Slope traveling method based on P2 structure hybrid power system and control system

Abstract

The invention discloses a slope traveling method based on a P2 structure hybrid power system and a control system. The slope traveling method comprises the following steps that firstly, a clutch is controlled to be disengaged, when the clutch is in a disengaged state, an engine is started through a starting engine, the engine enters an idling state, and the rotating speed SpeedRef corresponding toback electromotive force established by an ISG motor is obtained; the engine is controlled to execute a speed regulation instruction, so that the rotating speed is regulated to SpeedRef; the engine reduces the torque; an ISG motor controller is enabled, and the rotating speed of an ISG motor is adjusted to SpeedPower; the torque Tout of the optimal economic point is obtained, the engine executesthe torque adjusting action, and the torque is adjusted to Tout; a required torque Tneed of the whole vehicle is caluclated; and the Tout and the Tneed are compared, when the Tout is larger than or equal to the Tneed, the ISG motor charges a power battery, and when the Tout is smaller than the Tneed, the output power of the engine is not changed, the required power Pneed of the whole vehicle is reduced, and slope traveling is achieved. The problem that a vehicle still needs to run when a battery of the vehicle cannot be discharge dor the discharge power is insufficient to start an engine is solved, and it is ensured that the vehicle can run.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method and control system for slope travel based on a P2 structure hybrid power system. Background technique [0002] In recent years, major ministries and commissions of the country have issued a series of policies on promoting the development of new energy vehicles, and hybrid vehicles have also developed rapidly. The P2 structure hybrid power system has become the mainstream of the hybrid power system because of its advantages such as cost and fuel saving effect. [0003] At present, the research of the P2 structure hybrid power system is the control method under the normal mode. According to the basic control method, it is a general method to control the operation mode of the whole vehicle. However, when there is an abnormal mode, the general control method cannot meet the driving needs. The abnormal mode specifically refers to when the power battery cannot be ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a slope driving method and control system based on a P2 structure hybrid power system, which solves the problem that the vehicle still needs to drive when the battery cannot be discharged or the discharge power is not enough to start the engine, ensuring that the vehicle can drive

Images