Caterpillar Motoren Gmbh & Co. Kg

Markus Krueger

Volker Abraham

Michael Sturm

Torben Gravert

Jan Borchardt

Udo Wachtel

Helge Seidel

Ole Ehlert

Andreas Banck

Hendrik Johannes Lange

The present invention relates to a charge air cooling unit comprising a first charge air cooler having a first end face provided with a first cooling fluid inlet and a first cooling fluid outlet and a second charge air cooler having a second end face provided with a second cooling fluid inlet and a second cooling fluid outlet. Specifically, the second charge air cooler is arranged adjacent to the first charge air cooler such that the first end face and the second end face are oriented in the same direction. Further, the charge air cooling unit comprises a manifold unit connected to the first end face and the second end face for guiding a cooling fluid through the first charge air cooler and the second charge air cooler.

Charge air cooling unit for a two-staged turbocharger

A two-stage turbocharged internal combustion engine comprises a low-pressure stage turbocharger mounted at a first end side of an engine block and a high-pressure stage turbocharger mounted at the same first end side of the engine block. The respective turbochargers are mounted via a mounting structure, Which also accommodates the charge air coolers associated with the turbochargers. In order to obtain a compact arrangement and reduce a length of pipe connections between the different components, the different charge air coolers are mounted to mounting structure such that they overlap in a plan view of the internal combustion engine. Further, flow directions of charge air in the different charge air coolers are opposite to each other.

Two-stage turbocharged internal combustion engine

A control system is disclosed for operating an internal combustion engine. The control system includes a control unit configured for providing a part load mode that is optimized for slow operation of the engine at loads up to an upper part load limit in the range from 40% to 75% of a maximum engine load. The control unit is also configured for providing a high load mode for engine loads above the upper part load limit. In the part load mode, at least one inlet valve is closed at a closing angle later than in the high load mode.

Operating internal combustion engines

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Weede, Germany

Markus Krueger