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VOLVO 7900 CNG LHD, RFS, 4×2, Euro 5

Buslovers will share knowledge about VOVO bus engines using CNG technology VOLVO BUS and LPG. Many of us who do not understand the specification machine VOVO 7900 CNG buses, will discuss about the transmission buslovers VOLV, Exhaust and Cooling System, the following G9B300 VOVO reviews of CNG busesVOLVO 7900 CNG LHD 300x88 VOLVO 7900 CNG LHD, RFS, 4x2, Euro 5
Engine Volvo 7900 CNG
The G9B is an in-line six-cylinder gas engine with turbocharger and intercooler. The G9B is a vertical 9.4-litre in-line six-cylinder gas engine producing 300 hp, equipped with a turbocharger and intercooler. On-board diagnostic, Volvo EMS2 engine control system,Engine software protection and on-board diagnostic to detect, warn and to take action for malfunctions leading to increased emission. Engine fulfills Euro 5 and EEV emission requirements.

G9B300
Bore ………………………………………….120 mm
Stroke ……………………………………….138 mm
Displacement ……………………..9.36 dm3 (l)
Compression ratio……………………..10.25:1
Idling speed……………………………..600 rpm
Max power at 1900 rpm ………………………………………………223 kW/300 hp
Max torque at 1400 rpm ………..1400 Nm
Fuel consumption…………………………………………ca 45 to 55 m3 / 100 km
Engine encapsulation……77 or 80 dB(A)
Fuel tanks
Single gas tank capacity…………214 litres
Gas tanks……….5 or 6 pcs of 1070 l or 1284 l capacity.
Max pressure filling…………below 26 MPa or the temper.

compensated pressure
giving a settled pressure:……………………………………..20MPa at 150C
Pressure reduction by pressure regulator 10 bar
Available: 1 or 2 CNG recepticals (also fast drain type for fast gas drain) of German or ISO version.

Exhaust and Cooling System
Fluid cooled, pressurized system. Engine driven gear pump circulates the coolant. The radiator module and fan system is mounted in the rear roof part. Stainless steel exhaust system, with exhaust outlet located in the upper left part of the rear wall. The radiator protrudes above the roof level and is angle inclined to improve air flow and cooling. Radiator fan is hydraulically driven. Lambda sensor minimises environmentally dangerous substances – detects oxygen amount indicating if the combustion is complete ; mounted in the exhaust pipe immediately after the turbocharger.

How about a review buslovers CNG bus, hopefully on a description of CNG buses, CNG volv vovo LGP and can add to knowledge is buslovers, may be useful.


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