Abstract: An apparatus for the combined blow-injection of fuel and air for fuel injection systems of internal combustion engines having a housing with a fuel connection an air connection and a blow-injection opening communicating with the air and fuel connections. Two valves are disposed in the housing and simultaneously actuated by an electromagnet. Both valves are disposed concentrically with one another, directly at the blow-injection opening to make it possible for the mixing ratio to be determined solely by the opening duration of the valves by means of synchronously clocked metering of fuel and air. The valve seat of the air valve and the valve seat of the fuel valve are carried in common by a hollow shaft valve member actuated by the electromagnet.

Abstract: In a fuel injection apparatus having an injection nozzle opening at predetermined pressure, to which fuel is deliverable under pressure, the injection nozzle chamber communicates with a fuel supply line with the interposition of a check valve closing outward; the pressure in the fuel supply line is lower than the opening pressure of the injection nozzle. Furthermore, the injection nozzle chamber communicates with a work chamber of a spring-loaded work piston, the displacement motion of which for increasing the pressure in the nozzle chamber above the opening pressure of the injection nozzle is effected by relieving a second work chamber of the spring-loaded work piston under the influence of spring force.

Abstract: Fuel injection nozzle for internal combustion engines, in which a pre-injection is effected with directed fuel sprays and then a main injection is effected with an additional fuel umbrella spray. The individual phases are to run in exact timed sequence and the main injection is to be separated from the pre-injection by way of a pressure step. For this purpose, a valve sleeve (34) is placed on a valve needle (18) which opens in the flow direction of the fuel and is provided with a closing head (20), the valve sleeve (34) being pressed, according to the invention, by an additional spring (50) against the closing head (20) with which it controls an annular valve gap for the umbrella spray. The valve sleeve (34) is also provided with lateral spray openings (62) through which the directed sprays exit during the pre-stroke in which the valve sleeve (34) moves with the valve needle (18) under the influence of the additional spring (50).

Abstract: A method and a system for adjusting the lambda value of an air/fuel mixture to be supplied to an internal combustion engine wherein a throttle flap is adjusted in each case in such a manner that lean operation is obtained in a lower load range and a stoichiometric operation (lambda=1) is obtained in an upper load range.

Abstract: An apparatus for measuring particulate matter in a flue gas or exhaust gas of a combustion process comprising means for transmitting a beam of light between an optical transmitter and an optical receiver. The light passes through two diametrically opposed light slits closed by transparent bodies in the wall of the tail pipe and crosses through a flow of exhaust gas carried in the tail pipe. The attenuation of intensity of the light beam is a measure of the particulate matter. When the measuring apparatus is used to measure a soot concentration in an exhaust gas of internal combustion engines of a vehicle, it is mounted directly on the tail pipe, and the transparent bodies are heated in the vicinity of the faces acted upon by the exhaust gas flow to a temperature above the soot burn-off temperature. As a result, adulteration of the measured value by soot deposits in the measurement path to the transparent bodies is prevented, and continuous operation of the measuring apparatus is assured.

Abstract: A tank bleeder valve for the metered admixture of volatilized fuel to the fuel-air mixture of an internal combustion engine has a valve housing with inflow and outflow necks, between which an electromagnetically actuatable seat valve is disposed. The inflow neck communicates with the vent neck of a fuel tank, and the outflow neck communicates with the engine intake manifold. To prevent dieseling of the engine after the ignition is switched off, the seat valve is embodied such that it is very tightly closed when there is no current. To this end, the valve opening of the seat valve is embodied as an annular gap, coaxially surrounded on the inside and outside by a valve seat in the form of an annular double seat. The valve element of the seat valve is embodied as an annular disk of magnetically conductive material, which is loaded with a closing force acting in the closing direction of the seat valve. The annular disk simultaneously acts as the armature of the electromagnet.

Abstract: In lean operation of internal combustion engines having externally supplied ignition, improvement in terms of fuel consumption and emissions are obtained if the fuel is injected directly into the combustion chamber. Because the gas exchange guide cross sections are large, the space available for installing the injection valve and spark plug is very limited, and disruptions in the course of combustion occur when the injection valve and ignition device are too far apart. By developing a fuel injection valve that has wire electrodes on the injection end to serve as an ignition device, the spark gap arcing over in the vicinity of the fuel introduced by the injection valve, optimal ignition conditions are attained even for poorly ignited fuels or when the proportion of fuel in the combustion chamber charge is extremely low (stratified charge operation).

Abstract: An electrically controlled fuel injection pump for internal combustion engines, in particular for direct fuel injection in engines having externally supplied ignition contains a plurality of pump pistons driven by a single common cam. The pumping quantity of fuel is delivered by pumping pistons is controlled via a rotary slide valve to the injection nozzles at the injection sites of the engine, wherein the quantity control is effected by an electrically controlled valve. An axial conduit of the rotary slide which discharges into control bores or control grooves distributed over the circumference of the rotary slide and cooperates with the pump work chamber and the pressure lines to the injection sites and is adjoined by at least one further control bore or control groove which communicates with a pressure reservoir. By this means, a preinjection, separate from a main injection, is made possible at the top dead center charge change.

Abstract: A known control system for adjusting the lambda value of an internal combustion engine includes a corrective value ROM for transient operation wherein corrective values are stored for correcting the injection times for transient operation. In contrast thereto, the system according to the invention includes a corrective base value ROM 30, an adaptation value RAM 35 and an adaptation unit 34. The values from the corrective base value ROM are not utilized directly for correcting injection times; instead, these values serve as corrective base values which only become adapted corrective values by means of multiplication with adaptation values. The adaptation unit adapts the adaptation values in the adaptation value RAM. For this purpose, the adaptation unit determines the lambda value control deviations during a transient operation.

Abstract: A device for measuring particle emissions of an internal combustion engine, in particular the soot concentration in the exhaust gas, has a signal transmission route, located between a transmitter and a receiver, which traverses a flow of exhaust gas carried in an exhaust gas tube of the engine. To avoid soiling of the active elements of the transmitter and receiver that would cause inaccuracies in measurement, the signal transmission route is embodied as a beam of light, which passes through two diametrically opposed openings in the wall of the exhaust tube. The light-admitting openings are each closed with a respective transparent disk. The disks are heatable and are heated to a temperature above the burnoff temperature of the particles. Appropriate light emitting and receiving elements are used in combination with appropriate heating and evaluation circuits which indicate the soot concentration and which control fuel input to change the soot concentration.

Abstract: To reduce the construction expense and the space required for a fuel injection pump for supplying a plurality of cylinders of an engine, in particular an internal combustion engine having externally supplied ignition, a fuel injection pump including a drive shaft with a single common cam drives a plurality of pump plungers. The supply quantity is controlled via a rotary slide and a subsequent common distributor delivers the fuel to the injection nozzles at the injection sites of the engine. The quantity of fuel injected is effected by an electrically controlled valve seated in a relief line that branches off downstream of the rotary slide, which by closure of the relief line determines the injection phase.

Abstract: In a method for controlling the demagnetization phase of electromagnetic devices, particularly electromagnetic valves in combustion engines, the exciting current i=i(t), starting from a high holding current value, is decreased not to zero or even to a negative value, but to a value in the positive range below the holding current. Because of the characteristic current and/or voltage values which accordingly occur in the excitation circuit, the start of the opening and the end of the opening of the valve needle of the electromagnetic valve can be determined in a particularly precise manner and can be taken into account for an optimal influencing of the manner of operation of the combustion engine (FIG. 3).

Abstract: For controlling high-pressure phases during the stroke of a pump piston of a fuel injection pump, magnetic valves are also used, which are built into relief lines of the pump work chamber of such fuel injection pumps and which with the instant of closure of the relief line determine the injection onset and with the instant of reopening of the relief line determine the end of injection and hence the injection quantity. Such valves must be capable of switching rapidly, in view of the high rpm of internal combustion engines, yet must be as small as possible and use the least possible energy. By using a piston slide which in the closing state is balanced in pressure on the high-pressure side, and by relieving the chambers defined on the face end by the piston slide, a fast-switching, recoilless magnetic valve is obtained, which is opened by a restoring spring when the electromagnet is in the currentless state.

Abstract: A fuel injection pump, preferably for internal combustion engines operating by the Otto method, having a pump work piston driven to reciprocate and rotate simultaneously and defining two mutually independent pump work chambers, is proposed. The first pump work chamber pumps fuel into the combustion chamber of the engine that is in a state immediately prior to ignition, while the second pump work chamber pumps fuel into the combustion chamber operating offset from the other by 360.degree. of crakshaft angle. To this end, two distributor openings are disposed in the jacket face of the pump work piston, offset by 180.degree. from one another and each communicating with a different one of the pump work chambers.

Abstract: Device for injecting of fuel into internal combustion engines with an injection jet is provided with a stretched tension wire as a locking spring element for an outwardly opening valve locking member. The pretension of the tension wire is influenced by the current flow in an electrical current circuit which is fed to an electric resistor element being installed into the injection jet. The resistor element may be formed by the tension wire itself or by coil of an electromagnet, whose anchor is coupled with the tension wire. Thus, the opening pressure (P.sub.o) of the injection jet or the injection process can be controlled in a simple manner or may be formed accurately in accordance with a predetermined principle.

Abstract: A valve control arrangement for controlling closing and opening time of a valve actuatable by a valve control cam of a cam shaft via an axially displaceable valve plunger, in a displacement piston-internal combustion engine, the valve control arrangement comprises a stroke transmitting chamber between the valve control cam and the valve plunger and arranged to be filled with a working medium, a controllable opening for supplying the pressure medium into the stroke transmitting chamber and withdrawing the pressure medium from the latter so as to change an axial dimension of the stroke transmitting chamber between the valve control cam and the valve plunger, device for controlling the opening so that a stroke of the valve control cam which acts with the beginning of a valve opening adjusts the opening to an unloading cross-section so that to a closing point of time of the valve, a partial quantity of the pressure medium can flow out of the stroke transmitting chamber.

Abstract: A rotary piston compressor, particularly Root's type compressor, includes a housing which is made of only two portions, one of which is cut-shaped and accommodates pistons rotating in opposite directions, and the other of which is formed as a cover closing the end face of the first portion. The two portions are connected to each other and positioned relative to each so that they abut each other along a separation plane which extends centrally of a suction connection and a pressure connection formed on the housing diametrically opposed relative to each other.

Abstract: A device for the removal of solid particles, particularly soot particles, from exhaust gas discharged from an internal combustion engine includes an electrofilter comprised of a plurality of parallel filter tubes each having a separator tube connected to a positive terminal of a high voltage source and a corona discharge electrode connected to a negative terminal of the high voltage source, and a centrifugal separator formed as a multi-cyclone the cyclones of which are arranged in an axial extension of the electrofilter and are connected to the same.

Abstract: The magnetic valve for fluid control in a fuel injection nozzle includes a valve housing having a magnetic coil mounted on a core of ferromagnetic material and an armature, which is connected to a valve closing element cooperating with a fixed valve seat. After the excitation of the magnetic coil is interrupted, the valve closing element is moved toward a stop tappet by the force of a restoring spring and by the fluid pressure engaging the valve closing element. The stop tappet is supported such that it is displaceable in the opening direction of the valve closing element, counter to the force of a second spring. As a result, a large flow cross section is available for the fluid between the valve seat and a closing body of the valve closing element and a rapid pressure drop is made possible.

Abstract: A valve control arrangement for internal combustion engines with reciprocating pistons, comprises a housing having a housing opening, a valve piston axially displaceable in the housing opening, a valve closing spring, a valve plunger on which the valve piston acts against the valve closing spring, a cam piston axially displaceable in the housing opening, a valve control cam, a pressing spring which presses the cam piston against the valve control cam, a working chamber formed between the valve piston and the cam piston and arranged to be filled with pressure medium which transmits a lifting movement of the cam piston to the valve piston, the pressing spring which acts on the cam piston being arranged outside of the working chamber and supported at the side of the housing.