Abstract: A range switching apparatus of a shift-by-wire system has: a main motor; a deceleration mechanism that amplifies torque generated by the main motor; an output shaft that outputs the torque amplified by the deceleration mechanism; an auxiliary motor; and an emergency drive mechanism. The emergency drive mechanism is disposed on the auxiliary motor shaft of the auxiliary motor, and that is connected to or disconnected from the deceleration mechanism by driving of the auxiliary motor. The emergency drive mechanism transfers output of the auxiliary motor to the deceleration mechanism, and rotates the output shaft by being connected to the deceleration mechanism.

Abstract: There is obtained an automatic transmission control apparatus that makes it possible that even when an abnormality occurs in a sensor for detecting a motor rotation angle or the like, control of an automatic transmission is appropriately performed. Inputted first, second, and third detection signals are compared with one another; it is determined that at least two detection signals, out of these detection signals, that coincide with each other are normal and another detection signal is abnormal; then, based on the result of the determination, switching of the ranges of the automatic transmission is controlled.

Abstract: There is provided a range switching device that can switch the shift ranges by use of a mechanical driving force source even when the motor does not normally function. The range switching device includes an output axle coupled with the shift shaft of an automatic transmission, a motor, an elastic driving device whose driving force source is elastic energy of an elastic member, and a coupling mechanism that couples the output axle, the motor, and the elastic driving device with one another; the elastic driving device has a holding mechanism in which there can be performed switching between a holding state where accumulated elastic energy is held and a releasing state where the elastic energy is released so as to drive the output axle.

Abstract: A range switching apparatus of a shift-by-wire system has: a main motor; a deceleration mechanism that amplifies torque generated by the main motor; an output shaft that outputs the torque amplified by the deceleration mechanism; an auxiliary motor; and an emergency drive mechanism. The emergency drive mechanism is disposed on the auxiliary motor shaft of the auxiliary motor, and that is connected to or disconnected from the deceleration mechanism by driving of the auxiliary motor. The emergency drive mechanism transfers output of the auxiliary motor to the deceleration mechanism, and rotates the output shaft by being connected to the deceleration mechanism.

Abstract: There is obtained an automatic transmission control apparatus that makes it possible that even when an abnormality occurs in a sensor for detecting a motor rotation angle or the like, control of an automatic transmission is appropriately performed. Inputted first, second, and third detection signals are compared with one another; it is determined that at least two detection signals, out of these detection signals, that coincide with each other are normal and another detection signal is abnormal; then, based on the result of the determination, switching of the ranges of the automatic transmission is controlled.

Abstract: A compact and lightweight range switching apparatus is provided by suppressing the increase in the size of components in the range switching apparatus. The range switching apparatus includes: a motor mounted in a housing; a pinion placed on a shaft of the motor; a sector-shaped gear wheel having an opening inside which a gear engaging the pinion is formed; and an output shaft rotatably supporting the gear wheel in the housing.

Abstract: There is provided a range switching device that can switch the shift ranges by use of a mechanical driving force source even when the motor does not normally function. The range switching device includes an output axle coupled with the shift shaft of an automatic transmission, a motor, an elastic driving device whose driving force source is elastic energy of an elastic member, and a coupling mechanism that couples the output axle, the motor, and the elastic driving device with one another; the elastic driving device has a holding mechanism in which there can be performed switching between a holding state where accumulated elastic energy is held and a releasing state where the elastic energy is released so as to drive the output axle.

Abstract: A movable body that has a cylinder and a valve apparatus is accommodated inside an accommodating chamber of a pump body so as to cover a discharging orifice. A piston sucks a fluid into the movable body, and discharges the fluid from inside the movable body to the discharging orifice by being slid reciprocally through a piston sliding aperture of the cylinder. A relieving passage that communicates between a suction volume space of the accommodating chamber and the discharging orifice is formed between an inner surface of the accommodating chamber and the movable body by the movable body moving away from the discharging orifice in opposition to a force from a forcing body.

Abstract: Provided is a range change device which includes a main motor and an auxiliary motor, a sun gear which is joined to a motor shaft of the main motor, an auxiliary gear which is joined to a motor shaft of the auxiliary motor, a plurality of planetary gears which are engaged with the sun gear, an annular gear in which internal teeth engaged with the planetary gears and external teeth engaged with the auxiliary gear are formed, a carrier which supports the planetary gears in a state where the carrier allows the planetary gears to rotate and revolve and is rotatable on an external circumference of the motor shaft, a small gear which is mounted on the carrier and rotates about an axis of the motor shaft, and a large gear which is engaged with the small gear.

Abstract: A compact and lightweight range switching apparatus is provided by suppressing the increase in the size of components in the range switching apparatus. The range switching apparatus includes: a motor mounted in a housing; a pinion placed on a shaft of the motor; a sector-shaped gear wheel having an opening inside which a gear engaging the pinion is formed; and an output shaft rotatably supporting the gear wheel in the housing.

Abstract: Provided is a range change device which includes a main motor and an auxiliary motor, a sun gear which is joined to a motor shaft of the main motor, an auxiliary gear which is joined to a motor shaft of the auxiliary motor, a plurality of planetary gears which are engaged with the sun gear, an annular gear in which internal teeth engaged with the planetary gears and external teeth engaged with the auxiliary gear are formed, a carrier which supports the planetary gears in a state where the carrier allows the planetary gears to rotate and revolve and is rotatable on an external circumference of the motor shaft, a small gear which is mounted on the carrier and rotates about an axis of the motor shaft, and a large gear which is engaged with the small gear.

Abstract: A movable body that has a cylinder and a valve apparatus is accommodated inside an accommodating chamber of a pump body so as to cover a discharging orifice. A piston sucks a fluid into the movable body, and discharges the fluid from inside the movable body to the discharging orifice by being slid reciprocally through a piston sliding aperture of the cylinder. A relieving passage that communicates between a suction volume space of the accommodating chamber and the discharging orifice is formed between an inner surface of the accommodating chamber and the movable body by the movable body moving away from the discharging orifice in opposition to a force from a forcing body.

Abstract: The objective of the present invention is to realize the structure, of a fuel injection valve, in which bouncing of the needle can be suppressed and the armature position can be fixed while the valve is closed, without increasing the number of components and the number of processes. In a fuel injection valve including an armature that is repelled or attracted by a core, by de-energizing or energizing a coil, a needle that opens or closes a valve seat in accordance with a reciprocal travel of the armature, and a valve-closing spring that biases the needle so as to close the valve, when the coil is de-energized, the valve-closing spring is disposed on the armature, and the needle and the armature are fixed in such a way that the armature can travel in an axis direction by a predetermined amount with respect to the needle.

Abstract: A fuel injection valve has a first and a second injection ports whose central axes are parallel to each other, the central axis of the second injection port is out of alignment with respect to the central axis of the first injection port so that, when the largest length M1 of a longer-side line along which a plane including the central axis of the valve seat member and the central axis of the second injection port intersects with an inner wall of the second injection port is larger than the shortest length M2 of a shorter-side line along which the above plane intersects with an inner wall of the second injection port, the distance W1 from the inner wall of the first injection port to the longer-side line of the second injection port as measured within the plane is larger than the distance W2 from the inner wall of the first injection port to the shorter-side line of the second injection port as measured within the plane.

Abstract: The objective of the present invention is to realize the structure, of a fuel injection valve, in which bouncing of the needle can be suppressed and the armature position can be fixed while the valve is closed, without increasing the number of components and the number of processes. In a fuel injection valve including an armature that is repelled or attracted by a core, by de-energizing or energizing a coil; a needle that opens or closes a valve seat in accordance with a reciprocal travel of the armature; and a valve-closing spring that biases the needle so as to close the valve, when the coil is de-energized, the needle and the armature are fixed in such a way that the armature can travel in an axis direction by a predetermined amount with respect to the needle, and the coil is preliminarily energized while the fuel injection valve is closed by the needle.

Abstract: A fuel injection valve includes a valve main body of a hollow tubular shape, a needle valve provided to the valve main body in a slidable manner, a valve seat opposing the needle valve to form a seat portion and having an injection hole formed downstream of the seat portion, and a guide portion provided upstream of the seat portion to guide the needle valve. An annular passage communicating in a circumferential direction is defined between the inner peripheral surface of the valve main body and the outer peripheral surface of the guide portion and a fuel passage through which to introduce a fuel from the annular passage to the seat portion is defined. An almost cylindrical filter to trap foreign matter heading toward the fuel passage is provided to the annular passage.

Abstract: A fuel injection valve includes a valve main body of a hollow tubular shape, a needle valve provided to the valve main body in a slidable manner, a valve seat opposing the needle valve to form a seat portion and having an injection hole formed downstream of the seat portion, and a guide portion provided upstream of the seat portion to guide the needle valve. An annular passage communicating in a circumferential direction is defined between the inner peripheral surface of the valve main body and the outer peripheral surface of the guide portion and a fuel passage through which to introduce a fuel from the annular passage to the seat portion is defined. An almost cylindrical filter to trap foreign matter heading toward the fuel passage is provided to the annular passage.

Abstract: The objective of the present invention is to realize the structure, of a fuel injection valve, in which bouncing of the needle can be suppressed and the armature position can be fixed while the valve is closed, without increasing the number of components and the number of processes. In a fuel injection valve including an armature that is repelled or attracted by a core, by de-energizing or energizing a coil; a needle that opens or closes a valve seat in accordance with a reciprocal travel of the armature; and a valve-closing spring that biases the needle so as to close the valve, when the coil is de-energized, the needle and the armature are fixed in such a way that the armature can travel in an axis direction by a predetermined amount with respect to the needle, and the coil is preliminarily energized while the fuel injection valve is closed by the needle.

Abstract: The objective of the present invention is to realize the structure, of a fuel injection valve, in which bouncing of the needle can be suppressed and the armature position can be fixed while the valve is closed, without increasing the number of components and the number of processes. In a fuel injection valve including an armature that is repelled or attracted by a core, by de-energizing or energizing a coil, a needle that opens or closes a valve seat in accordance with a reciprocal travel of the armature, and a valve-closing spring that biases the needle so as to close the valve, when the coil is de-energized, the valve-closing spring is disposed on the armature, and the needle and the armature are fixed in such a way that the armature can travel in an axis direction by a predetermined amount with respect to the needle.

Abstract: A fuel injection valve has a first and a second injection ports whose central axes are parallel to each other, the central axis of the second injection port is out of alignment with respect to the central axis of the first injection port so that, when the largest length M1 of a longer-side line along which a plane including the central axis of the valve seat member and the central axis of the second injection port intersects with an inner wall of the second injection port is larger than the shortest length M2 of a shorter-side line along which the above plane intersects with an inner wall of the second injection port, the distance W1 from the inner wall of the first injection port to the longer-side line of the second injection port as measured within the plane is larger than the distance W2 from the inner wall of the first injection port to the shorter-side line of the second injection port as measured within the plane.