|
|
|
59 The solenoid valves are open when: the switching button is in the methane position; the pressure in the cylinder is sufficient for operation; the engine is running; The solenoid valve assembly is equipped with the following safety devices: 1) Fuse pad : in the event of overheating (temperature above 110 ° C), it totally eliminates the danger of excess pressure making the methane in the cylinder flow out as quickly as possible in a controlled manner. 2) Mechanical excess pressure device (Burst Disk) : in the event of excess pressure (above 330 bar), it ensures that the methane escapes as quickly as possible in a controlled manner. 3) Excess flow device : intervenes if the pipes break and limits the flow of methane exiting to non dangerous levels. allow it to operate even if the solenoid valve casing is broken due to an impact. 4) Manual tap : positioned upstream of the solenoid valve. This separates the cylinder from the methane system to allow maintenance operations. the vehicle and are located, in the case of the lengthwise middle cylinder, at the rear of the cylinder and, in the case of the transverse rear cylinder, towards the wheel right side. knob in the direction (1) shown by the arrow (clockwise OFF). knob in the direction (2) shown by the arrow (anticlockwise ON). 1 2 D 115 F0T0349 5) Check valve , this prevents the methane from flowing back to the filler. PIPES The methane piping from the filler to the pressure regulator/reduction unit is made from galvanised steel and covered in plastic (high pressure) and is located outside the passenger compartment; the piping from the pressure regulator/reduction unit to the methane injectors is in stainless steel. PRESSURE REGULATOR/REDUCTION UNIT The pressure reduction unit fig. 116 is installed in the engine compartment. from the value in the cylinder to the supply value for the methane injectors (about 6 bar) and keeps it constant in all operating conditions. 116 F0T0350 |