[특허]Rotary engine expansion chamber apparatus and method of operation therefor

Pekrul, Merton W.

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특허 상세정보

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Rotary engine expansion chamber apparatus and method of operation therefor

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01C-021/00 F01C-001/00
미국특허분류(USC)	418/075; 418/259
출원번호	US-0014167 (2011-01-26)
등록번호	US-8523547 (2013-09-03)
발명자 / 주소	Pekrul, Merton W.
출원인 / 주소	Pekrul, Merton W.
대리인 / 주소	Hazen, Kevin
인용정보	피인용 횟수 : 58 인용 특허 : 113

초록
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An engine is described for operation on a fuel expanding about adiabatically in a power stroke of the engine. To aid the power stroke efficiency, the rotary engine contains one or more of a rotor configured to rotate in a stator, the rotor offset along both an x-axis and a y-axis relative to a center of the stator, a vane configured to span a distance between the rotor and the stator, where the inner wall of the stator further comprises at least one of: a first cut-out in the housing at the initiation of the power stroke, use of a build-up in the housing at the end of the power stroke, and/or use of a second cut-out in the housing at the completion of rotation of the rotor in the engine. The engine yields a cross-sectional area expanding during a portion of the power stroke at about the Fibonacci ratio.

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1. An apparatus, comprising: a rotary engine, comprising: a rotor configured to rotate in a stator, said stator comprising about a first primarily elliptical inner wall,said rotor offset along both an x-axis and a y-axis relative to a center of said inner wall of said stator, wherein said x-axis and said y-axis form an x/y plane perpendicular to a rotatable shaft extending through said rotor;a vane configured to span a distance between said rotor and said stator, said vane comprising a vane tip configured to proximately maintain contact with said inner wall as a function of rotation of said rotor, said vane configured to extend and retract as a function of rotation of said rotor, wherein a twelve o'clock position comprises a point of rotation of said rotor of first extension of said vane,wherein said inner wall of said stator further comprises: a first cutout, said vane configured to extend into said first cutout;a second cutout, said vane configure to extend into said second cutout; anda build-up. 2. The apparatus of claim 1, wherein said rotary engine comprises: an expander engine. 3. The apparatus of claim 1, wherein said first cut-out comprises: a first cutout variation of said inner wall within a one o'clock to three o'clock position, said first cutout variation configured to allow extension of said vane tip to a first extension distance exceeding a first original vane extension distance to said first primarily elliptical inner wall at about a two o'clock position. 4. The apparatus of claim 3, wherein said build-up comprises: a build-up variation of said inner wall within a five o'clock to seven o'clock position, said build-up variation configured to allow extension of said vane tip to a maximum build-up extension distance less than a non-build-up vane extension distance to said first primarily elliptical inner wall at about a six o'clock position. 5. The apparatus of claim 4, further comprising: a first cross-sectional area of an expansion chamber between said rotor and said stator, said first cross-sectional area on a first plane co-planar with said vane when said vane is positioned at said two o'clock position; anda second cross-sectional area between said rotor and said stator, said second cross-sectional area on a second plane co-planar with said vane when said vane is positioned at said five o'clock position,said second cross-sectional area about 1.5 to 1.7 times said first cross-sectional area. 6. The apparatus of claim 3, wherein said second cut-out comprises: a second cutout variation of said inner wall within a ten o'clock to twelve o'clock position, said second cutout variation configured to allow extension of said vane tip to a second extension distance exceeding a second original vane extension distance to said first primarily elliptical inner wall at about an eleven o'clock position. 7. The apparatus of claim 6, further comprising: a curved wing-tip extending from said vane tip. 8. The apparatus of claim 7, said curved wing-tip comprising: an outer vane wing-tip surface comprising an increasing distance between said outer vane wing-tip surface and an inner wall of said housing with increasing rotational distance from a central point of said vane tip. 9. The apparatus of claim 8, said curved wing tip comprising: an inner vane wing-tip surface further from said housing relative to said outer vane wing-tip surface proximate said housing, said inner vane wing-tip surface comprising a decreasing distance to said inner wall of said housing with increasing rotational distance from said central point of said vane tip. 10. The apparatus of claim 6, further comprising: a leading vane element extending from said vane tip proximate said stator into a leading chamber, said leading vane element comprising a five or more sided polygon perimeter in an x-, y-cross-sectional plane of said vane. 11. The apparatus of claim 4, wherein said second cut-out comprises: a second cutout variation of said inner wall within a ten o'clock to twelve o'clock position, said second cutout variation configured to allow extension of said vane tip to a second extension distance exceeding a second original vane extension distance to said first primarily elliptical inner wall at about an eleven o'clock position. 12. The apparatus of claim 1, wherein said build-up comprises: a build-up variation of said inner wall within a five o'clock to seven o'clock position, said build-up variation configured to allow extension of said vane tip to a build-up extension distance less than a non-build-up vane extension distance to said first primarily elliptical inner wall at about a six o'clock position. 13. The apparatus of claim 12, further comprising: said second cutout variation of said inner wall within a ten o'clock to twelve o'clock position, said second cutout variation configured to allow extension of said vane tip to a second extension distance exceeding a second original vane extension distance to said first primarily elliptical inner wall at about an eleven o'clock position. 14. The apparatus of claim 13, further comprising: a curved wing-tip extending from said vane tip into a rotationally trailing expansion chamber between said rotor and said stator. 15. The apparatus of claim 1, wherein a tracking orbit of said vane tip comprises a non-elliptical path in said x/y plane. 16. A method, comprising the steps of: rotating a rotor in a stator of a rotary engine, said stator comprising about a first primarily elliptical inner wall, said rotor offset along both an x-axis and a y-axis relative to a center of said inner wall of said stator, wherein said x-axis and said y-axis form an x/y plane perpendicular to a rotatable shaft extending through said rotor;spanning a distance between said rotor and said stator with a vane, said vane comprising a vane tip configured to proximately maintain contact with said inner wall as a function of rotation of said rotor; andextending and retracting said vane as a function of rotation of said rotor, wherein a twelve o'clock position comprises a point of rotation of said rotor of first extension of said vane,wherein said step of extending and retracting comprises at least one of: extending said vane into a first cutout; andextending said vane into a second cutout. 17. The method of claim 16, further comprising the step of: converting a liquid fuel to a gaseous state prior to injection of the fuel between said rotor and said stator. 18. The method of claim 16, further comprising the step of: moving said vane tip along an about elliptical path, said about elliptical path varying sequentially from said about elliptical path at all of: said first cutout;a build-up; andsaid second cutout. 19. The method of claim 18, further comprising the steps of: extending said vane tip to a first extension distance exceeding a first original vane extension distance to said about elliptical path at about a two o'clock position, said first cutout of said inner wall within a one o'clock to three o'clock position;extending said vane tip to a second extension distance less than a non-build-up vane extension distance to said about elliptical path at about a six o'clock position, said build-up of said inner wall within a five o'clock to seven o'clock position; andextending said vane tip to a second extension distance exceeding a second original vane extension distance to said about elliptical path at about an eleven o'clock position, said second cutout of said inner wall within a ten o'clock to twelve o'clock position. 20. The method of claim 19, further comprising the step of: extending a curved wing-tip extending from said vane tip into said second cut-out.

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Rotary engine expansion chamber apparatus and method of operation therefor

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Rotary engine expansion chamber apparatus and method of operation therefor

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