Curt Bennink

Curt Bennink is a former editor of OEM Off-Highway magazine.

Collaboration stretches R&D resources

Danfoss' Application Development Center addresses industry demand on OEM research and development departments.

Wheel loaders designed for operators

Current designs strive to optimize the operator environment

The search for efficiency

Diesel engines gain efficiency through downsizing and downspeeding.

Cummins' aftertreatment device combines the Cummins Compact Catalyst with Selective Catalytic Reduction (CCC-SCR).

The unwanted aftertreatment

A study by Manfredi & Associates investigates how emissions regulations will change how equipment is purchased and sold.

As with the Stage IIIB/Tier 4 Interim Ecomax engine, it will be possible to de-tier the Tier 4 Final range, to allow customers to sell used equipment in less regulated territories. All JCB dealers worldwide will have the technology to remove the SCR kit, reduce the fuel injection pressures and recalibrate the engine control system to de-tier the Ecomax engines. A lubricity doser may be required in some countries depending on the quality of local fuel.

Take careful aim at a custom engine powerband

Bobcat shares details of Tier 4 engine technology using Ultra-Low Particulate Combustion to eliminate the DPF.

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Plot fuel roadmap to the future

Ricardo recently demonstrated a flywheel system on an excavator that reduces initial cost and provides a shorter payback period.

Engineering & Manufacturing

Paradigm shifts present engineering challenges

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The trend toward higher power densities

Tier regulations have pushed for more advanced engine technology and optimized systems, the rewards of which are more power from smaller engines.

In engines of similar or same displacement, the main factors that contribute to an increase in specific power are: utilization of more complex-structure turbochargers, such as variable-geometry or dual-stage; an increase in peak cylinder pressure and the use of an SCR-only aftertreatment system without any recycling of exhaust gas in cylinder, especially in engines with a displacement higher than four liters.

Design integration steps up the game

Systems integration enables OEMs to provide customized features and capabilities for improved productivity and efficiency.

'Nothing takes the place of having all of your design engineers sitting around the table and the engineer who is producing the axle knows exactly what the transmission engineer [is] going to do and the engineer who designs the engine knows what the peak torque needs to be,' says Doug Phillips of Volvo CE.

Investigate final Tier 4 options

Most manufacturers have moved to high-pressure common rail fuel injection systems, such as the one visible on this QSF2.8 engine that pumps out 49 to 74 hp.

Leave nothing to waste

Hybrid technology captures and reuses energy that is normally wasted.

The 336E H captures the swing brake energy with a hydraulic accumulator. That energy is then used to accelerate the excavator upper structure back in the opposite direction.

Fuel Tanks & Systems

Natural gas charges into the future

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