The PM-Metalit: A PM control technology for Tier 4 Off-Highway Applications

Krämer, Jan; Pfahl, Ulrich; Bruestle, Claus; Diewald, Robert; Hunter, Gary L.

doi:10.4271/2009-01-2838

Cited by 11 publications

(3 citation statements)

References 7 publications

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“…In addition to the use of an oxidation catalytic converter, a PM-Metalit is used to reduce the particulate emissions from the engine. The PM-Metalit is a partial-flow particulate filtration device that is continuously and passively regenerated, that has been in use in many OEM and retro-fit applications since 2004 [7]. be implemented for the SCR catalyst.…”

Section: Figure 5 Internal Design Of Longitudinal Structurementioning

confidence: 99%

Pre-Turbo Aftertreatment Position for Large Bore Diesel Engines - Compact & amp; Cost-Effective Aftertreatment with a Fuel Consumption Advantage

Subramaniam¹,

Hayes²,

Tomazic³

et al. 2011

SAE Int. J. Engines

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Tier 4 emissions legislation is emerging as a clear precursor for widespread adoption of exhaust aftertreatment in offhighway applications. Large bore engine manufacturers are faced with the significant challenge of packaging a multitude of catalyst technologies in essentially the same design envelope as their pre-Tier 4 manifestations, while contending with the fuel consumption consequences of the increased back pressure, as well as the incremental cost and weight associated with the aftertreatment equipment. This paper discusses the use of robust metallic catalysts upstream of the exhaust gas turbine, as an effective means to reduce catalyst volume and hence the weight and cost of the entire aftertreatment package. The primarily steady-state operation of many large bore engine applications reduces the complication of overcoming pre-turbine catalyst thermal inertia under transient operation. Upstream placement of the catalyst packages also offers potential for reducing the overall fuel consumption penalty (associated with the use of aftertreatment) in comparison to the conventional post-turbine placement. This softening of the fuel consumption penalty can be attributed to better light-off and performance of catalyst substrates, as well as a reduction in the impact of aftertreatment pressure drop on engine pumping work. The investigation involved numerical simulation of pre-turbo application of a diesel oxidation catalyst (DOC), partial-flow diesel particulate filter (DPF), and selective catalytic reduction (SCR) catalyst on a 30-35L class diesel engine. The effect of this placement over traditional downstream placement in terms of fuel consumption, package size, weight and cost was examined. The investigation revealed that the inherently higher gas density in the pre-turbine location allows a dramatic reduction in catalyst volume of up to 70%. The fuel consumption penalty associated with the addition of aftertreatment can also be reduced by approximately 1% with upstream placement of the catalyst packages.

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Section: Figure 5 Internal Design Of Longitudinal Structurementioning

confidence: 99%

Pre-Turbo Aftertreatment Position for Large Bore Diesel Engines - Compact & amp; Cost-Effective Aftertreatment with a Fuel Consumption Advantage

Subramaniam¹,

Hayes²,

Tomazic³

et al. 2011

SAE Int. J. Engines

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“…The PM-Metalit is a partial-flow particulate filtration device that is continuously and passively regenerated, that has been in use in many OEM and retro-fit applications since 2004. [7] Like all Emitec substrates, the PM-Metalit is constructed of alternating layers of flat and corrugated layers as seen in…”

Section: Aftertreatment System Componentsmentioning

confidence: 99%

Large Engine Aftertreatment in a Pre-Turbine Position: A Path to Compact and Cost-Effective Emissions Reduction

Downey¹,

Bruestle²,

Tomazic³

et al. 2010

ASME 2010 Internal Combustion Engine Division Fall Technical Conference

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With the impending implementation of the Tier 4 emissions standards in the non-road and locomotive sectors, exhaust gas aftertreatment systems will be needed on applications that previously did not require it. Based on the fact that the displacement of these engines is very large, the aftertreatment systems will also be relatively large, heavy and expensive. Additionally, even in these large engine applications, packaging space and systems cost is at a premium. Placing a robust metal aftertreatment system up-stream of the turbo-charger offers an elegant solution to these issues. The higher temperatures and faster temperature rises before the turbine yield faster light-off and better emissions performance. The higher gas density allows the total size of the aftertreatment system in the pre-turbine position to be substantially smaller for a given conversion efficiency, leading to a remarkable packaging and cost benefit of up to 64%. Additionally, by placing the flow-restriction of an aftertreatment system upstream of the turbine, a fuel consumption benefit in the pre-turbine position can be realized as pumping losses of the engine are reduced. The largely steady-state operation of these large engines negates the heat sink effect of the pre-turbine catalytic converters in transient operating conditions. This paper will investigate the benefits of placing an oxidation catalytic converter and partial-flow particulate filter up-stream of the turbo-charger on the fuel consumption of a stationary engine in the 30–35L class by simulation with GT-Power. Different locations for the aftertreatment package as well as optimized sizing for the different locations are investigated to identify the optimum solution for the engine. In addition to the fuel consumption benefits, the cost and weight advantage of the smaller pre-turbine system is emphasized. This view of both the technical and commercial side of the applications, demonstrates a clear advantage for the pre-turbine arrangement of the metal emissions reduction components on large bore engines.

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“…These characteristics lead to less constraints and complexity in terms of filter maintenance and usage which make the PFF an attractive solution to complement and assist the main DPF. Partial flow filters have already been studied as a retrofit solution for heavy duty vehicles [6][7][8] or possibly fitted in gasoline direct injection (GDI) engine exhaust as a solution for future legislations that impose a limit on particulate mass and number [3,9]. It was also presented as a possible hydrolysis catalyst, positioned upstream of an SCR catalyst [10,11].…”

Section: Introductionmentioning

confidence: 99%

The Use of a Partial Flow Filter to Assist the Diesel Particulate Filter and Reduce Active Regeneration Events

Lefort¹,

Herreros²,

Tsolakis³

2014

SAE Int. J. Engines

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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The PM-Metalit: A PM control technology for Tier 4 Off-Highway Applications

Cited by 11 publications

References 7 publications

Pre-Turbo Aftertreatment Position for Large Bore Diesel Engines - Compact & amp; Cost-Effective Aftertreatment with a Fuel Consumption Advantage

Pre-Turbo Aftertreatment Position for Large Bore Diesel Engines - Compact & amp; Cost-Effective Aftertreatment with a Fuel Consumption Advantage

Large Engine Aftertreatment in a Pre-Turbine Position: A Path to Compact and Cost-Effective Emissions Reduction

The Use of a Partial Flow Filter to Assist the Diesel Particulate Filter and Reduce Active Regeneration Events

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