VGT Gasoline Engine turbocharger

Variable geometry turbocharger(VGT) is a kind of turbochargers, usually designed to allow the effective aspect ratio (A:R) of the turbo to be altered as conditions change. This is done because optimum aspect ratio at low engine speeds is very different from that at high engine speeds.

If the aspect ratio is too large, the turbo will fail to create boost at low speeds; if the aspect ratio is too small, the turbo will choke the engine at high speeds, leading to high exhaust manifold pressures, high pumping losses, and ultimately lower power output.

By altering the geometry of the turbine housing as the engine accelerates, the turbo's aspect ratio can be maintained at its optimum. Because of this, VGT have a minimal amount of lag, have a low boost threshold, and are very efficient at higher engine speeds. VGT do not require a wastegate.

VGT tend to be much more common on diesel engines as the lower exhaust temperatures mean they are less prone to failure.

The few early gasoline-engine VGTs required significant pre-charge cooling to extend the turbocharger life to reasonable levels, but advances in material technology has improved their resistance to the high temperatures of gasoline engine exhaust and they have started to appear increasingly in, e.g., gasoline-engined sports cars.

We supply branded Turbochargers as followings: Borgwarner turbocharger Bosch turbocharger Brown boveri turbocharger Caterpillar turbocharger Cummins turbocharger DAEWOO Turbocharger Daihatsu Turbocharger Detroit turbocharger Deutz turbocharger EMD turbocharger F-DIESEL Turbocharger Fiat punto turbocharger FOTON Turbocharger Garrett turbocharger Greddy turbocharger Harley davidson turbocharger Hino turbocharger Hitachi turbocharger HKS turbocharger Holset turbocharger Honeywell turbocharger HTT turbocharger Hybrid turbocharger IHI turbocharger JDM turbocharger John Deere Turbocharger KAWASAKI Turbocharger KBB turbocharger KOBELCO Turbocharger Komatsu turbocharger KUBOTA Turbocharger Lancer turbocharger Mack turbocharger Mercedes turbocharger Mitsubishi turbocharger MTU turbocharger Opel turbocharger Perkins turbocharger Rajay turbocharger Renault turbocharger Rotomaster turbocharger Saab turbocharger SARD Turbocharger Schwitzer turbocharger SINOTRUK HOWO Turbocharger STS turbocharger TDI turbocharger Terex turbocharger Toyota Turbocharger TRS turbocharger Turbonetics turbos VGT turbocharger VNT turbocharger Volvo Turbochager Vortec supercharger WRX turbocharger XGMA Turbocharger Yanmar turbocharger YTO Turbocharger