438 results about "Gear ratio" patented technology

A computer system has processing circuitry to selectively operate the powertrain system in at least a freewheeling mode, in which an output shaft of the engine is non-rotating, and the engine is disconnected from the one or more drive wheels. The processing circuitry is further configured to: determine an opportunity for the freewheeling mode by predicting a feasibility of restarting the engine along an intended route by using a controllable clutch. Predicting the feasibility of restarting the engine by using the controllable clutch includes determining fulfillment of any one of a first restarting condition and a second restarting condition. Determining fulfillment of the first restarting condition includes comparing current total weight of the vehicle with a threshold value indicative of a minimum total weight for avoiding excessive braking of the vehicle during restarting at a high friction road condition with a given total gear ratio. Determining fulfillment of the second restarting condition includes comparing a current drive axle load with a corresponding threshold value indicative of a minimum drive axle load on a drive axle for avoiding excessive wheel slip during restarting at a low friction road condition with a given total gear ratio. The powertrain system is controlled into the freewheeling mode upon the fulfillment of any one of the first restarting condition and the second restarting condition.

An electric drive assembly for operation with a work vehicle component using an SAE standard hydraulic pump / motor mount includes an electric machine with a shaft and a mounting flange. An adapter housing defines an interior space between a component mounting flange and an electric machine mounting flange. The electric machine mounting flange is sized and configured to mate with the electric machine mounting flange. The component mounting flange has a bolt hole pattern and mounting pad that are complementary in size and configuration to those of the SAE standard hydraulic pump / motor mount. A gear set, located at least partially within the interior of the adapter housing, is configured to effect a change in gear ratio and transmit power between the electric machine shaft and a drive shaft.

The invention relates to the technical field of kitchen appliance control, and discloses a chef machine and a control method thereof. According to the method, a stirring mode instruction is received through an operation interface, and a stirring mode comprises a preset non-constant-speed double-linkage mode and corresponds to a plurality of transmission gear ratio parameters; according to the transmission gear ratio parameter, determining a target rotating speed ratio of a driving motor for driving a stirring head to a stirring barrel base; if it is detected that the stirring head and the upper transmission shaft are in a connected state and the stirring barrel is fixed, calculating the output rotating speed and torque parameters of the driving motor based on the target rotating speed ratio; generating a driving instruction according to the output rotating speed and the torque parameter and sending to a driving motor; in the running process of the driving motor, motor current and rotating speed sensor data are collected in real time, if it is detected that load torque exceeds a preset safety threshold value, motor output power is reduced or running is stopped, and overload alarm is triggered; if it is detected that the rotating buckle of the stirring barrel base and the machine base is loosened, the driving motor and the electromagnetic heating are stopped.

A human-electric hybrid powertrain with a continuously variable transmission achieved with the use of a bevel planetary gearset. Two electric motors are utilized to produce a hybrid powertrain with either a driveshaft, chain, or belt driveline. The electric motors combine to produce an infinitely variable range of gear ratios and power assistance to the operator.

The invention discloses a self-adaptive riding speed control system and method, and relates to the technical field of vehicle control, the system collects motion state data of a riding vehicle in real time through a sensor group installed on the riding vehicle, and after preprocessing, a vehicle attitude data set and a riding condition data set are formed; the method comprises the following steps: performing gradient state evaluation by calculating a gradient trend index slo, performing pedaling frequency stability analysis when the evaluation is about to enter an uphill stage and a downhill stage, calculating a pedaling frequency stability index wca through a riding condition data set, and then combining the pedaling frequency stability index wca with the gradient trend index slo to construct a comprehensive tooth ratio stability index Gopt to perform comprehensive riding stability evaluation. Therefore, the rationality of tooth ratio adjustment is judged, a tooth ratio switching instruction of the front disc and the rear flywheel is sent out, self-adaptive adjustment and control of the tooth ratio under the stable states of different gradients and different pedaling frequencies are achieved, the power matching and energy utilization efficiency in the riding process is effectively improved, the load of a rider is relieved, and the riding stability is enhanced.

A manual transmission (SG) for a vehicle (100) comprising a first shifting element (A), a second shifting element (B), a first planetary gear set (PS1) with a first sun shaft (SO1), a first ring gear shaft (HR1) and a first carrier shaft (ST1), and a second planetary gear set (PS2) with a second sun shaft (SO2), a second ring gear shaft (HR2) and a second carrier shaft (ST2), wherein the first planetary gear set (PS1) and the second planetary gear set (PS2) are radially nested, wherein the first sun shaft (SO1) and the second carrier shaft (ST2) are rotationally fixed, wherein the first ring gear shaft (HR1) and the second sun shaft (SO2) are rotationally fixed to a stationary component, wherein in the closed state of the first shifting element (A) a first gear with a first ratio is engaged, wherein in the first gear the second ring gear shaft (HR2) is configured as the input and the first carrier shaft (ST1) as the output,• wherein, in the closed state of the second switching element (B), a second gear with a second gear ratio is engaged, wherein in the second gear the second ring gear shaft (HR2) is configured as the input and the second web shaft (ST2) as the output.

[Problem] A transmission structure that may improve a traveling feeling when a drive traveling state is interrupted in traveling and then the drive traveling state is resumed is provided. [Solution] A control device actuates a clutch actuator so that only a clutch mechanism on a most downstream side in a transmission direction in a selected shift gear is brought to a disengaged state when receiving a power cut-off signal in a state in which a traveling state change member is subjected to a forward operation or a reverse operation, and, actuates the clutch actuator so that only the clutch mechanism on the most downstream side in the transmission direction in the selected presumed shift gear is brought to a disengaged state based on a traveling state, and in addition, actuates a gear shift actuator so that a gear ratio of a continuously variable transmission mechanism that realizes a vehicle speed at that time point in the presumed shift gear is obtained while the power cut-off signal is valid, and actuates the clutch actuator so that the clutch mechanism on the most downstream side in the transmission direction in the presumed shift gear at that time point is brought to an engaged state when a cancel signal for canceling the power cut-off signal is input.

This invention relates to the field of hydropower station equipment testing technology, and in particular provides a motion control system based on a programmable automation controller. The system includes a dual-motor drive module, a multi-axis transmission mechanism, and a closed-loop control core module. The dual-motor drive module consists of a rotary mechanism and a Z-axis lifting mechanism. The multi-axis transmission mechanism converts motor power into mechanical motion through a lead screw and nut pair and a gear and rack assembly, ensuring the rigidity and accuracy of power transmission. The closed-loop control core module uses a PAC ADVANCE controller as its core, integrating a Z-axis displacement sensor and a rotary axis angle encoder. It controls the dual motors through pulse direction signals and uses an electronic gear ratio configuration function to convert pulses into actual displacements. In the motion control of a hydropower turbine flow channel inspection robot, this system solves the problems of insufficient accuracy, low flow channel switching efficiency, and high safety risks.

Mechanical infinitely variable transmissions (IVTs) and vehicles employing such IVTs are discussed. The IVT can comprise a planetary gearset with a sun gear driven based on an input angular velocity and an annulus gear driven based on a combination of the input angular velocity and a variable gear ratio of a pulley system, wherein the variable gear ratio of the pulley system can be electrically controlled by an actuator. A drive element can be driven based on a carrier of the planetary gearset.

A method for power transmission method includes providing first and second shafts, a gear assembly having first and second gear ratios, and first and second coupling assemblies. The first coupling assembly enabling torque transfer from the first shaft to the second shaft, and the second coupling assembly enabling torque transfer from the first shaft to the second shaft. The speed of the first shaft varies, wherein the deployment of a locking element of the second coupling assembly is based on the speed of the first shaft.

The invention relates to the technical field of industrial control, in particular to a configuration method for taking a servo drive as an external encoder, which comprises the following steps: taking a first control unit as an external encoder and configuring the external encoder as an absolute value mode, taking a second control unit as a main drive unit and setting the external encoder as a full-closed-loop control mode, and converting absolute position data of a first motor into absolute position data of a second motor; the signal is converted into an incremental pulse signal, and the pulse signal is used as feedback data to be transmitted to a second servo driver for full-closed-loop position correction; recording the pulse number of the second motor and the feedback pulse number of the first control unit, calculating an electronic gear ratio, and writing the electronic gear ratio into a second servo driver; an excitation signal is injected into the second servo driver through the upper computer, response data of the second motor and the load end are recorded, gain parameters are calculated and adjusted based on the dynamic characteristics of the mechanical transmission chain of the load end, and the gain parameters are written into the second servo driver. Servo serves as an encoder, and absolute value full closed loop is achieved.

The invention relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for the transmission speed ratio of an electric truck, which comprises the following steps of: 1.1, performing matching and parameter configuration on the power, the torque and the rotating speed of a driving motor according to the whole vehicle parameter, the performance index and the working condition load characteristic of the electric truck; 1.2, performing optimization configuration on energy, capacity and voltage parameters of a power battery based on the energy consumption characteristic of the whole vehicle and the endurance mileage requirement; 1.3, analyzing constraint conditions which need to be met by the transmission speed ratio, wherein the constraint conditions comprise the maximum vehicle speed, the gradeability and the acceleration performance. The transmission speed ratio of the electric truck is optimized through the deep Q network improved multi-objective evolutionary algorithm, dynamic property and economic indexes can be comprehensively considered, and multi-objective optimization of transmission speed ratio parameters is achieved. Compared with a traditional optimization method, the power performance indexes such as acceleration time and gradeability can be effectively balanced, energy consumption per hundred kilometers can be remarkably reduced, and the economical efficiency of the whole vehicle is improved.

The present invention provides a control device for a human-powered vehicle that can suitably control the transmission. [Solution] The control device for a human-powered vehicle includes a control unit configured to control a transmission that changes the gear ratio, which is the ratio of the wheel rotation speed of the human-powered vehicle's wheels to the rotation speed of the crankshaft of the human-powered vehicle. The control unit is configured to control the transmission to change the gear ratio based on a gear condition relating to at least one of the wheel rotation speed and the crankshaft rotation speed. Even if the gear condition is not met, the control unit is configured to control the transmission to decrease the gear ratio if the human-powered driving force input to the crankshaft is greater than a threshold. The control unit is configured to set the threshold to a first threshold when the state of the human-powered vehicle is a first state, and to set the threshold to a second threshold different from the first threshold when the state of the human-powered vehicle is a second state different from the first state.

A power transmission system and device, comprising: a first shaft rotatable at a variable speed; a second shaft rotatable at a variable speed; a planetary gear assembly between the first shaft and the second shaft, the planetary gear assembly having at least a first gear ratio and a second gear ratio; wherein the first gear ratio has a torque reaction path; wherein the second gear ratio has a torque reaction path; a first clutch assembly having a torque-transmitting locking member, the first clutch assembly positioned in the torque reaction path of the first gear ratio; a second clutch assembly having a torque-transmitting locking member, the second clutch assembly positioned in the torque reaction path of the second gear ratio;a control unit, the control unit using a sensor to determine the speed of the second shaft, the speed of the second shaft and the second gear ratio being used to determine an input speed of the second gear ratio; and a motor connected to the first shaft, the motor varying the speed of the first shaft relative to the input speed of the second gear ratio such that engagement of the torque-transmitting element of the second clutch assembly is based on the speed of the first shaft relative to the input speed of the second gear ratio.

The invention relates to a method for correcting the handle position of a manually and motor-operated window, which has a handle whose manual rotation is translated by means of a gearbox into a pushing movement of a push rod having at least one locking element, wherein the gearbox has as translating gearbox elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and which has a drive with which, by applying force to a push rod lying in a fitting groove of the sash frame, the push rod is pushed in active operation and the handle is turned indirectly via the gearbox, wherein at least one of the translating gearbox elements in the gearbox is exchanged for a replacement element and thereby the gearbox with the at least one replacement element achieves a higher gear ratio.The invention also relates to a window of the aforementioned type, in which the gear ratio between two operating positions is greater than 5.0 degrees per 1 millimeter of stroke of the push rod, in particular greater than 5.1 degrees per 1 millimeter of stroke of the push rod, in particular greater than 5.25 degrees per 1 millimeter of stroke of the push rod, and more preferably greater than 5.35 degrees per 1 millimeter of stroke of the push rod. The invention also relates to a set comprising a window drive for installation in the frame of a window and a replacement gear element.

A table saw includes a base assembly, a table assembly supported by the base assembly, a saw blade, and a saw assembly supported by the table assembly. The saw assembly includes a motor having a motor output shaft, a power train assembly with an arbor shaft to which the saw blade is fixedly connected, an intermediate shaft, a first gear stage connecting the motor output shaft to the intermediate shaft with a first gear ratio, and a second gear stage connecting the intermediate shaft to the arbor shaft with a second gear ratio that is less than 1.25. The saw blade has a diameter of 254 mm and the saw blade extends by up to 102 mm above the support surface in a maximum cutting height position of the saw assembly.

Vehicle control device (10) comprising an internal combustion engine (11) and an electric motor, wherein the device (10) comprises: a clutch (17) which is arranged in a power transmission path (40) which couples the internal combustion engine (11) and the drive wheels (22); a first driving control device that performs an electric motor drive in which the drive wheels (22) are driven by the electric motor in a state in which the clutch (17) is disengaged to decouple the internal combustion engine (11) from the drive wheels (22) and the internal combustion engine (11) is stopped; a second driving control device that performs a co-rotating drive in which the clutch (17) is engaged, while fuel injection of the internal combustion engine (11) is stopped in a state in which the electric motor drive is performed, and the internal combustion engine (11) is rotated during the drive; an electric motor control device that increases an output torque (Tm1) of the electric motor when the driving mode switches from electric motor driving to pedal-assisted driving; and a transmission mechanism (16) arranged in the power transmission path (40) that couples the internal combustion engine (11) and the drive wheels (22); characterized by a transmission control device (72) that reduces a gear ratio of the transmission mechanism (16) when the driving mode switches from electric motor driving to co-rotating driving, wherein the gear ratio is a ratio of the input shaft speed to the output shaft speed of the transmission mechanism (16).

The present application relates to a mechanical arm with double transmission mechanism, mainly using the concept of simplifying the complex and precise transmission mechanism, so that the previous one needs to be divided into two transmission mechanisms, and the gear ratio of the gear box of each transmission mechanism is different, so that one transmission mechanism can be mainly used for fast driving the mechanical arm body to move vertically, and the other transmission mechanism is mainly used for accurate adjustment, so that the mechanical arm can be accurately moved to the default position. Due to the simplification of the transmission mechanism, the volume of each gear box can be reduced, thereby greatly reducing the overall volume of the mechanical arm.

Hybrid powertrain (10) for starting and propelling a vehicle (8), comprising: a motor (12); a first motor / generator (14); a second motor / generator (16); and a single-stage, widely branched, electrically variable transmission (18) comprising the following: a drive element (52); a stationary element (54); a gear train (44); a torque transmission device (56); a compound planetary gear assembly (20) comprising a ring gear structure (24), a first sun gear element (26-1, 126-1, 226-1, 326-1), a second sun gear element (26-2, 126-2, 226-2, 326-2), a support structure (28), and a double pinion assembly comprising a first pinion gear (30-1, 130-1, 330-1) meshing with the first sun gear element and a second pinion gear (30-2, 130-2, 330-2) meshing with the first pinion gear (30-1, 130-1, 330-1) and the ring gear structure (24); and a highest numerical translation ratio of approximately 4 to 1 and a lowest numerical translation ratio of approximately 0.7 to 1; where: The composite planetary gear arrangement (20) comprises a first node (32-1), a second node (32-2), a third node (32-3) and a fourth node (32-4), wherein the first, second, third and fourth nodes (32-1, 32-2, 32-3, 32-4) have at least a gear ratio of 3 to 1 between the torque transmission device (56) and the output element (52); the second motor / generator (16) is functionally connected via the transmission train (44) to the compound planetary gear assembly (20) at the first node (32-1); the output element (52) is functionally connected to the composite planetary gear assembly (20) at the second node (32-2); the motor (12) is functionally connected to the composite planetary gear assembly (20) at the third node (32-3); the first motor / generator (14) is functionally connected at the fourth node (32-4) to the composite planetary gear assembly (20); The torque transmission device (56) can be engaged to ground the third node (32-3) to the stationary element (54); and each of the first and second motors / generators (14, 16) uses non-rare earth magnets.

One aspect of the invention relates to a method (100) for regulating the engine torque produced by an internal combustion engine of a powertrain provided with a mechanical gearbox, a mechanical clutch and control means, the method (100) being remarkable in that, during the acceleration phase of the powertrain, it comprises the following steps carried out by the control means: • Detecting (101) a desire to shift from a gear ratio N to a higher gear ratio N+n; • Degrading (102) the nominal spark advances of the internal combustion engine so as to reduce the engine torque produced by the internal combustion engine.

The invention relates to a method for performing a downshift in a motor vehicle transmission of a motor vehicle powertrain, wherein, during the downshift, a change from a neutral state of the motor vehicle transmission to a target gear ratio of the motor vehicle transmission is carried out, for which purpose an unsynchronized shift element of the motor vehicle transmission is closed and speed synchronization is performed at the unsynchronized shift element. During the speed synchronization, a transmission input of the motor vehicle transmission is set to a target speed (n). Ziel ) by establishing a torque transmission between the transmission input and a drive motor of the vehicle powertrain via an intermediate disconnect clutch, and by setting the target rotational speed (n) on the part of the drive motor. ZielThe target speed at the gearbox input is specified. Additionally, a target clutch torque (M) is specified for torque transmission in the disconnect clutch. K,soll ) set, whereby the clutch torque (M) K,soll ) depending on a current temperature (T Getr ) of the vehicle transmission is selected.

The invention relates to an electric drive module (1) for a motor vehicle comprising an electric machine (2), a planetary gear set (5) operable via two different gear ratios (3, 4), wherein a sun gear (7) serving as the input (6) of the planetary gear set (5) is connected to a rotor shaft (8) of the electric machine (2) in a torque-transmitting manner, and a switching system (9) for switching between the two gear ratios (3, 4), wherein the switching system (9) is configured such that, to adjust the gear ratio (3, 4), it axially displaces a planet carrier (10) of the planetary gear set (5) between at least two different positions and thereby alters a torque transmission path. The invention also relates to an electric drive train (26) for a motor vehicle, comprising an electric drive module (1) according to one of the preceding claims and a transmission (54) downstream of the drive module (1).

The present invention relates to a drive unit (2) for a vehicle (100) comprising a drive (6) and an output (5). The drive unit (2) includes a transmission assembly (7) with a variator (10) for providing multiple driving ranges, a central shaft (36), and an output shaft (42). Furthermore, the drive unit (2) comprises a gearshift transmission (8) with a forward shift element (46) for mechanically connecting the output shaft (42) to the output (5) with a first gear ratio (48) for forward travel. It also includes a shift device (55) for selectively switching between a second gear ratio (53) for forward travel and a gear ratio (49) for reverse travel. The drive unit (2) also includes a reverse shift element (47) for mechanically connecting the output shaft (42) to the shift device (55).The drive device (2) has a double switching element forming the forward switching element (46) and the reverse switching element (47).

The application relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for transmission speed ratio of an electric truck, which comprises the following steps: 1.1. According to the whole vehicle parameters, performance indexes and working condition load characteristics of the electric truck, the power, torque and rotating speed of the driving motor are matched and parameter configured; 1.2. Based on the whole vehicle energy consumption characteristics and the endurance mileage demand, the energy, capacity and voltage parameters of the power battery are optimized and configured; 1.3. The constraint conditions that the transmission speed ratio needs to meet are analyzed, including the maximum vehicle speed, climbing ability and acceleration performance. The transmission speed ratio of the electric truck is optimized through a multi-objective evolutionary algorithm improved by a deep Q network, the power performance and economic performance indexes can be comprehensively considered, and multi-objective optimization of the transmission speed ratio parameters is realized. Compared with the traditional optimization method, the application can not only effectively balance the power performance indexes such as the acceleration time and the climbing ability, but also significantly reduce the energy consumption per 100 kilometers, and improve the economy of the whole vehicle.

To provide a control system capable of compensating for torque shortage of a generator and stabilizing a system frequency connected to a power generation system even when the system frequency connected to the power generation system decreases, and to provide a power generation system comprising the control system, a control method and a control program.SOLUTION: A control system 200 for a power generation system comprises a generator driven by a gas turbine, and a variable transmission that is installed between the gas turbine and the generator and transmits power to the generator by changing a transmission ratio between a rotational speed of a rotational shaft of the gas turbine and a rotational speed of an input shaft of the generator. The control system comprises a detection unit 210 that detects change in a system frequency connected to the power generation system, a calculation unit 211 that uses the detection result from the detection unit to calculate a transmission ratio command value for controlling the transmission ratio, and a control unit 212 that controls the transmission ratio based on the transmission ratio command value.SELECTED DRAWING: Figure 5

A system for preventing shifting between a plurality of gear ratios in a mechanical gearset. An operating sensor detecting rotation of a moving component in the mechanical gearset, a shift solenoid controlling shifting among the plurality of gear ratios, and a microcontroller communicatively coupled to the shift solenoid and the operating sensor that prevents activation of the shift solenoid when rotation is detected by the rotation sensor.

Bottom bracket housing (1) for a bicycle (4) driven exclusively by muscle power via pedals (2) on a bottom bracket shaft (3), comprising a first housing area (6) for receiving the bottom bracket shaft (3) and a bottom bracket gearbox (5) connected to a drive wheel and a second housing area (7) for receiving a power supply for an electrical switching actuator for realizing different gear ratios in the bottom bracket gearbox (5), characterized in that the power supply comprises at least one energy storage device (8) with charging electronics (9) and a generator (10) for recuperation.

A power transmission method includes providing a first shaft, a second shaft, and a planetary gear assembly between the first shaft and the second shaft. The planetary gear assembly includes at least a first gear ratio and a second gear ratio. A first coupling assembly associated with a first gear ratio and a second coupling assembly associated with a second gear ratio. The systems and methods determine an input speed of a second gear ratio based on a speed of the second shaft and change a speed of the first shaft relative to the input speed of the second gear ratio, wherein the second coupling assembly operates based on the speed of the first shaft relative to the input speed of the second gear ratio.

An electric axle and electric axle product line. The electric axle includes, in one example, a multi-speed gearbox assembly rotationally coupled to a first electric machine and including a first shaft with a first clutch positioned coaxial thereto and a second shaft with a second clutch positioned coaxial thereto. In the multi-speed gearbox assembly, the first clutch and the second clutch are parallel to one another and configured to alter the unit's operating gear ratio.

The application relates to the construction hoisting technical field of floor support plates, and discloses a construction hoisting device for a steel bar truss floor support plate, which comprises a hoisting piece, the hoisting piece comprises four pulling belts fixedly connected at the bottom of a connecting frame, the four pulling belts are in two groups, the ends of the two groups of pulling belts are fixedly connected with contact plates, when a belt one extends outward, the belt one drives a gear one to rotate on the inner wall of a shell, the rotating gear one drives a gear two to rotate in the same direction through a transmission gear, during the outward extension of the belt one, since the gear ratio of the gear one and the gear two is 2:1, that is, when the gear one rotates twice, the gear two rotates once, which makes the L-shaped plates always be located at the center position of the extension part of the belt one when the belt one extends outward, makes the distance between the two L-shaped plates and the edge of the floor support plate be equal, and the distance between the two L-shaped plates and the center of the floor support plate is also equal, and the rapid positioning of the floor support plate is realized.