A method for judging the working state of an electric vehicle clutch

Abstract

The invention relates to a method for determining the working state of a clutch of an electric automobile. The method comprises the following steps of (1) determining the running state of the automobile; (2) determining forward gears by using a neutral gear signal and a reverse gear signal; (3) calculating the theoretical speed, which corresponds to the actual revolving speed of a driving motor, of each forward gear if the forward gears are determined, and calculating the theoretical speed, which corresponds to the actual revolving speed of the driving motor, of each reverse gear if reverse gears are determined; (4) correcting actually measured speed signals; and (5) determining the state of the clutch. The method for determining the working state of the clutch of the electric automobile has the advantages that the original state of the chassis of the automobile is kept, a position sensor for a pedal of the clutch is not required, the working state of the clutch can be determined by integrating the scheme in control software of a controller for the whole automobile, so that the torque control strategy of the controller for the whole automobile is optimized, and a control function is fulfilled. The method can be widely applied to electric automobiles with common friction disc type clutches.

Description

technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to a method for judging the working state of a clutch of an electric vehicle. Background technique [0002] Electric vehicles mainly include pure electric vehicles, fuel cell vehicles, and hybrid vehicles. Pure electric vehicles use high-voltage power batteries as the sole energy source, and rely on electric motors to drive vehicles, which have the advantages of zero emissions and low noise. At present, in the field of electric commercial vehicle manufacturing, many companies are restructuring on the basis of traditional internal combustion engine vehicle chassis. In most cases, due to cost considerations, the commercial vehicle chassis used for restructuring is equipped with a manual transmission. If the driver needs to shift gears during the driving of the reformed electric vehicle, he must control the clutch working state through the clutch pedal. [0003] With...

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Problems solved by technology

[0004] Therefore, it is very necessary to obtain the working state of the clutch to improve the driving performance of electric vehicles. However, the reality is that because the position of the clutch pedal is not a necessary input signal for traditional vehicles, many vehicle chassis are not equipped with clutch pedal position sensors. Vehicle production costs, and some models have no space arrangement at all due to structural constraints in the cockpit

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