Showing papers on "Prime mover published in 1998"

Power output device and method of stopping prime mover in the power output device

Abstract: A power output device is provided with a planetary gear, an engine having a crank shaft coupled to the planetary gear, a motor secured to a sun gear and a motor secured to a ring gear. Even if there is no need to continue operation of the engine, the engine is not immediately stopped in view of the charge amount of a battery. For example, in the D (drive) range, a processing for stopping rotation of the engine with a predetermined deceleration is performed only if an ABS device is out of operation, the cancellation of reaction force is possible and the vehicle speed is within a predetermined range. Consequently, it is possible to stop the engine while preventing the reaction force from causing a sense of shock to the driver.

Driving system for a working vehicle

Abstract: A vehicle driving system comprises unsteerable drive wheels (5), steerable drive wheels (6), a first hydraulic pump (P1) driven by a prime mover (E), a first hydraulic motor (M1) fluidly connected to the first hydraulic pump (P1), and a multi-step transmission (3) drivingly interposed between the first hydraulic motor (M1) and the unsteerable drive wheels (5). A second hydraulic pump (P2) is driven by the multi-speed transmission (3), and a second hydraulic motor (M2) is fluidly connected to the second hydraulic pump (P2) so as to drive the steerable drive wheels (6), wherein an output force of the second hydraulic motor (M2) is changed when the steerable drive wheels (6) are steered.

Internal combustion engine control apparatus of hybrid powered vehicle

Abstract: A hybrid powered vehicle including an internal combustion engine and an electric motor is constructed to activate earlier an exhaust gas purifying catalyst without any decline of drivability. The hybrid powered vehicle has an electric power generating unit driven by the internal combustion engine, an electric power accumulating element for accumulating the electric power generated by the electric power generating unit, an electric motor, for driving wheels, of which a driving source is the electric power generated by the electric power generating unit or the electric power accumulated in the electric power accumulating element, a power distributing mechanism for distributing the driving force outputted from the internal combustion engine to the electric power generating unit and the wheels, a warm-up operation control unit for controlling a warm-up operation of the internal combustion engine when the internal combustion engine is started up under a predetermined condition, and an operation state switching unit for switching, when a high-output operation request of the internal combustion engine occurs during the warm-up operation of the internal combustion engine by the warm-up operation control unit, the internal combustion engine from the warm-up operation state to a high-output operation state.

Handling device for power working machine

Abstract: A handling device for a power working machine provided rotatably with a rear handle portion, wherein the handling device is constructed such that the rotation of the rear handle portion is always locked whenever the throttle lever for actuating control member of the prime mover is manipulated, and such that, when the rotation of the rear handle portion is once engaged and fixed, a locking mechanism is actuated to lock the rotation of the rear handle portion. The handling device comprises a throttle lever, attached rotatably to the device and designed to actuate a control member of the prime mover, and a handle-engaging member, designed to be engaged with a mount base of the handling device so as to lock the rotational position of the handling device relative to the mount base.

Dust collector-equipped power cutter

Abstract: A dust collector-equipped power cutter includes a prime mover, a cutter, a dust-sucking fan, and a belt-driven power transmission mechanism for transmitting rotation from the prime mover to the cutting disk and to the dust-sucking fan. The belt-driven power transmission mechanism is constructed such that the rotation of the prime mover is transmitted through a single belt to a cutter-driving pulley for the cutting disk and to a fan-driving pulley for the dust-sucking fan.

Automatic motor vehicle P.T.O. drive control

Abstract: The invention related to a method for engaging power take-offs (28) in automated or partially automated transmissions (6) of commercial vehicles. A signal from the driver corresponding to a wish to engage the power take-off (28) is converted in a control device (34) into a signal for opening an automated clutch (4) between a prime mover (2) and the transmission (6) of the commercial vehicle. Once a predetermined minimum number of revolutions of the input shaft (10) of the transmission (6) is reached, a shifting device (26) is controlled for connecting the power take-off (28) with one transmission shaft (16, 42) that drives the power take-off (28) in order to obtain a closing of said shifting device (26, 52). The clutch (4) is again closed to prevent the teeth (50, 53) of the shifting device (26, 52) from remaining in front of each other. Sensors (32, 36, 40) determine whether the shifting device (26, 52) of the power take-off (28) has fully shifted, whether there is in the power take-off (28) a difference in the number of revolutions between the driving transmission shaft (16, 42) and the driven shaft (30, 72), or whether in the clutch (4) a defined adjustment travel has been exceeded.

Power train with auxiliary aggregates for use in a motor vehicle

Abstract: The prime mover of a power train for use in a motor vehicle normally drives a flywheel by way of a first engageable/disengageable clutch, and the flywheel drives the rotary input member of an automated change-speed transmission assembly by way of a second engageable/disengageable clutch. At least one first auxiliary aggregate (such as the pump of a power steering unit) can receive torque directly from the prime mover, and at least one second auxiliary aggregate (such as the compressor of an air conditioning system) can receive torque from the input member of the transmission assembly or from the prime mover. The rotary output member of the transmission assembly can receive torque from a continuously variable transmission which receives torque from the input member by way of a planetary, or from a planetary which receives torque from a continuously variable transmission. The internal gear of the planetary can be arrested by a stationary brake to thus interrupt the transmission of torque to the output member.

Portable air-blowing working machine

Abstract: A portable air-blowing working machine includes a prime mover and an air-blowing system. The air-blowing system incorporates first-stage and second-stage centrifugal air-blowing sections, which are rotatably driven by an output shaft of the prime mover and are interconnected by an air-blowing passage for delivering air discharged from the first-stage air-blowing section to the intake of the second-stage. In operation, external air is drawn into the first-stage air-blowing section, increased therein in velocity and pressure, and then continuously discharged via the air-blowing passage to the second-stage air-blowing section, where the air is further accelerated and compressed before being finally discharged to the atmosphere.

Variable speed field-oriented controlled induction generator

Abstract: In this work, a new induction generator system (IG), to work with variable speed and load, is proposed. The objective is to make it work as a stand alone (not grid connected) generator to produce constant voltage and variable frequency AC current. The IG is based on a three-phase induction machine (IM) exited, simultaneously, by a capacitor bank and a field-oriented controlled inverter. The inverter manipulates the IG excitation currents to control the generated voltage. The capacitor bank is used to minimize the inverter current and to filter voltage harmonics. A laboratory set up was mounted to experimentally validate the proposal. This prototype is based on a 4 kW conventional squirrel cage IM. The inverter uses IGBTs and the controller was implemented using a conventional PC and adequate interfaces. Experimental results are presented to validate the proposed strategy. This system can be used in variable-speed micro wind or hydro power plants where the prime mover operates within a variable speed range to obtain a better efficiency.

Rotational atherectomy device with exchangeable drive shaft cartridge

Abstract: The present invention is a rotational atherectomy device having a handle housing (10), and an exchangeable drive shaft cartridge (60). The handle housing includes a rotatable prime mover (34) carried by a prime mover carriage (30) which is longitudinally movable with respect to the handle housing. The drive shaft cartridge includes a cartridge housing (62), a longitudinally extendable tube (70), a catheter (22), and a rotatable drive shaft (20) which, near its distal end, has an abrasive tissue removal implement (26). The cartridge housing may be attached to, and detached from, the handle housing. The longitudinally extendable tube may be attached to, and detached from, the prime mover carriage. The drive shaft together with its tissue removal implement may be attached to, and detached from, the prime mover, thereby permitting the drive shaft cartridge to be selectively attached to, and detached from, the handle housing.

Control system for prime mover and hydraulic pump of hydraulic construction machine

Abstract: A reference pump-delivery-rate calculating portion calculates a reference delivery rate of a hydraulic pump by referring to a table stored in a memory based on a control pilot pressure for the hydraulic pump. A target pump-delivery-rate calculating portion divides the reference delivery rate by a ratio of a maximum revolution speed to a target engine revolution speed, thereby calculating a target delivery rate. A target pump tilting calculating portion divides the target delivery rate by an actual engine revolution speed and a constant, thereby calculating a target tilting. A solenoid output current calculating portion calculates a drive current to provide the target tilting and outputs the drive current to a solenoid control valve. The pump delivery rate is thereby controlled with good response following input change of an operation instructing device.

Control device for four wheel drive vehicle

Abstract: PROBLEM TO BE SOLVED: To provide a control device for a four wheel drive vehicle, which allows assist driving by means of a secondary prime mover in accordance with the gradient of a road surface to be performed just before the slipping of each wheel driven by a primary prime mover takes place. SOLUTION: The output torque of a secondary prime mover (MG) 28 is determined by a motor driving control means 70 based on the gradient of a road surface α, which is detected by a road surface gradient sensor 52, and the MG 28 is controlled to allow the output torque determined above to be outputted. Therefore, for example, when a vehicle is started to run over an uphill road, before the slipping of each front wheel 20 driven by an engine 10 takes place, driving force in accordance with the gradient of the road surface αis applied to a vehicle by the MG 28, to prevent each driving wheel from slipping at the early stage of starting, and to suppress the instant back-ward driving of the vehicle, so that an appropriate starting performance can thereby be provided.

Power output unit and control method therefor

Abstract: PROBLEM TO BE SOLVED: To efficiently transmit output power from a prime mover to a drive shaft by an arrangement wherein the rotary shaft of a second motor coupled with the drive shaft can be coupled with the output shaft of the prime mover and the drive shaft or can be uncoupled therefrom SOLUTION: The rotary shaft of a rotor 41 in a motor MG2 is coupled mechanically which a crankshaft 56 or uncoupled therefrom through a first clutch 45 which is disposed between a planetary gear 200 and a motor MG1 Furthermore, it is coupled mechanically with the ring gear shaft 227 of the planetary gear 200 through a second clutch 46 Consequently, the occurrence of power circulation can be avoided, and the overall efficiency of the apparatus can be enhanced

Continuously variable transmission

Abstract: PROBLEM TO BE SOLVED: To provide a continuously variable transmission capable of smoothly performing a shift change even during operation, increase shift change ratio larger than in the past, increase power transmission ability, improve power transmission efficiency and use a ball roller with good accuracy and productivity capable of using the two or more ball rollers. SOLUTION: In both sides of a casing 3, a prime mover shaft 1 provided with a prime mover wheel 1a in an inside end and a driven shaft 2 provided with a driven wheel 2a similarly in the inside are provided on the same axial line by opposing the prime mover wheel 1a to the driven wheel 2a. Between the prime mover wheel 1a and the driven wheel 2a, a rotating-around impeding frame 4, provided vertically respectively swivelably with a first swivel member 7, 7 meshed with a sector gear part 6, 6, is arranged. In an opposite side to a side provided with the sector gear part 6, 6 of the first swivel member 7, 7, a recessed groove is provided, in this recessed groove, two power transmitting ball rollers 9, 9 engaging a bearing-shaped outer ring 10 are provided. A second swivel member, swiveling the outer ring 10 by interposing its both sides of the ball roller 9 provided in the above, is provided.

Cooler of hybrid vehicle

Abstract: PROBLEM TO BE SOLVED: To cool uniformly the strong electricity system of a hybrid vehicle which comprises its power supply unit and its motors, etc., in response to its driving state. SOLUTION: In a cooler of a hybrid vehicle, as a cooler of its prime mover (motor and an engine), a radiator 45 and a motor driven fan 49 for feeding cooling air to the radiator 45 are provided additionally. Here, cooling water is made to circulate through the radiator 45 and through at least one of motors 1, 4 and a power supply unit 40 of the motors 1, 4. Furthermore, in a controller 16 of the motor-driven fan 49, there are provided means for sensing the outputs of the motors 1, 4 and the output of the power supply unit 40, means for sensing the driving states of the hybrid vehicle and its engine 2, a fan driving means for so driving the motor-driven fan 49 based on the foregoing sensed outputs such that the larger the outputs are, the larger the cooling air volume of the fan 49 is, and a correction means for predicting the load of the prime mover based on the foregoing sensed driving states and correcting the foregoing cooling air volume, based on the predicted result in a direction such that larger the predicted load is, the larger the cooling air volume is.

Machine with at least two modes of operation and switching means for changing the machine mode of operation

Abstract: A machine including a fluid compressor (12); a generator (14); a prime mover (16) operably connected to the compressor and the generator; a machine switching means (60) for switching the machine to a first mode of machine operation where only the compressor is operable, to a second mode of machine operation where only the generator is operable, to third mode of machine operation where neither the compressor nor the generator are operable, or to a fourth mode of machine operation where both the compressor and generator are operable.

Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump

Abstract: In the arm-crowding or track operation, a calculating portion (700d2 or 700d4) calculates a modification gain (KAC or KTR) depending on an operation pilot pressure and a calculating portion (700g) calculates a decrease modification (DND) based on the KAC or KTR, while a calculating portion (700m or 700p) calculates a modification gain (KACH or KTRH) depending on an operation pilot pressure and calculating portions (700q-700s) calculate an increase modification (DNH) based on the KACH or KTRH. A reference target engine revolution speed NR0 is modified using the DND and DNH. In other operations than the arm-crowding and track operations, NR0 is modified using only the decrease modification (DND) calculated from the modification gain just depending on the operation pilot pressure. In the operation where an engine revolution speed is desired to become higher as an actuator load increases, the engine revolution speed can be controlled in accordance with change of the actuator load as well. In other operations, the engine revolution speed can be controlled just depending on the direction and input amount in and by which corresponding operation instructing apparatus is operated.

Testing apparatus for prime mover

Abstract: PROBLEM TO BE SOLVED: To enhance the reliability of the test result of a testing apparatus for a prime mover. SOLUTION: In a virtual vehicle, an engine 10 is provided, a dynamometer 20 is provided, and a transmission shaft 50 which connects both 10, 20 is provided. An engine control part 100, a torque control part 200 and a model computing part 300 constitute a testing apparatus which controls the virtual vehicle. The engine control part 100 controls the generation torque of the engine 10 on the basis of a preset vehicle-speed-change pattern. The model computing part 300 sets a load torque, to be generated at the dynamometer 20, on the basis of the equivalent inertia of the vehicle, on the basis of the equivalent damping constant of its driving system and on the basis of a dynamic characteristic model which is introduced by using an equivalent spring constant as a model constant. The torque control part 200 corrects the set load torque on the basis of the transmission characteristic of a torque transmission system up to the engine 10 from the dynamometer 20, and it controls the dynamometer 20 on the basis of the corrected torque.

Electric switch gauge for screw compressors

Abstract: A control apparatus, for measuring pressure in relation to a rotary screw compressor with capacity control means and a prime mover, including a pressure sensor to monitor the prime mover manifold pressure, and a series of relays which when tripped by the pressure sensor will engage a pressure mechanism to engage the capacity control means on the compressor. The pressure mechanism may be a hydraulic or a pneumatic pressure mechanism and the apparatus may further include a second pressure sensor to monitor the inlet gas pressure to the compressor and a third pressure sensor to monitor discharge pressure of the gas compressor.

Engine lag-down prevention device for hydraulic construction machine

Abstract: PROBLEM TO BE SOLVED: To reduce the lag-down of an engine generated at the urgent operation time of a hydraulic actuator from a non-operation state without generating the deterioration of a fuel consumption and the increase in a black smoke, in a hydraulic construction machine adopting a big engine as a prime mover. SOLUTION: When an operation lever 4a is not operated and a pressure switch 11 is turned OFF, a hydraulic pump 2 is a minimum slant running and an engine 1 runs with a high idle number of rotation. When the operation lever 4a is operated and the pressure switch 11 is turned ON, the control of the hydraulic pump 2 is converted from the minimum slant running control to a torque reduction control and converted to a rated torque control after the elapsing of a prescribed time ΔtA. When the operation lever 4a is returned to a neutral and the pressure switch 11 is turned OFF again, the control of the hydraulic pump 2 is converted from the rated torque control to the minimum slant running control after the elapsing of a prescribed time ΔtB.

External blower motor and starting motor for a combustion turbine system

Abstract: A combustion turbine system of this invention includes a compressor, a combustor, a turbine section, an external blower, an electrical generator and a prime mover for powering the blower and the compressor. The compressor produces a compressed air that mixes with fuel in the combustor to produce a hot gas. This hot gas is sent through the turbine section of the combustion turbine system to drive a rotor. The electrical generator may be coupled to the rotor, so that rotation of the rotor causes operation of the electrical generator. The rotor may also be coupled to the compressor, so that the rotation of the rotor also drives the compressor. The blower of this invention is external to the generator and provides a cooling medium for the electrical generator. The prime mover is coupled to the external blower so that it can power the blower and provide the cooling medium for the electrical generator. In addition, the prime mover is selectively connectable to the rotor, so that it can turn the rotor. In a preferred embodiment of this invention, the prime mover is an electrical motor. The prime mover can turn the rotor when the combustion turbine is not producing sufficient hot gas to turn the rotor, for example when the combustion turbine is being started. After the combustion turbine has been started and provides a sufficient amount of hot gas to drive the compressor, the prime mover for the rotor is no longer needed and can be disconnected from the rotor and the turbine section can act as the prime mover for the rotor.

Variable ratio transmission

Abstract: A variable ratio transmission (10) includes a differential gear assembly (12) coupled to three separate shafts. One of the shafts (14) is coupled to a prime mover and operates as an input shaft to the differential gear assembly (12). Another of the shafts (18) is connected to a load and operates as an output shaft of the differential gear assembly (12). The third shaft (16) is coupled to a controlled load (34) that is controlled by the user to adjust the transmission ratio between the input shaft (14) and the output shaft (18) in a continuous manner.

Wave-powered prime mover

Abstract: A wave-powered prime mover comprises a pair of pontoons (2, 3) connected to a central inertial barge (1), each pontoon (2, 3) being pivotally movable by ocean swell or waves relative to the barge (1). A pump (10) connected between each pontoon (2, 3) and the barge (1) converts the motion of the pontoon (2, 3) into water pressure energy. An improved power take-off and damping mechanism is provided for transforming incoming power, oscillating at a low frequency, into a higher frequency oscillating form for use in a generator, turbine, reverse osmosis plant or the like. A hydraulic circuit (10, 32, 34, 35, 37, 39) is used to rectify the incoming power into a uni-directional form for delivery as a continuous flow of pressurised water for doing work such as that described above.

Multiple speed transmission for connecting an air conditioner compressor of a vehicle to the engine of the vehicle

Abstract: A multiple speed transmission for connecting an air conditioner compressor of an automobile to a prime mover of the automobile. The transmission includes driving apparatus, driven apparatus, and mounting apparatus. The driving apparatus operatively connects to the prime mover of the automobile. The driven apparatus is operatively connected to the driving apparatus for operatively connecting to the air conditioner compressor of the automobile. The mounting apparatus mounts the driving apparatus and the driven apparatus to the prime mover of the automobile. When the air conditioner thermostat engages the air conditioner clutch, a RPM control box of the driving apparatus interchangeably engages a first clutch of the driving apparatus and a second clutch of the driving apparatus, based on the RPM of the prime mover of the automobile, to assure that the required RPM of the shaft of the air conditioner compressor of the automobile is continuously maintained, regardless of the RPM of the prime mover of the automobile.

Clutch and continuously variable transmission

Abstract: The invention comprises a simple and efficient transmission for varying speed and engagement of power, comprising a planetary drive with input means driven by a prime mover's output, scheduled friction clutch means for gradually slowing and stopping rotation of an idler wheel member of the planetary drive so that as the force of the clutch is increased, power is automatically transferred from the idler wheel member to the output of the planetary drive, starting with a slow speed with high torque to a fast speed with lower torque by scheduled increments which enable rotation of the output shaft, under load resistance, without prime mover stall.

Hybrid vehicle and power output unit thereof

Abstract: PROBLEM TO BE SOLVED: To reduce the circulation of power by controlling first and second connecting units at driving, such that the rotary shaft of a second motor takes four connecting states, where the rotary shaft is connected with the output shaft side of a prime mover or the first driver shaft side or disconnected therefrom. SOLUTION: In a front wheel power system, first and second clutches 111, 112 are coupled respectively with the rotor 142 of a front wheel assist motor 140. The first and second clutches 111, 112 are connected or disconnected through a control unit 190. Depending on the connecting state of the first and second clutches 111, 112, the front wheel power system of a hybrid vehicle is able to selective take four connecting states. Consequently, the hybrid vehicle can run, while selecting a coupling state of no or low power circulation from among the four connecting states depending on the running state at the time of normal running.

Directional drilling apparatus

Abstract: A directional drilling apparatus is disclosed In particular, but not solely, directional drilling apparatus which can be used in confined spaces or utilised in locations close to obstacles such as fences, houses, buildings, etc Means for pushing forward or advancing a drill head are also disclosed The means for pushing forward or advancing a drill head being of a design which provides a large amount of forward thrust for the size of the actuating unit and the drilling apparatus The drilling apparatus is articulated from a source of power such as a prime mover and thus can be used in confined spaces

Vehicle propulsion control in response to braking

Abstract: A vehicle 10 has an engine management system (EMS) 22 for controlling an engine 12 and a braking system 28 for slowing the vehicle 10 down. When the brake pedal 30 is applied, the EMS 22 progressively ramps down the engine torque in a tuneable manner, regardless of any torque demand signal from the accelerator pedal demand potentiometer 26. The EMS 22 includes an inclinometer 38 and selectively reduces or abandons the restriction of torque output from the prime mover 12 in response to the inclinometer signal so as, for example, to assist in hill starts. Torque control may be reducing fuel or air supply, or change of ignition timing. Alternatively, for electric vehicles, power to the motor vehicles is reduced. Torque output restriction may itself be limited or abandoned in response to a time delay, gear change or halting of the vehicle.

Starting system for a prime mover

Abstract: A starting system for a prime mover coupled to a generator includes a step-up inverter which converts DC power at a first voltage into AC power at a second, higher voltage. Halfwave pulses in the AC power are selectively applied to the generator by a pulse-population inverter coupled to the step-up inverter such that the generator is operated as a motor to supply motive starting power to the prime mover.