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National Instruments Direct Injector Driver System Manual
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4.5.2 DI-EPT Tab
The DI-EPT tab is for configuring EPT injection command pulse sequences with up to 6 pulses per sequence.
Figures 4.5.2.a and 4.5.2.b, below, are timing diagrams showing the effect of each DIX Timing Mode parameter.
An independent EPT command sequence is provided for each DI Driver module. The EPT command sequence
associated with a DI Driver module can be configured to apply to all channels of that module, or it can be configured
so that each individual channel receives different injection durations. Each command pulse sequence can be
independently configured to operate in Start of Injection (SOI) mode or End of Injection (EOI) mode according to
a specified angle with respect to the channel’s Top Dead Center (TDC) reference. Some parameters are disabled
according to the selected DIX_Timing Mode . The disabled parameters will retain their most recently entered value
and will not accept a value from the keyboard.
The DI module can also operate in a Skip Fire mode, wherein the user specifies a Skip Fire Sequence according to
the total number of cycles desired in the sequence, SkipFire_Cycles , and the number of active cycles in which an
injection occurs, SkipFire_OnCycle . Only one Skip Fire Sequence can be defined for the entire DI Driver System, but
it can be enabled on all present channels.
Pulse #
Tip Strip: Enables injection pulse
Detail: When ON , the command to the associated DI Driver module channel will be active for the specified
duration. When OFF , the command will be inactive, but the specified timing and duration will still be
implemented. Therefore, the timing of the adjacent pulses will remain the same, whether the pulse is
ON
or
OFF .