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: 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: 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 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 fuel injection pump for internal combustion engines has a pump piston, defining a pump work chamber for generating an injection pressure; an electromagnetic control device for fixing the duration of supply during the supply stroke of the pump piston and a measuring device, which measures the return flow fuel quantity that did not attain injection during the supply stroke of the pump piston and emits an electronic return flow quantity signal (Q.sub.R). An electronic control unit imposes control signals (.phi..sub..mu.V) upon the control device as a function of the return flow quantity signal (Q.sub.R) and operating characteristics of the engine. To attain highly accurate closed-loop control of the fuel injection quantity, a fluctuation detector is provided, which detects fluctuations in the return flow quantity signal and emits the appearance of fluctuations over time in the form of detection signals (.phi..sub.A, .phi..sub.E, .phi..sub.1 -.phi..sub.4).

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 magnetic valve used for fluid control includes a valve housing, having a magnetic coil surrounding a core, and an armature, which is joined to a valve closing element which cooperates with a fixed valve seat. An end on which a collar is embodied, the valve closing element protrudes into an interior of a spring housing, which is slidably disposed counter to the force of a counterspring. A first bent end of an angle element is supported on a cover of the spring housing, while a second bent end grips the collar from behind and protrudes through a bottom opening of the spring housing. In the open position of the valve closing element, the second bent end is spaced apart from the collar by a distance a. In the valve closing element there is a compensation bore leading to the interior of the spring housing. After actuation of the magnetic coil, the armature displaces the valve closing element toward the valve seat counter to the force of the restoring spring.

Abstract: A valve control arrangement for an internal combustion engine with reciprocating pistons, comprises a combustion chamber valve, a driving cam of the combustion chamber valve, a movement transmission group arranged between the combustion chamber valve and the driving cam and having a pressure chamber which is fillable with a pressure medium and unloadable from the pressure medium, an unloading conduit through which the pressure chamber is unloaded, and electrically controlled blocking valve arranged in the unloading conduit for blocking and releasing the unloading conduit and therefore coupling or uncoupling the combustion chamber valve relative to the driving cam, the blocking valve being formed as electromagnetically controlled 2/2 directional control valve.

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.

Abstract: The invention is directed to an arrangement for controlling the quantity of fuel to be injected into an internal combustion engine. The arrangement includes at least one electrically operated control device determining the beginning and/or the end and/or the duration of the injection of fuel into the internal combustion engine. The electrically operated control device is influenced in dependence on its own control response. The arrangement of the invention thus makes it possible to correct the error resulting from variations in the pickup and dropout times of the electrically operated control device. Embodiments are described which take into account static and dynamic variations of the control response of the electrically operated control device.

Abstract: A magnetic valve, in particular a fuel metering valve for fuel injection systems of internal combustion engines, is proposed which serves to measure the injection quantity and control the instant of injection. In a valve housing, the magnetic valve has an electromagnet and a valve closing element actuated thereby, which cooperates with a fixed valve seat. To damp the opening movement of the valve closing element against a fixed stop and to keep the hydraulic forces of adhesion between the valve closing element and the stop low, a damping chamber that is open toward the valve closing element is disposed on the stop. As the valve closing element approaches, fluid is positively displaced out of the damping chamber in the form of a squish flow between the stop face and the head element of the valve closing element, so that recoiling is avoided due to thus-generated damping.

Abstract: In a vane type compressor, in which a plurality of radial vanes are supported on a compressor shaft and extended through a rotary piston, each vane is formed of two wall portions spaced from each other and two ring portions receiving bearings for supporting the vanes on the shaft. The wall portions and the ring portions of each vane are formed as a one-piece element which may be produced by stamping-out and bending a sheet metal. A supporting structure of kernels of aluminum disposed in a honeycomb manner is inserted between two wall portions of each vane.

Abstract: In a vane type compressor including a plurality of radial vanes extending from a compressor shaft through the slots in a rotary piston elastic flexible tubes are inserted in the slots and interconnected between the respective vanes and the rotary piston, which serve as sealing members on the vanes. Each flexible tube has an elongated bead engaged in a groove formed either in the vane or in the rotary piston.

Abstract: The invention is directed to a method and apparatus for controlling the charger of an internal combustion engine as required by the operator of the vehicle. A first switch switches in the charger by energizing a relay when the accelerator pedal is depressed down to the end of the full-load position thereof. A second switch is connected in series with the first switch and interrupts the supply circuit for the relay thereby switching out the charger when the angular position of the throttle valve has dropped below a predetermined value. Self-holding contacts of the relay are connected in parallel with and bridge the first switch. In this way, the full-load curve without the charger switched in corresponds approximately to the curve defining engine operation with charger where switch-out of the charger is about to occur.

Abstract: A vane-piston pump having a rotor supported eccentrically in a pump housing. The rotor is provided with slits for the passage through it of the vanes, and sealing strips are disposed at either side of the slits. The vanes slide along these sealing strips. Each sealing strip is subjected to the force of its own spring, and under the force of this spring, each sealing strip is pressed against the vanes.In this manner the spring forces can be kept smaller, so that friction is reduced. The vane-piston pump is preferably used in motor vehicles for generating compressed air in order to operate exhaust-gas treatment apparatus.

Abstract: A rotary vacuum pump is proposed, having a rotor with vanes which rotates eccentrically within a housing bore. Each vane is coupled with a body which is ineffective at relatively low pump rpm; however, at higher rpm, the body engages the vane in such a manner that it removes the vane from its track within the housing bore.In this manner, an rpm-dependent shutoff device is created for the pump. In cooperation with the furnishing of underpressure as an auxiliary pressure in motor vehicles, the pump is used to supplement the underpressure which prevails when the internal combustion engine is at low, idling rpm; this prevailing underpressure is at a very low pressure level, and so when it is thus supplemented there is sufficient auxiliary vacuum force available over the entire rpm range.

Abstract: A sliding vane compressor for use in refrigeration systems includes a rotatable hollow shaft, a cylindrical compressor rotor which surrounds the shaft, end covers enclosing the compressor rotor and a pair of vanes disposed within the rotor to compress a working medium entering the rotor. The compressor rotor and end covers have end faces in a contact area therebetween. At at least one of end faces of either rotor or end cover, a number of spirally-shaped grooves are formed curved in the direction of rotation of the rotor shaft. These grooves extend from the periphery of the respective end face toward the center thereof but short of said center to produce a flow preventing leakage of the working medium between the low pressure region and the high pressure region in the compressor.

Abstract: The engine is controlled by sensing fuel pedal position, indicative of desire engine power. A characteristic transmission data field is used to select the appropriate gear or gear ratio. The engine is controlled on the basis of characteristic engine data or on the basis of an engine operating curve associated with minimum fuel consumption in dependence of the changes in engine speed due to the changing transmission ratio. In normal driving, the apparatus selects operation along the minimum fuel curve whereas during periods of increased power demand, the apparatus operates in dependence of characteristic engine data. Also proposed is apparatus which takes account of the operational vehicle status and effects the switchover from optimum fuel consumption to optimum power delivery with priority assigned to optimum fuel economy.