Abstract: An air conditioning system includes an evaporator and a variable capacity compressor. The compressor has a lower pressure zone including a suction chamber connected to the outlet of the evaporator, a higher pressure zone, a bellows displaceable in response to pressure representative of a thermal load on the system, a control valve device responsive to displacement of the bellows for bringing the higher pressure zone into and out of communication with the lower pressure zone to thereby control the difference between pressure from the higher pressure zone and pressure from the lower pressure zone, and a control element responsive to change in the difference between pressure from the higher pressure zone and pressure from the lower pressure zone for varying the delivery quantity of the compressor.

Abstract: A unit injector for fuel combustion is integrally structured with an injection pumping mechanism and an injection valve mechanism. A housing is fixedly united with an injection pumping part and an injection valve part, the injection pumping part being formed with a stepped insertion hole, and the injection valve part being formed with an oil path extending toward a nozzle body at an end thereof concentrically. A barrel has a hole for guiding a plunger, and fuel inlet and outlet ports, the shape and outer diameter of which are finishing-processed for coinciding with the insertion hole, and the barrel is shrunken in size by cooling and inserted into the insertion hole while it is cooled, and exactly fitted into the insertion hole when the shrinked barrel is recovered to the initial size by returning to the room temperature and supported at an inner diametered part and a stepped part.

Abstract: A press-fit structure of a shaft comprising a shaft and a member to be fitted with the shaft formed with a shaft hole for receiving the shaft therein, the shaft being formed at a predetermined position of the peripheral surface thereof with a meshing shaft portion which is formed with a plurality of meshing projections in the axial direction, the shaft hole being formed in an inner peripheral surface thereof with an annular groove for collecting a press-fit fin of cut material.

Abstract: An automatic gear change device includes a first actuator operation control circuit for controlling the operation of a first actuator, a second actuator operation control circuit for controlling the operation of a second actuator, and a main control circuit for controlling the operation of the first and second actuator operation control circuits. The device further includes a communication line interconnecting the first and second actuator operation control circuits to thereby enable data transmission/reception between each operation control circuit and the main control circuit through the other actuator operation control circuit and the communication line.

Abstract: In a heater device for motor vehicles of the type in which engine cooling water is supplied from one or both of an engine and a combustion heater to a heater core for heating the passenger compartment of a motor vehicle, a directional control valve with four distinct directions is disposed in a supply conduit of a circulation circuit extending between the engine and the heater core. The directional control valve includes a valve box having four intake and discharge ports, and a rotary spool disposed in the valve box and having a radial straight hole interconnecting a diametrically opposite pair of the intake and discharge ports and an arcuate peripheral recess connecting adjacent two of the intake and discharge ports.

Abstract: Rotation speed of automotive auxiliary machines is controlled by a drive pulley provided on a crank shaft and a driven pulley communicating with the drive pulley through a V-belt. The drive pulley comprises a rigid pulley secured on a drive shaft, a guide holder to be rotated together with the drive shaft by a mount bolt, and a slide pulley axially-movably located between the guide holder and the rigid pulley. The slide pulley provides a power piston to be moved along a guide holder shaft. The power piston, the guide holder flange, and the slide pulley define a power piston chamber.Inside of the power piston chamber are located a flyweight to be moved by centrifugal force and a servo valve to be axially moved by the flyweight. The servo valve is fitted on the outer peripheral surface of the power piston.

Abstract: A variable capacity compressor including a pumping device, and a control element the position of which can be changed to determine the capacity of the pumping device. The compressor comprises: a detector for detecting change in the position of the control element in a continuous manner; and a capacity-indicating device for visually indicating an output value thereof in a manner continuously variable in response to a continuous change in output from the detector, whereby the output value visually indicated by the capacity-indicating device varies continuously with a continuous change in the capacity of the pumping device.

Abstract: A demisting control system of an air conditioner for automotive vehicles, which comprises an evaporator, and a variable capacity compressor capable of being controlled in capacity from the outside. An actual cooling degree of the evaporator is detected. At least two desired cooling degrees of the evaporator are set. The detected actual cooling degree and each of the set at least two desired cooling degrees are compared with each other. On the basis of the comparison results, a value of the capacity to which the compressor is to be controlled is determined. The at least two desired cooling degrees are selected one by one in predetermined sequence and each selected desired cooling degree is compared with the actual cooling degree as above for a predetermined time period exclusively provided therefor. The compressor is driven so that its capacity is brought to the value of capacity determined as above.

Abstract: An electromagnetic proportional control valve apparatus comprises a valve body, a spool accommodated in a guide bore in the valve body, a valve seat element arranged at one end of the guide bore and facing toward the spool, a pilot valve controlling a valve bore in the valve seat element, and an electromagnetic drive unit for controlling the pilot valve. The spool has an axially extending axial bore formed in an end face opposed to the valve seat element, and a first restricting bore through which the axial bore communicates with the supply port. A projecting portion is formed on an end face of the valve seat element opposed to the spool, and is inserted in the axial bore in the spool. The projecting portion has a forward part formed therein with second restricting bores through which one end of the valve bore communicates with the axial bore. A restricting passage is defined between an outer peripheral surface of the projecting portion and an inner peripheral surface of the axial bore in the spool.

Abstract: A variable displacement compressor includes a lubrication oil supply passage defined in a side block for interconnecting a displacement adjustment mechanism disposed in the side block and a high pressure oil sump defined in the side block. With this lubrication oil supply passage, a sufficient lubrication of the displacement adjustment mechanism is achieved.

Abstract: A pressure control valve for a variable displacement swash plate type compressor includes a valve element movable under a combined force of the force of a pressure responsive member and the force of a solenoid. The valve element is engageable with a valve seat which is positionally adjustably mounted on a valve case of the pressure control valve and movable in the direction of movement of the valve element. The solenoid includes an armature to which an adjustment screw is threadedly connected. The extent of the adjustment screw which projects from the armature is adjustable so that the position of the valve element is adjustable relative to the valve seat. With this arrangement, it is possible to adjust the pressure controlling characteristics exactly.

Abstract: In a fuel injection system having a distribution-type fuel injection pump, fuel is supplied successively to cylinders of an engine from a pressurizing chamber of the pump. The pressurizing chamber communicates with a low-pressure chamber through a relief passageway opened and closed by an electromagnetic valve. During a stroke in which volume of the pressurizing chamber is reduced by each forward stroke of a plunger, opening and closing of the valve are controlled, to control starting timing and/or termination timing of fuel injection to the cylinders. A delay occurs in the starting timing and/or the termination timing with respect to drive pulses supplied to the valve, due to an operation delay of the valve. A plurality of memory sections are provided for storing therein delay times for the respective cylinders.

Abstract: A variable capacity vane compressor having compression spaces defined between a cylinder and a rotor at diametrically opposite locations. A control element rotatably arranged in the cylinder, which has two cut-out portions circumferentially extending at diametrically opposite locations through which inlet ports and respective corresponding compression spaces are communicatable with each other. The cut-out portions are disposed relative to the respective corresponding compression spaces such that compression commences in each of the compression spaces when a trailing vane passes a forward end edge of a corresponding cut-out portion with respect to the rotation of the rotor. The control element is rotatable between a partial capacity position and a full capacity position for varying the capacity of the compressor.

Abstract: A variable capacity vane compressor has an annular control element angluarly displaceably received within an annular recess formed in one of side blocks defining a cylinder. The control element is angularly displaced in response to a difference in pressure between first and second pressure chambers formed in the one side block and communicating with a zone under lower pressure and a zone under higher pressure, respectively, and to the biasing force of a biasing member, thereby varying the opening angle of at least one second inlet port formed in the one side block and hence controlling the capacity of the compressor.

Abstract: A soldering structure of a tubular material for soldering one end portion of a tubular material to an auxiliary plate with a soldering material coated thereto, wherein the plane auxiliary plate is formed therein with a communicating hole for allowing the tubular material to be inserted therein, one end portion of the tubular material is inserted into the communicating hole and temporarily secured to the auxiliary plate through a deformation of the auxiliary plate at the end portion of the tubular material or the peripheral area of the communicating hole before soldering, thereby to close one end of a space between the peripheral surface of the tubular material and the inner wall of the communicating hole, the space allowing the soldering material melted to be pooled therein during soldering, and the tubular material and auxiliary plate being soldered when the melted soldering material pooled in the space is hardened.

Abstract: An automobile air conditioner system includes a variable displacement compressor having a wobble plate and a pressure control valve disposed in the compressor for controlling the pressure in a crank chamber. The pressure control valve is operative under the control of predetermined conditions, such as the temperature of an evaporator.

Abstract: A rotation angle detector has magnets of different polarities arranged with one polarity alternately with the other polarity on the circumferential surface of a rotary body, wherein a plurality of magnets on the portions of the circumferential surface having a width which is different from that of a plurality of magnets on the remaining portions. A single rotation angle sensor arranged to oppose the circumferential surface of the rotary body scans the magnets when the rotary body is rotated, thereby outputting a reference signal and a rotation angle signal. Mutually adjacent magnets which differ in width are so formed that whichever is scanned earlier by the rotation angle sensor will have a width narrowed by a predetermined amount if it is wider than the other or a width widened by the predetermined amount if it is narrower than the other. Irrespective of the altered width, the sum of the magnetized areas of these mutually adjacent magnets is held constant.

Abstract: A boost compensator has a valve operative in response to a boost pressure. When the boost pressure is equal to or lower than a setting pressure, the valve intercepts communication between first and second chambers of the boost compensator which are partitioned by a diaphragm. When the boost pressure exceeds the setting pressure, the valve brings the first and second chambers into communication with each other. By the communication, pressure within the second chamber is raised so that the diaphragm and a push rod operatively connected to the diaphragm are moved toward the first chamber. As a result, a control member of a fuel injection pump is caused to be moved in a fuel decreasing direction.

Abstract: A variable capacity compressor for an air conditioning system. A passage extends between a suction chamber and a high-pressure chamber, in which is arranged a control valve device having a pressure-responsive portion displaceable in response to change in pressure within the passage. A capacity control device controls the delivery quantity of the compressor in response to opening and closing of the passage by the control valve device. The control valve device opens and closes the passage in response to change in pressure within the suction chamber representative of a thermal load on the air conditioning system to thereby cause the capacity control device to vary the delivery quantity of the compressor. An auxiliary low-pressure chamber is provided in the passage, within which the pressure-responsive portion is disposed. A restriction hole communicates the suction chamber with the auxiliary low-pressure chamber for introducing pressure within the suction chamber into the auxiliary low-pressure chamber.

Abstract: A backup acceleration signal generator for vehicles having, for example, an automatic transmission operating in response to a signal indicating the amount of acceleration, has a signal generator for producing a backup operation. The backup signal is too small to start the control operation for starting the vehicle and is applied to the automatic transmission in accordance with the braking condition of the vehicle or the operating condition of the automatic transmission. The apparatus supplies the backup signal to the automatic transmission when braking power is applied to the vehicle or the vehicle is in the parked condition, so that the vehicle is prevented from starting automatically when the backup operation starts due to the occurrence of an abnormality of the acceleration signal.