Hybrid power system, hybrid power vehicle, control method of hybrid power vehicle and vehicle control unit

Abstract

The invention discloses a hybrid power system, a hybrid power vehicle, a control method of the hybrid power vehicle and a vehicle control unit. The system comprises: an engine used for selectively outputting power to a wheel end; a drive motor; a generator; a power battery, wherein the capacity of the power battery is greater than or equal to a first preset capacity; a controller, wherein the controller is configured to obtain driving parameters of the hybrid power vehicle and control the engine, the driving motor and the power generator according to the driving parameters so as to enable theengine to work in an economic zone by performing charging and discharging control on the power battery, and compare the equivalent oil consumption of the hybrid vehicle in the series mode, the parallel mode and the EV mode to select the working mode with the lowest equivalent oil consumption as the current working mode of the hybrid vehicle, so that the hybrid vehicle works in the working mode with the lowest equivalent oil consumption according to the driving parameters, the energy consumption is low, therefore, the economy of the hybrid vehicle is effectively improved, and the use expectation of users is met.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a hybrid power system, a hybrid power vehicle and a control method thereof, and a vehicle controller. Background technique [0002] With the development of hybrid electric vehicles, users have higher and higher economic requirements for hybrid electric vehicles. Due to the current hybrid system architecture and its strategy, the energy consumption of the whole vehicle cannot be optimized, so it cannot meet the user's requirements for the economy of hybrid electric vehicles, and cannot meet the user's expectations. [0003] For example, in a traditional pure range-extended hybrid electric vehicle, because its system architecture can only generate electricity through the engine-driven generator and then provide it to the drive motor, even in the high-speed and medium-high-speed operating conditions where the engine is directly driven, it must be powered by the generator. There wi...

AI Technical Summary

Problems solved by technology

Due to the current hybrid system architecture and its strategy, the energy consumption of the whole vehicle cannot be optimized, so it cannot meet the user's requirements for the economy of hybrid electric vehicles, and cannot meet the user's expectations

[0003] For example, in a traditional pure range-extended hybrid electric vehicle, because its system architecture can only generate electricity through the engine-driven generator and then provide it to the drive motor, even in the high-speed and medium-high-speed operating conditions where the engine is directly driven, it must be powered by the generator. There will be a lot of loss in energy conversion, resulting in the inability to achieve optimal energy consumption in medium and high-speed working conditions, which in turn leads to low economic efficiency of the car

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