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Dust, heat and thin, high-altitude air: those were the extreme conditions under which MTU
has been testing out technologies for Tier 4 mining engines.
Tier 4 test for mining engines
From 2015, diesel engines for monster dump trucks and excavators will have to meet
the Tier 4 requirements specified by the US Environmental Protection Agency, EPA.
To make sure they do not consume any more fuel than the current models despite
producing lower emissions, MTU has been testing out a Series 4000 prototype. In
mining especially, it is a major challenge to convert the engines, as the components
are subjected to such extreme stresses in those conditions. “To maintain the
fuel consumption levels of the existing models despite massive reductions in emission
levels, we have had to substantially increase the cylinder pressure,” explains
Dr. Ingo Wintruff, development project manager for the new generation of the Series
4000 and head of applications technology at MTU. He points out that the high cylinder
pressures represent a serious challenge for the crankcase, pistons and cylinder
heads, especially under the tough conditions in mining.
The testing ground was the largest copper mine in the world – Chuquicamata in
the north of Chile. Its unique load profile and the atmospheric conditions at 3,200
meters above sea level enabled the MTU technicians to test the technologies to their
limits. “If the systems work successfully on the engines here, they will do so almost
anywhere else in the world,” elucidates Norbert Eisenblätter, Senior Manager Global
Application Engineering Surface Mining at MTU.
The Katana 65 harvester is equipped with an MTU Series 502 engine
with 650 hp.
Harvester premiere
Most powerful in its class
An MTU Series 500 engine makes the new all-terrain crane
from Manitowoc the most powerful in its class. The MTU
Tier 4i-compliant power unit is capable of 405 kilowatts.
With the aid of an SCR system, the engine meets the requirements
of the US Environmental Protection Agency’s Tier 4i
emission limits. The GMK6400 6-axis mobile crane has a lifting
capacity of 400 tonnes and a boom length of 60 meters.
The Series 500 engines are based on Mercedes-Benz commercial-vehicle
power units and are designed by MTU specifically
for C&I applications. In addition, they use as much as
5 percent less fuel than the previous generation. The SCR
technology enables the vehicle manufacturers to convert
their products to Tier 4i compatibility with the least possible
complexity.
Ready for Tier 4i: The new crane fromManitowoc is powered by a
model 8V 502 C52 engine.
Tractor manufacturer Fendt, part of the Agco Group, has launched its first ever forage
harvester. Designated the Katana 65, it is also the first Fendt product with an MTU
engine. A 650-bhp, eight cylinder Series 502 engine provides the harvester with a top
speed of 40 kilometers per hour on the road and delivers ultra-economical operation
in practical service in the field. Its SCR system ensures that the engine meets the
European EU IIIB and American EPA Tier 4i emission standards. It also guarantees low
fuel consumption combined with high performance. Named after a sharp-bladed Japanese
samurai sword, the harvester is designed to deliver a precise and efficient cut. Its
enclosed cutter drum with a diameter of 720 millimeters is the largest on the market at
present. Twenty-five units are expected to be produced over the coming year.
MTU Report 02/11 I 19