초록 ▼

A controller for controlling the rotation of a motor is disposed inside a casing of a power unit for transmitting the rotation of the motor to a driving wheel. An induction-type switch for operating the controller is provided inside the casing of the power unit. A power source converter is provided

A controller for controlling the rotation of a motor is disposed inside a casing of a power unit for transmitting the rotation of the motor to a driving wheel. An induction-type switch for operating the controller is provided inside the casing of the power unit. A power source converter is provided for driving electrical equipment on the vehicle, and is disposed inside the casing of the power unit. Further, an accelerator opening sensor for detecting the magnitude of an output demand for the motor is provided, and is disposed inside the casing of the power unit. This arrangement concentrates the mass into the power unit, and encloses the high voltage system within the power unit.

대표청구항 ▼

A controller for controlling the rotation of a motor is disposed inside a casing of a power unit for transmitting the rotation of the motor to a driving wheel. An induction-type switch for operating the controller is provided inside the casing of the power unit. A power source converter is provided

A controller for controlling the rotation of a motor is disposed inside a casing of a power unit for transmitting the rotation of the motor to a driving wheel. An induction-type switch for operating the controller is provided inside the casing of the power unit. A power source converter is provided for driving electrical equipment on the vehicle, and is disposed inside the casing of the power unit. Further, an accelerator opening sensor for detecting the magnitude of an output demand for the motor is provided, and is disposed inside the casing of the power unit. This arrangement concentrates the mass into the power unit, and encloses the high voltage system within the power unit. gainst the workpiece by determining whether a first signal and a subsequent signal generated by the sensor have occurred within a pre-determined interval of time, wherein if the time between the signals is greater than the pre-determined interval of time, the control device determines that the first signal occurred before the fastener has reached the seated position against the workpiece. 8. A power tool adapted to tighten a fastener, comprising; a motor, a hammer rotatably driven by the motor, an anvil operably disposed to continuously contact and be driven by the hammer during a normal tightening operation and to be struck by the hammer when an elevated torque is generated, a sensor detecting impact sounds generated by the hammer striking the anvil in order to generate an elevated torque and a microprocessor in communication with the sensor and the motor, the sensor communicating detected impact signals to the microprocessor each time that the hammer strikes the anvil, wherein the microprocessor contains an operating program that determines, based upon the detected impact signals, whether each detected impact sound was generated either (1) before the fastener has reached a seated position against a workpiece or (2) after the fastener has reached the seated position against the workpiece, and wherein the microprocessor is further programmed to automatically stop the motor based only upon detected impact signals that are determined to have occurred after the fastener has reached the seated position against the workpiece. 9. A power tool as in claim 8, wherein the microprocessor is programmed to start a timer when the microprocessor determines that the hammer has struck the anvil after the fastener has reached the seated position against the workpiece, and stops the motor when the timer reaches a pre-selected amount of time, and wherein the microprocessor is further programmed to re-set the timer to zero when the microprocessor determines that the hammer has struck the anvil before the fastener has reached the seated position against the workpiece. 10. A power tool as in claim 9, wherein the microprocessor is programmed to determine that the fastener has reached the seated position against the workpiece by determining whether a first detected impact signal and a subsequent detected impact signal have occurred within a pre-determined interval of time, which pre determined interval of time is stored in the microprocessor, wherein if the time between the signals is greater than the pre-determined interval of time, the microprocessor determines that the first signal occurred before the fastener has reached the seated position against the workpiece. 11. A power tool as in claim 8, wherein the microprocessor is programmed to start a counter in order to count the number of detected impact signals after the fastener has reached the seated position and stops the motor when a pre-determined number of detected impact signals have been counted, the pre-determined number of detected impact signals being stored in the microprocessor, and wherein the microprocessor is programmed to re set the counter to zero when the microprocessor determines that the hammer has struck the anvil before the fastener has reached the seated position against the workpiece. 12. A power tool as in claim 11, wherein the microprocessor is programmed to determine that the fastener has reached the seated position against the workpiece by determining whether a first detected impact signal and a subsequent detected impact signal have occurred within a predetermined interval of time, which pre-determined interval of time is stored in the microprocessor, wherein if the time between the signals is greater than the pre-determined interval of time, the microprocessor determines that the first signal occurred before the fastener has reached the seated position against the workpiece. 13. A power tool comprising: a drive source, a control device for controlling the