Why choosing DIT31, the universal test bench for the diesel fuel injectors

DIT31 is not a conventional test bench, where the pressure is generated by a common rail pump.  

Because on these pumps, 2 or 3 plungers are used to raise the pressure, they causes big fluctuations of the pressure, even if a pressure accumulator (rail) is present in the circuit.  

For the vehicle, this method is fine, but for testing, an higher level of accuracy is required to detect any fault.

On DIT31 a pneumatic pump is capable to produce up to 2400 BAR, with a conventional 10 BAR compressed air line.

As a result, the machine is very compact and pressure levels are very stabilizeds

A microprocessor controls pressure and time with respective resolution of 0,1 BAR and 0,1 msec. The 2% accuracy of measurements is warranted.

These performances are appropriate for the quality controls of the engine manufacturers. 

DIT31 makes these fulfillments available also for your diesel services, at very affordable prices.

In fact, the design of DIT31 is modular to cover the widest application range and match your today needs, which tomorrow are destined to require an update, in order to comply the market changes.

No worry: DIT31 has extremely powerful foundations to effectively suite your business growth.


Testing the mechanical diesel injectors

For sure you are testing mechanic injectors and possibly a pop tester helps you in this job.

Should your pop tester fail, stop wasting your money to buy a new pop tester.

Instead, consider that investing on DIT31 is more productive way of thinking.

For this application you will not need the triggering options, neither for the electromagnetic neither for the piezo injectors. 


At this stage, all you need is the basic DIT31: 

  • Max pressure supply: 1500 BAR, 
  • Digital manometer
  • Automatic relief of the Nozzle Opening Pressure (NOP), as well as both NOP1 and NOP2 on 2-spring injectors
  • Automatic leakage time calculation
  • Test report printing
  • Automatic test cycle to clean the injector and settle the components
  • Flushing the injector is available anytime, by the proper push button.
  • Fine flow adjustment to check on special conditions (drops)
  • Halogen light to enhance the spray pattern view.
  • Smoke suction and evacuation


Testing the common rail injectors

Meanwhile you are becoming more confident with the machine, probably you are requiring to test also common rail injectors.

Nothing to change: just add TC38, the universal triggering unit, easily programmable by smart cards.

The step-by step approach will suggest to firstly open to those electromagnetic actuated (by solenoid) and to those piezoelectric actuated, at a later time.

This is a private evaluation, no doubts. Just consider that the upgrade is possible anytime and there is just an electric board to install in the TC38.

As addition, you will receive the set of smart cards, and you will keep using the same operating procedure.

For the common rail injectors, the nozzle opens at any pressure level, higher then the idle pressure.

Furthermore, the tolerances are much more tighten. Why preferring DIT31 to other competing systems becomes now more evident.


The innovative testing method

For a Diesel Fuel Injection Specialist, testing doesn't mean to simply let working and empirically verify that an injector sprays or not. 

At Deteq, testing is intended as the art of evaluate comparable results, based on repetitive and reliable measurements, which should be gathered under systematic conditions.

With DIT31 there is no need to wait the end of the testing cycle in order to collect the injected fuel and measure it in somehow.

The technology applied on DIT31 requires just one chatter. It is enough to accurately relief the following parameters:

  • Pressure when the nozzle opens
  • the delay time, necessary to convert the eletric commant to a mechanical action (Start of Injection)
  • the total time during which the nozzle keeps opened (Lenght of Injection)
  • the pressure drop within the injection time (flow rate)

A collection of test figures is available

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