Abstract: An arrangement is proposed which is adapted to prevent misconnection between two optical connectors each having a female half and a male half. The female half is formed with a projection and the male half is formed with a hole to receive the projection. A guide plate having one corner beveled is mounted on the projection to prevent misconnection.

Abstract: A travel locus display device has a display unit such as a CRT display to display a start point and a destination point of a vehicle and a travel locus of the vehicle from the start point to the destination point on a coordinate display area of a display screen of the display unit. The display screen is divided into four quadrants, one of which is selected as a display quadrant to which the destination point belongs. The display quadrant is displyed over an entire area of the coordinate display area.

Abstract: A monolithic catalyst, for the purification of exhaust gases from an internal combustion engine, comprising: an inert carrier; a film of alumina and rare earth oxides coated onto the surface of said inert carrier, wherein Ce and La are present in said film at an atomic ratio of Ce/La of 0.05-0.3 and the total content of rare earth oxides in said film is 2-50 wt. %, measured as R.sub.2 O.sub.3, wherein R is an element of the lanthanide series of the Periodic Table; and said film carries a catalyst component containing at least one element of the platinum family.

Abstract: A method of and an apparatus for measuring fluctuations in the indicated mean effective pressure of an engine from a deviation of the mean pressure or from an unbiased variance (mean square) of the mean pressure obtained from the deviation in the mean pressure by utilizing a deviation of the mean pressure becomes substantially identical with a deviation of the indicated mean effective pressure or an unbiased variance (mean square) of this mean pressure becomes substantially identical with an unbiased variance (mean square) of the indicated mean effective pressure in a cylinder of the engine. This deviation of the mean pressure is calculated from detected changes in the rotational speed of the engine.

Abstract: An internal combustion engine having a plurality of cylinders each comprising a first intake valve, a first intake passage connected to the corresponding cylinder via the first intake valve, a second intake valve, and a second intake passage connected to the corresponding cylinder via the second intake valve. A second throttle valve is provided for each second intake passage and opens when the load of the engine is increased beyond a predetermined level. A blind common connecting passage is provided, which has a plurality of branch passages each being open to the corresponding second intake passage located downstream of the corresponding second throttle valve.

Abstract: A torque sensor generates an electric signal representing a change in the state of electromagnetic or electrostatic coupling between first and second rotors coupled together by a torsion spring. The change is caused with relative rotation of the two rotors caused by detected torque in a power assisted steering system of an automotive vehicle.

Abstract: A helically-shaped intake port comprising a helical portion and an inlet passage portion which is tangentially connected to the helical portion and extends so as to be slightly curved. The intake valve is arranged at the outlet open end of the helical portion. The first side wall of the inlet passage portion, which is located near the axis of the intake valve, has on its upper portion an inclined wall portion which is arranged to be directed downwards. The width of the inclined wall portion of the inlet passage portion is gradually increased towards the helical portion. The second side wall of the inlet passage portion, which is located remote from the axis of the intake valve, is vertically arranged and smoothly connected to the peripheral side wall of the helical portion, which extends circumferentially about the axis of the intake valve.

Abstract: An impeller is assembled onto a turboshaft such that the impeller is deformed at its end walls so as to deform the inner wall of the hole of the impeller against the shaft such that the clearance between the shaft and the hole of the impeller is reduced to zero, thereby, preventing bending or offsetting of the shaft relative to the impeller. For causing the deformation of the shaft, washers with a circular projection are disposed on both sides of the impeller, with the projection facing the end walls of the impeller. The washers and the impeller are clamped by a nut which is screwed to the threaded end of the shaft, resulting in the projection being forced into the end wall of the impeller, thereby deforming the impeller.

Abstract: A restriction device for a differential gear having multiplate clutches which are formed by first friction plates fixed to a pair of side gears installed inside of a differential casing and second friction plates fixed to the differential casing. The first and second friction plates are alternately situated and are in contact with each other, wherein one of the frictional faces of the friction plates is treated by cold rolling while the other is coated with a self-lubricating agent so as to minimize the tendency of increasing differential movement of both side gears.

Abstract: A torque transmission system has driving and driven pulley units around which an endless V-belt extends. Each pulley unit has a stationary pulley part rotatable with a shaft and a movable pulley part disposed to define with the stationary pulley part a circumferentially continuous groove for receiving the V-belt. The movable pulley parts of the pulley units are axially resiliently biased so that the radii of the circle along which the V-belt engages the driving and driven pulley units are varied to change the speed-change ratio of the transmission system. The movable pulley part of the driven pulley unit is axially shifted by the action of fly weights held between a stationary plate fixed to the shaft and a holder fixed to the movable pulley part.

Abstract: In an apparatus for controlling an air conditioner through a computer, various controls are automatically effected by voice command as well as by manual operation. Specific voice commands are predetermined in accordance with the control objectives. The voice commands are read by a voice recognizing equipment, whereby recirculated air-fresh air switching and air outlet switching are effected by a microprocessor in accordance with the commands, thereby eliminating necessity for manual operation.

Abstract: A vehicle body floor construction of a motor vehicle, wherein a tunnel being upwardly projecting, downwardly opening and disposed in the longitudinal direction of the vehicle is formed at the central portion in the widthwise direction of a floor panel, a fuel tank is disposed in the tunnel and at least one cross member traversing the fuel tank disposed in said tunnel in front, at the back or at the underneath of the fuel tank in a manner to block the tunnel are integrally formed on the floor panel.

Abstract: A vehicle body floor construction of a motor vehicle, wherein a tunnel upwardly projecting from the surface of a floor panel and disposed in a longitudinal direction of the vehicle is formed at the central portion in the widthwise direction of the floor panel and includes a fuel tank disposed therein, and said tunnel is made to serve as an armrest for an occupant at the upper surface thereof at an inner side of an occupant's seat.

Abstract: In a hydraulic control system for an automatic transmission for vehicles having a pump being driven by the engine of the vehicle for generating a pressure of pressurized fluid in the hydraulic control system, and a pressure regulator valve for regulating the pressure of pressurized fluid supplied from the pump in keeping with an input signal pressure varying in accordance with the cruising condition of the vehicle, a pressure relief valve is provided in the input fluid passage of the regulator valve for relieving the pressure when the input signal pressure exceeds a predetermined level.

Abstract: An improvement in a double Cardan universal joint having a pair of spiders connected by a ring-shaped coupling member, a pair of yoke members angularly movably connected with each other by the spiders, a centering assembly for aligning the yoke members with each other and defining a reservoir for grease within a bridge forming a part of one of the yoke members and a breather hole formed in the bridge for making the reservoir communicate with the atmosphere. The improvement comprises a valve of elastic material inserted in the breather hole and capable of elastically blockading the communication of the reservoir with the atmosphere when internal pressure of the reservoir is below a predetermined amount and being elastically deformed to make the reservoir communicate with the atmosphere when the internal pressure reaches or exceeds the predetermined amount.

Abstract: Disclosed is a sensor for detecting flow quantity of fuel supplied to a fuel injection system based on an idea that the flow quantity of fuel supplied to a fuel injection system is detected by means of detection of a displacement of a spill-ring. This sensor is provided with a detection member connected with a spill-ring of a fuel injection system, a coil assembly consisting of a coil for detecting the displacement of the spill-ring which is fitted to one end of a bobbin which is arranged to face with the detection member but not to contact the detection member, the one end of the bobbin being arranged to face with the detection member, and a coil for temperature compensation, the two coils being arranged side by side along the bobbin with a predetermined space therebetween, and a member for holding the coil assembly and for fitting the coil assembly to the fuel injection system.

Abstract: An automotive driving instruction system which comprises a plurality of sensors including a vehicle speed sensor etc. mounted at various parts of the automobile, a computer for reading the outputs of the sensors for calculating the driving conditions of the automobile, and a replaceable external memory unit. The computer calculates a plurality of values representing the driving conditions of the automobile on the basis of the outputs of the sensors, and controls to generate an alarm when any of the values thus calculated becomes to corresponding one of a plurality of predetermined values. Also, the accumulated value of the alarms and the respective accumulated values of the alarms for each of causes of alarming are stored in the external memory unit. At the end of a driving, the external memory unit is demounted, so that any habits of the driver is determined from the data stored in the external memory unit to contribute to the correction thereof.

Abstract: A wear-limit warning device for a vehicle disc brake, warning the vehicle driver that a maximum permissible wear limit is reached on the friction pad or pads. The warning device comprises a projection protruding sideways from the end face of a backing plate of each friction pad, and a warning member made from a spring sheet material. The warning member consists of a mounting leg portion, a contact portion and a spring portion connecting the leg and contact portions. The leg portion having a pair of legs which grip therebetween an end portion of the backing plate and the protruding projection thereby attaching the warning member to the backing plate and preventing the same from being shifted out of position during service. The contact portion extends along the end face of the projection until its end reaches a permissible wear limit level of the friction member of the friction pad, and is pressed against the end face of the projection with a resilient force of the spring portion.

Abstract: A control valve for an exhaust gas recirculation apparatus for leading part of the exhaust gas from an exhaust line to a suction line. This control valve comprises a throttling member provided in the passage for recirculating exhaust gas, and a valve body the opens and closes the passage of the throttling member. The hole provided in the base of the throttling member has an inside diameter smaller than the hole of the throttling portion. The end portion of the valve body has an outside diameter a little smaller than the inside diameter of the hole of the throttling member, and the length of this end portion in the axial direction is selected so as to allow at least its end to pass the base of the throttling member when the large diameter portion of the valve body is in contact with the base. The thickness of the base of the throttling member in the axial direction is sufficiently smaller than the inside diameter of the hole of the base.

Abstract: Maps from a starting point to a destination are automatically, successively renewed and indicated on CRT each time a predetermined distance is covered. The map to be indicated are divided into a plurality of map contents and stored in a memory medium, and further, checkpoints for correcting accumulated errors of the running distance each predetermined distance are stored in the memory medium. Additionally, a notice by voice is given everytime map is renewed, immediately before the renewal.