The performance of an internal combustion engine can be increased by adding turbocharging. A turbocharger compresses the air so that more oxygen flows into the combustion chamber. In this way, more fuel is burned and the power output of the engine increases accordingly. The turbocharger is driven by exhaust gas, which makes turbocharged diesel engines very efficient. mtu develops this key technology for high-performance engines in-house.
Turbocharger development and production at mtu
Turbocharging is an integral component of the engine design concept. It shapes the characteristics of the engine more than almost any other system, as it affects its economy, dynamics and emission characteristics. This is why turbocharging is one of mtu
’s key technologies. mtu
has a tradition of maintaining the expertise for developing and producing its turbochargers in-house. The range of mtu
turbochargers extends across engine power ratings from 400 to 10,000 kW. Turbochargers are purchased for engine designs in which synergy effects with the commercial vehicles sector can be used.
The global market for turbochargers is dominated by car and commercial vehicle applications. By comparison, the number of turbochargers fitted to industrial engines is negligible. The result is that turbocharger manufacturers rarely produce specialized designs for industrial engine manufactures. Where customers’ requirements of the engines are such that they cannot be satisfied by purchased turbochargers, mtu develops and produces the turbochargers itself.
Taking all engine series into account, mtu produces roughly 50 percent of the turbochargers in-house. The present range of mtu turbochargers encompasses five series — the ZRT 12, ZRT 13, ZRT 35, ZRT 36 and ZRT 57 (see Figure 1), and is based on a concept of using as many common parts as possible. In the case of the new Series 4000 engine for rail applications with regulated two-stage turbocharging, for instance, all three turbochargers in the system are identical. This simplifies the logistics in production and the supply of spare parts to customers.