BOOSTED INTERNAL COMBUSTION ENGINE PROVIDED WITH VALVE ACTUATION SYSTEM (VA)

• Main Author: FESSLER, Harald
• Format: Patent
• Language: English; French; German
• Published: 17.11.2021
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

Boosted internal combustion engine (IC) provided with valve actuation system (VA), the combustion engine comprising a head (H) where a poppet valve (V) is arranged in such a way to open protruding in the combustion chamber and to close against a corresponding seat, the valve communicating the combustion chamber with an intake manifold (IK), the actuation system (VA) including a pneumatic actuator (PD) comprising a piston (AP) operatively connected with the stem (VS) of the poppet valve (V), at least a first chamber (FC) where the piston (AP) is movable in such a way the first chamber is between the poppet valve and the piston (AP), a spring (SP) arranged to expand the first chamber, wherein the first chamber is fluidly connected with the intake manifold through a pressurization throttled channel (PC) and a pressure sink (SK), which is at a pressure constantly under the intake one, through a controllable valve (SV).