Gear-shifting control method and system with driving style identification for automatic gearbox

Abstract

The invention discloses a gear-shifting control method and system with driving style identification for an automatic gearbox. The gear-shifting control method comprises the steps that 1 a driving parameter under a current automobile running condition is collected ; 2 lowpass filtering treatment is conducted on the driving parameter under the current automobile running condition; 3 a dynamic-property evaluation parameter SP is calculated under the current automobile running condition; 4 an automobile comprehensive dynamic-property evaluation parameter SPi is compared with a dynamic-property evaluation parameter SPi-1 obtained by the last time to confirm whether the automobile changes a gear-shifting point or not; 5 a new gear-shifting point is calculated to conduct gear shifting according to the dynamic-property evaluation parameter SPi under the current running condition. The gear-shifting control method and system with the driving style identification for the automatic gearbox have the advantages that the automatic gearbox gear can be adjusted automatically to conduct gear shifting based on the road condition and according to the driving style, the gear-shifting timing is more reasonable, the number of gear shifting is reduced, the fuel economy and working efficiency of the automobile are improved, and the quality of gear shifting is improved.

Description

technical field [0001] The invention relates to a shift control method of an automatic transmission, in particular to a shift control method of an automatic transmission with driving style recognition. Background technique [0002] Shift and launch control are key to automatic transmission control functions. Among them, shift control is the core issue of automatic transmission, which will directly affect the vehicle's dynamic performance, fuel economy, passability and adaptability to the environment. The gear shifting rule is the rule that the gear position changes with the control parameters, that is, the relationship between the gear position and the control parameters at the time of gear shifting. The research method of shifting rules is generally to find the main factors that affect the gear change from the operating status parameters of the vehicle (vehicle speed, traction, engine throttle opening, speed, torque, braking force, etc.), and establish a mathematical model...

AI Technical Summary

Problems solved by technology

However, when the working environment of the vehicle is complex and the driving style of the driver changes, its handling and control are very complicated. At this time, it is extremely difficult to establish an accurate mathematical control model.

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