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Integrated Noise and Dust Reduction

KOBELCO’s iNDr (Integrated Noise & Dust Reduction Cooling System) is an innovative technology designed to significantly reduce engine noise and help prevent dust intrusion in excavators. This system creates a “wind pathway” by enclosing the engine and cooling components within a duct that connects the air intake to the exhaust outlet. By offsetting the fan and positioning it deeper inside the machine, sound waves are forced to reflect off multiple internal surfaces, diminishing their energy before they can escape. This design achieves a substantial noise reduction, with some models operating at levels as low as 93 dB(A) externally and 65 dB(A) within the cabin, surpassing standard regulatory requirements.

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In addition to noise suppression, the iNDr system enhances engine reliability by incorporating a high-performance filter at the air intake, effectively trapping dust and preventing it from entering the engine compartment. This results in a cleaner engine environment, improved cooling efficiency, and reduced maintenance needs. The iNDr system was first introduced in 2007 and has since been implemented in various models, particularly those used in urban construction sites where low noise and minimal dust are critical.

Key features

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Noise Reduction

The iNDr system incorporates advanced soundproofing techniques, including a tightly sealed engine compartment and a streamlined air intake design, to significantly reduce operating noise. This makes KOBELCO machines among the quietest in their class, ideal for urban and residential job sites.

INDR dust control

Dust control

iNDr uses a high-performance, fine-mesh filter in the air intake to trap dust and debris before it enters the engine compartment. This not only protects the engine and cooling systems but also simplifies maintenance by keeping the internal components cleaner for longer.

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Ease of maintenance

The iNDr filter is easy to access and clean, making routine maintenance more efficient and less time-consuming.

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