GB347806A - Improvements in means for adjusting the valve gears of internal combustion engines - Google Patents

Improvements in means for adjusting the valve gears of internal combustion engines

Info

Publication number
GB347806A
GB347806A GB7076/30A GB707630A GB347806A GB 347806 A GB347806 A GB 347806A GB 7076/30 A GB7076/30 A GB 7076/30A GB 707630 A GB707630 A GB 707630A GB 347806 A GB347806 A GB 347806A
Authority
GB
United Kingdom
Prior art keywords
valves
exhaust
shafts
opening
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7076/30A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB347806A publication Critical patent/GB347806A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

347,806. Valve gear; regulating. BOULET, G., 8, Avenue de Bellevue, Sevres, Seine-et-Oise, France. March 4, 1930, No. 7076. Convention date, March 30, 1929. [Class 7 (vi).] A pair of inlet valves C and a corresponding pair of exhaust valves (not shown) are actuated by two cam shafts A, B, which are adjustable angularly in opposite directions so as to vary the periods of admission and exhaust, particularly in aircraft engines. The shafts are adjusted by axial movement of their driving-pinions, which engage helical flutes on the shafts, and the arrangement is such that the periods of opening of the two inlet valves may be made to overlap more or less to vary the total admission period, and the overlap of the opening of the exhaust valves may also be varied to the extent of allowing re-introduction of exhaust gas on the suction stroke when the period of opening of the inlet valves is short. According to the Specification as open to inspection under Sect. 91 (3) (a), there may be a separate shaft to each valve, either with four valves as described above, or with two inlet and one exhaust valve. Also, instead of providing helical flutes on the shafts, the flutes may be rectangular and the gearing teeth helical. This subject-matter does not appear in the Specification as accepted.
GB7076/30A 1929-03-30 1930-03-04 Improvements in means for adjusting the valve gears of internal combustion engines Expired GB347806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR347806X 1929-03-30

Publications (1)

Publication Number Publication Date
GB347806A true GB347806A (en) 1931-05-07

Family

ID=8892572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7076/30A Expired GB347806A (en) 1929-03-30 1930-03-04 Improvements in means for adjusting the valve gears of internal combustion engines

Country Status (1)

Country Link
GB (1) GB347806A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608210A2 (en) * 1986-09-29 1988-06-17 Innolab Rotary timing device with discontinuous rotation using a Maltese cross including means for making the finger of the Maltese cross work
GB2228533A (en) * 1988-12-24 1990-08-29 Ford Motor Co I.c.engine valve gear
WO2007057479A1 (en) * 2005-11-16 2007-05-24 Plasencia Marichal Pedro A Camshaft variator device
ES2352488A1 (en) * 2005-11-16 2011-02-21 A Plasencia Marichal Pedro Camshaft variator device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608210A2 (en) * 1986-09-29 1988-06-17 Innolab Rotary timing device with discontinuous rotation using a Maltese cross including means for making the finger of the Maltese cross work
GB2228533A (en) * 1988-12-24 1990-08-29 Ford Motor Co I.c.engine valve gear
WO2007057479A1 (en) * 2005-11-16 2007-05-24 Plasencia Marichal Pedro A Camshaft variator device
ES2352488A1 (en) * 2005-11-16 2011-02-21 A Plasencia Marichal Pedro Camshaft variator device
US8443774B2 (en) 2005-11-16 2013-05-21 Pedro A. Plasencia Marichal Camshaft variator device

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