Tier IV Technology
Komatsu Interim Tier 4 Engine Technology
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:
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