OMEM710 Hardware Manual 2v11
34
The 710 series ECU can control idle using spark scattering, push/pull motors and stepper motors.
The idle condition is entered by the options Idle on Below RPM, and Idle On Throttle. The engine
must be below both of these values to enter idle.
The normal warm target idle speed that the ECU attempts to maintain is set by Idle FB Target RPM.
A high idle will be required in some conditions. The ECU can set a high idle speed based on coolant
temperature (Idle Hi Below Cool), or as engine speed drops towards idle to give a ‘soft’ return to
idle (Idle Hi Time and Idle Hi Decay). The target idle increase above the normal idle speed for high
idle is Idle Hi FB Target+. When returning to the idle condition the target speed is the ‘Hi’ speed for
Idle Hi Time then reduced to the normal idle speed over a period of time set by Idle Hi Decay.
11.1 Without air bypass idle motor
If there is no idle motor on the engine then just the scatter spark idle is used.
The Idle Scatter Spark Table shows the change in ignition timing based upon rpm away from the
target engine speed. When the engine speed is higher than target negative values are required to
To Next Page
Loading...
