Delay in Emissions Rule

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Truckers Seek Delay in Emissions Rule

The American Trucking Association has asked the U.S. Environmental Protection Agency to delay a mandate requiring new diesel engines to pollute less beginning in October.

In a June 19 petition, the association argued that new studies show that equipment needed to meet the standards would cost much more to buy and operate than EPA estimated, and that engines outfitted with them would be so unreliable as to threaten the nation’s economy. The engines' reliability will be especially threatened, ATA said, if mechanics fail to use the new CI-4 heavy duty engine oils.

A spokesman said the group hopes to put off the regulation, despite the late hour of the petition.

“We think we have a very good, straightforward case,” Mike Russell said. “The engines do not work and they do not meet the requirements of the trucking industry.”

An EPA spokesman said the agency is not yet prepared to comment.

Originally mandated to take effect in the fall of 2004, the new emissions standard would reduce the combined limit on nitrogen oxides and hydrocarbons by 40 percent. The regulation was later accelerated to take effect this year. Most engine manufacturers have indicated they would meet the requirement by installing exhaust gas recirculation systems, although Caterpillar has taken a different approach.

The latest category of heavy-duty diesel engine oil – API CI-4, which was adopted in December – was developed to withstand the higher temperatures and higher soot and acid levels generated by EGR systems.

In its petition, the trucking association cited a draft EPA document, written in January, which estimates that the new emissions regulation will raise costs for new diesel engines by nearly $9,000. That’s more than 10 times greater than the $803 that the agency calculated in 1997 as part of a federal requirement to project costs of new regulations.

The association also cited a May study, commissioned by engine manufacturers, which estimates that the emissions mandate will increase life-cycle purchase and operating costs of engines by $11,057-$15,892. EPA pegged the increase at $907.

“The enormous disparity between EPA’s original cost estimates and the true costs associated with the 2004 rule renders the cost/benefit justification of the rule invalid,” the petition states.

The association claimed that engine reliability will suffer for a variety of reasons. It predicted that some mechanics will use earlier engine oils instead of CI-4 products, leading to engine damage. It also said that engines and other components may suffer from the higher temperatures generated by EGR systems.

Moreover, the association complained that industry has not had normal or sufficient amounts of time for field tests to determine the reliability of EGR-equipped engines.

Finally, it said that trucking companies will incur increased costs due to the lower fuel economy and shorter oil and filter change intervals caused by EGR systems.

The association warned that the regulation could be a blow to the U.S. economy since trucks move 68 percent of the nation’s freight.

A representative from one diesel engine oil supplier said his company neither supports nor opposes the petition.

“My general impression is that the [engine oil] industry is prepared,” said Matthew Ansari, heavy duty automotive manager for ChevronTexaco. “Our company is confident that we can protect EGR engines on the road today. However, our actions are entirely customer driven. If EGR is delayed, operators will still have a better oil for their engines.”

By Tim Sullivan
 
I don't exactly consider myself a treehugger(Look at what I drive) but these are the same kind of arguments the auto industry used to fight emissions controls. It's the precise fuel metering issues pertaining to emissions controls that have given rise to the reliability and economy we have in vehicles today. Many of these same technologies are already being used in the trucking industry for better fuel economy and increased reliability. Why should they not face the same emissions requirements we do?

They are worried about mechanics using the wrong oil? Ok...
 
It has been the more precise fuel metering and hotter engine temps (due to lean-burn technology) that has led to better MPG, not the EGR or the
CATs. CATs restrict exhaust gas flow (reducing HP); EGR's reduce HP by lowering the combustion chamber temps. The only part of the report that seems incorrect is,
"It also said that engines and other components may suffer from the higher temperatures generated by EGR systems." Lower temps maybe, leading to acid build-up.

This part is certainly true.
"Finally, it said that trucking companies will incur increased costs due to the lower fuel economy and shorter oil and filter change intervals caused by EGR systems. "

Here is my complaint: The whole emissions play (with its bogus carbon output per unit of GDP) is political and is not based on any firm science.

And another thing, not long ago the Gov. and other entities asked the diesel engine manufacturers to up the compression ratios and run hotter engines. They did this with a resulting better mpgs. Now, they want to screw with the engine again and lower it efficiency by forcing EGR and CATS.

WHy should any of us be under restrictive emission rules that lead to inefficiencies with mandates, not based on science, but on political whims of inferred, but not proven, greenhouse gasses?????
 
Pulling EGR or the cats does not make a gas engine get better mileage. EGR is also deactivated upon a certain throttle setting so it has no play in WOT and does not reduce power. Pulling the cats generally gives about 2-3% more HP which is not even enogh to be noticeable, seat of the pants. It also usually has a corresponding upward shift in the torque curve, which hurts a vehicle's off the line takeoff. Modern emissions controls are virtually transparent, but from the way people go about diabling them, you'd think this was the bad old days of the 70s and 80s when manufactures did not know how to do it.

Is this different on a diesel?
 
Interestingly enough, EGR can of itself increase gas mileage under optimal conditions. Adding an inert gas into the combustion chamber does not change the air/fuel mixture, but does allow running higher cylinder pressures causing the engine to run more efficiently. It has a similar effect to raising the compression at low throttle openings. I think that if the computers have enough control over the EGR flow that the can use this to help increase steady state, low load mileage.

Ira
 
Ira,

"Interestingly enough, EGR can of itself increase gas mileage under optimal conditions. Adding an inert gas into the combustion chamber does not change the air/fuel mixture, but does allow running higher cylinder pressures causing the engine to run more efficiently. It has a similar effect to raising the compression at low throttle openings. I think that if the computers have enough control over the EGR flow that the can use this to help increase steady state,
low load mileage."

The problem is, the gas EGR recycles not an inert gas, but gasses of various hydrocarbons., and the situation of EGR control is hardly optimal. The fuel increase you speak of is measured in BSFC, which is about 0.5 to 1.0%. The problem is, there is a very narrow range of BSFC.

There two other effects of Exhaust Gas Recycle:
1. More Hydrocarbon (HC) emissions are created when the EGR is in operation. An endless cycle of "shooting yourself in the foot in order to run faster!"
2. The effective compression ratio is reduced.

Try this. Plug the EGR vacuum line or terminate the EGR electrical connection and drive up
and down hills. Here is what you will observe - little to any downshift as compared to before.
Why? The engine is creating more horsepower so the tranny doesn't have to downshift.
 
I've had cars with the EGR system non-functional, and they always run better with it hooked up. Never noticed a power difference.

One thing interesting; the more "radical" a cam is, the more built in EGR it has, from overlapping the valves. On LT1s, You can pull the EGR when the more radical cams are installed and still pass emissions.

My Ciera 3.3 V6 had no EGR or AIR system. The camshaft provided enough overlap to give the EGR and O2 for the cat.
 
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