TURBOCHARGER WITH A HYBRID JOURNAL BEARING SYSTEM
First Claim
1. An internal combustion engine comprising:
- an engine block defining a cylinder with a combustion chamber configured to receive an air-fuel mixture for combustion therein and configured to exhaust post-combustion gases therefrom; and
a turbocharger including;
a bearing housing defining a bearing bore;
a hybrid journal bearing system disposed within the bore and having a first journal bearing and a second journal bearing;
a shaft having a first end and a second end, the shaft being supported by the journal bearing system for rotation about an axis within the bore;
a turbine wheel fixed to the shaft proximate to the first end and configured to be rotated about the axis by the post-combustion gases; and
a compressor wheel fixed to the shaft proximate to the second end and configured to pressurize an airflow being received from the ambient for delivery to the cylinder;
wherein the first journal bearing is a semi-floating bearing and the second journal bearing is a full-floating bearing.
1 Assignment
0 Petitions
Accused Products
Abstract
A turbocharger for an internal combustion engine includes a bearing housing defining a bearing bore and a hybrid journal bearing system disposed within the bore. The hybrid journal bearing system includes first and second journal bearings. The first journal bearing is a semi-floating bearing and the second journal bearing is a full-floating bearing. The turbocharger also includes a shaft having a first end and a second end, wherein the shaft is supported by the journal bearing system for rotation about an axis within the bore. The turbocharger also includes a turbine wheel fixed to the shaft proximate to the first end and configured to be rotated about the axis by post-combustion gases emitted by the engine. Additionally, the turbocharger includes a compressor wheel fixed to the shaft proximate to the second end and configured to pressurize an airflow being received from the ambient for delivery to the engine.
32 Citations
20 Claims
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1. An internal combustion engine comprising:
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an engine block defining a cylinder with a combustion chamber configured to receive an air-fuel mixture for combustion therein and configured to exhaust post-combustion gases therefrom; and a turbocharger including; a bearing housing defining a bearing bore; a hybrid journal bearing system disposed within the bore and having a first journal bearing and a second journal bearing; a shaft having a first end and a second end, the shaft being supported by the journal bearing system for rotation about an axis within the bore; a turbine wheel fixed to the shaft proximate to the first end and configured to be rotated about the axis by the post-combustion gases; and a compressor wheel fixed to the shaft proximate to the second end and configured to pressurize an airflow being received from the ambient for delivery to the cylinder; wherein the first journal bearing is a semi-floating bearing and the second journal bearing is a full-floating bearing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A turbocharger for an internal combustion engine, the turbocharger comprising:
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a bearing housing defining a bearing bore; a hybrid journal bearing system disposed within the bore and having a first journal bearing and a second journal bearing; a shaft having a first end and a second end, the shaft being supported by the journal bearing system for rotation about an axis within the bore; a turbine wheel fixed to the shaft proximate to the first end and configured to be rotated about the axis by the post-combustion gases; and a compressor wheel fixed to the shaft proximate to the second end and configured to pressurize an airflow being received from the ambient for delivery to the cylinder; wherein the first journal bearing is a semi-floating bearing and the second journal bearing is a full-floating bearing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification