Byd Company Limited

Huawei Technologies Co., Limited

Dell Products Inc.

Shanghai Construction Group Co., Ltd.

Jian Gong

Xiaohua Tang

Guangming Yang

Nan Liu

Xuguang Zhou

Ming Chang Yu

Yingwu Xu

Kai Liu

Xianhong Jiang

Qiaoqiao Wu

Kalyan Chakravarthy Gunda

Jun Xu

Hongbin Luo

Bo Zhou

Lu Lei

Ao Sun

Ting Luo

Axi Qi

Jiang Cao

Xiaohui Shen

Willa Lang Yuan

Kaiyang Yuan

Yurun Wu

Bo Zu

Xunjin Xu

Xuemei Yuan

Chengwen Wang

Yonghe Xu

Shengyi Wang

Xiaowan Shi

Xiaoxiao Mao

Shu Jiang

Lemonie Mengchi Li

Ming Yu

The technologies described herein are generally directed toward retrieving data from streaming storage. In an embodiment, a method can include receiving an application data request that identifies application data to be retrieved from a sequence of stored data chunks that correspond to a stored stream of data. The method can further include, based on the application data request, estimating a first estimated location of the application data, with the first estimated location including an identified chunk of a sequence of chunks. Further, the method can include, based on the application data request and a characteristic of the identified chunk, retrieving, by the system, a first data block that is estimated to comprise the application data, resulting in a first retrieved data block.

Retrieving data from streaming storage

A time-varying detecting device and method for concrete rheological parameters, in which the double-covered cylinder has top and bottom covers (), both of which can be freely opened, is configured to contain a concrete sample, and a lifting frame includes a pair of vertical supports () extending in parallel with each other. The double-covered cylindrical container is held between the pair of vertical supports () by means of connecting members () in such a manner that it can be flipped 180° about a straight line along which the connecting members () extend under the action of an external force. To perform a test, the top cover () is opened and a concrete mix is filled in, followed by detecting initial rheological parameters. The top cover () is closed, and the concrete mix is left for a predetermined period of time. The double-covered cylindrical container is lifted to a predetermined height by raising the connecting members (), flipped 180° and lowered back onto the floor. The bottom cover () is opened, and the concrete mix is re-mixed and homogenized, followed by finally detecting the time-varying rheological parameters of the concrete mix.

Time-varying detecting device and method for concrete rheological parameters

The present invention provides a blind-mate integrated connector, including: a first installation plate, a mechanical part, and a second installation plate; a first guiding structure and first connection ends of at least two sub-connectors are installed in the mechanical part; the first installation plate is connected to the mechanical part; the second installation plate is disposed with second connection ends matching the first connection ends of the sub-connectors in the mechanical part, and the second installation plate is further disposed with a second guiding structure matching the first guiding structures. By practicing the present invention, multiple sub-connectors may be flexibly integrated without a need to design a dedicated connector mold, thereby achieving cost savings and shortening a development cycle.

Blind-mate integrated connector

A clutchless transmission apparatus and control method thereof. The transmission apparatus comprises a motor () and a transmission (), said motor () is connected to said transmission () and supplies power to said transmission () via an input shaft of the transmission (), wherein said apparatus further comprises a control device (), which is electrically connected to said motor () and said transmission (), wherein said control device () is configured to determine whether a gear-position shifting is required based on rotation speed of said transmission (), if a gear-position shifting is required, regulates torque of said motor () to control said transmission () to disengage, and then regulates the rotation speed of said motor () based on the rotation speed of said transmission () to control said transmission () to engage for shifting gear-position. The clutchless transmission apparatus provided in the present invention doesn't need a clutch during gear-position shifting, and therefore it is light, simple, easy to maintain and control, and can be used in a wide range of application.

Clutchless transmission apparatus for controlling gear-position shifting and control method thereof

The present invention discloses a method and apparatus for controlling a motor for an electric vehicle. The method and apparatus calculates the current acceleration &#x3b1; of the motor according to the detected rotor position values in real-time, and if the current acceleration &#x3b1; is greater than a predetermined forward acceleration &#x3b1;0, the output torque of the motor is decreased. If the acceleration &#x3b1; is less than a predetermined backward acceleration &#x3b1;1, then the output torque of the motor is decreased. Thus, when the vehicle travels from a normal road surface to a smooth road surface, the decrease or increase output torque may suppress the abrupt speed variations.

Method and apparatus for controlling motor for skid mode of electric vehicle

A method and an apparatus for controlling output torque of a motor for an electric vehicle in downhill mode comprises following steps: detecting a tilt angle value &#x3b8;, a current vehicle speed value V and an accelerator-pedal travel value Gain of the vehicle, determining whether the vehicle is in downhill mode or not, and if the result is positive, then calculating a downhill slip torque Tof the vehicle under the tilt angle value &#x3b8;, obtaining a maximum output torque T, calculating an output torque T of the motor based on T, T, Gain and a given vehicle speed delimitative value V, and controlling the motor to output the calculated output torque T. The present invention ensures the vehicle speed not too high by controlling the output torque of an electric vehicle in downhill mode, even if the brake-pedal travel is zero.

Method and apparatus for controlling output torque of a motor for an electric vehicle in downhill mode

The present invention provides an apparatus and method for controlling an accelerator for electric vehicles. The method comprises steps of: acquiring an actual accelerator pedal depth value and a current vehicle speed; determining a maximum output torque of motor under the current vehicle speed based on the current vehicle speed; and controlling the output torque of motor in such a way that the growth rate of the output torque higher than that of the actual accelerator pedal depth value at the beginning and then closed to that of the actual accelerator pedal depth value during the actual accelerator pedal depth value growing. The invention makes the output torque grown rapidly within the shallow range of accelerator pedal depth, while makes the output torque grown closed to that of the accelerator pedal depth within the relative deep range of accelerator pedal depth. Thus during the initial stage of acceleration, the vehicle may rapidly output a bigger torque, with an excellent dynamic response, to improve the driving comfort.

Apparatus and method for controlling an accelerator for electric vehicles

A control method of the electromotor comprises: setting a target alternating axis current based on the rotor angular velocity of the electromotor and a target direct axis current based on the torque of the motor; simultaneously detecting three-phase currents and current rotor position angle of the electromotor; converting the three-phase currents to an actual alternating axis current and an actual direct axis current by Park and Clark conversions; inputting the difference between the target current and the actual current to a current loop, outputting the required direct axis current and the required alternating axis current; determining the three phase voltages according to the required direct axis current and alternating axis current and the angle of the electromotor rotor position; obtaining PWM control waveform through three-phase voltages, wherein said PWM control waveform is configured to control the conversion from direct current to alternating current and drives the electromotor.

Control method of electromotor

The present invention provides a clutch engaging control method in a hybrid power output device, wherein the device comprises an engine, a first motor, a clutch and a second motor that are connected in sequence, a battery, and a speed reducing mechanism and a drive shaft that are connected to the output end of the second motor; the method comprises: (a) detecting the rotation speed &#x3c9;of the second motor and setting the rotation speed &#x3c9;as the target rotation speed &#x3c9;of the first motor, when the vehicle is driven by the second motor and the engine is required to be started to provide assistance to the second motor; (b) starting the first motor to drive the engine, and controlling the actual rotation speed &#x3c9;of the first motor to be close to the target rotation speed &#x3c9;; (c) switching the state of the first motor from a driving motor to a power generator when the actual rotation speed &#x3c9;of the first motor is approximately equal to the target rotation speed &#x3c9;; and (d) engaging the clutch. The method can improve the dynamic response time of the engine and suppress impact in the clutch engaging process. The present invention further provides a clutch engaging control system in a hybrid power output device.

Clutch engaging control method and control system in hybrid power output device

An apparatus and method for controlling energy feedback for electric vehicles includes acquiring an accelerator-pedal travel value, a brake-pedal travel value and a current vehicle speed value, and determining whether the brake-pedal travel value is equal to 0%. Feedback torque based on the current vehicle speed value and the brake-pedal travel value with various conditions is then calculated. Mechanical energy generated by the feedback torque T is converted into electric energy and transmitted to battery of the electric vehicle for storing. Accordingly, the endurance mileage of electric vehicle may be effectively prolonged and the utilization efficiency of battery is improved.

Apparatus and method for controlling energy feedback for electric vehicle

This invention provides methods for electric vehicle motor control and rotor position detection and fault-tolerant processing. The rotor position signal sampled by the system is compared with the previous rotor position &#x3b8;. When there is a sudden change, the current position signal acquired is discarded. Instead, a fault-tolerant processing strategy for use during an error condition is employed where the previous sampled rotor position &#x3b8;is used as a base to determine the corrected current rotor position angle &#x398;'. Then the correcting value is used to control the electric motor. Thus, during the motor operation, when the detection of the motor rotor position is erroneous because of a sensor such as a revolver that may be interfered by external conditions such as electromagnetic fields or vibrations or when there is a breakdown in other related hardware components or transmitting circuits, the fault-tolerant processing methods of this invention can effectively prevent the motor from losing control and allow it to maintain its continuity and stability.

Methods for electric vehicle motor control and rotor position detection fault-tolerant processing

Growing community of inventors

Shanghai, China

Jian Gong