198002996 - INTRODUCTION - INTAKE AND EXHAUST MANIFOLDS

AIR CHAMBER

The continuous adjustment swirl valves are incorporated in the air chamber inside the four additional intake ducts.The swirl valves are activated by means of an electronically controlled actuator, operated by a PWM type signal that is processed by the electronics with the consequent control of the position. The actuator moves an adjustment shaft which operates on the swirl valves via an idler.Thanks to the geometric shape of the four additional intake ducts and the swirl valves the fresh gases create a vortex and are directed in the best possible way to the combustion chamber. The filling of the cylinders is therefore excellent.The continuous adjustment of the swirl valves makes it possible to produce optimum turbulence for all engine speed and load conditions.Operating specifications:- temperature interval: between -40°C and +140°C- input signal: PWM frequency 140Hz- diagnostic signal: PWM variable frequency from 10 to 100Hz- power supply voltage: 14V.1. Air chamber2. Swirl throttle control actuator3. Adjustment shaftIt is possible to adapt the turbulence of the fresh gases inside the combustion chambers to the respective engine load conditions by adjusting the swirl valves.High turbulence is created in the combustion chamber by closing the swirl valves, thereby allowing an optimum fuel mixture to be injected at low engine revs.Thanks to this optimum mixture of fuel with fresh gases the emission of pollutant substances is greatly reduced.At a higher number of engine revs the swirl valves are completely open. This produces a reduction in the turbulence of the fresh gases and increases the degree of filling.A higher degree of cylinder filling produces an increase in engine power.