Auxiliary power unit for hybrid electric vehicle
First Claim
1. An alternator/starter oil cooling system for a hybrid electric vehicle having an auxiliary power unit, comprising:
- an alternator/starter of the auxiliary power unit having a rotor and a stator, the rotor being mounted onto a drive shaft of the hybrid electric vehicle, the stator having a winding stack on a core of the stator;
a housing containing the alternator/starter;
means for conducting heat from inside the alternator/starter, the alternator/starter being cooled at an outside of the alternator/starter, the conducting heat means being disposed at an end of the winding stack of the stator;
first cooling means for cooling heat on the outside of the alternator/starter, the first cooling means being disposed around the conducting heat means;
second cooling means, disposed around the winding stack of the stator, for cooling heat on the winding stack of the stator;
first seal means, disposed between the housing and the alternator/starter, for sealing the first cooling means to prevent a cooling material from leaking into the alternator/starter, cooling contaminations are eliminated inside the alternator/starter;
second seal means, disposed around the first cooling means, having a wall for sealing the second cooling means to prevent the cooling material from leaking into the alternator/starter;
cooling material inlet means, mounted on the housing and connected to a pipe, for allowing the cooling material to flow into the pipe which is in a fluid communication with the first and second cooling means;
cooling material collecting means, mounted to an end of the first and second cooling means, for collecting the cooling material after passing through the first and second cooling means; and
cooling material outlet means, disposed at an end of the cooling material collecting means, for allowing the cooling material to flow out of the housing.
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Accused Products
Abstract
An auxiliary power system includes an engine balance system, an integrated alternator/starter, a thermal management system, noise-vibration-harshness control system, an emissions/fuel economy system, an APU master control unit, and a vehicle control system. The thermal management system includes an alternator/starter cooling assembly for cooling an alternator/starter in the auxiliary power system, an engine lubricating/cooling assembly for cooling an engine in the auxiliary power system, an assembly for collecting a cooling material after passing through the alternator/starter and the engine, an assembly for scavenging the cooling material from the collecting assembly to a first heat exchanger, an assembly for circulating the cooling material back to the alternator/starter and the engine, and a second heat exchanger which is disposed on the circulating assembly between the first heat exchanger and an alternator/starter inlet.
93 Citations
29 Claims
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1. An alternator/starter oil cooling system for a hybrid electric vehicle having an auxiliary power unit, comprising:
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an alternator/starter of the auxiliary power unit having a rotor and a stator, the rotor being mounted onto a drive shaft of the hybrid electric vehicle, the stator having a winding stack on a core of the stator; a housing containing the alternator/starter; means for conducting heat from inside the alternator/starter, the alternator/starter being cooled at an outside of the alternator/starter, the conducting heat means being disposed at an end of the winding stack of the stator; first cooling means for cooling heat on the outside of the alternator/starter, the first cooling means being disposed around the conducting heat means; second cooling means, disposed around the winding stack of the stator, for cooling heat on the winding stack of the stator; first seal means, disposed between the housing and the alternator/starter, for sealing the first cooling means to prevent a cooling material from leaking into the alternator/starter, cooling contaminations are eliminated inside the alternator/starter; second seal means, disposed around the first cooling means, having a wall for sealing the second cooling means to prevent the cooling material from leaking into the alternator/starter; cooling material inlet means, mounted on the housing and connected to a pipe, for allowing the cooling material to flow into the pipe which is in a fluid communication with the first and second cooling means; cooling material collecting means, mounted to an end of the first and second cooling means, for collecting the cooling material after passing through the first and second cooling means; and cooling material outlet means, disposed at an end of the cooling material collecting means, for allowing the cooling material to flow out of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An alternator/starter oil cooling system for a hybrid electric vehicle having an auxiliary power unit, comprising:
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an alternator/starter of the auxiliary power unit having a rotor and a stator, the rotor being mounted onto a drive shaft of the hybrid electric vehicle, the stator having a winding stack on a core of the stator; a housing containing the alternator/starter; means for conducting heat from inside the alternator/starter, the alternator/starter being cooled at an outside of the alternator/starter, the conducting heat means being disposed at an end of the winding stack of the stator; cooling means for cooling heat on the outside of the alternator/starter, the cooling means being disposed around the conducting heat means and the winding stack of the stator; first seal means, disposed between the housing and the alternator/starter, for sealing the cooling means to prevent a cooling material from leaking into the alternator/starter, cooling contaminations are eliminated inside the alternator/starter; second seal means, disposed around the cooling means, having a wall for sealing the cooling means to prevent the cooling material from leaking into the alternator/starter; cooling material inlet means, mounted on the housing, for allowing the cooling material to flow into the cooling means; cooling material collecting means, mounted to an end of the cooling means, for collecting the cooling material after passing through the cooling means; and cooling material outlet means, disposed at an end of the cooling material collecting means, for allowing the cooling material to flow out of the housing. - View Dependent Claims (17, 18, 19)
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20. A thermal management system for a hybrid electric vehicle having an auxiliary power unit, comprising:
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alternator/starter cooling means for cooling an alternator/starter in the auxiliary power unit; engine lubricating/cooling means for cooling an engine in the auxiliary power unit; cooling material collecting means for collecting a cooling material after passing through the alternator/starter and the engine; means for scavenging the cooling material from the cooling material collecting means to a first heat exchanger so that the cooling material can be recycled for further cooling purposes; means for circulating the cooling material back to the alternator/starter and the engine; and a second heat exchanger being disposed on the circulating means between the first heat exchanger and an alternator/starter inlet. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An alternator/starter oil cooling system for a hybrid electric vehicle, comprising:
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an alternator/starter having a rotor and a stator, the stator having a winding stack on a core of the stator; a housing containing the alternator/starter; means for conducting heat from inside the alternator/starter, the conducting heat means being disposed at an end of the winding stack of the stator; cooling means for cooling heat from inside the alternator/starter, the cooling means having first and second cooling passageways, the first cooling passageway being disposed around the heat conducting means for directly cooling heat from inside of the alternator/starter, the second cooling passageway being disposed around the winding stack of the stator for cooling heat on the winding stack of the stator; cooling material inlet means, mounted on the housing and being in fluid communication with the first and second cooling passageways, for allowing a cooling material to flow into the cooling passageways; cooling material collecting means, mounted to an end of the cooling means, for collecting the cooling material after passing through the cooling means; and cooling material outlet means, disposed at an end of the cooling material collecting means, for allowing the cooling material to flow out of the housing. - View Dependent Claims (27)
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28. A thermal management system for a hybrid electric vehicle having an auxiliary power unit, comprising:
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alternator/starter cooling means for cooling an alternator/starter in the auxiliary power unit; engine lubrication/cooling means for cooling an engine in the auxiliary power unit; cooling material collecting means for collecting a cooling material after passing through the alternator/starter and the engine; means for scavenging the cooling material from the cooling material collecting means to heat exchanger means which is connected to the scavenging means; and means for circulating the cooling material from the heat exchangermeans back to the alternator/starter and the engine. - View Dependent Claims (29)
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Specification