Abstract: An apparatus for measuring the mass of a flowing medium, especially for measuring the aspirated air mass in internal combustion engines, which has a temperature-dependent resistor disposed in the path of a flowing medium, whose temperature and/or resistance is controlled in closed-loop fashion in accordance with the mass of the medium, with the control variable being a standard for the mass of the medium. The temperature-dependent resistor is embodied as a hot band and guided over at least three support points in the form of a loop. The band portions of the loop extending away from the intermediate support point are then connected with one another in an electrically conductive manner at a contact area. The hot band is disposed in the flowing medium in such a manner that one of the narrow faces performs as an exposed face of the hot band disposed counter to the flow direction, while the wide faces extend substantially in the flow direction.

Abstract: An inductive displacement transducer is proposed which serves to convert a mechanical movement into an electrical signal and in particular, in order to measure the fuel consumption of an internal combustion engine, the transducer ascertains the movement of an air flow rate meter disposed in the intake tube of the engine. The displacement transducer includes a core comprising two E-shaped sets of arms disposed symmetrically relative to one another, of which one set of arms serves as the measuring arm set, the middle arm of which is surrounded on one end by a measuring magnetic coil and on the other end by a measuring short-circuit ring connected with the air flow rate meter, and the other set of arms acts as a reference arm set, the middle arm of which is surrounded on one end by a reference magnetic coil and on the other end by a fixed reference short-circuit ring. The measuring short-circuit ring is connected with a leaf spring, which is secured on the air flow rate meter.

Abstract: An apparatus is proposed for controlling the electric current through inductive consumers, in particular through a fuel metering valve in internal combustion engines, this apparatus representing a two-point closed-loop controller and functioning with a single threshold switch for an upper and a lower threshold. The apparatus includes one current-measuring resistor each in the freerunning circuit and in the main current circuit, both measuring resistors being members of a voltage divider between the two supply voltage lines and whose middle junction is carried to the threshold switch. By means of a resistor-diode network in combination with the threshold switch, a correction can be made in the individual switching thresholds in accordance with supply voltage.

Abstract: An apparatus in which tablet strip packages are transferred with the aid of revolving suction devices out of a horizontally-functioning stamping device to a horizontally disposed conveyor belt. The suction devices are radially secured on a transfer head, which is rotatably supported on a swing. Thus, a straight-line transfer path from stamping device to conveyor belt is provided which allows for a shorter transfer time.

Abstract: There is described a method and an apparatus for use with the fuel preparation system of an internal combustion engine, for example, a fuel injection system which operates injection valves with electrical control pulses. When the gas pedal of a vehicle is actuated abruptly, the air flow measuring device of such systems is subject to oscillations around its equilibrium point, and the initial one of these swings is used to cause enrichment of the fuel-air mixture. The return swing generates an undesired lean signal which is suppressed by a "damping circuit". In addition, there is provided mixture enriching during steady applications of the gas pedal by means of a time-decaying enrichment signal generated by a slow acting circuit which operates in superposition to the action of the damping circuit. Both circuits may be suppressed by a blocking circuit during certain engine conditions, for example, during engine starting and engine overrunning as well as on the basis of temperature.

Abstract: An electro-mechanical switch, which is part of an electrical current circuit, is disposed in a fuel injection nozzle for internal combustion engines. The first switch contact is secured via an insulating body of a pressure bolt of the nozzle needle; the second switch contact is held pressed against the first switch contact by a contact spring supported on the pressure bolt, so that the portion of the electrical current circuit comprising the nozzle is closed. At the beginning of the opening stroke of the nozzle needle, the second switch contact, because of its inertia of mass, briefly fails to follow the first contact so that the electrical current circuit is interrupted; it is closed by the followup of the first switch contact caused by the contact spring. The switch can be inserted inside a normal injection nozzle without great expense.

Abstract: There is described a pump assembly which, in a unitary structure, comprises an electric pump drive motor and a two stage pump contained within a common housing. The motor drives the first stage of the pump upstream of the second stage which supplies the fuel, by creating a higher output from the first stage, which supply pressure is produced on the suction side of the second stage to maintain the pressure build-up in the pump. An air discharge is provided ahead of the inlet to the suction side of the second stage to dispell gases created in the fuel by the elevated pump pressures.

Abstract: A fuel control system for an internal combustion engine in which the accelerator pedal is set by the operator and defines an air flow control variable which is applied to a control loop that actuates a servo motor or other suitable rotary means to set the relative position of an air flow control flap within the induction tube. The control loop attempts to maintain the position of the air flow flap in continuous correspondence with the accelerator pedal position. The actuating current for the final control element is used as one input datum for a stored data field. Another input variable to the data field is the actual position of the air flow valve or flap. The data field contains empirically obtained data relating these two variables with the prevailing air flow rate and generates an output signal that is used as the air flow rate signal in a control pulse generator. The control pulse generator also receives other signals related, for example, to temperature, engine speed, etc.

Abstract: A fuel injection pump having a hydraulic adjuster for the instant of injection is proposed, in which in addition to the rpm-proportional adjustment of the onset of injection, a supplementary variation of the onset of injection occurs in accordance with pressure related to altitude.

Abstract: The device for fastening an object to a wall or the like by a push-in mounting, comprises an externally threaded bolt, at one end of which a nut can be threadedly advanced, and on the other end which is at least partially conical and whose maximum diameter is at most equal to the diameter of the bolt, has displaceably mounted thereon an expander element composed of two half-shell like parts. The two parts of the expander element are provided at their longitudinal edges opposite to one another in the mounted condition with integral lobes disposed transversely symmetrical and, when viewed in development, point-symmetrical, in relation to one another. The edges of the lobes are formed in such a way as to provide, when disposed on the externally threaded bolt, a form-locking connection.

Abstract: An apparatus is proposed for controlling the exhaust recirculation rate in an internal combustion engine, in particular an engine with auto-ignition, which includes preferably one mixture valve in the area of the discharge opening of the exhaust recirculation line and which is characterized in that the control is accomplished via the mixture valve position ahead of the inlet valves in accordance with the concentration of at least one component of the air-exhaust gas mixture and/or at least one component of the exhaust gas. Thus it is possible to operate the engine with a relatively emission-free exhaust. An exhaust gas reservoir is further provided, with which peaks in the exhaust gas concentration due to a dynamic driving mode can be intercepted. Finally, it is also proposed that the exhaust recirculation be realized solely via a pressure, which can be controlled in open-loop or closed-loop fashion, in the exhaust line by means of a valve.

Abstract: An apparatus is described for controlling recirculated exhaust gas quantities in self-igniting internal combustion engines which have a fuel injection pump. Two parameters, the rpm (preferably via the rpm-dependent suction chamber pressure) and the position of the quantity-adjusting device, are obtained from the fuel injection pump and delivered to a performance-graph memory in which a control value for the recirculated exhaust gas quantity is stored in accordance with these parameters. A recirculated exhaust gas quantity control device is actuated in accordance with the recalled control value.

Abstract: An internal combustion engine is proposed with combustion chambers, comprising a main combustion chamber and an ignition chamber, the latter being connected to the main combustion chamber by at least one spill port, for the purpose of improving the ignitability of a relatively lean fuel mixture of an internal combustion engine. In this connection, the ignition chamber forms an elongated, closed cylinder wherein terminate spill ports from the main combustion chamber essentially radially and tangentially to the cylindrical wall of the ignition chamber, so that a turbulence is created in the medium introduced via the spill ports along the cylindrical walls of the ignition chamber, with a secondary swirl flowing back in the center. Thereby, a satisfactory separation of the freshly introduced medium from the residual gases remaining in the ignition chamber after the combustion is attained, thus providing optimum conditions for the ignition of the fuels utilized for operating the internal combustion engine.

Abstract: An injection timing device is proposed for internal combustion engines, by means of which the mutual rotary position of the output shaft with respect to the input shaft can be varied in dependence on the speed and on at least one further operating parameter. The timing device comprises flyweights, operating in dependence on the speed against the force of resetting springs, and hydraulically operated control elements which engage the flyweights, these control elements, which are effective radially toward the outside, being accommodated within the timing element. By changing the position of the control elements, the radial position of the flyweights, which otherwise is determined only by centrifugal force, can be additionally varied in dependence on at least one further operating parameter of the engine, preferably the load, in order to correct the instant of injection.

Abstract: The invention relates to improvements in a four cycle valve-in-head internal combustion engine, the combustion chamber of which has at least one inlet and one outlet valve each of these valves having plate surfaces which are located at least substantially within the geometric cylindrical surface defined by the piston of the engine. On the one hand, the plate of the outlet valve is positioned in a zone spaced only slightly from the piston when it is the top-dead center position and thereby forms a compression surface area for portions of the charge to be compressed. On the other hand, the plate of the inlet valve is disposed in a portion of the cylinder head which defines the primary clearance volume of the combustion chamber together with the opposed piston top.

Abstract: A brush including a molded head that includes the bristles and a handle holder. The handle is made in two pieces one of which slips into the other for securing the handle in a retracted or an extended position. A collar in combination with the handle secures the handle in its retracted or extended position.

Abstract: A tube bundle heat exchanger including elastic sealing means wherein the elastic medium is confined within separate chambers and compressed in all directions against the inner wall surface of the chambers and heat exchanger tubes within the chamber. Pressure plates that exert pressure on the elastic medium are provided with projections which provide a spacing between the pressure plates. This spacing may be used for inspection for leaks and also permits flow of fluid to the outside if there is a leak.

Abstract: A pressure control valve to control the pressure of a fluid in a fluid system so that it remains constant. This type of valve can be utilized as element of a fuel injection system for internal combustion engines, and has storage means which are independent of the valve member, and actuatable by the pressure of the fluid. The pressure control valve comprises a housing and a support assembly urged toward a valve seat by a control spring. Additionally, a storage spring in the support assembly urges a closing member toward the valve seat. The closing member is slidably received in a bore in the support assembly. The support assembly is connected to a membrane which is tensioned between the housing members. Other variations of this device are also revealed herein.

Abstract: A fuel supply system for an internal combustion engine which includes sensors that signal the condition of engine braking (negative output torque) and which shut off fuel during such a condition. According to the invention, there is provided a special circuit which recognizes the termination of the fuel shut-off phase during engine braking and which causes excess fuel to be admitted to the engine just after the resumption of fuel supply after engine braking. The excess fuel is supplied in order to overcome fuel starvation due to condensation of fuel on induction tube walls which had cooled off during overrunning. The special fuel boost circuit receives information related to the air temperature and the air flow rate in the induction tube and uses it to adjust the time constant of a multivibrator which controls the amount of fuel added.