Abstract: A piston pump which is contemplated for furnishing fuel at high pressure, especially gasoline with low self-lubricating properties. To avoid drive-side wear, a rotatably drive eccentric element is provided as the actuating device for the pump piston of the piston pump, the driving motion of the eccentric element being transmitted to the pump piston via a flexible transmission element.

Abstract: To reduce NO.sub.x components in the exhaust gas from a compression-ignition internal combustion engine with the aid of a reducing catalytic converter, a metering device for the supply of reducing agent to be additionally introduced into the exhaust gas, in the form of fuel, is provided to improve the performance of the catalytic converter. For this purpose, use is made of a positive displacement pump designed to meter very small quantities with a helix in the form of a helical groove arranged on a cylindrical body of revolution, the delivery rate being varied by driving the body of revolution at a variable rotational speed.

Abstract: A valve for the introduction of fuel or a fuel/air mixture in a combustion space of an internal combustion space of an internal combustion engine which works with charge stratification in the combustion space, and with spark ignition of the introduced fuel or fuel/air mixture by a spark plug. To ensure the ignition of the fuel/air mixture contained in the combustion space, there is branched off from an umbrella-like injection jet formed by the fuel or fuel/air mixture an ignition jet which, deviating from the umbrella-like or cone like configuration of the injection jet, comes into the region of the spark plug, in order thus to provide a fuel-rich fuel/air mixture in the region of a flashing over of the ignition spark of the spark plug. This takes place by means of a guide face of the valve, in which the guide face is interrupted by a recess.

Abstract: The adjustment device for continuously adjusting an angular orientation of a camshaft of an internal combustion engine relative in relation to a drive wheel of the engine, has a servomotor including a rotary piston nonrotatably attached to the camshaft and a plurality of adjusting segments between the rotary piston and the drive wheel equally spaced around the outer peripheral surface of the rotary piston and alternately attached to the rotary piston and the drive wheel so as to form a plurality of volume-adjustable working chambers connectable in pairs in operation; a pump located in the drive wheel and connected with the servomotor to receive an adjustably pressurized medium and to feed the adjustably pressurized medium to the servomotor means; a first control valve device connected to the pump for controlling supply of the adjustably pressurized medium to the pump to activate and deactivated the pump; and a second control valve device connected to the working chambers to select working chamber pairs and to

Abstract: A magnetic valve for controlling a flow opening of a connection line for guiding fluid, particularly fuel,valve has a valve housing having a guide bore hole, a valve member displaceably supported in the guide bore hole and bringable into contact with a valve seat encircling the flow opening under the action of a closing force and also liftable from the valve seat under the action of an opening force, a coupling member transferring the closing force to the valve member. The coupling member is guided in the guide bore hole and has a damping collar with an end face which faces in direction of the valve seat and is bringable into contact with a contact surface provided in the valve housing and extending substantially parallel to the end face of the damping collar.

Abstract: The invention relates to a gas-exchanging process for two-stroke internal combustion engines, and a two-stroke internal combustion engine for executing the process, in which two scavenging paths of the gas are provided, namely the known reverse scavenging as the first scavenging path, and a second supply of combustion air effected by precompression serving as the second scavenging path, wherein during the second scavenging an ignitable fuel-air mixture forms in the area of the point of ignition and, by means of the differential pressure established at the intake valve, controls the mixture as well as the quantity itself.

Abstract: A device for adjusting a rotational angle relationship between a camshaft and its drive element, comprising two circular segment shells provided on the drive element together with an interposed part forming two working spaces therebetween. The both shells are connected to one of the camshaft and the drive element, and the interposed part being connected to the other of the cam shaft and the drive element while the circular segment shells being movable relative to the interposed part in a setting action such that during adjustment in the setting direction the circular segment shells are adjusted so that the volume enclosed in a first one of the working spaces increases while the volume enclosed in a second one of the working spaces decreases. Each of said working spaces are connected to a first setting pressure medium source separately via a non-return valve which opens toward a respective one of the working spaces, and the working spaces can be directly connected to one another by means of a control valve.

Abstract: Fuel injection device for spark-ignition internal combustion engines having a pump and a distributor with a reversing valve, which distributor is preferably driven at pump speed and has a stationary and a rotating part. The reversing valve is arranged inside the rotating part of the distributor, preferably concentrically, and its inlet opening is connected with the pump work space via a line which likewise extends exclusively inside the rotating part of the distributor.

Abstract: A hydraulic valve control apparatus in an embodiment for multi-cylinder internal combustion engine having a reservoir chamber, assigned to a pressure chamber of a valve tappet and having a reservoir piston that serves as a valve, with which the reservoir chamber can be separated from the pressure chamber. The reservoir piston is shifted out of its position of repose to a reservoir function by a hydraulic thrust that is conducted in the reservoir chamber under the control of a magnet valve, via a control line in which a check valve is disposed. Displacement of the reservoir piston occurs only whenever a valve actuation takes place via the drive cam and as a result the working pressure adequate for the displacement of the reservoir piston prevails in the pressure chamber.

Abstract: A fuel-injection pump, especially a direct fuel injection in spark-ignition internal-combustion engines, with at least one pump for generating a fuel flow under pressure and with a rotary slide valve moved synchronously with the drive shaft of the internal-combustion engine and intended for assigning the fuel flow to at least one injection port of the internal-combustion engine and/or for branching off the fuel flow under pump pressure into a return line, the rotary slide valve is mounted so as to be displaceable to a limited extent in the direction of its axis of rotation and/or so as to be rotatable to a limited extent in relation to the rotary drive of the rotary slide valve.

Abstract: A fuel injection system, for internal combustion engines in which fuel is brought to high injection pressure and distributed via magnet valves to the various fuel injection locations with the aid of a simple, unregulated high-pressure injection pump; high-pressure injection does not take place until a fuel injection quantity control valve, connected to the distribution of the high-pressure side, has closed a relief line. It thus becomes possible to vary the injection time to the maximum possible extent, without entailing major structural expense.

Abstract: It is proposed in the case of an electromotive power steering as a steering aid for motor vehicles and similar, particularly for the speed range during parking (parking power steering), having a reduction gear between the servo-motor and the steering column or the drive leading on to the mechanical wheel displacement, that at least one clutch block be so arranged that it creates a drive connection from the servo-motor drive to the steering gear side of the steering column when, upon a moment being exerted manually at the steering wheel, a pawl connected to the steering wheel side of the steering column produces the requisite clutch pressure by mechanical action on the at least one clutch block, while the gear wheels acted upon by the clutch are formed as ring gears fitted to a carrier flange which is joined firmly to the driven section of the steering column so that it cannot rotate.

Abstract: A hydraulic engine valve control having a reservoir chamber, which is assigned to a pressure chamber of a valve tappet and has a reservoir piston, which at the same time serves as a valve by which the reservoir chamber can be disconnected from the pressure chamber. The reservoir piston is displaceable out of its position of repose into its reservoir function by a hydraulic control device that cooperates with a magnet valve. In this process, it is also attained that a plurality of valve control units of one internal combustion engine can be controlled via a single magnet valve, if their various control times do not overlap.

Abstract: In a reservoir-type fuel injection system, fuel can be supplied under pressure by a charge pump to two separate pressure reservoirs and the pressure reservoirs communicates via separate valve assemblies with injection nozzles via lines. By means of the separate reservoirs, overlapping of pre-injection and main injection events in different cylinders can be avoided.

Abstract: A hydraulic drive control device for internal combustion engines, having a reservoir magnet valve for controlling a volume of oil in a stroke transmission chamber, in order to control a timing cross section of the engine valve, wherein the magnet valve is closed when without current, and the valve member, embodied as a reservoir piston, is loaded by a reservoir spring acting as a closing spring.

Abstract: A hydraulic valve control with a (hydraulic) fluid reservoir allocated to a pressure chamber of a magnetic lifter, with a reservoir piston, reservoir, and reservoir spring, in which the pressure chamber is arranged between a cam piston actuated by the driving cam and a valve piston, the latter acting in conjunction with the engine valve, and in which the cam piston is configured as a hollow piston, in the cavity of which the fluid reservoir is arranged.

Abstract: A device for a combined blowout of fuel and air for fuel injection systems in internal combustion engines having a housing with fuel and air connections and a hollow, elongated housing neck having a blowout opening on an end that communicates with the fuel and air connection. Disposed on an end of the housing neck is an electromagnetically actuated valve element, which is pressed onto a valve seat by a valve closing spring. To make the device more efficient for fuel preparation, the valve seat is disposed on a coaxial inner tube that penetrates the housing neck and which extends into the blowout opening. The outer diameter of the inner tube is smaller than the inside diameter of the housing neck. The interior of the inner tube communicates with the fuel connection and the annular chamber enclosed by the inner tube and the housing neck communicates with the air connection.

Abstract: An electrically controlled fuel injection pump for internal combustion engines, in particular for direct fuel injection in engines having externally supplied ignition. A plurality of pump pistons driven by drive cams at a constant stroke and each leading into one cylinder bore, pump the fuel that has been brought to injection pressure in an associated pump work chamber to injection valves. A plurality of pump pistons are positioned side by side, radially of the camshaft. The work chambers of the pump pistons are connectable via a rotary slide valve to lines which lead to the injection valves and optionally to supply lines for supplying fuel to the work chambers of the pump pistons and the rotary slide can be driven in synchronism with the camshaft.

Abstract: An apparatus for adjusting an angular rotational relationship of a camshaft, serving in particular to actuate gas exchange valves of an internal combustion engine, with respect to its drive element, which apparatus has two control motors acting counter to one another, the mutually corresponding movable walls of which are coupled to one another, wherein to reduce an expense for furnishing control fluid and generating pressure in this control fluid the work chambers of the control motors are on the one hand both connected via a respective check valve, to a control fluid pressure source and on the other hand can be made to communicate selectively with one another directly via a control valve or can be disconnected from one another via this valve, so that torque fluctuations of the camshaft are exploited for generating pressure in one of the work chambers at a time and the resultant pressure is exploited purposefully at certain times for adjustment with subsequent relocking of the work chambers.

Abstract: A multiple cylinder internal combustion engine comprising an exhaust recycling system including an exhaust return line connected with an exhaust manifold of the internal combustion cylinder and exhaust metering device comprising a first metering member connected with a throttle valve of an intake manifold for joint actuation therewith and a plurality of turbulence nozzles, each of the turbulence nozzles being located in an immediate vicinity of an inlet valve of each combustion cylinder communicating a combustion chamber of a respective combustion cylinder with the intake manifold, the exhaust recycling system further comprising a header reservoir located downstream of said first metering member, and a plurality of separate exhaust return lines communicating the header reservoir with the plurality of turbulence nozzles, respectively.