Turbocharging Device and Control Method for Controlling the Turbocharging Device
First Claim
1. A method for controlling an electrically assisted turbocharger (1;
-
20;
30;
40;
50) comprising a compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7);
a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine and driving the compressor wheel; and
an electric motor (4) for electrically driving the compressor wheel, wherein at least the turbine assembly (2) comprises a variation means (10;
21) for varying an operational condition of the turbine assembly (2);
the method comprising the steps of judging that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel;
controlling said variation means (10;
21) in accordance with a rotational speed of the engine (7), and operating the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine (7).
1 Assignment
0 Petitions
Accused Products
Abstract
A method for controlling an electrically assisted turbocharger (1,20,30,40,50) is provided. The turbocharger comprises a compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7), a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine (7) and driving the compressor wheel (2), and an electric motor (4) for electrically driving the compressor wheel. Furthermore, at least the turbine assembly (2) comprises a variation means (10,21) for varying an operational condition of the turbine assembly (2). The method comprises the steps of judging that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel, controlling said variation means (10,21) in accordance with a rotational speed of the engine (7) or in accordance with an engine load, and operating the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine 7.
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Citations
24 Claims
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1. A method for controlling an electrically assisted turbocharger (1;
-
20;
30;
40;
50) comprisinga compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7);
a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine and driving the compressor wheel; and
an electric motor (4) for electrically driving the compressor wheel, wherein at least the turbine assembly (2) comprises a variation means (10;
21) for varying an operational condition of the turbine assembly (2);
the method comprising the steps of judging that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel;
controlling said variation means (10;
21) in accordance with a rotational speed of the engine (7), andoperating the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine (7). - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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20;
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2. A method for controlling an electrically assisted turbocharger (1;
-
20;
30;
40;
50) comprisinga compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7);
a turbine assembly (2;
21) having a turbine wheel driven by an exhaust gas of the engine and driving the compressor wheel; and
an electric motor (4) for electrically driving the compressor wheel, wherein at least the turbine assembly (2) comprises a variation means (10;
21) for varying an operational condition of the turbine assembly;
the method comprising the steps of judging that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel;
controlling said variation means (10;
21) in accordance with an engine load, andoperating the electric motor (4) to drive the compressor wheel (7) in accordance with a target operational condition of the engine (7). - View Dependent Claims (3)
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20;
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13. A turbocharging device having an electrically assisted turbocharger (1;
-
20;
30;
40;
50) and a control means (ECU) for controlling said turbocharger (1;
20;
30;
40;
50), the turbocharger further comprising;
a compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7);
a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine (7) and driving the compressor wheel; and
an electric motor (4) for electrically driving the compressor wheel, wherein at least the turbine assembly (2) comprises a variation means (10;
21) for varying an operational condition of the turbine assembly (2);
whereinthe control means (ECU) judges that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel;
controls said variation means in accordance with a rotational speed of the engine (7), and operates the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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20;
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14. A turbocharging device having an electrically assisted turbocharger (1, 20;
-
30;
40;
50) and a control means (ECU) for controlling said turbocharger, the turbocharger further comprising;
a compressor assembly (3) having a compressor wheel for compressing a fluid to an engine;
a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine and driving the compressor wheel; and
an electric motor (4) for electrically driving the compressor wheel, wherein at least the turbine assembly (2) comprises a variation means (10;
21) for varying an operational condition of the turbine assembly (2);
whereinthe control means (ECU) judges that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel;
controls said variation means (10;
21) in accordance with an engine load, andoperates the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine (7). - View Dependent Claims (15)
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30;
Specification