Here we cover the background, operation, and diagnosis of direct injection systems. Most manufacturers have moved to this type of fuel injection system in recent years.
In this video we describe the background of direct injection and why it's more efficient. We look at system operation, component operation, electrical operation, and the different modes of operation.
As these systems operate at much higher pressures than conventional port injection systems, we cover the service precautions required when performing service to these systems.
Later we cover the difference between stratified mode and homogenous mode, and how each is determined by mixture and injector timing. Also, the operation of wide band oxygen sensors and why they are required for direct injection.
Finally we cover the operation of the high and low fuel pumps used in these systems.
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