Special automatic transmission brake belt piston clearance measuring and correcting method

Abstract

The invention discloses a special automatic transmission brake belt piston clearance measuring and correcting method. The method is characterized by comprising the steps that a reciprocating measurement mechanism measures a piston displacement; a piston cover measurement instrument measures the thickness of a boss of a piston cover; and a gasket measurement instrument confirms the thickness of a gasket. The method has the beneficial effects as follows: the special reciprocating measurement mechanism is used for measuring the piston displacement, the piston cover measurement instrument is usedfor measuring the thickness of the piston, and the gasket measurement instrument is used for confirming the thickness of the gasket; whether the actual thickness of the gasket is qualified or not is evaluated according to a gasket specification in an f range, obtained in the measurement; and the proper gasket is selected according to the range of the ideal thickness F to carry out correction, so that good response time is guaranteed, good gear shifting comfort is achieved, and the problem that the gear shifting comfort is adjusted by utilizing the response time which is relatively difficult tomeasure is avoided.

Description

Technical field: [0001] The invention belongs to the technical field of detection devices for auto parts, and more specifically relates to a method for correcting the piston clearance of a special automatic transmission brake belt. Background technique: [0002] The automatic transmission will automatically switch gears according to the actual vehicle speed and the opening of the accelerator when the car is running. torque for the car to accelerate; good shifting comfort directly affects the driver's driving experience and driving quality, and also plays a vital role in the high-speed operation of the car. [0003] Essentially, the main reason for the shock and delay of shifting is that the actual clearance of the clutch or brake band is quite different from the design clearance, which cannot be compensated by software and parameter calibration and self-learning. [0004] Adjust the size of the gap by selecting a suitable gasket to ensure good shifting comfort, and the size...

AI Technical Summary

Problems solved by technology

[0007] As mentioned in the CN 205860955 U patent, the method of measuring the gap between the piston and the brake band adopts the method of manual visual inspection of the scale, which has unstable factors in the gap and cannot be used in mass production. Meanwhile, this patent only gives Measurement method, there is no measure after unqualified measurement, there are certain limitations

[0008] For example, the measurement method mentioned in the CN 205664760 patent also uses manual operation and manual visual inspection, and there are unstable factors, and this patent is only used to judge whether the ejector rod is qualified, and there are no follow-up measures after the measurement fails. limitation

[0009] The gap is too large to cause shifting delay, the gap is too small to cause shifting shock, and the reaction time is the result of the comprehensive effect of many factors. How to choose a suitable correction method, choose a suitable gasket, and correct the automatic transmission is imminent.

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