Double-BSG weak mixing system of medium and heavy truck and control method

Abstract

The invention discloses a double-BSG weak mixing system of medium and heavy trucks and a control method, and relates to the technical field of automobile control. The double-BSG weak mixing system comprises a motor controller, a 48V storage battery and two BSGs, wherein the 48V storage battery and the two BSGs are respectively connected with the motor controller; and the two BSGs are connected with an engine in parallel. When the engine is in a starting state or an accelerating state, the motor controller is used for controlling the two BSGs to output positive torques; and at the moment, the 48V storage battery is in a discharging state to provide power for the two BSGs. When the engine is in an economical rotating speed state or a braking state, the motor controller is used for controlling the two BSGs to output negative torques; at the moment, the 48V storage battery is in a charging state and used for storing electric energy output by the two BSGs. According to the invention, the double BSGs are connected in parallel, and the motor controller controls the two BSGs to be in different working states according to different working conditions, so that start and stop, power assistance and energy recovery are provided for the medium and heavy truck engines, a better oil-saving effect is achieved, and the economy of the whole truck is improved.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a medium-heavy truck double BSG weak hybrid system and a control method. Background technique [0002] At present, the country is paying more and more attention to environmental protection. In January 2018, the National V emission standard was implemented nationwide, and the requirements for emission are becoming more and more stringent. In addition, from the perspective of national energy security, automobile oil consumption accounts for 60% of the total oil consumption. Therefore, whether it is a passenger car or a commercial vehicle, the production of more energy-efficient cars has become an inevitable choice. [0003] The automotive 48V weak hybrid system overcomes the problem of low power and excessive current in the low-voltage system, and its cost is extremely cost-effective compared with traditional vehicles and heavily hybrid new energy vehicles. BSG (Belt-Dr...

AI Technical Summary

Problems solved by technology

[0004] For medium and heavy truck engines with large starting power and starting torque, the starting power of low-power BSG is insufficient, and it cannot be commercially applied in the field of commercial vehicles; when high-power BSG is installed at the front end of the engine, due to its large size, there are problems in space layout. difficult, and does not have cost-effective advantages

Therefore, the current 48V weak hybrid system has no practical application on medium and heavy trucks

Images