Driving intention identifying method suitable for multi-performance comprehensive optimization of gear shift schedule

Abstract

The invention discloses a driving intention identifying method suitable for multi-performance comprehensive optimization of a gear shift schedule, and belongs to the technical field of step type automatic transmissions of cars. The driving intention identifying method comprises the following steps of: adopting a dynamic property and economical efficiency expectation fuzzy inferer to perform quantization on dynamic property and economical efficiency expectation of a driver separately, and determining emission performance expectation on this basis; respectively determining input parameters and output parameters of the fuzzy inferer according to the construction of the dynamic property and economical efficiency expectation fuzzy inferer, and determining subordinate functions of the input parameters and the output parameters; and finally, establishing a dynamic property and economical efficiency fuzzy inference rule base, and taking each performance expectation quantized value as a weighting coefficient to construct a gear shift performance comprehensive evaluative function which is used as a gear shift rule multi-performance index comprehensive optimization target function. On the basis of reflecting the driving intention of the driver, the driving intention identifying method enables dynamic property, economical efficiency and emission comprehensive performance of a whole vehicle to be optimal, and also enables automatic gear shift to be more personalized, so that the defect of simply sorting driving intentions in the prior art is made up.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions for automobiles, in particular to a driving intention recognition method that can be used for the comprehensive optimization of multi-performance indicators of shift schedules of stepped automatic transmissions. Background technique [0002] Automotive stepped automatic transmissions include hydraulic automatic transmissions (AT), electromechanical automatic transmissions (AMT) and dual-clutch automatic transmissions (DCT) with a fixed number of gears. As one of the core technical links of stepped automatic transmission, the shift schedule defines the control parameters of automatic transmission gear decision-making and the shift timing (shift point) determined by these parameters, which has great influence on the power and economy of the whole vehicle. have a significant impact on emission performance. It is an inevitable requirement for the development of automatic transmission ...

AI Technical Summary

Problems solved by technology

However, due to the lack of effective means to apply the results of driving intention recognition to the calculation of shift schedules reflecting driving styles, the existing driving intention recognition methods are difficult to meet the individual requirements for automatic shifting.

Images