Abstract: An electric drive unit (100) of the invention includes the electric motor (1) and the control apparatus (20) that is disposed on an axis line of a rotation shaft (2) of the electric motor (1) and controls the driving of the electric motor (1). The electric motor (1) has a motor terminal (13) extending parallel to an axial direction of the rotation shaft (2) toward the control apparatus (20) and a slit (13a) is provided to the motor terminal (13) at an end on a side of the control apparatus (20). The control apparatus (20) has a motor connection terminal (34) provided on a line extended from the motor terminal (13) and connected to the motor terminal (13). The slit (13a) in the motor terminal (13) is press-fit and fixed to the motor connection terminal (34).

Abstract: An electric drive unit (100) of the invention includes the electric motor (1) and the control apparatus (20) that is disposed on an axis line of a rotation shaft (2) of the electric motor (1) and controls the driving of the electric motor (1). The electric motor (1) has a motor terminal (13) extending parallel to an axial direction of the rotation shaft (2) toward the control apparatus (20) and a slit (13a) is provided to the motor terminal (13) at an end on a side of the control apparatus (20). The control apparatus (20) has a motor connection terminal (34) provided on a line extended from the motor terminal (13) and connected to the motor terminal (13). The slit (13a) in the motor terminal (13) is press-fit and fixed to the motor connection terminal (34).

Abstract: A control apparatus for a three-phase brushless motor, in which a control circuit includes time interval calculation means (133 in FIG. 4). The time interval calculation means (133) is endowed with at least one time interval calculation mode. In the time interval calculation mode, pluralities of time intervals which correspond to an addition section obtained by adding up two or more Q continuous sections are calculated on the basis of two position detection signals which lie at both the ends of the addition section, among position detection signals successively generated. The control circuit determines pluralities of energization switching timings on the basis of the pluralities of time intervals. The control apparatus for the three-phase brushless motor can decrease the deviations of the energization switching timings attributed to the errors of the mounting positions of position sensors or to the errors of the magnetized positions of a rotor, without requiring any complicated adjustment.

Abstract: A control apparatus for a three-phase brushless motor, in which a control circuit includes time interval calculation means (133 in FIG. 4). The time interval calculation means (133) is endowed with at least one time interval calculation mode. In the time interval calculation mode, pluralities of time intervals which correspond to an addition section obtained by adding up two or more Q continuous sections are calculated on the basis of two position detection signals which lie at both the ends of the addition section, among position detection signals successively generated. The control circuit determines pluralities of energization switching timings on the basis of the pluralities of time intervals. The control apparatus for the three-phase brushless motor can decrease the deviations of the energization switching timings attributed to the errors of the mounting positions of position sensors or to the errors of the magnetized positions of a rotor, without requiring any complicated adjustment.

Abstract: A rotor having magnets composed of rare-earth magnets is rotatably disposed inside an exterior casing, a penetrating aperture is disposed through a first end of the exterior casing relative to a direction of a motor central axis, and a filter is disposed so as to cover the penetrating aperture from a second end of the exterior casing relative to the direction of the motor central axis. A shaft is mounted to a bush by screwing an external thread portion into an internal thread portion. An operating member is mounted integrally onto a second end portion of the shaft projecting outward from a penetrating aperture in a housing. A rotation-regulating projection portion of a guide member fixed to the shaft is fitted loosely into a guide groove disposed so as to extend along an inner wall surface of a central aperture of the housing in the direction of the motor central axis.

Abstract: A rotary electric machine is provided in which the press-fit load of a stator magnetic pole to a frame is stabilized, thus stabilizing the performance of the rotary electric machine, and that has high anti-corrosiveness and anti-rusty sealing property and is inexpensive. Particularly a rotary electric machine suitable for a motor for motor power steering apparatus is provided. In a rotary electric machine having a stator magnetic pole press-fitted and fixed on an inner circumferential surface of a cylindrical frame made of a steel plate and having a rotor arranged via a gap to an inner circumferential side of the stator magnetic pole, the frame is formed by pressing a surface-treated steel plate having a plating layer of aluminum, magnesium, silicon, and zinc for the remaining part formed on a surface of the steel plate, into a cylindrical shape.

Abstract: A vehicle electro-hydraulic power steering unit includes: a steering mechanism steering a steering wheel in a steering direction; an electro-hydraulic pump; a piston mechanism assisting the steering mechanism in a steering direction; a hydraulic circuit causing an assist force to be generated in response to the steering of the steering mechanism; and a control unit controlling a motor based on an output signal from a vehicle speed sensor, a torque sensor, and a steering angle sensor. In this power steering unit, driving the motor is started when a steering torque exceeds a set torque threshold, and the torque threshold to be set is changed depending on operating conditions. Thus, a vehicle electro-hydraulic power steering unit improved in fuel consumption is obtained.

Abstract: A rotary electric machine is provided in which the press-fit load of a stator magnetic pole to a frame is stabilized, thus stabilizing the performance of the rotary electric machine, and that has high anti-corrosiveness and anti-rusty sealing property and is inexpensive. Particularly a rotary electric machine suitable for a motor for motor power steering apparatus is provided. In a rotary electric machine having a stator magnetic pole press-fitted and fixed on an inner circumferential surface of a cylindrical frame made of a steel plate and having a rotor arranged via a gap to an inner circumferential side of the stator magnetic pole, the frame is formed by pressing a surface-treated steel plate having a plating layer of aluminum, magnesium, silicon, and zinc for the remaining part formed on a surface of the steel plate, into a cylindrical shape.

Abstract: A vehicle electro-hydraulic power steering unit includes: a steering mechanism steering a steering wheel in a steering direction; an electro-hydraulic pump; a piston mechanism assisting the steering mechanism in a steering direction; a hydraulic circuit causing an assist force to be generated in response to the steering of the steering mechanism; and a control unit controlling a motor based on an output signal from a vehicle speed sensor, a torque sensor, and a steering angle sensor. In this power steering unit, driving the motor is started when a steering torque exceeds a set torque threshold, and the torque threshold to be set is changed depending on operating conditions. Thus, a vehicle electro-hydraulic power steering unit improved in fuel consumption is obtained.

Abstract: A variable delivery fuel supply device capable of obtaining a stable fuel supply without causing noises resulted from the operation of the electromagnetic valve or a defect of the strength of a supply passage for flowing fuel of low pressure, which comprises fuel injection valves 1a-1d for injecting fuel to respective cylinders of an internal combustion engine, a fuel pump 3 which sucks fuel from a fuel intake port 13 through an intake valve 15 into a pressurizing chamber 24 by a reciprocating movement of a plunger 22 in a cylinder 21 to pressurize the fuel and supplies the pressurized fuel into the fuel injection valves 1a14 1d through a discharge valve 16, a damper chamber 29 having a pressure damper 30, which is communicated with the fuel passage 14 at a position between the fuel intake port 13 and the intake valve 15 in the fuel pump 3, a relief passage 20 for communicating the pressurizing chamber 24 with the fuel passage 14 in the fuel pump 3 and an electromagnetic valve 19 for opening and closing the r

Abstract: A rotor having magnets composed of rare-earth magnets is rotatably disposed inside an exterior casing, a penetrating aperture is disposed through a first end of the exterior casing relative to a direction of a motor central axis, and a filter is disposed so as to cover the penetrating aperture from a second end of the exterior casing relative to the direction of the motor central axis. A shaft is mounted to a bush by screwing an external thread portion into an internal thread portion. An operating member is mounted integrally onto a second end portion of the shaft projecting outward from a penetrating aperture in a housing. A rotation-regulating projection portion of a guide member fixed to the shaft is fitted loosely into a guide groove disposed so as to extend along an inner wall surface of a central aperture of the housing in the direction of the motor central axis.

Abstract: In a variable delivery fuel supply device providing a stable control of fuel pressure without being influenced by a scattering of control of an electromagnetic valve and without causing an increase of temperature in the coil of the electromagnetic valve, the variable delivery fuel supply device comprises fuel injection valves 1a-1d for injecting fuel to respective cylinders of an internal combustion engine, a fuel pump 3 which sucks fuel from a fuel intake passage 25 through an intake valve 26 into a pressurizing chamber 17 by a reciprocating movement of a plunger 15 in a cylinder 14 and discharges the pressurized fuel into the delivery pipe through a discharge valve 27, an electromagnetic valve 28 which is located in a relief passage 31 communicating the pressurizing chamber 17 of the fuel pump 3 with the fuel intake passage 25 and is adapted to control a discharge quantity of fuel by relieving the pressurized fuel in the pressurizing chamber 17 at the time of opening the valve, and a control unit 13 for sup

Abstract: In order to reduce load placed on an engine by suppressing loss of the engine power, the fuel feeding device is arranged to comprise a check valve and a two-port connecting valve and further comprises a branch passage for connecting a portion between the check valve and a deliver side of a pumping element with a low pressure and high pressure passage so that the branch passage is opened through operation of the two-port connecting valve when amount of fuel required by the engine is small.

Abstract: A variable delivery fuel supply device comprising fuel injection valves 1a through 1d injecting a fuel to cylinders of a combustion engine, a fuel pump 3 taking the fuel in a pressurization chamber 17 from a fuel intake passage 25 through an intake valve 26, pressurizing the fuel, and discharging thus pressurized fuel from a discharge valve 27 by a reciprocal motion of a plunger 15 inside a cylinder, an electromagnetic valve 28, formed in a relief passage 31 connecting the pressurization chamber 17 of the fuel pump 3 to the fuel intake passage 25, for controlling a discharge quantity by relieving the pressurized fuel inside the pressurization chamber 17 at the time of opening the injection valves, and a control means 13 applying a valve-opening signal to the electromagnetic valve 28, wherein a width of a time of the valve-opening signal, applied to the electromagnetic valve 28 from the control means 13, is always set at a constant with respect to a period of the reciprocal movement of the plunger 15, whereby

Abstract: A variable delivery fuel supply device capable of obtaining a stable fuel pressure even in a case of inoperability of an electromagnetic valve and capable of improving the durability of the electromagnetic valve, which comprises fuel injection valves 1a through 1d for injecting fuel to respective cylinders of an internal combustion engine, a delivery pipe 2 connected with the fuel injection valves 1a through 1d, a fuel pump 3 which sucks fuel from a fuel intake valve into a pressurizing chamber 23 by a reciprocating action of a plunger 21 in a cylinder 20 and supplies the pressurized fuel into the delivery pipe 2 through a discharge valve 31, an electromagnetic valve 32 located in a relief passage 35 communicating the pressurizing chamber 23 of the fuel pump 32 with the fuel intake port 27 and is adapted to control a discharge quantity of the pressurized fuel by relieving the pressurized fuel in the pressurizing chamber 23 into the fuel intake port 27 at the time of opening the valve to thereby control a fuel

Abstract: A fuel supply apparatus includes: a high-pressure pump driven by an engine and ejecting high-pressure fuel; a delivery pipe storing the high-pressure fuel ejected from the high-pressure pump in a pressurized state; and a high-pressure regulator having a valve and a valve seat, and adjusting the fuel pressure in one of the high-pressure pump and the delivery pipe. At least one of abutment surfaces of the valve and the valve seat is set to have a hardness of Hv800 or more.

Abstract: The present invention relates to a high-pressure fuel pump assembly 200, which supplies high-pressure fuel from a fuel supply port 9 to a delivery pipe 1a, wherein the high-pressure fuel pump assembly 200 comprises: a high-pressure pump 20 having an intake valve 22 and a discharge valve 21; a fuel discharge passage 4 connecting the discharge valve 21 to the fuel supply port 9; and a high-pressure damper 60 disposed in the fuel discharge passage 4; and a first check valve 210, which opens when the pressure on the voluminous chamber side is a fixed value lower than the pressure on the discharge valve side, is provided within the fuel discharge passage 4 between the high-pressure damper 60 and the discharge valve 21. The first check valve may be a ball valve or a reed valve, and a second check valve may be provided between the fuel supply port 9 and the high-pressure damper 60.

Abstract: A check valve and a seating valve incur less deformation of a seat, providing good sealing performance.

Abstract: In a high-pressure fuel pump, a bellows chamber communicates with a fuel tank. A volume chamber having a predetermined volume is arranged in a return passage which returns a fuel stayed in the bellows chamber to the fuel tank. The fuel which has stayed in a region in the return passage can be flowed into the volume chamber to be prevented from flowing back to the bellows chamber.

Abstract: A high-pressure pump unit allowing an oiltight test for a high-pressure piping system after assembly without damaging parts which do not have a pressure resistance construction.