摘要:
The invention provides a method for controlling a clutch fitted with motorized actuation by means of a pulse-fed direct-current electric motor. According to the invention, the control system of the electric motor comprises a microcomputer associated with a memory, in which values defining the duration of the control pulses of the clutch are stored, and these values can be updated during the operating life to take into account ageing and wear. The invention is particularly suitable for automatic clutch control in an automobile.
摘要:
A power-assisted steering device for a vehicle which has a steering column consisting of two coaxial shafts, an input and an output shaft, which are coupled so that they have a limited relative angular play between them and which are rotationally fast with rotors of a hydraulic distributor. In case of accidental breakage of the torsion bar which couples the two shafts elastically, an axially acting stop means is provided between the input shaft and the housing of the distributor so as to prevent the input shaft from separating from the output shaft. This stop means consists of a washer which has a prolongation projecting towards the input shaft. The washer additionally maintains the sealing gasket which is between the input shaft and the distributor housing in position on the housing.
摘要:
A friction clutch device for coupling a first rear motor shaft to a second front forced shaft by allowing free relative axial displacement between the two shafts. The clutch device includes a double shock-absorbing steering wheel having a primary couple input assembly which is fixedly mounted axially to the motor shaft, a secondary couple output assembly which is rotatably connected to a reactive plate of the clutch device which is supported by the forced shaft. An elastic circumferential action member is arranged in a cavity that is peripheral to the primary assembly to rotatably connect the secondary assembly, with circumferential shock absorption, to the primary assembly. The secondary assembly is fixedly mounted axially relative to the reactive plate.
摘要:
An actuator comprising, in a casing, a mechanism which is controlled by a motor and which is adapted to control an output member. The mechanism including in particular a moveable thrust unit which is arranged generally for to and fro movement. The casing is liquid-tight, and incorporates a sump for containing a liquid lubricant. A pump is associated with this sump, the pump being arranged to be actuated by the moveable thrust unit. The suction port is in communication with the lower part or sump of the casing, while its delivery port is in communication with the mechanism in at least one region of the latter that is to be lubricated.
摘要:
A power-assisted steering device for a vehicle comprises a two-part steering column which parts are capable of limited relative angular displacement, and a hydraulic power-assistance mechanism responsive by means of a hydraulic distributor to relative angular displacement of the parts. The distributor comprises a stator having a pressure orifice connected to a hydraulic pump, a return orifice connected to a fluid reservoir, and two service orifices connected to the assisting jack. Two adjacent rotors are located within the stator and these are rotatable respectively with said two parts, the first rotor having distribution passages interacting with the stator pressure and return orifices, and the second rotor having distribution passages interacting with the first rotor distribution passages and the stator service orifices. According to the invention, the stator pressure and return orifices communicate respectively with two chambers, one of which is peripheral and communicates directy with the first rotor distribution passages comprising apertures located in the outer periphery of the rotor, and the other of which is central and communicates directly with first rotor distribution passages comprising passages located adjacent the inner periphery of the rotor, the first rotor being located within the axial dimension of both of said chambers.
摘要:
A database of entries, such as Web pages and sites, is provided. The entries are at least partially mapped to a set of predetermined categories. The entries are also associated with keywords, for instance, by automatic indexing of documents. In response to a query into the database, a user is provided with a series of refinement strategies, in addition to search results. Refinement strategies comprise categories relevant for the search, selected among the set of predetermined categories. Refinement strategies also include keywords dynamically selected among keywords associated with the entries. The user may easily navigate among the results to the query, and formulate new queries.
摘要:
Motorized control device, suitable for a motor vehicle clutch, comprises a motor which activates a shaft and a lever by means of a connection mechanism associated with a force moderator arrangement incorporating a spring; according to the invention, this spring is mounted under compression.
摘要:
A power-assisted steering device for a vehicle comprises a two-part steering column, which parts are capable of limited relative angular displacement, and a hydraulic power-assistance mechanism having a distributor responsive to relative angular displacement of the parts and comprising two rotors, each rotationally integral with a corresponding part of the steering column. One or both of the steering column parts has a prism-shaped cavity in its end, a prism-shaped plug being received in the cavity with an angular offset and being connected to the other part, thus providing the limited angular play between the two parts. The plug may either be a separate element received in cavities in both parts of the steering column, or may be received in a cavity of only one part and integrally formed with the other part. A thin corrugated tooth annular element may act as a rotational lock between each part and the corresponding rotor of the distributor. Alternatively, the rotor is received directly on a prismatic outer surface of the corresponding part, or on the plug, when the plug is rotationally fast with the part.
摘要:
A double flywheel vibration damper including two coaxial masses free to rotate relative to each other and acting against elastic parts, in which one of the masses, referred to as the first mass, is intended to be fastened to a drive shaft, whereas the other mass, referred to as the second mass, includes a reaction plate assuring rotational connection to a driven shaft, and in which the first mass has a central hub projecting axially and carrying bearing member operating between the second mass and the central hub to enable the second mass to rotate on the first mass, wherein the central hub comprises two aligned coaxial parts, namely a first hub supporting the second mass rotationally via the bearing member fitted on this first hub, and a second hub intended to be fastened to the drive shaft, and wherein the second hub constitutes an axial spacer between the drive shaft and the first hub. The invention is applicable to motor vehicle transmission systems.
摘要:
A double flywheel, the friction members of which comprise a first ring (41) and a second ring (46) which are situated radially one outside the other, the first ring being gripped elastically in frictional contact against a friction face (40) of one of the rotating masses by a closure ring (45), a resiliently acting ring (48) being interposed between this closure ring (45) and the friction ring (46), so as to constitute two-stage friction members having a reduced number of components.