Patent application number | Description | Published |
20080266375 | OPTICAL SCANNING APPARATUS, METHOD OF CONTROLLING AMOUNT OF LIGHT, AND IMAGE FORMING APPARATUS - An optical scanning apparatus includes an approximation formula determination unit, a sensitivity correction value determination unit and a bias current controller. The approximation formula determination unit determines an nth-order approximation formula and an mth-order approximation formula, which represent the sensitivity characteristic of the image carrier along the main-scanning direction thereof, from sensitivity data representing the sensitivity of each area obtained by dividing the surface of the image carrier into a plurality of areas. The sensitivity correction value determination unit determines a sensitivity correction value, which is a correction value of sensitivity in each area, from the nth-order approximation formula and mth-order approximation formula. The bias current controller controls a bias current in accordance with the sensitivity correction value. A switching current controller controls a switching current in accordance with the sensitivity correction value and a current value that is for obtaining a target amount of light. | 10-30-2008 |
20090010571 | OPTICAL SCANNING APPARATUS, LIGHT POWER CONTROL METHOD, AND IMAGE FORMING APPARATUS - An optical scanning apparatus includes a light source, rotational polygonal mirror, correction data calculating unit, modification computing unit, and adjustment unit. The adjustment unit adjusts drive current supplied to the light source using the correction data calculated by the correction data calculating unit when a first of a plurality of modes is selected or using the correction data calculated by the modification computing unit when a second of the plurality of modes is selected. | 01-08-2009 |
20120120177 | ELECTROPHOTOGRAPHIC-TYPE IMAGE FORMING APPARATUS - An image forming apparatus comprises a light source, a photosensitive member and a control unit. The light source turns on in response to a driving current supplied based on image data. An electrostatic latent image is formed on the photosensitive member by exposing the photosensitive member to a light beam output from the light source turned on. The control unit controls the value of the driving current supplied to the light source in accordance with a driving state of the light source so that the value of the driving current supplied to the light source differs and changes with the passage of time in accordance with the driving state of the light source prior to the driving current being supplied to the light source. | 05-17-2012 |
20120243023 | OPTICAL SCANNING DEVICE, LIGHT CONTROL METHOD THEREFOR, AND IMAGE FORMING APPARATUS - An optical scanning device controls outputs of laser beams with high accuracy by correcting the nonlinearity of a current-light characteristic. An electric current supply unit supplies a bias current or a driving current to a semiconductor laser. A detection unit detects light amount of the laser beam. A control unit controls the driving current based on the light amount detected. A constant current generation unit generates constant currents. A calculation unit derives an n-th degree approximate expression (n≧2) of a current-light characteristic based on the light amount by emitting a specific light emitting section according to the constant currents, and calculates a light emission start current start current for the specific light emitting section using the expression. A bias current generation unit generates the bias current based on electric current values obtained from results of light controls for other light emitting sections and the expression. | 09-27-2012 |
20120268723 | EXPOSURE APPARATUS AND IMAGE FORMING APPARATUS - An exposure apparatus according to this invention uses both a first light source which outputs a light beam corresponding to a drive current corresponding to image information, and a second light source to irradiate the surface of a photosensitive drum with a plurality of light beams. The second laser light source irradiates the photosensitive drum with a laser beam in accordance with a drive current corresponding to a correction value according to which unevenness of potential characteristics due to unevenness of sensitivity of the surface of the photosensitive drum is reduced. The same region on the surface of the photosensitive drum is irradiated with laser beams which are output from the first and second laser light sources onto the photosensitive drum in superposition. | 10-25-2012 |
Patent application number | Description | Published |
20110239818 | HYBRID DRIVE DEVICE - The present invention relates to a hybrid drive device including a first shaft coupled to an internal combustion engine, a rotary electric machine, a second shaft disposed coaxially with the first shaft and coupled to the rotary electric machine and a speed change mechanism, a clutch is provided to switch on and off transfer of a drive force between the first shaft and the second shaft, and a case houses the first shaft, the second shaft, the rotary electric machine, and the clutch. A rotor of the rotary electric machine is fixed to an outer peripheral portion of the clutch housing. A first seal mechanism is disposed in contact with an outer peripheral surface of the large diameter portion of the second axially projecting portion and the inner peripheral surface of the first axially projecting portion, and side by side with the first support mechanism in the axial direction. | 10-06-2011 |
20120032538 | ROTATIONAL ELECTRICAL MACHINE AND VEHICLE DRIVE DEVICE - A rotating electrical machine configured with a rotor and stator. The rotor is rotatably supported radially inside of a stator that has coil end portions on both sides in an axial direction, and which is structured so that oil is supplied from an axial first direction side to the coil end portions on the both sides in the axial direction. A communication oil passage provided in at least one of the rotor and the rotor support member, is configured to communicate with a first opening and a second opening from an oil collecting portion. The first opening opens radially inside the coil end portion on the axial first direction side, and the second opening opens radially inside the coil end portion on an axial second direction side, which is the other side in the axial direction of the rotor. | 02-09-2012 |
20120032544 | VEHICLE DRIVE DEVICE - In a rotating electrical machine configured with a rotor and stator, a lubricant supply portion is configured to supply a lubricant from within. A communication passage is provided in either the rotor support member or the sensor rotor, and is configured so as to provide a passage from a first space, which extends radially outward from the axial first direction side of the sensor rotor and is formed between the support wall and the rotor support member, with a second space, which is formed between the sensor rotor and the rotor support member. The case of the machine has a support wall extending at least in a radial direction to an axial first direction side, which is one side in an axial direction of the rotating electrical machine, and after lubricating the bearing, the lubricant is discharged from the second space to the first space through the communication passage. | 02-09-2012 |
20120080248 | Vehicle drive device - A vehicle drive device configured with an input member drivably coupled to an internal combustion engine. The drive device is also configured with an output member drivably coupled to wheels, a friction engagement device that selectively drivably couples the input member and the output member to each other, and a rotary electric machine provided on a power transfer path connecting between the input member and the output member. On the vehicle drive device, a housing oil chamber houses at least friction members of the friction engagement device and is filled with oil, a housing space houses the rotary electric machine, and there exists a first oil passage through which oil is supplied to the housing oil chamber. There is also a second oil passage through which oil is discharged from the housing oil chamber and a third oil passage through which oil is supplied to the housing space. | 04-05-2012 |
20120080286 | Vehicle Drive Device - A vehicle drive device configured with an input member drivably coupled to an internal combustion engine, an output member drivably coupled to wheels, and a friction engagement device that selectively drivably couples the input member and the output member to each other. A rotary electric machine is connected between the input member and the output member. A housing oil chamber houses at least friction members of the friction engagement device and is filled with oil. A housing space houses the rotary electric machine, a first oil passage through which oil is supplied to the housing oil chamber, a second oil passage through which oil is discharged from the housing oil chamber; and a third oil passage through which oil discharged from the second oil passage is supplied to the housing space. | 04-05-2012 |
20120088621 | Transmission apparatus and shift control apparatus - A speed change device configured with an input member and an output member. The speed change device includes a speed change mechanism in which a plurality of shift speeds are established in accordance with respective engagement states of a plurality of friction engagement elements to transfer rotation of the input member to the output member. A slip travel mode is provided in which the vehicle is run while transferring torque from the input member to the output member with one of the friction engagement elements for establishment of each of the shift speeds caused to slip. A slip engagement element is the friction engagement element to be engaged commonly for establishment of at least a forward start shift speed and a reverse start shift speed. | 04-12-2012 |
20120090425 | HYBRID DRIVE SPEED CHANGE DEVICE - To provide a hybrid drive speed change device in which a rotation sensor can be disposed appropriately from the viewpoint of reducing the axial dimension of the device. A rotary electric machine MG is disposed coaxially with an input shaft M, and includes a stator St and a rotor Ro provided radially inwardly of the stator St. An oil pump | 04-19-2012 |
20120211322 | FRICTION-PLATE LUBRICATING DEVICE FOR AUTOMATIC TRANSMISSION - A friction-plate lubricating device for an automatic transmission that includes a friction engagement element with a plurality of friction plates in which outer friction plates and inner friction plates are alternately disposed; a hub with splines engaged with teeth formed on an inner circumference of the inner friction plates, the hub having the splines on an outer circumference thereof and having uneven portions formed on an inner circumference thereof; and a nozzle that discharges lubricant to the uneven portions. Recesses of the uneven portions serve as oil reservoirs in which the lubricant gathers, and through-holes are formed in bottom surfaces of the recesses. The lubricant discharged from the nozzle is collected in the oil reservoirs formed by the recesses so as to be supplied to the plurality of friction plates of the friction engagement element through the through-holes. | 08-23-2012 |
20120217122 | VEHICLE DRIVE DEVICE - A vehicle drive device comprising a friction engagement device disposed on a power transfer path between an engine and wheels and including a first friction plate drivably coupled to a power transfer path on the engine side and a second friction plate drivably coupled to a power transfer path on the wheels side, a rotary electric machine drivably coupled to the power transfer path on the wheels side, a case member including an internal space where the first and second friction plates of the friction engagement device are housed, the internal space being configured to dip the first and second friction plates in oil and a communication mechanism that regulates communication between the internal space of the case member and an external space, the communication mechanism allowing the oil to be discharged from the internal space to the external space when communication between the internal and external spaces is allowed. | 08-30-2012 |
20120242198 | VEHICLE DRIVE DEVICE - A vehicle drive device including a rotating electrical machine having a rotor and a stator, as a driving source force of wheels; a rotation sensor that detects a rotational position of the rotor with respect to the stator; a rotor support member that supports the rotor at a position radially inside the stator; an oil pump having a pump rotor disposed on a same axis as the rotating electrical machine and drivingly coupled to the rotor support member, and a pump case accommodating the pump rotor; and a support bearing that is placed between the pump case and the rotor support member in a radial direction, and that rotatably supports the rotor support member with respect to the pump case. The rotation sensor and the support bearing are positioned so as to overlap each other as viewed in the radial direction. | 09-27-2012 |
20120247106 | HYBRID DRIVE DEVICE - A hybrid drive device including an electric motor; an automatic transmission; a lubricating oil passage to which a lubricating oil pressure is supplied; and a switching valve that is switched between a first state where the lubricating oil passage communicates with a first lubricating oil passage that guides lubricating oil to the automatic transmission, and a second state where the lubricating oil passage communicates with a second lubricating oil passage that guides the lubricating oil to the electric motor. The electric motor and an internal combustion engine output shaft are operable in conjunction with the automatic transmission. The switching valve is switched from the first state to the second state when a vehicle is in a stationary state or running at a speed of a predetermined value or less including the stationary state of the vehicle. | 10-04-2012 |
20120247911 | HYBRID DRIVE DEVICE - A hybrid drive device including an electric motor; an automatic transmission; a first oil passage; and a second oil passage branched from the first oil passage and that guides the oil to a friction element that is engaged for establishment of a speed in the automatic transmission. An orifice is provided in the first oil passage downstream of the second oil passage. A switching valve for the friction element is provided in the second oil passage to be switched between communicated and blocked states. A hydraulic servo for the friction element is supplied with a hydraulic pressure to control the friction element between engaged, disengaged, and slip states. The switching valve includes a control oil chamber that communicates with the hydraulic servo, and is switched into the blocked state when the friction element is disengaged and into the communicated state when the friction element is engaged or the slip state. | 10-04-2012 |
20130008759 | Hybrid drive device - There is provided a first and second bearing supporting a clutch case at first and second axial sides in a radial direction, a rotor of a rotary electrical machine is supported by the clutch case, a gap between an outer peripheral face of a pump drive shaft 10 and an inner peripheral face of a drive shaft insertion hole | 01-10-2013 |
20130284557 | VEHICLE DRIVING FORCE TRANSMISSION DEVICE - Leakage oil from a hydraulic actuator operating a dry clutch is prevented from leaking into a dry space where the dry clutch is placed. A space formed by the back surface of a piston of a hydraulic actuator, a coupling plate, and a cylinder portion is sealed by a first seal portion and a second seal portion. Oil leaked from a hydraulic oil chamber through the piston is stored in the space, and is returned to a wet space in a case through an oil passage. | 10-31-2013 |
20140246935 | HYBRID DRIVE APPARATUS - A hybrid drive apparatus, which includes a speed change mechanism disposed on a first axis coaxial with an engine output shaft and a rotary electric machine disposed on a second axis parallel to the first axis, including: a case main body which accommodates the speed change mechanism and the rotary electric machine and has an opening portion opening on one side of the speed change mechanism in an axial direction; and a cover member which closes the opening portion of the case main body, wherein the rotary electric machine is disposed such that a portion thereof overlaps the cover member when viewed in the axial direction. | 09-04-2014 |
20140288754 | CONTROL DEVICE FOR VEHICLE DRIVE DEVICE - A control device that controls a vehicle drive device in which a rotary electric machine is provided in a power transfer path that connects between an internal combustion engine and wheels. Engagement of a second engagement device is started when a change in shift range from a stop range to a running range is detected when output torque of the rotary electric machine is zero with the internal combustion engine rotating and with both the first engagement device and the second engagement device disengaged. Engagement of a first engagement device is started after engagement of the second engagement device is started, and the output torque of the rotary electric machine is increased from zero at the same time as engagement of the first engagement device is started or before engagement of the first engagement device is started. | 09-25-2014 |
20140326105 | HYBRID DRIVE DEVICE - A hybrid drive device having a clutch that engages and disengages an output member of an internal combustion engine and an input shaft of an automatic transmission device with and from each other. A rotary electric machine has a stator fixed to a case and a rotor coupled to the input shaft of the automatic transmission device. The rotary electric machine is disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radial direction. Lubricating oil is supplied from the input shaft of the automatic transmission device to the clutch and the hybrid drive device includes a shield portion that allows the lubricating oil to bypass the rotary electric machine and leads the lubricating oil supplied to the clutch to an oil reservoir. | 11-06-2014 |
20140331945 | HYBRID DRIVE DEVICE - A hybrid drive having a clutch and a rotary electric machine disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radially outer side, the rotary electric machine having a stator fixed to a case and a rotor coupled to the input member of the automatic transmission device. A clutch lubricating oil hole formed in a center shaft that extends at a center portion of the clutch and the rotary electric machine. A rotary electric machine lubricating oil hole formed in the center shaft. Separation means for separating lubricating oil such that lubricating oil from the clutch lubricating oil hole is led to the clutch and lubricating oil from the rotary electric machine lubricating oil hole is led to the rotary electric machine. | 11-13-2014 |