A Letter from the President of IC Bus While you have many options for which bus you are buying today, in 2010 you will be faced with two very clear engine choices: MaxxForce® Advanced EGR from IC Bus or urea fluid-based SCR, from all other North American bus manufacturers.
A Letter from the President of IC Bus While you have many options for which bus you are buying today, in 2010 you will be faced with two very clear engine choices: MaxxForce® Advanced EGR from IC Bus or urea fluid-based SCR, from all other North American bus manufacturers.
IC Bus will meet 2010 EPA emissions requirements for oxides of nitrogen (NOx) with MaxxForce Advanced EGR (Exhaust Gas Recirculation).
Regards,John McKinney
President
IC Bus |
As you may know, all on-highway diesel engines sold in the United States and Canada since 2007 use some form of EGR. EGR re-circulates NOx exhaust into the intake stream, where it displaces some of the normal intake. This slows and cools the combustion process, reducing NOx formation. MaxxForce Advanced EGR takes EGR even further, thanks to four unique technological innovations only offered in 2010 MaxxForce engines:
•· Next-generation fuel injection systems deliver fuel into the cylinders multiple times per cycle and at higher pressures. This means combustion takes place over a longer period and is more complete, resulting in creation of lower NOx.
•· Proprietary combustion bowl design combines with the higher fuel injection pressure to break the fuel up into a finer mist that is spread more evenly inside the cylinder. This results in a more complete and cleaner burn.
•· Advanced air management systems place an interstage cooler between dual turbochargers. This reduces air temperature going into the cylinders and allows more air to be packed into the large second-stage turbo for maximum power at high engine speeds. Combining these features with the increased EGR rate means the combustion in the cylinder occurs slower and at a lower temperature, generating less NOx.
•· Electronic calibration, supported by increases in computing power, replaces pre-programmed lookup tables and allows engine controllers to continuously calculate the optimum fuel-air mix for maximum power and efficiency.
The result of these innovations is an engine that treats NOx in-cylinder, and therefore requires no additional aftertreatment - and no extra burden on our customers.
Alternatively, our competitors will add an aftertreatment system based on SCR (Selective Catalytic Reduction) using urea fluid. SCR comes with the complication and cost of a new aftertreatment system and urea fluid maintenance and training.
IC Bus did not want to put the hassle of urea on bus operators' shoulders. So, by using Advanced EGR, IC Bus takes the burden of compliance off customers with technology advancements that we have been working on for years. Because of these advancements, you can chose an IC Bus with a MaxxForce Advanced EGR engine and avoid dealing with the burdens of urea fluid-based SCR.
Bottom line: IC Bus thought about 2010 emissions so that you wouldn't have to.