Energy control method of hybrid power vehicle

Abstract

The invention discloses an energy control method of a hybrid power vehicle. The method comprises the following steps: (1) observing current system states comprising a vehicle driving speed, driver pedal information, an SOC (State of Charge) of a battery, a rotary speed and a rotary torque and the like of an engine; (2) judging a current EVT (Electronically Controlled Continuously Variable Transmission) mode state according to the vehicle driving speed and the driver pedal information and updating a current system model and system constraint; assuming that the EVT mode state in a predicated time domain keeps unchanged; (3) predicating a future vehicle speed in the predicated time domain to obtain a system observation input amount in the predicated time domain; (4) constructing a predicationcontrol optimization problem in the predicated time domain and carrying out numerical solution online through a dynamic planning algorithm; (5) calculating to obtain an optimal control sequence in the predicated time domain; (6) only adopting a first group of optimal control quantity and acting to the system at a sampling moment; removing the residual control quantity; (7) repeating the process at the next moment until driving is finished.

Description

technical field [0001] The invention relates to an energy control method for a vehicle, in particular to an energy control method for a hybrid vehicle. Background technique [0002] Hybrid vehicles are currently one of the effective ways to solve excessive vehicle energy consumption and air quality pollution. Among them, the dual-mode transmission system can better meet the special needs of heavy-duty off-road vehicles such as wide speed regulation range and large driving power compared with other forms of hybrid power transmission schemes, but the structure of this scheme is relatively complicated, and the requirements for energy control methods are more demanding. High, designing an optimal energy control method that can be used in real time will become the core content to ensure the normal and efficient operation of dual-mode hybrid vehicles. [0003] At present, the rule-based energy control method is most used in the industry. The design of rules is mostly derived from...

AI Technical Summary

Problems solved by technology

This method largely depends on effectively predicting the future speed of the vehicle. In the prior art, the future speed of the vehicle is assumed to remain constant; or the speed of the vehicle is assumed to change exponentially. These methods are simple but not accurate; Future driving speed; or predicting future speed by identifying repeated working conditions of special vehicles, these methods require the use of GPS systems or prior working condition information, and are not suitable for non-road vehicles without positioning systems and perception radars

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