What is a variable exhaust system?
What is a variable exhaust system?
translated from. A dynamically variable exhaust system provides for maximum efficiency of an internal combustion engine (30) by including an exhaust control device (35) which is operated by a control mechanism (33) and managed by a control unit (32).
How does a variable geometry turbocharger work?
A VGT or VTA is a turbocharger, wherein movable vanes are replaced for conventional fixed vanes, which can change angles to control the exhaust flow on the turbine blades. This helps the engine control to balance the volume of air with the fuel along the entire engine load range.
In which application variable geometry turbine is beneficial?
Abstract: The variable geometry turbine allows significant flexibility over the pressure ratio across the turbine. In diesel engines, this flexibility can be used for improving low speed torque characteristics, reducing turbocharger lag and driving EGR flow.
What is the purpose of a variable outlet exhaust?
The purpose of these devices is to mitigate design compromises that fixed hardware poses be- cause engines typically operate over a wide range of speeds and loads. Func- tional requirements vary, but typically, variable hardware is useful in breaking compromises associated with performance, fuel economy, and emissions.
How does a varex muffler work?
How do Varex Mufflers Work? Varex mufflers are manipulated with the use of a simple control unit, which plugs into the muffler at one end and your 12V power socket at the other. The control unit links up with a simple remote key pad that switches the muffler open and closed whenever you need.
Are VGT turbos better?
You can maximize the boost your turbo provides at a much greater RPM range because of the adjusting vanes. After all, the more air and fuel going into the engine, the more horsepower. Key features of VGTs: Improved low speed torque reducing turbo lag.
How do VGT turbos control exhaust back pressure?
The direction of the flow to the turbine rotor is a combination of the vectors of the two flows. Varying the flow angle to the turbine rotor can control the turbine speed, and hence control the turbine inlet pressure (exhaust back pressure of the engine).
Why do fighter jets have variable nozzles?
A variable area nozzle helps to adjust the exit pressure of the combustion gases to ambient pressure. When they leave the turbine, the combustion gases have still some remaining pressure which is converted into speed by a convergent contour of the nozzle.
