Gas Engine

Posted on | February 22, 2009 | 1 Comment

Gas Engine

Is a diesel engine or a petrol/gas engine and vehicle more environmentally friendly and why?

I've read that the diesel has greater emissions and has more sulpher so the diesel emissions are dirtier - is that so?.
So why is the diesel engine considered more environmentally friendly? Is it because of the feul efficiency of a diesel vehicle means you use less feul? And if so, what is that efficiency - a good diesel vehicle will get maybe 30% - 50% better mileage so does that mean the emissions are less that 30% - 50% worse than the gas/petrol engine?
Or are there other factors in this arguement that I haven't thought about?

Diesel engines are a slight improvement over gasoline engines. For starters, ultra-low sulfer diesel (ULSD) has become the norm, so sulfer isn't a concern with diesels anymore.

In terms of fuel efficiency, diesels improve over gasoline burning cars by 20-40%. However, diesel also emits 15% more greenhouse gas emissions per volume than gasoline, so it's a 5-25% improvement overall in terms of greenhouse gas emissions.

Diesels can usually also be run on biodiesel, which makes it a potentially environmentally-friendly alternative, because biofuels are part of the carbon cycle whereas burning petroleum products adds new carbon to the atmosphere.

"the Life Cycle Inventory Study of Biodiesel and Diesel Fuel completed in May 1998 by the U.S. Department of Agriculture and the U.S. Department of Energy...concluded that biodiesel reduces net emissions of CO2 by 78% compared to petroleum diesel."

Otto Gas Engine - 175HP

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The difference between a gas and a diesel run engine?

What is the difference between a gas engine and a diesel engine? I know the diesel doesn't use a carburetor i think.

what really defines them is the lack of an ignition system on a diesel.gas does use injectors, diesel as well.diesel runs a way higher compression ratio as well. another important differenceis the safety issue.a diesel's fuel supply is less likely to accidently combust.

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