Driving power generation control method and device, storage medium and vehicle control unit

Abstract

The embodiment of the invention provides a driving power generation control method and device, a storage medium and a vehicle control unit. The method comprises the following steps: controlling an engine to output torque according to a set engine target torque according to an obtained battery state of charge (SOC); setting a correction coefficient of the target torque of the engine according to the SOC of the battery; according to the correction coefficient and the engine target torque, the corrected engine target torque is generated; generating a generator target torque according to the corrected engine target torque and the obtained driver demand torque; and adjusting the generator according to the generator target torque to control power generation. In the technical scheme provided by the embodiment of the invention, the target torque of the engine during driving power generation is corrected through the change of the SOC of the battery, and then the target torque of the generator is generated according to the corrected target torque of the engine and the obtained torque required by the driver to control power generation. The fuel economy of the whole vehicle during running is improved, and the electric quantity balance of the whole vehicle is kept.

Description

【Technical field】 [0001] The present invention relates to the technical field of automobiles, in particular to a driving power generation control method, device, storage medium and vehicle controller. 【Background technique】 [0002] In the related art, the power system of a dual-motor hybrid electric vehicle is composed of an engine and a starter / generator integrated motor (Integrated Starter and Generator, referred to as ISG) or a belt-type starter / generator integrated machine (Belt-DrivenStarter Generator, referred to as BSG) and a clutch, drive Composed of motor and power battery pack. Pure electric (Electric Vehicle, referred to as EV) drive mode, series drive mode, and parallel drive mode are the main drive modes of this type of hybrid electric vehicle. Among them, the parallel drive mode can be subdivided into parallel direct drive mode, parallel power generation mode and parallel power assist mode. Three modes. [0003] In order to improve the economy of the whole v...

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Problems solved by technology

In the related art, there are mainly two methods for controlling the parallel power generation mode during driving. One is a method based on the state of charge (State Of Charge, referred to as SOC) judgment of the target balance point of the battery. During operation, obtain the SOC of the power battery and the speed of the hybrid vehicle in real time, and further judge whether the SOC of the power battery is less than or equal to the preset target balance point SOC; if the SOC of the power battery is less than or equal to the preset target balance point SOC, According to the vehicle speed of the hybrid electric vehicle, the generating power of the auxiliary motor and the working mode of the power motor are adjusted to control the hybrid electric vehicle to generate power while driving in different power generation modes. The disadvantage of this method is that only the target SOC balance point is considered. Does not take into account the fuel economy of the engine when the vehicle is running

Another method is to compare the load area where the driver’s demand torque is located with the economical range of engine operation, and at the same time consider the current SOC and the SOC upper limit of driving power generation, and calculate the target torque of the generator in different load areas. The disadvantage is that it is limited by the SOC preset range of driving power generation and cannot cover all working conditions. For example, when the SOC is high, driving power generation cannot be performed, and the economy of the whole vehicle will be affected

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