Abstract: An electrical discharge machining system is improved by incorporation of an apparatus which permits a machining core to be subdivided into a plurality of sub-cores for separate removal. The invention permits automatic core removal in cases where cores were manually removed in the past, such as where the cores were too large, heavy or irregularly shaped to be handled by the known automatic core disposal apparatus.

Abstract: An internal combustion engine control device having an exhaust gas recycle system which has an exhaust gas recycle line to an air intake pipe, the engine control device comprises at least pressure detect means as one of driving condition detect means for detecting a pressure for calculating an exhaust gas flow rate while said exhaust gas is recycled. A trouble detect means is provided for detecting a trouble in the exhaust gas recycle system on the basis of the pressure value detected by the pressure detect means. An engine control means is provided for controlling the engine speed based on the detected driving conditions by the driving condition detect means and based on an atmospheric pressure calculated from the pressure value detected by the pressure detect member.

Abstract: An AC generator for use in a vehicle which can cool sufficiently a coil portion of a stator coil by means of cooling airs blowing through from a plurality of air suction holes to a plurality of air exhaust holes, the airs being produced by fans provided in a rotor. A stator coil is constructed such that a distance from a front end of the coil to a rear end of the coil is overlapped sufficiently on the distance between the blades of fans in the axial direction thereof.

Abstract: An computer-aided automatic design processing system for designing processes for the machining of parts includes a process design processing section for deciding a machining device, a machining mode, and a machining reference surface based on a parts model of parts to be machined and a data base for production, a forming and verifying section for forming and verifying a process plan based on the output of the process design section processing section, and a fixture processing section. The system is capable of performing the computer processing of a process plan and a fixture plan.

Abstract: An electrode for use in an electric spark machine has recording means integral therewith which stores an electrode information unique to the electrode. The electric spark machine reads the electrode information when the electrode is mounted thereon and stores it in a memory. The electric spark machine operates according to a machining program contained in the electrode information read from the memory while correcting misalignment of the electrode according to misalignment information contained in the electrode information.

Abstract: A numerical control system for controlling a machine tool including a control device for controlling the machine tool; external portable storage device for storing data; a disabling device for disabling device for disabling the control device; a read/write device, operable when the external portable storage device is manually coupled thereto, for reading data from the external portable storage device and for writing data to the external portable storage device; and a determining device for determining whether the external portable storage device is coupled to the read/write device. The disabling device disables the control device when the determining device determines that the external portable storage devices not coupled to the read/write device.

Abstract: An object of the present invention is to provide an engine control device and an engine control method which can detect air quantities charged into the cylinders of the engine without delay, and the fuel injection quantity and ignition timing of the engine can be controlled with high accuracy.

Abstract: A brush unit having a brush, a lead extending from the brush, a metal terminal plate connected to the lead, and a compression spring interposed between the brush and the metal terminal plate. The brush unit is assembled in advance of mounting the brush unit within a blush box. Thereafter, the brush unit is inserted into and held by the brush box through a solder connection between the metal terminal plate and an electrode portion projecting from the brush box. Accordingly, the brush can be easily assembled within the brush box.

Abstract: A method of determining failure of sensors in a control device for an internal combustion engine which comprises steps of setting a predetermined time corresponding to a warmup time of the sensors after an electric power source is activated; determining whether the predetermined time elapses from when the electric power source is activated; determining whether output signals of the sensors are in allowable ranges when the predetermined time elapses; determining the sensors as normal when the output signals of the sensors are in the allowable ranges; and determining the sensors as abnormal when the output signals of the sensors are out of the allowable ranges.

Abstract: An air/fuel ratio sensor is described, comprising an oxygen concentration electrochemical cell and an oxygen pump disposed in a face-to-face relationship with a gap being formed therebetween, the side of said electrochemical cell opposite the side facing said oxygen pump being in contact with the atmosphere, said gap forming a gas diffusion compartment that communicates with a gas to be analyzed by a gas diffusion limiting means, wherein the gap existing between said oxygen concentration electrochemical cell and said oxygen pump has a width of no more than 0.2 mm and no less than 0.01 mm.

Abstract: A method and apparatus of operating a wirecut electrical discharge machine for cutting a workpiece using a generated electrical discharge in a machining gap wherein the workpiece is opposing a wire electrode. The method comprises the steps of presetting a plurality of machining conditions in accordance with dielectric pressure and machined plate thickness combinations, storing the preset machining conditions in a memory, and automatically setting an optimum machining condition based on detected dielectric pressures and the machined plate thickness calculated in a numerical controller. The machined plate thickness may be calculated by dividing an area machining feedrate corresponding to present electrical condition parameters by the actual machining feedrate.

Abstract: An electric discharge machine having a machining solution tank for storing a machining solution containing machining particles, a machining vessel filled with the machining solution to machine a workpiece, and a machining solution circulating system for circulating the machining solution between the machining solution tank and the machining vessel. The vessel has a pair of machining solution jetting devices arranged in the machining vessel in opposition to each other, the machining solution jetting means jets the machining solution delivered thereto, through the machining solution circulating system from the machining solution tank, towards the workpiece in the machining vessel in a predetermined order.

Abstract: A process permitting a work to be machined alternately using two different spindles of a multi-spindle lathe is disclosed. A transfer process by which the work is transferred between spindles is further added to the automatic programming scheme. The automatic programming apparatus accepts the instructions and allows implementation through interpretation of the instructions and processing of data in the instruction and field and/or in a separate storage. Therefore, machining the work using two spindles and transferring the work enabled with a straightforward input that can be easily understood and through the use of a single program. Conventional machining can be effected without the programmer having to be constantly conscious of which head or spindle is being employed.

Abstract: A vehicular AC generator comprising a stator supported by a front bracket and a rear bracket; a rotor fixed to a rotating shaft supported by the front bracket and the rear bracket through bearings, provided with magnetic pole cores wherein a plurality of pairs of magnetic poles are formed in the circumferential direction, retaining an excitation coil; a pair of fans provided at a front end and a rear end of the magnetic pole cores; a plurality of inlet openings provided at end faces of the front bracket and the rear bracket; a plurality of outlet openings provided at peripheral portions of the front bracket and the rear bracket; and fans for cooling inside of the vehicular AC generator by circulating air therein by rotation of the rotor; wherein the fans each is fixed with a side plate at ends of blades thereof and at least in a front side fan of the both fans, a difference between an inner radius of the side plate and an inner radius of the inlet opening of the corresponding front bracket is larger than a wi

Abstract: This invention relates to a trouble diagnosis device for an exhaust gas recirculation (EGR) of an internal combustion engine. In the condition that an EGR control valve is turned on and off according to whether or not the operating condition of the engine is in the EGR control zone, and a trouble diagnosis condition is satisfied, sensors detect a plurality of engine operation conditions. A trouble diagnosis device receives the output detected by one of the sensors and compares the output with a predetermined value of the same kind as the output a normal state of the EGR system corresponding to the engine condition detected by the sensors, thereby the trouble of the EGR control system is diagnosed. Specifically, one of the sensors detects NO.sub.x in exhaust gas or exhaust gas temperature.

Abstract: A data preparing apparatus includes an input device for inputting coordinate data such as a configuration and pattern to be processed and processing conditions, a memory device for converting the coordinate data inputted by the input device into variable coordinate data varying relatively according to the processing conditions and storing the variable coordinate data as a pattern data for processing, a predicting device for predicting a processing information resulting from a processing performed on the basis of the pattern data stored in the memory device and an output device for outputting the processing information obtained by the predicting device. The processing information includes at least one of a processing time, an area to be processed and a processing path. The predicting device calculates a processing time according to a preset processing rate.

Abstract: A flow control valve comprises a fixed iron core, an electromagnetic coil, a casing made of a magnetic substance in which the electromagnetic coil is received, a movable iron core, a return spring for urging the movable iron core in the opposite direction to an attractive force, a flow control valve main body provided with a fluid inlet passage and a fluid outlet passage, a valve provided at the movable iron core, and a valve seat with which the valve is in contact in a non-electric conductive state, wherein at least one of the fluid inlet and outlet passages of the fluid control valve main body is formed to restrict the maximum flow rate of the flow control valve.

Abstract: A stator wedge having a cross section of a dove-tail is disposed at a radially inner side of each of a plurality of slots formed in a ring-shaped core and having a coil inserted therein. Also disclosed is a guide jig for guiding the wedge having the dove-tail cross section into the slots. The guide jig has formed in both side surfaces an edge portion engageable with the wedge.

Abstract: A rotor for an AC generator includes first and second iron cores which function as magnetic poles for the rotor and which are fixed to a shaft. A plurality of magnetic teeth project from the circumference of each iron core at a position where the iron cores contact each other to form troughs between the magnetic teeth. Each trough between the magnetic teeth is V-shaped, so that the weight of the rotor is reduced. Furthermore, each iron core has a ring recess portion at an outer end surface of the iron core and around the axis thereof.

Abstract: A magnetic field correction device for enhancing the homogeneity of a magnetic field generated by a magnet of a magnetic resonance imaging device. The correction device includes a plurality of magnetic shim holders disposed at predetermined circumferential angles on a support cylinder coaxial with the magnet. Each shim holder accommodates a magnetic shim element consisting of a first and a second magnetic bar member of distinct lengths and a first and a second non-magnetic tube for accommodating the first and second magnetic bar members therein. The members are positioned by respective stoppers inserted into the tubes.