Scheme 217
Low Lift Operation
Rocker arm oil control solenoids 1 and 2 are both OFF. Engine oil pressure from the oil pump is lead to OUT 1 and pushes piston A (inside the intake rocker arm No. 1 and No. 2) to the right side. This makes intake rocker arms No. 1 and No. 2 unified and the intake valve will lift with the low camshaft specification.
High Lift Operation
Rocker arm oil control solenoid 1 is ON, and rocker arm oil control solenoid 2 is OFF. The engine oil pressure from the oil pump is lead to OUT 2 and pushes piston B (inside the intake rocker arm No. 2 and No. 3) to the left side. This makes intake rocker arms No. 2 and No. 3 unified and the intake valve will lift with the high camshaft specification.
Valve pause operation
Rocker arm oil control solenoids 1 and 2 are both ON. The engine oil pressure from the oil pump is lead to OUT 3 and pushes piston A (inside the intake rocker arm No. 1 and No. 2) to the left side and piston C (inside the exhaust rocker arm No. 1 and No. 2) to the right side. This separates intake rocker arms No. 1 and No. 2 and exhaust rocker arms No. 1 and No. 2 causing the intake valve and the exhaust valve to stop.
| Rocker arm oil control solenoid 1 | Rocker arm oil control solenoid 2 | Rocker arm oil pressure sensor signal | Rocker arm oil pressure switch signal | Rocker arm activation (Rocker arm oil control valve oil pressure output) | |
|---|---|---|---|---|---|
| Low valve lift mode | OFF | OFF | High | OFF | IN side rocker arm: Low lift EX side rocker arm: Normal lift (OUT 1) |
| High valve lift mode | ON | OFF | Low | ON | IN side rocker arm: High lift EX side rocker arm: Normal lift (OUT 2) |
| Valve pause mode | ON | ON | Low | OFF | IN side rocker arm: Pause EX side rocker arm: Pause (OUT 3) |
VALVE PAUSE OPERATION CHART
Scheme 218
See also:
• P0420 (67)
• P2279 (109)