Apparatus and method for controlling variable valve operating mechanism
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 25, 2004
Grant Date -
Oct 3, 2002
app pub date -
Mar 20, 2002
filing date -
Mar 27, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an internal combustion engine equipped with a variable valve operating mechanism that performs a valve timing control and a valve lift amount control of at least one of an intake valve and an exhaust valve, target values of the valve timing and the valve lift amount set based on an engine operating condition are limited by a limit value to limit a control range of one of the valve timing and the valve lift amount in accordance with a control state of the other of the valve timing and the valve lift amount, so that the valve timing and the valve lift amount are controlled based on the respective target values one of which has been limited as above.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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HITACHI LTD | 6-6 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008280 JAPAN |
International Classification(s)

- 2002 Application Filing Year
- F01L Class
- 461 Applications Filed
- 189 Patents Issued To-Date
- 41 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Machida, Kenichi | Atsugi, JP | 129 | 1016 |
# of filed Patents : 129 Total Citations : 1016 |
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Patent Citation Ranking
- 4 Citation Count
- F01L Class
- 2.99 % this patent is cited more than
- 21 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 |
---|---|---|---|
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 |
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