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MAN unveils latest heavy-duty Euro-6 engine

  • 10 July 2014
  • By Colin Barnett

MAN has revealed the new Euro-6 engine for the top end of its truck range.

Since the implementation of the new emissions standard, the highest rating in its range has been the 480hp D26, but the arrival of the D38 gives it a high power alternative again.

The 15.7-litre D38 replaces the old Euro-5 V8 models, which were considered both too heavy and too inefficient to take the line-up forward, and is available in nominal 520hp/2,500Nm, 560hp/2,700Nm and 640hp/3,000Nm ratings. Maximum torque is available from 930rpm in each case.

Key components of the engine, which has a bore and stroke of 170mm x 138mm, include single overhead camshaft operating an unusual design of domed head valves, two-stage sequential turbocharging, with charge-cooling between the two, and a sophisticated two-stage exhaust gas recirculation (EGR) system. The internal combustion process is such that the AdBlue consumption rate is reduced to less than 2.5% of diesel usage.

MAN claims that fuel consumption is reduced by up to 3% compared with its equivalent Euro-5 engines. The use of GRP for the cam cover and oil sump, and aluminium for the bell housing and rear engine mounts, contribute to a weight saving of 160kg compared with the V8.

The efficiency of the driveline is enhanced by the availability of a 2.5:1 final drive, the latest version of the ZF AS-Tronic 2 transmission and the introduction of MAN’s own take on adaptive cruise control, which it calls Efficient Cruise. CM has driven a range of vehicles with the new engines, and you can read our impressions in a forthcoming issue.

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Article source: http://www.commercialmotor.com:80/latest-news/man-unveils-latest-heavy-duty-euro-6-engine