The document discusses the engine control unit (ECU) and its functions. The ECU uses sensors to monitor systems like the engine, emissions and safety and actuators to control functions like fuel injection. It allows for improved engine performance, emission control and safety compared to conventional systems. Modern vehicles have up to 75 ECUs working together over a network to precisely control and monitor various vehicle functions.

1. TECHNICAL PAPER PRESENTATION
ON
ECU
PRESENTING
BY
K. NARENDRA REDDY N.MANOHAR BABU

2. Over view
WHAT IS ECU ?
WHAT IS THE NEED?
HOW IT WORKS?
CONVENTIONAL V/S ECU ?
NEW TECHNOLOGY
SAFETY AND SAFETY UNITS
EMISSION CONTROL
APPLICATIONS
CONCLUSION

3. WHAT IS ECU
ACTUATORS
ECU
SENSORS
It ‘s also called electric control module
ECM (OR) power control module(PCM)

4. Engine Control Unit (ECU)
 An ECU is an
embedded system that
controls/monitors
systems in a car.
Modern vehicles have
up to 75+ ECUs.

5. It uses the 32 bit processor
ENIGNE CONTROL UNIT MICRO
PROCESSESSOR
The cars “computer” is not one
system but a large number of small
subsystems connected together by a
network to the processor

6. WHAT IS THE NEED OF ECU ?
ECU
PERFORMANCE OF
ENGINE INCREASES
EMISSION
CONTROLSAFETY

7. HOW ECU WORKS ?
SENSOR ECU ACTUATORS

8. PERFORMANCE OF ENGINE
To increase the
performance o f engine
1)Fuel injection
2)Knocking
3)Air-Flow sensor
4)Engine speed
5)Cam
6)Thermistor etc..,
Sensors :

9. FUEL INJECTOR SENSOR
A fuel injector is nothing but an
electronically controlled valve.
Indirectly controlled variable : Air-fuel ratio
Directly controlled variable : Exhaust oxygen content
Manipulated variable : Quality of injection fuel
SENSOR: Zirconia or Titania based electro-
chemical

10. KNOCKING SENSOR
• Indirectly controlled variable ;Knock
• Directly controlled variable; Knock
sensor output
• Manipulated variable ;Ignition timing
• Sensor ;Piezo-electric accelerometer
• Actuator ;Ignition coil switch.
Transistor
• Sensor mounting location ;Cylinder
block or head

11. ENGINE SPEED SENSOR
– Engine speed sensor – Generally a Magnetic
Speed Sensor detects when ring gear teeth, or
other ferrous projections, pass the tip of the
sensor.
• Measured variable ;Wheel speed and engine
speed (Vehicle nav. Systems)
• Direct/indirect measurement ;Direct
measurement
• Sensor technology/ reference ;Magnetic
reluctance or Hall effect device
• Sensor mounting location ;Brake assembly and
crankshaft flywheel respectively

12. AIRFLOW SENSOR
• It is also called as load sensor
• Measured variable ;Mass airflow
• Direct/indirect measurement ;Direct and
indirect measurement of fuel injector
basic pulse width
• Sensor technology/ reference ;Various
forms including ‘flap’ type, ‘hot-wire’,
Karman vortex and thick-film diaphragm
• Sensor mounting location ;Within air
intake

13. TEMPARATURE SENSOR
• Measured variable ;Temperature
• Direct/indirect measurement ;Direct
measurement at various locations
Sensor technology/ reference ;
Thermistor or thermocouple depending
on temperature range
• Sensor mounting location ;Intake air,
outside air, catalytic converter, engine
coolant, hydraulic oil .

14. CAMLESS ENGINE
Operation of valves not
controlled by the cam shaft
but it controlled by the ECU
To control the valves solenoid
valves are used and they
controlled by the ECU at
required intervals of time

15. CONVENTIONAL V/S ECU
0
10
20
30
40
50
60
70
80
90
100
EMISSION FUEL ECONAMY PERFORMANCE SAFETY
CONVENTIONAL
ECU

16. NEW TECHNOLOGY
ECU
CAM
LESS
ENGINE
POWER
STEERING
INTER
COOLERCRDI
GDI
VVTI

17. SAFETY
• Humans Make Mistake
• In US alone, 400,0000 people die every
year in traffic accidents.

18. SAFETY UNITS
Air bag control unit (ACU): It protects the occupant in
the cars by inflating the thin nylon balloon from the
steering when automobile colloids with any object
 Body control unit (BCU) controls door locks, electric
windows, courtesy lights, etc.
 Brake Control Module (BCM) :
 Seat Control Unit
Speed control unit (SCU)

19. EMISSION CONTROL
• The oxygen sensor plays a critical role in
providing optimum engine performance with
minimal emissions.
• There are three basic types of oxygen sensors.
They are the:
• •Zirconia
• •Titania
• •Air Fuel

20. APPLICATIONS
• High-pressure pump
• common-rail
• gasoline injection systems a
• fuel injectors
• inter cooler turbo charger
• VVT-I ( Variable Valve Timing with intelligence)
• catalytic converter and sensors

21. CONCLUSION
• HIGH RELIABILTY AND DURABILTY WITH LOW POSSIBLE
INITIAL COST
• HIGH POWER OUTPUT AND TORQUE
• LOW LEVELS OF GASES AND PARTICULATED EMISSIONS
• LOW FUEL CONSUMPTION
• HIGH PERFORMANCE AND SAFETY

22. QUERIES