MembersPage/CngEngine (2017-03-09 10:55:39)

Certified CNG engine

4 cyl 2L PSA engine (Peugeot, Citroen, Suzuki, Fiat)


ECU specs (draft)


Certification

There are some certification considerations:

R110 (114 pages, my doc is in Hungarian; seems like it is derived from some UN directive) for CNG engine road vehicles... * available in English ?

Is EMI test needed?

Most likely series resistors will be used, not PWM-ing (with PWM-ing, special harness would be needed to pass certification EMI test, if EMI test needed at all).

The Certification harness might slightly differ from the production harness. Eg.

Why certify ? Third-party certification is good for certification :-)


Trigger


Low Impedance Injectors

[Hercules GISM-I1000]

3.5 Ohm .. 3.8 Ohm measured, some sites say 1.7 Ohm

=> use 3.3 or 4.7 Ohm 50 Watt series resistor for each''' !
  • (6.8 Ohm might be too high to open reliably).

Pressure sensors

MAP sensor on "air-side"


Harness for certification


Ignition


Exhaust measurement

These are easy:

Installer should make a proposal (netlist of connections) and submit for review