Booster Online

Honeywell VNT™ Turbo Technology

Posted 09.08.2009

It was Honeywell’s development of Variable Nozzle Turbine (VNT™) technology that enabled car manufacturers to deploy fully the torque and fuel economy advantages of direct injection diesel engines.

What makes VNT™ so effective is its unique ability to regulate the exhaust gas flow in direct response to the engine requirements through a row of moveable vanes positioned around the inlet of the turbine wheel. At low engine speed, the variable nozzle turbine vanes close to build up exhaust pressure to the turbine wheel, thereby increasing turbine power and boost pressure. At higher engine speeds, the moveable vanes open to reduce exhaust pressure and maximize the exhaust flow, thereby avoiding turbo over-speed and maintaining the boost pressure required by the engine.

VNT™ technology is now in its third generation – and it continues drive the upward performance curve for turbo response, driveability, fuel efficiency and emissions control. The latest innovations include a new vane shape, a new turbine wheel and better controllability, all of which combine to deliver 130 percent of second generation VNT™ boost levels at just 90 percent of back pressure.

See an animation of Honeywell 3rd Generation VNT™ turbo technology