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Tag: Komatsu's VGT

Equipment Experts
The inner-workings of Komatsu’s Tier 4 Interim engines
Physics and chemistry dictate that most Tier 4 Interim engines follow a common design formula to reduce emissions. Above 75 horsepower most manufacturers have increased fuel injection pressures, boosted turbos, ramped up exhaust gas recirculation (EGR) rates and added aftertreatment that traps or burns off what the Environmental Protection Agency doesn’t want going out the […]
November 1, 2012
Equipment
The inner-workings of Komatsu’s Tier 4 Interim engines
Physics and chemistry dictate that most Tier 4 Interim engines follow a common design formula to reduce emissions. Above 75 horsepower most manufacturers have increased fuel injection pressures, boosted turbos, ramped up exhaust gas recirculation (EGR) rates and added aftertreatment that traps or burns off what the Environmental Protection Agency doesn’t want going out the […]
November 1, 2012
On Komatsu’s Tier 4 Interim engines emissions reductions are handled by a variable geometry turbo, high pressure common rail fuel injection, cooled EGR and a DPF that includes a diesel oxidation catalyst and a catalyzed soot filter.
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