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A Calibration Method of Control Parameters in Shifting Process

A parameter calibration and process control technology, which is applied in fluid transmission devices, transmission devices, etc., can solve the problems of control parameter calibration methods and lack of calibration procedures, and achieve the effect of reducing calibration workload and meeting shift quality requirements

Inactive Publication Date: 2011-12-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the shift process of hydraulic automatic transmission is based on the control strategy determined in advance, and the control parameters of the shift process are optimized through experiments, and the necessary attention is not paid to the control parameter calibration method and calibration process.

Method used

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  • A Calibration Method of Control Parameters in Shifting Process
  • A Calibration Method of Control Parameters in Shifting Process
  • A Calibration Method of Control Parameters in Shifting Process

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Embodiment Construction

[0057]The invention divides the friction time into two parts, the torque phase and the inertia phase, and the smoothness of the gear shifting process mainly considers the torque peak value, torque fluctuation and shock degree. The calibration principle of the control parameters of the shifting process of the present invention is to optimize the smoothness index of the shifting process under the premise that the torque phase and the inertial phase sliding friction time respectively meet the requirements.

[0058] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0059] figure 1 It is the main flow chart of the method for calibrating the control parameters of the shift process in the specific embodiment of the present invention. Such as figure 1 As shown, the process includes the following steps:

[0060] Step 101, pre-calibrating the initial value of ...

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Abstract

The invention discloses a method for calibrating control parameters during a gear shift process. The method is suitable for a clutch-clutch-type hydraulic automatic transmission and comprises the following steps: pre-calibrating an initial value of the PWM value of a control valve of the clutch to be jointed, a stop value of the PWM value of a control valve of the clutch to be separated, and an initial value of the PWM value of the control valve of the clutch to be separated; pre-calibrating a stop value, filling rate and filling time of the PWM value of the control valve of the clutch to be jointed; calibrating a PWM marginal value of the control valve of the clutch to be separated; calibrating a PWM marginal value of the clutch control valve to be jointed; and calibrating the PWM descent speed rate of the control valve of the clutch to be separated. According to the technical scheme provided by the invention, not only can an intact method for calibrating control parameters during the gear shifting process for the clutch-clutch type hydraulic automatic transmission be provided, but also the work amount of calibrating during the gear shifting is reduced; and calibrated gear shifting process is ensured to meet the quality requirements of gear shifting.

Description

technical field [0001] The invention relates to the field of hydraulic automatic transmissions, in particular to a method for calibrating control parameters of a shift process. Background technique [0002] Hydraulic automatic transmission occupies a place in high-grade vehicles, construction machinery and military vehicles with its superior performance and mature technology, but the fuel economy of hydraulic automatic transmission has been criticized by people all the time. Obviously, reducing the volume and reducing the quality is an effective means to improve the fuel economy of the hydraulic automatic transmission. Compared with the traditional one-way clutch hydraulic automatic transmission, the clutch-clutch hydraulic automatic transmission is simple in design, small in size, light in weight and low in cost, and has developed rapidly in the last ten years. However, the clutch-clutch hydraulic automatic transmission cancels the one-way clutch of the traditional hydraul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/38
Inventor 黄英赵长禄张付军万国强李刚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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