Prime Mover Magazine

CNG engine marks milestone for Scania New Truck Generation

Commercial vehicle manufacturer, Scania, has launched the OC09, a compressed natural gas engine.

Based on the 9.0-litre 5-cylinder engine, the 0C09 works using spark plugs and complete combustion in accordance with the Otto principle.

A Scania P 340 6x2 has been fitted with the engine which is paired to Scania's automated Opticruise gear-changing system.

Throughout the research and development process, Scania Engineer Folk Fritzson said the goal was to achieve the best possible driveability.

"The performance and characterisitics should correspond to that of a modern diesel engine," he said.

“In combustion, there is no difference between LNG and CNG," said Fritzson.

"CNG usually provides a range of up to 500km. The latter is more than sufficient for many customers, for example in regional transports with a return to the home base and refuelling every day. The mileage that can be achieved before refuelling is required also depends on the type of driving and usage, and how hilly the route is.”

Similar to a petrol engine, the Scania gas engines work on complete combustion of fuel and oxygen in which combustion is initiated by spark plugs. 

The pre-mixing of the fuel takes place upon entry into the cylinders.

Scania Australia confirmed it had signed a memorandum of understanding with the NVG Group – infrastructure suppliers and consultants for natural gas.

In a statement the company said it would ensure operators of Scania’s CNG fuelled vehicles would have access to a reliable supply of gas.

According to Scania, its engineers have turned the tank valves backwards, away from the direction of travel.

This reduces the risk of the valves becoming damaged if hit by stones or gravel.

Natural gas used in the tanks can reportedly reduce Co2 emissions by 15-20 per cent.

Bio-methane gas, in contrast, promises reductions of Co2 of up to 90 per cent.

Regardless of the type of gas used, the driveability of Scania’s gas engines is in line with what conventional diesel engines can offer in terms of torque and power according to Henrik Eng, Product Director Urban, Scania Trucks.

“Gas, and of course bio-methane in particular, are of particular interest from a European perspective with the potential for reductions in both CO2 and other emissions,” he said.

“This engine is the starting point for Scania’s extensive offering for sustainable transport combined with the New Truck Generation.”

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