Electronically controlled slide valve pumps, four-valve design and cooled exhaust gas recirculation are features of the Euro 3 engines premiered with the launching of the MAN heavy-duty truck TGA at the turn of the millennium. With exhaust gas recirculation, which withdraws part of the exhaust gas before the exhaust turbine, cools it and adds it back to the compressed intake air after the intercooler, there is a drop in the combustion temperature. That means reduced nitrogen oxide emissions -- 30 percent less than Euro 2 engines for the same attractive fuel consumption figures. MAN engines not only improve in performance, their new EVB also means a big increase in the braking power of the retarder.

MAN EVB (exhaust valve brake)

Conventional exhaust valve brakes make insufficient use of the engine's braking energy. In the EVB, MAN engineers make use of an effect for decompression that is responsible for brief opening of the exhaust valve. In the braking operation a plunger in the rocker arm holds the exhaust valve opened, the pressure on the downwards moved plunger decreases, the braking power increases. By throttling the exhaust gas, both the upward and downward movement of the plunger can be used for braking. The further development EVBec (ec = electronically controlled), by controlling the closing angle of the exhaust throttle valve, allows three-step setting of braking power and a very much improved delay in the low range of engine speed. At the same time the possibility of controlling the braking power enables integration into intelligent brake management, MAN BrakeMatic.

New standards in commercial vehicle engines

A new generation of MAN engines causes a stir in the truck industry early in 2004. After four years of development, MAN presents the D20 common-rail series to take over from the legendary six-cylinder D28. MAN still holds with the magic formula 6. What speaks in favour of maintaining the concept of the six-cylinder inline engine is the entire absence of those inertial forces and moments of inertia that need such elaborate countermeasures in other designs. The new 10.5-liter four-valve engines are very much more compact and lightweight than their predecessors, the consequence of downsizing. The new units seem to solve the problem of squaring the circle -- they are more powerful, lighter, more silent. The result is also felt in the fuel consumption, which is as much as five percent lower than in the tried and tested D28 engines. The D20 comes rated from 270 to 440 hp and with common-rail injection, exhaust gas recirculation and PM-KAT® -- no need for additives -- adheres to the limits of the Euro 4 standard. Shortly afterwards, for higher power requirements, MAN introduces the virtually identical six-cylinder inline D26, with 12.4 liters capacity and rated from 480 to 540 hp. For especially demanding operators there is a new V8 engine, called a D28 because of its bore, that also sets new standards with 680 hp and 3000 Nm. Europe's most powerful series manufactured truck, the MAN TGX V8, and its companions of the heavyweight TGS and TGX series are awarded the title "Truck of the Year 2008".

The new Common rail engines of the Type MAN D28 LOH CR offer power ranges from 480 up to 530 hp and a maximum torque of up to 2400 Nms.