Deere engines meet emissions standards

Sept. 7, 2011 – John Deere Power Systems is pleased to announce that
three models in their lineup of 75 HP to 174 HP off-highway diesel
engines have been certified as compliant with U.S. Environmental
Protection Agency (EPA) Interim Tier 4, European Union (EU) Stage III B
and California Air Resources Board (CARB) emissions regulations. The
PowerTech PWX 4.5L and PVX 4.5L engines and the PowerTech PVX 6.8L model
below 174 HP join the previously certified lineup of engines above 174
HP.

“Becoming one of the first engine manufacturers to certify engines in
the 75 HP to 174 HP power category provides further
evidence that our emissions-reduction solution is the right technology
right now,” said Doug Laudick, product planning manager for JDPS. “Our
OEMs and customers can be confident that we will deliver not only
emissions compliance, but also the performance, reliability, durability
and low operating costs they expect from John Deere.”

Certified environmentally friendly.

EPA Interim Tier 4 and EU Stage III B emissions regulations begin
January 1, 2012, for 75 HP to 174 HP engines and
require a 90 per cent reduction in diesel particulate matter and up
to an approximate 30 per cent reduction in nitrogen oxide (NOx) from
previous Tier 3/Stage III A requirements. 

John Deere met the challenge of Interim Tier 4/Stage III B regulations
by starting with their proven PowerTech Plus Tier 3/Stage III A engine
platform  – which includes cooled exhaust gas recirculation for NOx
control – and adding an exhaust filter for reducing particulates. Engines in the 75 HP to 174 HP power range will feature full-authority
electronic controls, a four-valve cylinder head, a high-pressure fuel
system, wastegate or variable geometry turbocharging and an air-to-air
aftercooling system.

 “Through rigorous field and lab testing, we ensure that our engines
will meet the unique challenges of off-highway applications — including
extreme vibration, high temperatures and duty cycles — in addition to
new stringent emissions regulations,” Laudick said.

In choosing a solution for Interim Tier 4/Stage III B, John Deere
elected not to use selective catalytic reduction. John Deere’s
cooled EGR and exhaust filter approach provides OEMs and end users a
proven solution with the best total fluid economy. Engines featuring
cooled EGR take a diesel-fuel-only approach, while SCR-equipped engines
utilize both diesel fuel and diesel exhaust fluid to achieve
emissions compliance.

“For Interim Tier 4/Stage III B, it’s important to consider more than
traditional fuel economy, equipment users must take into consideration
total fluid consumption,” said, Geoff Stigler, manager of worldwide
marketing support for JDPS. 

Ratings for the newly certified models include:
    •    PowerTech PWX 4.5L: 85 – 122 HP
    •    PowerTech PVX 4.5L: 125 – 173 HP
    •    PowerTech PVX 6.8L: 140 – 173 HP

Related links
John Deere Power Systems
Tech Tips: Clean Diesel