Hybrid electric vehicle engine start technique
First Claim
Patent Images
1. A vehicular hybrid powertrain system, comprising:
- a first prime mover having an output;
a second prime mover having an output;
a synchronizing clutch selectively coupling said first prime mover output and said second prime mover output;
a multi-ratio transmission having an input; and
a planetary gear set operatively coupling said second prime mover output to said first prime mover output or said multi-ratio transmission input based on a coupling state of said synchronizing clutch.
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Abstract
A hybrid powertrain system includes a first prime mover having an output, a second prime mover having an output, a synchronizing clutch selectively coupling the first prime mover output and the second prime mover output, a multi-ratio transmission having an input, and a planetary gear set selectively coupling the second prime mover output to the first prime mover output or the multi-ratio transmission input based on a coupling state of the synchronizing clutch.
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Citations
27 Claims
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1. A vehicular hybrid powertrain system, comprising:
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a first prime mover having an output;
a second prime mover having an output;
a synchronizing clutch selectively coupling said first prime mover output and said second prime mover output;
a multi-ratio transmission having an input; and
a planetary gear set operatively coupling said second prime mover output to said first prime mover output or said multi-ratio transmission input based on a coupling state of said synchronizing clutch. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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3. The vehicular hybrid powertrain system of claim 3, wherein said synchronizing clutch is configured to couple said first prime mover output and said second prime mover output until a rotational velocity of said first prime mover output substantially matches a rotational velocity of said multi-ratio transmission input.
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13. A vehicular hybrid powertrain system, comprising:
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a first prime mover having an output;
a second prime mover having an output;
a synchronizing clutch selectively coupling said first prime mover output and said second prime mover output;
a multi-ratio transmission having an input;
a planetary gear set operatively coupling said second prime mover output to said first prime mover output or said multi-ratio transmission input based on a coupling state of said synchronizing clutch said planetary gear set including a sun gear coupled to said second prime mover output, a planet gear moveably coupled to said sun gear, wherein said planet gear is operatively coupled to said multi-ratio transmission input, and a ring gear configured to house said planet gear, wherein said ring gear is formed on said first prime mover output;
wherein said planetary gear set is configured to drive a rotation of said first prime mover output to start said first prime mover, and operate said first prime mover and said second prime mover in parallel to drive said multi-ratio transmission input. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method of operating a vehicular hybrid powertrain system, comprising:
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providing a first prime mover having an output, a second prime mover having an output, a synchronizing clutch selectively coupling said first prime mover output and said second prime mover output, a multi-ratio transmission having an input, and a planetary gear set operatively coupling said second prime mover output to said first prime mover output or to said multi-ratio transmission input based on a coupling state of said synchronizing clutch;
rotating said second prime mover output to drive rotation of said multi-ratio transmission input;
engaging said synchronizing clutch to couple said second prime mover output and said first prime mover output while decoupling said second prime mover output from said multi-ratio transmission input;
cranking said first prime mover with said second prime mover output. - View Dependent Claims (21, 22, 23, 24)
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25. A vehicular hybrid powertrain system, comprising:
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a first prime mover having an output;
a second prime mover having an output;
a synchronizing clutch selectively coupling said first prime mover output and said second prime mover output;
a multi-ratio transmission having an input; and
a planetary gear set operatively coupling said second prime mover output to said first prime mover output or said multi-ratio transmission input based on a coupling state of said synchronizing clutch;
wherein said vehicular hybrid powertrain system is configured to rotate said second prime mover output to drive rotation of said multi-ratio transmission input, engage said synchronizing clutch to couple said second prime mover output and said first prime mover output while decoupling said second prime mover output from said multi-ratio transmission input, and crank said first prime mover with said second prime mover output. - View Dependent Claims (26, 27)
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Specification