Abstract: According to an engine torque control for a drive system including an engine followed by a continuously variable transmission, the engine torque drops quickly when the engine braking forward drive position (L range position) is set after a power demand on the engine has decreased to zero, while it drops less quickly after the power demand has decreased to zero when the normal forward drive position (D range position) is set.

Abstract: A magnetic tape player which includes a tape transport speed selector capable of assuming one of first and second modes during which the magnetic recording tape is transported at a first transport speed and a second transport speed which is 1/n (n being an integer other than 1) of the first transport speed, respectively, a remaining tape length measuring means for measuring a length of time available for recording information to an end of the magnetic recording tape when the magnetic recording tape is transported at the first transport speed, a recording timer for outputting a remaining time signal indicative of the balance between a preset recording time and the length of time actually passed in recording and for outputting a terminating signal necessary to terminate the transport of the magnetic recording tape when the balance becomes zero, and a comparator for comparing the available recording time signal and the remaining time signal with a conversion value during information recording with the magnetic r

Abstract: According to a control for a continuously variable transmission for a motor vehicle, in order to avoid a rapid increase in engine revolution speed upon selecting a power mode from an ordinary mode, the reduction ratio of the continuously variable transmission is varied along a third schedule which connects an ordinary shift schedule for the ordinary mode with a power shift schedule for the power mode. The third schedule is expressed as a funtion of time that has pressed since the instant when the power mode has been selected.

Abstract: A drive system of a piezo-type actuator for use in a motor vehicle, which piezo-type actuator is constructed with a piezoelectric device which is expandable and contractible in accordance with application of a voltage thereto. The drive system includes a voltage-increasing section for increasing an output voltage of a power source mounted on the motor vehicle so as to develop a drive voltage for the piezo-type actuator and a voltage-application section for applying to the piezoelectric device of the piezo-type actuator the drive voltage. Also included in the drive system is an abnormality detection section which is arranged so as to an abnormality of the drive voltage developed by the voltage-increasing section.

Abstract: A two-stage method for polishing the surface of an electrophotographic photoreceptor drum having an inorganic selenic photosensitive layer wherein a first stage rough buffing is conducted by rotating a rough buffing roll about an axis parallel to the rotational axis of the photoreceptor drum, and a second stage polishing is conducted by rotating a finished buffing roll about an axis perpendicular to the rotational axis of the photoreceptor drum.

Abstract: In a fluid controlled automatic transmission for a motor vehicle, a fixed orifice which restricts communication between a low clutch source of line pressure and a friction element which is engaged in forward speeds, is by-passed for a predetermined period following a neutral-to-drive select to allow the friction element to rapidly engage while attenuating selection shock.

Abstract: In order to detect a sensor malfunction, the outputs of two sensors which sense the same operational parameter are both compared with a predetermined value. When the outputs of the sensors fall on either side of the predetermined value the one having the lower value is assumed to be inoperative. The comparison is continually repeated and the operative/inoperative status of the sensors continually updated.

Abstract: A continuously variable transmission comprises a V-belt tensioned between a driver pulley and a follower pulley. Hydraulic fluid pressure that determines a gripping force which the driver pulley grips the V-belt with is reduced upon detecting a demand for engine brake running of a motor vehicle, whereby a good engine brake feel is assured during transient period to the engine brake running.

Abstract: In order to prevent unnecessary variations in reduction ratio during cyclic depression and release of an accelerator pedal, there is provided a non-linear control element in a control unit for varying a reduction ratio of the continuously variable transmission. The non-linear control element provides a hysteresis between an engine power demand variable with the accelerator pedal and the reduction ratio.

Abstract: A control for a continuously variable transmission for quick downshifting to establish an effective engine brake running of an automotive vehicle, comprises a shift actuator, a shift operating mechanism for effecting a shifting in reduction ratio of the continuously variable transmission in response to a change in operating position of the shift actuator, and a control unit for varying a speed at which the shift actuator changes its operating position when a manually operable valve is placed at a L range position and an engine throttle valve is fully closed. More specifically, the shift actuator changes its operating position at a higher speed for quick downshifting to a reduction ratio suitable for an effective engine brake running.

Abstract: An enclosed type lead battery comprises in combination:a cap formed of a synthetic resin, which is integrally formed with anodec and cathodec terminals formed of lead or a lead alloy inserted therein and an exhaust portion to which a safety valve is attached,a plate stack having its ears connected to said terminals, andan enclosure formed of a film or sheet made of a synthetic resin, in which said plate stack is placed, and which is thermally fused at the peripheral edge of its opening to said cap.

Abstract: In a vehicle equipped with an automatic transmission, the controller of the automatic drive system includes an operation signal generating circuit which outputs a signal that indicates the controller itself being in operation, and the controller of the automatic transmission includes a transmission control releasing circuit which releases the normal transmission control upon receipt of the signal from the operation signal generating circuit. The operation signal generating circuit outputs a signal which indicates that the automatic drive system is in operation, and due to releasing the regular transmission control of the automatic transmission, a shift down of the vehicle speed from the over-drive speed is performed only in such a condition in which the vehicle speed is decreasing in spite of the full opening of the throttle valve.

Abstract: The frequency discrimination circuit includes a monostable circuit into which an input signal is fed and a D-type flip-flop connected to the output side of the monostable circuit for generating a frequency discriminated signal. The circuit further includes a time constant modifying circuit for modifying a time constant of the monostable circuit according to the frequency discriminated signal from the D-type flip-flop.

Abstract: A fuel injection arrangement for a diesel engine. An overflow passage for high pressure fuel is provided in the engine's fuel injection pump. A solenoid valve is disposed in the overflow passage for controlling the fuel injection amount through its on-off operation. The time when the fuel injection pump starts injecting fuel is detected by an injection start detector. To this injection starting time point is added a target injection period to determine an injection end time. At this injection end time the solenoid valve is opened to discontinue the fuel injection. The target injection period is determined according to operating conditions of the engine. Since this apparatus detects the actual injection start point and controls the injection period on the basis of the result of the detection, the fuel injection amount can be controlled extremely accurately.

Abstract: A wheel-mounted tire pressure sensor employs a Bourdon tube which deforms in relation to tire pressure to drive a pivotal arm. Opposite ends of the arm support magnets which can close reed switches arrayed around the path of travel of the magnets. The reed switches are connected to passive resonators in such a way that for each of a number of regions of travel of the arm, a unique combination of resonators is activated. The resonators are connected to a wheel-mounted antenna which faces a stationary antenna. Frequency signal matching the frequencies of the resonator are sequentially broadcast by the stationary antenna to the resonators, which are excited to oscillate if activated by the corresponding switch or switches. The excited resonator broadcast their frequencies back to the stationary antenna and to a display unit which decodes the combination of resonator frequencies to display the corresponding tire pressure.

Abstract: An electromagnetic valve which can control a fluid flow in dual mode, i.e. a small amount of fluid at a first step and a large amount of fluid at a second step, which adopts a bypass means of magnetic flux for obtaining the first step and a resistance means that does not allow the magnetic flux to flow in the first step while it allows it to flow in the second step for obtaining the second step.

Abstract: In a diesel engine controlling system having a fuel injection pump, a fuel injection timing adjusting device is controlled by a drive pulse signal whose duty cycle is controlled by a microcomputer. The duty cycle is determined such that a basic duty cycle obtained by using engine rotational speed and injection quantity, is modified or corrected by way of a correction factor and a forecast correction factor. The-first mentioned correction factor comprises an integration component and a proportional component both derived from the difference between a measured fuel injection or ignition timing and a desired or reference fuel injection or ignition timing, which is calculated by using the engine rotational speed and the injection quantity. The forecast correction factor corresponds to a differential value of the basic duty cycle or the desired fuel injection or ignition timing.

Abstract: In a fuel injection system which electrically controls an amount of pressurized fuel supplied to an internal combustion engine, an electromagnetic valve which opens to inject the pressurized fuel is disposed at an upstream of a throttle valve in an intake pipe so that a group of cylinders of the engine is supplied with fuel therefrom. A pressure regulator is provided to regulate a pressure of the pressurized fuel in proportion to an intake pressure present at a downstream of the throttle valve.

Abstract: A fuel injection device for Diesel engines includes a combustion detector comprising a photoelectric transducer and a light path extended through a nozzle body to transmit the light of a combustion flame developed in an engine cylinder to the photoelectric transducer. One end of the light path is opened to an oil sump communicating with a nozzle opening so that only when the nozzle opening is opened for injecting fuel and then a combustion flame is developed, the light of the flame is passed through the light path and reaches the photoelectric transducer thereby generating an electric signal indicative of the actual time of the combustion. The whole or part of the light path may be comprised of optical fibers.

Abstract: A power amplifier which has a muting circuit bringing the power amplifier into a muting condition when an excessively large input signal is applied. The power amplifier comprises a preamplifying stage and a power amplifying stage. The preamplifying stage includes at least one transistor for driving the power amplifying stage. The collector of the transistor is coupled to one power source terminal. The emitter of the transistor is coupled to the other power source terminal through an electronic switch, and to the first power source terminal through a resistor. The electronic switch selectively connects the emitter of the transistor to one of the power source terminals.