6068HFG08 6.8L Generator Drive Engine

6068HFG08 6.8L Generator Drive Engine

Overview

  • PowerTech™ PVS
  • Standby: 150-180 kW (200-241 hp) @ 1800 rpm
  • Prime: 136-164 kW (182-219 hp) @ 1800 rpm
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Features

Features

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Variable geometry turbocharger (VGT)

  • Varies exhaust pressure based on load and speed to ensure proper EGR flow. The combination of the cooled EGR and VGT provide low-speed torque, quicker transient response, higher-peak torque, and world-class fuel economy.

Cooled exhaust gas recirculation (EGR)

  • EGR cools and mixes measured amounts of cooled exhaust gas with incoming fresh air to lower peak combustion temperatures, thereby reducing NOx.

Exhaust filters

  • This system is the Best Available Control Technology (BACT) for particulates that delivers premium block load acceptance characteristics and utilize a catalyzed exhaust filter that contains a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF). The DOC reacts with exhaust gases to reduce carbon monoxide, hydrocarbons, and some particulate matter (PM). The downstream DPF traps and holds the remaining PM. Trapped particles are oxidized within the DPF through a continuous cleaning process called passive regeneration. Passive regeneration occurs during normal operating conditions when heat from the exhaust stream and catalysts within the exhaust filter trigger the oxidation of the trapped PM. If passive regeneration cannot be achieved due to low temperature, load, or speed, then PM is removed using active regeneration — an automatic cleaning process controlled by the exhaust temperature management system.

Selective catalytic reduction (SCR)

  • John Deere engines feature an SCR system that utilizes a urea-based additive, sometimes referred to as diesel exhaust fluid (DEF). The ammonia in the urea reacts with engine exhaust gases in the SCR catalyst to reduce NOx — converting it to nitrogen and water vapor.

High-pressure common-rail (HPCR) and engine control unit (ECU)

  • The HPCR fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures up to 2,500 bar (36,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of injection.

4-valve cylinder head

  • The 4-valve cylinder head provides excellent airflow resulting in greater low-speed torque and better transient response time by utilizing a cross-flow design.

Air-to-air aftercooled

  • This is the most efficient method of cooling intake air to help reduce engine emissions while maintaining low-speed torque, transient response time, and peak torque. It enables an engine to meet emissions regulations with better fuel economy and the lowest installed costs.

Compact size

  • Lower installed cost
  • Mounting points are the same as previous engine models

John Deere electronic engine controls

  • Faster engine control unit (ECU) manages both the engine and the exhaust filter
  • Premium software option integrates with equipment or vehicles to reduce engineering and installation costs
  • Electronic engine controls can be engine or remote mounted

Additional features

  • Glow plugs
  • Gear-driven auxiliary drives
  • 500-hour oil change
  • Self-adjusting poly-vee fan drive
  • Optional factory installed variable-speed fan drive improves fuel economy and reduces noise levels
  • RH and LH engine-mounted final fuel filters
  • Replaceable (wet) cylinder liners
  • Low-pressure fuel system with electrical transfer pump and "auto-prime" feature
  • Big-engine durability

Specifications

Emissions certifications

CARB
EPA Tier 4

General engine data

Model 6068HFG08
Number of cylinders 6
Displacement-- L (cu in) 6.8 (415)
Bore and Stroke-- mm (in) 106 x 127 (4.17 x 5.00)
Compression Ratio 17.2 : 1
Engine Type In-line, 4-cycle
Aspiration Turbocharged and air-to-air aftercooled
Length - mm (in) 1140 (44.9)
Width-- mm (in) 720 (28.3)
Height-- mm (in) 1315 (51.8)
Weight, dry - kg (lb) 770 (1698)

DOC/DPF Dimensions

Size 5 - Diameter - mm (in) 259.3 (10.2)
Size 5 - Length - mm (in) 822.7 (32.4)
Size 5 - Weight - kg (lb) 40.8 (89.9)

SCR Catalyst Dimensions

Size 5 - Diameter -mm(in) 356 (14.0)
Size 5 - Weight -kg(lb) 47.2 (104.1)
Size 5 - Length -mm(in) 784.9 (30.9)

Performance data range

Hz (rpm) 60 ( 1800 )
Generator Efficiency % 89-93
Power Factor 0.8
Engine power - Prime kW 136-164
Engine power - Prime hp 182-219
Engine power - Standby kW 150-180
Engine power - Standby hp 200-241
Rated Fan Power - kW 9.0-10.8
Rated Fan Power - hp 12.1-14.5
Calculated generator set output - Prime kWe 114-143
Calculated generator set output - Prime kVA 142-179
Calculated generator set output - Standby kWe 125-157
Calculated generator set output - Standby kVA 156-196