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28 11 11 VTC System VTEC System K20Z2 engine K20Z3 engine 11-38 Fuel and Emissions Systems MAXIMUM VTC ADVANCE 25 ° TDC EX IN 1 IN 2 EX IN 2 IN 1 MAXIMUM VTC ADVANCE 25 ° SHORT OVERLAP LONG OVERLAP LOW SPEED VALVE TIMING HIGH SPEED VALVE TIMING EX IN EX IN IN (LOW LIFT) LOW SPEED VALVE TIMING HIGH SPEED VALVE TIMING EX IN EX IN • The VTC system makes continuous intake valve timing changes based on operating conditions. reduce the entry of the air/fuel mixture into the intake port and improve the charging effect. • The system reduces the cam advance at idle, stabilizes combustion, and reduces engine speed. • The VTEC system changes the cam profile to correspond to the engine speed. It maximizes torque at low engine speed and output at high engine speed. • The low lift cam is used at low engine speeds, and the high lift cam is used at high engine speeds. 08/08/21 14:13:40 61SNR030_110_0038 |