Pic. 2.212. Diagram of the ACIS system: 1 - actuator; 2 - control valve of the variable valve timing system; 3 - to the smoothing receiver; 4 - vacuum valve; 5 - vacuum reservoir; 6 - electronic engine control unit; 7 - frequencies
To implement the control of the intake system, a baffle is installed in the intake manifold (see fig. 2.212), dividing the collector into 2 chambers. There is an intake air control valve in the baffle, opening and closing of which can change the effective length of the intake manifold in accordance with the throttle opening angle and engine speed. This system increases engine power in all operating frequency ranges.