Abstract: The invention relates to a super-charged fuel-injected internal combustion engine with an exhaust gas driven turbocharger and exhaust gas recycling. To increase the volume of recycled exhaust gases by means of an increase in the pressure drop between the pressure in the exhaust gas line upstream of the turbine and the pressure in the engine charging air line downstream of the compressor, a pressure control valve is provided in either the exhaust line downstream of the turbine or at the compressed air line of a bypass line bridging the compressor.

Abstract: A liquid-cooled, four-valve cylinder head for a multi-cylinder internal-combustion engine comprises a casting having a cooling-fluid space between the cylinder-head bottom and a cylinder-head cover in which supporting struts are arranged for reinforcing the cylinder-head bottom, valve channels of gas-reversing valves and chambers for receiving secondary combustion spaces. Above the cooling-fluid space is located a control space with guide housings for receiving the cup tappets for the actuation of the gas-reversing valves. In order to obtain a cylinder-head construction which is structurally rigid and nevertheless can easily be produced, the chambers are cast together with the valve channels within the cooling-fluid space. Further, the supporting struts are equipped with ribs projecting into adjacent combustion-space portions, and the lateral outer walls of the cylinder-head housing are connected to one another in the region of the control space by transverse booms.

Abstract: A method and apparatus for controlling the sequential coating of motor-vehicle bodies using a preprogrammed painter-robot is provided. As a result of wear, the signal/response delay times of valves and other control elements deviate from the information stored in the program. According to the subject invention, the actual signal/response delay time is measured and compared with the stored information stored in the program. In the event of unacceptable deviations in the actual verses stored signal/response delay times, the actuating times controlled by the program are changed in response thereto, and signals warning of excessive actual delay time are given.

Abstract: The invention relates to a closed hollow support which has stiffening sections in its interior. The stiffening sections are connected with the support section and with one another. The support sections, which form the outer surface of the hollow support, are welded together along longitudianl seams and at least one of them has holes which are suitable for guiding a welding tool, a screwdriver or a riveting tool used to connect the stiffening sections.

Abstract: The application relates to an anchoring of end points of safety belts or safety belt buckle attachments for rear seats of motor vehicles with rear-wheel drive, especially passenger vehicles or estate cars, in the vehicle floor region. In order to stiffen such an anchoring so that the mounting points cannot travel in the direction of the tensile forces occuring in the case of stressing as a result of an accident, the invention provides for the end points, together with a bridge passing under a drive shaft, to be fixed to the vehicle floor on both sides of the drive shaft.

Abstract: The invention relates to a welded joint between plastic parts, the welding quality of which can be checked in a non-destructive way. In particular, a coating of an X-ray contrast medium, of sharply set-off contour and of specific outline shape, is introduced, before welding, in the region of the welding gap. The coating is narrower or smaller than the zone to be welded. It can be a strip of specific width or a pattern comprising recurring contour parts. The coating can be printed on or take the form of an inserted auxiliary film. Coloring pigments based on heavy metal, metal powder, rock dust, powdered glass or ceramic powder come under consideration as X-ray contrast media.

Abstract: A magnetoelastic force-measuring device is proposed which has an annular thrust body possessing magnetostrictive properties and bearing a ring coil. To enhance the measuring sensitivity in conjunction with simultaneous good thermal error compensation, a sleeved tension body, likewise possessing magnetostrictive properties and bearing a ring coil, is arranged coaxially in the annular thrust body to fit in such a way that, given the introduction of a force, the one body is subjected to thrust and the other to tension. In this connection, the magnetostrictive properties are formed by a soft magnetic measuring film--preferably of amorphous metal--which applied in each case to the body, and the two ring coils are connected up to make an inductive half-bridge.

Abstract: A vacuum supply system for a brake power assist unit of a motor vehicle and at least one additional vacuum consuming device, is achieved by a parallel arrangement of two pipes leading from a vacuum generating device one to the brake power assist unit and one to the additional consuming device. Both pipes are equipped with flow control devices one of which is blockable by means of a check valve with an increased restoring or closing force for securing a vacuum supply priority for the brake power assist unit.

Abstract: The invention relates to a flat-track unit for motor vehicle test beds comprising a roadway-simulating belt guided over two rollers. So that skew angles between belt running direction and wheel plane can be realized as close to reality as possible on the test bed, the frame supporting the guide rollers of the belt is pivotably mounted about a vertical axis and is provided with a pivot drive variable in a high-frequency manner. The drive and braking unit for the rollers is arranged so as to be spaced from the flat-track unit and mounted in a fixed position in the vertical direction, while it is displaceable on a circular arc-shaped horizontal guide running concentrically to the vertical axis. A corresponding displacement drive is provided for the drive and brake unit. The latter causes the drive and braking unit to follow, at a comparatively slow speed, the belt running directions of the flat-track unit and on which belt torsional oscillations are superimposed.

Abstract: A rotary-latch lock in which a forked rotary latch is blocked against pivoting from a position locking a closing bolt. A spring loaded detent edge of a catch member engages behind a centrally directed catch edge extending from a circumferential edge of the forked rotary latch. In order to prevent an unintentional release of the rotary-latch lock, when the latter is subjected to dynamic stress, the catch edge is a limiting edge of an approximately U-shaped catch recess into which the detent end of the catch member engages. A rear edge of the detent end is located at a distance and opposite a limiting edge of the catch recess. In the event of oscillating movements of the forked rotary latch, the limiting edge butts against the rear edge of the detent end.

Abstract: A firearm comprises a chamber member, which is separate from the barrel and defines a chamber and which in a firing block, which is fixed to the receiver, is reciprocable between a firing position and a loading position in a direction which is transverse to the longitudinal direction of the barrel. When the chamber member is in its loading position its chamber is freely accessible and at one end communicates through a loading opening of the firing block with the interior of a magazine holder and at the other end communicates through an ejection opening of the firing block with an ejection shaft. For the performance of the loading and unloading operation, a slider is provided, which is movable in the longitudinal direction of the barrel and carries a feeder, which is movable from a first end position, in which the feeder is disposed on that side of the magazine holder which is opposite to the firing block, past said magazine holder toward the firing block as far as into the loading opening of said block.

Abstract: A lock cylinder having a cylinder housing in which a cylinder core is rotatably disposed and which can be locked with the cylinder housing via spring-loaded tumblers upon the withdrawal of a key from a key duct of the cylinder core. A bearing sleeve encloses the cylinder housing and the cylinder housing is rotationally fixed by means of an overload coupling in this bearing sleeve. A rotary connecting element, arranged behind the lock cylinder, leads to a locking mechanism which and can be connected with the cylinder core by a separating coupling. The lock cylinder, while maintaining its overload protection, becomes suitable for the rotational control of a locking mechanism which is arranged separately of the lock cylinder.

Abstract: A brake pressure setting device suitable for both an antilocking control system and drive slip control system is provided and uses a pressure modulator designed as a stepped cylinder defining a modulation chamber which can be connected to the main brake pipe of the brake circuit of the driven vehicle wheels and a control pressure space separated from the modulation chamber by a modulator piston. The control pressure space anc be connected to a pressure outlet of an auxiliary pressure source of alternatively to its non-pressurized sump tank for driving the pistion. A return spring biases the piston into a position associated with maximum volume of the modulation chamber. Connecting the control pressure space to the pressure outlet of the auxiliary pressure source moves the modulator piston into an end position provided for normal brake operation and suitable as an initial position for antilocking control system operation.

Abstract: Motor vehicle door lock or the like with a pivotally mounted locking catch (3), a pivotally mounted pawl (4) which blocks the locking catch (3) in a preliminary locking position and a main locking position, and with a locking mechanism (5) for operating the locking catch (3) and pawl (4). The locking mechanism (5) has an outside release lever (6), and when outside release lever (6) is operated, pawl (4) can swing into a release position freeing locking catch (3), e.g., by being lifted. The manipulation of the lock is improved since, in the opening movement, when the locking catch (3) is in the main locking position and the release lever (6) is operated, the pawl (4) is swung into the release position, where it is retained independently of the further operation condition of outside release lever (6) until the locking catch (3) has passed the preliminary locking position.

Abstract: In a process and arrangement for measuring a physical quantity using an optical sensor, for imparting a power modulation proportional to the measured quantity on an effective light flux, the physical quantity being obtained from a ratio of the luminous power of the effective light flux to that of a reference light flux, to achieve a high path neutrality of an optical transmission path, the spectral distribution S(.lambda.) of the effective light flux and the spectral distribution R(.lambda.) of the reference light flux is selected according to the relation: ##EQU1## with .lambda.min<.lambda..sub.1 <.lambda..sub.2 <.lambda. max, the light source being emitting in the wave range between the wavelengths .lambda.min and .lambda.max.

Abstract: A split flywheel construction having a spring arrangement coupling two flywheel elements together which works by friction dependent on centrifugal force, so that the coupling of the flywheel elements is stiffened at higher speeds. At operating speeds, an undesirable flexibility of a drive train is thereby prevented while at low speeds and with low friction a low resonant frequency is obtained below the vibration frequencies occurring in the drive train at these speeds.

Abstract: A rifle comprises a receiver, a firing mechanism mounted in the receiver, a barrel which is detachably connected to the receiver, and a stock, which is detachably secured to the receiver by built-in catches or the like and covers the receiver and the barrel at least in part and is provided with a trigger mechanism and a magazine holder.

Abstract: A liquid-friction coupling comprises a liquid-containing housing, a shaft, which coaxially protrudes into the housing, and the interdigitating sets of inner and outer blades, which are axially slidably mounted on the shaft and in the housing, respectively, and are non-rotatably connected thereto. Annular spreading springs are disposed between adjacent inner blades or adjacent outer blades. The distance between adjacent inner and outer blades can be changed by means of an annular piston, which is operable from the outside of the housing. To permit control of the liquid friction coupling within wide limits, the annular piston has a planar inner end face, which extends close to the blades and substantially throughout the cross-section of the interior of the housing. When the piston is in its outermost position the liquid contained in the housing is not in excess of 60% of the liquid capacity of the housing. The liquid has a viscosity of at least 30,000 centistokes.

Abstract: A cylinder head for air-compressing, self-ignition fuel-injection internal combustion engines has four valves per cylinder and an auxiliary combustion chamber between the inlet ducts of the inlet valves. In order to achieve a structurally stiff inclusion of the auxiliary combustion chamber in the cylinder head housing, the cylinder head top located between a coolant space and a control space is set at an angle in the transverse direction in such a way that the auxiliary combustion chambers are immediately adjacent to the cylinder head top and can be cast jointly with the cylinder head.

Abstract: The invention relates to a flat-track unit for motor-vehicle test beds in which a roadway-simulating belt is guided over two rollers lying in parallel. The upper test side of the belt lies roughly at ground level and accommodates a vehicle wheel and can be excited by a supporting shoe below the belt via an excitation cylinder to develop vertical oscillations which are to simulate roadway vibrations. The two belt-guiding rollers are in turn mounted in a frame which in turn is guided so as to be vertically movable and can be excited by a further excitation cylinder to develop vertical oscillations. In the process, the supporting shoe oscillations are limited to short-stroke and high-frequency oscillation portions of simulated driving conditions whereas the frame is excited merely by the long-stroke and low-frequency oscillation portions.