Self-adaption matching method for automatic transmission idling breakaway torque
An automatic transmission and self-adaptive matching technology, which is applied in the control algorithm field of vehicle control technology, can solve problems such as increased development costs, high vehicle starting speed, increased engine fuel injection, etc., to achieve enhanced adaptability and robustness, Reduce idling fuel consumption and improve comfort
Inactive Publication Date: 2014-12-24
HUNAN UNIV
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Problems solved by technology
Therefore, if the torque ratio of the hydraulic transmission is too large, the fuel injection of the engine will be increased, the starting speed of the car will be too high, and the fuel economy of the vehicle will be affected, and the starting performance of the vehicle will be reduced.
[0005] Although redesigning the torque converter can improve these situations, the cycle of redeveloping the torque converter is long and costly. The characteristics of different engines are different, and the matching torque converters are also different, so Increase the development cost and increase the development cycle
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[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0021] see figure 1 . A preferred embodiment of the automatic transmission idle start torque adaptive matching method. In this embodiment, the engine idle output torque is mainly determined by the current hydraulic torque converter load torque. When the resistance of the vehicle is constant, then The output torque on the clutch driven plate is also determined. If the clutch does not slip, the output torque of the torque converter is equal to the output torque of the clutch plate, which is the resistance of the vehicle. According to the torque ratio of the torque converter, the torque of the pump wheel can be determined , and the torque of the pump wheel is equal to the output torque of the engine; if the clutch is slipping, the output torque of...
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The invention discloses a self-adaption matching method for an automatic transmission idling breakaway torque. An output torque of a hydraulic torque converter is reduced by controlling a driving disc and a driven disc of a clutch so as to control an idling output torque of an engine. When the self-adaption matching method is used for calculating current of a solenoid valve for controlling clutch pressure, the influence of junction friction is considered, and a fuzzy control algorithm is introduced by referring to dynamic characteristics of different wet type clutches to control sliding friction of the clutch. The sliding friction speed is regulated by simulation and tests so as to realize optimal control.
Description
technical field [0001] The invention relates to a control algorithm of the vehicle control technology, in particular to an adaptive matching method for the idling start torque of an automatic transmission for controlling the starting torque of the automatic transmission. Background technique [0002] A vehicle equipped with an automatic transmission is different from a vehicle with a manual transmission. The clutch pedal is eliminated, and the entire transmission system is different. The connection diagram between the engine and the automatic transmission is as follows: figure 1 As shown, the combination and friction of the wet clutch are realized by the controller of the automatic transmission by controlling the current of the solenoid valve to adjust the pressure of the clutch; the hydraulic torque converter plays the role of deceleration and torque increase, so that the output torque is greater than the input Torque, the torque ratio between the output torque and the inpu...
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IPC IPC(8): F16H61/02F16H61/40
Inventor 张飞铁周云山张军肖贻鹏蔡源春周晶晶
Owner HUNAN UNIV