A Dolcera Report production about the variable valve timing (VVT) technology, major players and technological developments. The report focuses on technology, industry and patent landscape of the concerned topic. The Dolcera center of excellence finds about growth of a technology; competition- key players, innovators; gaps and opportunities in the technology and industry with the analyses of patents and trends as the core. This presentation is a brief introduction to the detailed Dolcera Report on VVT. For more details and complete report contact info@dolcera.com

1. Variable Valve Timing
Knowledge Services
Technology in automobiles
Variable Valve Timing 1
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3. Contents
Variable Valve Timing
Introduction
IP search and Analysis for US, IPC , ECLA , DEKLA Classes
Taxonomy - Class based and Technology based taxonomy
Top Cited Patents
Key Findings
• Major Players
• IP Activity
• Geographical Activity
• Major Player Analysis
• Statistical Analysis
• Citation statistics
Technology citation statistics
Assignee citation statistics
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4. Introduction
• Valve timing plays an important role in engine performance. Valves
generally control the amount of charge or intake air into the engine cylinder.
• In conventional engines, valves open or close in the correct amount and for
correct duration at correct time only for a particular speed. Speeds other
than above mentioned speed; timing, duration and lift are not optimized.
• In a valve timing technology equipped engine, valve opening or closing
timing, duration and lift are optimized for either inlet or both inlet and outlet
valves at all engine speeds or according to engine requirements.
• Optimizing valve opening or closing timings in an engine improves engine
breathing thereby improving engine performance and reducing fuel
consumption. Also improves engine torque over wide range of speeds,
reduces pumping losses, and also effects various engine operating
parameters.
• This technology not only does improve engine performance but also
reduces harmful emissions facilitating internal exhaust gas recirculation.
This is a major advantage when the present emission norms are taken into
consideration.
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5. VVT Taxonomy
A detailed
taxonomy is
presented covering
components of
VVT, functionality,
mode of
actuation, applicatio
ns, are among
others
• To see the detailed VVT Taxonomy, mailto: info@dolcera.com
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6. Classification
• Different classes related to variable valve timing are identified
• These classes are used in the search strategy
• To see the detailed classification, mailto: info@dolcera.com
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7. Control Patents
• Highly relevant patents are used for extracting keywords and ensuring the
quality of the search query
Publication Date
S. No. Patent/Publication No. Assignee/Applicant Title
(mm/dd/yyyy)
1 US6278211 08/02/01 Sweo Edwin Brushless doubly-fed induction machines employing dual cage rotors
2 US6954004 10/11/05 Spellman High Voltage Electron Doubly fed induction machine
3 US7411309 08/12/08 Xantrex Technology Control system for doubly fed induction generator
4 US7485980 02/03/09 Hitachi Power converter for doubly-fed power generator system
5 US7800243 09/21/10 Vestas Wind Systems Variable speed wind turbine with doubly-fed induction generator compensated for varying rotor speed
6 US7830127 11/09/10 Wind to Power System Doubly-controlled asynchronous generator
• To see the detailed table, mailto: info@dolcera.com
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8. Search Concepts
• Concepts used to search patent literature
• To see the detailed table, mailto: info@dolcera.com
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9. Keyword Search
Database: MICROPATENT
Timeline: 01/01/1991 to 13/09/2011
Patent Coverage: US EP WO JP DE GB FR
• To see the detailed table, mailto: info@dolcera.com
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10. Taxonomy
• A detailed class based taxonomy is also prepared and is furnished below.
• To see the detailed interactive taxonomy, mailto: info@dolcera.com
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11. Dolcera Dashboard
• Dolcera dashboard is a web 2.0 technology. It enables dynamic
presentation of patent data.
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12. Insights: Major Players
• Toyota, Schaeffler and Hitachi are the amongst the major players in variable
valve timing technology.
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13. Insights: Key Patents
• Key patents in the field are held by General Motors, Nissan and Hitachi.
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14. Insights: Year wise IP activity
Year wise IP activity based on Priority years
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15. Insights: Year wise IP activity
Year wise IP activity based on publication years
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16. Insights: Geographical Distribution
Geographical distribution of patents
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17. Insights: Others
• By taking forward citations of all the patents into account calculated average citation
frequency of patents.
• Similar analysis is done to the patents of top10 classes and top 10 assignees.
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18. Insight: Others
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19. Insight: Others
• The average citation frequency of the patents pertaining to this technology is
found to be 4.123
• Though Toyota has a major share of 13.5% patents to its name as its average
citation frequency is well below average citation frequency.
• From the assignee citations graph it is clear that Ford ,Nissan and Aisin AW
have good quality patents as their average citation frequency is above average
citation frequency of all patents.
• Similarly from technology citation graph classes F01L0001344A1 (changing
valve timing with out altering lift or duration using hydraulic lifters),
F01L000126D (simultaneous multiple valve operation),F01L000904 (electrical
actuation of valves) have good quality patents, as their average citation
frequency is more than the average citation frequency of all relevant patents.
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20. Like this presentation?
This is only a sample report with brief analysis. Purchase the complete
report here. Price: $999
Dolcera can provide a comprehensive report customized to your needs
Buy the customized report from Dolcera
Patent Analytics Services Market Research Services Purchase Patent Dashboard
Patent Landscape Services Dolcera Processes Industry Focus
Patent Search Services Patent Alerting Services Dolcera Tools
Samir Raiyani
Email: info@dolcera.com
Phone: +1-650-425-6772
Fax: +1-866-690-7517
info@dolcera.com Variable Valve Timing 20