MotoHawk:Blocks:Injector Driver

Fuel Injector Output

This MotoHawk™ block is intended to be a fuel injector driver.

Block ID

motohawk_injector

Library

MotoHawk_lib/Advanced Digital I/O

Description

Two selectable operating modes (Behavior) are available, Standard and Transient.

In Standard mode, a single pulse is generated per cylinder top-dead-center (TDC), with an electrical duration of 'Mech Duration' plus 'Mech to Elec Offset', and starting at a crank angle of start-of -injection (SOI) plus an 'Angle Offset'.

In Transient mode, up to two pulses are generated. The first pulse is started at SOI, and if the the desired duration rises above the 'Make-Up Min Mech Duration' after the pulse has completed, then a second Make-Up pulse will be generated, ending at Make-Up EOI (end-of -injection).

'Angle Offset' is normally the crank angle for the given physical cylinder, in degrees after TDC of cylinder 1.

'Peak Duration' is used with a Low-Impedance Injector, and controls the duration of the peak portion of the pulse. The remaining time is the hold time.

The Update Mode selects whether the OS should protect against missing pulses and double pulse generation. If Application is selected, no error checking is provided, and the application is completely trusted. If OS is selected, some amount of checking is done by the OS.

Pulses are only generated while the Enable input is True. When the Enable input goes False, any pulses already started will complete.

Block Parameters

Parameter Field	Values	Comments/Description
Resource	Drop-down list	Select from available listings, as appropriate, to apply output.
Behavior		Select operating mode for output
	Standard	A single pulse is generated per cylinder TDC, with an electrical duration of Mech Duration (per input of that name) plus Mech to Elec Offset (per input of that name), and starting at a crank angle of SOI (per input of that name) plus Angle Offset value as entered.
	Transient	Up to two pulses are generated. The first pulse is started at SOI, and if the the desired duration rises above the Make-Up Min Mech Duration after the pulse has completed, then a second Make-Up pulse will be generated, ending at Make-Up EOI. If the first pulse has already extended beyond 'Make-Up EOI', the make-up pulse will not be generated. When using the Transient mode, there must be a separation between the EOI and next SOI that is larger than one crank encoder tooth. Enter an appropriate angle into Min EOI to SOI Angle.
Update Mode		Select whether to have OS protect against pulse errors.
	OS	Operating System protects against missing pulses and double pulse generation.
	Application	No error checking is provided, and the application is completely trusted.
Granularity	Fine or Course	Fine granularity (resolution) interpolates engine position between encoder teeth. Can result in reduced maximum duty cycle for MPC5xx based modules. Course granularity does not use interpolation. Angles resolve to the closest encoder tooth. Modules besides those cores that have an MPC5xx ignore this setting and utilize fine granularity irrespective of this setting.
Angle Offset (deg aTDC)	Numeric	Enter angle offset value from TDC for SOI.
Use Make-Up EOI Port	Check box (enable)	Enable control of EOI via port instead of via Min EOI to SOI Angle parameter. Useful for Transient Behavior mode (see above).
Min EOI to SOI Angle (deg)	Numeric	Enter minimum angle from EOI to SOI.
Minimum Duration Mode	Static or Dynamic	Only applicable to MPC5xx based modules. Any scheduled electrical injector duration smaller than this value is considered to have zero duration when scheduled. Is a member of the mask when the static Minimum Duration Mode is selected and is a signal when dynamic is selected.
Minimum Duration (ms)	Numeric	Enter value for injector duration. Only applicable if a Static Minimum Duration Mode was selected.
Output Injector Diagnostics	Check box (enable)	Enable diagnostic output ports on block, including Transition Count, and Transition Time.
Allow I/O pin to be calibrated from MotoTune	Check box	Name, Access Levels and MotoTune Group Strings fields available
Name	Alpha-numeric text, single-quote enclosed	Choose the Name to reference. No special characters, such as spaces, dashes, commas (underscore allowed).
Read Access Level	1-4	Sets security level 1 lowest, 4 highest, for user access to read value
Write Access Level	1-4	Sets security level 1 lowest, 4 highest, for user access to write value
MotoTune Group String	Alpha-numeric text, single-quote enclosed	Determines Folder name and hierarchy as displayed in MotoTune. Use "|" character between folder names to delineate subfolder structure