Methods for optimizing the efficiency of a series hybrid vehicle with multi-gear transmission
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Nov 6, 2012
Issued Date -
N/A
app pub date -
Dec 17, 2009
filing date -
Dec 17, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a series hybrid vehicle, a system for determining a shift schedule for shifting a multi-gear transmission connected to a drive means is disclosed. A vehicle operator selects among a plurality of shift styles respectively representing a plurality of shift schedules variously optimized for performance or fuel economy. A performance-based shift schedule favors providing maximum power to the road by starting at the first (lowest) gear when accelerating from a stop and utilizing all available gears of the transmission. An economy based shift schedule favors energy efficiency by skipping the first gear and optionally one or more higher-numbered gears in order to bias operation of the drive means toward lower speeds and higher torque output while reducing shift frequency. The invention provides for maintaining the number of gear ratio choices provided by a transmission having relatively many distinct gear ratios, while providing for reduced frequency of shifting and driver choice of a shift schedule favoring either performance or economy.
First Claim
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Family
- No Family data available.
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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U S ENVIRONMENTAL PROTECTION AGENCY | 1200 PENNSYLVANIA AVENUE NW WASHINGTON DC 20460 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Gray,, Jr Charles L | Pinckney, US | 37 | 401 |
# of filed Patents : 37 Total Citations : 401 |
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Patent Citation Ranking
- 7 Citation Count
- B60W Class
- 0 % this patent is cited more than
- 13 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Apr 12, 1993 | F | Filing | |
Mar 12, 1990 | PD | Priority Date |

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