System Description
ECM INPUT SIGNAL CHART
| Sensor | Input signal to ECM | ECM function | Actuator | ||
|---|---|---|---|---|---|
| Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed | Intake valve timing control | Intake valve timing control solenoid valve | ||
| Intake valve timing control position sensor | Intake valve timing signal | ||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||
| Unified meter and A/C amp. | Vehicle speed(1) | ||||
|
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This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.