Abstract: An idle control system for an automobile internal combustion engine includes an idle control unit for controlling the operation of an electromagnetically operated actuator. While the engine has a combustible mixture intake passage leading to the engine and a throttle valve operatively positioned inside the mixture intake passage for controlling the flow of a combustible air-fuel mixture towards the engine, the actuator is utilized to adjust either the effective cross sectional area of a bypass air passage leading from the air source to the mixture intake passage at a position downstream of the throttle valve or the opening of the throttle valve, to control the engine speed during idling to a predetermined value.

Abstract: A shaft structure comprising a shaft and a hollow spherical shell having diametrically aligned holes which are of a diameter smaller than the outer diameter of the shaft. The shell is secured to the shaft at the aligned holes by radially deforming the shaft. The method for manufacturing the shaft structure includes steps of forming the shell from a tubular blank by swaging the blank so that the opposite ends of the blank bite into the shaft to secure it firmly to the shaft.

Abstract: An automobile has an operable rear panel such as a rear trunk lid or a back door. A rear seat assembly has a rear seat back which is forwardly foldable to provide an increased package space. A locking mechanism is provided for holding the seat back in the upright position. The locking mechanism can be unlocked by moving the rear panel beyond an open position.

Abstract: A hinge structure for pivotally connecting a hood or bonnet of an automobile to the automobile for selectively opening and closing an automobile engine compartment of a front body structure of the automobile including a first hinge bracket having one end portion rigidly secured to a stiffening plate which is in turn secured to the hood, and a second hinge bracket having one end portion rigidly secured to a radiator shroud which is in turn secured to the front body structure. The other end portions of the respective first and second hinge brackets are pivotally connected by means of a hinge pin. Each of the first and second hinge brackets is of generally a U-shaped cross-section.

Abstract: A steering column supporting structure for use in a motor vehicle which includes a vertical portion provided at approximately a central portion of a vehicle body, and a hollow horizontal structure extending laterally, at its base portion, from the upper portion of the vertical structure toward the side wall of the motor vehicle adjacent to the driver's seat. The lower end of the vertical structure is connected to a tunnel portion or raised portion of a vehicle floor with a high rigidity, while the other end of the horizontal structure at the side wall of the motor vehicle is connected to an inner side panel constituting a closed cross sectional structure together with a hinge pillar outer panel for the improvement of rigidity at the steering column supporting portion.

Abstract: An air-fuel ratio control system for an internal combustion engine including an automobile carburetor having a fuel passage for forming a combustible air-fuel mixture by mixing fuel fed through the fuel passage with air drawn from the atmosphere, comprises a catalytic converter for substantially purifying exhaust gases emitted from the engine, a composition sensor for sensing the concentration of a component of the exhaust gases as a function of the air-fuel mixing ratio of the combustible mixture burned in the engine, a first air bleed passage leading from the atmosphere to the fuel passage, a first actuator for controlling the flow of air through the first air bleed passage, an air-fuel ratio control for controlling the duty ratio of the first actuator in dependence on the output signal fed thereto from the composition sensor, a second air bleed passage leading from the atmosphere to the fuel passage, a second actuator for controlling the flow of air through the second air bleed passage, and an air bleed co

Abstract: A tiltable steering mechanism having a steering shaft connected at lower end through a universal joint with one end of an intermediate shaft which is in turn connected at the other end through a universal joint with a steering gear mechanism. The steering shaft is supported by the automobile body through an adjusting device. The intermediate shaft is of a unitary construction and journalled by a bearing on the body so that the steering shaft is tiltably moved about the universal joint at the lower end thereof through an actuation of the adjusting device.

Abstract: A rear side door structure for four-door type automobiles including a rear door panel having an upper hem which defines a lower edge of a window opening, a guide member extending upwardly from the upper hem of the door panel to divide the window opening into a front opening portion and rear opening portion, a front glass panel fitted to the front opening portion, a rear glass panel disposed in the rear opening portion for movement along the guide member. The guide member is inclined rearwardly so that the rear glass panel is shifted forwardly when it is moved downwardly. According to this arrangement, the rear glass panel can be retracted into the door panel without any interference with the cut-off portion which is normally provided in the door panel at the rear lower portion for avoiding the rear tire house.

Abstract: An apex seal of a rotary piston engine comprising a sealing groove formed in each apex portion of the rotor, a sealing piece and a support piece disposed in the sealing groove with a superposed relationship. A corner seal at each end of the apex seal including a corner seal member formed with a longitudinally extending slit for receiving an adjacent end of the apex seal pieces. The slit in the corner seal member is generally wider than the sealing groove of the apex seal but has a minimum width portion that is narrower than the sealing groove. The minimum width slit portion is disposed against only one of the sealing and support pieces of the apex seal so that the sideward movement of the other piece is not disturbed by the corner seal member.

Abstract: A rock drill having a hydraulic system for controlling a striking, rotating and advancing movements of a drilling rod. The advancing or forward feeding conduit for a feed actuator is provided with a relief valve which is responsive to the pressure in the positive rotating conduit for a rotary actuator so that the pressure in the forward feeding conduit is relieved to weaken the advancing force when the load on the rotary actuator is increased. A further relief valve is also provided for relieving the pressure in the striker conduit to weaken the striking force. A switching valve is provided between the advancing and retreating conduits for the feed actuator so that the direction of movement of the feed actuator is automatically changed when there is an abrupt decrease in the pressure in the striker conduit.

Abstract: An improved pillar construction for use in a motor vehicle which includes a pillar inner panel and a pillar outer panel rigidly combined to each other so as to define a closed cross section. The pillar inner panel is formed with a raised portion of arcuate cross section extending along an entire length of the pillar inner panel and protruding toward the interior of the motor vehicle, with a reinforcing pipe member of metallic material being welded along the inner surface of the raised portion so as to provide the pipe member fixed to the interior of the closed cross section defined by the pillar inner panel and pillar outer panel for reinforcement of the pillar.

Abstract: An improved air intake arrangement for Diesel engine in which an intake air shutter valve is provided in an intake air passage of the engine for closing the intake air passage when the degree of depression of an accelerator pedal is small, especially in engine idling and speed retardation, i.e. during non-load period, so as to reduce engine vibrations and noises during light-load operation by throttling the intake air passage or reducing the substantial effective passage area, and also deterioration of combustion is prevented by reducing throttling effect of the intake air shutter valve or increasing the passage area during cold period of the engine, while braking effect of an exhaust brake is maintained also by reducing throttling effect of the shutter valve or increasing the passage area.

Abstract: An automobile body having a rear tire house structure including an outer tire house panel and a floor panel. The outer tire house panel is so shaped that it can be used with a tire of larger diameter for a single-tired wheel arrangement and the floor panel is formed at a transversely outer edge with a cut-out which is of a transverse width sufficient to receive wheels for double-tired arrangement and a longitudinal length sufficient to accommodate the larger diameter tire. An inner tire house panel is provided between the outer tire house panel and the floor panel and may have a configuration corresponding to that of the outer tire house panel to define a tire compartment for a large diameter single-tired arrangement or a configuration of no or small projection suitable for a small diameter double-tired arrangement.

Abstract: A rear side door structure for a four-door type automobile including a door panel having an upper hem for defining a lower edge of a window opening, a guide member extending upwardly from the upper hem of the door panel to divide the window opening into a front and rear opening portions, a front and rear glass panels respectively provided in the opening portions. One of the glass panels is fixed to the door panel and the other is movable along the guide member. A cover panel is integrally formed with the door panel to cover the guide member.

Abstract: An exhaust gas purifying system for an automobile engine including at least first and second engine cylinder has a shutter valve for interrupting the supply of a combustible air-fuel mixture to the first engine cylinder during a particular engine operating condition, a three-way electromagnetically operated valve for controlling the operation of the shutter valve, and a secondary air supply unit including a switching valve for selectively supplying a secondary air to a portion of an exhaust passage upstream of at least one catalyst unit disposed in the exhaust passage.

Abstract: A positioning arrangement for a drilling machine or the like in which the desired position of a bit of the drilling machine mounted on a boom structure is indicated based on rectangular coordinates for facilitation of automatic positioning programming for the boom structure, with the position of a particular boom end being designated by numerical values for quick and accurate positioning of the boom structure at the required positions.

Abstract: In a gear tooth having a tooth surface, the gear contact pattern is inspected by the steps of measuring the tooth surface at regularly positioned measuring points to detect deviations from a standard gear profile at corresponding measuring points and counting the number of such measuring points wherein the deviations are within a predetermined limit. Where the counted number is greater than a predetermined value, the tooth surface is accepted.

Abstract: A reclining arrangement for a seat or the like including a seat back reclinably mounted to a seat cushion through a reclining knuckle having a rough adjusting mechanism for roughly adjusting, stepwise, the folding angle of said seat back with respect to said seat cushion. The reclining arrangement includes a first arm of the reclining knuckle selectively fixed to either one of the seat back or seat cushion, a second arm of the reclining knuckle pivotally connected to the remaining one of the seat back or seat cushion, and a fine adjusting mechanism so provided as to adjust the angle of rotation of the second arm, the rough adjusting mechanism being disposed to be spaced a predetermined distance from the fine adjusting mechanism.

Abstract: A motor control apparatus comprises an electric reversible motor, a movable member mechanically connected to the motor, first and second electroconductive bridge members rigidly mounted on the movable member, a plurality of switches, electroconductive feelers equal in number to the number of the switches, a first circuit for supplying an electric power to the first bridge member and also to the motor to rotate the latter in one of the opposite directions when energized, and a second circuit for supplying the electric power to the second bridge member and also to the motor to rotate the latter in the other of the opposite directions when energized.

Abstract: A temperature responsive, pressure operated diaphragm valve assembly for use in association with an automobile internal combustion engine comprises a valve housing having a working chamber on one side of a diaphragm member, a biasing spring used to urge the diaphragm member in one direction with a valving element held in position to close a fluid passage, one end of the fluid passage being communicated to the fuel intake system of the engine and the other end thereof communicated to a source of fluid medium, and a temperature sensor having a parameter, the magnitude of which is variable according to the magnitude of the ambient temperature. The temperature sensor also has a push rod axially movable in response to change in magnitude of the parameter, the movement of the push rod being in turn transmitted to the biasing spring to adjust the biasing force exerted thereby on the diaphragm member.