Equipment World Digital Magazine
Issue link: https://read.dmtmag.com/i/136260
tier 4 | by Tom Jackson TJackson@randallreilly.com Tier 4 news from Bauma The deadlines for Tier 4 Final engines 75 to 750 horsepower kick in next year. So this year all the major engine manufacturers who haven't already declared their intentions, showed their clean-diesel wares in Munich in April. As expected, selective catalytic reduction is on just about everybody's menu, but many manufacturers have also figured out how to do away with the diesel particulate filter and still meet the regs in smaller horsepower ranges. Here's a sampling: Cummins Cummins took the wraps off its QSM12 engine (335 to 512 horsepower), Tier 4 Final version, at Bauma. The sixcylinder powerplant uses high efficiency air handling and advanced combustion technology to reduce emissions sufficient to eliminate cooled exhaust gas recirculation. This makes this engine run up to 40 percent cooler and allowed Cummins to outfit the engine with a wastegate turbocharger. Also launched at Bauma was Cummins QSF3.8 engine (85 to 132 horsepower) with SCR-only aftertreatment. The QSF3.8 reduces particulate matter in cylinder, eliminating the need for a diesel oxidation catalyst or DPF, and reduces the amount of cooled EGR needed for emissions reduction. Volvo Volvo Construction Equipment will primarily use SCR technology as its Tier 4 Final approach, and achieve 5 percent additional fuel efficiency. The company will use SCR in addition to a diesel particulate filter and exhaust gas recirculation developed during Tier 4 Interim. In its Final approach, Volvo will use an updated DPF that operates with advanced electronic control technologies and increased passive regeneration. For engines 75 horsepower and greater, Volvo will use a combination of in-cylinder and external solutions, in addition to SCR. EW0613_Tier 4.indd 35 JCB JCB says its Tier 4 Final Ecomax engines will offer a "one-can" solution, avoiding the use of both a DPF and a DOC. The SCR unit is so compact that it can in many cases take the place of a current exhaust system and fit into existing machine configurations. JCB also says its Tier 4 Final engines will require nearly half of the ratio of urea to diesel – around 3 percent – compared to current SCR engines on the market. The Tier 4 Final engines will also improve fuel savings by an additional 5 percent, and can be recalibrated for sale in less regulated countries. John Deere Power Systems The PowerTech PWL 4.5L engine from John Deere Power Systems will meet Tier 4 Final emissions regulations without the need for a DPF. The engine series runs from 85 to 140 horsepower and uses what the company calls an integrated emissions control system consisting of SCR, a DOC and a cooled EGR. The company also said it will be offering models in the 48 to 74 horsepower range that use a DOC/DPF without SCR or cooled EGR. Engines above 140 horsepower will use the integrated emissions control system. EquipmentWorld.com | June 2013 35 5/29/13 3:08 PM