The injectors are removed from the vehicle and then ASNU tests for:
- Leaks -
The pressure regulator allows any system pressure from 0 to 8 bar to be set. Furthermore variable system pressure can be used to test for injector leaks.
- Fuel Spray Management -
Spray pattern shapes and atomization
quality are easily inspected in the ASNU Display window
- Fuel Delivery Volumes -
The precise quantity of fuel delivered
can be measured and compared for up to 8 top feed or 6 side feed
injectors at one time.
- Electronic Operation -
ASNU examines the injectors performance
during a 10 program option millisecond and RPM simulation program.
After the injectors are clean, the serviceable
items are replaced. The injectors are refitted with new filter baskets,
pintle protection caps, spacers and O-Ring seals.
Then the injectors are re-tested for leaks, spray pattern shape and
atomization, fuel delivery volumes and correct electronic operation. When
the operator is satisfied that the injectors are performing as a properly
matched balanced set, they are ready to be returned to the engine.
All results, before and after, are recorded on the ASNU
Service Report Pad.
In all cases it is essential that the electronic
injectors perform as a matched and balanced set. Injectors are tested and
checked for the following requirements:
A balanced fuel delivery at all operating points
Correct fuel distribution (Required point of atomization can vary)
Effective fuel atomization (create very small even droplets of
Reliable valve seat sealing - no leaks
Retain all its functional values throughout its minimum service
Once the injectors have been tested, the
pintle protection caps, filter baskets, spacers and O-rings are removed
using ASNU's purpose built tools. The injectors are then placed in ASNU's
purpose built ultrasonic cleaning bath for cleaning.
ASNU's patented ultrasonic cleaning process and variable cycle program cleans the inside of the injector, the pintle valve head, pintle seat and
pintle needle guides, all back to their original manufactured condition.