混合动力汽车整车控制系统

摘要

针对全球气候的逐步恶化、城市大气污染加剧以及石油资源过度消耗，许多国家都正在积极开发节能型、环保型汽车。混合动力车辆已成为汽车技术研究的热点，而总线通讯技术和分布式控制网络也在汽车电子领域广泛应用。混合动力汽车是传统燃油汽车和纯电动汽车两相结合的新车型，具有低污染和低油耗的特点，是当前解决节能问题、环保问题的切实可行的过渡方案。

为实现混合动力车辆能量管理和运动控制，基于DSP单片机和CAN总线技术实现混合动力汽车整车能量控制器的设计，包括电源管理模块、DSP外围配置电路、CAN接口电路、SCI串口通信电路、LCD显示电路、数据采集电路。DSP接收由数据采集单元采集来的车辆实时运行信息，如：加速踏板位置、刹车踏板位置、车速等信息，进行计算，求出车辆运行需要的发动机转矩、ISG 驱动电机转矩，并通过CAN总线以电信号的形式将输出传输到各个控制单元以实现整车的实时控制。

相对传统内燃机汽车，本控制器取消了发动机怠速；提高了发动机平均负荷率；实现了制动能量回收。优化了车辆的经济性。在车辆需要频繁加减速和怠速起停的城市循环工况下，节能效果更加明显。

关键词：CAN总线，DPS，混合动力汽车，整车能量控制

The Power Control System Of Hybrid Electric Vehicle

Abstract

With the deterioration of the global climate and the excessive consume of the oil resources,developing energy-efficient automobiles becomes an important direction in the automobile industry.Hybrid electric vehicle has become hot-spot in automotive engineering,and bus communication and distributed control network are widely used in automotive electronics.Hybrid electric vehicle employing two power souces-neternal combustion engine and electric motor,has been accepted world-widely as one of the most promising methods to solve these two problems.

To realize energy management and kinetic control of HEV,according to DSP and CAN communication carry out the the vehicle power control module ,including the power management module,DSP module,CAN communication module, SCI communication module and LCD module.DSP receives the data that collected of the vehicle that the unit collects by the data to go an information, such as:Accelerate pedal position and braking pedal position,speed information, carry on a calculation, beg the motor that a vehicle circulates a demand to turn and ISG to drive electrical engineering to turn,and pass the CAN communication delivers the exportation to each control unit by the form of telecommunication with carry out the vehicle power control module.

Opposite traditional internal combustion engine car, this controller canceled motor Dai soon;Raised a motor the burden rate is on the average;Carried out to make an amount of kinetic energy recall.It was excellent to turn the economy of the vehicle.Economize on energy effect Under circulating work condition in the city that needs to be multifarious to add and subtract soon to soon rise to stop in the vehicle,it's getting more obvious.

Key words：CAN bus，DSP，Hybrid electric vehicle，the vehicle power control module

目录

第一章绪论-------------------------------------------------------------------------------------------------------- 1

1.1本课题的背景、目的和意义 ------------------------------------------------------------------------ 1

1.2混合动力汽车国内外发展现状 --------------------------------------------------------------------- 3

1.3混合动力汽车的分类---------------------------------------------------------------------------------- 6

1.4混合动力汽车的特点及比较 ------------------------------------------------------------------------ 9

1.4.1串联式混合动力汽车的特点---------------------------------------------------------------- 9

1.4.2并联式混合动力汽车的特点--------------------------------------------------------------- 10

1.4.3混联式混合动力汽车的特点--------------------------------------------------------------- 10

1.5论文的研究内容--------------------------------------------------------------------------------------- 11 第二章方案论证 ------------------------------------------------------------------------------------------------ 12

2.1 ISG型HEV的工作原理 ---------------------------------------------------------------------------- 12

2.2控制器CPU的选择 ---------------------------------------------------------------------------------- 12

2.3 CAN总线的在混合动力汽车上的运用---------------------------------------------------------- 13

2.4动力总成控制系统的结构分析和选择----------------------------------------------------------- 15

2.5系统硬件总体框图------------------------------------------------------------------------------------ 15

2.6稳压芯片的选择--------------------------------------------------------------------------------------- 16

2.7 RS-232收发器接口芯片----------------------------------------------------------------------------- 17

2.8 CAN收发器 -------------------------------------------------------------------------------------------- 17

2.9 ISG型混合动力汽车动力传动系统布置方案和整车控制策略 ---------------------------- 17 第三章HEV动力总成硬件系统设计 ---------------------------------------------------------------------- 20

3.1系统的硬件需求分析--------------------------------------------------------------------------------- 20

3.2功能模块划分 ------------------------------------------------------------------------------------------ 20

3.3 TMS320F2812的介绍-------------------------------------------------------------------------------- 20

3.4 DSP最小系统及相关电路 -------------------------------------------------------------------------- 22

3.4.1供电电路---------------------------------------------------------------------------------------- 22

3.4.2复位电路---------------------------------------------------------------------------------------- 23

3.4.3时钟振荡电路 --------------------------------------------------------------------------------- 23

3.4.4 JTAG接口电路-------------------------------------------------------------------------------- 23

3.4.5 SCI串口通讯电路---------------------------------------------------------------------------- 24

3.4.6 AD转换电路----------------------------------------------------------------------------------- 24

3.4.6 CAN通讯接口电路 -------------------------------------------------------------------------- 25

3.5 LED灯与按键电路 ----------------------------------------------------------------------------------- 26

3.6 LCD液晶驱动电路 ----------------------------------------------------------------------------------- 27

3.7油门/制动踏板位置信号采集电路 ---------------------------------------------------------------- 27

3.8车速采集电路 ------------------------------------------------------------------------------------------ 28

3.9发动机转速采集电路--------------------------------------------------------------------------------- 29 第四章HEV动力总成软件系统设计 ---------------------------------------------------------------------- 30

4.1软件系统总体设计------------------------------------------------------------------------------------ 30

4.1.1能量控制算法 --------------------------------------------------------------------------------- 31

4.1.2主程序流程图 --------------------------------------------------------------------------------- 32

4.2 AD转换模块 ------------------------------------------------------------------------------------------- 34

4.3显示模块 ------------------------------------------------------------------------------------------------ 35