Energy management and control method and device for plug-in four-wheel drive hybrid car

Abstract

The invention discloses an energy management and control method for a plug-in four-wheel drive hybrid car. The method comprises a finished car working mode judgment method and a distribution and control method for torque in different working modes. On the basis of guaranteeing the driving performance of a finished car, the working modes of the hybrid car and working points of an engine, an ISG motor and a rear-drive motor in the different working modes are reasonably controlled. The basic energy management of the plug-in four-wheel drive hybrid car is achieved by using a concise and practical control strategy based on a logic threshold. Compared with the prior art, the energy management and control method and device have the advantages that by using the control method, on the basis of guaranteeing the power performance of the plug-in four-wheel drive hybrid car, the output torque of all power units are coordinated and controlled, so that the engine works in a low-fuel-consumption area as much as possible, and the fuel economy of the hybrid car is improved.

Description

technical field [0001] The invention belongs to the field of new energy vehicle control, and in particular relates to an energy management control method and device for a plug-in four-wheel-drive hybrid electric vehicle. Background technique [0002] The current research focus on plug-in hybrid electric vehicles is focused on the key technologies of plug-in hybrid electric vehicles, and one of the most important aspects is the control strategy of plug-in hybrid electric vehicles; making a reasonable control strategy to make hybrid electric vehicles Optimal utilization of energy and reduction of fuel consumption and emissions are urgent problems to be solved in the control of plug-in hybrid electric vehicles. However, there is no recognized best control strategy yet. [0003] In the current hybrid electric vehicle control method, the mode switching is generally performed according to the magnitude of the demand torque, but the calculation of the demand torque is often only a ...

AI Technical Summary

Problems solved by technology

[0002] The current research focus on plug-in hybrid electric vehicles is focused on the key technologies of plug-in hybrid electric vehicles, and one of the most important aspects is the control strategy of plug-in hybrid electric vehicles; making a reasonable control strategy to make hybrid electric vehicles Optimal utilization of the energy and reduction of fuel consumption and emissions are urgent problems to be solved in the control of plug-in hybrid electric vehicles. However, there is no recognized best control strategy yet.

[0003] In the current hybrid electric vehicle control method, the mode switching is generally performed according to the magnitude of the demand torque, but the calculation of the demand torque is often only a function of the accelerator pedal stroke, which ignores the driver's driving intention, and the obtained Demand torque is not accurate

Some experts and scholars at home and abroad have studied the control strategy based on fuzzy torque recognition, taking into account the driver's driving intention, but this fuzzy-based method takes too long to calculate and cannot be applied to real vehicles.

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