Research on Dynamic Performance of Power Shift Clutch

Applying power shift control technology on tractor can improve the power, economy and driving comfort of tractor. The separation and engagement control of clutch in tractor power shift transmission system is the key factor to optimize the quality of shift. Through many experiments and tests, an electronic control unit based on MC9S12 was developed, and an effective clutch control strategy was put forward, which improved the jerk of power shift and shortened the gear shift time.

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Calculation Algorithms for Automobiles’ Acceleration Performance

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.26-28.996 ◽

2010 ◽

Vol 26-28 ◽

pp. 996-999

Author(s):

Xian Yue Gang ◽

Yue Han ◽

Shu Feng Wang

Keyword(s):

Interpolation Method ◽

Dynamic Performance ◽

Linear Interpolation ◽

Test Results ◽

Acceleration Time ◽

Automobile Design ◽

Optimal Power ◽

Power Shift ◽

Calculation Algorithms ◽

Actual Test

Acceleration time, as an important dynamic performance index of an automobile, is classified as acceleration time of shift and acceleration time at a given gear to evaluate an automobile’s acceleration performance. Compared with the traditional calculation method, this proposed algorithm calculates an automobile’s speed of optimal-power shift by using linear interpolation; calculates the acceleration time using Gauss integral, and calculates the acceleration time to a given distance by combining conversion method and interpolation method. A numerical example is given and the actual test results indicate that this algorithm is fit for automobile design.

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Modeling and Analysis of Three-Parameter Power Shift Schedule for Pure Electric Bus of AMT

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.155-156.648 ◽

2012 ◽

Vol 155-156 ◽

pp. 648-652

Author(s):

Li Peng Luo ◽

Jun Qiang Xi ◽

Xing Long Liu ◽

Yu Hui Hu

Keyword(s):

Dynamic Performance ◽

Mechanical Transmission ◽

Vehicle Speed ◽

Vehicle Model ◽

Slope Surface ◽

Modeling And Analysis ◽

Shift Schedule ◽

Power Shift ◽

Electric Bus ◽

Two Parameter

The design of shift schedule is of great importance for the drivability of vehicular automatic mechanical transmission. Currently, the most widely used is two-parameter shift schedule, but it ignores the influence of dynamic conditions and ramp conditions. In this paper, a three-parameter power shift schedule based on vehicle speed, acceleration and throttle angle has been proposed, which makes the vehicle have the best performance in all kinds of slope surface. Then the vehicle model is established by Cruise and Matlab/simulink. The simulation results show that the three-parameter power shift schedule can effectively enhance the vehicle dynamic performance.

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Dynamic Characteristics Analysis of Power Shift Control Valve

Advances in Mechanical Engineering ◽

10.1155/2014/824853 ◽

2014 ◽

Vol 6 ◽

pp. 824853

Author(s):

Feng Ren ◽

Xinhui Liu ◽

Jinshi Chen ◽

Ping Zeng ◽

Boliang Liu ◽

...

Keyword(s):

Simulation Model ◽

Dynamic Performance ◽

Control Valve ◽

Simulation Software ◽

Vehicle Performance ◽

Construction Machinery ◽

Shift Control ◽

Power Shift ◽

Characteristics Analysis ◽

Variation Characteristics

In order to study the influence that dynamic performance of shift control valve has on shifting process of construction machinery, the paper introduces working principle of the shift control valve and sets up the dynamically mathematical model and corresponding simulation model with simulation software LMS Imagine. Lab AMESim. Based on simulation, the paper analyzes the influence of pressure variation characteristics and buffering characteristics acting on vehicle performance during the process of shifting, meanwhile conducting experiments to verify the simulation. The results indicate that the simulation model is accurate and credible; the performance of the valve is satisfactory, which indeed reduces impact during shifting. Furthermore, the valve can meet the demand of other construction machineries in better degree by suitable matching between control spring stiffness and damping holes diameter.

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Dynamical Analysis of Automobile Based on Principle of Optimal-Power Shift

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.694-697.242 ◽

2013 ◽

Vol 694-697 ◽

pp. 242-245

Author(s):

Jian Wei Li

Keyword(s):

Theoretical Foundation ◽

Simulation Analysis ◽

Dynamic Performance ◽

Automobile Driving ◽

Dynamical Analysis ◽

Optimal Power ◽

Power Shift ◽

Analysis Calculation ◽

Standing Start ◽

The Mathematical Model

The mathematical model of automobile driving was established, the calculation method of standing start acceleration time based on principle of optimal power continuous shift was introduced. The simulation analysis, calculation and verification were conducted by MATLAB. It lays the theoretical foundation for the analysis and calculation of dynamic performance by computer.

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