Calculation Method of Transient Temperature of Friction Clutch Based on Four-parameter Model
A four-parameter model, transient temperature technology, used in design optimization/simulation, sustainable transportation, geometric CAD, etc., can solve problems such as large computing memory, temperature rise, slow speed, etc., to improve model accuracy and precision. , The effect of good adaptability to working conditions
Active Publication Date: 2022-03-18
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
However, DCT gearboxes, especially dry DCTs, have the disadvantage of high temperature rise, so real-time temperature control of dry DCTs is an urgent problem to be solved
[0003] The existing transient temperature of the clutch can be calculated by the two-parameter model of the temperature field. The values of the two parameters (temperature rise coefficient and heat dissipation coefficient) in the existing model change with the change of working conditions. Therefore, the finite element temperature calculation method is usually used, and there is Disadvantages such as large computing memory and slow speed
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Embodiment
[0024] This embodiment provides an improved two-parameter model for more accurately describing the temperature field of the friction clutch, which has higher precision, stronger ability to adapt to working conditions, and quick response. It can be used in the precise temperature calculation of the clutch and the related adjustment of the control strategy. The process includes:
[0025] 1) Identify the parameters of a fixed type of clutch at a specific ambient temperature, and obtain the model fixed parameter c 1 、c 2 , and then the definite iterative formula of the improved two-parameter temperature model is obtained.
[0026] 2) Add this model to the clutch temperature control strategy, and according to the real-time ambient temperature, initial temperature, speed difference and other information measured by the sensor, bring the determined iterative formula obtained in 1) into the calculation to obtain the temperature of the clutch body, and according to The control strat...
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The invention relates to a method for calculating the transient temperature of a friction clutch based on a four-parameter model, which is characterized in that the method adopts a four-parameter model instead of a two-parameter model to iteratively calculate the transient temperature of the clutch. , the temperature rise coefficient and the heat dissipation coefficient are both replaced as linear functions with ambient temperature and sliding power as variables. Compared with the prior art, the present invention not only considers the fact that frictional heat generation is related to the clutch radius, the obtained model is more accurate than the original model when compared with the actual situation, and the model parameters (temperature rise coefficient and temperature rise coefficient) of the used model are found. The linear relationship between the heat dissipation coefficient) and the ambient temperature and sliding power, and this relationship is brought into the two-parameter model, which makes the improved model more adaptable to working conditions.
Description
technical field [0001] The invention relates to a method for calculating the transient temperature of a friction clutch, in particular to a method for calculating the transient temperature of a friction clutch based on a four-parameter model. Background technique [0002] The friction clutch is one of the important parts of the ship's propulsion shaft system. It uses the mechanical friction between the friction surfaces to transmit the torque from the driving shaft to the driven shaft, and can engage or disengage the main engine and the driven shaft according to the work needs. Take the DCT gearbox with the most friction clutches as an example. It is called a dual-clutch automatic transmission. It is composed of a gearbox and two sets of clutches. Its components are not much different from manual gearboxes. It has the advantages of high power transmission efficiency and good fuel economy of manual transmission and the advantages of smooth shifting of automatic transmission. ...
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IPC IPC(8): G06F30/15G06F30/20
CPCG06F2119/08G06F30/15G06F30/20Y02T90/00
Inventor 陈俐邱之阳郑鹏飞
Owner SHANGHAI JIAOTONG UNIV