How does Honda VTEC work?
1 Answers
i-VTEC system works by automatically directing oil pressure to a small turbine inside the intake camshaft drive gear when the engine transitions from low to high speed. Under pressure, the small turbine rotates a certain angle relative to the gear housing, causing the camshaft to rotate forward or backward within a 60-degree range. This changes the timing of the intake valve opening, achieving continuous adjustment of valve timing. Except for the 1.3L Fit, all Honda models, whether from Dongfeng Honda, Guangqi Honda, or imported Honda, are equipped with this intelligent variable valve timing system. Honda's i-VTEC system is the English abbreviation for Honda's intelligent variable valve timing system. The latest Honda car engines are generally equipped with the i-VTEC system, which can continuously adjust valve timing and valve lift. Honda's VTEC engine has long been known as the 'synonym for variable valve engines.' It not only delivers exceptional horsepower but also emphasizes low emissions, environmental friendliness, and low fuel consumption at low RPMs. These completely different characteristics coexist in the same engine because it features two or even three different cam profiles on a single camshaft. At medium and low RPMs, small-angle cams are used, while at high RPMs, the system switches to high-angle cams, resulting in two distinct performance output curves from the same engine.
