Abstract: Provided are a throttle control device for an internal combustion engine and a throttle control method for an internal combustion engine, which are capable of avoiding occurrence of overshoot of a supercharging pressure at the time of deceleration to improve durability of components in an engine equipped with a supercharger. The engine equipped with the supercharger includes a bypass passage which bypasses a turbine of the supercharger. In the bypass passage, a wastegate valve for adjusting a flow-path area of the bypass passage by a wastegate actuator is provided. An ECU (50) increases the flow-path area of the wastegate valve for deceleration to be started during a high-load operation and closes a throttle valve after confirming that a throttle-valve upstream pressure becomes lower than a predetermined value. As a result, the overshoot of the throttle-valve upstream pressure can be avoided reliably.

Abstract: A fly-fishing reel has a reel body with a reversible pawl and an arbor. A spindle shaft with a gear rotates on the arbor, the gear and pawl limiting the direction of rotation. A spool and lockably engaged drive plate rotate on the spindle shaft and are secured thereon by a drag capsule which attaches to the spindle shaft. Tightening the drag capsule on the spindle shaft forcibly engages friction surfaces on the spindle shaft, the spool, the drive plate, and the drag capsule to provide an adjustable dual disk drag mechanism, as well as securing the drive plate and spool together. The spool can be readily replaced with a different spool and the spools are preferably reversible on the spindle shaft. A winding handle is attached to the drive plate to provide direct-drive action, or is attached to the drag capsule to provide a non-return action.

Abstract: A micro-motor position controller utilizes a ratiometric position sensor that operates independent of any reference voltage sources. A first capacitor and a second capacitor in a micro-motor are connected in series and form one section of a capacitive bridge. The other section of the bridge is ground. A first sinusoidal voltage is created at the top of the capacitive bridge and a second sinusoidal voltage that is 180 degrees out of phase from the first sinusoidal voltage is created at the bottom of the bridge. The motor is moved and the capacitance values of the first and second capacitors are changed until, ultimately, there is no voltage present on the armature of the motor. The voltage level present at the armature is measured relative to AC ground, and is used as an error signal to control the position of the motor.

Abstract: A switched reluctance motor is provided with a rotor position detecting apparatus for detecting a rotor position wherein the apparatus comprises a rotor position-sensing mechanism removably mounted in a ventilator hole formed in a side wall of a motor housing for enabling an easy replacement of printed circuit boards and photo-interrupters when they need to be repaired and maintained. The sensing mechanism includes a fixing member having spaced slots for receiving respective circuit boards.

Abstract: An actuator for automotive HVAC control is coupled to a remote controller by two wires. The controller applies power to the actuator in a high current or a low current mode. A variable resistance driven by the actuator generates a voltage proportional to position in the low current mode. Zener diodes in the actuator circuit prevent motor operation in the low current mode and permit motor operation in the high current mode. A microprocessor in the controller selects the mode and reads the voltage in low mode to determine position. It controls the motor for a duration required to reach a desired position and then checks the new position to verify that the target has been reached. If not, another iteration is employed to reach the target.

Abstract: A motor actuator for preventing a motor from drawing excess current for longer than a predetermined time delay period including dynamic brakes for simultaneously braking motor rotation when motor operation is terminated for any reason. Source voltage supplies an input to a voltage regulator which in turn supplies a regulated voltage to the motor. The actuator includes a comparator circuit that has one input connected to motor supplied regulated voltage and a second input connected to the source voltage with the voltage level from source voltage adjusted to a level that is equal to the regulated motor voltage level under normal motor operational loads. When the motor draws excessive current the voltages on the comparator inputs become unequal which causes the comparator to have an output voltage. An RC circuit from the comparator output to ground potential delays the comparator output voltage for a predetermined time.

Abstract: A simple speed controller for small direct current motors having a hollow body with a joystick extending out from the body. Within the housing the two facing side walls have nonconductive substrates with conductive traces. Transistors are connected to both substrates and the joystick has conductors to act as wipers for potentiometers which act to control the speed of the motor.

Abstract: A circuit for driving a motor used to control the HVAC blend door in an automobile is disclosed. The circuit includes an amplifier circuit, an motor, and a three state driver circuit. The driver circut includes three NPN bipolar transistors and two PNP bipolar transistors configured such that the output of the three state driver circuit is turned off if the input is at a intermediate voltage. The output of the three state driver circuit is at a high voltage if the input is at a low voltage. Conversely, the output of the three state driver circuit is at low voltage when the input is at a high voltage.

Abstract: An electric switch system for a DC motor powered power tool, comprising: a moveable block which is adapted to be manually displaced between a first position and a second position for speed control of the motor; a fixed block arranged adjacent to the first moveable block; a manual selection lever pivotally attached to the fixed block and adapted to be manually rotated from a neutral middle position to either side for the selection of the rotational direction of the motor; a cam structure for permitting the manual rotation of the manual selection lever in either direction away from the middle neutral position only when the moveable block is at the first position and keeping the angularly displaced state of the manual selection lever when the moveable block is displaced away from the first position. Thus, the selection of the rotational direction of the motor and the speed control of the motor can be accomplished as a continuous single operation, and the convenience of the power tool is improved.

Abstract: A non-linearly operating control arrangement for driving units, such as those of damping devices of printing machines, includes a plurality of parallel resistance-diode bridges having two inputs and two outputs, a pair of resistors interposed between one of the inputs and the respective outputs, and a potentiometer interposed between the outputs and having a wiper connected to the other input via a diode. The first outputs of all bridges are connected to the input of a summation member and the output of the latter, together with the second outputs of all bridges, is connected to the input of an amplifier whose output voltage controls the driving unit speed of rotation. Comparison potentials of different magnitudes are supplied to the second inputs of the bridges from a series of additional potentiometers respectively associated with the bridges. Another potentiometer is provided which supplies additional potential to the input of the amplifier.

Abstract: A motor control system for controlling the speed and direction at which a motor operates. A drive circuit is provided for supplying a drive current to the motor, the magnitude of the drive current being determinative of the speed at which the motor operates. A direction-determining circuit determines the direction at which the motor operates and, for example, may comprise a steering circuit for steering the drive current to the motor in first and second current paths. A potentiometer having a resistance connected between first and second terminals and an adjustable wiper which is settable along the resistance is used to determine the desired speed and direction of operation of the motor. The setting of the wiper includes a predetermined zero speed setting which, preferably, is at some intermediate point along the resistance. A power supply having a power terminal and a reference terminal produces an operating potential across these terminals.

Abstract: By comparing with the magnitude of a sea-level reference parameter, an electrical parameter in a pressure-temperature sensor or sensors coupled to the air induction system of an internal combustion engine, particularly a turbocharged engine, a control signal may be derived which will automatically adjust the flow of exhaust gas to the turbocharger and will automatically result in constant engine power from sea level to a critical altitude.