Internal combustion engine
AssigneeMTU Friedrichshafen GmbH
InventorJoerg Heiermann
Life of this patent
Estimating the term…
Abstract
In an exhaust gas turbocharger system for charging an engine including a compressor arrangement at a charging fluid side LL and a turbine arrangement at an exhaust gas side AG, a further compressor which is driven by a separate controllable drive and whose primary side is connected to the charging fluid side LL while its secondary side is connected to the exhaust gas side is provided for compressing charge air taken from the charging fluid side and supply it to the exhaust gas side for assisting driving the exhaust gas turbines so as to maintain them at relatively high speeds in transition periods including engine idling.
Claims14
An internal combustion engine (100, 200) comprising:
- an engine (10) having an exhaust gas side (AG) and a charging fluid side (LL) and,
- a charging system with
- a two-stage exhaust gas turbocharger system (20) for charging the engine (10) including a compressor arrangement at the charging fluid side (LL) and a turbine arrangement at the exhaust gas side (AG) comprising a low pressure stage with a low pressure turbocharger having a low pressure compressor (22) driven by a low pressure turbine (21), a high pressure stage including a high pressure turbocharger having a high pressure compressor (24) driven by a high pressure turbine (23),
- a further compressor (41) having a primary side (41.1) connected at the charging fluid side (LL) and a secondary side (41.2) connected at the exhaust gas side (AG) and being driven by a separately controllable drive device (43, 44),
- the charging system further including:
- an exhaust gas recirculation system (30) with a recirculation line (39) extending from an engine exhaust manifold (1) to an engine intake manifold (2) for returning exhaust gas from the exhaust gas side (AG) of the engine (10) to the charging fluid side (LL) of the engine (10) and
- the further compressor (41) for compressing charge air having the primary side (41.1) which is connected to an outlet side (22.1) of the low pressure compressor (22) and the secondary side (41.2) being connected to an intake/suction side (23.1) of the high pressure turbine (23).
Dependencies are inferred from the claim text.