Abstract: A heating and air-conditioning installation for motor vehicles, in which an adjustable desired temperature is kept constant in the interior space of the motor vehicle independently of changing conditions, includes a heat-exchanger connected to the hot water circulation of the engine as well as an adjusting member on whose position is dependent the heat quantity supplied to the vehicle interior space; the position of the adjusting member is controlled by an output signal produced by an electronic circuit as a function of the sensor detecting the heat quantity supplied to the vehicle interior space, an interior sensor, a setting device and an outside sensor; a switching device operable to switch from fresh-air operation to recirculated-air operation is also controlled as a function of a signal of the electronic circuit; the electronic circuit includes a delay element to produce a time-delayed intermediate signal from the values obtained from the interior sensor, the outside sensor and the setting device; the in

Abstract: A fuel tank, preferably made of plastic material, to the filler neck of which an attachment base for a cap is so secured that dimensional tolerances as also dimensional changes caused by differing coefficients of temperature can be compensated by an elastic seal which is axially clamped therebetween; the attachment base is thereby axially supported against an abutment surface of the filler neck by means of an annular shoulder by way of an interposed elastic sealing means.

Abstract: A bumper arrangement for a motor vehicle, especially an automobile, with the bumper arrangement including a bending-resistant support mounted on a part integrally secured with the motor vehicle. A front of the support accommodates a preferably replacable energy absorber composed of at least one component. The energy absorber itself is partially surrounded by a shell made of a viscoelastic material. The shell is connected to a covering part of viscoelastic material having a downwardly projecting skirt segment and an upwardly extending segment which is extended in a direction toward adjoining body portions of the motor vehicle. A front side of the support is made essentially flat and is adapted to receive a middle segment of the covering part. For attachment of the shell to the covering part locally discontinuous guide grooves are provided in an area of the upper segment and skirt segment, the guide grooves being adapted to lockingly accommodate the appropriate projections or ends of the shell.

Abstract: A recirculating pumping device for an anti-locking two-circuit motor vehicle brake system, with the pumping device including one pump piston provided for each brake circuit. The pumping device recirculates brake fluid released from the wheel brake cylinder or cylinders to a master brake cylinder during an anti-locking regulating or control process. The pumping device includes piston pumps, with one pump being provided for each braking circuit of the braking system. The piston pumps are constructed as free piston pumps having working chambers connectable periodically to a pressure source provided on the vehicle through a valve. The valve is switchable at a predetermined switching frequency or may be vented to the tank of the pressure source. The pistons are preferably constructed as stepped pistons, so that the recirculating pumping device may be adapted to the pressure level of a pressure source already available on the vehicle by an appropriate selection of a ratio between the piston surfaces of the pistons.

Abstract: An engine block includes a crankshaft, and is enclosed by a sheath. Sealing elements connect the sheath to the engine block and insulate against structure-borne sound. A flywheel is non-rotatably connected to the crankshaft at one end of the engine block. A power train housing is disposed at that end of the engine block and includes a flywheel housing which accommodates the flywheel. The flywheel housing is rigid with the engine block and forms a unit therewith. The sheath encloses the engine block on all sides and defines an oil chamber around the engine block. The sealing elements consist of rings provided at opposite ends of the engine block. The unit is carried by and connected to a support by elastic elements which insulate against structure-borne sound.

Abstract: A guide control rod for a wheel suspension arrangement of motor vehicles. The guide control rod includes spaced side walls extending in a longitudinal direction with guide sockets being positioned in an area of the respective ends of the guide control rods. Each side wall is formed by a single stamped or pressed plate element. The guide sockets are formed by collar portions which define mounting openings extending through the respective side walls. The collar portions have different diameters so as to enable the collar portions of the respective plate members to be pressed onto one another, thereby connecting the two plate members to each other.

Abstract: A drive control device for a motor vehicle with rear axle drive and equipped with an anti-blocking system. As part of a rotational speed sensor arrangement provided to determine the state of movement of the vehicle wheels, each of the non-driving front wheels has an associated rotational speed sensor and the two rear wheels have a common rotational speed sensor, which measures the rotational speed of the propeller shaft in the transmission system. A hydraulic actuator provided for brake pressure control corresponds in construction to that of a 4 channel anti-blocking system. These components are utilized for both the drive control and the anti-blocking control. An electronic control system of the drive control device, which processes the output signals of the rotational speed sensors, initially activates the right-hand rear wheel brake, as soon as a driving wheel starts to spin.

Abstract: A mounting arrangement for a transparent windowpane guided displaceably in height inside of a hollow body space of a motor vehicle by guide members. The mounting support is provided at least on the side thereof facing the transparent pane with a curved surface, against which abuts a bearing socket forming a separator with respect to the transparent pane. A fastening element connecting the bearing socket with the mounting support is so arranged and constructed that the fastening element, in the loosened condition, can be displaced, respectively, pivoted together with the bearing socket.

Abstract: A bumper for a motor vehicle, with the bumper being equipped with an energy absorber provided along a rear surface thereof with at least one recess. The energy absorber is disposed forwardly of a girder subjected to bending, with the girder being attached to a vehicle. The recesses are arranged in such a manner that an impact force is transmitted to the body of the motor vehicle with as little moment as possible so as to prevent a tilting of the bumper and associated motor vehicle parts such as a fender of the vehicle. With a bumper girder subjected to bending being mounted forwardly of the energy absorber, at least portions of the recesses diagonally face the area of incidence of the impact force. If the impact is directly incident on the energy absorber, the recesses lie in an extension of a direction of the point of application of the impact forces.

Abstract: A gas cushion on the passenger side for motor vehicles, especially for passenger motor vehicles, includes two mutually oppositely disposed approximately trapezoidally shaped surface or boundary areas. The unique shape of the cushion provides a particularly safe protection effect in the critical upper impact area without increase of the overall volume of the gas cushion. One of the trapezoidally shaped boundary areas serves as impact surface facing the passenger while the other trapezoidally shaped boundary area includes at least one opening serving the gas admission. The gas cushion is so arranged in the motor vehicle that the trapezoidally shaped boundary areas taper from top to bottom.

Abstract: To largely prevent bodily injury to a pedestrian or cyclist involved in a collision with a passenger motor vehicle with an impact in a headlight area of the vehicle, the headlights are flexibly disposed. For this purpose, a diffusing lens for the headlights is provided with a rearwardly slanted cover plate above a light exit area of the diffusing lens. The cover plate forms a part of the outer contour or shape of the vehicle and essentially maintains the original shape upon an impact load. The cover plate has a length corresponding at least to approximately a half of a height of the light exit area, with a free end of the cover plate being elastically supported by a fixed component of the vehicle.

Abstract: An axle arrangement, especially for a rear axle passenger motor vehicles, with the vehicles including independent suspended wheels. The axle arrangement includes a wheel guide having an upper and lower split link for a wheel carrier. An instantaneous center located, in a rear view of the axle arrangement, a longitudinally extending center point of the vehicle is determined through the upper and lower links of the wheel guide. The instantaneous center travels out of the longitudinal center plane of the vehicle toward one side of the vehicle during a cornering. The links are constructed and arranged such that the instantaneous center shifts toward an inside of a curve during a cornering of the motor vehicle.

Abstract: A supporting body for wheel guide members of motor vehicle wheels, especially rear wheels. The supporting body is adapted to be fastened to the vehicle body in end areas thereof by way of at least one elastic element. The supporting body is formed of two stamped or pressed sheet metal members, with each of the members being flat at one end and shell-shaped at the opposite end. The two sheet metal members are joined together in such a manner that in each case the flat end portion of one sheet metal member covers the shell-shaped portion of the opposite sheet metal member.

Abstract: A passenger motor vehicle provided with side windows and a convergent roof having a width narrower than a distance between side walls of the vehicle. Each of the side windows includes a first area disposed adjacent to the roof and corner posts, with the first area being inclined relative to other areas of the window. The first window areas are sharply sloped or inclined toward the roof and corner posts with the other areas of the side windows being at most slightly inclined or sloped inward towards the vertical.

Abstract: A web seam for sheet metal parts and a process for producing the same wherein the web seam is provided with a triple layer web projecting from a surface of the sheet metal parts, the layers are formed from a first flange of one sheet metal part and a second flange of the other sheet metal part. The first flange and a portion of the second flange immediately adjoining the other sheet metal part are separately connected by spot welds or by cementing in an intermediate step. The projecting edge of the second flange is then folded over in a U-shape and extends over the first flange. Additional weld spots or cement are applied to the web seam, which weld spots or cement simultaneously cover all three layers. A bight portion joining the first leg and a second leg of the U-shaped flange has a bending diameter which is larger than a single thickness of the sheet metal and, preferably, is twice the sheet metal thickness.

Abstract: A wheel cover, especially for wheels of a passenger motor vehicle, which includes a springy wire ring serving as a mounting element. The ring includes outwardly extending lug-shaped members distributed along its circumference. The lug-shaped members are adapted to engage in an annular recess of the wheel rim for holding the wheel cover to the wheel rim. A guide arrangement is provided on the wheel cover for guiding the lug-shaped members. The lug-shaped members are arranged in such a manner and extend radially outwardly to such an extent, that a connecting line of the points of force application between two adjacent lug-shaped members lies radially outside of the connecting sections of the wire ring extending between the lug-shaped members.

Abstract: A pneumatic central locking system for doors and/or lids in motor vehicles, with a pneumatic operating or locking element being provided for each lock mechanism of the doors and/or lids so as to enable the same to be locked and unlocked. An electrically drivable air pump is connectible with the locking elements by a line system and a selector valve is disposed at an outlet side of the air pump. The selector valve acts upon the line system and/or the locking elements in a desirable manner by means of an additional pneumatic operating or switching element connected fluidically in parallel at the locking elements. A response pressure of the switch element is higher than that of the locking elements. At least one lock mechanism contains a key operable first selector switch, with a second selector switch which may be operated by the switching element.

Abstract: A fluid-friction clutch for a cooling fan of an internal combustion engine, the clutch being fitted on the water-pump shaft which drives the impeller of a water pump for the internal combustion engine and being controlled by an expansion-type thermostat element which is located in a longitudinal bore through the water-pump shaft. Cooling water of the internal combustion engine is applied directly to the expansion-type thermostat element, this water being continuously conveyed through the longitudinal bore in the water-pump shaft by utilizing the pressure-difference created in the cooling water by the impeller of the water pump. In order to cool both the working chamber of the fluid-friction clutch and the clutch-bearing, a cooling line is arranged inside the working chamber and connected to the cooling-water circulation inside the longitudinal bore through the water-pump shaft.

Abstract: A door lock illuminating system disposed in a handle of a door, and, in particular, a door of a motor vehicle. The illuminating system being switchable by circuit elements connected to the handle, the handle is constructed as a unilaterally pivotable pull handle and a light emitting arrangement is disposed in such a fashion so as to be exposed only when the pull handle is pulled to an operative position. Electrical contacts are disposed in such a manner that with the pull handle being pulled to the operative position the electrical circuit of the illuminating system is completed.