Rev. 09/2022
11
3.1
Functional Description
All graphics used in this section represent an example of a VariFuel3 series 200-120.
Basic Design
The main task of the gas mixer is it to mix the fuel (gas) and the air so that an optimal combus-
tion is ensured within the gas engine. Here, the decisive optimization parameters are a high
degree of efficiency and low emissions that comply with relevant regulations.
In the VariFuel3, gas and air are mixed based on the Venturi principle. Based on the suction
pressure of the engine, the air is sucked in through the air inlet
into the Venturi nozzle. This
creates an underpressure at the most narrow place, which causes the gas to be sucked in
through the gas inlet
. In this way, both the gas and the air are mixed and released at the
mixture outlet
. The volume flow and thus the air/gas mixture can be adapted to the respec-
tive engine by using different design sizes and different flow bodies in the Venturi nozzle.
3 Intended Use
