Range extender system output torque verification method

Abstract

The invention discloses a range extender system output torque calibration method, and belongs to the technical field of range extender rack calibration, wherein accurate control over the output torque of the range extender, the calculated torque of the engine and the power generation torque is achieved, the torque control precision of the range extender is improved, and the operating efficiency of a range extender system can be improved. The method comprises the following steps: S1, completing basic performance calibration of a range extender rack; s2, formulating a range extender system torque verification grid area; s3, controlling the range extender to reach the target rotating speed of the range extender to the rotating speed coordinate point position of the engine load rate table; s4, enabling the load rate of the engine to reach the load rate axis position of the load rate table; s5, setting the electric torque of the range extender to be approximately equal to the target torque of the range extender; s6, setting the engine feedback torque value to be basically consistent with the target torque value; s7, repeating the torque verification step of the range extender until the torque verification of all working condition points in the range extender verification grid area is completed. According to the method, the accuracy in the energy consumption calibration process of the range extender can be improved.

Description

technical field [0001] The invention belongs to the technical field of range extender bench calibration, in particular to a method for calibrating the output torque of a range extender system. Background technique [0002] As a type of new energy electric vehicle, the extended-range electric vehicle has the excellent drivability of electric vehicles and eliminates the anxiety about the mileage of electric vehicles, and is currently receiving more and more attention. The connection method of the range extender engine directly connected to the range extender motor has the advantages of low cost and compact structure, but after the range extender engine crankshaft adds the rotor of the range extender motor, its moment of inertia and resistance torque will change, making the range extender engine The torque model of the range extender will produce deviations, which will affect the accuracy of the torque control during the operation of the range extender. Therefore, it is necessa...

AI Technical Summary

Problems solved by technology

The connection method of the range extender engine directly connected to the range extender motor has the advantages of low cost and compact structure, but after the range extender engine crankshaft adds the rotor of the range extender motor, its moment of inertia and resistance torque will change, making the range extender engine The torque model of the range extender will produce deviations, which will affect the accuracy of the torque control during the operation of the range extender. Therefore, it is necessary to correct the torque control accuracy of the range extender system.

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