Abstract: A thread cutting drill tool for metal cutting includes a cutting section having an axially extending chip flute and land, and a plurality of axially spaced teeth. Each tooth has an axially forward facing front flank and an axially rearward facing rear flank, a radially outward facing crest connecting the front flank and the rear flank, and a cutting edge. The cutting edge includes a set of crest cutting edges, each crest cutting edge being formed by an intersection of the crest of one tooth with the chip flute. The cutting edges include a set of front finishing edges and a set of rear finishing edges. Each front finishing edge is formed by an intersection of the front flank of one tooth with the chip flute. Each rear finishing edge is formed by an intersection of the rear flank of a tooth with the chip flute.

Abstract: A method for ascertaining a setpoint value for a manipulated variable for the actuation of a low-pressure pump in a fuel-supply system for an internal combustion engine having a high-pressure accumulator and a high-pressure pump, the high-pressure pump being operated in a full delivery mode, and the low-pressure pump being actuated so that a pressure provided by the low-pressure pump is reduced, and the setpoint value at which a dip in a delivery quantity of the high-pressure pump is detected is ascertained while taking into account an actuation value of the manipulated variable.

Abstract: A method for ascertaining a setpoint value for a manipulated variable for the actuation of a low-pressure pump in a fuel-supply system for an internal combustion engine having a high-pressure accumulator and a high-pressure pump, the high-pressure pump being operated in a full delivery mode, and the low-pressure pump being actuated so that a pressure provided by the low-pressure pump is reduced, and the setpoint value at which a dip in a delivery quantity of the high-pressure pump is detected is ascertained while taking into account an actuation value of the manipulated variable.

Abstract: A method and control unit for a start of an Otto engine operated at low temperatures, using ethanol and/or gasoline, having direct injection. The method includes generating by a high pressure pump a fuel pressure in a high pressure system connected to a high pressure reservoir; a sensor monitoring the fuel pressure in the reservoir and the system; injecting the fuel, by an injector, from the reservoir into a cylinder of the engine, the fuel pressure, an injection quantity and a fuel quantity being specified by a control unit based on, sensor the fuel pressure being specified based on the operating point of the engine up to an upper pressure which is below a starting pressure to which the fuel is increased before the fuel injection, and the fuel pressure in the reservoir and the system being limited to a maximum by an opening pressure of a limiting valve.

Abstract: A method for starting an internal combustion engine in which fuel is injected directly into the combustion chamber using a multiple injection before an initial ignition of a fuel/air mixture, the fuel being injected directly into the combustion chamber during an intake stroke using a first injection and using a second multiple injection, the fuel being injected directly into the combustion chamber during a compression stroke.

Abstract: A method and control unit for a start of an Otto engine operated at low temperatures, using ethanol and/or gasoline, having direct injection. The method includes generating by a high pressure pump a fuel pressure in a high pressure system connected to a high pressure reservoir; a sensor monitoring the fuel pressure in the reservoir and the system; injecting the fuel, by an injector, from the reservoir into a cylinder of the engine, the fuel pressure, an injection quantity and a fuel quantity being specified by a control unit based on, sensor the fuel pressure being specified based on the operating point of the engine up to an upper pressure which is below a starting pressure to which the fuel is increased before the fuel injection, and the fuel pressure in the reservoir and the system being limited to a maximum by an opening pressure of a limiting valve.

Abstract: A method for operating an inductive load, which is operated in a motor vehicle with electric voltages of different magnitudes, is provided, a current rise in the inductive load being influenced by selecting pulse lengths and pulse pauses of the electric voltage.

Abstract: The present invention relates to a thread cutting tool with a shank and a cutting part, the cutting part having several cutting lands (3) with interjacent flutes and the cutting lands (3) having a starting taper (3a) and a guide part adjoining same. In order to produce a thread cutting tool with the features named at the outset which experiences less wear and must be reground less often than conventional threadd cutting tools of the type described previously, it is proposed according to the invention that the cutting teeth (5) have a chamfer (6) or rounded area (7) at their corners.

Abstract: A thread cutting tool for cutting female threads includes a shaft and a cutting section composed of several groups of cutting teeth alternating with chip grooves. At least some of the teeth, preferably teeth disposed in a front region of the tool, have undercuts in their flanks which define radial steps, each step spaced circumferentially from a cutting edge of the respective tooth in order to form a space which facilitates the escape of cuttings.

Abstract: A method for operating an inductive load, which is operated in a motor vehicle with electric voltages of different magnitudes, is provided, a current rise in the inductive load being influenced by selecting pulse lengths and pulse pauses of the electric voltage.

Abstract: A screw-tap includes at least two cutting lands with respective cutting edges. The cutting edges have, at least in a starting taper region thereof, a chamfer with a negative angle that reduces a rake angle of the cutting edges. An angle of the chamfer to a plane oriented perpendicular to a surface produced in a workpiece has a value in a range of ?10° and ?60°. A width of the chamfer is between 0.05 and 0.75 times a depth of profile.

Abstract: The valve (10) has a seat valve (27) comprising a hollow cone-shaped valve seat (24) and an hemispherical shutoff element (26). An afflux bore (23) having contact with a pressure-medium inlet (19) discharges centrically into the valve seat (24). A solenoid armature (30) acting upon the seat valve (27) in opening fashion grips a push rod (25) comprising the shutoff element (26). The solenoid armature cooperates with a pole body (42) according to the flat-type armature principle. A preloaded return spring (39) acting on the seat valve (27) in closing fashion is arranged between the pole body (42) and the solenoid armature (30).

Abstract: A thread cutting tool for cutting female threads includes a shaft and a cutting section composed of several groups of cutting teeth alternating with chip grooves. At least some of the teeth, preferably teeth disposed in a front region of the tool, have undercuts in their flanks which define radial steps, each step spaced circumferentially from a cutting edge of the respective tooth in order to form a space which facilitates the escape of cuttings.

Abstract: The valve (10) has a seat valve (27) comprising a hollow cone-shaped valve seat (24) and an hemispherical shutoff element (26). An afflux bore (23) having contact with a pressure-medium inlet (19) discharges centrically into the valve seat (24). A solenoid armature (30) acting upon the seat valve (27) in opening fashion grips a push rod (25) comprising the shutoff element (26), which said solenoid armature cooperates with a pole body (42) according to the flat-type armature principle. A preloaded return spring (39) acting on the seat valve (27) in closing fashion is arranged between the pole body (42) and the solenoid armature (30).

Abstract: The vibration damper has a sleevelike shaped part comprising an elastomer as a diaphragm. The shaped part is received tightly on the opening end of a bore of a housing and surrounds an extension of a support body disposed in the bore. Provided on a side face of the extension is a groove, which communicates with a chamber in the extension. The shaped part, which on its outside is exposed to the brake fluid, with the inside of its jacket wall defines a hollow chamber, formed toward the extension of the support body and having atmospheric pressure. The vibration damper can be used in a slip-controlled hydraulic brake systems of motor vehicles.

Abstract: The invention relates to an electromagnetically actuated, controllable valve with first and second valve stages, of which the first stage is actuated by an armature and the second stage functions automatically. An opening cross-section of the first valve stage is small and an opening cross-section of the second valve stage is larger than said opening cross section of said first stage. The first valve stage when in a closed position keeps the second valve stage closed. When the first valve stage opens a spring element opens the second valve stage. The valve according to the invention has an advantage of an only slight actuating force, and the total actuating force is actuatable exclusively to the first valve stage, and the further advantage of a large opening cross-section and hence a low flow resistance.

Abstract: A valve assembly with a housing, a master valve and an auxiliary valve and an armature for the auxiliary valve and an electromagnet is proposed. In previous valve assemblies, in which the auxiliary valve, openable via the armature, serves to open the master valve, a master valve closing element is coupled via an idle stroke arrangement to the armature of the auxiliary valve closing element. If the armature traverses a first partial stroke, then the auxiliary valve is opened; if the armature traverses a further partial stroke, then via the idle stroke arrangement it can lift the master valve closing element from a master valve seat, if hydraulic forces are slight enough. Instead of the idle stroke arrangement, the master valve closing element is given its own armature, which is rigidly joined to the master valve closing element and acts in the opening direction. The valve assembly of the invention can advantageously be used in hydraulic vehicle brake systems that are set up for automatic braking.

Abstract: A solenoid valve having a first seat valve for performing a closing function and a second seat valve, connected in parallel thereto, for a pressure-limiting function. A pressure medium spilled by the second seat valve flows off through a flow-off bore acting as a throttle. Pressure surges are thus largely avoided in the part of the brake system located on the flow-off side. The solenoid valve can be used in controlled-slip hydraulic brake system of motor vehicles.

Abstract: An installation for changing the position of the upper fastening or deflection point, especially of the deflection fitting of a three-point safety belt with automatic belt roll-up mechanism in a two-door passenger motor vehicle without center column, in which the deflection fitting is provided at the upper end of a bearer adapted to be transferred from a lower rest position covered off by the inner vehicle side wall covering, into an upper use position projecting beyond the side wall covering.