Asnu Machines

There are two chemicals used in the ASNU machine. The calibration fluid which is a Stoddard Solvent with the same viscosity and specifies gravity of gasoline (without the flammability) is used to flow test and leak test the injectors. The other chemical is the water-based (biodegradable) chemical used in the ultrasonic tank for cleaning the injector!

There is a one-year (parts) warranty.

There is an optional software program that will allow you to interface your laptop or PC to ASNU for the purpose of setting different parameters (MS pulses, simulated RPM, or the number of pulses) or you can use any downloaded data acquisition information to drive the injectors. The software allows you to drive the machine functions, but ASNU will not provide the computer any information for printing.

The machine will only bring the injector back to 100% of its original flow rate, to change the flow rate from the original Manufacture would require disassembly of the injector and changing the orifice, pintle size, or lift of the pintle off the seat. Since injectors are manufactured to microns of tolerance it takes specialized equipment to assemble the injectors; which is usually only found at injector manufacturers.

Since the machine will bring the injectors back to 100% of the original flow rate, and the injector manufacturers allow from 1% to 4% deviation in flow rate when manufactured you may have eight injectors that have a 4% deviation in flow between the highest and lowest flowing injector. To make all eight injectors have the same flow rate would require having multiple injectors and grouping that have the same flow rates in one set.

No, the machine will not test Diesel injectors.

With the addition of the GDI capabilities ASNU can check all top feed and side feed injectors currently being installed on automobile, marine and motorcycle applications. The machine comes with the adapters to test the top feed injectors. Side feed adapters are available for all currently known side feed injectors; and we manufacture any new adapters for new side feed applications and add to the catalog before the life cycle requires servicing of the injectors.

We supply approximately 300 part numbers used in the reconditioning of fuel injectors, many items such as filters, pintle caps, and insulator washers are not available from the DE suppliers.

The machine we are supplying in the US has a high-performance pump (twice the volume and twice the pressure capability of the standard pump), and a high-performance fuel rail to handle high pressures without distorting.

The OE suppliers of injectors are reluctant to supply information on their injectors because they are tested under conditions that would be hard for most of us to duplicate, therefore the variables would cause the information to be invalid in their eyes. ASNU is meant to be a comparator of the injectors of one part number, or all of the injectors from one engine to verify the spray patterns, flow volume, and coil resistance are matched to the allowable factory tolerances (in the case of flow rates 2% – 4%). Many of our customers have built a database of specific part number parameters utilizing their own testing procedures that they can duplicate each time with the ASNU equipment.

ASNU does not believe examining direct injectors at higher pressure will provide conclusive results of fuel distribution due to inability to view fuel particles at high pressure.  By evaluating injector coil condition with inductance readings, and evaluating spray patterns and atomization at low pressure to view for consistency, ASNU with the help of injector manufacturers has determined low pressure testing is most advantageous.  Testing at lower pressure also keeps the machine cost down, and provides a safer testing environment.