Abstract: A pulse width of a drive pulse of a brushless motor is modulated in correspondence to a setting signal for setting the rotation rate. Switching control for the current supplied to exciting coils is implemented by using an output signal from Hall elements for detecting the position of the rotor and the drive pulse. Correction of the pulse width of the drive pulse is implemented to ensure that the average voltage is maintained at a constant level even when the source voltage fluctuates so that stable rotation can be maintained over the entire rotation rate range even when the source voltage supplied to the brushless motor fluctuates and so that the fuse can be prevented from melting and the motor can be prevented from becoming damaged, which may otherwise be caused by a fluctuating source voltage.

Abstract: In a laminated heat exchanger, an intake portion and an outlet portion for heat exchanging medium are provided at one end portion in the direction of lamination. The intake portion is made to communicate with a most upstream pass distance from the one end portion in the direction of lamination via a communicating pipe, and the outlet portion is made to communicate with the most downstream pass at one end portion in the direction of lamination. The communicating pipe is further made to communicate with an odd-numbered pass in the vicinity where the odd-numbered pass changes from the even-numbered pass that immediately precedes it. In addition, the intake portion at one end portion in the direction of lamination is made to communicate with the pass immediately preceding the most downstream pass.

Abstract: A variable capacity swash plate compressor includes a plurality of pistons slidably received in a plurality of cylinder bores, respectively, a rotating member rigidly fitted on the drive shaft, for rotation in unison with the drive shaft, a swash plate mounted on the drive shaft in a manner tilted with respect to an imaginary plane perpendicular to the drive shaft and axially slidable along the drive shaft, and a linkage interposed between the rotating member and the swash plate, for tiltably connecting the swash plate to the rotating member to cause the swash plate to rotate in unison with the rotating member. The link member is offset by a predetermined amount from a boundary between a compressing piston-side area which receives compression reaction forces from ones of the pistons during the compression stroke and a suction piston-side area which receives tensile reaction forces from ones of the pistons during the suction stroke, toward the compressing piston-side area.

Abstract: In order to achieve an improvement in the recyclability of a heat exchanger by mounting a seal material for sealing the gap between the heat exchanger and the case in which the heat exchanger is mounted without using an adhesive or the like at the heat exchanger and thus facilitating the removal of the seal material, an arrangement for mounting the seal material is provided at a specific position at an external circumferential portion of the heat exchanger. For instance, a guide is provided by inwardly bending the central portion in the direction of airflow of each of the projecting pieces formed at the tube elements at one end in a lengthwise direction or by cutting and raising the central portion perpendicularly. A pair of retaining portions are formed at specific positions at an external circumferential portion located at the sides of the heat exchanger relative to the direction of airflow to hold the two ends of the seal material with the pair of retaining portions.

Abstract: An externally threaded portion 31 of a valve body 10 is threadingly engaged with an internally threaded portion Hb formed on the opening portion side of an attachment hole Ha. A flange portion 32 of the valve body 10 is brought into abutment with an upper surface Hc of the housing H, so that the valve body 10 is fixed to the housing H. A lower end of the valve body 10 is located away from a bottom surface of the attachment hole Ha. A valve seat 23 and a guide hole 24 are formed inside the valve body 10. The valve seat 23 and the guide hole 24 are located on a lower side than the externally threaded portion 31. A valve element 50 is provided inside the valve body 10. This valve element 50 includes a seat portion 51 rest on the valve seat 23, and a guide portion 55 slidably engageable with the guide hole 24. A lower end opening portion of the guide hole 24 is shielded with a shielding plate 25. An orifice 25a is formed in the shielding plate 25.

Abstract: A vane compressor has at least one of a front-side member and a rear-side member thereof formed with a suction chamber opening toward a cam ring, which has a substantially arcuate or annular shape and extends around a drive shaft. The cam ring has one end face formed with a refrigerant inlet port for supplying a low-pressure refrigerant into compression chambers formed between vanes. Alternatively, a front head is arranged on one end face of the cam ring. A shell encloses another end and an outer peripheral surface of the cam ring and holds a movable plate in a state opposed to the other end face of the cam ring such that the movable plate can be moved along a central axis of the drive shaft. An inside of the shell and the movable plate defines a high-pressure chamber therein. Each adjacent pair of the vanes, the front head, and the movable plate defines a compression chamber therein.

Abstract: A device for driving a DC brushless motor by outputting commutation control signals based on voltages induced in the drive windings includes a position detection circuit having low-pass filter circuits that remove a chopping frequency component and have a phase lag of 60-90.degree. at maximum motor rotational speed, a rotational frequency computing section, and a phase correction amount computing section that effects a computation based on the rotational frequency computed by the rotational frequency computing section to set the commutation time point to produce a 30.degree. phase lag in a rotational speed range in which the phase lag falls in the range of 0.degree. to less than 30.degree. and to produce a 90.degree. phase lag in a rotational speed range in which the value of the phase lag falls in the range of 30-90.degree.. The device achieves high efficiency at optimum commutation timing in the high rotational speed region and suppresses vibration and noise in the low rotational speed region.

Abstract: A a cartridge type delivery valve assembly in which a valve seat surface and a valve are integrated in order to assure good seating characteristics in the delivery valve. The delivery valve assembly is formed by fixing together a valve holder provided with delivery holes, a roll valve that is mounted along the internal surface of the valve holder to freely open and close the delivery holes and a valve stopper that fixes the roll valve onto the valve holder and regulates the lift quantity of the roll valve, in an integrated manner using coupling members and the delivery valve assembly thus achieved is mounted in a valve insertion space.

Abstract: In a prescribed low-speed rotation region where a control rack is maintained in a prescribed low-speed side designed position, when a detected position (output voltage) of a rack sensor is offset towards the high load side than the position (voltage) written in a memory, the detected position is written in the memory. In a prescribed high-speed rotation region where a control rack is maintained in a prescribed high-speed side designed position, when a detected position of the rack sensor is offset towards the high load side than the position written in a memory, the detected position is written in the memory. The output characteristic of the rack sensor is calculated based on the detected position written in the memories, and the low-speed side and the high-speed side designed positions. The position of the control rack is calculated from the detected position based on this output characteristic.

Abstract: A reflecting surface is formed at a rear side of a thick portion so that when viewed from the center front relative to the thick portion, light is reflected by the reflecting surface to let the color of the panel be seen as the color of the thick portion. With this, the confusing visual aspect of the window member of the indicator unit that occurs when the color of the thick portion of the window member looks different from the color of the other portion of the window member can be eliminated without having to color the rear surface side of the thick portion.

Abstract: In a spill control apparatus for a fuel injection system in which a sleeve is externally fitted to a rotor, and the position of the sleeve relative to the rotor is used to adjust the communication timing between a port on the rotor and a port on the sleeve, the port formed at the rotor is constituted of a first indented portion formed over a specific angle of rotation and a second indented portion formed to achieve specific spill characteristics. The second indented portion is formed continuous to the front end of the first indented portion in the direction of rotation and the contour of the second indented portion is continuous to the contour of the first indented portion which is constituted of oblique sides which extend toward the front relative to the direction of rotation. The length of the rotor port in the axial direction may be set smaller than the length of the port formed on the sleeve in the axial direction.

Abstract: A motor driving apparatus PWM-controls a DC voltage from a rectifying unit according to a rotation speed setting information, and drives a motor by voltage pulse chooped by PWM. The rectifying unit is controlled so that a full-wave rectification is performed when the motor runs at a rotation speed below a prescribed rotation speed and a voltage-doubler rectification is performed when the motor runs at a rotation speed above the prescribed rotation speed. On the other hand, in case a motor drives a compressor of an air-conditioning system, the rectifying unit is controlled so that the full-wave rectification is performed when the air-conditioning system is a cooling operation and the voltage-doubler rectification is performed when the air-conditioning system is a heating operation.

Abstract: An objective of the present invention is to provide a fuel injection pump wherewith, in addition to main injection, pre-injection is made possible in the vicinity of top dead center in the exhaust stroke, and wherewith, by regulating the pre-stroke, defined as the stroke from bottom dead center of a plunger 2 to the commencement of fuel line pressurization, it is possible to freely control both the pre-injection volume and the pre-injection timing relative to the main injection. Attention having been given to the combining of a pre-stroke varying mechanism together with a two-stage injection mechanism, the present invention is a fuel injection pump that is made so that a pre-stroke is regulated by changing the relative positions, in the axial direction, of a plunger 2 that sends fuel under pressure and a control sleeve 3 that fits around the outside of the plunger 2 so as to slide freely thereon.

Abstract: In order to achieve an improvement in productivity and a reduction in production costs, tubes are formed using brazing sheet while eliminating the problems normally associated with forming tubes from a brazing sheet. In each of the tube elements formed from a brazing sheet, at least one ridge projects out from a surface that is in contact with a fin toward the other surface that is in contact with a fin at the opposite side is formed, thereby achieving an improvement in the pressure withstand performance of the tube elements and in the heat exchanging rate. In addition, flat portions where no ridges are formed are provided at the two ends of each tube element to facilitate the work of mounting the tube elements. Moreover, the distance between the header pipes and the ridge end portions is set within a range of 2 mm to 10 mm, in order to ensure good balance between the pressure withstand performance and effective brazing.

Abstract: When a difference in opening angle of an air-mixing door between a target position and an actual position is larger in value than a width of an insensitive band area, a mixing door actuator is driven to a heating side or a cooling side depending on the amount of the difference so as to have the air-mixing door reach its target position in a condition in which the insensitive band area is eliminated. When the difference is smaller than the predetermined band width, i.e., when a drive position of the mixing door actuator is in the insensitive band width, this band width is effected so that the mixing door actuator is stopped in operation to stabilize the operation.

Abstract: An object of preventing a reduction in the output efficiency of a motor in the high speed rotation range and reducing the noise of the motor in the low speed rotation range is to be achieved. Since, if a signal that corresponds to the rotation rate has a value equal to or smaller than a specific value, the timing with which a switch performs switching is retarded relative to the timing used when the signal corresponding to the rotation rate has a value larger than the specific value, once the operation shifts to the low speed rotation range, the switching timing is retarded to shift from the setting that gives priority to efficiency, to the setting for achieving noise reduction as long as the switching timing is set in advance so that an optimal output efficiency is achieved in the high speed rotation range.

Abstract: A support perpendicular to a rotational axis of a housing is secured to one of one of first side gears. One pair of second planet gears are rotatably mounted on the support shaft. The one pair of second planet gears are meshed with one pair of second side gears. A second and a third output shaft are connected respectively to the one pair of second side gears. A first output shaft is connected to the other first side gear.

Abstract: In order to prevent the performance of a motor from deteriorating due to a change in which the rotation rate of its rotor is to be increased suddenly, in a brushless motor in which a drive pulse whose pulse width is modulated in correspondence to a rotation rate setting signal input from the outside is formed and switching control is performed on the current supplied to the exciting coils by using output signals from the Hall elements that detect the position of the rotor and the drive pulse, the pulse width of the drive pulse is changed gradually and greatly until it reaches the pulse width that corresponds to the rotation rate setting signal when the upward change in the rotation rate of the rotor is to be large.

Abstract: Only a first EEPROM 2 can output data according to an output signal of a selector circuit 5 when a "High" logical value signal and a "Low" logical value signal are output from first and second input/output terminals of a CPU 1 respectively. Conversely, only a second EEPROM 3 can output data according to the output signal of the selector circuit 5 when the "Low" logical value signal and the "High" logical value signal are output from the first and second input/output terminals respectively. The selector circuit 5 causes all the EEPROMs 2, 3 to turn into their inoperative states when the "High" logical value signals or the "Low" logical value signals are output from both the first and second input/output terminals respectively.

Abstract: A vane compressor includes a rotor. The rotor is rotatably received in a cam ring. A first side member is secured to one end face of the cam ring. A second side member is secured to another end face of the cam ring. A high-pressure chamber is formed within the first side member. The cam ring has at least one high-pressure space formed therein which opens in the one end face of the cam ring in a manner such that the at least one high-pressure space directly communicates with the high-pressure chamber.