A supercharger for an internal combustion engine including a turbocompressor having at least one compressor impeller and a suction side and a pressure side, a flywheel mass for storing drive energy, an auxiliary motor for driving the compressor impeller and the flywheel mass, and a first shut-off el
A supercharger for an internal combustion engine including a turbocompressor having at least one compressor impeller and a suction side and a pressure side, a flywheel mass for storing drive energy, an auxiliary motor for driving the compressor impeller and the flywheel mass, and a first shut-off element which is arranged on the suction side of the turbocompressor, the region between the first shut-off element and the compressor impeller of the turbocompressor forming a suction-side compressor air space, and the turbocompressor being designed in such a way that, after the first shut-off element is closed, the suction side compressor air space can be substantially evacuated.
대표청구항▼
1. A method for operating a supercharger together with an internal combustion engine, the supercharger having a turbocompressor with at least one compressor impeller and with a suction side and a pressure side, an auxiliary motor for driving the compressor impeller, a flywheel mass for storing drive
1. A method for operating a supercharger together with an internal combustion engine, the supercharger having a turbocompressor with at least one compressor impeller and with a suction side and a pressure side, an auxiliary motor for driving the compressor impeller, a flywheel mass for storing drive energy, and a first shut-off element which is arranged on the suction side of the turbocompressor, the region between the first shut-off element and the compressor impeller of the turbocompressor forming a suction-side compressor air space; the method comprising: constant driving of the at least one compressor impeller of the turbocompressor and the flywheel mass by the auxiliary motor;closing of the first shut-off element and substantially evacuating the suction-side compressor air space by an inherent compressor capacity of the turbocompressor, thereby performing a standby operation of the supercharger; andopening of the first shut-off element only when the internal combustion engine cannot provide a predefined torque, the auxiliary motor being assisted, during driving of the compressor impeller of the turbocompressor, by the drive energy which is stored in the flywheel mass, thereby performing a supercharging operation of the supercharger; wherein the auxiliary motor is an electric motor and is supplied with an electric current during both the standby operation and the supercharging operation by an on-board electrical system of a vehicle which comprises the internal combustion engine, and wherein the electric current which is drawn by the electric motor is limited. 2. The method as claimed in claim 1, wherein the supercharger is used in addition to an exhaust gas turbocharger, and the first shut-off element is opened only when the internal combustion engine cannot provide a predefined torque solely in cooperation with the exhaust gas turbocharger. 3. The method as claimed in claim 1 or 2, wherein the supercharger has a second shut-off element on the pressure side of the turbocompressor, the region between the compressor impeller of the turbocompressor and the second shut-off element forms a delivery-side compressor air space, and the method additionally comprises substantially evacuating the delivery-side compressor air space. 4. The method as claimed in claim 3, wherein the evacuation of the delivery-side compressor air space takes place by means of a vacuum pump of a brake system of a vehicle which comprises the internal combustion engine. 5. The method as claimed in claim 3, wherein the second shut-off element is transferred into a closed state in the context of the operation of evacuating the delivery-side compressor air space. 6. The method as claimed in claim 5, wherein the second shut-off element passes automatically into the closed state. 7. The method as claimed in claim 1, wherein the electric current is limited in such a way that the on-board electrical system does not experience any voltage dip which lies outside predefined specification limits of electronic control units of the vehicle. 8. The method as claimed in claim 1, wherein at least the first shut-off element is actuated actively by a control device. 9. The method as claimed in claim 1, wherein the electric current which is drawn by the electric motor is limited to 100 Amperes. 10. A supercharger for an internal combustion engine, comprising: a turbocompressor having at least one compressor impeller, the turbocompressor having a suction side and a pressure side;a flywheel mass for storing drive energy;an auxiliary motor for driving the compressor impeller and the flywheel mass; anda first shut-off element which is arranged on the suction side of the turbocompressor, wherein a supercharging operation mode of the supercharger is defined when the first shut-off element is in its opened condition;the region between the first shut-off element and the compressor impeller of the turbocompressor forming a suction-side compressor air space, and the turbocompressor being designed in such a way that, after the first shut-off element is closed, the suction-side compressor air space is configured to be substantially evacuated by an inherent compressor capacity of the turbocompressor thereby defining a standby operation mode of the supercharger; wherein the auxiliary motor is an electric motor which is supplied with an electric current in both the standby operation mode and the supercharging operation mode by an on-board electrical system of a vehicle and the supercharger further comprises a control device configured to limit the electric current draw of the electric motor. 11. The supercharger as claimed in claim 10, wherein a second shut-off element is arranged on the pressure side of the turbocompressor, the region between the compressor impeller of the turbocompressor and the second shut-off element forms a delivery-side compressor air space, and further comprising a pump configured to substantially evacuate the delivery-side compressor air space. 12. The supercharger as claimed in claim 11, wherein the device for substantially evacuating the delivery-side compressor air space is a vacuum pump of a brake system of a vehicle. 13. The supercharger as claimed in claim 11, characterized in that the second shut-off element is a nonreturn valve. 14. The supercharger as claimed in claim 10, wherein the turbocompressor is a radial compressor. 15. The supercharger as claimed in claim 10, wherein at least the first shut-off element is configured to be actuated actively by a control device. 16. The supercharger as claimed in claim 10, wherein the control device is further configured to limit the electric current draw of the electric motor to 100 Amperes.
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이 특허에 인용된 특허 (8)
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