PortalForum Chapter Minutes Southern Tier Minutes May 12, 2009

Summer Seminar Information

May 12, 2009

Moderator: harlanpudneyjr

Post 13 May 2009, 12:41

Posts: 30
Location: 1315 route 96 owego N.Y. 13827

Southern Tier Chapter
Head Mechanics Association

• Meeting held at Johnson City Transportation Department.
• In Attendance: Rick Crowe (WPCSD) / Bob Carey (NYSDOT) / Mark Kozina (UECSD) / Gary Ingraham (SVCSD) / Joe Gokey (Birnie Bus @ CFCSD) / Tyler Stoddard (Birnie Bus @ CFCSD) / Bill Hawk (WCSD) / Ray Lindquist (WCSD) / Ron Zielewicz (MECSD) / Bob Risoli (JCCSD) / Cliff Halliday (OACSD) John Johnston (NYBS) / George Darling (NYBS)
• Rick introduced John Johnston of New York Bus Sales as this month’s speaker. John began his presentation by explaining our topic of discussion as “Cummins Engine Technology Today and into 2010”. John went on to explain briefly the history of Cummins itself. Cummins has been in business since 1919 & is currently the largest independent manufacturer of diesel engines. Cummins produces engines for both on highway and off highway use, including generator sets, the boating industry, etc. Cummins also builds their own engine components including turbo-chargers, injectors, fuel and exhaust systems, engine electronics, etc. Cummins has global capabilities and resources with facilities in 10 countries around the world.
• Cummins engines will be certified by the U.S. Government and meet EPA NOx standards for 2010 use, in December of this year.
• Cummins markets its ISB 6.7L, ISC 8.3L, and ISL 9L engines for use in the School Bus industry. These engines are the quietest diesel engines currently on the market .This has been accomplished by a redesign of the engine and moving all engine gear timing and driven accessories to the rear of the engine, this includes the air compressor. The results are an 80% reduction in engine noise.
• The ISB engine uses a variable geometry turbo-charger (which can be used as an exhaust brake), high pressure common rail fuel system, open crankcase vent w/coalesting type filter, and improved cooling systems. These engines also designed to use DEF (diesel exhaust fluid). This is a mixture of Urea and deionized water.
• Cummins exhaust systems utilize a DPF (diesel particulate filter) upon exiting this the exhaust gases are then routed through a Decomposition Reactor (this is where the DEF is injected into the exhaust stream by means of a doser) then it’s on to the SCR for (selective catalyst reduction). This process breaks down the NOx molecules turning them (by way of chemical reaction within the catalyst) into harmless water molecules and nitrogen. This is then released by way of the tail pipe into the atmosphere. This will have no adverse affects on engine performance. In fact Cummins claims best fuel economy in its class.
• John went on to explain that DEF is a non-toxic, non-polluting and non-flammable liquid. DEF will freeze at 11 degrees however not to a solid state and will not affect cold weather start up. DEF will be consumed at a rate of not more than 2% ratio to fuel and will be held in its own tank of a 10 gallon capacity.
• Currently there are 45,000 SCR engines running in the U.S. and over 200,000 operating in Europe. This technology has been proven. This brought NYBS presentation to a close at which time chapter business was discussed.
• Rick has concerns (as did others) with premature tire wear of his Michelin steer tires and met with a Michelin Rep. to discuss the concern. Rick will keep us posted on the situation.
• This brought our meeting to a close at approximately 11:45. Our next meeting is scheduled for Tuesday June 9th. 10am at JC’s Transportation Dept. I hope everyone can make it, see you then.

Cliff Halliday
Southern Tier Chapter

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