650results about "Fluid actuated clutches" patented technology

To provide an information processing device that can extract extraction data that captures features of original data as a whole and calculate an index value in a short period of time.SOLUTION: A processing device of an information processing device executes search processing that includes: a first step (S120) of calculating a relative frequency distribution of original data; a second step (S125) of setting a plurality of time windows for cutting out data of the original data for a partial period; a third step (S130) of cutting out data from the original data; a fourth step (S140) of calculating a relative frequency distribution in the extracted data; and a fifth step (S145) of calculating an error between the relative frequency distribution in the original data and the relative frequency distribution in the extracted data. The search processing repetitively executes attempts of the second step to the fifth step while changing settings of the plurality of time windows. An index value of damage to a clutch for detaching an engine is calculated (S160) by using extracted data in which the error is equal to or less than a threshold value.SELECTED DRAWING: Figure 3

The invention discloses a ship shaft generator and an operation method thereof, the ship shaft generator comprises a generator and an execution device, a ship main shaft is provided with a driving belt wheel, the generator is provided with a driven belt wheel, and the driven belt wheel and the driving belt wheel are connected through a transmission belt; the driving belt wheel comprises a shaft sleeve, a middle wheel ring and an outer wheel ring, the shaft sleeve is fixedly connected to a ship main shaft, and a rotary buffering mechanism is arranged between the middle wheel ring and the outer wheel ring; a plurality of locking pieces are arranged on the middle wheel ring in a sliding mode and can move in the radial direction of the middle wheel ring. The actuating mechanism controls the locking piece to move between the locking position and the unlocking position; when the locking piece is located at the locking position, the shaft sleeve and the middle wheel ring are connected. The connecting state of the shaft sleeve and the middle wheel ring is controlled through the locking piece, when maintenance is needed, the executing device switches the locking piece to the unlocking position, the generator can be directly maintained at the moment, ship navigation is not affected, and navigation pause caused by maintenance is avoided.

The invention provides an elevator with a single-cylinder and double-cylinder switching mode and a using method of the elevator. The elevator comprises a first single-cylinder elevator, a second single-cylinder elevator and a rope adjusting clutch connected between the first single-cylinder elevator and the second single-cylinder elevator. The rope adjusting clutch comprises a bearing seat, a shaft seat inner gear ring and two fixed hubs, the shaft seat inner gear ring is rotationally connected with an inner ring of the bearing seat, the two fixed hubs are connected to a main shaft of the first single-drum elevator and a main shaft of the second single-drum elevator respectively, each fixed hub is connected with a rope adjusting outer gear ring capable of sliding in the axial direction of the fixed hub, and the rope adjusting outer gear rings are connected with the bearing seat. The rope adjusting outer gear ring is connected with a shifting ring, and the shifting ring is connected with a telescopic mechanism fixed to the single-barrel elevator. When the telescopic mechanism stretches out and draws back, the shifting ring drives the rope adjusting outer gear ring to be meshed with or separated from the shaft seat inner gear ring. And switching between two modes of independent operation of the two single cylinders and synchronous operation of the two cylinders can be realized.

The present invention relates to a hydraulic device, a hydraulic control system, a vehicle and a control method. The hydraulic device comprises a cooling and lubricating oil circuit and a pressure control oil circuit, wherein the cooling and lubricating oil circuit comprises a first oil tank, a first oil pump and a first oil circuit, the first oil tank being configured to supply oil to the first oil pump, and the first oil pump being configured to provide hydraulic oil for the first oil circuit, so as to cool and lubricate an electromechanical coupling transmission by means of the first oil circuit; the pressure control oil circuit comprises a second oil tank, a second oil pump and a second oil circuit, the second oil tank being configured to supply oil to the second oil pump, and the second oil pump being configured to provide hydraulic oil for the second oil circuit, so as to control the engagement and disengagement of a clutch of the electromechanical coupling transmission by means of the second oil circuit; and a first throttle valve is provided on the second oil circuit and configured to control the amount of oil supplemented to the second oil tank from the first oil circuit. The hydraulic device of the present invention realizes the efficient utilization of hydraulic oil.

The invention relates to the technical field of hybrid power vehicles, in particular to a clutch assembly for a hybrid power system, the hybrid power system, a control method and device of the hybrid power system, a vehicle and a storage medium. The clutch assembly includes: a power input shaft; the power input shaft is sleeved with the one-way clutch, the driving gear and the thrust transmission assembly. The one-way clutch comprises an inner ring assembly. The driving gear comprises a connecting shaft, and the outer side wall of the connecting shaft is used for being matched with the movable body of the inner ring assembly. The thrust transmission assembly is used for triggering the one-way clutch to rotate relative to the power input shaft so that the one-way clutch and the driving gear can be switched between the self-locking state and the separation state. The self-locking state means that the movable body abuts against the outer side wall of the connecting shaft; and the separation state means that a gap is formed between the movable body and the outer side wall of the connecting shaft. According to the clutch assembly disclosed by the invention, the required hydraulic pressure can be reduced, the switching efficiency of series-parallel connection modes is improved, the driving and riding comfort is improved, and the dragging and friction loss can be reduced.

A spring assembly for the clutch of an automatic transmission includes a plurality of springs residing between upper and lower retaining rings which are secured together with a plurality of fasteners. The spring assembly is compressed against the force of the springs when the clutch piston is applied to engage the clutch, and then expanded when the clutch piston is released to disengage the clutch. The fasteners of the spring assembly eliminate radial movement of the rings relative to one another and control the axial movement of either of the upper and lower spring retaining rings.

The application discloses a hydraulic control cog-type clutch four-wheel drive mechanism and a working method thereof, and belongs to the technical field of four-wheel drive mechanisms.The hydraulic control cog-type clutch four-wheel drive mechanism comprises a four-wheel drive piston and a hydraulic cylinder forming a sealed hydraulic cavity, wherein the hydraulic cavity is connected with a main oil path, the main oil path is provided with a switch valve, and the main oil path supplies oil to the hydraulic cavity when the switch valve is opened; the hydraulic cylinder is provided with an oil discharge hole; the oil discharge hole is communicated with the hydraulic cavity and discharges oil to a gearbox; the end faces of the four-wheel drive piston and the four-wheel drive output shaft are respectively provided with trapezoidal teeth capable of being engaged; the four-wheel drive output shaft is connected with a transmission output shaft through a mandrel; and the mandrel and the transmission output shaft realize radial positioning constraint of the four-wheel drive output shaft through a cylindrical roller bearing.The four-wheel drive piston is controlled by hydraulic pressure, the four-wheel drive piston and the four-wheel drive output shaft are combined or separated, power switching between two-wheel drive and four-wheel drive is realized, the tooth part structure of the cog-type clutch is designed, the cog-type clutch realizes self-centering function through the tooth end face inclination angle, and the mechanism realizes stable engagement, accurate limiting and self-locking function.

A pneumatic clutch control device of a railway vehicle comprises an air supply pipeline and a two-position three-way electromagnetic valve. The air supply pipeline is communicated between a main air reservoir of the railway vehicle air compression system and an air inlet of the pneumatic clutch; two ports of the two-position three-way electromagnetic valve are communicated with the air supply pipeline, and the other port of the two-position three-way electromagnetic valve is introduced into external atmosphere; a pressure switch I is arranged on the air supply pipeline between the two-position three-way electromagnetic valve and the pneumatic clutch; the set value of the pressure switch I is greater than the minimum value of the normal working pressure of the pneumatic clutch; a non-backpressure one-way valve and a pressure stabilizing air cylinder are sequentially arranged on the air supply pipeline between the main air cylinder and the two-position three-way electromagnetic valve; the pressure stabilizing air cylinder is provided with a second pressure switch, and the set value of the second pressure switch is larger than the maximum value of normal working pressure of the pneumatic clutch. And the controller can receive signals of the first pressure switch and the second pressure switch so as to control the two-position three-way electromagnetic valve. The boosting time of the clutch air cavity is shortened, friction plate loss in the boosting process is reduced, and the pressure is more stable when the pneumatic clutch works.

The present invention provides a clutch hydraulic system pressure compensation method and device. This method monitors the actual pressure of the clutch hydraulic system in real time and compares it with the pressures corresponding to the clutch half-engagement point KP and the clutch nonlinear point VKP. If the actual pressure is greater than the pressure corresponding to KP but less than the pressure corresponding to VKP, a base compensation amount is determined based on the pressure corresponding to VKP and the actual pressure. A correction coefficient is determined based on the current valve body oil temperature and the target pressure change rate. The clutch hydraulic system is pressure compensated using the base compensation amount and the correction coefficient. In this solution, by monitoring the actual pressure in real time and comparing it with the pressures corresponding to the clutch half-engagement point KP and the clutch nonlinear point VKP, pressure compensation is performed on the clutch hydraulic system when the actual pressure is between the pressures corresponding to KP and VKP, thereby reducing response delays and errors in the clutch hydraulic system.

A coupling device for coupling and decoupling a drive element with an output element of a drive train for a motor vehicle includes a coupling element, linearly displaceable from a coupling position to a decoupling position, a first latching device for fixing the coupling element in a one of the coupling position or the decoupling position, a first spring element for urging the coupling element into the other one of the coupling position or the decoupling position, and a first actuator arranged to cancel the fixing of the first latching device and to further load the first spring element to displace the coupling element into the other one of the coupling position or the decoupling position. In the coupling position, the coupling element couples the drive element with the output element, and, in the decoupling position, the drive element is decoupled from the output element.

The present disclosure relates to a coupling arrangement (8) comprising: an input shaft (12) and an output shaft (14), the input shaft (12) and the output shaft (14) being aligned along an axis of rotation (28); a rotor (30) of the electric machine (6), which is arranged concentrically with the rotation axis (28); a sleeve-shaped first piston (36); a sleeve-shaped second piston (38); a first coupling sleeve (40) connected to the first piston (36) and arranged to releasably couple the input shaft (12) to the output shaft (14); a second coupling sleeve (42) connected to the second piston (38) and arranged to releasably couple the rotor (30) of the electric machine (6) to the output shaft (14); and a fixed section (44) arranged between the first piston (36) and the second piston (38). The first piston and the second piston are double acting pistons arranged to be displaced relative to the fixed section.

The utility model relates to the technical field of hydraulic clutches and discloses a hydraulic clutch which is composed of a hydraulic oil cylinder, a pressing rod, a sliding sleeve, a sliding clutch and a fixed clutch, and the hydraulic oil cylinder is connected with a control valve and a hydraulic pump through pipelines to form a hydraulic control system. The clutch hydraulic control system is mainly composed of a hydraulic pump, a hydraulic oil cylinder, a control valve and a series of hydraulic pipelines, the hydraulic pump provides power and presses hydraulic oil into the hydraulic oil cylinder so as to drive the clutch to act, a motor is arranged at the rightmost end of the hydraulic clutch, and the left side of the motor is connected with a coupler with a brake wheel. According to the hydraulic clutch, a unique hydraulic control system is adopted, oil pressure can be accurately controlled, and therefore stable combination and separation of the clutch are achieved, impact on a transmission system is effectively reduced, combination and separation are stable, impact on the transmission system is reduced, the operation stability of equipment is improved, and the service life of the equipment is prolonged.

The invention relates to a valve device (5) for a hydraulic control device (4) of a transmission (3) of a motor vehicle (1). The valve device (5) comprises a first damping valve (7) having a piston (31) preloaded by a preloading force, a second damping valve (8) having a piston (41) preloaded by a preloading force, and a first multiway valve (6). The amount of oil pushed out by a shift element (24) can be collected in the respective one of the damping valves (7 / 8) depending on the switching position of the multiway valve (6), whereby the damping valve (7 / 8) involved from a certain volume on is located in a final stop position and the shift element (24) can only be pushed out (slow adjustment) by an orifice (36).

The invention discloses a dynamic coupling system, a dynamic coupling control method and a vehicle, a vehicle end coupler is additionally arranged between a driving motor at a first end and a driving motor at a second end of the vehicle, a wheel side coupler is additionally arranged between the driving motor at the first end of the vehicle and a wheel side speed reducer, and a vehicle control unit can control the driving motor according to working conditions of the driving motor. The decoupling / coupling of the wheel side coupler and / or the decoupling / coupling of the vehicle end coupler are / is carried out, so that the participation degree of the driving motor in the whole working process is optimized, and the motor capacity loss caused by the difference of road surfaces in contact with different tires is reduced.

Drive arrangement (1) for a motor vehicle drive train, comprising an internal combustion engine (2), which internal combustion engine (2) in turn has an engine housing (3) and a crankshaft (4) rotatably mounted in the engine housing (3), and a slave cylinder (6) arranged concentrically to the crankshaft (4) and designed to actuate a clutch (5) outside the engine housing (3), characterized in that the slave cylinder (6) with its actuator housing (7) is attached to a rear wall (8) of the engine housing (3).

Actuator (1, 1a, 1b), in particular hydrostatic actuator, for a motor vehicle with a rotor (3) and a stator (4) with at least one winding (8) and a circuit board (6, 6a, 6b) controlling the current supply to the at least one winding (8) and at least one connection (9) of the at least one winding (8) to the circuit board (6, 6a, 6b), wherein at least one compensating element (11, 11a) is connected to the circuit board (6, 6a, 6b) with a cantilever (12) following the path of the at least one connection (9) passing through the circuit board (6, 6a, 6b), and the at least one connection (9) and the cantilever (12) are electrically connected to each other on the side of the circuit board (6, 6a, 6b) facing away from the at least one winding (8), the at least one compensating element (11, 11a) by means of three uniformly spaced Mounting pins (13, 13a) are attached to the circuit board (6, 6a, 6b), and between a,The central part (15) receiving the boom (12) and the fastening pins (13, 13a) each has a curved arm (17, 17a), characterized in that the respective arm (17, 17a) is curved in a plane parallel to the circuit board (6, 6a, 6b).

A coupling assembly includes a shaft (102), a compensating dam (110) sealed against the shaft (102), a sealing disc (112) axially spaced from the compensating dam (110) and sealed against the shaft (102), and a piston (108). The piston (108) is sealed against the shaft (102) and is arranged axially between the compensating dam (110) and the sealing disc (112). The piston (108) encloses an opening (140) extending axially through it. A pressure chamber (132) is partially bounded by the piston (108) and the sealing disc (112). A compensating chamber (120) is partially bounded by the piston (108) and the compensating dam (110). The pressure chamber (132) is in fluid communication with the compensating chamber (120) via the opening (140).

The utility model discloses a transfer case and a vehicle, and the transfer case comprises a transfer case shell, a transfer case cover and a transfer case cover, the input shaft is located below the transfer case shell, one end, in the left-right direction, of the input shaft extends into the containing space, and the other end of the input shaft is connected with an output shaft of the engine; the driving motor comprises a driving motor shell and a motor shaft, the driving motor shell is connected with the transfer case shell, the driving motor shell and the input shaft are arranged in a vertically spaced mode, and the motor shaft is selectively in transmission connection with the input shaft. Therefore, the driving motor shell is integrated on the transfer case shell, and the driving motor shell and the input shaft are arranged at intervals up and down, so that the driving motor and the engine can be separately arranged, heat dissipation of the motor is facilitated, in addition, the motor shaft and the input shaft are selectively in transmission connection, and increase of kinetic energy of the engine or additional consumption of kinetic energy of the motor can be avoided; therefore, the energy consumption of the whole vehicle can be reduced, and the NVH performance of the whole vehicle

A hydraulic or pneumatic actuating arrangement with a multi-disk switching element having an actuating cylinder (8) connected to a hydraulic or pneumatic supply for actuating a disk pack of the multi-disk switching element, wherein a double-acting actuating cylinder (8) is provided with a first pressure chamber (10) associated with a first piston surface (9) and a second pressure chamber (12) associated with a second piston surface (11), wherein the two piston surfaces (9, 11) have different effective areas, wherein the first pressure chamber (10) and the second pressure chamber (12) are connected to one another during a first actuating phase to overcome a clearance (s) in the multi-disk switching element, and wherein the first pressure chamber (10) and the second pressure chamber (12) are separated from one another during a second actuating phase to close the multi-disk switching element, characterized in thatthat in the first actuation phase, the first pressure chamber (10) and the second pressure chamber (12) are subjected to a first actuation pressure (P1) of the hydraulic or pneumatic supply, and that in the second actuation phase, the first pressure chamber (10) is subjected to a second, higher actuation pressure (P2) of the hydraulic or pneumatic supply, and the second pressure chamber (12) is depressurised.

A clutch device 210 includes a pressure plate 270 movable toward or away from a clutch center 240, rotatable relative to the clutch center 240, and operable to press input-side rotating plates 20 and output-side rotating plates 22. The pressure plate 270 is rotatable in a first circumferential direction S1. An oil flow hole 279 is located in spline grooves 278 to penetrate an outer peripheral wall 275 of the pressure plate 270, and allows clutch oil that has flowed out of the output shaft 15 to be discharged to outside of the pressure plate 270. In circumferential directions S, the oil flow hole 279 is located between an end 90SB of a pressure-side slipper cam surface 90S in a first circumferential direction S1 and a pressure-side cam holes 273H located ahead, in a second circumferential direction S2, of the end 90SB in the first circumferential direction S1.

This application proposes a method, device, vehicle, equipment, and medium for determining the engagement point of a hydraulic clutch, relating to the field of clutch control technology. The method analyzes whether the pressure value change trend during the oil filling process conforms to a preset trend. This preset trend characterizes the pressure value change trend during the oil filling process as the pressure value transitions from a relatively stable rate of increase to a state of continuously increasing rate of increase. Based on this, the inflection point where the pressure value changes from a stable increase to rapid pressure increase is determined throughout the entire oil filling and pressure building process. This inflection point can be considered as the point where the pressure in the hydraulic circuit exhibits a rapid upward trend due to the resistance of the hydraulic clutch's driving end during engagement. The pressure value corresponding to this point can be used as the pressure value of the clutch engagement point. This method eliminates the need to start high-pressure equipment such as motors / engines, allowing operation under low-pressure conditions, reducing influencing factors, and ensuring the stability and accuracy of self-learning.

A dual clutch transmission for a motor vehicle power train for selectively coupling rotating transmission members includes a base assembly, a bearing mounted rotating assembly which is rotatable with respect to the base assembly, first and second torque transmission assemblies movable between disengaged and engaged positions, and first and second actuation mechanisms associated with the first and second torque transmissions assemblies. The actuating mechanisms are arranged for moving the respective torque transmission assemblies between the disengaged and engaged positions for selectively coupling the transmission members. The first torque transmission assembly couples two rotating members in the engaged position. The first actuating mechanism includes a hydraulic actuating mechanism having a piston chamber and a piston for moving the first torque transmission assembly between the disengaged and engaged positions. The piston chamber is arranged in the base assembly, and the piston actuates the first torque transmission assembly in the rotating assembly.

Triple-plate clutch arrangement with three friction clutches (K1, K2, K0) having radially offset plate packs on plate carriers (9, 10, 11, 12), with pistons (13, 14, 15) for actuating the friction clutches, wherein a support disc (7) is arranged between the clutch output of one clutch (K1) and the clutch input of another clutch (K0), which serves as a support when actuating at least one of the clutches (K1, K2, K0), characterized in that the support disc (7) is attached to the input hub (4), which is connected via a support (8) to a common plate carrier (9) for the friction clutches (K0 and K1), and the support disc (7) is a sheet metal part of at least one piece, wherein the support disc (7) consists of a radially extending part (7A) and two wings (7B, 7C), each of which has one of the wings attached to the The lamellar pack is connected to one of the couplings (K1, K2, K0).

The utility model discloses a gear core assembly of an advertisement barrier gate, which belongs to the technical field of advertisement barrier gates and comprises a mounting seat, a plurality of mounting bolts are mounted on the mounting seat in a threaded manner, a transverse plate is fixedly mounted on the upper surface of the mounting seat, a vertical plate is fixedly mounted on the upper surface of the transverse plate, and a motor is fixedly mounted on the side surface of the vertical plate. A rotating shaft I and a rotating shaft II are rotationally mounted on the vertical plate, a mounting disc is fixedly mounted at one end of the rotating shaft II, and a plurality of mounting holes are formed in the mounting disc; the first motor is matched with the first rotating shaft, the first gear, the second gear and the second rotating shaft for use, the first gear and the second gear are arranged between the first motor and the stop lever for transmission, and the first gear and the second gear are matched with the air cylinder to drive the toothed plate and the second gear to be meshed. When the motor is directly connected with the stop lever, the phenomenon that parts in the motor are damaged due to the fact that the stop lever bears large acting force is avoided, and long-time stable work of the whole device is guaranteed.

A concentric slave cylinder 3 is proposed, comprising an annular housing 5 which has a pressure chamber 7 rotating around a main axis 100, wherein the annular housing 5 has an axial fluid connection opening 22 fluidically connected to the pressure chamber 7, an annular piston 6 which is axially movably received in the annular housing 5 and limits the pressure chamber 7 in an axial direction 101 with respect to the main axis 100, an outer and an inner piston seal 11, 12 for sealing the pressure chamber 7, wherein the annular piston 6 has an outer sealing receptacle 13 on its outer circumference for receiving the outer piston seal 11 and an inner sealing receptacle 14 on its inner circumference for receiving the inner piston seal 12, and a sealing device 21 for sealing the annular housing 5 against a housing section 2.wherein the sealing device 21 for sealing the fluid connection opening 22 is supported against an environment in the axial direction 101 on an end face of the ring housing 5 and in at least one radial direction 103, 104 on at least one support section 24, 25 of the ring housing 9.

A clutch actuation device includes a sliding sleeve and an actuation bell for axially displacing the sliding sleeve. The sliding sleeve is axially displaceable for engaging and disengaging a clutch. The actuating bell has a main body and an elastic spring element. The main body is arranged for transmitting a first axial force to the sliding sleeve in a first axial direction. The elastic spring element is arranged for transmitting a second axial force to the sliding sleeve in a second axial direction, opposite the first axial direction. The actuating bell may have an axial stop formed on the main body for transmitting the first axial force directly to the sliding sleeve.

The invention relates to a hydraulic brake, clutch or clutch-brake combination for a work machine, which is designed to be switchable by means of a hydraulic medium delivered by a hydraulic pump (18), with a rotor disk (4) arranged on a shaft in a rotationally fixed but axially displaceable manner and a counterpart (15) cooperating therewith, wherein the counterpart (15) is mounted axially displaceably in relation to the rotor disk (4), with a mechanical force transmitter (17) designed to apply force to the counterpart (15) in the axial direction, and with a hydraulic piston (13) provided by a cylinder-piston arrangement (12), which is designed to be movable in the axial direction and is designed to act on the counterpart (15) in the event of pressure being applied with hydraulic medium delivered by the hydraulic pump (18) in a manner counter to the force applied by the force transmitter (17), characterized in thatthat the hydraulic pump (18) fluidically interacts with a reservoir (20) accommodating hydraulic fluid, wherein the hydraulic pump (18) and the reservoir (20) are designed for intended use exclusively with the cylinder-piston arrangement (12), and that a bypass line (24) is provided which fluidically bypasses the hydraulic pump (18) and fluidically connects the reservoir (20) to the cylinder-piston arrangement (12), wherein an electrically switchable valve (25) is integrated into the bypass line (24) and is designed to open the bypass line (24) in the event of a de-energized position of the valve (25).

The planetary reducer, powertrain, and vehicle are characterized in that the planetary reducer (A) includes a housing (1), a sun gear (2), an internal gear (4), a plurality of planetary gears (3), and a planet carrier (5), and further includes a cylindrical portion (6) fitted to the outside of the internal gear, a sleeve portion (7) fitted to the outside of the cylindrical portion, an elastic portion (8) installed between the cylindrical portion and the sleeve portion, a first friction ring (60) attached to the cylindrical portion, a second friction ring (50) attached to the planet carrier, a third friction ring (70) attached to the sleeve portion, a fourth friction ring (10) attached to the housing portion, and a controller (9) attached to the housing portion, and the first friction ring and the second friction ring are provided alternately between the sleeve portion and the cylindrical portion, and the third friction ring and the fourth friction ring are provided alternately between the controller and the sleeve portion. This planetary reducer effectively simplifies the structural design and reduces the difficulty of control. When used in a vehicle, it can realize the interlocking control of the brake and clutch, and ensure that there is no loss of driving force when the vehicle changes gears.

The present application relates to the technical field of clutches, and discloses a wet clutch for a pure electric multi-gear transmission, which comprises an outer shell, the inner side of the outer shell is movably connected with an input gear for transmitting motor torque, the outer part of the input gear is fixedly connected with an inner shell for connecting and matching the input gear, and the inner part of the outer shell is movably connected with a partition plate. The input gear and the inner shell transmit torque, and multiple partition plates, friction plates and back plates cooperate to realize the transmission of different torques, thereby improving the transmission of different gears, large torque and high speed of the electric drive clutch. The electric drive clutch internally adopts simple mechanical components such as input gears, partition plates, friction plates, back plates, acting pressure plates, piston shells, balance pistons and cooperating pistons, which not only reduces the structural space of the electric drive clutch, but also reduces the complexity of the electric drive clutch, and improves the practicability and stability of the electric drive clutch.

To provide a service evaluation system that enables a driver to properly use a clutch.SOLUTION: A service evaluation system 100 comprises a vehicle-mounted device 1 including a rotation speed acquisition unit 18a and a vehicle speed acquisition unit 18b, and a server 2 including a half clutch determination unit 22 and a feedback unit 23. The rotation speed acquisition unit 18a acquires an engine speed of a vehicle V. The vehicle speed acquisition unit 18b acquires a vehicle speed of the vehicle V. The half clutch determination unit 22 determines a half clutch of the vehicle V based on the engine speed acquired by the rotation speed acquisition unit 18a and the vehicle speed acquired by the vehicle speed acquisition unit 18b. The feedback unit 23 analyzes a determination result of the half clutch by the half clutch determination unit 22, and feeds back the analysis result to the driver of the vehicle V.SELECTED DRAWING: Figure 2