Word is out on L4 as standard full size pickup engine for GM

FishOnOne wrote:

ShinerBock wrote:

FishOnOne wrote:

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

They will add port injectors like Ford did before particulates filters are added.

While that reduces them at idle and under low load(especially in emission testing scenarios) it doesn't eliminate them once the DI kicks in at mid/high load. If the EPA testing gets more strict(just like it always does) to include these mid/high load scenarios then a PM filter will be needed eventually.

And they'll increase fuel pressure to improve atomization. I doubt we'll see a exhaust filter anytime soon.

Easier said than done for gasoline without running into detonation issues. Although it is the better atomasition of gasoline than diesel that makes finer particulate matter. Not saying it will come in the next five years or so and it will mainly depend on the political climate. It may happen in Eurpoe or Claifornia first.

Read the attached link from Road & Track about the 2019 Chevy truck 4 cylinder turbo gas engine. Apparently the turbo 4 generates it's peak torque of 348 ft. lbs. from 1500-4000 rpm...pretty good in my view. The performance of 0-60 mph in less than 7 seconds is also impressive for a small displacement base engine, in a truck and the magazine says the turbo 4 cylinder puts out more hp/torque than the 2013 base V8 (4.8 liter) did.

I need to know the MPG , so hope there will some testing soon that reveals these figures.

I will admit that Ford got the ball rolling with small turbo truck engines..so plaudits to FoMoCo...and I'm happy to see this small engine engineering spreading. I find it fascinating and am waiting to find out all the minute engineering details that went into the design and final product of this 2.7 turbo 4.

I feel that engineers don't get the credit they deserve. Here they are, faced with what seemed to be unreasonable demands regarding MPG, power figures, ever tightening emission/environmental rules and regulations regarding the internal combustion engine and the ideas/development /final products they come up with are nothing short of astounding.

Hats off to engineers. Many of us don't realize how they make modern life..better...for the rest of us.



Chevy Turbo 4 cyl.

ShinerBock wrote:

FishOnOne wrote:

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

They will add port injectors like Ford did before particulates filters are added.

While that reduces them at idle and under low load(especially in emission testing scenarios) it doesn't eliminate them once the DI kicks in at mid/high load. If the EPA testing gets more strict(just like it always does) to include these mid/high load scenarios then a PM filter will be needed eventually.

And they'll increase fuel pressure to improve atomization. I doubt we'll see a exhaust filter anytime soon.

FishOnOne wrote:

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

They will add port injectors like Ford did before particulates filters are added.

While that reduces them at idle and under low load(especially in emission testing scenarios) it doesn't eliminate them once the DI kicks in at mid/high load. If the EPA testing gets more strict(just like it always does) to include these mid/high load scenarios then a PM filter will be needed eventually.

parker.rowe wrote:

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

Not really any soot or particulate from a gasser. If you have particulate coming out the tailpipe, you have bigger problems since its probably metal! :)

Actually gasoline direct injected engines are notorious for producing very fine particulate mater. In fact in many cases it is worse due to how fine it is and is small enough to get in the blood stream. Just because you cannot see it like a diesel's soot does not mean there is none coming out.

parker.rowe wrote:

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

Not really any soot or particulate from a gasser. If you have particulate coming out the tailpipe, you have bigger problems since its probably metal! :)

Soot production is normal for a direct injected gas engine.

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

They will add port injectors like Ford did before particulates filters are added.

ShinerBock wrote:
I wonder how long it will be before they put particulate filters on these engines due to how much PM they produce.

Not really any soot or particulate from a gasser. If you have particulate coming out the tailpipe, you have bigger problems since its probably metal! :)

colliehauler wrote:
It's amazing the HP they can get out of these small engines. Not only do they make a lot of power they seem to hold up, hope that's the case with the new GM 4 cylinder. These engines are producing the power of a small V-8 from just a few decades ago.

Or a large one, for that matter! A few DECADES ago big block trucks where hovering around 200 hp.

ramyankee wrote:

Dick_B wrote:
I'd rather have my old 8.1L engine that didn't have to downshift going up the slightest rise when towing.

With you there... I LOVE my 8.1.

I am guessing you two have never driven a turbo vehicle before. They don't hardly downshift either.