automotive transmission - automated mechanical transmission

服务未来汽车人才

Technische Gemeinschaft der Chinesisch-Deutschen Automobilindustrie

Automotive Transmission2 – Automated Mechanical Transmission

Priciple and ECU Control of AMT

M.Sc. Lin Li, M.Sc. Tinghui Hu, M.Sc. Jiafei Peng

Braunschweig, 10.07.2010

© Technische Gemeinschaft der Chinesisch-Deutschen Automobilindustrie 07/2010

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Contents

• AMT Structure and Principle

• AMT Actuator Types

• ECU Control Architecture for AMT

• Advantage and Disadvantage of AMT

• Summary

Automotive Transmission


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Contents





• Summary



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AMT Structure and PrincipleTransmission of VW Lupo 3L

• Gearbox

• Clutch

• Sensors

• Actuators

• Other accessories


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AMT Structure and PrinciplePrinciple of Manual Transmission

• The movement of gearstick in 2 directions

• Blue arrows show the movement of gear select

• Red arrows show the movement of gear engaging

• All movements triggered by driver

[VW SSP]


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AMT Structure and PrinciplePrinciple of AMT

• Replace the “mind” of driver with ECU

• Replace the “feel” of driver with sensors

• Replace the “hand” of driver with actuators

[VW SSP]


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AMT Structure and PrinciplePrinciple of AMT

• Replace the “mind” of driver with ECU

• Replace the “feel” of driver with sensors

• Replace the “hand” of driver with actuators

[VW SSP]


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AMT Structure and PrincipleTransmission of VW Lupo 3L

• Gearbox

• Clutch

• Sensors

• Actuators

• Other accessories

Hydraulic pump

Clutch Actuator

Potentiometer

Gear Actuator

Gearbox

Engine


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AMT Structure and PrincipleActuators for Gear Select and Engaging

Gea

r E

ngag

ing

Gear Select

Which actuator for which movement?

1 3

2 4

5R

N


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AMT Structure and PrincipleGear Actuators in VW Lupo 3L

Gear Actuator

Clutch Actuator

• 2 valves for gear select

• 2 valves for gear engaging


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AMT Structure and PrincipleValves for Gear Select and Engaging

[VW SSP]




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[VW SSP]




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AMT Structure and PrincipleGear Select

• On-off valve

• Electrical binary input

• 4 possible positions (Combination of 2 on-off valves)


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[VW SSP]




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• 2 3-way proportional valves

• Precise control of collar (dog gear)

• Position or force control


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• Summary



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AMT Actuator TypesManual Transmission

by HMTI


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AMT Actuator TypesAutomated Mechanical Transmission

Sensors by HMTI


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AMT Actuator TypesActuators (Sorted by Source of Power)

Hydraulic

Machine difficulty

Leakage

Oil Requirement

2

Pneumatic

Condensability of Air↓

Performance

Volume

1

Electric

Drift

Control Accuracy

3

Heavy-dutyCommercial

Vehicle

Heavy-dutyCommercial

Vehicle

Suitable for any type

Suitable for any type

Suitable for any type (Light-duty)Suitable for any type (Light-duty)

Viscosity → Performance

Power/Mass

Spatial Arrangement

Cost

Power Consumption

Cost

Machining Process


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AMT Actuator TypesComparison of 3-type Actuators

Type

Property


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AMT Actuator TypesPneumatic Actuator

by HMTI


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AMT Actuator TypesHydraulic Actuator

1. Oil Supply Orifice

2. Hydraulic Cylinder

3. Piston Rod

4. Select and Shift Fork

5. Oil Outlet Orifice


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AMT Actuator TypesElectric Actuator


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Contents





• Summary



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ECU Control Architecture for AMTAutomotive Transmission


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ECU Control Architecture for AMTSoftware Development Flow

• Hardware Driver: I/O, A/D, PWM, CAN, LIN…

• Basic Software

• Simulink / Stateflow Modeling (Inputs, Outputs and Algorithmus)

• Application SW Components Implementing


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ECU Control Architecture for AMTPossible Inputs and Outputs for Transmission ECU

Recieving Rx Signals Sending Tx Signals

Airbag State Gearshift Lock

Emotor State Clutch Status

Gateway State Driving Position

Hybrid State Aimed Gear Position

Motor State Aimed Motor Speed

Engine Cooling Temperature StartStopp Info

ABS Throttle Position Input Motor Speed

ABS Load Value Charisma Status

ABS Pedal Position Clutch Temparature

Rad Bremse Moment Additional Warnings

Gearshift Status Sperre Errors

Gearshift Sensor Position

Gearshift Status


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ECU Control Architecture for AMTECU Software Module Architekture Example

Communication Services

Microcontroller

Real Time Operating System

Microcontroller Drivers I/O Drivers

I/O Hardware Abstraction

Memory HW Abstraction

System Services

Onboard Device Abstraction

Communication Drivers

Communication HW Abstraction

Application

PO

RT

Driv

erP

OR

T D

river

Memory Abstraction Interface

Memory Abstraction Interface



WatchdogInterface

WatchdogInterface

AD

C D

river

AD

C D

river

PW

M D

river

PW

M D

river

DIO

Driv

erD

IO D

river

CanInterface

CanInterface

Boo

tloa

der

Boo

tloa

der

FlexRayInterfaceFlexRayInterface

Memory Drivers

LIN Interface

LIN Interface

Memory Services

COMCOM DCMDCMECU State ManagerECU State Manager

Watchdog ManagerWatchdog Manager

Watchdog Driver

Watchdog Driver

MCU DriverMCU Driver EEPROMEEPROM FLASHFLASH SPI

Handler DriverSPI

Handler DriverLIN

DriverLIN

DriverCANDriverCANDriver

FlexRay Driver

FlexRay Driver


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ECU Control Architecture for AMTV Model

Test Grade SW Test

Test Grade SW Integration Test

Test Grade SW Modul Test

SW Fine Design

SW Raw Design

SW- Requirements-Spezification

Software-Code

Compliance, Risk, Quality Management

Review-Process Test-Process

CRQ-Process

Requirements from OEM

Development-Process


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Contents





• Summary



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Advantage and Disadvantage of AMTAutomotive Transmission

• Advantages:

• High efficiency

• Low costs

• Relieve the driver from gear shifting and prevent driving error

• Better fuel consumption

• Better drivng comfort

• Disadvantages:

• Tractive force interruption during shifting process (Shift Quality)

服务未来汽车人才

Technische Gemeinschaft der Chinesisch-Deutschen Automobilindustrie

Thank You!M.Sc. Lin Li, M.Sc. Tinghui Hu, M.Sc. Jiafei Peng

TG-CDATechnische Gemeinschaft der Chinesisch-Deutschen Automobilindustrie

[email protected]

www.tg-cda.de

automotive transmission - automated mechanical transmission

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