Isuzu Dual-Fuel 4HV1 Engines

The dual-fuel 4HV1 engines and power units can operate on natural gas or liquid propane depending on the fuel source available without reconfiguring the base engine.

Isuzu Dual Fuel Engineat Conexpo
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Isuzu introduces its first dual-fuel 4HV1 engines and power units in the alternative fuels market to easily transition fuel choices on the job site.

  • Operates on natural gas or liquid propane depending on the fuel source available without having to reconfigure the base engine
  • Simply requires sending a signal to the engine to instruct it to use natural gas or liquid propane fuels
  • Signal sent via a supply to the pin connector in the machine interface  
  • Supplies 12V or ground signal to the engine to indicate what fuel type will be used prior to engine start
  • Once the engine receives the fuel type signal, the electronic control module (ECM) will control the appropriate fuel lock-off valve and set the ignition timing and air/fuel ratio for the specified fuel type
  • Helps eliminate downtime and rework
  • Achieves higher compression ratio, resulting in lower fuel consumption
  • Built on tested and proven heavy-duty diesel base foundation
  • Maximum rated output of 78.4-79.8 hp (58.5-59.5 kW) and peak torque of 238.6 lb.-ft. (323.5 Nm) when operating on natural gas
  • Maximum rated output of 82.5-56.3 hp (61.5-56.3 kW) and peak torque of 255.6 lb.-ft. (346.5 Nm) for liquid propane operation
  • Heavy-duty block, crankshaft, cylinder head, and connecting rods all lead to durable, long life benefits
  • Includes replaceable dry cylinder liners
  • Equipped with oil pressure, coolant temperature, intake air pressure and temperature, and engine speed sensors and shutdowns to ensure safety and security
  • Features ease of maintenance and flexibility with both an engine-mounted, maintenance-free ECM and a 500-hour oil drain interval  
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