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FUEL SYSTEM
3
2. CNG FUEL SYSTEM COMPONENTS:
A. CNG CYLINDER:
Function:
CNG is stored in a high pressure cylinder at a
pressure of 200 bar (working pressure). The
maximum storage pressure of CNG in cylinder is up
to 260 bar (i.e. cylinder test pressure). The cylinder
is fitted with an electrical solenoid valve which
controls the CNG output from the tank & is operated
by CNG ECU.
The cylinder is connected with stainless steel tube
for filling and delivery of CNG.
Mounting Location:
The CNG cylinder is located under the driver & co-
driver seat and mounted on a rectangular cradle.
REMOVAL & REFITMENT OF CNG CYLINDER:
REMOVAL
NOTE:
Park the vehicle with brakes ON and duel
selector switch is kept in CNG mode.
Manually turn of the tank valve and connect
the TML tester tool and start the service
“Empty CNG lines”
Crank the engine and run in idle condition
until engine stop at its own.
Re crank the engine it should not start (tank
pressure should be 0 bar)
WARNING :
Do not turn OFF Cylinder Valves , in vehicle
running in CNG mode. This may wrongly detect
the leakage error.
Disconnect battery negative cable.
Remove driver & co-driver seats.
Disconnect the cylinder valve solenoid coil.
Dismantle the Top corrugated hose by
disconnecting the hose clip.