Posts: 45
Threads: 22
Joined: Feb 2009
Reputation:
0
The non renewable nature of petroleum products, its high cost together with high amount of atmospheric pollution caused by it has been a major concern in automobile industry. Thus the need to conserve this non renewable petrol and yet meet the needs of booming automobile industry led to the birth of a new advanced engine ?Lean Burn Spark Ignition Engine.
The ratio of air to fuel in a spark ignition engine is on average 14.7:1. With the diminishing oil reserves and tightened legislations, fuel consumption and exhaust emission of spark ignition engines is to be reduced. The efficiency of lean burn engines is high due to the usage of higher air fuel ratio. Lean burn engine can reach unburned hydrocarbon and carbon monoxide emission targets.
The design features of lean burn engines can be improved with increased compression ratio, mixture swirl, mixture preparation, and improved ignition. As engine operates at leaner fuel levels, nitrogen emissions increase. Therefore, for lean burn engines to replace traditional fuel mixture engines, nitrogen oxide emission must be reduced. This can be done by catalyst or exhaust recirculation in the engine. However research continues to make lean burn engines ecologically viable..
Posts: 62
Threads: 27
Joined: Sep 2009
Reputation:
0
The non renewable nature of petroleum products, its high cost together with high amount of atmospheric pollution caused by it has been a major concern in automobile industry. Thus the need to conserve this non renewable petrol and yet meet the needs of booming automobile industry led to the birth of a new advanced engine -Lean Burn Spark Ignition Engine. The ratio of air to fuel in a spark ignition engine is on average 14.7:1. With the diminishing oil reserves and tightened legislations, fuel consumption and exhaust emission of spark ignition engines is to be reduced. The efficiency of lean burn engines is high due to the usage of higher air fuel ratio. Lean burn engine can reach unburned hydrocarbon and carbon monoxide emission targets. The design features of lean burn engines can be improved with increased compression ratio, mixture swirl, mixture preparation, and improved ignition. As engine operates at leaner fuel levels, nitrogen emissions increase. Therefore, for lean burn engines to replace traditional fuel mixture engines, nitrogen oxide emission must be reduced. This can be done by catalyst or exhaust recirculation in the engine. However research continues to make lean burn engines ecologically viable.
Posts: 60
Threads: 31
Joined: Aug 2009
Reputation:
0
Lean Burn Engines ,Lean-burn engines (both gasoline and diesel) enjoy higher fuel economy and cleaner emissions than conventionally tuned engines. By nature they use less fuel and emit fewer unburned hydrocarbons and greenhouse gases while producing equivalent power of a like-sized "normal" combustion engine. They achieve lean-burn status by employing higher combustion chamber compression ratios (higher cylinder pressure), significant air intake swirl and precise lean-metered direct fuel injectio
Posts: 57
Threads: 23
Joined: Aug 2009
Reputation:
0
I am B.Kousalya , studying 3rd B-TECH Mechanical
I like this topic and I want to give paper presentation on this topic,
I need working principle of this LEAN BURN SPARK IGNITION ENGINE and construction details, advantages and dis advantages
Posts: 60
Threads: 19
Joined: Jul 2009
Reputation:
0
can you please give a full seminar report on Lean Burn Spark Ignition Engine?
Posts: 63
Threads: 29
Joined: Jul 2009
Reputation:
0
can u plz upload a report or ppt for lean burn spark ignition engine..
