METHOD FOR CONTROLLING POWERTRAIN PUMPS
First Claim
1. A method of controlling a first pump supplying a fluid to a transmission within a powertrain, comprising:
- sensing a requested power for the powertrain, wherein the requested power substantially meets the needs of the powertrain;
sensing an excess power for the powertrain, wherein the excess power is non-zero and is not included in the requested power;
sensing a triggering condition, wherein the triggering condition occurs in response to the ability to convert the excess power into heat in the transmission;
determining a calibrated baseline command for the first pump, wherein the calibrated baseline command is configured to supply the fluid based upon the requested power;
determining that an operating temperature of the transmission is below a minimum-efficiency temperature;
determining a first dissipation command for the first pump, wherein the first dissipation command is configured to consume the excess power with the first pump; and
operating the first pump at a combined command equal to the calibrated baseline command plus the first dissipation command.
4 Assignments
0 Petitions
Accused Products
Abstract
A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline plus the dissipation commands.
14 Citations
14 Claims
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1. A method of controlling a first pump supplying a fluid to a transmission within a powertrain, comprising:
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sensing a requested power for the powertrain, wherein the requested power substantially meets the needs of the powertrain; sensing an excess power for the powertrain, wherein the excess power is non-zero and is not included in the requested power; sensing a triggering condition, wherein the triggering condition occurs in response to the ability to convert the excess power into heat in the transmission; determining a calibrated baseline command for the first pump, wherein the calibrated baseline command is configured to supply the fluid based upon the requested power; determining that an operating temperature of the transmission is below a minimum-efficiency temperature; determining a first dissipation command for the first pump, wherein the first dissipation command is configured to consume the excess power with the first pump; and operating the first pump at a combined command equal to the calibrated baseline command plus the first dissipation command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a pump supplying a fluid to a transmission within a powertrain, comprising:
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sensing a requested power for the powertrain, wherein the requested power substantially meets the needs of the powertrain; sensing an excess power for the powertrain, wherein the excess power is non-zero and is not included in the requested power; sensing a triggering condition, wherein the triggering condition occurs in response to the ability to convert the excess power into heat in the transmission; determining a calibrated baseline command for the pump, wherein the calibrated baseline command is configured to supply the fluid based upon the requested power; determining that an operating temperature of the transmission is below a maximum temperature; determining a dissipation command for the pump, wherein the dissipation command is configured to consume the excess power with the pump; and operating the pump at a combined command equal to the calibrated baseline command plus the dissipation command. - View Dependent Claims (11, 12, 13)
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14. A method of controlling a pump supplying a fluid to a transmission within a powertrain, comprising:
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sensing a requested power for the powertrain, wherein the requested power substantially meets the needs of the powertrain; sensing an excess power for the powertrain, wherein the excess power is non-zero and is not included in the requested power; determining that the powertrain is applying negative acceleration to the vehicle; determining a calibrated baseline command for the pump, wherein the calibrated baseline command is configured to supply the fluid based upon the requested power and wherein the pump is a mechanically-driven pump; determining that an operating temperature of the transmission is below a maximum temperature; determining a dissipation command for the pump, wherein the dissipation command is configured to consume the excess power with the pump; and operating the pump at a combined command equal to the calibrated baseline command plus the dissipation command.
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Specification