Gear shift occasion judgment method and automatic transmission system

Abstract

The invention provides a gear shift occasion judgment method and an automatic transmission system using the same. The gear shift occasion judgment method is mainly used for judging the gear shift occasion of at least one gear. The gear shift occasion judgment method specifically comprises the following steps: selecting a first expected value and a second expected value from a expected value range, wherein the first expected value is larger than the second expected value; extrapolating a gear-in critical value for entrance of the gear by utilizing the first expected value and the gear ratio of the gear; and extrapolating a gear-exit critical value for exiting to the gear by utilizing the second expected value and the gear ratio of the gear. By adopting the gear shift occasion judgment method, a user can shift the gear at an optimal occasion point in a driving process, the shortcoming of frequent gear shift is effectively improved, and the user can concentrate the attention on road condition and safety and does not need to divert the attention to operate the transmission system.

Description

technical field [0001] The invention relates to an automatic transmission system of a vehicle, in particular to a method for judging shift timings and an automatic transmission system for avoiding frequent shifts at critical shift points. Background technique [0002] The progress of the times is such that energy is wasted. The earth's resources have gradually become scarce, especially fossil fuels. Therefore, green energy and its applications are in the ascendant. Whether it is solar energy, wind power, water power, geothermal and other so-called clean energy applications are all popular , of course, manpower itself is widely popular because of the concepts of energy saving, carbon reduction and health factors, and because bicycles can be regarded as the first choice for short-distance transportation, and at the same time they have fitness functions. However, the design of current bicycles with ten gears at every turn makes users often at a loss, so there is an attempt to s...

AI Technical Summary

Problems solved by technology

[0003] However, it has been seen that most of the transmission systems used for bicycles have a vehicle speed and a torque detection device to determine the mechanism of automatic gear shifting, or only use the vehicle speed as a mechanism for judging gear shifting, and the vehicle speed often fluctuates at the critical point of gear shifting. Sometimes there will be a problem of frequent shifting, which will cause discomfort to the user

In the hardware configuration of the known transmission system, an expensive torque meter must be used to detect the user's pedaling movemen

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