Abstract: A pressure equalizer valve device incorporated in a fuel delivery valve assembly for use in a fuel injection pump, the fuel delivery valve assembly having a valve chamber and a delivery valve member axially movable in part within the valve chamber, the pressure equalizer valve device including a hollow equalizer valve casing member secured to the delivery valve member and having a valve seat surface portion, an equalizer valve element movable into and out of a position seated on the valve seat surface portion, a spring seat member engaging the equalizer valve element, and a helical compression spring seated at one end on the spring seat member and at the other within the delivery valve member, wherein the equalizer valve element, the spring seat member and the spring are all accommodated within the equalizer valve casing member.

Abstract: For supplying fuel from a fuel tank to an internal combustion engine by a fuel supply pump, a fuel delivery pressure of the fuel supply pump is regulated by a pressure regulating valve so as to maintain the difference between the fuel delivery pressure of the pump and an inner pressure of an intake manifold of the engine at a prescribed constant value, and the delivery volume of fuel from the pump is controlled in response to the fuel delivery pressure so as to minimize the amount of surplus fuel produced by the pressure regulating operation of the pressure regulating valve.

Abstract: A control apparatus for automobile air-conditioners includes a vehicle compartment humidity calculating unit for calculating a relative humidity in the vehicle compartment based on the relative humidity on the inside surface of the windshield of a motor vehicle, the temperature of the inside surface of the windshield and the vehicle compartment temperature. The results of calculation are used for the control of operation of the air-conditioner.

Abstract: A motor actuator for use in an automobile air-conditioner for actuating air-mix door, includes an electric circuit for controlling the rotational speed of a motor depending on various conditions such, for example, as a vehicle compartment temperature, and a mechanical limit switch for limiting or restricting the extent of angular movement of the air-mix door, or an electric circuit for the limitation of the angular movement of the air-mix door. According to a preferred embodiment, a built-in switching unit having a mechanical switch disposed in a first housing for producing control signals for various components for the air-conditioner, and a motor actuator having a motor and an electric circuit disposed in a second housing are detachably assembled together by a locking lug and a mating retainer recess.

Abstract: A variable capacity compressor has a control element rotatably arranged within a cylinder, which has two pressure-receiving portions slidably received, respectively, in first and second pressure working chambers formed in the cylinder such that the first pressure working chamber is divided into a first lower-pressure chamber and a first higher-pressure chamber, and the second pressure working chamber into a second lower-pressure chamber and a second higher-pressure chamber. The first and second lower-pressure chambers are supplied with low pressure. A first passage extends between one of the first and second higher-pressure chambers and a compression space for supplying the former with discharge pressure from the latter. A second passage communicates between the first and second higher-pressure chambers. A control valve device is operable in response to suction pressure in the compressor for controlling pressure within the first and second higher-pressure chambers.

Abstract: A demist controller for an automobile air-conditioner includes a demist judgement unit for judging the need for a demist operation based on the relative humidity in the vicinity of the inside surface of a window glass of the automobile, and a correction unit for automatically correcting criteria for a judgement by the judgement unit in accordance with starting and stopping instructions manually given by the driver as occasion arises.

Abstract: An air conditioning control system for an automotive vehicle, comprises a compressor controllable in capacity in response to an external control signal, an evaporator connected to the compressor, a sensor for sensing a temperature of the evaporator, an arithmetic control section for calculating a value of the control signal based upon an output from the sensor, and an output section for supplying the control signal having a value calculated by the arithmetic control section to the compressor. The arithmetic control section carries out first mode control in which it calculates the value of the control signal so that the temperature of the evaporator is held at a predetermined value.

Abstract: An automobile air-conditioner of the type having a variable displacement compressor, wherein a desired degree to which an evaporator is cooled is calculated by a desired cooling degree calculation means, and a desired rotational speed of a blower is calculated by a desired rotational speed calculation means. The results of calculation by both of the calculation means are used for controlling the displacement of the variable displacement compressor. Thus, the displacement of the compressor is corrected in immediate response to a change of thermal loads.

Abstract: The invention is a check valve including a valve housing defining a chamber, an inlet and an outlet; a spring holder retained in the chamber and defining a passage providing fluid communication between the chamber and the outlet, one end of the passage opening into the chamber and defining a stop surface; a valve body disposed in the chamber and movable between a closed position closing the inlet and an open position providing fluid communication between the chamber and the inlet, the valve body defining an abutment surface engaged by the stop surface upon movement of the body into the open position in response to a predetermined fluid pressure at the inlet, the abutment surface and the stop surface being shaped and arranged to provide when engaged fluid communication paths between the chamber and the passage opening; and a spring seated between the holder and the body and exerting a force tending to hold the body in the closed position.

Abstract: An electromagnetic actuator includes a housing and a pair of stators cooperating with the housing to form a magnetic circuit for a solenoid. Each of the pair of stators has a tubular portion, and the tubular portions of the pair of stators have their one ends disposed in the opposed spaced relation to each other. The solenoid is mounted around the tubular portions of the pair of stators, and an armature is received in the tubular portions of the pair of stators so as to be movable along the axis of the tubular portions. The armature is supplied with a force when an electric current is applied to the solenoid. In order to keep the magnetic resistance of the magnetic circuit to a low level, one of the pair of stators is formed integrally with one end of a tubular body of the housing so that the housing and the one stator constitute a unitary member.

Abstract: A control system for controlling an actuator and a display unit of an air-conditioner, and a method of adjusting the control system. An operational amplifier executes calculation on the basis of analogue data from a plurality of temperature-data input terminals. An output from the operational amplifier is sent to a microcomputer through an A/D converter. In a normal control mode, the microcomputer controls the display unit and the actuator of the air conditioner. The microcomputer executes also an adjusting mode in which the microcomputer controls the display unit to display an outut voltage from the operational amplifier. The microcomputer selects one of the modes to be executed in response to a mode signal from a mode-signal generator. A reference voltage is inputted to the operational amplifier from a reference-voltage generating circuit. The reference voltage is adjusted such that the output voltage from the operational amplifier displayed on the display unit is brought to a predetermined standard level.

Abstract: A motor control device controls a motor driving mechanism which drives a motor according to a motor drive signal for providing a normal drive signal and a locked condition signal. When the motor becomes overloaded while being driven by the motor driving mechanism according to the motor drive signal, the motor driving mechanism is controlled by controlling circuitry which inhibits the motor drive signal from being supplied to the motor driving mechanism. The controlling circuitry, while the motor is in the overloaded state, controls the motor driving mechanism so that power is supplied intermittently to the motor, or so that the supply of power for the regular and reverse rotation is given alternately. The controlling circuitry, when the load of the motor becomes normal, allows driving of the motor according to the motor drive signal.

Abstract: A method of controlling the idling rotational speed of an internal combustion engine for an automotive vehicle equipped with an air conditioning system having a variable capacity compressor disposed to be driven by the engine and capable of being controlled by an external control signal. A value of a capacity control signal as the external control signal for controlling the capacity of the compressor is calculated. A value of torque required for starting the compressor is calculated based upon ambient temperature and the calculated value of the capacity control signal. The engine idling rotational speed is increased in accordance with the calculated starting torque.

Abstract: An air conditioning system for an automotive vehicle has a central air outlet, and a pair of left and right air outlets arranged at left and right sides of said central air outlet, which are provided at least one of front and rear portions of the vehicle compartment. A center vent passage extends from a first diverging point and leads to the central air outlet. A side vent passage extends from the first diverging point in a manner separated from the center vent passage and leads to the left and right air outlets. The side vent passage has a pair of left-hand and right-hand vent passages extending from a second diverging point located at a different position from the first diverging point and leading to the left and right outlets, respectively. A flow rate ratio-adjusting door is arranged at the second diverging poing for adjusting the ratio between the flow rates of air delivered into the left-hand and right-hand vent passages.

Abstract: An air conditioning control system for an automotive vehicle equipped with windowpanes has a humidity sensor for sensing humidity on the inner surface of a windowpane, and a temperature sensor for sensing temperature of the inner surface of the windowpane. When the sensed humidity on the inner surface is higher than a first predetermined value corresponding to the sensed temperature of the inner surface, the inner surface is determined to be in a state immediately before a mist occurs, and demisting control is executed. A second predetermined value lower than the first predetermined value by a predetermined amount is determined after the start of the demisting control. When the sensed latest value of the humidity on the inner surface becomes lower than the second predetermined value, it is determined that the mist has been cleared away, and the demisting conrol is stopped.

Abstract: An automatic transmission includes a fluid-pressure differential cylinder for select operation of the transmission and a fluid-pressure differential cylinder for shift operation of the transmission, each of the differential cylinders being built up into one block and joined with the mating differential cylinder with intake and discharge holes in one block held in communication with intake and discharge holes, respectively, in the other block. A piston rod of each of the differential cylinders has an annular groove and a cylinder block is provided with a locking member engageable with the groove to provide a reference position for the piston rod.

Abstract: In an air conditioning system for vehicles which includes a compressor of a variable capacity type, a comparison is made between a compressor capacity required for an air conditioning control and a compressor capacity required for a demist control. The compressor capacity is controlled so as to be brought to greater one of the compressor capacities compared with each other. Alternatively, when it is judged that a windowpane is misted, the compressor capacity is increased and, simultaneously, the temperature of air blown into the compartment is raised. Alternatively, the compressor capacity is controlled so as to be increased within a range of a set maximum allowable capacity until the mist on the windowpane is cleared off when it is judged that the mist occurs on the windowpane.

Abstract: An automobile air conditioner includes a duct interconnecting a blower unit and a temperature control/air distributing unit having a pair of cooling and heating heat exchangers, the duct having a cross-sectional area gradually increasing toward the temperature control/air distributing unit. The air conditioner preferably has a hot/refrigeration compartment juxtaposed with the duct. In a preferred embodiment, the air conditioner includes a hot air control mode door for controlling a stream of hot air flowing from the heating heat exchanger toward an upper air outlet and a lower air outlet.

Abstract: An air conditioning system includes a refrigerating circuit, and a variable capacity compressor forming part of the refrigerating circuit and having a high pressure zone and a device for varying the delivery quantity thereof in response to pressure in the high pressure zone. A high pressure communication passage communicates the high pressure zone with the refrigerating circuit. A pressure control valve is associated with the high pressure zone and the high pressure communication passage, and is operable in response to the pressure in the high pressure zone to reduce the opening degree of the high pressure communication passage when the pressure in the high pressure zone is lower than a predetermined value.

Abstract: An air conditioning apparatus for a car including a solar radiation sensor having right and left side elements for receiving solar radiation coming from right and left sides of the car, respectively, an arithmetic device for generating a control signal based upon the outputs from both light receiving elements and a control device for driving a plurality of air conditioning devices on the basis of the control signal.