Collins Bus at Frontlines of Alternative Fuel Technology

By Ryan Gray

With recent statements made by school bus manufacturers that they expect an additional 20- to 30-percent downturn in school bus production this year amid the struggling economy, things seem to be looking up for Collins Bus Corporation. Today's news that company will be bringing to market a propane-powered Type A school bus represents the second first-ever moment for the nation's largest manufacturer of small school buses.

Earlier this year, Collins announced a deal with Azure Dynamics to produce the first-ever, straight-from-the-assembly-line hybrid electric drive train for a Type A school bus. Built for the Ford E-450 cutaway chassis, the NEXBUS hybrid runs on gasoline power and is already in use in Napa Valley (Calif.) Unified School District and at Durham School Services contracts in Rosemead, Calif., in the Los Angeles area.

Following no the heels of the NEXBUS is the yet named liquid propane Type A that company officials said will go into production this fall, likely as of Nov. 1 when the company begins its 2009-2010 production year. Certainly Collins has schematics drawn up, at least, as rumors of a propane-powered small school bus have been making the rounds for a couple of months. Up until now, the only straight-from-manufacturer propane school bus came in the form of Blue Bird's Type C Vision. Blue Bird also manufactures a Type A school bus, the Micro Bird, but so far the company has yet to say it has plans to transition the propane technology to a smaller load vehicle. And, for years, there has been propane conversion kit technology. But recent advances by Blue Bird in solving engine power issues and a partnership with propane distributor and infrastructure specialist CleanFUELS USA, which Collins is also working with, has made the alternative fuel more attractive to fleet owners, not to mention a 50 cent per gallon federal tax rebate and a big investment by the feds and some states.

Speaking of which, Collins is already concentrating on interested school district and private fleet customers in Texas, which has one of the largest propane infrastructures in the nation. The Lone Star state is receiving upwards of $25 million from U.S. Department of Energy Clean Cities grants for new propane vehicles and fueling stations, plus California and New York. And the company has a dealer network of 70 to fall back on.

Amid buzz that GM could go the route of offering a hybrid electric diesel chassis for school buses, but nothing concrete yet, Collins certainly appears to be taking the reigns of the Type A alternative market.

A Link Between High-Performance Race Cars and School Buses?

Perhaps it's all a bit premature, but an intriguing concept was reported last week on Wired.com.

Ilmor Engineering of the U.K. and Plymouth, Mich., owned by Roger Penske, may be known to some as a leading manufacturer of engines for Formula-1 and IndyCar racing as well as high-performance marine racing. But the 25-year-old company is also hoping to revolutionize the combustion engine market amid the global green wave of hybrids. electrics and alternative fuels. It recently introduced a prototype gasoline five-stroke engine, a new take on its 125-year-old, four-stroke cousin.

It's an interesting development in a time when increased fuel economy and reduced emissions are on everyone's list of talking points. But the Ilmor five-stroke actually promises comparable output and fuel efficiency as a diesel engine minus 20 percent of a diesel engine's weight and the nitrogen oxides and particulate matter. Ilmor also says the five-stroke is ready for tests and could be used in conjunction with a hybrid drive.

Says Wired:

...the technology is '100% conventional' [according to Ilmor] and doesn’t require any new manufacturing techniques.

Ilmor says that the prototype five-stroke engine, based on a design by Gerhard Schmitz, has an overall expansion ratio “approaching that of a diesel engine – in the region of 14.5:1.” Along with its light weight and relatively high output, the extra work done in the low pressure (LP) cylinder provides for better fuel economy.

“Running of the concept engine has produced impressive fuel consumption readings over a very wide operating range,” the company said in a statement. “This is because at the onset of knock a greater percentage of work can be extracted in the LP cylinder, giving a degree of self compensation.”

The Mystery of 2010: SCR vs. EGR

This week, both Thomas and IC Bus offer takes on the 2010 emissions regulations coming. In a story that appears elsewhere IC's marketing director argues its EGR solution is better because it's "less hassle"

Looking at both options, we can conclude that even if SCR improves fuel economy and if urea costs come down at some point, then the additional costs of training service techs, storing and purchasing replacement parts for the urea system, and adding a urea infrastructure to your business will add unfamiliarity and costs that are not good for your bottom line.

Thomas Built Buses counters with a Web site about its SCR solution. The company breaks the choice down to a top ten list:

1. Best fuel efficiency
2. Proven technology in Europe
3. EPA recommended and approved
4. Higher engine power density
5. No increased heat rejection, allowing for more efficient combustion
6. Lower cost of total ownership
7. Reliable
8. Durable
9. Easy to service
10.Environmentally friendly

Take a look at both sites for yourself. Let us know what you think. What questions do you still have about SCR and EGR? Let us know and we'll see if we can get them answered for you. Are you ready to make a switch? Have you already committed?