustion engines, in particular for passenger and commercial motor vehicles.