The document discusses Homogeneous Charge Compression Ignition (HCCI) engines. HCCI engines mix fuel and air thoroughly before ignition, allowing combustion to occur via compression like a diesel engine, but using gasoline like a spark ignition engine. This results in greater efficiency and less emissions than traditional engines. However, HCCI engines can be difficult to control and have a limited power range. The document explores HCCI engine design, development challenges, applications, and advantages over traditional engines.

1. HOMOGENEOUS CHARGE
COMPRESSION IGNITION ENGINES
• By:
GANESH
USN:1NH14MMD14

2. CLASSIFICATION
• Spark Ignition System
• Laser Ignition System
• Homogeneous Charge Compression Ignition System

3. SPARK PLUG IGNITION
SYSTEM

4. LASER IGNITION SYSTEM
• Process of combustion by the pulse of laser light
• Works same as that of spark ignition

5. HCCI SYSTEM
• Fuel injected via fuel injectors air
induction is achieved independently.
• Fuel and air have been fully introduced and mixed
• Heat generated and combustion takes place.

6. WHAT IS HCCI??
• Gives efficiency as high as
compression ignition.
• Produces less oxides of
nitrogen an particulate matter.
• Works on dilute fuel mixture.
• Low pressure fuel injection.

7. WORKING OF HCCI
Exhaust port closes before next stroke
begins

8. HCCI ENGINE DESIGN
• Variable Compression Ratio
• Supercharging and Turbocharging
• Fuel injection

9. DEVELOPMENT IN HCCI
• Ignition control
• Combustion rate Control at High load
• Cold-start
• Emission Control

10. APPLICATION OF HCCI
• Nissan modulated kinetic system
 Low-Temperature Combustion
 Late injection
• Honda AR Motorcycle engine
 Cylinder liner having an end
extension
 Works as a spark ignition engine at
high loads

11. HUSQVARNA
• Partial HCCI System.
• Two stroke engine is used.
• Exhaust port is blocked very early

12. SPARK IGNITER VS. HCCI IGNITER
50%
45%
40%
35%
30%
25%
20%
15%
10%
5%
0%
THERMAL Efficiency CO2 CONTENT
Spark Igniter
HCCI Igniter

13. SPARK IGNITER VS. HCCI IGNITER

14. ADVANTAGES AND DIS-ADVANTAGES
Advantages
• 15% increase in fuel efficiency.
• Compatible with gasoline as fuel.
• Fuel is burned quicker and at low temperature.
Dis-Advantages
• High Cylinder Pressure.
• Limited power range.
• Combustion is defficult to control.

15. CONCLUSION
• HCCI can be used as an alternative engine for CI and SI
engines.
• On application 10-15% of thermal efficiency can be
increased.
• Help full for “Go Green”