TURBOCHARGER OPERATING SYSTEM AND METHOD FOR AN INTERNAL COMBUSTION ENGINE
First Claim
8. A turbocharger system for an internal combustion engine, said turbocharger system comprisinga turbocharger apparatus operatively connected with the engine;
- said turbocharger apparatus comprising;
an elongated center housing having a hollow central bore formed therethrough, and having first, second and third oil routing channels formed therein,a turbine member comprising a shaft portion extending through the central bore of the elongated center housing, said turbine member having an intake turbine attached to a first end of the shaft portion, and an exhaust turbine attached to a second end of the shaft portion;
a first bearing assembly and second bearing assembly, each operatively supporting said turbine member;
said first and second bearing assemblies are axially separated from each other;
said first bearing assembly connected to said first oil routing channel, and said second bearing assembly connected to said second oil routing channel;
an electronic control unit;
a first oil circuit connected to said third oil routing channel, and operable to provide oil to the turbocharger apparatus at a first pressure level;
an second oil circuit connected to each of said first and third oil routing channels, and operable to provide oil at a second pressure level which is one of same or different from the first pressure level; and
a plurality of operational sensors mounted on the engine;
wherein during operation, said electronic control unit is operable to control operation of the second oil circuit based in part on the input received from the plurality of operational sensors mounted on the engine for achieving desired pre-loading of the first and second bearing assemblies.
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Accused Products
Abstract
A method of operating a turbocharger apparatus on an internal combustion engine, having a first oil circuit and a second oil circuit, includes steps of sensing a plurality of engine operating parameters via a plurality of sensors associated with the internal combustion engine; providing oil to the engine from the first oil circuit at a first pressure level; controlling operation of the second oil circuit for said engine via an electronic control unit, based on the sensed engine operating parameters; and applying a variable hydraulic preload to said first and second bearing assemblies via the operation of the second oil circuit, wherein oil from the second oil circuit is provided at a second pressure level which is different from the first pressure level. A system usable for carrying out such method is also described.
14 Citations
20 Claims
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8. A turbocharger system for an internal combustion engine, said turbocharger system comprising
a turbocharger apparatus operatively connected with the engine; -
said turbocharger apparatus comprising; an elongated center housing having a hollow central bore formed therethrough, and having first, second and third oil routing channels formed therein, a turbine member comprising a shaft portion extending through the central bore of the elongated center housing, said turbine member having an intake turbine attached to a first end of the shaft portion, and an exhaust turbine attached to a second end of the shaft portion; a first bearing assembly and second bearing assembly, each operatively supporting said turbine member;
said first and second bearing assemblies are axially separated from each other;
said first bearing assembly connected to said first oil routing channel, and said second bearing assembly connected to said second oil routing channel;an electronic control unit; a first oil circuit connected to said third oil routing channel, and operable to provide oil to the turbocharger apparatus at a first pressure level; an second oil circuit connected to each of said first and third oil routing channels, and operable to provide oil at a second pressure level which is one of same or different from the first pressure level; and a plurality of operational sensors mounted on the engine; wherein during operation, said electronic control unit is operable to control operation of the second oil circuit based in part on the input received from the plurality of operational sensors mounted on the engine for achieving desired pre-loading of the first and second bearing assemblies. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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15-1. A method according to claim 14, wherein the sensed engine operating parameters include engine speed, intake manifold pressure, engine temperature, and exhaust back pressure.
Specification