New Holland Agriculture and Fiat Powertrain Launching Tier4 Tractors Based on SCR Technology

Diagram of the New Holland T7 engine and SCR system. Click to enlarge.

Together with its engine development partner, Fiat Powertrain Technologies, New Holland is introducing a range of Tier 4A compliant engines, based on Selective Catalytic Reduction (SCR) technology, which reduce fuel consumption and running costs; and improve power output (7%) and torque (13% on the T7.270) and engine response time.

By the beginning of 2011, New Holland will launch more Tier 4A compliant engines, with twenty tractors and six combine harvester models and will use only SCR technology to meet Tier4 Final regulations.

New Holland T7 tractor. Click to enlarge.

Current Tier 3 engines emit 60% less particulate matter (PM) and nitrogen oxides (NOx) than their Tier 1 counterparts. With the introduction of the stringent Tier 4A emissions regulations (also referred to as Tier 4 interim), PM will be reduced by a further 90% and NOx by 50% over Tier 3 levels. In real terms, this means that a farmer can work almost 100 days with a Tier 4A machine, and produce the same level of emissions as just one Tier 1 machine would have in a single day.

The Tier 4A regulations come into force for products with engines over 174 hp (130 kW) in January 2011, and New Holland will use selective catalytic reduction (SCR) technology for all machines producing more than 100 hp. The advanced SCR engine solution was developed in partnership with Fiat Powertrain Technologies, which has already produced more than 150,000 proven SCR engines.

The Tier 4A compliant SCR engines have significant environmental and productivity advantages.

SCR technology improves engine breathability, as the powerplants breathe clean fresh air instead of hot, dirty, recirculated smog to ensure optimal combustion conditions. This results in increased maximum power and higher torque for improved machine performance. Moreover, the SCR technology uses an after treatment system located in the exhaust to neutralize the harmful emissions, so the engine is 100% dedicated to generating power. This means that farmers and contractors have more performance enhancing power available to improve the efficiency of their businesses.

—Pierre Lahutte, Head of Global and European Communications and Marketing

Early tests indicate that New Holland’s solution will offer class-leading fuel consumption in the T7 segment, in which it has already established itself as a fuel efficiency leader.

As a direct result of using SCR technology to conform to Tier 4A standards, these machines will benefit from an increased Engine Horsepower Management (EPM) band, up to 71 hp on some models in the T9 range. The EPM technology continuously adjusts engine output to working conditions by an intelligent sensing of the PTO, hydraulic and transmission loads. This enables optimal generation of power by the engine, which also always runs at the most efficient settings.

The SCR system requires the use of AdBlue, a non-toxic water and urea solution. New Holland will help its customers to adopt the SCR technology during the transitional period by delivering a 1,000 liter AdBlue tank together with an electrical pump free of charge. All New Holland authorized dealers will also stock all products required to ensure conformity with new Tier 4A regulations, including AdBlue, in containers of varying sizes in order to suit individual farmers needs.

New Holland will use SCR technology to reach the even more stringent Tier 4B emissions norms which will be phased in from 2014 onwards for the entire product range.

T7.270 Tier 4A SCR vs. previous T7070 Tier 3 model
 Tier 3Tier 4A SCRImprovement
Max EPM hp 185 kW/252 hp 198 kW/269 hp +7%
Torque 1025 N&iddot;m 1160 N&iddot;m +13%
Torque backup 32% 40% +25%
EPM band 19 kW/27 hp 30 kW/41 hp +52%
Fuel consumption 289 g/kWh 261 g/kWh -10%

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