Will Meet US EPA Non-road Tier 4 Interim Emission Regulations
Rolling Meadows, IL, April 6, 2010 — Komatsu America Corp. is pleased to announce the introduction of its new diesel engine that features the next generation of engine technology designed to meet US EPA non-road Tier 4 interim emission regulations.
Based on Komatsu proprietary technologies developed over many years, the new diesel engine reduces exhaust gas particulate matter (PM) by more than 90% and oxides of nitrogen (NOx) by more than 45%--when compared to current Tier 3 levels--while still consuming less fuel1.
Komatsu’s Tier 4 engine technology includes:
- Newly designed variable geometry turbocharger
- Newly designed DPF (diesel particulate filter)
- Heavy duty HPCR (high-pressure common rail) fuel injection system
- Larger more robust cooled EGR (exhaust gas recirculation) system
- Redesigned combustion chamber at top of piston
- Harmonized engine and machine interface by electronic control system
Komatsu has integrated this Tier 4 technology into construction and mining engines ranging in size from 3.3- to 46-liter2. Through Komatsu’s in-house development and production of engines, hydraulic units, control systems and major components, the company has attained exceptional machine performance under a variety of operating conditions. Komatsu customers have come to expect outstanding quality and performance, and these Tier 4 powered machines are designed to meet customer expectations while improving the environment and fuel consumption.
1. Variable Geometry Turbo System
A newly designed variable geometry turbocharger features Komatsu
proprietary technology that varies the air-flow and delivers optimum air
quantity to the engine combustion chamber under all speed and load
conditions. The result is cleaner exhaust gas and improved fuel economy
while maintaining power and performance.
2. Diesel Particulate Filter
Komatsu has designed and developed a high efficiency diesel particulate
filter that captures more than 90% of PM. Passive and active
regeneration is initiated automatically by the engine controller as
needed to burn the particulates while the engine is running allowing
uninterrupted machine operation. A special oxidation catalyst with fuel
injection system eliminates the need for a traditional fuel burner
thereby reducing maintenance costs and increasing reliability.
3. Heavy Duty HPCR(High-Pressure Common
Computer controlled heavy duty HPCR system delivers a precise quantity
of pressurized fuel into the engine combustion chamber using multiple
injections to achieve complete fuel burn and reduce exhaust emissions.
Fuel injector life has been improved through the use of ultra-hard wear
resistant materials such as diamond-like carbon.
4. Heavy Duty Cooled EGR (Exhaust Gas
Cooled EGR, a technology well-proven in existing Komatsu engines, has
increased capacity to further reduce NOx to Tier 4 levels. Larger more
robust components ensure reliable performance during the demanding work
conditions of construction equipment.
5. New Combustion System
The fuel/air combustion chamber located at the top of the engine piston
has a new shape designed to improve combustion and further reduce NOx,
PM, fuel consumption and noise.
6. Electronic Control System
The engine and machine work equipment function in harmony as the
electronic control system performs high-speed processing of information
from sensors throughout the machine. The result is reduced fuel
consumption, noise, NOx and PM.
Komatsu America Corp. is a U.S. subsidiary of Komatsu Ltd. which is the world’s second largest manufacturer and supplier of construction, mining and compact construction equipment. Komatsu America also serves forklift and forestry markets. Through its distributor network, Komatsu offers a state-of-the-art parts and service program to support the equipment. Komatsu has proudly been providing high-quality reliable products for nearly a century. Visit the website at www.komatsuamerica.com for more information.
1 All comparisons are to Tier 3 diesel engine emission regulations.
2 Including some engine models which are jointly developed and manufactured by Cummins Inc.