The EPz06 driver owns 6 piezo electric injectors channels. It can only be used with Advance and Commander ECUs series (for other ECU types, do use EPS06 driver).

This driver is used in gasoline direct injection piezo kits.

GENERAL OPERATION
EPz06 is a driver specifically dedicated to the command of piezo electric gasoline injectors.
It provides the high tension needed for injectors opening thanks to a switching mode power supply located in its housing.
Unlike most of its competitors, it is designed to allow injection covering of a channel on the other one (between cylinders).

CARE OF USE
A capacitor of strong capacity being integrated into the switching mode power supply, the high tension can remain much later the complete switch off of the driver:
• It is forbidden to open the housing.
• It is forbidden to manipulate the driver or the connections of its loom within the 3 minutes following its complete switch off.
The strong power delivered in case of extensive use (high engine rpm and important number of injections by engine cycle, high tension of injectors) provokes a strong rise of the internal temperature. The housing of the driver being used to dissipate this temperature, it can reach temperatures higher than 100 °C.

CHARACTERISTICS
• 6 channels of injectors commands
• Inputs commands by the ground, 1 KOhm pull-up resistor to +12V After Key integrated into the driver.
• Response time: 2 µs
• Injection covering of a channel on the other one (between cylinders) allowed
• Maximal power delivered to injectors for the peak current: 36 watts
• Average maximum number of injections for all channels cumulated : 42360 injections/mn (14120 t/mn – 6 cylinders – 1 injection per cylinder, 21180 rpm – 4 cylinders – 1 injection per cylinder)

INJECTORS MANAGEMENT
The injectors command tension is dynamically tuneable to adapt to the needs of the injectors to drive. It ranges from 95 volts to 180 volts.
This tension is managed by a map function of the fuel pressure (rail pressure) and the injectors temperature (estimated from the engine temperature), these two values beeing received by CAN-BUS from the engine management ECU.
Injectors control
• Measure of the command tension and resting tension in real time, injector by injector
• Controlling of the command tension of injectors by looping, following a real time received target
• Control of the injectors operation errors:
– disconnected,
– short circuit, causes a stop of the injector then a test every second up to short circuit ends
– closing error, causes a definitive stop of the injector to protect the engine