635results about How to "Improve driving performance" patented technology

The invention provides a torque changer for prolong the service lives of engine and transmitter. The invention comprises an input axle 1, a connector 3, and an output axle 4. The input axle 1 and the output axle 4 are arranged with an input tooth ring 21, an output tooth ring 22, a planet gear 23, a public output planet support 24, a connecting tooth ring 25, a large gear 26, a public planet support 27, a connecting gear 28, and a small gear 29 between them. The input tooth ring 21 is connected to the input axle 1, and connected to the public output planet support 24 and the connecting tooth ring 25 via the planet gear 23. The connecting tooth ring 25 is connected to the output tooth ring 22 and the public output planet support 24 via the planet gear 23. The output tooth ring 22 is connected to the large gear 26. The large gea3 26 is connected to the public planet support 27 and the connecting gear 28 via the planet gear 23. The connecting gear 28 via the planet gear 23 is connected to the public planet support 27 and the small gear 29. The small gear 29 is connected to the external elements. The public planet support 27 is connected to the input tooth ring 21 via the connector 3. The public output planet support 24 is connected to the output axle 4.

The invention provides an intelligent photovoltaic array washing car used for washing photovoltaic arrays of a large-scale ground photovoltaic power station. A washing head supporting and locating unit and a power unit are arranged on the head portion and the tail portion of a crawler base respectively, a water storage unit is arranged adjacent to the power unit, and a washing head unit is provided with range finder sensors used for measuring the distance between the washing head unit and solar cell panels; the washing head supporting and locating unit comprises a movable base capable of rotating and transversely moving and a working arm set provided with a main arm and an end arm, wherein the main arm and the end arm can pitch respectively; a water pump of a water supply unit is driven by a hydraulic motor; a computer is used as a control kernel of a main control module of an operation control unit; a pair of proportional directional valves of the hydraulic control unit controls two base crawler traveling motors, and other directional valves are electromagnetic directional valves controlled by the main control module. According to the intelligent photovoltaic array washing car, the position and the posture of the washing head unit relative to photovoltaic array panels and the position and the posture of a car body relative to the photovoltaic arrays can be automatically controlled, and the intelligent photovoltaic array washing car is intelligent, efficient, flexible in operation, high in adaptability, easy and convenient to operate, concise in structure and good in washing effect.

A cleaning robot includes a non-circular main body, a moving assembly mounted on a bottom surface of the main body to perform forward movement, backward movement and rotation of the main body, a cleaning tool assembly mounted on the bottom surface of the main body to clean a floor, a detector to detect an obstacle around the main body, and a controller to determine whether an obstacle is present in a forward direction of the main body based on a detection signal of the detector, control the rotation of the main body to determine whether the main body rotates by a predetermined angle or more upon determining that the obstacle is present in the forward direction, and determine that the main body is in a stuck state to control the backward movement of the main body if the main body rotates by the predetermined angle or less.

The invention relates to a power system of an oil-electricity four-drive hybrid electric vehicle and a control method thereof. The system takes a motor and a dynamo as impendent power sources for driving front driving wheels and rear driving wheels of a vehicle respectively, adopts a motor controller to control the motor to operate, adopts a dynamo controller to control the dynamo to operate, andadopts a whole vehicle controller to control the dynamo controller and the motor controller to operate; according to equipment parameters and operating parameters of the vehicle, the whole vehicle controller determines a drive mode of the vehicle and the switching among different drive modes; and a control mode comprises a self-check mode, a pure motor drive mode, a pure dynamo drive mode, a motor single drive mode, a dynamo single drive mode, a motor-dynamo double-drive mode and a power failure mode. The power system can farthest exert the advantages of the motor and the dynamo, meets requirements under different conditions, and achieves the aims of reducing operating expense, saving energy and protecting environment.

The invention relates to a method for fulfilling a slope starting assist control function of an electric automobile. The method comprises the following steps of (1), determining an activating condition; entering a to-be-activated state of the function when a driver steps on a brake pedal, the automobile is in a static state, but a hand brake is not pulled upward and the gear of the automobile is a forward gear; and activating the slope starting assist control function if the automobile begins to slide after the driver releases the brake pedal; and (2), correcting the target value of the torque of a driving motor, rapidly increasing the output torque of the motor after the slope starting function is activated so that the automobile does not slide, and keeping the torque output to enable the automobile to be static in situ. When the driver steps down the accelerating pedal, the slope starting assist control function is withdrawn automatically, and the automobile is stably started on a slope. By accurately controlling the torque output of the motor when the automobile is started on the abrupt slope, sliding of the automobile is avoided under the condition that the hand brake is not pulled upwards, the driver can calmly move a foot from the brake pedal to the accelerating pedal, and slope starting is finished.

The invention provides an intelligent vehicle trajectory planning and tracking combined control method. The method comprises the following steps: parameterizing a road; establishing a transverse and longitudinal vehicle dynamic model; expanding a vehicle model, and forming a prediction model through linearization, discretization and incremental conversion; designing an objective function of a trajectory planning and tracking joint control problem according to a model prediction control method; obtaining a current vehicle state, and updating matrix parameters in the prediction model; establishing road boundary, driving stability and state quantity constraints according to the vehicle state and the predicted output state of the previous moment; and converting the problem into a quadratic programming problem form, solving an optimal control increment combination, and acting the optimal front wheel rotation angle [delta]* and the longitudinal control value D* on the autonomous vehicle. According to the invention, the combined processing of optimal driving line planning and control is realized, the complexity of an automatic driving module is reduced, the overall memory occupation and processing time are reduced, and the control stability of the automatic driving racing car is improved.

The invention provides a wheel-tracked freely switching gear train device which comprises a wheel rim deformation system and a track system, wherein the wheel rim deformation system comprises a spindle, a bearing, a wheel rim bracket, a first clutch device, a telescopic mechanism, a wheel rim connector, a first driving gear, a third clutch device and a segmented wheel rim arc, wherein the first clutch device is installed on the spindle to control the wheel rim bracket and is disconnected from or connected with the spindle, the telescopic mechanism is installed on the wheel rim bracket, a first driven gear is installed at one end of the telescopic mechanism, the wheel rim connector is fixedly connected with the other end of the telescopic mechanism, the first driving gear is in sleeved on the spindle in an idle way, the third clutch device is fixedly connected with the first driving gear, one end of the segmented wheel rim arc is connected with the wheel rim bracket, the other end of the segmented wheel rim arc is connected with the wheel rim connector, and the first driven gear is meshed with the first driving gear. The wheel-tracked freely switching gear train device realizes free switching between a round wheel and a track in a vehicle walking device so that a vehicle can switch the round wheel or the track at any time according to different road conditions, thereby enhancing the vehicle driving performance and increasing a vehicle application range.

Disclosed herein are a robot cleaner that has an improved traveling performance, and a method of controlling traveling thereof. The robot cleaner allows driving wheels, which move the robot cleaner, and a brush unit, which sweeps dust on a floor, to be rotated in the same direction.

A drive mechanism and an imaging device according to the present invention each include: an ultrasonic linear actuator 4 provided with a rod 42 that moves reciprocally in response to expansion/contraction of a piezoelectric element 41 and a first group unit 2 serving as an example of a moving body that engages with the rod 42 with a prescribed frictional force. The moving body (first group unit 2) is provided with a holding member 24, a pressing member 30 or other member that engages with the rod 42 in such a way that fluctuation in the frictional force is suppressed, and drive performance is stabilized. As a consequence, the drive mechanism and the imaging device according to the present invention can suppress fluctuation in the frictional force (gripping force) of the moving body in the ultrasonic linear actuator 4, making it possible to stabilize drive performance.

The hybrid vehicle transfers power between the two motors, releases a coupling between one of the motors and the drive shaft, adjusts the rotation speed of one of the motors which is released from the coupling to the drive shaft by the transmission so as to enable drive source element connection, and connects the clutch as well as cranks the engine by either one or the other motor when the engine is started while the clutch is released, the engine is stopped, both the motors are coupled to the drive shaft as well as at least one of the motors is caused to output power.

The invention provides a lane change decision-making method and device for an autonomous vehicle. The method includes the following steps: defining a candidate strategy set for a lane change decisionof the autonomous vehicle; and determining a reward value of each strategy in the candidate strategy set for the lane change decision of the autonomous vehicle by using an evaluation function, and selecting the strategy with the maximum reward value as the lane change decision. The technical scheme provided by the invention mainly improves the decision-making ability of the autonomous vehicle, andespecially has a good decision-making effect for complicated automobile driving scenes.

A vehicular power-transmission control system comprises a continuously variable transmission CVT, which transmits the output of an engine E to wheels, a starting clutch 5, which controls the transmission of power in the continuously variable transmission, an electrical motor generator M, which can assist the engine in rotational drive, and a hydraulic pump P, which is connected to the output shaft of the engine. When the vehicle, which has come into a halt with the engine consequently stopped in an idling elimination control, is to be restarted, the power-transmission control system controls the electrical motor generator to rotate the output shaft of the engine, to which fuel supply is not allowed, thereby to drive the pump. Thereafter, when the starting clutch receiving a hydraulic pressure from the hydraulic pump starts its engagement, the power-transmission control system starts the operation of the engine.

A plurality of thin film transistors provided in a peripheral region are first staggered thin film transistors where a first channel layer configured of low-temperature polysilicon is included, and the first channel layer is not interposed between a first source electrode and a first gate electrode, and between a first drain electrode and the first gate electrode. A plurality of thin film transistors provided in a display region are second staggered thin film transistors where a second channel layer configured of an oxide semiconductor is included, and the second channel layer is not interposed between a second source electrode and a second gate electrode, and between a second drain electrode and the second gate electrode. The first thin film transistor is located below the second thin film transistor.

A pneumatic tire includes a tread portion with an asymmetric pattern including an outboard shoulder main groove, an inboard shoulder main groove, an outboard shoulder portion between the outboard shoulder main groove and an outboard tread edge, a middle portion between the outboard shoulder main groove and the inboard shoulder main groove, and an inboard shoulder portion between the inboard shoulder main groove and an inboard tread edge, wherein the outboard shoulder portion is provided with a three dimensional sipe that has a pair of sipe surfaces extending to a depth direction of the sipe while changing its direction or opening configuration, and the inboard shoulder portion or the middle portion is provided with a two dimensional sipe that has a pair of sipe surfaces extending to a depth direction of the sipe while maintaining its direction and opening configuration.

The invention discloses a central-shaft torque sensing device for an electric bicycle. The central-shaft torque sensing device comprises a central shaft assembled in a five-way tube via a bearing, cranks fixed on the central shaft, a chain wheel sleeved on the central shaft, and an elastic torsion member connected with the central shaft and the chain wheel, wherein left and right torque sensing magnetic steel capable of generating peripheral relative displacement during the torsion of the elastic torsion member are fixed on the elastic torsion member; a magnetic induction coil wrapping the left and right torque sensing magnetic steel is further sleeved outside the elastic torsion member and is electrically connected with a motor control circuit board via a circuit board between the central shaft and the inner wall of the five-way tube; and the motor control circuit board is electrically connected with a motor of the electric bicycle. The device is high in induction sensitivity and accuracy, and capable of accurately detecting torque signals transmitted by the left crank and the right crank in a non-contact manner via a magneto-electricity conversion mode.

The invention discloses an air foam slug flow driving process for the oil recovery of an oil field, comprising the following steps of: 1 determining type and proportion of the used foam liquid, slug volume ratio and on-site injection manner of the used air and the foam liquid during the air foam slug flow driving by an indoor test; and 2 carrying out the air foam liquid slug flow driving on site,wherein the oil flow driving process comprises the following steps of: preparation before the oil flow driving; slugging a pad fluid; slugging the air foam; alternatively injecting the air and foam liquid slug from a specially manufactured device to a target well for many times; and continuously carrying out the oil flow driving on the target well by a water or air injection method according to the dynamic change condition of the target well and a conventional oil displacement method after the injection of the air foam slug is finished. The invention has the advantages of reasonable design, simple and convenient construction steps, good use effect and convenience of realizing, can effectively solve various practical problems of poor water injection effect, difficult improvement on the water injection capability, poor oil flow driving efficiency and the like during the ultralow reservoir waterflooding.

A circumferential sipe extends continuously in the circumferential direction of the tire in the center region of the tread surface section of a rib defined between circumferential grooves. Widthwise sipes are disposed at prescribed intervals in the circumferential direction of the tire in the tread surface section, the widthwise sipes extending in the widthwise direction of the tire in crossing relationship to the circumferential sipe, the widthwise sipes each having opposing terminal ends open to the circumferential grooves. The circumferential sipe changes in depth periodically in such a manner that the circumferential sipe is shallow between adjacent widthwise sipes. The widthwise sipes changes in depth in such a manner that they are greater in depth in the center region and end regions of the tread surface section.

The invention discloses a battery box for a vehicle, a vehicle body component and an automobile. The battery box for the vehicle comprises a first battery accommodation part having a first battery space for accommodating the battery, a second battery accommodation part which is apart from the first battery accommodation part and has a second battery space for accommodating the battery, and a third battery accommodation part which is connected with the first battery accommodation part and the second battery accommodation part, wherein a space between boxes for accommodating feet of a passenger is formed at the two sides of the third battery accommodation part between the first battery accommodation part and the second battery accommodation part; and the third battery accommodation part has a third battery space which is communicated with the first second battery space and the second battery space. The vehicle body component comprises a floor covering member which is provided with an accommodation part for accommodating the battery box for the vehicle, wherein the accommodation part is below the space of the passenger; and a floor beam structure which is fixed on the lower portion of the floor covering member and forms the boundary for accommodating the battery box for the vehicle. Therefore, requirements for relatively high range and safe reliability can be met.

A bogie for a vehicle of a guide rail type which is guided by guide wheels that rotate while keeping contact with a guide rail arranged along a guideway of the vehicle, comprises: a guide frame which includes a pair of transverse beams and a connecting member arranged between the pair of the transverse beams, each of the traverse beams being equipped with the guide wheels rotatably on both ends thereof; an axle which is supported on a non-turning part of the bogie such that the axle is capable of turning; and running wheels which are attached to both ends of the axle, wherein the running wheels are rigidly fixed to the axle and the guide frame is fixed to the axle so as to steer the guide frame, the axle and the running wheels integrally.

The invention discloses a tread rubber composition of an all-steel truck snow tire. The tread rubber composition is characterized by being composed of, by weight, 42-62 parts of natural rubber, 15-35 parts of oil-extended neodymium-based butadiene rubber, 25-34 parts of solution-polymerized styrene-butadiene rubber, 23-38 parts of high-dispersion white carbon black, 30-55 parts of carbon black N220, 2-4 parts of coupling agent liquid Si69, 1-10 parts of aromatic oil, 2-8 parts of zinc oxide, 0.5-3 parts of stearic acid, 2-4 parts of antiager 6PPD, 1.5-3 parts of antiager RD, 2-5 parts of microcrystalline wax, 1-3.5 parts of oil-extended sulfur, 1-2.5 parts of accelerator NS, 0.1-1 part of accelerator DPG and 0.1-0.5 part of scorch retarder CTP. By the adoption of the solution-polymerized styrene-butadiene rubber with the Tg appropriate to that of natural rubber, the neodymium-based rare-earth butadiene rubber with the lower Tg and white carbon black commonly used for semi-steel snow tires, at a specific proportion, the tire is moderate in tread hardness and good in elasticity, and has the advantages of excellent snow slip resistance, good snowfield road holding, high snowfield indexes and the like in a freezing snowfield.

The invention discloses a multi-objective hierarchical collaborative control and optimization method for vehicles with driving intentions. The method comprises the following steps: S1, establishing adriver steering intention recognition model; S2, establishing a nonlinear eight-degree-of-freedom vehicle preview prediction model; S3, establishing a predicted load transfer rate PLTR based on the preview driver model; S4, establishing a multi-objective hierarchical coordinated control system for the whole vehicle; S5, performing multi-objective genetic algorithm optimization with vehicle path tracking and rollover stability as the objective function. The method of the invention is simple, easy to implement and has good application prospects.

The invention provides a four-wheel type indoor mobile robot, and relates to a robot. The four-wheel type indoor mobile robot comprises a chassis, two driving wheels, two universal wheels, a controller and a lithium battery. The two driving wheels are two independent driving wheels adopting a wheel hub type DC brushless motor with a Hall effect sensor to act as a driving motor. The driving wheels and the driving motors are integrated. The controller adopts a full-bridge PWMDC/DC converter working in a bipolar mode to drive the DC brushless motors so that disadvantages in the prior art that DC brush motors are slow in commutation speed and high in noise, and the motors are liable to be damaged when the motors are in a wear and tear state for a long time can be overcome.

An electric vehicle is provided which allows an output torque to be automatically adjusted during travelling even when there is a difference in output characteristic between two traction motor units (6, 6) that independently drive left and right drive wheels (2). The electric vehicle includes the motor units; a torque command unit (23) that outputs torque command values to the motor units; a torque difference occurrence determiner (31) that determines that a difference has occurred between actual driving forces TL, TR of the respective drive wheels (2) even when the torque command unit applies the same torque command values TL*, TR* to the motor units; and a driving force difference reducer (32) that, if the determiner determines that a driving force difference not less than a set value has occurred between the drive wheels, causes control of reducing the driving force difference to be performed during travelling