Concrete Products

JUL 2015

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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www.concreteproducts.com July 2015 • 95 INNOVATIONS REPORT CAT M-SERIES condition of connected Cat products. Prod- uct Link helps lower owning and operating costs, and the system offers daily operations support and information for business deci- sions. Through the solution's detailed asset management, customers can see fuel status, work time versus idle time, and upcoming service needs. Included in M-Series models is a three-year subscription to the web-based VisionLink interface, via cellular or satellite connection, for generating summary reports that assist in effective fleet management. Product Link facilitates M-Series small wheel loader servicing, its Service Mode and Preventive Maintenance Alerts tracking scheduled maintenance. An optional Inte- grated Autolube system allows automatic greasing of linkage pin joints, including bucket pins, articulation hitch, steering cyl- inders, and rear axle trunnions. The diesel exhaust fuid tank is easily accessible on the right side of the machine. M-Series models are compatible with bio-fuel blends up to B20. — www.cat.com/requestCatinfo CLEAN EMISSIONS MODULE M-Series loaders' CEM exhaust treatment package protects interior components, minimizes the aftertreatment footprint and simplifies maintenance. No major redesign was necessary to accommodate this sys- tem into new machines as the space claim required did not change from Cat's Tier 4 Interim design. In order to ensure sufficient NOx reduction, a small amount of excess die- sel exhaust fluid (DEF) is injected into the exhaust stream. It may pass through the Selective Catalytic Reduction (SCR, low- er left chamber) catalyst as ammonia. To prevent excess ammonia from entering the atmosphere, the exhaust gas flows through an Ammonia Oxidation Catalyst (AMOX, top left chamber) where the compound reacts with oxygen in the presence of this catalyst to form nitrogen and water. The Pump Electronics Tank Unit (lower left in schematic) stores, controls and sup- plies the appropriate quantity of DEF from the fluid tank to the injector. The SCR pro- cess uses the DEF to reduce NOx emissions in the exhaust. The SCR consists of a cat- alyst, AMOX, and Pump Electronics Tank. It uses a small amount of DEF to convert NOx emissions in the exhaust to nitrogen and water. DEF is a solution of urea (one part) dissolved in deionized water (two parts). Grades used in Cat engine systems must meet the requirements outlined in the ISO 22241-1 standards. The diesel particulate filter (DPF, top right chamber) prevents exhaust stream particulate matter from release into the atmosphere. The particulate matter, or soot, is trapped inside the DPF until it is oxidized during regeneration. The diesel oxidation catalyst (DOC, lower right chamber) uses a chemical process to reduce hydrocar- bons and carbon monoxide in the exhaust stream. No maintenance is required because the DOC is a "flow-through" device.

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