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Liebherr selects Eminox for Stage V support

Liebherr has teamed up with Eminox to meet more stringent European emission standards.

The OEM has awarded the emissions specialists based in Gainsborough in the UK the contract to assist it in developing and manufacturing Stage V-ready exhaust aftertreatment systems.

The low- and high-power engines (LPE and HPE) are due to arrive in the market in 2019. Eminox has been a supplier for Liebherr for a number of years providing silencers, pipework and spark arrestors and supported the OEM in meeting Stage IV standard after treatment systems.

Mark Runciman, operations director for Eminox, said, “Eminox is continuing to expand its OE business and we are thrilled that Liebherr has continued to trust in our development and manufacturing expertise.”

The Stage V approach incorporates advanced exhaust aftertreatment technologies including selective catalytic reduction (SCR) on Filter technology, a diesel particulate filter (DPF) coated with SCR. Liebherr pioneered this technology under the brand name Liebherr SCR filter, already at Stage IV, to produce a range of machines to meet strict local emissions requirements for countries such as Switzerland.

This was one of the key building blocks which Eminox used to develop a compact range of EATS variants for the Liebherr Stage V solution, packaged within an almost identical space envelope.

Different inlet and outlet modules in different orientations will cover eight different engines and more than 140 separate machine types, with LPE engines ranging in power from 230 – 330kW and HPE engines from 330 – 505kW.

Tried and tested
The Stage IV option solution has already been tested and met Stage V emissions levels. So, this concept was developed with limited changes to become the solution for LPE. HPE ranges present additional challenges in terms of packaging – a linear system, as developed for LPE, would not fit the available space envelope and meet the backpressure target.

The solution involved developing a twin system, which will mean it can be integrated into a wide range of existing machines without re-design. The mixing process in these configurations requires careful design utilizing Eminox’s specialist mixing expertise and CFD evaluation.

The success of the forward-thinking approach to Stage IV and collaborative working relationship built up during the development were the main reasons why Eminox was selected as a development partner for the Stage V solution.

Eminox used its in-house prototyping, testing and development tools for optimizing the Stage V solution for Liebherr. These include advanced CFD (computational fluid dynamics), FEA (finite element analysis), FMEA (failure mode effect analysis), and NVH (noise vibration and harshness) analysis.

Volume manufacture of Liebherr’s Stage V solution will begin in 2018.

October 13, 2017

Written by James Allen


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