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Home >> Acura >> 2009 >> RL >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Auxiliary Emission Control Systems >> Fuel And Emissions Systems >> System Description >> VTEC System Operation >> At low engine speed

At low engine speed

The rocker arm oil control solenoid is turned off by the PCM. Oil pressure from the rocker arm oil control valve does not enter the rocker shaft. The primary and secondary rocker arms are separated by a return spring and lifted by low lift cam lobe.

Fig 1: VTEC System Diagram (Low Engine Speed)
G06163705Courtesy of AMERICAN HONDA MOTOR CO., INC.
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