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C a t e q u i p s e v e r y S t a g e I V / T i e r 4 f engine with a combination of electronic, f u e l , a i r , a n d a f t e r - t r e a t m e n t c o m p o - nents based on engine size, the type of application, and the geographic location in which it will work. The technologies offered include a diesel oxidation cata- lyst (DOC), diesel particulate filter (DPF) and selective catalytic reduction (SCR), with a "No DPF" after-treatment package available for some applications. "As we designed our Stage IV/Tier 4 Final engines, we did so with the end in m i n d i n o r d e r t o m a k e i n t e g r a t i o n a s s i m p l e a s p o s s i b l e f o r o u r O E M c u s - tomers," said Mike Reinhart, Caterpillar industrial marketing manager. "We've been able to meet emission legislative standards while delivering value to our c u s t o m e r s . A s a r e s u l t , w e h a v e t h e strongest, most complete product range available for customers and manufactur- ers looking for a robust, fuel-efficient industrial engine solution." The larger engines on display were the C13 and C18 ACERT units. The C13 is a 6-cylinder, 12.5-liter engine that deliv- e r s 2 8 7 – 3 8 8 k W ( 3 8 5 – 5 2 0 b h p ) , a n d i s u s e d i n a w i d e v a r i e t y o f a p p l i c a t i o n s such as crushing, drilling, materials han- dling and pumps. Meanwhile, the C18 industrial engine is a 6-cylinder, 18.1- l i t e r u n i t t h a t i s s i m i l a r l y s i z e d t o i t s Stage IIIB/Tier 4i predecessor, with twin DOCs fitted to the 563–597 kW (755–800 bhp) ratings to comply with Tier 4f emis- sion standards, Cat said. Volvo Penta: Underground Mining Range Swedish specialist engine manufacturer Volvo Penta aims to release its full line of Tier 4f-compliant industrial engines this year, as well as its new automatic start/stop technology. Volvo Penta has focused specifically on SCR technology to meet Tier 4f re- quirements, with the added advantage that by doing so, it makes life easier for a l l t h e e q u i p m e n t m a n u f a c t u r e r s a l r e a d y e m p l o y i n g t h i s t e c h n o l o g y . David Hanngren, the company's man- a g e r f o r i n d u s t r i a l p r o d u c t p l a n n i n g , said, "With our new Tier 4 Final engine range, we will meet our customers' pri- mary objectives: no regeneration, limit- ed installation challenges, continuous o p t i m i z e d f u e l c o n s u m p t i o n a n d l o w operating costs. With as few and as sim- ple changes as possible, we aim to make our customers' job as easy as possible. This is probably the best EGR system in the world." This "light" EGR system not only pro- vides further emission reductions but also helps to keep the SCR catalyst oper- ating at an optimal temperature, Volvo Penta noted, while installation is greatly simplified by avoiding a costly DOC. Volvo Penta will be offering a range of five basic Tier 4f-compliant engine plat- forms. Sharing a common design con- cept to ease OEM design and installation, they will include 5-, 8-, 11-, 13- and 16- liter units, covering a power output range from 105 to 515 kW (141–690 hp). In the meantime, the company cur- rently offers an 18-model range of engines approved for underground mining appli- cations: nine compliant with Tier 2 and nine with Tier 4i. Power outputs range from 224 to 522 kW (300–700 hp), with all of the Tier 4i-compliant units using SCR technology. Volvo Penta points out since they require a ventilation rate of around 30 cfm/hp, these deliver the maximum ventilation rate available for a convention- al diesel engine, helping to cut ventilation volumes and costs. As the company noted, while Tier 4f represents a major step forward, the pro- cess of lowering emissions in off-road engines is far from over, with more strin- gent regulations in the pipeline. At the moment, there is a clear divide between those parts of the world where emissions c o n t r o l i s t i g h t l y r e g u l a t e d a n d t h o s e where older standards still apply. As a result, manufacturers have to be able to offer engines that meet the requirements of each individual market, regardless of whether or not that is the most efficient use of manufacturing resources. If nothing else, what the phased intro- duction of increasingly tight emission- control requirements has done is drive the world's engine companies to greater i n g e n u i t y i n t e r m s o f t h e t e c h n o l o g y being applied. And, at the end of the day, b e t t e r f u e l e f f i c i e n c y a n d i m p r o v e d working conditions can only be of bene- fit to mining companies and the individ- ual alike. d i e s e l e n g i n e s c o n t i n u e d 54 www.coalage.com June 2014 Volvo Penta's mid-range diesel lineup will offer automatic start/stop capabilities. (Photo courtesy of Volvo Penta) Cat C7.1. (Photo courtesy of Caterpillar) CA_pg49-55_V3_CA_pg46-47 6/17/14 4:42 PM Page 54