An electric power tool includes: a brushless motor having a plurality of stator windings and configured to rotate in accordance with voltages applied to the plurality of stator windings, an induced voltage being generated in accordance with a rotation of the brushless motor; a rectifier circuit configured to rectify an AC voltage; a smoothing capacitor configured to smooth the AC voltage rectified by the rectifier circuit to a pulsation voltage having a maximum value larger than the induced voltage and a minimum value smaller than the induced voltage; and an inverter circuit configured to perform switching operations to output the pulsation voltage to the plurality of stator windings by rotation.

Electric power tool

A vehicle control system which can ensure high reliability, real-time processing, and expandability with a simplified ECU configuration and a low cost by backing up an error through coordination in the entire system without increasing a degree of redundancy of individual controllers beyond the least necessary level. The vehicle control system comprises a sensor controller for taking in sensor signals indicating a status variable of a vehicle and an operation amount applied from a driver, a command controller for generating a control target value based on the sensor signals taken in by the sensor controller, and an actuator controller for receiving the control target value from the command controller and operating an actuator to control the vehicle, those three controller being interconnected via a network. The actuator controller includes a control target value generating unit for generating a control target value based on the sensor signals taken in by the sensor controller and received by the actuator controller via the network when the control target value generated by the command controller is abnormal, and controls the actuator in accordance with the control target value generated by the control target value generating unit.

Vehicle Control System

A heat pump system for a vehicle includes a water cooled condenser that uses a coolant as a heat exchange media and uses waste heat generated from a motor and an electronic device to improve heating performance, efficiency, and dehumidifying performance. A control method is also described.

Heat pump system for vehicle

A driving/braking force manipulation control input of a k-th wheel, which denotes one or more specific wheels among a plurality of wheels of a vehicle, is determined such that a required condition concerning a relationship among a road surface reaction force that may act from a road surface on the k-th wheel on the basis of the detected values or estimated values of a side slip angle and a friction characteristic of the k-th wheel, a feedback control input related to the driving/braking force of the k-th wheel for bringing a difference between a state amount of the vehicle and a reference state amount close to zero, a driving/braking force feedforward control input based on a drive manipulated variable supplied by a driver of the vehicle, and a k-th wheel driving/braking force manipulation control input is satisfied. This arrangement makes it possible to properly control a motion of an actual vehicle to a desired motion while properly considering the characteristics of a road surface reaction force acting from a road surface on a wheel.

Vehicle Control Device

A control device of a hybrid vehicle including an electric motor and an engine as drive force sources, the hybrid vehicle being configured to execute engine running using the engine as the drive force source for running and motor running using the electric motor as the drive force source for running with the engine stopped, the control device having a predefined running performance oriented running mode such as a sport running mode and a predefined large drive force running mode with a lower requirement degree of start acceleration performance as compared to the running performance oriented running mode, in the predefined running performance oriented running mode, the motor running being inhibited, the engine running being performed in an operation range in which the motor running is normally performed, and the engine being retained in an operating state at the time of vehicle stop, and in the predefined large drive force running mode, the motor running being inhibited, the engine running being performed in the operation range in which the motor running is normally performed, and the engine being stopped at the time of vehicle stop

Control device for hybrid vehicle

In a reverse drive with power output from an engine, the control procedure of the invention selects a drive point of the higher rotation speed corresponding to the higher accelerator opening among available drive points that ensure output of a target engine power, and controls the engine to be driven at the selected drive point and ensure output of a torque demand corresponding to the accelerator opening to a drive shaft. A required torque level output from a motor MG2 increases with an increase in engine torque under the conditions of a fixed torque demand of the drive shaft and a fixed output power level of the engine 22. Setting a drive point of the higher rotation speed and the lower torque corresponding to a higher level of the accelerator opening ensures output of the torque demand to the drive shaft. Setting a drive point of the lower rotation speed and the higher torque corresponding to a lower level of the accelerator opening improves the drive feeling of the engine.

Power Output Apparatus, Motor Vehicle Equipped With Power Output Apparatus, And Control Method Of Power Output Apparatus

PROBLEM TO BE SOLVED: To provide a belt type continuously variable transmission that fixes a position of a movable sheave of the belt type continuously variable transmission, and can readily and surely fix a gear ratio to a desirable value. SOLUTION: The belt type continuously variable transmission includes two pulleys 1 forming a belt-winding groove 1a by the movable sheave 3 and a fixed sheave 4 which are movably and non-movably, respectively, installed on a rotary shaft 2 in a direction of a rotation axis AL of the rotary shaft, and a transmission belt 5 winding around each of the pulleys 1 and transmitting a power between each of the pulleys 1. The belt type continuously variable transmission move the movable sheave 3 back and forth in the direction of the rotation axis AL to vary a flute width of the belt-winding groove 1a, thereby a winding radius of the pulley 1 varies and the gear ratio is continuously changed. In the transmission, there is provided a gear ratio fixing device 6 for mechanically fixing the movable sheave 3 on the rotary shaft 2 at a predetermined position which is set beforehand in the direction of the rotation axis AL. COPYRIGHT: (C)2011,JPO&INPIT

Belt type continuously variable transmission

PROBLEM TO BE SOLVED: To secure proper lubricant supply quantity, and to reduce the pumping loss of an engine and the loss of an oil pump while a hybrid car travels by a motor SOLUTION: This control device of a hybrid car is provided with: an engine; two motor generators; and a power distribution device composed of a planetary gear mechanism wherein the oil pump which supplies lubricant to the power distribution device and an engine are connected to a carrier, and one motor generator is connected to a sun-gear, and the other motor generator is connected to a ring gear This control device is provided with a pumping loss reduction means (step S4) for reducing the pumping loss of the engine by controlling throttle valve opening when the hybrid car travels by a motor; and necessary lubricant quantity securing means (steps S5, S7) for supplying the absolute minimum quantity of lubricant by a power distribution device according to a vehicle speed by controlling the rotation of one motor generator to control the flow amount of the oil pump COPYRIGHT: (C)2009,JPO&INPIT

Control device for hybrid car

In a hybrid vehicle, an ECU performs speed-change control and selectively changes a speed-change mode between a stepless speed-change mode and a fixed speed-change mode in accordance with the travel condition of the hybrid vehicle. At this time, in the condition that the fixed speed-change mode is selected, if an accelerator off operation is performed, a release preparing process is performed, and a reaction element which receives the reaction torque of engine torque in a power dividing mechanism is changed to a sun gear on a motor generator side. Moreover, if an accelerator off speed or a brake pedal operation amount exceeds its own reference value, the speed-change mode is transferred into the stepless speed-change mode, predictively and unconditionally, before a normal speed-change condition is met.

Control apparatus for hybrid driving apparatus

A control device of a vehicle includes: power dividing mechanism that has a plurality of rotating elements rotated by torque output and transmitted from an engine and a first motor/generator and switches a transmission mode according to the engaging states of the respective rotating elements; and a clutch that has a first engaging member and a second engaging member having a backlash between them in a rotating direction thereof, and that sets a transmission mode to a fixed transmission ratio mode by engaging the first engaging member connected to one of the rotating elements with the second engaging member, and sets the transmission mode to a continuously variable transmission ratio mode by releasing the engagement. In the control device of a vehicle, the magnitude of the reversed rotating torque is reduced when the direction of rotating torque acting between the first and seconds engaging members.

Control device of vehicle

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