18 results about "Dog clutch" patented technology

A system and method for a hybrid electric axle. The hybrid electric axle system, in one example, includes an engine interface assembly with a one-way clutch that is rotationally coupled to an input shaft and a gear shaft in a gear set that is rotationally coupled to a differential and a dog clutch configured to selectively rotationally couple the input shaft and the gear shaft in the gear set. The hybrid electric axle system further includes an electric drive assembly including a traction motor that is rotationally coupled to a gear train. In the electric axle system, the gear train is rotationally coupled to the differential and the engine interface assembly and the electric drive assembly are packaged in an axle housing.

A dog clutch includes a first clutch member and a second clutch member. The first clutch member is rotatable about an axis and has first teeth spaced apart in a circumferential direction. Each tooth has a first face and a second face with different axial lengths. The second clutch member is rotatable about the axis relative to the first clutch member and has second teeth each having first and second faces with different axial lengths. When the first and second clutch members are in an engaged state in which the first teeth are received in the second pockets and the second teeth are received in the first pockets, the axially longer faces of the first teeth are adjacent to the axially longer faces of the second teeth. The dog clutch can be provided in a differential of a vehicle.

Provided in the present application are a dog clutch, a differential assembly, and an automobile. The dog clutch comprises a dog clutch body, wherein the outer side of the dog clutch body is provided with first engagement teeth arranged outward in the radial direction, and the inner side of the dog clutch body is provided with second engagement teeth arranged inward in the radial direction. In the present application, the dog clutch comprises the dog clutch body, wherein the outer side of the dog clutch body is provided with the first engagement teeth arranged outward in the radial direction, and the inner side of the dog clutch body is provided with the second engagement teeth arranged inward in the radial direction, such that each of the first engagement teeth and the second engagement teeth can be engaged with or disengaged from one component; on the basis of combinations of the states of the two engagement teeth, switching can be realized between at least three functions. Compared with the prior art where switching can only be realized between two functions, the present application helps greatly improve the integration level and reduce the number of components and weight, thereby facilitating structural arrangement and providing a simple structure and low cost.

The present invention relates to a system for coupling transmission shafts (1), the system comprising: - a drive shaft; - a driven shaft coaxial with the drive shaft; - a dog clutch sleeve (30) arranged so as to move along a first axis of rotation (X) in order to couple the drive shaft to the driven shaft; - a casing (50) surrounding the drive shaft and the driven shaft, which comprises a casing end (61) through which the drive shaft passes; - an actuating device (10) comprising an interface component (20) inserted into a receiving cavity (31) formed in the dog clutch sleeve, the interface component being arranged so as to axially move the dog clutch sleeve (30) between a first uncoupling end position and a second coupling end position, wherein the casing end (60) comprises a lubricating fluid collecting portion (61) and a lubricating fluid retaining portion (62) distributed about the first axis of rotation (X).

To provide a vehicle control device that can stably engage the clutch. [Solution] In the case of straight-line driving where the steering angle θsw of the vehicle 10 is less than or equal to a first predetermined value θn and the difference in front and rear wheel rotation speeds ΔNw is less than or equal to a second predetermined value NWn, the electronic control unit 80 calculates the synchronous rotation speed Ntgt from the MG1 rotation speed Nmg1. As a result, in the case of straight-line driving, the MG1 rotation sensor 94, which has high detection accuracy, is used instead of the second wheel speed sensor 92, which has low detection accuracy, in the engagement control of the dog clutch 60, and the rotation synchronization of the first dog teeth 60a and the second dog teeth 60b is performed with high accuracy, so that the engagement control of the dog clutch 60 is performed stably.

Title of the invention: Transmission shaft coupling system and transmission comprising such a transmission shaft coupling system The present invention relates to a transmission shaft coupling system (1) comprising: - a driving shaft; - a driven shaft coaxial with the driving shaft; - a dog clutch sleeve (30) arranged to move along a first axis of rotation (X) to couple the driving shaft with the driven shaft; - a housing (50) surrounding the driving shaft and the driven shaft which includes a housing end (61) through which the driving shaft passes;- an actuation device (10) comprising an interface component (20) inserted within a receiving housing (31) formed in the dog clutch sleeve, the interface component being arranged to axially move the dog clutch sleeve (30) between a first extreme disengagement position and a second extreme engagement position, in which the housing end (60) comprises a lubrication fluid collection portion (61) and a lubrication fluid retention portion (62) distributed around the first axis of rotation (X). Abstract figure: Figure 2;

A dog clutch engagement control system is provided, including a dog clutch with first and second clutch members connected to input and output shafts, each having engagement teeth arranged circumferentially. The clutch members can switch between engaged and disengaged states, either directly or via an intermediate member. A clutch actuator moves the clutch members or the intermediate member axially. The system further includes a phase difference sensor for detecting a phase difference between the clutch members and a controller that outputs drive instructions to the actuator based on engagement timing. The controller predicts future engagement timing using sensor output and estimated input shaft speed, enabling precise synchronization during clutch engagement.

Method for operating a dog clutch in a motor vehicle with an electric motor drive, in which the two clutch parts (11a, 11b) of the dog clutch (11) transmit a force between the electric motor drive (2) and an axle (8) having wheels (9, 10) of the motor vehicle and are set to a predetermined speed difference between the axle (8) and the electric motor drive (2) before the dog clutch (11) is closed, wherein the predetermined speed difference is formed from a synchronization speed of the electric motor drive (2) and a speed of the wheel (9, 10) of the motor vehicle, wherein during the operation of the motor vehicle with the dog clutch (11) not closed the electric motor drive (2) is accelerated to a speed which lags behind the synchronization speed, characterized in thatthat, with the claw clutch (11) open, before the moment of an engagement signal, the electric motor drive (2) is operated in a freewheeling state by interrupting a connection between the electric motor drive (2) and an energy source (15) of the electric motor drive (2), whereupon the electric motor drive (2) is accelerated by a drag torque of a transmission (12), the transmission (12) being moved via the axle (8) supporting the wheels (9, 10) of the moving motor vehicle, so that before the moment of the engagement signal the passive electric motor drive is accelerated by the drag torque to a speed which lags behind the synchronization speed.

The application discloses a kind of dog clutch separation control method, device, equipment and storage medium, it is related to clutch control technical field, discloses dog clutch separation control method, comprising: when vehicle exits parallel driving mode, the engine is reduced torque, and current output torque of engine and driven end current load torque are acquired;According to current output torque of engine and driven end current load torque control the first motor runs, and the transmission net torque of the dog clutch is acquired;When the transmission net torque is stable in the preset zero load interval within first preset time length, determine perturbation parameter according to second motor rated torque;Based on the perturbation parameter control the second motor runs, to complete dog clutch separation.This scheme can realize the effect of timely control hybrid dog clutch separation while ensuring the stability of dog clutch separation.

This invention discloses a series-type interlocking toothed clutch, belonging to the field of electromagnetic clutch technology. It includes an end driving plate, an end driven plate, at least one set of intermediate clutches, an electromagnetic drive assembly, an interlocking toothed engagement assembly, and a reset assembly. The interlocking toothed engagement assembly consists of a grooved plate and interlocking toothed plates, with each intermediate clutch having a different number of teeth on its interlocking toothed plate. The reset assembly keeps the clutches in a normally closed engagement state. When energized, one clutch can be energized at a time, causing its corresponding interlocking toothed plate to disengage from the grooved plate. After de-energization, the interlocking toothed plate rotates to the next groove under the action of the reset assembly and automatically engages. This invention utilizes the different groove angles corresponding to different numbers of teeth, achieving precise control of a specified rotation angle with a single pulse current signal. It features a compact structure and extremely simple control, applicable to valve timing control in rotary engines, and can also be applied to robot joints, precision rotary tables, and other fields.

The present disclosure provides a system (200) and a method (300) for managing gear shifts in a vehicle (10). The method (300) receives a gear shift request from a user, and momentarily adjusts a temporary torque of a motor to facilitate disengagement of a dog clutch from a gear. The method (300) determines a subsequent gear shift when the dog clutch is successfully disengaged, estimates a Revolutions Per Minute (RPM) for the subsequent gear shift, and adjusts a rotational speed of the motor to match the RPM of the subsequent gear shift to facilitate successful engagement of the dog clutch to a pre-defined gear. If the dog clutch is engaged to the pre-defined gear, the method (300) ramps up or ramps down the temporary torque of the motor to a user requested torque for enabling fast and precise gearshifts, and providing smoother driving experience to the user.

The present invention provides a vehicle control device that can suppress the over-revving of the vehicle's drive motor. [Solution] The vehicle 10 includes a front motor MGf, dog clutches 32 connected to the front motor MGf and a pair of front wheels 14, respectively, and an actuator 40 for engaging the dog clutches 32. The electronic control device 90 (a) determines whether the motor operating angle φact is greater than or equal to the operating angle determination value φact_jdg, (b) if it is determined that the motor operating angle φact is greater than or equal to the operating angle determination value φact_jdg, it increases the MGf torque Tmgf at an increase rate α that can reliably engage the meshing teeth 36d of the second gear 36 with the meshing teeth 34d of the first gear 34, and (c) if the MGf torque Tmgf becomes greater than or equal to the torque determination value Tmgf_jdg, it increases the MGf torque Tmgf at an increase rate β that is greater than the increase rate α.

Methods and systems for shifting a transmission that includes a dog clutch are described. In one example, the transmission may be coupled to an electric machine and a rotational speed of the electric machine may be adjusted to reduce a speed differential between rotating transmission components. A position of a shifter actuator may be adjusted according to an estimate of when the speed differential is equal to a predetermined value.

The invention relates to a method for managing the operation of a combustion engine (2) of a hybrid motor vehicle (1) having a dog clutch gearbox (4) driven by at least one electric motor (3), wherein the method is implemented by a data processing device (100) on board the vehicle. The invention also relates to a device (100) implementing such a method, and to a motor vehicle (1) comprising such a device.

The present invention describes a dog clutch assembly for a vehicle transmission and a method for controlling it. The dog clutch assembly (114) comprises a first clutch disc (202) connected to a rotating element (108) and movable along an axial direction, and a second clutch disc (208) with sensor elements (212) arranged between adjacent second teeth (214). An actuator (218) moves the second teeth (214) between a retracted and an extended position. When the first clutch disc (202) moves towards the second clutch disc (208), the contact between the first teeth (206) and the sensor elements (212) generates a signal.This signal indicates when the first and second clutch discs (202, 208) are correctly aligned for engagement and prompts the actuator (218) to extend the second teeth (214), enabling smooth engagement of the first and second clutch discs (202, 208). This ensures reliable and efficient operation and facilitates seamless clutch engagement.

The invention relates to a switchable dog clutch (1) having a first clutch partner (2) which has a first dog toothing (12) and can be rotated about an axis of rotation (3), a second clutch partner (4) which has a second dog toothing (14) for engagement in the first dog toothing (12), characterized by a blocking element (5) which can be displaced radially with respect to the axis of rotation (3) by centrifugal force, is arranged axially between the two clutch partners (2, 4), in a radially outer position is supported on a first support surface (6) of the first clutch partner (2) and on a second support surface (8) of the second clutch partner (4), in a radially inner position axially overlaps with at least one of the two support surfaces (6, 8). The invention furthermore relates to an internal combustion engine having a dog clutch of this type.

The present invention provides a vehicle control device that improves the responsiveness of clutch state determination during vehicle startup. [Solution] When the first electric motor MG1 is driven and the vehicle 10 is started using only the rear wheels 14, the electronic control unit 80 determines that the dog clutch 60 is engaged if the front-to-rear wheel speed difference ΔVmg, which is the absolute value of the difference between the first vehicle speed Vmg1 calculated from the first rotational speed Nmg1 and the second vehicle speed Vmg2 calculated from the second rotational speed Nmg2, is less than or equal to the first threshold N1. As a result, the determination of the state of the dog clutch 60 when the vehicle 10 is started is performed using the first rotational speed Nmg1 and the second rotational speed Nmg2 detected by the MG1 rotation sensor 90 and the MG2 rotation sensor 92, which have no time lag until detection (output), instead of using the wheel speed sensor 94 which has a time lag until detection (output). This improves the responsiveness of the determination of the state of the dog clutch 60 when the vehicle 10 is started.

The utility model provides a kind of dog clutch assembly, belong to clutch technical field. Bidirectional large torque transmission function can be realized, with quick response, high reliability and light weight characteristics, suitable for aircraft hybrid transmission. Including engine shaft, motor gear, sliding sleeve, normal pressure spring and piston assembly;The motor gear is installed on engine shaft by needle bearing, the sliding sleeve one end is engaged with engine shaft, through oil pressure, normal pressure spring and piston assembly cooperation, sliding sleeve other end and motor gear present engagement or disengagement state. The utility model is compact in structure, adopts engagement element rigid connection, with self-locking function, can realize bidirectional power transmission function, reliably transmit torque, strong carrying capacity, can quickly respond clutch separation or engagement, guarantee operation safety, meet the demand of aircraft hybrid system transmission large torque, quick response, high reliability, light weight design.