Target gear calculating method and device

Abstract

The invention provides a target gear calculating method and system. The target gear calculating method comprises the following steps: obtaining the gearshifting parameter of a vehicle in real time, determining the best gearshifting point of the current power of the vehicle based on the gearshifting parameter and the acceleration curve of each gear, and determining the best gearshifting point of the current economy of the vehicle based on the gearshifting parameter and the fuel consumption curve of each gear; and based on the correspondence between the adjusting factor established in advance and a power gearshifting point and the correspondence between the adjusting factor and the economical gearshifting point of fuel, determining the best gearshifting point of the current power and regarding any best gearshifting point of the best gearshifting points of the current economy as the target gearshifting point. Through the target gear calculating method, the driving habit of a driver is obtained to determine the adjusting factor, and the gearshifting parameters under different working conditions are obtained in real time to realize precise gearshifting under different working conditions.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, in particular to a target gear calculation method and device. Background technique [0002] Automatic transmission, also known as automatic transmission, is usually used in vehicles to automatically change the gear ratio of the vehicle while the vehicle is running, so that the driver does not have to change gears manually, and is also used in large-scale equipment railway locomotives. [0003] In the prior art application of the automatic transmission, that is, when the automatic transmission needs to shift gears when the vehicle is running, the automatic transmission shifts gears mainly depending on the shift curve. The shift curve can be divided into power shift curve and economic shift curve. After integrating the two according to certain rules, it can be called comprehensive shift curve. The shift curve can determine the best shift point according to the control parameters. T...

AI Technical Summary

Problems solved by technology

[0004] However, when two parameters are used to determine the shift point of the automatic transmission, the shift point of the shift curve cannot be adjusted according to the real-time changes in the vehicle's rolling resistance coefficient, vehicle weight, gradient and other loads, especially for heavy-duty tractors. When it changes between 7 tons and 49 tons, the shift point obtained through the fixed shift curve seriously deviates from the theoretically required shift point

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