Ramp resistance obtaining method for hybrid electric vehicle

Abstract

The invention provides a ramp resistance obtaining method for a hybrid electric vehicle to solve the problems that ramp resistance calculation methods are lower in accuracy and deviation occurs easily in the prior art. According to the ramp resistance obtaining method, the driving force and the resistance of the vehicle are comprehensively considered, a vehicle dynamics equation is established accordingly, the acceleration resistance, the sliding resistance and the like outside the vehicle are considered during conversion, meanwhile, the inertia resistance caused by all rotating parts inside the vehicle is further considered, due to comprehensive consideration, the estimated ramp resistance is accurate and reliable with the obtaining method, and an important basis is provided for a shifting strategy, an SOC (state of charge) balance strategy and a torque distribution strategy for ramps.

Description

technical field [0001] The invention relates to the technical field of automobile electronics, in particular to a slope resistance estimation method of a hybrid electric vehicle. Background technique [0002] Hybrid technology has now entered a mature stage, while technologies such as fuel cell technology, pure electric technology, hydrogen-burning engines, and alternative fuels are still in the research and development stage due to limitations of a series of problems such as technical bottlenecks and infrastructure construction. Therefore, the marketization of hybrid electric vehicles will become more important at present. In the process of research and development of hybrid electric vehicles, technologies such as battery modules, powertrains, and hybrid control units (Hybrid Control Unit, HCU for short) are key factors in the research and development of hybrid electric vehicles. difficulty. [0003] Among them, HCU realizes the control, coordination and energy distributio...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing slope resistance estimation method has low precision and is prone to deviation, the present invention provides a method for obtaining slope resistance of a hybrid electric vehicle. The hybrid electric vehicle includes an engine, an ISG motor, a rear motor, a front transmission box, rear transmission mechanism, front drive axle, and rear drive axle; the output shaft of the engine is connected to the front drive axle through the front gearbox after being connected to the ISG motor, and the rear motor is connected to the front drive axle through the rear transmission a mechanism connecting the rear drive axle;

Images