GB2278883A - Cam drive reciprocating piston engine. - Google Patents

Cam drive reciprocating piston engine. Download PDF

Info

Publication number
GB2278883A
GB2278883A GB9309372A GB9309372A GB2278883A GB 2278883 A GB2278883 A GB 2278883A GB 9309372 A GB9309372 A GB 9309372A GB 9309372 A GB9309372 A GB 9309372A GB 2278883 A GB2278883 A GB 2278883A
Authority
GB
United Kingdom
Prior art keywords
mainshaft
cam
engine
connecting rod
piston
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.)
Withdrawn
Application number
GB9309372A
Other versions
GB9309372D0 (en
Inventor
Stephen William Owen
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
Priority to GB9309372A priority Critical patent/GB2278883A/en
Publication of GB9309372D0 publication Critical patent/GB9309372D0/en
Publication of GB2278883A publication Critical patent/GB2278883A/en
Withdrawn legal-status Critical Current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
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • F01B2009/061—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces by cams
    • F01B2009/065—Bi-lobe cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • F01B2009/061—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces by cams
    • F01B2009/066—Tri-lobe cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • F01B2009/061—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces by cams
    • F01B2009/068—Quadri-lobe cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups

Landscapes

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

Abstract

The connecting rods are maintained in contact with the grooved cams 1, 2, 3, by crankshaft mechanisms 7, cam mechanisms (11, Figs. 8 to 10) or springs (9, Figs. 6 and 7). Spacers 6 locate the cams on the output shaft 4 and the maintaining mechanisms are driven by gears 8 from the output shaft. <IMAGE>

Description

INTERNAL COMBUSTION CAM ENGINE This invention relates to an internal combustion four stroke engine The internal four stroke combustion engine has remained basically unchanged over the years (other than the design of the rotary Wankel engine), in that it utilises a crankshaft which rotates two complete revolutions to obtain a single power stroke.
This invention allows for multi stoke piston movement for two complete revolutions or less, whilst affording more than one power stroke.
The invention presents a mainshaft upon which is secured a double sided single cam or multi cams separated by spacers as required, connected to by mechanical means various types of piston/connecting rod assembly drive mechanisms: Type (a) The mainshaft is connected to a mini-crankshaft via direct gearing or belt/chain drive. The mini-crankshaft is in turn directly connected to a piston/connecting rod assembly (as a conventional type engine) thus maintaining constant contact with the cam/s.
Type (b) The piston/connecting rod for the purpose of the invention becomes in effect an inverted valve/spring assembly, which by virtue of the constant compression of the spring direct contact with the cam/s is maintained.
This concept removes the rotary movement of the connecting rod.
Type (c) The piston/connecting rod is directly attached to a single cam shaft which opposes the movement of the main cam/s. This can be achieved by either direct gearing or belt/chain drive. To this event constant contact with the main cam/s is achieved. Also the rotary movement of the connecting rod is eliminated.
The basic concept of the invention is henceforth described by way of example, making reference to the accompanying drawings.
Figs 1, 2 and 3 indicate the basic cam shapes fitted to the mainshaft being set at top dead centre (T.D.C) and bottom dead centre (B.D.C).
Figs 4 and 5 shows the concept as described in type (a) above both in section and isometric view.
Figs 6 and 7 shows the concept as described in type (b) above both in section and isometric view.
Figs 8, 9 and 10 shows the concept as described in type (c) above both in sections and isometric view.
The drawings indicated are two and three dimensional which comprise Figs 1, 2 and 3, these show various shaped cams (set at top dead centre (T.D.C) and bottom dead centre (B.D.C)) 1, 2 and 3 fitted to the mainshaft 4, with the piston/connecting root assembly 5 above.
Figs 4 and 5 as described in panel A type (a) indicate a four cylinder engine arrangement. Fig 4 indicates a basic longitudinal section of the mainshaft, highlighting two piston at T.D.C and two at B.D.C. The arrangement shows cams 1 fitted to the mainshaft 4 and spacers 6 with the piston connecting rod assembly 5 connected to the mini-crankshaft 7 being driven by direct gearing, belt or chain drive. 8. Fig 5 indicates how the arrangement fits together in isometric view, cams 1 are shown fitted to the mainshaft 4 with cams 2 and 3 shown how they would substitute cams 1. As the mainshaft is rotated the mini-camshaft is counter rotated, maintaining constant piston/connecting rod-cam contact.
Figs 6 and 7 as described in panel A type (b) indicate a four cylinder engine arrangement. Figure 6 indicates a basic longitudinal section of the mainshaft, highlighting two pistons at T.D.C. and two at B.D.C. The arrangement shows cams 1 fitted to the mainshaft 4 and spacers 6 with the pistion/connecting rod assembly 5, fitted with compression springs 9, restrained by collar plate 10. Fig 7. indicates how the arrangement fits together with in isometric view. Cams 1 are shown fitted to the mainshaft 4 with cams 2 and 3 shown how they would substitute cams 1. As the mainshaft is rotated the springs go through compression/decompression which maintains constant piston/connecting rod-cam contact.
Figs 8, 9 and 10 as described in panel A type (c) indicate a four cylinder engine arrangement. Fig 8 indicates a basic longitudinal section of the mainshaft, highlighting two pistons at T.D.C. and two pistons at B.D.C. The arrangement shows cams 1 fitted to the mainshaft 4 and spacers 6 with the slotted piston/connecting rod assembly 5 fitted to a single camshaft 11, being driven by direct gearing, belt or chain drive 8. Fig 9. indicates a basic cross section through the mainshaft, highlighting mainshaft cam 1, slotted piston/connecting rod assembly 5 and single camshaft 11 at T.D.C. (shape of slot in connecting rod indicated between top and bottom of single camshaft). B.D.C. configuration shown in dotted lines. Fig 10. indicates how the arrangement fits together in isometric view. Cams 1 are shown fitted to the mainshaft 4 with cams 2 and 3 shown how they would substitute cams 1.

Claims (8)

1. An engine comprising a mainshaft upon which is secured a single, double sided cam or multipul cams, seperated with spacers as required connected to by mechanical means various types of piston/connecting rod assembly mechanisms.
2. An engine as claimed in 1 wherein the mainshaft is connected to a mini-crankshaft upon which is fitted the piston/connecting rod assembly, which being driven by mechanical means is rotated, maintaining constant contact with the cam.
3. An engine as claimed in 1 wherein the mainshaft when rotated compresses a spring which is directly connected to the piston/connecting rod assembly. After 'top dead centre' the spring returns to its uncompressed state, thus maintaining constant 'connecting rod to cam' contact.
4. An engine as claimed in 1 wherein the mainshaft is connected to a smaller single cam shaft, which is slotted between the piston/connecting rod assembly, which being driven by mechanical means is rotated maintaining constant contact with the main cam.
5. An engine as described in 1, 2, 3 and 4 fitted with a double cam Fig 1, yields a single power stroke for every revolution of the mainshaft per cylinder.
6. An engine as described in 1, 2, 3 and 4 fitted with a triple cam Fig 2, yields 1F power strokes for every revolution of the mainshaft per cylinder.
7. An engine as described in 1, 2, 3 and 4 fitted with a quad cam Fig 3, yields two power strokes for every revolution of the mainshaft per cylinder.
8. An engine substantially as described herein, with reference to Figs 1-10 of the accompanying drawings.
GB9309372A 1993-05-06 1993-05-06 Cam drive reciprocating piston engine. Withdrawn GB2278883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9309372A GB2278883A (en) 1993-05-06 1993-05-06 Cam drive reciprocating piston engine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9309372A GB2278883A (en) 1993-05-06 1993-05-06 Cam drive reciprocating piston engine.

Publications (2)

Publication Number Publication Date
GB9309372D0 GB9309372D0 (en) 1993-06-16
GB2278883A true GB2278883A (en) 1994-12-14

Family

ID=10735055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9309372A Withdrawn GB2278883A (en) 1993-05-06 1993-05-06 Cam drive reciprocating piston engine.

Country Status (1)

Country Link
GB (1) GB2278883A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732069A1 (en) * 1995-03-20 1996-09-27 Bornert Pierre Converter for linear motion of piston to rotary motion
FR2732071A1 (en) * 1995-03-23 1996-09-27 Const Et D Innovations Sa Atel Connecting rod end bearing in cam-type IC engine
WO2000026505A1 (en) * 1998-11-04 2000-05-11 Split-Cycle Technology Limited Method and means for varying piston-in-cylinder motion
CN103343714A (en) * 2013-08-02 2013-10-09 上海交通大学 Reciprocating piston engine with elliptical cams
US11789264B2 (en) 2021-07-04 2023-10-17 Lumus Ltd. Display with stacked light-guide elements providing different parts of field of view

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB309334A (en) * 1928-05-26 1929-04-11 Adolf Ehrlich Improvements in cam driving gear for internal-combustion and other fluid pressure engines
GB1270983A (en) * 1968-09-12 1972-04-19 Hatz Motoren Two-stroke internal combustion engine
EP0064726A1 (en) * 1981-05-11 1982-11-17 Werner Arendt Internal-combustion engine
GB2126279A (en) * 1982-08-31 1984-03-21 Stanley Edwin Williams Concerting reciprocating to rotary motion in i.c. engines
EP0213230A1 (en) * 1985-08-23 1987-03-11 NAUTSCHNO PROIZVODSTVENA LABORATORIA za DVIGATELI s VATRESCHNO GORENE Modular internal-combustion engine
WO1987007327A1 (en) * 1986-05-22 1987-12-03 Bob Hoogenboom A piston motor with parallel cylinders arranged around the driving shaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB309334A (en) * 1928-05-26 1929-04-11 Adolf Ehrlich Improvements in cam driving gear for internal-combustion and other fluid pressure engines
GB1270983A (en) * 1968-09-12 1972-04-19 Hatz Motoren Two-stroke internal combustion engine
EP0064726A1 (en) * 1981-05-11 1982-11-17 Werner Arendt Internal-combustion engine
GB2126279A (en) * 1982-08-31 1984-03-21 Stanley Edwin Williams Concerting reciprocating to rotary motion in i.c. engines
EP0213230A1 (en) * 1985-08-23 1987-03-11 NAUTSCHNO PROIZVODSTVENA LABORATORIA za DVIGATELI s VATRESCHNO GORENE Modular internal-combustion engine
WO1987007327A1 (en) * 1986-05-22 1987-12-03 Bob Hoogenboom A piston motor with parallel cylinders arranged around the driving shaft

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732069A1 (en) * 1995-03-20 1996-09-27 Bornert Pierre Converter for linear motion of piston to rotary motion
FR2732071A1 (en) * 1995-03-23 1996-09-27 Const Et D Innovations Sa Atel Connecting rod end bearing in cam-type IC engine
WO2000026505A1 (en) * 1998-11-04 2000-05-11 Split-Cycle Technology Limited Method and means for varying piston-in-cylinder motion
CN103343714A (en) * 2013-08-02 2013-10-09 上海交通大学 Reciprocating piston engine with elliptical cams
CN103343714B (en) * 2013-08-02 2015-04-01 上海交通大学 Reciprocating piston engine with elliptical cams
US11789264B2 (en) 2021-07-04 2023-10-17 Lumus Ltd. Display with stacked light-guide elements providing different parts of field of view

Also Published As

Publication number Publication date
GB9309372D0 (en) 1993-06-16

Similar Documents

Publication Publication Date Title
US6453869B1 (en) Internal combustion engine with variable ratio crankshaft assembly
US3312206A (en) Reciprocating engines
CA2157991A1 (en) Crank mechanism system for the transformation of reciprocating linear motion into rotary motion, particularly suitable for reciprocating endothermic engines
US3175544A (en) Internal combustion engines
JP2016522346A (en) 1-stroke internal combustion engine {ONE-STROKE INTERNAL COMBUSTION ENGINE}
GB2278883A (en) Cam drive reciprocating piston engine.
EP1056928B1 (en) Multiple shaft engine
US4128084A (en) Rotary engine
EP0628709B1 (en) Internal combustion engine
US5560324A (en) Oscillating piston internal combustion engine
KR860700278A (en) Drive driven by piston
GB2392475A (en) I.c. engine connecting rod arrangement
US5396868A (en) Two stroke internal combustion engine
SU1751364A1 (en) Eccentric piston-type nonconnecting rod engine
RU2090768C1 (en) Axial mechanism of internal combustion engines for converting reciprocating motion into rotation
CA2074754C (en) Power transmission mechanism
JPH062566A (en) Power transmitting device
RU98107769A (en) PISTON MACHINE
JPS61171952A (en) Mechanism for obtaining rotary motion by reciprocally rotating reciprocating motion
RU2013605C1 (en) Internal combustion engine
US3783840A (en) Cylinder block
SU1196573A1 (en) Link and lever mechanism
SU1657663A1 (en) Piston machine
CA2308129A1 (en) Gas and air engine
RU96122674A (en) INTERNAL COMBUSTION ENGINE

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)