cơ cấu phân phối khí thông minh vvt

University of Science and Technology Transportation Mechanical Engineering Variable Valve Timing (VVT) Members: Lecturer: Pham Quoc Thai  Dang Nhat Linh  Nguyen Nam Ha  Dang Tuan Contents I Introduce II Characteristics III Application I INTRODUCE A VVT system allows the lift, duration or timing (in What is the VVT system? various combinations) of the intake or exhaust valves to be changed while the engine is in operation Which results in greater efficiency and power, over a wider range of engine RPMs I INTRODUCE VVT-i VTC (I)-VTEC VANOS I INTRODUCE  Mixture of the fuel and air is poor  Fuel does not burn completely  Low performance  Waste of fuel  Environmental pollution II.CHARACTERISTICS Change of the valve timing  Early intake valve opening  Late intake valve closing  Early exhaust opening  Late exhaust closing Variable Valve-Timing systems use a cam Phasing Mechanism Thus, it changes time providing fuel for the engine and exhausting SOHC DOHC II.CHARACTERISTICS Change the lift and duration of the valve The shape of their camshaft lobes III APPLICATION Honda Toyota Improve the efficiency of car engines 10 Variants of the system VVT-i:  VVTL-i: Variable Valve Timing and Lift intelligent system  Dual VVT-i: Adjusts timing on both intake and exhaust camshafts  VVT-iE: Variable Valve Timing - intelligent by Electric motor  VVT-iW: Variable Valve Timing - intelligent Wide  Valvematic: Control the amount of fuel / air by using valve control The 2ZZ-GE engine, the first to feature VVTL-i 11 Variants of the system VTEC:  VTEC-E: Short cam axis, reduces fuel consumption  3STAGE VTEC: Use different cam modes operating in phases  i-VTEC: Optimized torque and fuel economy  AVTEC: Save 13% on fuel compared to iVTEC and reduce emissions by up to 75% These upgrades will increasingly meet the needs of customers 12 BENEFIT Fuel Money Environment 13 THANK YOU FOR YOUR SPENDING TIME WITH US 14 ... engines 10 Variants of the system VVT- i:  VVTL-i: Variable Valve Timing and Lift intelligent system  Dual VVT- i: Adjusts timing on both intake and exhaust camshafts  VVT- iE: Variable Valve Timing...Contents I Introduce II Characteristics III Application I INTRODUCE A VVT system allows the lift, duration or timing (in What is the VVT system? various combinations) of the intake or exhaust valves... Electric motor  VVT- iW: Variable Valve Timing - intelligent Wide  Valvematic: Control the amount of fuel / air by using valve control The 2ZZ-GE engine, the first to feature VVTL-i 11 Variants