Second-generation Euro 6 with lower fuel consumption

Second-generation Euro 6 with lower fuel consumption

Scania introduces new Euro 6 engines with features that further boost efficiency. Second-generation 450 and 490 hp Euro 6 engines provide fuel savings of up to 2 percent. A unique, SCR-only 410 hp six has an extra eco-nomic edge. New 520 and 580 hp Euro 6 V8s provide exceptional performance and character. Proven EGR and SCR technologies are combined to provide optimum performance in all market segments.

The Euro 6 emission standard calls for a fine balance between the combustion and aftertreatment processes. Scania is using its vast experience of both EGR and SCR to implement an optimal technical solution for each output level, as well as for individual applications.

Scania customers now have a choice of nine Euro 6 outputs, ranging from the 250 hp 9-litre unit to the 580 hp V8. Additional outputs will follow. In addition there are two gas engines, adaptable to run on biogas, compressed natural gas (CNG) or liquefied LNG.

V8s with exceptional torque

The only Euro 6 V8s in the market, the new engines are based on the 16.4-litre platform introduced with the 730 hp unit. They have typical Scania V8 traits, with plenty of lugging power from low down the rev range. Like Scania’s inline 13-litre engines, the new V8s have torque-to-power ratios in excess of 5.

520 hp, 2,700 Nm at 1,000-1,300 r/min, EGR+SCR
580 hp, 2,950 Nm at 1,000-1,350 r/min, EGR+SCR
730 hp, to be released later

The performance of the new 580 hp Euro 6 V8 is similar to the 620 hp Euro 5 thanks to its wider torque peak and ‘fat’ power curve. Fuel consumption of a Euro 6 V8 engine worked hard is equivalent to Euro 5. The exhaust brake output is 320 kW at 2,400 r/min.

 

Scania’s Euro 6 V8 engines feature common-rail fuel injection (Scania XPI) and a variable-geometry turbocharger (VGT) mounted at the rear.

 

A newly-developed water-cooled EGR system is fitted low down underneath the RH cylinder bank. The silencer unit for the V8 engines is somewhat larger with higher capacity than for inline engines. The top-output 730 hp V8 is due for release by the time Euro 6 becomes mandatory.

Further refined 6-cylinder engines

Four 12.7-litre engines constitute Scania’s six-cylinder Euro 6 offering.

370 hp, to be released later
410 hp, 2,150 Nm at 1,000-1,300 r/min, SCR
450 hp, 2,350 Nm at 1,000-1,300 r/min, EGR+SCR
490 hp, 2,550 Nm at 1,000-1,300 r/min, EGR+SCR

 

The 450 and 490 hp engines are based on further refinements of the 440 and 480 hp units, which have been proven in the hands of operators since early 2011. The 450 hp engine is available in P-, G- and R-series and the 490 hp unit in G- and R-series trucks.

The 450 and 490 hp engines have been further developed in several respects, including the engine management system and a revised intake system that main-tains sufficiently high exhaust temperatures without the need for an intake throttle. The exhaust brake is rated at 256 kW at 2,400 r/min. A new disengaging air com-pressor is being introduced across the Euro 6 engine range. The compressor has a pneumatically-controlled coupling that disengages when the compressor is idling, contributing to a fuel saving of up to 1 percent, depending on operation.

Euro 6 trucks for long-haulage should generally be specified for highway cruising at less than 1,200 r/min to minimise fuel consumption. The high torque delivered already from low revs in combination with automated gearchanging means that the low cruising revs save fuel without requiring extra attention from the driver.

Tests have shown that Scania’s second-generation Euro 6 engines are 2-3 percent more economical than the first ones.

Read more in the full PDF release

Read the full press release here about second-generation Euro 6. (PDF)