Vehicle energy integrated management method and system based on 48V mild hybrid system

Abstract

The invention discloses a vehicle energy integrated management method based on a 48V mild hybrid system, and relates to the field of mild hybrid automobile system management. The technical problems that each system on a mild hybrid automobile works independently, so that the performance of a single system is limited, and the energy utilization rate is relatively low is solved. The method comprisesthe step of enabling an engine, the 48V mild hybrid system, a waste heat recovery system and an air conditioning system to work independently or cooperatively according to the running state of the automobile. The invention further discloses a vehicle energy integrated management system based on the 48V mild hybrid system. The mutual cooperative work of the systems is realized, the existing resources of the systems are fully utilized, the waste heat energy utilization efficiency of the engine is greatly improved, and the purpose of further reducing the oil consumption of the automobile is achieved.

Description

technical field [0001] The present invention relates to the system management of a light hybrid vehicle, more specifically, it relates to a vehicle energy integrated management method and system based on a 48V light hybrid system. Background technique [0002] The hybrid system, waste heat recovery system and air-conditioning system of the current hybrid electric vehicle work independently, and they have not realized the mutual cooperation between the systems, resulting in limited performance of a single system, or the utilization rate of engine waste heat energy is relatively low under some working conditions. low problem. [0003] Among them, the hybrid system and waste heat recovery system are the two most effective means to improve the fuel utilization rate of traditional internal combustion engines. The strong hybrid system can reduce the comprehensive fuel consumption of the vehicle by 15%-80% (related to the operating conditions and different hybrid schemes), and the...

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Problems solved by technology

[0011] However, the parking air conditioner driven by the internal combustion engine modified separately has low efficiency, high noise, poor user experience, and involves legal issues related to illegal modification

The traditional electric-driven parking air conditioner, because its power supply shares the starting battery of the vehicle, has a limited effective capacity, and the starting battery of a general vehicle does not have a power management system, so it is impossible to accurately predict the remaining power. The user has been in a state of uneasy anxiety during the air conditioner, worrying that the remaining power of the battery is not enough to ensure the starting of the engine

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