System Description
SYSTEM DIAGRAM
| Component parts | Function |
|---|---|
| Crankshaft position sensor 1 | Crankshaft Position Sensor 1 |
| Exhaust camshaft position sensor | Exhaust Camshaft Position Sensor |
| Mass air flow sensor (With intake air temperature sensor) | Mass Air Flow Sensor (With Intake Air Temperature Sensor) |
| Engine coolant temperature sensor | Engine Coolant Temperature Sensor |
| Air fuel ratio (A/F) sensor 1 | Air Fuel Ratio (A/F) Sensor 1 |
| Throttle position sensor | Electric Throttle Control Actuator |
| Accelerator pedal position sensor | Accelerator Pedal Position Sensor |
| Battery | ECM receives the battery voltage signal. |
| EVAP control system pressure sensor | EVAP Control System Pressure Sensor |
| Combination meter | ECM receives the vehicle speed signal via CAN communication. |
| ECM | ECM (With Barometric Pressure Sensor) |
| EVAP canister purge volume control solenoid valve | EVAP Canister Purge Volume Control Solenoid Valve |
SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister. The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank. The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases. EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.