Abstract: A display system for a vehicle is provided with a fluorescent display tube. An anode control circuit outputs a control signal for selecting one or more of anode electrodes of the display tube to output a first control signal in response to which the selected anode electrodes are supplied with a positive voltage to cause the flourescent display tube to make a display. A display condition judging circuit judges whether or not the anode control circuit is outputting the first control signal. A brightness judging circuit judges whether the surroundings of the fluorescent display tube are bright or dark. A filament control circuit outputs a second control signal for energizing a filament of the display tube when said display condition judging circuit judges that the anode control circuit is outputting the first control signal and/or when the brightness judging circuit judges that the surroundings of the display tube are bright.

Abstract: A prestroke control device for a fuel injection pump includes at least one control sleeve slidably fitted on at least one plunger, a control rod engaging the control sleeve, the control rod extending perpendicularly to the plunger and rotatable about an axis thereof for varying an axial position of the control sleeve relative to the plunger to thereby control the prestroke of the plunger, and an actuator for rotatively driving the control rod about its own axis. A counterweight is movable in unison with rotation of the control rod for cancelling a rotating force generated by axial movement of the control sleeve and acting upon the control rod.

Abstract: In a system for automatically controlling a gear transmission wherein an actuator device coupled with an operation member for the gear-shifting operation of the transmission is controlled for shifting the transmission to a target gear position, the system is provided with a first control unit for producing target signals indicating target gear positions and transmission data showing the relationships between specific gear positions of the gear transmission and positions of the operation member. A second control unit responsive to the target signal and the transmission data to produce a control signal for controlling the actuator device so as to position the operation member to a position corresponding to the target gear position.

Abstract: In a control system for actuating vehicle safety devices, data representing change in the detected vehicle speed is calculated on the basis of the acceleration sensed by a vehicle acceleration sensor. The data is compared with a reference signal depending upon the vehicle running speed to discriminate whether or not the change in the detected vehicle speed has reached a level determined by the reference signal, whereby the occurrence collision can be detected reliably and without erroneous detection over a wide range of vehicle running speeds.

Abstract: Here is disclosed a heat exchanger of the multiflow type comprising a plurality of flat tubes and corrugated fins stacked together one on another alternately, an inlet header pipe to which said flat tubes are connected at their one ends, an outlet header pipe to which said flat tubes are connected at their other ends, and partitions provided within said respective header pipes so that a flow of refrigerant folded plural times in zigzag fashion is established along a purality of paths defined between the two header pipes, wherein the corrugated fins and the flat tubes are previously dimensioned within the respective optimal ranges and the number of the paths as well as the numbers of the flat tubes defining the respective paths are also optimally selected so that the passage resistance of the refrigerant and the flow resistance of the cooling air may be effectively reduced while improving the heat exchanging efficiency, and thereby a heat exchanger having a totally high reliability may be obtained.

Abstract: Here is disclosed a scroll-type fluid handling machine having a hermetically sealed casing enclosing therein a stationary side scroll member fixed to the casing, a movable side scroll member adapted to be rotatable in engagement with the stationary side scroll member and an electromotor used to drive the movable side scroll member, wherein said electromotor comprises a linear motor consisting of movable side magnets and stationary side coils mutually facing in the axial direction of the machine itself and is adapted to directly drive the movable side scroll member. Such feature makes the drive shaft as well as the crankshaft which have conventionally been essential to the machine unnecessary, thereby minimizing a mechanical loss and improving a mechanical efficiency. In addition, the axial dimension of the machine can be substantially reduced so as to obtain a compact, light weight machine.

Abstract: An acceleration sensor includes a tubular casing having one open and closed by a lid of an elastic material. A magnetic member is received within a sealed space defined by the casing and the lid, and a damper liquid fills in the sealed space. The lid is fixedly connected at its outer peripheral portion to one end portion of the casing including the open end thereof. The lid is deformable away from the other end of the casing so as to absorb a thermal expansion of the damper liquid. The lid has an annular deformable diaphragm portion extending between a central tubular portion of the lid and the outer peripheral portion of the lid. For attaching the lid to the casing, the outer peripheral portion of the lid is pressed into the one end portion of the casing so as to bring the diaphragm portion into contact with the damper liquid, so that part of the damper liquid flows into the tubular portion. Subsequently, an axial bore of the tubular portion is closed by a closure member.

Abstract: A magnetic sensor includes a sensor housing having a front end directed toward a member to be sensed. A magneto-electric transducer is mounted in the sensor housing and disposed adjacent to the front end of the sensor housing. A magnetic flux-collecting chip of a high-permeability material is supported on the front end of the sensor housing. The magnetic flux-collecting chip is disposed forwardly of the magneto-electric transducer. The magnetic flux-collecting chip has an exposed front face directed away from the magneto-electric transducer. The sensing ability or performance of the magneto-electric transducer is substantially determined by a magnetic gap between the front face of the magnetic flux-collecting chip and the member to be sensed.

Abstract: An automotive heat exchanger of the parallel flow type includes a number of flat tubes (4), a number of corrugated fins (5), with the flat tubes and the corrugated fins being stacked alternately, the first cylindrical header tank (2) to which the tubes are connected by inserting one end thereof laterally into the first header tank, and the second cylindrical header tank (3) to which the tubes are connected by inserting the other end thereof laterally into the second header tank. The ends of each tube inserted laterally into the header tanks are cut off along the inner peripheral surfaces of the header tanks, thus minimizing the obstruction of flow in the headers. The header tanks may be made substantially elliptical.

Abstract: In a method for correcting clutch data used for controlling the engaging/disengaging operation of a friction type vehicle clutch, the meet position data among the clutch data is updated by a learning operation at each operation of a predetermined operation member of the vehicle, and the updated meet position data is corrected in accordance with the engine speed during the actual operation of the clutch, each time the vehicle is driven off, whereby appropriate correction of the clutch data can be carried out at suitable time intervals.

Abstract: A rigid wall partition system which is vertically upwardly movable into storage position and vertically downwardly movable to form a continuous wall. The system comprises a plurality of panels secured to members which in turn are pivotally secured to spaced trains of single pantographs, contraction of the pantograph causing the panels to fold, in accordion fashion and expansion of the pantographs causing the panels to move to vertical, wall-forming position.

Abstract: A clutch control apparatus for controlling the operation of a friction type clutch comprises a data generator responsive to an engaging command signal for generating an electric signal corresponding to the time-course in a target clutch stroke pattern for engaging the clutch. The actual clutch stroke of the clutch is adjusted by the use of a clutch actuator coupled with the clutch in response to the electric signal in such a way that the actual clutch stroke is made to coincide with the target clutch stroke at each instant, whereby the actual clutch stroke varies in accordance with the desired time-course pattern for engaging the clutch after the application of the engaging command signal. The initial target clutch stroke of the desired pattern may be corrected in accordance with the amount of operation of an acceleration member to reduce the dead time in the torque transmission through the clutch.

Abstract: A variable capacity wobble plate compressor includes a wobble plate (36) in the crank chamber (7) for adjusting the piston stroke; a control valve (45) for controlling the chamber pressure in the crank chamber to adjust the angle of the wobble plate; a pressure sensor (53); a rotary speed sensor (56); a heat load sensor (61); and/or a vibration sensor (62); and a control unit responsive to a signal from at least one of the sensors for controlling the control valve to prevent the compressor from entering an unstable zone.

Abstract: A variable capacity vane compressor has a control element rotatable in response to the difference between suction pressure and control pressure for varying the compression starting timing and hence the capacity. A communication passage extends between the suction chamber and a high pressure chamber in which the control pressure is created. A spool valve opens and closes the communicating passage. An electromagnetic actuator generates an electromagnetic force to cause the spool valve to open the communication passage when energized. A control unit is arranged outside of the compressor and supplies the actuator with an external control signal for energizing the actuator.

Abstract: In a control system for controlling a clutch coupled with an internal combustion engine for driving a vehicle off, the control operation for clutch engagement is carried out based on the level of power insufficiency of the engine. When the level of engine insufficiency is within a predetermined range, the operation for clutch engagement is controlled in accordance with the change in the amount of operation of an accelerating member without stopping the engaging operation of the clutch. In order to improve the performance experienced by the operator at drive-off, just after recovery from power insufficiency, the target clutch stroke to be followed is corrected by correction data determined on the basis of the difference between the target and actual clutch stroke at the time the engine has just recovered from its power insufficiency.

Abstract: A peak hold circuit and a sample-and-hold circuit are provided for accurately and immediately detecting variations in a load connected to a generator. The peak hold circuit holds a peak voltage of a waveform voltage signal having an amplitude corresponding to the magnitude of the load. The peak hold circuit is responsive to a reset signal from a reset circuit to be reset during a time interval between a point after the peak of the waveform voltage signal and a point before a subsequent peak of the waveform voltage signal, so that the peak hold circuit is reset, thereby renewing the peak voltage held in the peak hold circuit. When the sample-and-hold circuit receives a sampling instruction signal from a sampling instruction circuit during a time interval between a point after the peak of said waveform voltage signal and a point before said reset signal is outputted, the sample-and-hold circuit operates in a sampling mode to sample the peak voltages outputted from the peak hold circuit.

Abstract: To optimize valuable processor time required for the execution of the main control program in an engine control system, execution of no more than two interruption programs in preparation for execution of a frequency calculating program is provided.

Abstract: In a control apparatus for automobile air-conditioner of the type wherein the air blow-off mode is determined based on the opening of an air-mix door and the substantial temperature of an evaporator for actuating a mode door, the improvement which includes a judgment circuit for making a determination as to whether or not the outside air temperature is lower than a predetermined value in a heat mode operation and whether or not a defrosting operation is needed, and a bleed determination circuit for determining the amount of air bleed needed to be provided to a defrost outlet based on the result of the determination of the judgment circuit and the temperature of an upper part of the vehicle compartment. With this arrangement, the amount of air bleed provided to the defrost outlet can be varied continuously in accordance with the upper-part temperature in a range of between the heat mode and a defrost/heat mode.

Abstract: A vane compressor has at least one compression space defined between a rotor and a cylinder. A shaft seal and a bearing are fitted on a driving shaft and disposed adjacent to each other. A lubricating oil supply device supplies compression medium to the shaft seal and the bearing, through at least one passage extending between the at least one compression space and the shaft seal and the bearing. The at least one passage has an open end opening into the at least one compression space at a predetermined circumferential location at which pressure within the at least one compression space changes from a negative value into a positive value when each of the vanes passes the predetermined circumferential location, whereby lubrication and cooling of the shaft seal and the bearing is effected in an efficient manner.

Abstract: A variable capacity vane compressor in which one end face of a side block facing the rotor is formed therein with an annular recess in a bottom of which is formed a second recess. A control element rotatably received in the annular recess for varying the timing of commencement of the compressor. The control element cooperates with the second recess to define therebetween a pressure working space. The control element has a pressure-receiving protuberance slidably fitted in the pressure working space to divide same into a first pressure chamber and a second pressure chamber. A communication passage extends between the first pressure chamber and a low pressure zone. A control valve device is arranged in the communication passage for opening and closing the communication passage in response to suction pressure. A sealing device is provided in the bottom of the annular recess and engages portions of the control element other than the pressure-receiving protuberance.