Optimal control method for vehicle starting process based on estimation of clutch transmission torque
A technology for transmitting torque and clutches, applied in transmission control, components with teeth, climate sustainability, etc., can solve problems such as reduced reliability of clutch transmission torque estimates, and achieve the effect of overcoming the impact
Active Publication Date: 2017-06-16
SHANGHAI AUTOMOBILE GEAR WORKS +1
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Problems solved by technology
However, this technology relies on the measurement and estimation of the engine torque, while other factors of the clutch transmission torque are not included in the method, which reduces the reliability of the estimated value of the clutch transmission torque.
Method used
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Embodiment 1
[0020] like figure 1 As shown, this embodiment includes the following steps:
[0021] Step 1. Collect vehicle running status information and vehicle attribute information.
[0022] The vehicle running state information includes: engine speed, clutch output speed, error between actual engine torque and nominal torque, output torque of vehicle transmission shaft, wheel speed and clutch transmission torque.
[0023] The vehicle attribute information includes: nominal engine torque, transmission ratio of first gear, transmission ratio of final drive, equivalent torsional stiffness of half shaft and tire, rolling resistance moment of tire, moment of inertia of engine crankshaft, equivalent moment of inertia of first gear, Vehicle mass, road gradient and rolling resistance coefficient.
[0024] Step 2. Establish an estimation model according to the longitudinal dynamics equation of the vehicle, perform linearization and discretization processing on the estimation model, and then u...
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A vehicle starting process optimal control method based on estimation of clutch transmission torque comprises the steps that vehicle running state information and vehicle attribution information are collected in real time, and according to a vehicle longitudinal dynamical equation, an estimation model is established; an extended Kalman filter is adopted for correcting the estimation model, and a clutch transmission torque estimation value is obtained; and finally a TCU is used for monitoring the state of a clutch, and whether the output torque of the clutch needs to be compensated or not is judged according to the requirement for target torque. By means of the method, needed information can be directly obtained from vehicles of mass production, real-time estimation can be achieved as long as a program of a controller is modified, and the influence to the estimation of the clutch torque by inaccurate information of the torque of an engine can be effectively overcome.
Description
technical field [0001] The invention relates to a technology in the field of vehicle control, in particular to an optimal control method for a vehicle starting process based on clutch transmission torque estimation. Background technique [0002] At present, with the improvement of people's requirements for automobile fuel economy and driving comfort, the share of automatic mechanical transmission (AMT) and dual-clutch automatic transmission (DCT) in automobile automatic transmission is gradually increasing. [0003] Neither the AMT nor the DCT has a hydraulic torque converter, and starts with a clutch. During the starting process, the torque control of the clutch has an important influence on the starting performance of the two types of transmissions. Timely acquisition of the torque information of the clutch during the starting process is of great significance for improving the starting control ability of the clutch. However, due to the limitation of cost and installation ...
Claims
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IPC IPC(8): F16H61/00
CPCF16H61/00F16H2061/0012Y02T10/60
Inventor 鲁统利张建武郝洪涛李育黄明礼任飞多
Owner SHANGHAI AUTOMOBILE GEAR WORKS