Parallel hybrid power vehicle power domain steady state control method

Abstract

The invention provides a parallel hybrid power vehicle power domain steady-state control method which is a basis for ensuring that a vehicle power domain is reasonably controlled under a long-time-domain steady-state working condition. A steady-state control strategy can be divided into two parts: 1, establishing a reasonable mode arbitration rule, determining a vehicle driving mode, solving the vehicle demand power according to the intention of a driver, then controlling a traditional engine and an electric drive system, guaranteeing that the synthesized torque of the vehicle reasonably follows the intention of the driver, and charging and discharging a power battery through braking energy recovery to improve the economical efficiency of the vehicle; and 2, solving a dynamic gear shifting rule and an economical gear shifting rule in different modes, and planning a target gear when the vehicle runs according to the vehicle speed and the pedal opening degree so as to obtain overall control variables of the parallel hybrid power vehicle, namely engine torque, motor torque and the target gear of the AMT. The development of the dynamic domain steady state control strategy is the key for improving the economical efficiency and the dynamic property of the vehicle.

Description

technical field [0001] The invention relates to the field of control of hybrid electric vehicles, in particular to a method for steady-state control of a power domain of a parallel hybrid electric vehicle. Background technique [0002] The new energy vehicle industry development plan (2021-2035) issued by the Ministry of Industry and Information Technology proposes to strengthen vehicle integration innovation technology to break through the complex coupling mechanism problem between different subsystems and further tap the comprehensive performance of the vehicle. For the P4 configuration hybrid vehicle, due to its complex structure, the rear wheel electric drive system in the power system is coupled with the traditional engine power in a timely manner, which makes the integrated control of the power domain of the P4 configuration hybrid commercial vehicle difficult, and new theories are urgently needed and technological breakthroughs. With the gradual deepening of the inte...

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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention designs a steady-state control method for the power domain of a parallel hybrid vehicle based on a P4 configuration hybrid vehicle, which can realize multi-objective and efficient integration of each sub-controller in the vehicle power domain, In turn, it can break through the control boundary of each sub-executive component, and improve the shortcomings of traditional distributed control communication, such as low communication efficiency, poor data transmission accuracy, and redundant wiring harness and controller functions. At the same time, the centralized power domain control architecture is also optimized for comprehensive control of multi-dimensional performance. Provide an advantageous platform foundation, which can give full play to the redundant drive characteristics of the P4 configuration hybrid, realize stable control in the power domain, improve the overall quality of hybrid vehicles, and meet the needs of users for smooth shifting, driving economy and vehicle power. need

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