Abstract: Simplifying the controller of hybrid type drive unit. The output of a generator driven by engine is connected directly to a motor 7 through a converter or switching circuit 10 without being charged on any battery. The output of each phase of the generator is inputted to the converter 10. A timing controller 126 controls the conduction phase of a thyristor bridge 101 in the converter 10 so as to adjust the quantity of output power. A synchronous standard for phase control is formed based on output wave of an auxiliary winding 26 of the generator. A voltage detector 124 detects an applied voltage on the motor 7 as a motor rotation speed and the conduction angle is increased or decreased so as to maintain a detected voltage at a target value.

Abstract: An electric vehicle has a control unit having a decelerating control function of decelerating an electric motor disposed on a side of a vehicle body corresponding to a turning direction of the electric vehicle, and an accelerating control function of outputting an accelerating control signal for performing acceleration control to accelerate the electric motor when operation of the electric vehicle is switched from a first traveling mode to a second traveling mode. When the electric motor has a speed not exceeding a predetermined reference speed, the accelerating control function performs the acceleration control such that a level of the accelerating control signal is increased abruptly for a temporary time from the switching of the operation of the electric vehicle from the first traveling mode to the second traveling mode.

Abstract: An oscillation control device for controlling a frequency of an oscillator located at the remote site from a standard laboratory having a standard oscillator. The control device includes: a comparison section to compare a frequency of the frequency signal synchronized with a radio signal produced by a signal processing section with a frequency of a oscillation signal outputted from an oscillator to be controlled, an acquisition section to obtain, through a communication network, a comparison result which is obtained by a comparison of a frequency of the standard oscillator held by the standard laboratory and a frequency of the radio signal, a calculation section to calculate deviation between the frequency of the oscillator to be controlled and the frequency of the standard oscillator based on their comparison, and a control section to control the frequency of the oscillator to be controlled, based on the deviation calculated.

Abstract: A self-propelled snow remover is disclosed which includes travel units capable of turning and moving straight forward, at least one steering member operable to turn the travel units, a snow-removing implement, a lift drive mechanism and a control unit. The control unit controls the lift drive mechanism such that it lifts the snow-removing implement when the steering member is turned and lowers the snow-removing implement when turning of the steering member is stopped.

Abstract: A self-propelled work machine, in which the load of the work unit increases according to an increase in the travel speed. The self-propelled work machine includes electric motors for driving the travel units, an engine for driving the work unit, a work drive instruction unit for instructing the work unit to turn on, and a control unit for controlling the electric motors. The control unit reduces the actual speed of the electric motors by using PID control so that the actual rotational speed of the engine returns to a reference rotational speed when the actual rotational speed of the engine falls below the reference rotational speed in the state in which the work unit is turned on by the work drive instruction unit. The reference rotational speed is a reference value used when the work unit is driven by the engine.

Abstract: A self-propelled snow remover having a snow-removing implement mounted to the front of a machine body so as to be capable of lifting, lowering, and rolling. The self-propelled snow remover includes an alignment operating member and a return operating member mounted to an operating unit. The alignment operating member is provided for both rolling and vertically moving the snow-removing implement and is disposed towards a left or right side with respect to a widthwise center of the machine body. The return operating member is operated as the snow-removing implement is returned automatically to a predetermined reference position and is disposed in the vicinity of the alignment operating member.

Abstract: A walk-behind self-propelled snow-removing machine includes a snow-removing-unit posture control member disposed on an operating section at one side thereof, a travel ready lever comprised of a deadman's lever mounted on one operation handlebar at the other side of the operating section, and a mode selector switch disposed on the operating section and located forwardly of the travel ready lever for selecting one of plural alternative snow removing operation modes that are set in advance in a control unit on the basis of a travel speed of a machine body, a revolving speed of an engine, and an opening of a throttle valve.

Abstract: In the working machine wherein the output of an engine generator is directly supplied to a motor for travel without using the intermediary of a battery, preventing the engine from slowing down. The generator G is directly connected to the motor 7 and there is no battery that stores the output of the generator G. CPU 102 decreases the power supply for the motor 7 when it has been anticipated that the engine revolutions will be decreased. The number of the engine revolutions is detected according to the period of the waveform of an output of the generator G. The alternating current waveform that has been drawn out from one phase of the winding of the generator G is shaped into a rectangular waveform. CPU 102 detects the period of the shaped waveform. When the detected period has become larger, the CPU 102 determines that the engine revolutions is about to decrease.

Abstract: A working machine has a machine body, an engine mounted on the machine body, an electric motor mounted on the machine body, a working part driven by the engine during a working state of the working part for performing a working operation, and a transporting part driven by the electric motor for transporting the working machine during the working operation.

Abstract: In a snow removing machine, left and right running devices and auger housing are mounted on a running-device frame, and the auger housing is rollable by a rolling drive mechanism. In response to operation of a turning operator, a control section performs control to drive the left and right running devices to thereby turn the machine, and the control section also issues a drive instruction to the rolling drive mechanism to roll the auger housing in an inward direction, as viewed in the turning direction of the machine, such that a portion of one of the opposite side edges of the auger housing, located inwardly of the other side edge as viewed in the turning direction, is brought into contact with the ground surface.

Abstract: The invention makes an output sharing of an engine and an electric motor proper so as to suitably drive a load. When a throttle opening degree variation amount ?V is within a ?V1, an engine E can drive a power generator G at a rated revolution speed. A switching circuit 28 is switched in such a manner as to charge a battery 27 by a generated power. When the opening degree variation amount ?V becomes larger than the ?V1, a power assist of operating the power generator G as the electric motor is set to be standby. When the opening degree variation amount ?V is more than ?V2 (>?V1), the power assist is started. In the power assist, an angle advance amount is increased. When acceleration is insufficient, it is possible to further increase a conduction angle in stages.

Abstract: An engine-driven generator G is concurrently used as a starter motor for an engine E that drives a working machine. A motor 25 for motive-power use is a driving source for the working machine to travel. The driving circuit 10 is commonly used between the starter motor G and the motor 25 for travel use. In a starting mode, with switches 35 and 36, the driving circuit 10 is connected to the starter motor G side to start the engine. After complete explosion of the engine, with the switches 35 and 36, the generator G is connected to a regulator 31, while the driving circuit 10 is connected to the motor 25 for travel use. As a result of this, while a battery 14 is electrically charged, the motor 25 for travel use is driven with the battery 14.

Abstract: In an engine drive washing machine, a discharge switch 10 is provided in a jet gun 5. When the switch 10 is turned off, an engine 1 is stopped. When the switch 10 is turned on, the engine 1 is started up to drive a pump 2. When an outlet pressure of the pump 2 is not lower than a predetermined value, a water-discharge valve in the gun 5 is opened to cause the water to be discharged. When the switch 10 is not turned off for a long time, the engine 1 is stopped. When an operator takes up the gun 5 to start the operation, the engine 1 is started up. The engine-drive type of washing machine is provided with a battery 13 for a starter motor, and the battery 13 is charged by a generator function of a starter-motor generator 3 during the operation of the engine 1.

Abstract: A working machine having a working part driven by an engine and a transporting part driven by an electric motor. The rotation of the electric motor is controlled by a control part. The speed of the engine as of when the working part is brought to a working state by a work on/off switch being turned on is taken as a reference speed, and a correction coefficient corresponding to this reference speed is taken as an upper limit value. A correction coefficient corresponding to the present speed of the engine is determined. A required acceleration set in correspondence with the size of the actual travel speed of the transporting part is multiplied by the determined correction coefficient to correct this required acceleration. The control part acceleration controls the rotation of the electric motor in accordance with the corrected required acceleration.

Abstract: A working machine has an engine, a working part driven by motive power from the engine, and a control part for controlling the engine. When operation of the working part has been stopped for a pause in work and the engine is idling, the control part performs control so that the engine automatically stops when a number of conditions are satisfied.

Abstract: An electric vehicle includes left and right electric motors for separately driving left and right traveling apparatuses, respectively, and a control unit for controlling the left and right electric motors, separately. When operation of the electric vehicle is switched from a turning mode to a straight-traveling mode if one of the electric motors disposed on the same side as a turning direction of the electric vehicle has a speed not exceeding a predetermined minimum reference speed, the control unit abruptly increases a level of an accelerating control signal for a temporary time from the switching of operation to abruptly accelerate the one electric motor, such that the speed of the one electric motor can be made close to that of the opposite electric motor in a shorter time.

Abstract: Simplifying the controller of hybrid type drive unit. The output of a generator driven by engine is connected directly to a motor 7 through a converter or switching circuit 10 without being charged on any battery. The output of each phase of the generator is inputted to the converter 10. A timing controller 126 controls the conduction phase of a thyristor bridge 101 in the converter 10 so as to adjust the quantity of output power. A synchronous standard for phase control is formed based on output wave of an auxiliary winding 26 of the generator. A voltage detector 124 detects an applied voltage on the motor 7 as a motor rotation speed and the conduction angle is increased or decreased so as to maintain a detected voltage at a target value.

Abstract: In the working machine wherein the output of an engine generator is directly supplied to a motor for travel without using the intermediary of a battery, preventing the engine from slowing down. The generator G is directly connected to the motor 7 and there is no battery that stores the output of the generator G. CPU 102 decreases the power supply for the motor 7 when it has been anticipated that the engine revolutions will be decreased. The number of the engine revolutions is detected according to the period of the waveform of an output of the generator G. The alternating current waveform that has been drawn out from one phase of the winding of the generator G is shaped into a rectangular waveform. CPU 102 detects the period of the shaped waveform. When the detected period has become larger, the CPU 102 determines that the engine revolutions is about to decrease.

Abstract: An engine-driven generator G is concurrently used as a starter motor for an engine E that drives a working machine. A motor 25 for motive-power use is a driving source for the working machine to travel. The driving circuit 10 is commonly used between the starter motor G and the motor 25 for travel use. In a starting mode, with switches 35 and 36, the driving circuit 10 is connected to the starter motor G side to start the engine. After complete explosion of the engine, with the switches 35 and 36, the generator G is connected to a regulator 31, while the driving circuit 10 is connected to the motor 25 for travel use. As a result of this, while a battery 14 is electrically charged, the motor 25 for travel use is driven with the battery 14.

Abstract: The invention makes an output sharing of an engine and an electric motor proper so as to suitably drive a load. When a throttle opening degree variation amount &Dgr;V is within a &Dgr;V1, an engine E can drive a power generator G at a rated revolution speed. A switching circuit 28 is switched in such a manner as to charge a battery 27 by a generated power. When the opening degree variation amount &Dgr;V becomes larger than the &Dgr;V1, a power assist of operating the power generator G as the electric motor is set to be standby. When the opening degree variation amount &Dgr;V is more than &Dgr;V2 (>&Dgr;V1), the power assist is started. In the power assist, an angle advance amount is increased. When acceleration is insufficient, it is possible to further increase a conduction angle in stages.