Abstract: A photon correlator comprises a plurality of sampling gates 11a-11e which are open during different periods of time; a plurality of memories 12a-12e each provided corresponding to each of the plurality of sampling gates 11a-11e for storing data corresponding to the number of photons; and a data processing control section for reading out the data stored in the memories 12a-12e, and performing a correlation calculation by means of software. The mechanism of the hardware comprising the sampling gates 11a-11e and memories 12a-12e enables high-speed writing of data in the memories and real-time read out of the data. In addition, the software performs correlation calculations in parallel with the above processing. Accordingly, the particle sizes and diffusion coefficient of particles in a fluid can be obtained at high speed under various conditions.

Abstract: A photon correlator comprises a plurality of sampling gates 11a-11e which are open during different periods of time; a plurality of memories 12a-12e each provided corresponding to each of the plurality of sampling gates 11a-11e for storing data corresponding to the number of photons; and a data processing control section for reading out the data stored in the memories 12a-12e, and performing a correlation calculation by means of software. The mechanism of the hardware comprising the sampling gates 11a-11e and memories 12a-12e enables high-speed writing of data in the memories and real-time read out of the data. In addition, the software performs correlation calculations in parallel with the above processing. Accordingly, the particle sizes and diffusion coefficient of particles in a fluid can be obtained at high speed under various conditions.

Abstract: An ignition system for an automobile including a spark circuit, a power supply circuit for supplying power, a switching circuit for supplying power from the power supply circuit to the spark circuit, a distributing circuit for controlling the switching circuit in accordance with a ignition timing signal, and a control circuit for receiving the ignition timing signal and for disabling the distributing circuit for a predetermined period of time in response to a value of the received ignition timing signal.

Abstract: A DC voltage converting device having a choke coil, a switching device, a capacitor for accumulating electric energy, an inhibition setting device for setting and releasing an inhibition of charging, a current detecting device for detecting a charge current of the choke coil, a charge/discharge setting device for setting a discharge of the choke coil, and a driving device for conductively energizing the switching device. Based on this construction, when a capacitor voltage exceeds a predetermined voltage, only a time for interrupting the charge is extended.

Abstract: A rotary stand (11) having a half-mirror (8) and a photodetector (10) mounted thereon, is continuously rotated around a first rotary shaft (A) passing through a sample (S), and set to a predetermined scattering angle. Simultaneously, a rotary reflecting mirror (7) is rotated at a predetermined angle to direct a reference li8ght (LR) to the half-mirror (8) at all times. The half-mirror (8) is also rotated at its own axis at a predetermined angle so that the direction of a scattering light (LS) at the light emitting side of the half-mirror (8) is identical with the direction of the reference lilght (LR). Accordingly, the reference light may be composed with the scattered light at an arbitrary scattering angle, enabling observation of the Doppler shift in the scattered light direction (FIG. 1).

Abstract: An ignition system is disclosed in which secondary windings of a first and a second ignition coil are connected in parallel to a spark electrode of an internal combustion engine. A d.c. high voltage is alternately fed to the primary windings of the first and the second ignition coil. When an integrated value of a current flow through the first (the second) ignition coil reaches a first reference value, this primary coil is disconnected from a feed bus, and instead the primary winding of the second (the first) ignition coil is connected to the bus. When a short-circuit occurs in one of the ignition coils, only the other ignition coil conducts repeatedly, and accordingly the switching of the energization takes place whenever the current flow through the first (the second) ignition coil reaches a second reference value.

Abstract: An ignition system for generating multiple ignitions during a spark interval of an engine cylinder. For controlling an energy of each one of the multiple ignitions, a ramp signal which linearly rises from an initial peak value of a primary charge current for each one of the multiple ignitions of a primary winding of the ignition coil is compared with a preset value and a charge of the primary winding for each one of the multiple ignitions is stopped when the ramp signal exceeds the preset value. After a predetermined time, a primary charge current is supplied again to the primary winding until the ramp signal exceeds the preset value.

Abstract: An ignition device for an engine is removable without removing the cylinder head cover, for gaining access to the spark plug. A case has a lower portion releasibly fitted around a spark plug mounted to a cylinder head of the engine. First and second bobbins having coils wound thereon are mounted concentrically in the case and a C-shaped core is positioned outside of the case and has distal ends fitted in the bobbins. An ignition head cover removably mounted to the cylinder head cover of the engine supports the core when the lower portion of the case is fitted around a spark plug.

Abstract: A motor-driven flow rate control valve device which includes a housing, a valve, a valve shaft, a return spring and a step motor. The housing has its inlet and outlet. The valve is disposed in a passage formed in the housing and is capable of keeping communication between the inlet and the outlet under control by its opening and closing action. The valve shaft is axially slidable in the housing and has a first end thereof linked to the valve. The return spring is held by a holder which includes a first end thereof secured to the housing and a second end thereof secured to a second end of the valve shaft. The return spring constantly forces the valve to move in a valve closing direction. The step motor is fixed through a motor housing to the housing and subsumes a rotor equipped with a screw mechanism for converting a rotary motion of the step motor into an axial motion of the motor shaft. One end of the motor shaft impinges upon the second end of the valve shaft.

Abstract: An apparatus for controlling the air-fuel ratio for an internal combustion engine and which includes a flame sensor provided in the vicinity of a spark plug within an engine combustion chamber, an air induction passage for bypassing a throttle valve of a carburetor, an electromagnetic valve disposed in the air induction passage to control an amount of air flowing through the air induction passage, and an electronic control unit actuating the electromagnetic valve by means of input electric signals from the flame sensor and including a control MAP based on a mutual relation between an air-fuel ratio and a time of firing.

Abstract: An electrically actuated EGR valve controls the recirculation of exhaust gases in an internal combustion engine. The EGR valve includes a step motor having a linearly moving motor shaft engaging a rod of a poppet valve for communicating an exhaust gas inlet port with an exhaust gas outlet port. An insulator and a cooling atmosphere chamber separate the step motor from the heat of the exhaust gases.

Abstract: A turbocharger control device for use in conjunction with an internal combustion engine includes a turbine driven by exhaust gases; a compressor connected with the turbine by having a shaft having a hole through the diameter; a photo projector and photo receiver facing each other across the shaft at the location of the through-hole for generating a light pulse signal proportional to the rate of rotation of the shaft; a photo-voltage converter connected optically with the photo receiver for converting the light pulse signal to an electrical pulse signal; an engine control unit connected electrically with the converter for generating a control signal in response to the electrical signal; an actuator connected with the engine control unit for movement in response to the control signal; an exhaust gas bypass passage connected between upstream and downstream portions of the turbine; and a bypass valve operatively connected to the actuator and associated with the bypass passage for controlling the flow through the

Abstract: An electromagnetic control valve used in an internal combustion engine and which includes a motor having a solenoid coil and a center core, a valve body having an inlet port and outlet ports, a pair of yokes connecting the motor and the valve body, a valve rotor having a shaft, a bushing and a plurality of bores, a rotatable permanent magnet arranged at one end of the valve rotor, a torsion spring arranged at the other end of the valve rotor, and a bearing member for rotatably holding the valve rotor and having openings formed therein.

Abstract: A mounting device for a spiral spring which includes a rotatable shaft, a casing having a wall through which a first end of said rotatable shaft extends, a spiral spring for biasing the rotatable shaft in one direction, the spiral spring having an inner end which is engaged with the first end of the rotatable shaft, a spring holder positioned within the casing and having a first projection extending therefrom with which an outer end of the spiral spring is engaged, and a cover fitted within the casing covering the spiral spring and engaging with the spring holder so as to be rotated therewith and for thereby adjusting the biasing force of the spiral spring.

Abstract: A linear motor-actuated flow control valve includes: a casing having an inlet port and an outlet port; a moving-coil linear motor disposed within said casing, said linear motor including a hollow, ferromagnetic core which delimits the interior of said casing into valve chambers and which has a valve hole or holes for communicating said inlet and outlet ports with each other, a bobbin slidably disposed on said core for controlling the opening degree of the valve hole(s), an electromagnetic coil wound on said bobbin, a permanent magnet so arranged that the magnetic flux produced thereby extends axially of said electromagnetic coil, and a magnetic body for forming a magnetic circuit, in cooperation with said core, for the flux produced by said permanent magnet; and spring for biasing said bobbin so that said bobbin is retained at a predetermined position by said spring means when said electromagnetic coil is in the de-energized state, whereby said valve hole(s) is/are held open or closed to a predetermined degre

Abstract: A turbocharger control system for a vehicle engine which includes a first air passage for supplying air to the vehicle engine, a throttle valve pivotally mounted in the first air passage, a turbocharger having a compressor and a turbine, the compressor being positioned within the first air passage upstream of the throttle valve, a second air passage for connecting a portion of the first passage downstream of the compressor and a portion of the first passage upstream of the compressor, a valve device positioned within the second air passage for relieving fluid pressure from the downstream portion of the first air passage to the upstream of the first air passage, a throttle sensor operatively associated with the throttle valve for detecting the operating position of the throttle valve and generating signals in response thereto and a computer connected to the valve for receiving the signals generated from the throttle sensor and for delivering the signals to the valve to operate the valve in response to the posi

Abstract: A solenoid actuated valve device for electrically controlling the flow of fluid includes a body having an inlet port and an outlet port, a hollow core positioned within the body and having first and second axially spaced openings which provide fluid communication between said inlet and outlet ports and a cover member secured to one end of the body so that the core is supported by the body and the cover member for axial adjustment movement relative thereto. A bobbin is slidably mounted on the core and is provided with a valve portion for controlling the effective area of the first and second openings. A solenoid coil is provided for shifting the value in opposite directions. In the absence of electric current to the coil first and second springs maintain the bobbin in a position so that the valve portion thereof is located between the first and second openings in the coil so that one opening will be completely open and the other will be completely closed.

Abstract: A linear motor-actuated flow control valve includes spring means for biasing a bobbin controlling valve hole opening degree in mutually opposing directions, to hold the bobbin at a middle opened position when an electromagnetic coil wound on the bobbin is deenergized. The bobbin is driven against spring means force in any opposing directions to increase or decrease the opening degree by applying a positive or negative energizing current to the coil.

Abstract: A control valve assembly of the type in which a slide valve is driven along a hollow iron core by a linear motor to control the degree of communication between an inlet port and outlet port through the hollow interior of the iron core. A valve hole is provided in the slide valve so as to overlap a communicating hole formed in the iron core. When the linear motor is in the de-energized state the slide valve is retained by springs at a position that permits the valve hole to overlap the communicating hole to a predetermined extent. The linear motor upon being energized drives the slide valve against the springs so that the valve hole increases the opening degree of the communicating hole with an increase in the energizing current. Instead of providing the valve hole in the slide valve, a larger, second communicating hole may be formed in the iron core, this second hole being fully closed and the other communicating hole fully opened by the slide valve when the linear motor is de-energized.

Abstract: An apparatus for controlling the proportion of air and fuel in the air-fuel mixture of the internal combustion engine includes a carburetor having a main system fuel tube, a main system air-bleeding passage, a slow system fuel tube and a slow system air-bleeding passage, and a proportional control solenoid valve including an air-inlet port, a first outlet port communicating with the main system air-bleeding passage, a second outlet port communicating with the slow system air-bleeding passage and a moving-coil linear motor incorporated therein, wherein the proportional control solenoid valve is adapted to supply air to the main system air-bleeding passage and the slow system air-bleeding passage at a flow rate proportional to the level of the intensity of an electric current supplied to the moving-coil linear motor when the intensity of the electric current lies within a range between two predetermined values Imin and Imax.