Isuzu Dual-Fuel 4HV1 Engines

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