1118results about How to "Improve driving stability" patented technology

A method of improving the stability of organic light emitting diode (OLED) display devices driven by amorphous silicon thin-film transistors, in which the driving circuitry within each sub-pixel includes a driving transistor for driving organic light emitting diode (OLED), a scanning transistor and a storage capacitance. An end of the capacitance is connected to the signal resetting line, which a resetting time pulse of high potential and low potential are supplied. Since the resetting signals within the sub-pixels are synchronized, a single voltage of the resetting signal can control the positive and negative stresses for each transistor in the sub-pixels on the panel.

Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, fully secured of driving stability, and simply constructed. The EL device has a light-emitting layer disposed between an anode and a cathode stacked one upon another on a substrate and the light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. Examples of the indolocarbazole compounds include a compound represented by the following formula (2) or (3), wherein X is N or CH, at least one of Xs is N, and Ar1 to Ar3 each is a substituted or unsubstituted aromatic group.

An organic electroluminescent device includes an anode electrode layer, a cathode electrode layer opposed to the anode electrode layer, and a luminous layer containing an organic compound disposed between the anode electrode layer and the cathode electrode layer. An excitation state of the organic compound in the luminous layer is created upon a hole injection from the anode electrode layer, and an electron injection from the cathode electrode layer, thereby causing light emission in the organic electroluminescent device. An electron-accepting material is provided in at least one hole transportation layer capable of transporting holes injected from the anode electrode layer disposed between the anode electrode layer and the cathode electrode layer, and the electron-accepting material is positioned at a site which is not adjacent to the anode electrode layer.

The invention relates to a four-wheel independently driven electric vehicle torque distribution control method and a four-wheel independently driven electric vehicle torque distribution control system. The method comprises the following steps of (1) acquiring a driver operation action signal and vehicle driving parameters in real time, and after pre-processing the acquired data, storing the data; (2) according to the data acquired in the step (1), identifying the current driving intention of a driver; (3) according to the driving intention identifying result, adopting a corresponding control policy to control, and according to the control policy, sending a torque control order to each driving motor. The system comprises a data acquiring module, a driving intention identifying module and a torque distribution control module which are sequentially connected. Compared with the prior art, torque can be reasonably distributed to four wheels according to the driving intentions of the driver, such as ordinary acceleration, fast acceleration and turning driving, the energy utilization of the finished vehicle is improved, meanwhile, the driving stability of the vehicle under a limited condition can also be improved, and the advantage of independent driving is fully played.

Provided is a field effect transistor, provided with a gate electrode 15, a source electrode 13, and a drain electrode 14 formed on a substrate, including a channel layer 11 formed of an oxide containing In, Zn, or Sn as the main component, and a gate insulating layer 12 provided between the channel layer 11 and the gate electrode 15, in which the gate insulating layer 12 is formed of an amorphous oxide containing Ga as the main component.

Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure and also disclosed is a compound for organic EL device useful for the said device. The compound for organic EL device is, for example, an indolocarbazole derivative represented by the following general formula (3). The organic EL device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises a phosphorescent dopant and the aforementioned indolocarbazole derivative as a host material. In general formula (3), L is an aromatic heterocyclic group of a fused-ring structure with a valence of (n+1), Ar1 to Ar3 each is an alkyl group, an aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon or aromatic heterocyclic group, and n is an integer of 0-5.

Disclosed is an organic electroluminescent device (organic EL device) which can achieve high efficiency and long lifetime even when driven at low voltage. The organic El device comprises at least a light-emitting layer and an electron-transporting layer between an anode and a cathode facing each other. The electron-transporting layer consists of two layers, namely, a first electron-transporting layer and a second electron-transporting layer and the first electron-transporting layer and the second electron-transporting layer are arranged sequentially in this order from the light-emitting layer side to the cathode side. The first electron-transporting layer contains an indole derivative in which the ring nitrogen atom is substituted with an aromatic group and an aromatic ring is fused to the indole ring.

The invention relates to a motor coach unitary body of a large rectangular pipe under frame, which comprises the under frame, an upper part body frame connected with the under frame and a coping, and a floor bracket arranged on the under frame; wherein, the under frame consists of a front overhang, a front axle, a front wheel casing, a middle section, a rear axle, a rear wheel casing and a rear overhang which are sequentially connected with each other; the upper part body frame comprises a front and a rear circles as well as a left side and a right side circles; the under frame is connected with the front and the rear circles as well as the left side and the right side circles of bodywork and the coping by connecting points to form a whole carrying framework, so that a plurality of closed stress ring structures are formed. The invention has the characteristics of strong collision-resistant and side rollover resistant capability, low cost, light weight, high adaptability, good safety, etc.

In a vehicle dynamics control apparatus capable of balancing a vehicle dynamics stability control system and a lane deviation prevention control system, a cooperative control section is provided to make a cooperative control between lane deviation prevention control (LDP) and vehicle dynamics stability control (VDC). When a direction of yawing motion created by LDP control is opposite to a direction of yawing motion created by VDC control, the cooperative control section puts a higher priority on VDC control rather than LDP control. Conversely when the direction of yawing motion created by LDP control is identical to the direction of yawing motion created by VDC control, a higher one of the LDP desired yaw moment and the VDC desired yaw moment is selected as a final desired yaw moment, to prevent over-control, while keeping the effects obtained by both of VDC control and LDP control.

The invention provides a method for controlling the electric automobile stability direct yawing moment based on a high-order slip mold and relates to the field of control over electric automobile stability. The method includes the steps that the rotation angle of a steering wheel and the longitudinal automobile speed are detected through a signal acquisition and conditioning circuit, so that the ideal yawing angular speed value is obtained; according to the detected yawing accelerated speed at the current moment of an automobile and the actual yawing angular speed, the side slip angle estimated value is obtained through a robust slip mold observer based on active control and self-adaptive estimation; two parameters of the difference of the yawing angular speed and the ideal yawing angular speed and the actual slide slip angle of the automobile serve as input variables, a high-order slip mold control strategy is adopted, and the direct yawing moment meeting the requirement for automobile stability is obtained; and finally, the automobile stability margin serves as an objective function and a constraint condition, and a support vector machine algorithm is used for distributing drive force or brake force. By the adoption of the method, the finite time constriction of an automobile stability direct yawing moment control system is achieved, and the travel stability of the automobile under the limit conditions of the high speed, the severe road and the like is improved.

In an OLED device, the improvement including a reflective and conductive bilayer anode including a metal or metal alloy or both; a hole-injecting structure over the reflective and conductive bilayer anode; at least one organic layer formed over the hole-injecting structure; and the reflective and conductive bilayer anode being configured to improve the stability of drive voltage.

A nozzle-typed drag-reducing structure for vehicle is arranged at the tail end of a vehicle, including a frame body comprised of a combination of a plurality of deflectors, between two of which an airflow channel is formed; and an air inlet and an air outlet respectively formed at two sides of the frame body, and the area comprised by surrounding the air outlet is larger than the area comprised by surrounding the air inlet. Thereby, whenever the vehicle is driven in high speed or low speed, it is all possible to boost the running efficiency and increase the driving stability.

The invention discloses a vector distribution control method for torque of a distributed-driven electric automobile. Through the relation between vehicle driving state stability and the expected yaw velocity under a vehicle dynamical model, an ideal motion state of a vehicle under generalized additional yawing moment is worked out, and control stability of a system is judged and analyzed through the expected yaw velocity so as to determine whether yawing moment control is required or not; a tyre longitudinal slip rate is set as a specific value in a stable state, and driving torque is precisely distributed under the condition that a coefficient of road adhesion is met. Through reasonable distribution of driving or braking torque of front and back axles, the response speed to the expected yaw velocity can be remarkably increased, so that the vehicle has an ideal motion state when passing a curve, the problem of difficult steering of the vehicle when acceleration is not enough is effectively restrained, curve passing efficiency is improved, vehicle driving stability and smoothness are improved, control burden of the driver is remarkably reduced, and driving safety is improved.

Device and method for determining a wheel braking pressure and / or an admission pressure in a braking system in which pressure medium is introduced from a reservoir for the pressure medium having an admission pressure into a wheel brake through at least one shutoff device for inlet and / or outlet and / or passage of a pressure medium, it being possible to remove pressure medium from the wheel brake through at least one means delivering the pressure medium. In so doing, a pressure quantity representing the admission pressure is estimated, at least one operating state of at least one actuator in the braking system is detected and the wheel braking pressure is estimated as a function of the estimated admission pressure and the detected operating states.

The contact patch of the center land portion partitioned by the center side main grooves (22A)protrudes outward in the tire radial direction from the overall standard profile line R of the tread portion. The maximum protruding amount PA is not less than 1.0% and not more than 2.5% of the tire width direction dimension of the center land portion. The contact patch of the intermediate land portion partitioned by the center side main groove and the shoulder side main groove protrudes outward in the tire radial direction from the standard profile line. The maximum protruding amount is not less than 0.7% and not more than 2.0% of the tire width direction dimension of the intermediate land portion. The maximum protruding amount of the center land portion is greater than the maximum protruding amount of the intermediate land portion.

The invention relates to a orchard-used self-propelled independent steering and four-wheel driving power-driven orchard work vehicle comprising a frame structure, an single-wheel independent driving and independent steering mechanism, an overall steering and overall walking mechanism, a corner signal and revolving speed signal sensor and a central control unit and s storage battery. The frame structure is used for supporting other mechanical mechanisms and providing a chassis platform. The single-wheel independent driving and independent steering mechanism is provided with a direct current motor, a reducer and a direct current motor driver which are used for outputting corresponding revolving speed and torque needed in walking and controlling sense of rotation of car wheels, and is provided with a stepping motor, a stepping motor driver and a reducer which are used for steering independently. The overall steering and overall walking mechanism comprises four single wheel independent driving and independent steering structures same in structure. The corner signal and revolving speed signal sensor transmits signals to data acquisition cards to process and transmits back to computers to finish information feedback. The central control unit is used for controlling driving modes of each wheel. The storage battery is used for supplying power to all electric power mechanisms, driving mechanisms and control systems. The orchard-used self-propelled independent steering and four-wheel driving power-driven orchard work vehicle can realize overall movement by various driving modes and strong in topography adaptability.

The invention discloses an intelligent anti-rollover control system for an oil tank truck and a use method. The intelligent anti-rollover control system comprises a truck frame, a tank body, multi-dimensional pneumatic pressing plate adjusting devices, a combined pressing plate, annular gravity center adjusting devices, six-dimensional posture adjusting bionic wheel legs, a central control unit, a tank body gravity center controller and tank truck sensors. The use method is mainly characterized as follows: the central processing unit performs coordination control on the tank body gravity center controller and a wheel leg posture adjusting controller; the tank body gravity center controller performs coordination control on a pressing plate adjusting controller, a pressing plate controller and an annular gravity center adjusting controller; the wheel leg posture adjusting controller performs six-dimensional posture adjusting on the six-dimensional posture adjusting bionic wheel legs. The intelligent anti-rollover control system can realize real-time online monitoring and control of the gravity center of a chassis of the oil tank truck and the gravity center of the tank body of the oil tank truck, prevent rollover when the oil tank truck is disturbed by the bad road surface and the outside in a high-speed running state and remarkably improve the running stability, safety and the anti-rollover capacity of the oil tank truck.

The invention provides a method and device for anti-slip control over a four-wheel drive hybrid power system. The method for anti-slip control comprises the steps of respectively calculating a front axle slip error coefficient and a rear axle slip error coefficient; according to a current torque request of a driver, the front axle slip error coefficient and the rear axle slip error coefficient, obtaining a front axle torque distribution coefficient and a rear axle torque distribution coefficient; according to the front axle torque distribution coefficient and the rear axle torque distribution coefficient, adjusting front axle torque and rear axle torque which are preliminarily distributed by a vehicle control unit, and obtaining pre-distributed front axle torque and rear axle torque; respectively performing torque limitation on the pre-distributed front axle torque and rear axle torque, and obtaining anti-slip front axle torque and rear axle torque. The method and the device have the advantages that when a vehicle slips, the anti-slip front axle torque and the rear axle torque can be distributed intelligently, an optimal vehicle road adhesive force and an optimal off-the-hook capability are achieved, and driving stability and passing capability of the vehicle are effectively improved.

The invention discloses a dual-motor redundant steer-by-wire device and a control method thereof. The device comprises an electric control unit (ECU), a torque sensor, a motor, a steering gear rack, asteering gear pinion and a steer-by-wire mechanism. The electric control unit (ECU) of the device judges the steering intention of a driver by collecting steering wheel turning angle signals; when the steer-by-wire mechanism works normally, an electromagnetic clutch is disengaged, the motor plays a part in providing road feel, and a roller screw steering mechanism completes a steering instruction; when the steer-by-wire mechanism breaks down, the electromagnetic clutch is engaged, the motor rotates reversely, and the steering gear pinion and the steering gear rack complete the steering instruction and play a part in providing steering assistance. The device is simple in structure, high in precision and reliable in work, by means of the roller screw steering mechanism, steering displacement can be precisely controlled, and meanwhile, the device can automatically return to a mechanical steering state when the steer-by-wire mechanism fails to complete the steering instruction.

In an outboard motor control system having two outboard motors each mounted on a stern of a boat, there is provided a controller that controls operation of steering actuators to regulate steering angles of the outboard motors such that lines extending from axes of rotation of the propellers of the outboard motors intersect at a desired point. With this, it becomes possible to freely adjust the stream confluence point of the outboard motors, thereby improving boat driving stability and providing enhanced auto-spanker performance.

The invention provides a telescopic device which comprises a first telescoping mechanism, a second telescoping mechanism, a horizontal telescoping mechanism, a mounting seat, a first mounting board and a second mounting board, wherein a first end of the first telescoping mechanism and a first end of the second telescoping mechanism are hinged with the mounting seat respectively; a second end of the first telescoping mechanism and a second end of the second telescoping mechanism are hinged with the first mounting board and the second mounting board respectively; and a first end and a second end of the horizontal telescoping mechanism are hinged with the first mounting board and the second mounting board respectively. The invention further provides a vehicle provided with the telescopic device. With the adoption of the telescopic device and the vehicle, the wheelbase and the tread of the vehicle can be adjusted respectively or simultaneously.

Provided is a display panel to which a dual gate transistor is applied. The display panel includes a substrate including a pixel area and a non-pixel area and a dual gate transistor disposed on the non-pixel area. The dual gate transistor includes first and second transistors which are connected in series and an auxiliary electrode which connects two gate electrodes of the first and second transistors. The auxiliary electrode is on a layer which is different from the gate electrode. Therefore, an area in which the dual gate transistor is formed is reduced and stability of the driving circuit is secured.

Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, fully secured of driving stability, and simply constructed. The EL device has a light-emitting layer disposed between an anode and a cathode stacked one upon another on a substrate and the light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. Examples of the indolocarbazole compounds include a compound represented by the following formula (2) or (3), wherein X is N or CH, at least one of Xs is N, and Ar1 to Ar3 each is a substituted or unsubstituted aromatic group.

A pneumatic tire including five land portions Q1, Q2, Q3, Q4, Q5 in a tread surface 1 by providing four main grooves G1, G2, G3, and G4 in a ground contact region R of the tread surface 1, wherein positions and groove widths of the main grooves G1, G2, G3, and G4 are specified together with only the land portion Q1 positioned outermost on a vehicle outer side when mounted on a vehicle being formed into a block row, and the other land portions Q2, Q3, Q4, and Q5 being formed into ribs, and a groove area proportion of the tread surface 1 is larger on a vehicle inner side than the vehicle outer side with a tire equator CL and center lines of the land portions Q2, Q3, Q4 as boundaries.

The invention relates to a method for improving the driving stability of a motor vehicle in which driver-independent braking interventions are triggered if a critical driving situation is to be expected on the basis of route information and instantaneous position data of the motor vehicle, and to a corresponding system. According to the invention, the driver predefines, via a human / machine interface, information about the maximum coefficient of friction to be utilized, which is used as the basis for the prediction of a critical driving situation.

A subframe structure for an automotive vehicle wherein a subframe is attached through a rubber mount to a vehicle body, suspension components are assembled onto the subframe so that the suspension components are held connected to the vehicle body through the subframe, and a detecting assembly capable of providing an output signal according to a load that acts between a subframe and a vehicle body is provided. A rubber mount for use in this subframe structure is also disclosed.

The invention discloses a fabricated prestressed heat-resistant cement concrete pavement and a construction process thereof. The pavement is formed by splicing a plurality of fabricated prestressed heat-resistant pavement plates which are parallelly paved and connected into a whole through transverse prestressed steel stranded wires, wherein each fabricated prestressed heat-resistant pavement plate comprises a fabricated prestressed pavement plate which consists of a plurality of pavement plate blocks connected through connecting plates, and a vermiculite concrete heat-resistant paving layer which is paved on the fabricated prestressed pavement plate; each pavement plate block comprises a plurality of common plates which are connected into a whole through longitudinal prestressed steel stranded wires; and the connecting plates and the common plates are cement concrete prefabricated plate blocks. The construction process comprises the following steps of: 1, prefabricating the cement concrete prefabricated plate blocks; 2, transporting the cement concrete prefabricated plate blocks; and 3, paving the pavement. The pavement is reasonable in structural design, convenient to construct, low in input cost and short in construction period, and has heat resistance, construction quality is easy to ensure, and various practical problems of the traditional fabricated cement concrete pavement can be solved.

The invention discloses a distributed driving electric automobile torque vector control method based on double-layer control. The control method comprises the following steps: establishing a vehicle dynamic model, and calculating a tire slip rate by utilizing a Dugoff tire model; establishing a torque distribution controller based on the vehicle dynamic model and the Dugoff tire model, wherein thetorque distribution controller comprises an upper controller and a lower controller; calculating the current drive torque of each driving wheel of the vehicle by the upper controller according to body yawing angular velocity; calculating a compensating torque needed for remaining an ideal slip rate of each driving wheel by the lower controller according to the ideal slip rate of each driving wheel serving as a control objective, and further performing compensation distribution on the driving torque, so that an actual torque is output to the driving wheel, and torque vector control is completed. According to the control method disclosed by the invention, the automobile torque can be effectively subjected to vector distribution, the vehicle driving stability and smoothness are improved, theoperating burden of the driver is obviously decreased, and the driving safety is improved.

A suspension system for an agricultural or construction industry vehicle is described. The suspension system comprises two hydraulic cylinders, which support a frame in relation to an axle of the vehicle, the hydraulic cylinders each having a piston-side chamber and a piston rod-side chamber and each of the chambers of the hydraulic cylinders being connectable to one another via connecting lines provided with a switch valve, a first supply line, which can be connected via a switch valve to the piston-side connecting line of the first hydraulic cylinder, a second supply line, which can be connected via a switch valve to the piston-side connecting line of the second hydraulic cylinder, a hydraulic accumulator, in each case connectable to the supply lines via proportionally adjustable orifices, a hydraulic source, a hydraulic tank, a control valve device, and an electronic control unit. In order to prevent the activation of a suspension state in critical vehicle states, means for the detection and compensation of load states of the vehicle are provided in the suspension system.