A power tool includes an output shaft configured to rotate about a longitudinal axis, a motor drivably connected to the output shaft to impart rotary motions thereto, and a rotational motion sensor spatially separated from the output shaft and operable to determine the user-imparted rotational motion of the power tool with respect to the longitudinal axis. A controller is electrically connected to the rotational motion sensor and the motor. The controller determines angular velocity of the power tool about the axis, rotational displacement of the power tool about the axis, and/or a direction of the rotational displacement using input from the rotational motion sensor. The controller then controls the motor according to the angular velocity, the rotational displacement, and/or the direction of the rotational displacement.

Power screwdriver having rotary input control

A power tool includes a housing, a motor, an output member driven by the motor, and a reaming attachment coupled to the output member. The reaming attachment has a front end portion selectively driven in rotation by the output member to drive a fastener into a workpiece, and a reaming portion selectively driven in rotation by the output member to remove material from an end surface of a conduit. A rotational motion sensor in the housing is operable to detect rotational motion of the housing about an axis. A controller receives a signal indicative of rotational motion from the sensor, determines a direction of the rotational motion of the housing, and drives the motor in a direction corresponding to the direction of rotational motion of the housing.

Power tool having rotary input control

A swash plate 20 made of an aluminum-based material
is allowed to be inclined in the axial direction of a
rotary shaft 18 and to rotate integrally with the rotary
shaft 18 due to the engagement between guide holes 251
formed in the support arms 25 made of an iron-based
material and heads 231 of to-be-guided pins 23 made of an
iron-based material. The inclination of the swash plate
20 is guided based upon a slide guide relationship
between the guide holes 251 and the to-be-guided pins 23
and upon a slide support action of the rotary shaft 18.
The inclination-limiting protuberances 191 integrally
formed on the rotary support member 19 made of the iron-based
material come into contact with the to-be-guided
pins 23. The swash plate 20 is inclined at a maximum
angle in a state where the inclination-limiting
protuberances 191 come into contact with the to-be-guided
pins 23.

Variable displacement compressor

A stability control system 24 for an automotive vehicle as includes a plurality of sensors 28-37 sensing the dynamic conditions of the vehicle and a controller 26 that controls a distributed brake pressure to reduce a tire moment so the net moment of the vehicle is counter to the roll direction. The sensors include a speed sensor 30 , a lateral acceleration sensor 32 , a roll rate sensor 34, and a yaw rate sensor 20. The controller 26 is coupled to the speed sensor 30, the lateral acceleration sensor 32, the roll rate sensor 34, the yaw rate sensor 28. The controller 26 determines a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate. The controller 26 changes a tire force vector using brake pressure distribution in response to the relative roll angle estimate.

Roll over stability control for an automotive vehicle

A motor-driven compressor includes a compression unit, an electric motor, a housing, a cover, wherein the cover includes a main body and a connector coupler, and the cover and the housing define an accommodating chamber, a motor driving circuit that is accommodated in the accommodating chamber and includes a circuit board, and a metal terminal held in the connector coupler, wherein the metal terminal includes first and second end portions. The cover has a shield including a first shield portion, which blocks electromagnetic noise and forms at least part of the connector coupler, and a second shield portion, which blocks electromagnetic noise and forms at least part of the main body. The first and second shield portions are coupled to each other. The second shield portion includes an insertion hole into which one of the first and second end portions of the metal terminal is insertable.

Motor-driven compressor

The invention relates to an injector used for an internal combustion engine, in which a favorable magnetic attraction force is obtained to reduce a controllable minimum injection amount of a fuel injection amount. In a fuel injection valve in which a fixed core (107) and a moving element (114) is contained inside a pipe-shaped member (101), and a coil (105) and a yoke (103) are provided on an outer side thereof, a space for placing the coil (105) is placed so that an inner circumference length in a vertical section of the space becomes smaller than an outside diameter of the yoke (103), or a height of the space in an axial direction of the fixed core (107) becomes smaller than a diameter of the fixed core (107).

Electromagnetic fuel injection valve

An apparatus for detecting an angular rate of a moving body has first and second sensors each of which has a detection direction, the first and second acceleration sensors are mounted at fixed locations on a moving body so that the first and second acceleration sensors have substantially the same detection direction on a plane and a fixed distance therebetween in the detection direction, and the angular rate (ω) of the moving body is detected according to the following equation: ##EQU1## wherein ΔG is an acceleration difference and R is the distance between the first and second acceleration sensors in the detection direction.

Angular rate detection apparatus, acceleration detection apparatus and movement control apparatus, of moving body

To substantially prevent vibrations from arising due to a torque fluctuation of an internal combustion engine, a torque fluctuation of the internal combustion engine is detected, and a torque to be absorbed or generated by a motor generator is controlled so as to decrease the fluctuation torque according to a fluctuation torque information of at least one previous engine cycle.

Internal combustion engine equipped with a torque controller

The variable capacity swash plate compressor of the present invention includes a rotary swash plate having an eccentric mass located opposite to the driving point of the swash plate with respect to the axis of the same. The mass distribution in the rotary swash plate is established such that, within a range in which the piston stroke is less than a predetermined value, a moment about a pivot point produced by the rotation of the swash plate becomes larger than a moment produced by the reciprocating motion of pistons, piston rods and the like and acting upon the swash plate, while, within a range in which the stroke is larger than the predetermined value, the former moment becomes smaller than the latter moment. Accordingly, it is possible to provide a compressor of the type in which its capacity control characteristics are improved over a wide shaft speed range.

Variable capacity swash plate compressor

A motor-driven compressor used as a compressor or high-pressure gas generator for a refrigerating cycle, in which the output torque of the electric motor for driving the compressor is controlled so as to make the output torque agree with the load torque required for performing compression in any revolutional angular position of the driving main shaft to thereby reduce revolutional torsional vibrations caused by disagreement between the load torque and the output torque.

Yozo Nakamura

Papers

Electromagnetic fuel injection valve

Angular rate detection apparatus, acceleration detection apparatus and movement control apparatus, of moving body

Internal combustion engine equipped with a torque controller

Variable capacity swash plate compressor

Motor-driven compressor provided with torque control device