Engine start control device of hybrid vehicle
First Claim
Patent Images
1. An engine start control device of a hybrid vehicle, comprising:
- a differential mechanism that includes first to third rotating elements with which a rotating shaft of a first electric rotating machine, an output shaft of an engine, and a rotating shaft of a second electric rotating machine are coupled, respectively, a fourth rotating element having a center axis of rotation common to the first to third rotating elements, and rolling members which have a center axis of rotation different from the center axis of rotation as well as can transmit power via contact portions between the first rotating element, the third rotating element, and the fourth rotating element and are held by the second rotating element and by which differential rotating operations between the first to third rotating elements are controlled using an alignment chart on which rotation speeds of the first to third rotating elements are disposed in the sequence of the first rotating element, the second rotating element, and the third rotating element and shown by straight lines and in which a rotation speed axis of the second rotating element internally divides between a rotation speed axis of the first rotating element and a rotation speed axis of the third rotating element by a relation of 1;
ρ
, whereinthe differential mechanism changes an internally divided ratio of 1;
ρ
by changing a planetary gear ratio ρ
which is obtained by dividing an absolute value of a relative rotation speed of the third rotating element to the second rotating element on the alignment chart by an absolute value of a relative rotation speed of the first rotating element to the second rotating element by changing a tilt angle of the rolling members, andwhen the engine is cranked at the time the engine starts by transmitting a rotation of the first electric rotating machine to the output shaft of the engine, the planetary gear ratio ρ
is controlled on the alignment chart so that a rotation speed of the first rotating element is increased.
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Abstract
In an engine start control device of a hybrid vehicle including a power dividing mechanism which has a sun roller, a carrier, and a first disc with which a rotating shaft of a first motor/generator, an output shaft of an engine, and an output shaft of a second motor/generator are coupled, respectively and by which differential rotating operations between the sun roller, the carrier, and the first disc are controlled using an alignment chart on which rotation speeds of the sun roller, the carrier, and the first disc are disposed in the sequence of the sun roller, the carrier, the first disc and shown by straight lines.
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Citations
20 Claims
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1. An engine start control device of a hybrid vehicle, comprising:
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a differential mechanism that includes first to third rotating elements with which a rotating shaft of a first electric rotating machine, an output shaft of an engine, and a rotating shaft of a second electric rotating machine are coupled, respectively, a fourth rotating element having a center axis of rotation common to the first to third rotating elements, and rolling members which have a center axis of rotation different from the center axis of rotation as well as can transmit power via contact portions between the first rotating element, the third rotating element, and the fourth rotating element and are held by the second rotating element and by which differential rotating operations between the first to third rotating elements are controlled using an alignment chart on which rotation speeds of the first to third rotating elements are disposed in the sequence of the first rotating element, the second rotating element, and the third rotating element and shown by straight lines and in which a rotation speed axis of the second rotating element internally divides between a rotation speed axis of the first rotating element and a rotation speed axis of the third rotating element by a relation of 1;
ρ
, whereinthe differential mechanism changes an internally divided ratio of 1;
ρ
by changing a planetary gear ratio ρ
which is obtained by dividing an absolute value of a relative rotation speed of the third rotating element to the second rotating element on the alignment chart by an absolute value of a relative rotation speed of the first rotating element to the second rotating element by changing a tilt angle of the rolling members, andwhen the engine is cranked at the time the engine starts by transmitting a rotation of the first electric rotating machine to the output shaft of the engine, the planetary gear ratio ρ
is controlled on the alignment chart so that a rotation speed of the first rotating element is increased. - View Dependent Claims (2, 3, 7, 8, 9, 10, 11, 14, 17, 20)
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4. An engine start control device of a hybrid vehicle, comprising:
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a differential mechanism that includes first to fourth rotating elements with which a rotating shaft of a first electric rotating machine, an output shaft of an engine, an output shaft toward a drive wheel side, and a rotating shaft of a second electric rotating machine are coupled, respectively and rolling members which have a center axis of rotation different from a common center axis of rotation in the first to fourth rotating elements, can transmit power via contact portions between the first rotating element, the third rotating element, and the fourth rotating element, and held by the second rotating element and by which differential rotating operations between the first to fourth rotating elements are controlled using an alignment chart on which rotation speeds of the first to fourth rotating elements are disposed in the sequence of the first rotating element, the second rotating element, the third rotating element, and the fourth rotating element and shown by straight lines and in which a rotation speed axis of the second rotating element internally divides between a rotation speed axis of the first rotating element and a rotation speed axis of the third rotating element by a relation of 1;
ρ
1 and a rotation speed axis of the second rotating element internally divides between the rotation speed axis of the first rotating element and a rotation speed axis of the fourth rotating element by a relation of 1;
ρ
2, whereinthe differential mechanism changes internally divided ratios of 1;
ρ
1 and 1;
ρ
2 by changing a first planetary gear ratio ρ
1 which is obtained by dividing an absolute value of a relative rotation speed of the third rotating element to the second rotating element by an absolute value of a relative rotation of the first rotating element to the second rotating element and a second planetary gear ratio ρ
2 which is obtained by dividing an absolute value of a relative rotation speed of the fourth rotating element to the second rotating element by an absolute value of a relative rotation of the first rotating element to the second rotating element on the alignment chart by changing a tilt angle of the rolling members, andwhen the engine is cranked at the time the engine starts by transmitting a rotation of the first electric rotating machine to the output shaft of the engine, the first and second planetary gear ratios ρ
1, ρ
2 are controlled on the alignment chart so that a rotation speed of the first rotating element is increased. - View Dependent Claims (5, 6, 12, 13, 15, 16, 18, 19)
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Specification