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Idle speed control method for hybrid power system

A hybrid system, idle speed control technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., to achieve low noise and vibration levels, improve stability, and reduce idle fuel consumption.

Active Publication Date: 2016-08-03
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology does not take full advantage of the advantages of fast response and precise torque control of BSG motors to improve system performance
At present, BSG has realized the quick start technology, which makes full use of the above-mentioned advantages of BSG, but there is still no case of applying it to idle speed control

Method used

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  • Idle speed control method for hybrid power system
  • Idle speed control method for hybrid power system
  • Idle speed control method for hybrid power system

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Embodiment Construction

[0045] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046] Please refer to figure 1 As shown, it is a schematic structural diagram of the BSG micro-hybrid system in the embodiment of the present invention. The BSG micro-hybrid system includes: the engine and its management system EMS, the BSG motor and its controller MCU, the power battery and its management system BMS, the engine and The power transmission between the BSG motors is carried out through the belt, and the power battery provides the electric energy consumed by the BSG, or stores the electric energy generated by the BSG. The BSG motor is a three-phase AC motor, which includes an inverter for conversion between DC and AC. For simplicity, it is not shown in the figure. The vehicle controller HCU communicates with the EMS, MCU, and BMS through the CAN bus to complete the control of the micro-hybrid system and realize hybrid functions such as ...

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Abstract

The invention provides an idle speed control method for a hybrid power system. The method includes the steps that firstly, whether a vehicle is in an idle speed working condition or not is judged; secondly, if the vehicle is in the idle speed working condition, whether a motor system or a battery system breaks down or not is judged, if the motor system or the battery system breaks down, the third step is executed, and if the motor system or the battery system does not break down, the fourth step is executed; thirdly, the motor torque is set to be zero through an HCU, an idle speed control mode is set to be an EMS idle speed control mode, and idle speed control is executed through an EMS; and fourthly, the idle speed control mode is set to be an HCU idle speed control mode through the HCU, and idle speed control is executed through an HCU control motor and the EMS. By the adoption of the method, the motor torque is controlled through the HUC to control the idle rotation speed of an engine, the stability, accuracy and rapidness of idle speed control can be improved, the low noise and vibration level is obtained, frequent ignition angle adjustment of the engine can be avoided, and therefore the idle speed oil consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an idle speed control method of a BSG hybrid power system. Background technique [0002] With the urgent need for energy saving and emission reduction, BSG (Belt-alternatorStarterGenerator, belt-driven starter motor) micro-hybrid power system is becoming a hot spot in the research and development of the automotive industry. Compared with the medium-strong hybrid power system, the BSG micro-hybrid power system has the obvious advantages of low cost and significant fuel saving rate per unit cost. The BSG micro-hybrid system can realize basic hybrid functions such as engine start and stop, braking energy recovery, engine operating point optimization, and electric power assistance. On the basis of realizing the above functions, the BSG micro-hybrid system can also make full use of the characteristics of BSG motor's fast response and precise torque control to realize hybr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W10/26B60W40/10
CPCY02T10/62
Inventor 裴锋魏丹肖恺王俊华
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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