Engine Management System/ ECU
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ECU/ EMS
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The ECU is the core/brain of an automobile...its control domain spans from the power-train to auxiliary functions such as parking assist & lighting.
Transcript of Engine Management System/ ECU
ECU/EMS
OPERATION PARAMETERS
Power/Mech. Efficiency A/F Ratio
Volumetric Efficiency
Specific O/P
Specific Fuel Consumptn
Thermal Eff/Ht. Balance
Exhaust Smoke
Effective Pr’
Torque
Sensor I/P ECU Stage Actuator O/P
EMS SCHEMATIC
SENSOR LISTPRIMARY
MAPMAFCrankshaft positionOxygenVR TachoThrottle PositionKnock SensorEngine RPMIntake Air TEMP
SECONDARY
Transmission fluid tempBrake force meterTire PressureTSS-Turbo SpeedEngine Coolant TempNEUTRAL STARTA/C Compressor Relay
TERTIARY
Blind-SpotParking SpeedDoor ClosureProximityCurb SensorStop LightHead Light
CONTROL SYSTEMS
•Mechanical Design Solution•Non-adaptiveSTAGE I•Hardwired Chip•Application Specific•Non ProgrammableSTAGE II•Common base hardware•ProgrammableSTAGE III
Standard ECU SystemsAirbag Control
ModuleBody Control
Module
PSCU-Steering
Power train Control
Module(PCM)
HMI BCU/ABS/ESC
TCUDCU
Power-train Control Module
[PCM]SENSOR INPUTS:
MAF/MAP- Intake air density
VR TACHO- Engine RPMCR POS- Crankshaft
AngleIDLE SET-Idle Speed THROTTLE POSKNOCK TRANSMISSION ECU
CONTROL OUTPUT:A/F Ratio- Inj. Timing/PrIg. TimingIdle Speed SetVVTTransient FuelingGear Control Ig. CutoffRev LimitTurbo Waste-gate limit
ADVANTAGESEase of ControlAdaptable to multiple scenarios Very low cost compared to mechanical systemsOccupy lesser space-compact engine bayLess complicated design Zero wear
UNIQUE FEATURES
SERVICE SETTING:List of service
parametersRange of acceptable
values OR time limits (modifiable)
Service Indicator LightProgram reset
OBD-On Board DiagnosticsSelf detection of possible
faultsSensor scanning
subsystemsFault codes stored in ECU
memoryAll cars after 1996 OBD-II
compliant
AUTO TUNINGSoftware on ECU known as a mapNew maps can be loaded to ECU [ process known as re-
mapping or flashing]Complete access to parameters such as fuel injection
quantity, boost pressure, ignition timing, idle speed setting
No costly equipment required, laptop, Tuner EMS s/w & ODB cable
Plug & play ECU’s with multiple maps available.
THANK YOU
