摘要:
A friction clutch such as an electromagnetic clutch, in which a driving friction surface is formed on a rotor integral with a rotationally driven pulley and a driven friction surface in opposed relation to the driving friction surface is formed on an intermediate member pivotally mounted on a boss by a pin, is disclosed. When the rotor is in rotation, the armature portion of the intermediate member is attracted by an initial energizing means for generating a comparatively small force such as an electromagnetic coil so that the intermediate member is rotated around the pin. When the friction surface of the intermediate member is lightly pressed against the friction surface of the rotor, the friction force exerted tangentially to the contact surface causes the intermediate member to rotate further around the pin and generate a large force along the normal. Thus, the friction force is increased thereby making it possible to transmit a large power from the rotor to the boss through the intermediate member.
摘要:
A torque transmission apparatus absorbs torque fluctuations (vibrations) while limiting the size of the outside dimensions of a pulley. Elastomeric dampers and pendulum type vibration-absorbing mechanisms are located between an outer tube and an inner tube of a pulley body.
摘要:
An inclined surface is formed in an upper inside wall of housing. The inclined surface inclines downwardly toward a lip seal. Lubricant oil supplied to the upper end of the inclined surface flows along the inclined surface without dropping downwardly due to surface tension, and flows to the lower end of the inclined surface then reaches the lip seal. Thus, the lubricant oil is supplied to the lip seal with certainty, thereby suppressing the wear of the lip seal and improving the durability of the compressor.
摘要:
In a rotary electric machine, a stator coil includes in-slot portions each contained in a corresponding one of slots of a stator core. The stator coil includes turn portions each connecting one end of a corresponding one of the in-slot portions projecting from one axial end of the stator core with one end of a corresponding alternative one of the in-slot portions projecting the one axial end of the stator core. The turn portions provide an end portion of the stator coil. A coolant guide is placed to cover a circumferential outer part of the end portion of the stator coil from radially outside thereof and provided with holes therethrough. The coolant guide guides a coolant therealong in a circumferential direction of the end portion of the stator coil while guiding, through the holes, a part of the coolant to the end portion of the stator coil.
摘要:
An automatic transmission system with a lock-up clutch for use with an engine includes an automatic transmission having an input shaft and an output shaft. A torque converter with a lock-up clutch is provided between the input shaft of the automatic transmission and an output shaft of the engine. A first device calculates a measure of time-domain variation in the rotational speed of the output shaft of the engine. A second device detects whether or not the measure of time-domain variation in the rotational speed of the output shaft of the engine exceeds a predetermined threshold value. A third device changes the condition of the lock up when the second device detects that the measure of time-domain variation exceeds the threshold value. A similar system is operable when the second device calculates a measure of time-domain variation in the rotational speed of the output shaft or the input shaft of the automatic transmission. A similar system is also operable when such measurements from the engine and the automatic transmission are combined.
摘要:
An electric rotating machine includes a rotor, a stator in which a coil is so wound as to have an coil end, and a coolant supply pipe. The coolant supply pipe lies with a length thereof extending substantially parallel to an axis of rotation of the rotor and is disposed above the stator in a direction of gravitational force. The coolant supply pipe has a first and a second coolant outlet through which coolant is to be emitted to the coil end. The first and the second coolant outlets are so oriented as to direct streams of the coolant to a first area and a second area of the coil end which are different in location from each other. This enables the coolant to be emitted to almost the whole of the coil end even when the electric rotating machine is titled in a direction in which the rotor turns.
摘要:
In a rotary pump in which axial end surfaces of outer and inner rotors is in pressurized direct contact with an axial end surface of a second side plate to form a mechanical sealing, both of the axial end surfaces of the outer and inner rotors and the axial end surface of the second side plate are provided with radial line grinding stripes. Teeth gap portions formed by the outer and inner rotors in mesh communicate with an outer circumference gap between the circumference of the outer rotor and inner circumference of a center plate and also with a shaft hole of the inner rotor through extremely slight gaps formed by concave and convex of the radial line grinding stripes so that contact surface between the outer and inner rotors and the second side plate is well lubricated to reduce torque loss.
摘要:
A hydraulic control system for an automatic transmission of an automotive vehicle is provided which has a fail-safe function of preventing unsafe operation of the automatic transmission if a failure occurs in any of solenoid valves which control engagement operations of frictional elements such as clutches and brakes of the transmission. The hydraulic control system includes a hydraulic pressure flow control unit which controls hydraulic pressure flow between at least one of the frictional elements and at least one of the solenoid valves to allow the hydraulic pressure to be supplied to a predetermined combination of the frictional elements to achieve the power transmission at one of given gear ratios. The hydraulic pressure flow control unit restricts the hydraulic pressure flow to an inoperative combination of the frictional elements which provides no power transmission. With these arrangements, the power transmission is established if any of the solenoid valves malfunctions to allow the vehicle to travel.
摘要:
A rotary flow control valve is provided, that, despite compact design, offers excellent vibration resistance, a high response speed, and superb proportionality of a controlled flow rate to an applied current value. In a channel selector 4 in a rotary flow control valve 1, a guide valve 2 mounted in a hollow of an inner housing 6 is borne by bearings 19 and 20 so that the guide valve 2 can rotate forward or in reverse. Intra-outer housing tubes 10, 11, and 12 are formed in an outer housing 5. In the inner housing 6, communicating channels 13 to 16 are formed in fours at symmetric positions with respect to the rotation center of the guide valve 2. In a torque motor 3, permanent magnets 33 are attached to a lower armature 32 coupled with the guide valve 2 using an adhesive. The magnetic poles at both ends of the permanent magnets 33 are opposed to cylinders 43 about which coils 34 are wound. With attraction and repulsion produced between the cylinders 43 and permanent magnets 33, the guide valve 2 rotates together with the lower armature 32.
摘要:
A rotor includes a rotor core and permanent magnets each of which is received in a corresponding slot of the rotor core with its magnetization direction being oblique to a radial direction of the rotor core. Each of the permanent magnets has a first corner portion positioned radially outermost and a second corner portion positioned radially innermost. For each of the permanent magnets, there are formed first and second gaps respectively between the first corner portion and the inner surface of the corresponding slot and between the second corner portion and the inner surface of the corresponding slot in a reference direction of the permanent magnet. The rotor core also has, for each of the permanent magnets, supporting portions each of which abuts and thereby supports, in the reference direction, a predetermined portion of the permanent magnet which is positioned away from both the first and second corner portions.