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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Cylinder Head Assembly - 1.6L (Except HEV)) >> CVVT & Camshaft >> Description And Operation >> [CVVT System Mode]

[CVVT System Mode]

WARNING: This page is about a different variant/trim than selected.
Fig 1: CVVT System Mode Graph (1 Of 2)
G11986861Courtesy of HYUNDAI MOTOR AMERICA
Fig 2: CVVT System Mode Graph (2 Of 2)
G11986862Courtesy of HYUNDAI MOTOR AMERICA
Driving Condition Exhaust Valve Intake Valve
Valve Timing Effect Valve Timing Effect
(1) Low Speed/Low Load Completely Advance *Valve Under-lap
*Improvement of combustion stability		 Completely Retard *Valve Under-lap
*Improvement of combustion stability
(2) Part Load Retard *Increase of expansion work
*Reduction of pumping loss
*Reduction of HC		 Retard *Reduction of pumping loss
(3) Low Speed/High Load Retard *Increase of expansion work Advance *Prevention of intake back flow
(Improvement of volumetric efficiency)
(4) High Speed/High Load Advance *Reduction of pumping loss Retard *Improvement of volumetric efficiency
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