Abstract: When executing gradual excitation control, an excitation-current control unit controls an excitation current based on a gradual-excitation control signal from a gradual-excitation control unit, and when the gradual excitation control has been cancelled, the excitation-current control unit controls the excitation current based on a voltage control signal from a control-voltage comparison unit; the gradual-excitation control unit is configured in such a way as to be able to change gradual-excitation control methods in accordance with gradual-excitation-control setting information transmitted from an ECU.

Abstract: There is provided a vehicle-power-generator control apparatus that can largely raise the gasoline mileage of an internal combustion engine. The vehicle-power-generator control apparatus includes a boost control unit having a function of making a magnetic-field current control unit perform boost-on control or boost-off control, based on a command provided by an ECU through communication and a function of making the magnetic-field current control unit perform boost-on control or boost-off control, based on at least one of a rotation speed of an internal combustion engine and a temperature of a vehicle power generator.

Abstract: The generator control device for vehicle is provided with a boost permission determination circuit capable of controlling the power generation rate, if there is communication between the engine control device and the generator control device for vehicle, the boost permission determination circuit performs the field current control so that the specified power generation rate is achieved by the communication, if there is no communication between the engine control device and the generator control device for vehicle, based on the rotation speed and temperature of the generator for vehicle, the boost permission determination circuit performs the field current control.

Abstract: There is provided a vehicle-power-generator control apparatus that can largely raise the gasoline mileage of an internal combustion engine. The vehicle-power-generator control apparatus includes a boost control unit having a function of making a magnetic-field current control unit perform boost-on control or boost-off control, based on a command provided by an ECU through communication and a function of making the magnetic-field current control unit perform boost-on control or boost-off control, based on at least one of a rotation speed of an internal combustion engine and a temperature of a vehicle power generator.

Abstract: The generator control device for vehicle is provided with a boost permission determination circuit capable of controlling the power generation rate, if there is communication between the engine control device and the generator control device for vehicle, the boost permission determination circuit performs the field current control so that the specified power generation rate is achieved by the communication, if there is no communication between the engine control device and the generator control device for vehicle, based on the rotation speed and temperature of the generator for vehicle, the boost permission determination circuit performs the field current control.

Abstract: A flyback-type switching power supply circuit provided with a transformer including a primary coil and a secondary coil, and a switching element connected to the primary coil, comprising: a multiplying circuit for multiplying a first value obtained by multiplying the on-duty ratio of a secondary current flowing to the secondary coil by a predetermined first constant, and a second value obtained by multiplying the peak value of a primary current flowing to the primary coil by a predetermined second constant; and a switching control circuit for controlling switching of the switching element so that the result of multiplication by the multiplying circuit and a third value obtained by multiplying a reference voltage by a predetermined third constant match; and the flyback-type switching power supply circuit is configured so that at least one of the first constant, the second constant, and the third constant is variable by an external signal.

Abstract: A flyback-type switching power supply circuit provided with a transformer including a primary coil and a secondary coil, and a switching element connected to the primary coil, comprising: a multiplying circuit for multiplying a first value obtained by multiplying the on-duty ratio of a secondary current flowing to the secondary coil by a predetermined first constant, and a second value obtained by multiplying the peak value of a primary current flowing to the primary coil by a predetermined second constant; and a switching control circuit for controlling switching of the switching element so that the result of multiplication by the multiplying circuit and a third value obtained by multiplying a reference voltage by a predetermined third constant match; and the flyback-type switching power supply circuit is configured so that at least one of the first constant, the second constant, and the third constant is variable by an external signal.

Abstract: A trigger-type signal Ve having the same period as that of a reference pulse signal Vp outputted from a reference pulse generation circuit is inputted to a set terminal of a logic circuit and a signal Vg having a polarity opposite to that of the signal Ve is inputted to a sample hold circuit. When a rise of the signal Ve is detected, a switching element S1 becomes on-state and a switching element S2 becomes off-state at the same time. Thus, a voltage based on a current flowing in the switching element S1 is not applied to an addition circuit but a voltage charged in a capacitor just before is applied thereto. After a time based on a pulse width of the signal Ve has passed, when the signal Vg rises and the switching element S2 becomes on-state, the voltage based on the current is applied to the addition circuit.

Abstract: A spring seat is disclosed which is employed on a spring that serves to absorb and attenuate torsional vibrations. The spring seat includes a seat body that serves to support an end portion of the spring, and a sliding portion that is fixed to an outer side of the seat body and composed of a material that is different from that of the seat body.

Abstract: A damper disc assembly having multiple embodiments. In one embodiment, spring seats are arranged at opposite ends of coil springs disposed between a power input rotary member and a power output rotary member. Each spring seat has a contacting surface with mutually perpendicular slanting portions. In another embodiment, a modified spring seat determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element. The body portion of the friction element is made of resin and includes a friction generating surface that contacts a side surface of the sub-plate. The fiction adjusting element is provided in the friction generating surface of the body portion by molding and modifies the friction coefficient thereof. In a fourth embodiment, the friction element has a coating applied to a friction surface which modifies the friction coefficient.

Abstract: A pair of spring seats (32) are used at opposite ends of a small coil spring (6) disposed between a power input rotary member and a power output rotary member. Each spring seat (32) includes a receiving side surface for receiving the spring and a contacting surface (36). Each contacting surface (36) is formed with four slanting surfaces that slant inward toward a central portion of the contacting surface. The intersections of the four slanting surfaces of each spring seat define two intersecting V-shaped grooves (37, 38). The power input rotary member and the power output rotary member contact respective portions of one of the V-shaped grooves (37, 38) of each spring seat. Engagement between the rotary members and the engaged V-shaped grooves restricts movement of the spring seats (32).

Abstract: A twin-clutch device is provided that overcomes problems relating to a releasing property, a start property and a phase shift between clutch disks. The device includes first and second clutch disk assemblies 5 and 6, an intermediate plate 7, a clutch cover assembly 9, strap plates 16 and control mechanism. The intermediate plate 7 is disposed between the two clutch disk assemblies. The clutch cover assembly 9 has a pressure plate 17 and a diaphragm spring 18. The strap plates 16 bias the pressure plate 17 away from the flywheel 2. The control unit operates in a clutch switching operation to move the intermediate plate 7 at a slower speed than the pressure plate 17 upon start of movement of the pressure plate 17, and then to move both the intermediate plate 7 and the pressure plate 17 in synchronization with each other after the pressure plate 17 moves a distance corresponding to a predetermined stroke.

Abstract: Providing a power control device of a simple structure which increases the reliability of a circuit as incorporated therein. A semiconductor component constituting a power control device comprises a semiconductor chip, atop of which a cathode and a gate are formed via an oxide film portion. The cathode comprises a pad portion, a fusion portion and a contact portion. The pad portion and the contact portion are interconnected by the fusion portion only. An anode is formed at the bottom of the semiconductor chip. With the flow of a fusing current through the fusion portion, the fusion portion is fused by heat generated therefrom whereby the current flow through the cathode and the anode is interrupted.

Abstract: A clutch disk assembly includes two pieces of friction facings, cushioning plates 12, clutch plate 3, retaining plate 4, a plurality of connecting pins 11, hub and rivets 17. The cushioning plates 12 are disposed side by side in a circular direction between two pieces of friction facings. Each of the cushioning plates 12 includes a cushioning part 16 disposed between two pieces of friction facings, and an installation part 15 in which two holes 15a are formed apart each other in a circular direction. The connecting pins 11 fixedly couple the outer circumferential portions of plates 3 and 4 to each other. The rivets 17 are inserted in the holes 15a to fix the cushioning plates 12 to the outer circumferential edge of the clutch plate 3. The locations of the connecting pins 11 in a circular direction are located between two adjacent holes 15a of the cushioning plates 12 in a circular direction. The locations of the connecting pins 11 reduce the stresses in the installation parts 15 of the cushioning plates 12.

Abstract: In one embodiment, a pair of spring seats (32) are intended for use at opposite ends of a small coil spring (6) disposed between a power input rotary member and a power output rotary member. Each spring seat (32) includes a receiving side surface for receiving a respective end of the small coil spring and a contacting surface (36). The contacting surface (36) is formed with slanting portions (37, 38) with V-shaped cross section, mutually perpendicular to one another. The power input rotary member and the power output rotary member contact a respective slanting section of one of the slanting portions (37, 38). In another embodiment, a spring seat (40) is provided with a first support portion (43) and a second support portion (44) such that the orientation of the spring seat (40) determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element (20).

Abstract: In one embodiment, a pair of spring seats (32) are used at opposite ends of a small coil spring (6) disposed between a power input rotary member and a power output rotary member. Each spring seat (32) includes a receiving side surface for receiving the small coil spring and a contacting surface (36). The contacting surface (36) is formed with slanting portions with V-shaped cross sections (37, 38) mutually perpendicular. The power input rotary member and the power output rotary member each contact a respective slanting section of one of the slanting portions. In another embodiment, a spring seat (40) is provided with a first support portion (43) and a second support portion (44) such that the orientation of the spring seat (40) determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element (20).

Abstract: A clutch disc assembly is provided with a support structure and friction generating members that provide generally constant friction generation, even when misalignment occurs between adjacent members. The clutch disc assembly 1 includes a hub 2, a fourth friction washer 19, a clutch plate 3 and a second coil spring 7. The fourth friction washer 19 is fixed to the hub 2 and has a tapered surface 19a. The clutch plate 3 has an inner peripheral edge tapered portion 3c which is abutted against the tapered surface 19a and disposed on the outer periphery of the hub 2. The second coil spring 7 couples the hub 2 to the clutch plate 3 in a circumferential direction.

Abstract: A torsion damper for a clutch disc is disposed in window holes provided in power input and output rotating elements of the clutch disc, for elastically coupling the power input and output rotating elements in a direction of their rotation. The torsion damper includes a pair of seat elements 11 and a rubber element 12 therebetween. In one embodiment, the rubber element 12 is positioned between both the seat elements 11 and is capable of expanding and contracting. The rubber element includes a projection 20 and a through-hole 16 is provided in each of the seat elements 11.

Abstract: A clutch cover assembly (1) has release load characteristics which have been smoothed out or flattened by using a secondary conical spring (8) in combination with a diaphragm spring (7). To reduce the overall number of parts in the assembly 1, the pressure plate (6) includes axially extending pins (10) which extend through holes formed in the diaphragm spring (7). The pins (10) are also engaged with a portion of the conical spring (8).

Abstract: A first frictional resistance generating mechanism 10 includes a first friction washer 51, a second friction washer 52 and a conical spring 53. The first friction washer 51 includes a high friction coefficient member 71 in contact with a side surface of a flange 4b and a core plate 72 fixed thereto, and has second apertures 51a through which stop pins 41 fixed to the first and second side plates 5 and 6 extend. The second friction washer 52 has a low friction coefficient member 73 in contact with the core plate 72, and is relatively nonrotatably coupled to the stop pins 41. The conical spring 53 biases the first and second friction washers 51 and 52 toward the flange 4b.