Turbocharger compressor temperature control systems and methods
AssigneeGM Global Technology Operations LLC
InventorsJoshua D. Cowgill, Joel Cowgill
Life of this patent
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Abstract
A control system for a vehicle includes a target boost module and a turbocharger control module. The target boost module determines a target boost for first and second turbochargers based on an engine torque request. Based on a temperature of a compressor of the second turbocharger, the turbocharger control module: selectively opens a first bypass valve that regulates exhaust bypassing a first turbine of the first turbocharger; and selectively closes a cutoff valve that regulates exhaust flow through both a second turbine of the second turbocharger and a second bypass valve. The second bypass valve regulates exhaust bypassing the second turbine of the second turbocharger.
Claims20
A control system for a vehicle, comprising:
- a target boost module that determines a target boost for first and second turbochargers based on an engine torque request;
- a turbocharger control module that, based on a temperature of a compressor of the second turbocharger:
- selectively opens a first bypass valve that regulates exhaust bypassing a first turbine of the first turbocharger;
- and
- selectively closes a cutoff valve that regulates exhaust flow through both a second turbine of the second turbocharger and a second bypass valve,
- wherein the second bypass valve regulates exhaust bypassing the second turbine of the second turbocharger.
A control method for a vehicle, comprising:
- determining a target boost for first and second turbochargers based on an engine torque request;
- and,
- based on a temperature of a compressor of the second turbocharger:
- selectively opening a first bypass valve that regulates exhaust bypassing a first turbine of the first turbocharger;
- and
- selectively closing a cutoff valve that regulates exhaust flow through both a second turbine of the second turbocharger and a second bypass valve,
- wherein the second bypass valve regulates exhaust bypassing the second turbine of the second turbocharger.
Dependencies are inferred from the claim text.