Checking control unit input values
Checking modulating piston movement sender -G149 and quantity adjuster -N146
The metering unit (quantity adjuster) is an electromagnetic swivelling positioner which is controlled by the control unit via a directed duty cycle (on-off ratio). The eccentric shaft on the metering unit moves the modulating piston on the high pressure piston and thereby regulates the quantity of fuel injected.
The modulating piston movement sender informs the control unit of the position of the modulating piston, thereby indicating the quantity of fuel injected.
‒ Read measured value block, Display Group 01, engine at idling speed