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MAN new engines for Euro 6 B and C.
With the requirements of the Euro 6 emission standard about to change in 2017, MAN has taken the opportunity to overhaul its range of engines.
The new engines offer more torque and greater performance with lower consumption. Furthermore, MAN has introduced a new, more reactive catalyst material for the SCR system in the new D38, D26 and D20 engines. Combustion and exhaust gas aftertreatment are thus optimised to such an extent that consumption decreases even further and emissions stay low.
For the first time, the new D08, D20, D26 and D38 engines in all performance classes can also be operated with paraffinic fuels according to EN 15940, such as hydrotreated vegetable oils (HVO).
In comparison to its predecessor, the new MAN D26 engine boasts even more torque and performance. It now comes complete with an extra 20 HP in each class as well as a greater torque of 200 Nm, which means that the D26 engine is available in new performance classes of 420, 460 or 500 HP.
MAN now offers the TGS and TGX series with the new D26 engine to meet customer requirements for the 500 HP class. With its performance range of up to 500 HP, not to mention its high torque, increased fuel efficiency, durability, and low weight, the new MAN D26 engine is one of the most effective drive units in its class.
Like the new MAN D38 engine, the new D26 offers a whole host of different technologies for reducing consumption. It is also fitted with new, low-friction steel pistons and fire rings, optimised oil cooling with thermostat, and sensor-controlled fan speed.
In addition, MAN has also reworked the turbo charger for the new D26, which now responds even faster due to its optimized efficiency in both the high- and low-pressure phases, particularly during mid-range acceleration at moderate speeds. Driving dynamics are vastly improved with the new D26, offering an enhanced torque curve and greater flexibility.
Optimised exhaust gas recirculation
The new D26 benefits from optimised exhaust gas recirculation, which results in a better admixture of the recirculated exhaust gases across all cylinders, along with improved charge cycles and enhanced combustion processes. These measures considerably reduce the level of nitrogen oxide found in the exhaust gas.
Regulated coolant pump
Yet another innovation of the new MAN D26 is a regulated coolant pump. Unlike the previous unregulated and constantly rotating coolant pumps, the fully engine speed-regulated design allows for coolant to be circulated as and when required. The pump performance is regulated continuously between 20 and 95 percent by means of a Visco clutch.
This means that when demand for coolant is low – for example in long-haul transport – 80 per cent of the mechanical power required by the coolant pump can be reduced, resulting in significant fuel savings potential. At the same time, the engine also reaches operating temperature more quickly in the warm-up phase, which in turn reduces overall wear.
The new generation of the MAN D26 engine is supplied with the EVBec electronically controlled exhaust valve brake with a brake output of 325 kW (at 2400 rpm) as series standard.
Its efficiency and direct incorporation into the brake management system support efficient and fuel-saving operation with a simultaneous reduction in wear on the wheel brakes and drivetrain components. It even makes a significant contribution to driving safety. This enhanced EVBec can be regulated continuously when activated via the brake management system in applications such as additional braking via the MAN BrakeMatic, the standard cruise control function, MAN’s EfficientCruise GPS cruise control, or the ACC Adaptive Cruise Control. If the driver manually activates the sustained-action braking function via the stalk switch, the braking torque can be controlled in stages.
The brake management system then automatically controls the exhaust valve brake in five phases. If the vehicle also has a retarder, this is controlled in combination with the exhaust valve brake in six phases.
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