Synchronous Injection

When starting the engine, the fuel injectors inject the fuel simultaneously and synchronously at every BTDC 75 degrees signal of the CMP sensor. When the engine is starting at a cold state, the amount of fuel is determined by the Engine Coolant Temperature (ECT) sensor and is divided and injected.

Once the engine is running, the fuel injection occurs in a cylinder only when it is in the exhaust stroke. The PCM detects the compression stroke of the No.1 cylinder through the CMP sensor signal.