Hybrid vehicle control operation
First Claim
1. A drive system for a hybrid vehicle comprising:
- a differential including a planetary gear set having a plurality of rotating elements and at least one engagement element, wherein at least one rotating element of the plurality of rotating elements is connected to each of, a first motor generator of the hybrid vehicle, an engine of the hybrid vehicle, a drive wheel of the hybrid vehicle and a second motor generator of the hybrid vehicle, wherein the at least one engagement element selectively provides a variable speed ratio mode and a fixed speed ratio mode for the differential, wherein the first motor generator generates electric power from output power of at least one of the engine and the second motor generator in the variable speed ratio mode; and
a controller that selects the variable speed ratio mode to charge a battery of the hybrid vehicle when a state of charge of the battery is lower than a predetermined value.
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Abstract
A drive system for a hybrid vehicle comprises a differential including a planetary gear set having a plurality of rotating elements and at least one engagement element. At least one rotating element is connected to each of, a first motor generator, an engine, a drive wheel and a second motor generator. The at least one engagement element selectively provides a variable speed ratio mode and a fixed speed ratio mode for the differential. The first motor generator generates electric power from output power of at least one of the engine and the second motor generator in the variable speed ratio mode. The drive system further includes a controller that selects the variable speed ratio mode to charge a battery of the hybrid vehicle when a state of charge of the battery is lower than a predetermined value.
60 Citations
23 Claims
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1. A drive system for a hybrid vehicle comprising:
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a differential including a planetary gear set having a plurality of rotating elements and at least one engagement element, wherein at least one rotating element of the plurality of rotating elements is connected to each of, a first motor generator of the hybrid vehicle, an engine of the hybrid vehicle, a drive wheel of the hybrid vehicle and a second motor generator of the hybrid vehicle, wherein the at least one engagement element selectively provides a variable speed ratio mode and a fixed speed ratio mode for the differential, wherein the first motor generator generates electric power from output power of at least one of the engine and the second motor generator in the variable speed ratio mode; and
a controller that selects the variable speed ratio mode to charge a battery of the hybrid vehicle when a state of charge of the battery is lower than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A drive system for a hybrid vehicle comprising:
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a differential including a planetary gear set having a plurality of rotating elements and at least one engagement element, wherein at least one rotating element of the plurality of rotating elements is connected to each of, a first motor generator of the hybrid vehicle, an engine of the hybrid vehicle, a drive wheel of the hybrid vehicle and a second motor generator of the hybrid vehicle, wherein the at least one of engagement element selectively restricts rotation of the first motor generator, wherein the differential selectively provides a variable speed ratio mode and a fixed speed ratio mode in response to a vehicle driving condition of a hybrid vehicle, and wherein the first motor generator generates electric power in the variable speed ratio mode, wherein the at least one of engagement element restricts rotation of the first motor generator in the fixed speed ratio mode;
a battery that is electrically connected to the first and second motor generators; and
a controller that selects the variable speed ratio mode when a state of charge of the battery is lower than a predetermined value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification