Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

73 results about "Shift schedule" patented technology

Gear shifting method using economy shift schedule of blade electric vehicle

The invention relates to a gear shifting method using economy shift schedule of a blade electric vehicle. According to the method, firstly the optimal economy shift schedule curve is made, and driving characteristic curves and efficiency relational graphs of a motor in 1 gear and 2 gear are made in the same graph; a horizontal line of constant driving force torque T0 is made in an overlapped area of the efficiency graphs in the 1 gear and the 2 gear; efficiency value curves, corresponding to different vehicle speeds in the 1 gear and the 2 gear, of traction T0 are made in a graph, and the intersection of the two curves is an ideal gear shifting point; opening degree values of an accelerator of upshift points and downshift points of the 1 gear and the 2 gear are calculated; the obtained upshift points and the downshift points are linked, so the optimal economy shift schedule can be obtained. Then the shift schedule curve is written in a TCU gear shifting control program. A TCU of the electric vehicle receives an accelerator opening degree signal and a vehicle speed signal of a driver in gear shifting, after judgment, when an ideal gear shifting point reaches, the TCU controls a gearbox gear shifting actuator, and thus gear-shifting motion is achieved.
Owner:BEIJING ELECTRIC VEHICLE

Method of transitioning among shift schedules

A hybrid electric vehicle having a discrete ratio transmission shifts according to distinct shift schedules in various operating modes. For example, different shift schedules may be used for operating with the engine off, operating with the engine running, and regenerative braking. When the vehicle transitions from one mode to another, the new shift schedule may schedule a shift that the driver would not expect. To avoid annoying the driver, a control strategy inhibits the shift until either the old strategy would also schedule a shift or a customer event occurs.
Owner:FORD GLOBAL TECH LLC

System For Selecting A Transmission Economy-Based Shift Schedule

The present invention provides a method of selecting an economy mode shift schedule for a transmission coupled to a motor vehicle. The method includes calculating vehicle acceleration and determining a change in accelerator pedal position. Also, a net tractive effort force of the vehicle is determined for a current gear range of the transmission. Also, the method includes comparing the net tractive effort force for the current gear range to a maximum tractive effort force for a desired gear range and selecting the economy mode shift schedule for the transmission based on the comparison. The method further includes controlling shifting between one or more gear ranges of the transmission according to the economy mode shift schedule.
Owner:ALLISON TRANSMISSION INC

Method for optimizing gear-shift schedule of vehicle based on dynamic programming algorithm

The invention discloses a method for optimizing the gear-shift schedule of a vehicle based on a dynamic programming algorithm, and belongs to the technical field of automotive automatic transmissions.In order to optimize the vehicle gear-shift decision that satisfies fuel economy without losing dynamic property, the invention aims to propose a method for optimizing the gear-shift schedule of a vehicle based on a dynamic programming algorithm. The method of the invention includes the steps of establishing an engine fuel consumption characteristic map according to the measured data of an engine; importing a gear optimal sequence of various cyclic working conditions solved in the first step into an AMEsim vehicle simulation model that has been built; printing the corresponding throttle opening and vehicle speed obtained in the second step and the gear data solved in the first step under the three cyclic working conditions into the same figure by using the MATLAB; building a gear-shift logic control module on an MATLAB/SIMLINK platform; formulating an economy based gear-shift schedule and a dynamic property based gear-shift schedule respectively according to the same vehicle parameters in Table 1 in the second step; and finally, performing optimization to obtain a gear-shift schedule curve that satisfies both the dynamic property and the fuel economy. The invention has the characteristics of simple structure, easy implementation, and strong practicability.
Owner:CHANGCHUN UNIV OF TECH

Modeling method for gear-shift schedule of automatic transmission

The invention discloses a modeling method for the gear-shift schedule of an automatic transmission. The modeling method not only can be used for theoretical research to the automatic transmission, but also is more suitable for practical modeling for the gear-shift schedule of the automatic transmission. The modeling method comprises the following steps: 1, acquiring vehicle parameter variable data having influence on gears, and acquiring the opening degree of a throttle valve, the vehicle speed and the corresponding gear information of a vehicle under different driving operations; 2, carrying out data processing on parameter variable: classifying the acquired variable data, making a scatter diagram and eventually extracting boundary variable data points of all gears from the scatter diagram; 3, making a gear shift chart: sequentially making the gear shift chart and a gear-shift schedule MAP for gears relating to the opening degree of the throttle valve and the vehicle speed; 4, building a gear-shift schedule model: building the gear-shift schedule model and applying to the gear-shift schedule MAP. The modeling method provided by the invention solves the problems of complexity, poor real-time performance and speedability in the conventional modeling method for the gear-shift schedule.
Owner:JILIN UNIV

Gear-shifting schedule curve measuring method and corresponding gear-shifting control method for off-road vehicles

The invention relates to a gear-shifting schedule curve measuring method and a corresponding gear-shifting control method for off-road vehicles, and belongs to the technical field of automatic variable speed control of the off-road vehicles. According to the methods, a gear-shifting schedule curve equation of an AMT (automated mechanical transmission) of an off-road vehicle is calculated firstly; a corresponding gear-shifting schedule curve is drawn; the current practical vehicle speed, the slip ratio and the throttle opening degree are collected, and corresponding target gears are determined; control signals for electromagnetic valves of actuating mechanisms are output through an logical operation; therefore, the electromagnetic valves of the actuating mechanisms are enabled to perform corresponding actions, and the automatic gear shifting is achieved. The gear-shifting schedule curve measuring method and the corresponding gear-shifting control method can guarantee the tractive efficiency and the fuel oil economic efficiency of the AMT of the off-road vehicles, reduces the work intensity of a driver, and enables the vehicles to travel more smoothly; meanwhile the gear-shifting actuating mechanisms are improved, a gear selecting process is omitted, the gear-shifting time is reduced and the gear-shifting efficiency is improved due to the direct gear shifting; and the methods can be used for AMT of off-road engineering vehicles, agricultural vehicles and military motor vehicles.
Owner:HENAN UNIV OF SCI & TECH

System and method for controlling a transmission

A system for selecting shift schedules of a transmission of a vehicle includes a controller configured to receive a signal indicative of acceleration of the vehicle prior to a change of a gear of the transmission. The controller is further configured to estimate tractive effort of the vehicle following the change of the gear of the transmission, the tractive effort estimation being based on at least an estimation of a road load on the vehicle. The controller is further configured to select between a first shift schedule and a second shift schedule based on the tractive effort estimation, wherein, if the tractive effort estimation is less than a threshold value, the controller selects the first shift schedule, and if the tractive effort estimation is at least equal to the threshold value, the controller selects the second shift schedule.
Owner:CATERPILLAR INC

Acceleration based mode switch

The present invention provides a method of selecting and implementing a shift schedule for a transmission in a vehicle that includes an output speed sensor and a controller. The method includes measuring output speed with the output speed sensor and comparing the measured output speed to an output speed threshold. The controller receives throttle percentage and compares the throttle percentage to a throttle threshold. The method also includes calculating output acceleration and transmission gear ratio with the controller. The shift schedule is selected based on the measured output speed, calculated output acceleration, calculated transmission gear ratio, and throttle percentage.
Owner:ALLISON TRANSMISSION INC

Smart, web-based time management software

A novel software method of creating and maintaining a schedule of the activities to be performed by agents on behalf of a principal entity at least includes: a) creating a principal profile; b) identifying the principal's agents; c) defining jobs to be performed by the principal's agents, the jobs being at least partially defined by identifiable skills needed to perform the jobs; d) defining a scheduling period; e) defining job shifts related to the temporal performance of the jobs during a scheduling period; f) defining job criteria for matching particular agents to particular jobs; g) identifying the availability of the principal's agents for job shift performance; h) generating a job shift schedule based on elements b)-g); i) automatically modifying the job shift schedule according to predefined rules and interpreted rules postulated by software according to previous scheduling and scheduling approval iterations; j) determining a fitness value of a generated or modified schedule, based on adherence to predefined or interpreted rules; k) repeating elements i) and j) until no improvement in the fitness value is realized; l) via a principal's manager-agent, approving a job shift schedule; and m) publishing an approved job shift schedule for availability to the principal's agents and manager-agents. The method is hosted via the Internet, using an application service provider model.
Owner:HIGH ALTITUDE SOFTWARE

Driving intention identifying method suitable for multi-performance comprehensive optimization of gear shift schedule

The invention discloses a driving intention identifying method suitable for multi-performance comprehensive optimization of a gear shift schedule, and belongs to the technical field of step type automatic transmissions of cars. The driving intention identifying method comprises the following steps of: adopting a dynamic property and economical efficiency expectation fuzzy inferer to perform quantization on dynamic property and economical efficiency expectation of a driver separately, and determining emission performance expectation on this basis; respectively determining input parameters and output parameters of the fuzzy inferer according to the construction of the dynamic property and economical efficiency expectation fuzzy inferer, and determining subordinate functions of the input parameters and the output parameters; and finally, establishing a dynamic property and economical efficiency fuzzy inference rule base, and taking each performance expectation quantized value as a weighting coefficient to construct a gear shift performance comprehensive evaluative function which is used as a gear shift rule multi-performance index comprehensive optimization target function. On the basis of reflecting the driving intention of the driver, the driving intention identifying method enables dynamic property, economical efficiency and emission comprehensive performance of a whole vehicle to be optimal, and also enables automatic gear shift to be more personalized, so that the defect of simply sorting driving intentions in the prior art is made up.
Owner:XIHUA UNIV

Intelligent production scheduling method and device and computer storage medium

The invention discloses an intelligent scheduling method and device and a computer storage medium, and the method comprises the following steps: executing polling calculation based on a preset condition, carrying out the scheduling of a locking order, and generating a locking order scheduling result; after scheduling of the locking order is completed, updating residual theoretical capacities of all production lines; constructing a mathematical production scheduling model based on a preset constraint, scheduling the non-locking order, and generating a non-locking order production scheduling result; and generating a first scheduling plan based on the locking order scheduling result and the non-locking order scheduling result. According to the method, under the condition of meeting service rule constraints such as different order types and priorities and production line productivity, multiple service indexes including the overall delivery time satisfaction rate, the production line load balance rate and the production line production operation efficiency are comprehensively considered, and the executable production line shift schedule can be dynamically calculated and output in real time; and the service purpose of real-time and accurate intelligent production scheduling is achieved.
Owner:深圳坤湛科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products