RESEARCH OF HYDRAULIC DRIVE VALVES TIMING

Improving the characteristics of internal combustion engine an agricultural vehicle is possible by using a hydraulic actuator electronically controlled gas distribution valves. The drive ensures opening valves pistons cylinders when oil pumped into them, are closed valve springs drained from cylinders. advantages are: ability to turn off cylinders, increase in speed and closing mechanism, no need adjust thermal clearances, constant landing on saddles. integrated lubrication system. working body with pressure 8 MPa, created separate pump. physical mathematical model Simulink environment takes account losses, various inertial effects, elastic-deformation interaction between elements, inductance solenoid coils. experimental setup includes: KAMAZ 740 engine, for two one cylinder head, measuring equipment. results experiments were recorded high-speed movie camera. determination kinematic mechanism was carried out processing video frames shooting at known frequency their fixation. coincide calculations. movement valves, thanks use actuator, significantly increased compared traditional mechanical actuator. time delay supply electrical signal electromagnetic response it determined. obtained make start creating serial that improves parameters intensifying controlling exchange