Variable Valve Lift System
The engine is provided with a variable valve lift system. The variable valve lift system optimizes the intake valve lift by switching to use low lift cams or high lift cams in accordance with engine speed.
- In response to the signals from the ECM, the oil switching solenoid valve operates to switch the valve lift.
- At low engine speeds, the lift is reduced to increase intake air speed and to obtain effective combustion and higher torque output. The lift of the two valves are different from each other. By differentiating the intake air volume in this way, a swirl occurs in the combustion chamber and combustion is improved.
- At high engine speeds, the lift is increased to reduce intake resistance and to obtain higher power.
- To protect the engine, the system does not allow racing up the engine to high speeds in P or N range.