Abstract: An apparatus for driving a piezoelectrically controlled fuel injection valve includes a piezoelectric actuator having a discharging device and preferably a power MOSFET switch connected in parallel therewith. The discharging device is turned on by a monitoring device that is likewise connected in parallel with the piezoelectric actuator if an opening time of the piezoelectric actuator exceeds a predetermined monitoring time. The discharging device and the monitoring device are constructed as an integrated circuit (ASIC) and are integrated in a valve housing. A method for operating the apparatus is also provided.

Abstract: The invention relates to a fuel injection pump for internal combustion engines, having a pump piston guided in a cylinder bore of a pump body, which pump piston defines a pump work chamber in the cylinder bore and which is axially driven by a cam drive counter to the force of a restoring spring. Each individual cylinder of the engine to be fed is assigned a fuel injection pump, which is inserted into a bore in the engine housing; at the same time, the engine housing serves as the pump housing. In order to limit frictional wear, which is caused by the back-and-forth motion of the roller tappet of the cam drive guided in the engine housing and to easily replace pump parts, a thin-walled slide bush is disposed between the roller tappet and the housing bore. The slide bush is fastened with radial play on the pump body and additionally prevents the roller tappet from slipping out and prevents the preassembled fuel injection pump from falling apart when it is not installed in the housing bore.

Abstract: A motor vehicle, such as a semi-trailer or the like, has an elongated load-supporting horizontal base frame having a first and a second end portion. A plurality of supporting legs are mounted on the base and pivotable between an upright orientation in which they engage the ground and a substantially horizontal upper retrated orientation. Mounting arrangements mount these legs on the base frame so that they can be shifted transversely of the elongation thereof underneath of the base frame, and laterally outwardly thereof, respectively. A vehicle-mountable chassis frame also has a first end portion and a second end portion; the latter slides under the cooperating first end portion of the base frame when the chassis frame is moved lengthwise beneath the base frame in order to support the latter when the legs are in the retracted position thereof. Guide ramps are provided on one or both of the cooperating end portions of the two frames, to facilitate the movement of the chassis frame underneath the base frame.