A kind of electric vehicle driver demand torque calculation method

Abstract

The invention discloses a method for calculating the torque required by an electric automobile driver. The method includes the following steps that the style of the driver and the driving intension of the driver are detected, and the required torque is calculated; the safe interval is detected, and safety modification is conducted on the required torque. According to the method, the driving style and the driving intention of the driver are recognized, torque coefficients required under different styles and different intentions are adjusted, and therefore power is obviously improved for a dynamical type driver under the situation the opening degree does not approach the opening degree of a saturated accelerator pedal, power changes are gentle for an economical type driver under the situation of the normal small pedal opening degree, the situation that economical efficiency is reduced when the load changes of a power system are overlarge is easily reduced, the required torque can be increased according to the emergency degree of acceleration, and the instant requirement of the driver for the dynamic property of the automobile is met. Due to the fact that the maximum torque required by the driver is limited within the critical safety modification distance, when the calculation result is smaller than zero, the torque required by automobile power is forced to reset; the automobile can safely run after other automobiles, and tailgating traffic accidents are avoided.

Description

technical field [0001] The invention relates to an electric vehicle control technology, in particular to a method for calculating the driver's required torque of the electric vehicle. Background technique [0002] Energy saving, environmental protection and safety are the three major themes in the development of today's automobile industry. Electric vehicles (pure electric vehicles, hybrid electric vehicles, and fuel cell vehicles) emerging from the integration of various high-tech have become the most realistic way to solve energy and emission problems. one of the means of meaning. The driver's demanded torque directly reflects the driver's demanded vehicle power and expected energy consumption, so the calculation method of the driver's demanded torque has an important impact on the power and economy of electric vehicles. [0003] At present, the calculation of the driver's demand torque in electric vehicles is usually based on the accelerator pedal opening and the current...

AI Technical Summary

Problems solved by technology

However, under the same accelerator pedal opening, affected by different driver styles or different driving intentions, the driver's actual torque requirements for the vehicle are not the same; If the pedal opening is too large, traffic accidents such as rear-end collisions will occur. At this time, the calculation of the driver's demand torque should be safely corrected. The existing calculation method cannot meet the requirements.

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