Engine start control method for a 48v micro-hybrid system

Abstract

The invention provides an engine starting control method of a 48V micro mixing system. The method comprises the steps that S1, the micro mixing system is powered on and initialized; S2, whether a keystarting signal is received or not is detected, if yes, a 12V starter is used for starting an engine, and if not, 48V system powering on is executed; S3, after a 48V system is powered on, whether theBSG motor starting engine condition is met or not is judged, if yes, whether the key starting signal is received or not is further detected, and when the key starting signal is received, a BSG motor starting engine is adopted, and if not, a 12V starter is adopted to start an electric generator. When the condition is met, a 48V BSG motor is used for carrying out engine first-time starting, the 48VBSG motor starting advance is used in a maximized manner, it is ensured that the starting need in each time can make a response in time, starting comfort of the 48V micro mixing system is improved, and the oil consumption and emissions are reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an engine start control method for a 48V micro-mixing system. Background technique [0002] The micro-hybrid technology realized by using 48V BSG (Belt-driven Starter / Generator, belt-driven starter / generator integrated motor) motor is currently a hot technology for energy saving and emission reduction of automobiles, and it is a hybrid that can effectively compromise fuel saving rate and economy. power scheme. By adding 48V motors, batteries and other components to the original 12V automotive electrical system of the car, functions such as advanced idling start and stop, engine operating condition optimization, acceleration boost, and braking energy recovery can be realized, and the fuel consumption of the whole vehicle can be reduced by 10~ 15%, and optimize vehicle drivability and NVH performance. Compared with the traditional 12V starter, the 48V BSG motor has a larger o...

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Problems solved by technology

[0003] However, due to the limitations of the working conditions of the battery, DCDC, and motor of the 48V system, at the same time, there may be faults during use, which makes the 48V BSG motor unable to start the engine normally. At this time, it is necessary to use a 12V starter to start the engine. engine

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