Instead of relying on a camshaft to generate injection pressure, the G2 system uses engine lubricating oil as a pressure medium.
The new VT 365 V-8 diesel from International Truck and Engine Corp., Chicago, is now found under the hood of International 4200 series trucks.
The new engine features: the company’s Electro-Hydraulic Generation Two (G2) fuel injection technology, based on a common-rail fuel system; International’s EVRT (Electronic Variable Response Turbocharger) for improved throttle response; Intuitive Shift controllers for smoother driving; and cooled exhaust gas recirculation (EGR) for lower NOx emissions.
The VT 365 engine is available in ratings of 175, 195, 215 and 230 horsepower @ 2600 rpm, with up to 620 lb-ft of torque at its highest rating. The engine can be a low-emission vehicle (LEV) certified to meet Clean Fuel Fleet Vehicle requirements.
The G2 fuel system, the heart of the new engine, uses high-pressure injectors, jointly developed by International, Sturman Industries and Siemens. Instead of relying on a camshaft to generate injection pressure, the G2 system uses engine lubricating oil as a pressure medium. A dedicated pump provides 3,000 psi lube oil to a common rail; then, in the injector, the pressure is multiplied by a factor of 7, to 21,000 psi.
Also, the injectors are much smaller than conventional ones, leaving room to accommodate four valves per cylinder. Higher pressure and better breathing, says International, make for more complete mixing of fuel and air, and more efficient combustion.
