Abstract: The invention is directed to a pulse generator provided with a connecting member electrically connecting the lead and coil having an entwining section at one end thereof at the portion different from where an end of the coil is fixed, around which wound the middle portion of the coil drawn out to be connected to the lead, whereby a stress added to the drawn out coil is absorbed by the coil twined around the entwined portion, to be prevented from cutoffs of the coil fixed to the one end of the connecting member. A reinforcing member can be applied to the connecting member at an end thereof where the coil is fixed, to reinforce the bending strength of the end portion of the connecting member thereby to prevent cutoffs of the coil. Furthermore, the pulse generator may be provided with a bobbin having a protrusion at the edge of one flange thereof the drawn out coil twining around thereby to maintain the winding strength of the coil to facilitate the following work.

Abstract: A positioning control apparatus comprises a plurality of servo mechanisms corresponding to respective axes, a sequence operation part for successively outputting start commands for the respective servo mechanisms, a positioning operation part for storing a plurality of programs specified in accordance with the start commands and for processing the program in accordance with specified one of the programs to thereby output a positioning control command, and a servo interface for supplying the positioning control command to one of the servo mechanisms to be actuated to start.

Abstract: A control apparatus for an internal combustion engine has a vibration sensor which senses engine vibrations and a low-pass filter which passes a low-frequency component of the output of the vibration sensor. A comparator detects misfiring when the level of the low-frequency component exceeds a prescribed reference level. When misfiring is detected, a microcomputer identifies the misfiring cylinder and stops the supply of fuel to the misfiring cylinder. The control apparatus may also include a knocking suppression device responsive to a component of the output signal of the vibration sensor.

Abstract: An electric discharge machine in which a machining gap or machining area is calculated from the rise time of a pulse voltage applied to the machining gap to stabilize and optimize the marching operation. An abnormal machining conditions such as an arc discharge can be positively detected and avoided. Further, the low surface roughness finish which is impossible to achieve in a large area machining operation can be accomplished.

Abstract: A vehicle power transmission apparatus having an engine starting function is provided which is small in size and has a high degree of freedom and accuracy in controlling torque transmission. The apparatus comprises torque transmitting means including a differential gear mechanism and having at least three (first through third) rotation shafts; an engine operatively connected with the first rotation shaft of the torque transmitting means; a transmission connected with the second rotation shaft for transmitting torque to a drive shaft of the vehicle; an electric motor connected with the third shaft of the torque transmitting means; a power transducer for controlling the electric motor; an electric power source for supplying power to the electric motor through the power transducer; and a controller for controlling the power transducer in such a manner that the electric motor operates as a power source or a load in dependence upon the operating condition of the vehicle.

Abstract: A signal generator generates a crank angle reference signal and a cylinder identification signal in synchronism with the rotation of a multi-cylinder internal combustion engine. The crank angle reference signal has high and low levels which change at a first reference crank position and at a second reference crank position of each cylinder. The cylinder identification signal corresponds to a specific cylinder and is out of phase with respect to the crank angle reference signal. The operating position of each cylinder is determined on the basis of the crank angle reference signal and the cylinder identification signal so that the ignition of each cylinder is controlled based on these signals. The ignition control for the cylinders is stopped if there is an abnormality in the crank angle reference signal or in the cylinder identification signal. This improves reliability and stability in the control of the overall system.

Abstract: A method for manufacturing a stator of a motor having a coil wound on a ring-shaped core having a plurality of slots. The coil is first preformed into a chevron-shape before being mounted on the core so that the chevron-shaped coil comprises front coil end portions positioned within the inner diameter of the core, slot coil portions positioned at the diameter of the slots and having substantially the same configuration as the slots, rear coil end portions positioned between the slot coil portions, and transition coil portions positioned between the front coil end portion and the slot coil portions. This preformed coil is inserted into the core from its end face and the front coil end portions are bent toward the outside of the inner diameter of the core.

Abstract: A fuel injection control apparatus for an internal combustion engine in which the air taken into the intake manifold by a Karman vortex detector. However, the amount of fuel injected is based on a calculated intake volume. The calculated intake volume for a time interval is a weighted sum of the measured volume and the calculated intake volume of the previous period. This overaging amounts for surge storage in the intake manifold and other input paths.

Abstract: A throttle valve control apparatus for an internal combustion engine, which is high in driving safety, enabling the vehicle to cruise in an automatic manner while preventing a run-away condition of the vehicle includes a throttle valve in an intake pipe of the engine fixedly mounted on a valve shaft which is rotatably supported by the intake pipe, and a rotary disk rotatably mounted on the valve shaft and biased by a return spring to rotate relative to the valve shaft in the valve closing direction. The rotary disk is operatively connected with the accelerator pedal so that the rotary disk rotates relative to the valve shaft by operation of the accelerator pedal. A rotation-transmitting mechanism is connected between the rotary disk and the throttle lever for transmitting the rotation of the rotary disk to the throttle lever.

Abstract: An engine speed control apparatus including an air control valve which controls the cross-sectional area of a bypass passage provided so as to bypass the throttle valve of the engine. The apparatus also includes a control unit which controls a degree of opening of the air control valve on the basis of a synthesized quantity which is obtained by synthesizing a basic air quantity for maintaining a target engine speed and an engine speed feed-back correction quantity which effects to eliminate an error between the target speed and an actual engine speed. An atmosphere pressure sensor is used to detect an atmospheric pressure, and a correction circuit is used to ensure that the synthesized quantity corresponds with the detected atmospheric pressure the engine is started.

Abstract: In a planet gear speed-reducing starter in which the rotation of the armature rotary shaft is applied through a planet gear speed-reducing mechanism to the output rotary shaft coupled to the planet gear speed-reducing mechanism, a carrier supporting the planetary gears of the planet gear speed-reducing mechanism is fitted on the rear end portion of the output rotary shaft with its rearward movement limited in such a manner that the output rotary shaft is limited in rearward movement while the carrier is limited in forward movement, and the carrier and the output rotary shaft are slidable with a predetermined torque with each other, whereby the impact occurring therewith is absorbed sufficiently.

Abstract: When, in a wire cut electric discharge machine, the wire electrode is broken during machining, it is automatically connected and returned to the wire electrode break point, and while the wire electrode is moved from the wire electrode break point to the machining start point, a cleaning material is jetted at the machined portion of the workpiece, thereby to allow the wire electrode to quickly return to the wire electrode break point.

Abstract: An electronic control device for motor vehicle comprises, a plurality of sensors for detecting the operation conditions of a motor vehicle, control device for calculating control data for the motor vehicle in view of output signals of the sensors, and for outputting control signals according to the control data, solenoid valve controlled in view of the control signals outputted by the control device, and failure detecting device for monitoring the state of the solenoid valve every predetermined period of time to determine that the solenoid valve and a drive circuit thereof are out of order, when the solenoid valve is held in the same state for a predetermined period of time.

Abstract: There is disclosed a rotational speed control device of an internal combustion engine wherein a variation in torque which is a disturbance is detected in order to control the relation between the flow rate of intake air (or the quantity of fuel injected) and the amount of the electric current produced by an alternator, and to reduce the amount of the electric current produced by the alternator only during a period when an increment in the intake air (or the fuel injection) is delayed, thereby stabilizing the engine speed. Also disclosed is a rotational speed control device according to another embodiment of the present invention.

Abstract: An engine starter apparatus comprising first and second noncircular gears, a pinion, and a starter motor. The pair of noncircular gears is interposed between a crankshaft and a ring gear of an engine, and when the speed of rotation of the first noncircular gear is kept constant, the second noncircular gear rotates the crankshaft while cyclically causing a change in the angular velocity due to its profile. Since the second noncircular gear is positioned so that the change in the angular velocity caused by its rotation can cancel a change in torque of the crankshaft, the change in the torque of the engine are not transmitted to the starter motor, thereby operating the starter motor at constant current at all times, providing such additional advantages as smaller and lighter starter motor design and reduced noise.

Abstract: A cooling water temperature controlling apparatus for an internal combustion engine comprises a butterfly valve placed in a cooling water passage for the internal combustion engine at a position between the inlet port of a radiator and the inlet port of a radiator bypass pipe, and a stepper motor connected to the butterfly valve through a reduction gear having a worm gear wheel so as to adjust a degree of opening of the butterfly valve depending on the temperature of cooling water.

Abstract: A knock control apparatus and method for an internal combustion engine serves to simplify hardware components employed to reduce the load thereon, and hence minimize the cost of manufacture while improving the freedom of control of an engine control unit. Vibrations of a cylinder are sensed to generate a vibration level which is then averaged to provide an average value. A knock determination threshold is generated based on the average value. The vibration level is compared with the threshold for determining whether knock is taking place in the cylinder. When the vibration level exceeds the threshold, engine control parameters are controlled in a direction to suppress knocking in the cylinder. Preferably, the averaging of the vibration level comprises averaging the vibration level to provide a first average value, and averaging the first average value to provide a second average value.

Abstract: An engine starter for an internal combustion engine having an engine ring gear, comprising a pinion gear (8) axially slidable on the rotary shaft (3) between an actuated position in which the pinion gear (8) engages the engine ring gear through the housing opening (6) and an inactuated position in which the pinion disengages from the ring gear. The starter conventionally also comprises a unidirectional clutch (14) for unidirectionally transmitting a rotation of the rotary shaft (3) to the pinion gear (8), and a solenoid switch (18) for energizing the motor (2) and driving the pinion (8) between the actuated and the inactuated positions. A first dust seal ring (22) having a forwardly extending lip (24) between the rotary shaft (3) and the pinion (8) seals therebetween against ingress of any foreign matter. To receive the seal ring (22), the pinion (8) may have an annular cavity (25) or groove so that the lip's inner edge slidably contacts the rotary shaft (3).

Abstract: A Karman vortex generating member is made integral with a sensor portion and supported elastically by a wall of a fluid conduit through a pair of elastic holding members so that externally produced pressure is prevented from being transmitted to the sensor portion.

Abstract: A scroll-type fluid machine has a drive scroll which is rotatably supported by a novel bearing arrangement. The bearing arrangement includes a bearing housing which is detachably mounted on a casing of the fluid machine. A journal bearing which rotatably supports a drive shaft of the drive scroll is secured inside the bearing housing. An oil seal surrounds the drive shaft beneath the bearing, and grease fills the space between the bearing and the oil seal.