Abstract: A frequency multiplying device which multiplies the frequency of an externally-supplied reference signal PREF includes a digitally-controlled oscillation circuit, which includes a ring oscillator formed of thirty-two inverting circuits in a ring configuration which are adapted to generate sixteen clock signals having a period that is thirty-two times the inversion time of each inverting circuit and a phase interval that is twice the inverting circuit inversion time, and produces an output signal POUT having a period that corresponds to frequency control data CD at a resolution of the phase difference time of the clock signals, a counter/data-latch circuit which counts the clock signal RCK released by the ring oscillator within one period of the reference signal PREF and delivers the frequency control data CD of the count value to the digital oscillation circuit, and a control circuit which controls the operation of the circuits so that the oscillation output signal POUT having the frequency of the reference s

Abstract: A data receiving unit includes a data receiving circuit for receiving, through a transmission path, transmission data which has been encoded into a predetermined transmission code by using a predetermined transmission clock signal and includes a reference pulse having a pulse width corresponding to a period of the transmission clock signal, a clock for generating a received clock signal in synchronization with the transmission data, and a data decoding circuit for decoding the transmission data received by the data receiving circuit using the received clock signal generated by the clock, where the clock includes an oscillator generating at least a reference clock having a period which is shorter than that of the transmission clock signal, a counter circuit counting an interval between points of change of the transmission data received by the data receiving circuit according to the reference clock signal, a reference pulse detector circuit for detecting the reference pulse on the basis of a count value from th

Abstract: An air-fuel ratio control apparatus for an internal combustion engine is provided which includes an air-fuel ratio determining circuit which determines an air-fuel ratio of exhaust gases flowing upstream of a catalytic converter for controlling the air-fuel ratio of the exhaust gases so as to agree with a target air-fuel ratio under feedback control, a sorbed substance amount determining circuit for determining the amount of substances sorbed in the catalytic converter, and a target air-fuel ratio determining circuit for determining said target air-fuel ratio so that the amount of substances determined by said sorbed substance amount determining means falls within a given range.

Abstract: A SOI semiconductor integrate circuit device, which can protect against surges between a signal-input terminal and power-supply input terminal thereof to obtain an improved electrostatic withstand quantity, is disclosed. An inverter circuit which is an integrated circuit is formed in a thin-film semiconductor layer formed through an insulation film on a p-type silicon substrate. An n-type diode diffusion region, resistor diffusion region, and FET diffusion region are formed within the silicon substrate. An input portion of the inverter circuit is connected through the resistor diffusion region to a signal-input terminal IN. A power-supply input terminal VC is connected to a ground terminal GND through a reverse-biased diode D formed by the diode diffusion region. When surge is applied to the signal-input terminal IN, a parasitic diode DD composed by the resistor diffusion region and silicon substrate exhibits avalanche breakdown and surge voltage is bypassed.

Abstract: An oxygen concentration sensor according to the present invention, which can introduce a large amount of air into the atmospheric chamber easily and can sustain stable detecting characteristics for a long time, includes a sensor element having a first end exposed to measured gas and a second end exposed to atmospheric gas, a cover for covering the second end of the sensor element; and a water repellent member disposed in the cover. In the cover, a space is formed to introduce atmospheric gas therethrough to the sensor element. The cover further includes an outer ventilation hole to introduce atmospheric gas into the space. The water repellent member divides the space into an inner space and an outer space between the sensor element and the outer ventilation hole. Each cross-sectional area of air passages in the inner space and the outer space is larger than that of the air passage of the outer ventilation hole.

Abstract: A cover for a fuel tank opening is molded with insulating resin and a plurality of terminal pins is directly inserted thereinto. A lower housing portion, made of conductive resin and containing a fuel filter element, is weld-connected to the fuel tank side of the cover. A fuel pump is held under the cover. When electricity is supplied to the fuel pump via an electric connector, fuel is discharged from the fuel pump and this discharged fuel is filtered by a fuel filter. Static electricity generated in the fuel filter dissipates through the lower housing portion made of conductive resin. This construction enables suppression of electrostatic voltage generated in the fuel filter. Moreover, a plurality of connector terminals are directly inserted into the upper housing cover portion of the fuel filter housing at the time of molding, which can therefore supply electric power to the fuel pump with a simplified construction.

Abstract: A divider constituted by connecting in series a plurality of arithmetic units in such a manner as to correspond to the number of bits of first data, said divider comprising: a divisor data input unit for inputting a complement of 2 of divisor data in division as said first data signal lines for sending dividend data and said addition result data calculated by said arithmetic unit on the basis of said dividend data and selected by said selector of said arithmetic unit or said carry output data from said arithmetic unit of the most significant bit among said arithmetic units for effecting the arithmetic operation using said second data, as said second data; and an AND circuit for calculating a logical product between a logical product for each bit of said divisor data and said carry output data sent from said signal line, and supplying said logical product as said select signal to said selector.

Abstract: In a fuel supply system employing a returnless fuel pipe arrangement, a relief valve is provided at a discharge side of a fuel pump. The relief valve is opened when fuel pressure in the fuel pipe arrangement becomes no less than a system protective pressure, so as to relieve the fuel pressure to protect the system. The relief valve is also arranged to be open when the fuel pressure in the fuel pipe arrangement becomes higher than a target fuel pressure by a predetermined value or when the fuel cut is performed. Thus, the fuel pressure in the fuel pipe arrangement is lowered. Thereafter, when the fuel pressure in the fuel pipe arrangement is lowered to a pressure near the target fuel pressure, the relief valve is arranged to be closed so that the fuel pressure in the fuel pipe arrangement is held substantially at the target fuel pressure.

Abstract: A head-up display device includes a display unit for emitting display light corresponding to images of control switches, and an optical reflector for reflecting display light. A windshield or a combiner installed on the windshield reflects the image before creating a display image in front of the windshield. The head-up display device has touch sensors on control switches mounted inside a vehicle. When these touch sensors detect user contact on a control switch, the display unit displays the touched control switch and related switches together with highlighting the same control switch in comparison with its related switches.

Abstract: A fuel supply system is installed inside a fuel tank as part of a cover closing an opening of the fuel tank. The fuel filter is integrally fixed to the cover and a fuel pump is mounted via the fuel filter. The fuel filter is in the shape of a partial annulus disposed in a certain angular range. Such system parts as a pressure regulator, an electric connector, a fuel level gauge and a fuel pipe are contained in the remaining angular range of the fuel pump periphery where the fuel filter is not disposed.

Abstract: A transistor T26, serving as an output circuit 42, has a collector connected to a communication line B+ and an emitter connected to the other communication line B-. A base current generation circuit 44 generates a base current Ib for actuating transistor T26 based on a transmission signal. Transistors T24 and T25 constitute a current-mirror circuit. A correction circuit 46 takes in or absorbs a current equivalent to base current Ib from the collector of transistor T26, so as to equalize the drive currents IB+ and IB- flowing through twin communication lines B+ and B-. Since only one transistor T26 is used to actuate the twin communication lines B+ and B-, it, becomes possible to completely equalize the drive currents IB+ and IB- in their absolute values and to cause no phase dislocation between these two drive currents IB+ and IB-. Hence, the radio noises can be completely canceled when generated from each of twin communication lines B+ and B- due to change of currents flowing therethrough.

Abstract: An automotive air conditioner which conditions air making use of radiation of heat of a condenser and absorption of heat of an evaporator effectively. The evaporator 207 and the condenser 203 are disposed in a duct 100. A bypass passageway 150 is provided sidewardly of the condenser 203 in the duct 100, and a flow rate of air bypassing the condenser 203 is controlled by pivotal motion of an air mixing damper 154. Another bypass passage is provided sidewardly of the evaporator 207 in the duct 100, and a flow rate of air bypassing the evaporator 207 is controlled by pivotal motion of a bypass damper 159. Air is conditioned to an optimum blown out air temperature by varying the cooling rate at the evaporator 207 and the heating rate at the condenser 203 and is blown out to a room of an automobile from spit holes 141, 142 and 143.

Abstract: A method of producing a holographic optical element which is capable of imparting complex corrections to the holographic optical element and of effecting the exposure using a short optical path permitting little disturbance to be infiltrated. A correction holographic optical element 13 for correcting the characteristics of the holographic optical element is disposed in at least one of the optical paths of an object beam 35 and a reference beam 36 that fall on a photosensitive material 11. The object beam 35 may be one obtained by reflecting the reference beam 36 by a reflection-type holographic optical element such as a reflection-type master holographic optical element 12. In the case of a holographic optical element used for the head-up display, the correction holographic optical element 13 may be given characteristics for correcting the curvature of the windshield or characteristics for correcting color aberration.

Abstract: Rectifying elements that constitute a full-wave rectifier of an on-vehicle alternator are constituted by Schottky barrier diodes. The Schottky barrier diode has on one hand the drawback that rectifying characteristics thereof deteriorate due to the heat generation resulting from large avalanche breakdown current that is produced due to surge voltage, with the result that leakage current that occurs when reverse voltage is applied increases. However, according to the present invention, since the surge voltage is absorbed by a voltage regulation diode connected in parallel with the Schottky barrier diode, the voltage regulation diode is broken down when surge voltage has been applied. Accordingly, it does not happen that reverse voltage that exceeds the breakdown voltage of the voltage regulation diode is applied to the Schottky barrier diode. Therefore, it does not happen that the current due to surge voltage exceeding the breakdown voltage thereof flows in the Schottky barrier diode.

Abstract: An oxygen sensor has a detecting device unit for outputting a sensor current such as a limiting current of which a value is constant even though a sensing voltage applied to the oxygen sensor changes in a limiting current generating region and corresponds to an air-fuel ratio of a combustion gas and a heater for heating the detecting device unit to keep a resistance of the detecting device unit even though the oxygen sensor is degraded. When the sensing voltage is changed to a second sensing voltage of a resistance governing region, a current peak occurs in the sensor current, and a peak current value is detected. Because the peak current value decreases as the oxygen sensor is gradually degraded, when the peak current value is lower than a degradation judging value, it is judged that the oxygen sensor is degraded. Therefore, the diagnosis of the degradation of the oxygen sensor can be performed with a high accuracy.

Abstract: In an on-vehicle alternator, both the magnetic flux variation frequency and maximum flux density are decreased sufficiently to thereby decrease the internal iron loss and thereby realize an increase in the current generation efficiency. The on-vehicle alternator comprises a rotor wherein magnetic pole cores that are polarized by a rotor coil to alternately different polarities are circumferentially disposed on the outer periphery thereof at prescribed equi-angular intervals. A permanent magnet which is embedded within a resin-made retainer body is provided between the magnetic pole cores and has side faces, as viewed circumferentially, which are polarized respectively to the same polarities as those of adjacent respective magnetic pole cores to thereby vary the magnetic flux quantity directed toward stator coils so as to exhibit a circumferential gentle curve.

Abstract: A heating apparatus of a re-heat type for an air conditioning system for a vehicle provided with an internal combustion engine. The heating apparatus includes a flow control valve for controlling an amount of an engine hot water directed to a heat exchanger for heating. When the degree of the opening of the flow control valve is 2/8 or less and when the target degree of the opening of the flow control valve is 2/8 or more, a control of the degree of the opening of the flow control valve to the target opening plus a predetermined overshoot amount is initially executed, which is followed by a control to the target opening. When both of the initial and target opening is larger than 2/8 or the initial and target opening are identical, the overshoot control is not carried out, i.e., the degree of the opening of the flow control valve is directly controlled to the target value.

Abstract: Method of driving a matrix-addressed electroluminescent device without deteriorating it. A display data driving voltage is applied to the column electrodes. A line scanning driving voltage is applied to the row electrodes successively. Before the display data driving voltage ceases, the line scanning driving voltage applied to the row electrode acting as a common electrode for all electroluminescent cells in one column is turned off. Thus, these cells are deactivated almost simultaneously. Electric charges remaining on the electro-luminescent cells in this row do not induce spike voltages on other electroluminescent cells. Therefore, deterioration of the electroluminescent cells is prevented. Electric charges produced when the row electrode-driving voltage is turned off flow directly into a power supply for the row electrodes. This power supply is designed to absorb the flowing charges. The potential is prevented from exceeding the power voltage.

Abstract: A rotor for an electric rotary machine having an armature core, upper layer coil elements and lower layer coil elements is provided. Each coil element has a straight coil side and a pair of coil ends extending radially at a right angle from the coil side. Each coil end is inclined by a predetermined angle with respect to the coil side in a circumferential direction of the armature core. The lower layer coil side and the upper layer coil side are inserted into corresponding slots in a radial direction. A connector comprising a tip of the coil end of the upper layer coil element and a connector comprising a tip of the coil end of the lower layer coil element are welded together.

Abstract: A compact pressure regulating valve makes installation work simple and has a hermetic structure of a stationary value member without a specific seal member. A pressure regulator (201) has a body (203) which includes a fuel inlet (215) and an inner periphery for positioning a stationary valve member (205) in a radial direction. When the movable valve member (208) leaves the stationary valve member (205), the valve opens. Operation of the movable valve member (208) is controlled by a diaphragm which moves to balance the pressure of the pressure chamber (211) and the pressure of a back pressure chamber (213) combined with a biasing pressure of a compression coil spring (214). As a result, the pressure of the pressure chamber (211) can be controlled without a specific sealing member or complex structure. In addition, a pressure regulating valve according to the present invention is compact and easy to install, and has no specific member to seal the stationary valve member.