Charged internal combustion engine

#1. Field of the Invention

#The invention refers to a charged internal combustion engine.

#2. Description of the Related Art

#Preferred executions of the invention are explained in references to the attached drawings. They show in:

#FIG. 1 a schematic representation of an internal combustion engine with one-step turbocharging and an supplemental compressor powered by an electric motor in a first execution based on the invention.

#FIG. 2 a schematic of an internal combustion engine with simple turbocharging and supplemental compressor with secondary air channels, turbine bypass and exhaust return.

#FIG. 1 shows an internal combustion engine 1, which on the fresh gas side 2 is connected to the compressor of a turbocharger 3 and a supplemental compressor 4. The supplemental compressor 4 is connected to the turbocharger compressor 3 in series, and arranged, in the flow direction, in front of the turbocharger compressor 3. The supplemental compressor 4 is powered by an electric motor 5. The turbine 7 of the turbocharger is connected to the internal combustion engine 1 on the exhaust side 6. A closing or switching means 8 is arranged between the supplemental compressor 4 and the turbocharger compressor 3. Using the switch means 8, the turbocharger compressor 3 can draw from its own intake area 9 as well as from the supplemental compressor 4. The supplemental compressor 4 draws from the intake area 10. If necessary, two air mass measurers or meters as well as two filters are provided.

#FIG. 2 shows an internal combustion engine with simple turbocharging and an electrically powered supplemental compressor, where the main design corresponds with FIG. 1. A closing means 11 is arranged in flow direction behind the supplemental compressor 4, parallel to the closing or switching means 8, with which the mass flow in the secondary air channels 12 can be controlled. A charge cooler 13 is arranged in flow direction behind the turbocharger compressor 3, which cools the fresh compressed gas before entry into the internal combustion engine 1. Operation without turbocharging is possible with a bypass 14, which diverts exhaust gas to the exhaust side of the turbine 7 of the turbocharger. The switching means 15 controls the mass flow, which is conducted on the fresh gas side using the exhaust return 16.

#FIG. 3 shows an internal combustion engine with all components from FIG. 2. In this execution, the intake pipe assembly 18 includes the intake pipe 17, a throttle valve 19 and a supplemental compressor 4, arranged sequentially going in the upstream direction. In addition, drive 5 of the supplemental compressor 4 and the switching or throttling means 20 are arranged in front of and behind the supplemental compressor 4 in the intake pipe assembly 18. Supplemental compressor 4 and turbocharger compressor 3 draw raw air from the same intake area 9, in which the air mass meter 21 and air filter 22 are connected.