Variable-geometry turbochargers (VGTs), occasionally known as variable-nozzle turbochargers (VNTs), are a type of turbochargers, usually designed to allow the effective aspect ratio (A/R ratio) of the turbocharger to be altered as conditions change.

A variable geometry turbo for a diesel engine controls engine exhaust flow through the turbine wheel using a row of vanes. These vanes open and close to match the engine’s exact boost requirements.

In diesel engines, this flexibility can be used for improving low speed torque characteristics, reducing turbocharger lag and driving EGR flow. The most common designs of variable …

VGT涡轮增压器的优点有：可提升增压压力和增压器响应速度、达到最大扭矩对应的转速更低、发动机MAP中有更多工况增压器介入工作，提高发动机热效率等。 现在的发动机通过废气涡轮增压器进行强制进气，提升了进入气缸内的空气密度，从而达到小排量大功率的目的。 虽然发动机在全负荷状态时排气能量非常可观，但当发动机在低负荷低转速时，排气能量很小，涡轮增压器因驱…

In a nutshell, variable geometry turbochargers (VGT) are combining the benefits of a small A/R ratio and a large A/R ratio into one unit, bringing together the advantages of both types. Variable geometry turbochargers means variable A/R ratios.

2022年3月17日 · So, what is a variable geometry turbocharger? The purpose of a variable geometry turbocharger is to maximize the amount of pressure you have across your rev range. It is the next generation of turbocharger technology, using variable vanes to control exhaust flow against the turbine blades.

2017年5月1日 · Currently, VGTs offer significant alternative options or complementarity vis-à-vis more advanced turbocharging options. This review details the range of prominent variable geometry technologies that are commercially available or openly under development, for both turbines and compressors and discusses the relative merits of each.

2021年1月16日 · Despite additional costs 💰, VGT (Variable Geometry Turbine) TurboCharger offers lot of advantages including a significant increase of boost pressure ↗️ and a broader torque curve. There are several options💡in the technology design of VGT to make the flow to follow a certain path into the turbine ↩️.

2001年1月5日 · A turbocharger with new structure has been developed for passenger car applications, the RHF series Variable Geometry System (VGS) turbocharger. The object of VGS turbocharger is to improve engine performance, over a broad engine speed range, by changing the swallowing capacity of turbine with a variable geometry nozzles.

2014年7月31日 · Variable geometry turbochargers work on the principle of aspect ratio adjustment, essentially varying the ratio of exhaust inlet width to turbine size. This can work in …