EP0345366A1 - Achttakt- oder Diesel-Brennkraftmaschine - Google Patents

Achttakt- oder Diesel-Brennkraftmaschine Download PDF

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Publication number
EP0345366A1
EP0345366A1 EP88109096A EP88109096A EP0345366A1 EP 0345366 A1 EP0345366 A1 EP 0345366A1 EP 88109096 A EP88109096 A EP 88109096A EP 88109096 A EP88109096 A EP 88109096A EP 0345366 A1 EP0345366 A1 EP 0345366A1
Authority
EP
European Patent Office
Prior art keywords
axis
engine
internal combustion
compression ratio
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Withdrawn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
EP88109096A
Other languages
English (en)
French (fr)
Inventor
Alfredo Buffoli
Renzo Buffoli
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 EP88109096A priority Critical patent/EP0345366A1/de
Publication of EP0345366A1 publication Critical patent/EP0345366A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • 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
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/047—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of variable crankshaft position
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B75/021—Engines characterised by their cycles, e.g. six-stroke having six or more strokes per cycle

Definitions

  • the present invention relates to an eight cycle or Diesel type internal combustion carburation engine.
  • the present invention relates to an eight cycle or Diesel type internal combustion carburation engine having the important and original feature increase the compression ratio at each engine revolution, each time one of the pistons reaches top dead point or center.
  • This graph illustrates the relationship between the engine's compression ratio (Rc) and thermal efficiency (Ni), shown respectively on the horizontal and vertical axes.
  • the compression ratio varies from 0 to 20, while the thermal efficiency varies between 0 and 7.
  • the curve representing the engine's thermal efficiency as a function of the compression ratio, can be compared to a hyperbolic branch. It, therefore, follows that the thermal efficiency (Ni) increases rapidly at the beginning of the curve, i.e. for relatively low compression ratios, while higher pressures, such as Rc's from 10 to 20, cause the Ni to grow in smaller increments.
  • the object of the present invention is to provide an internal combustion engine which works on the principle described above, i.e., the automatic variation of the compression ratio.
  • the eight cycle Diesel type internal combustion engine as claimed allows to obtain the above object.
  • the intake valve (10) is shown on the cylinder head (3) above the piston (12) (see Figure 1), while the exhaust valve (11) is shown in figure 3 which is a side view of the engine.
  • the intake (10) and exhaust (11) valves are driven by a cam shaft (7) which is carried by known supports (8), inside of which it rotates.
  • Reference E of figure 1 illustrates the distance between the B axis and the A axis.
  • the upper 30 and lower 41 supports of the crankshaft (29) are fixed to and supported by the A axis.
  • Such supports (30) and (41) are firmly assembled and connected by clamping screws (49) as shown in figure 1; the left screw is longer than the right one.
  • the main feature of the present invention is the staggered position of the A axis of the supports (30) and (41) in relation to the B axis.
  • the engine of the present invention is, moreover, equipped with an original mechanism which allows the automatic movement of the top of the piston (12) in order to achieve a desired variation in the compression ratio (Rc).
  • FIG. 2 shows that an appropriately shaped plate (16), part of which is toothed (16a) is connected to the supports (30) and (41) of the crankshaft (29).
  • the clutch casing (20) is mounted on this plate (16) provided a toothed sector (16a) and rotates around the A axis, while the B axis is its own central axis.
  • the clutch (20) and plate (16) rotate eccentrically.
  • the clutch casing (20) rotation around the A axis is provided by a gear (55) (see figure 2) driven by a direct current motor (56), through a undirectional reducer (69).
  • the engine of the present invention has a fixed casing (15) which houses the above mentioned elements as well as three proximity microswitches (17), (18) and (19). These microswitches work in conjunction with three position detectors (58), (59) and (60), mounted on the clutch casing (20) and caused to cooperate with the microswitches (17), (18) and (19). Insofar as the casing (15) is stationary and the clutch casing (20) is rotating, it is possible to vary the positioning between the three microswitches and the three detectors.
  • a minimum compression ratio value exists, being maximum the distance X between the top of the piston 12 and the bottom of the cylinder head (see fig. 5).
  • a medium compression ratio value is achieved when microswitch (18) is aligned with position detector (59).
  • the maximum compression ratio value is achieved by aligning microswitch (19) with position detector (60); in fact in this position the distance y between the top of the piston (12) and the bottom of the cylinder head is smallest (see fig. 6).
  • a suitable computer situated on the board of the motor vehicle determines the appropriate and selected compression ratio values (Rc) on the basis of the following factors: number of engine revolutions; position of the throttle which regulates fuel intake measured by a suitable device (9), and finally, the temperature of the air taken in.
  • Rc compression ratio values
  • Figure 4 shows the timing system of the engine of the present invention.
  • the engine of the present invention has an additional axis in which a gear (70) with a pulley (71) is located.
  • Gear (36) through a chain, provides movement to a gear (70); both of these are in the same horizontal axis whenever a medium compression ratio exists.
  • FIG. 3 illustrates a complete 4-cylinder engine according to the present invention.
  • the basic elements of the invention, and other known elements, which are not to be considered innovations, are illustrated.
  • Reference 1 indicates the engine block to which the front cover is fixed in the conventional manner.
  • Reference 3 indicates the cylinder head, and reference 4 identifies the chain stretching gear.
  • Reference 21 marks the engine flywheel, and the clutch is identified by reference 22.
  • the clutch control lever is indicated by reference 23, while reference 24 marks the clutch pressure spring bearing.
  • the gearbox is indicated by 28, and 35 identifies the pump which sends oil through a flexible pipe numbered 37; the oil pan is indicated by 32.
  • the starting motor and related gear shown in figure 2 are indicated by references 63 and 62, respectively.
  • the present engine allows the programmed/programable variation of the compression ratio, without varying the amount of fuel mixture consumed, in order to achieve the optimal engine efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP88109096A 1988-06-08 1988-06-08 Achttakt- oder Diesel-Brennkraftmaschine Withdrawn EP0345366A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP88109096A EP0345366A1 (de) 1988-06-08 1988-06-08 Achttakt- oder Diesel-Brennkraftmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88109096A EP0345366A1 (de) 1988-06-08 1988-06-08 Achttakt- oder Diesel-Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP0345366A1 true EP0345366A1 (de) 1989-12-13

Family

ID=8199036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109096A Withdrawn EP0345366A1 (de) 1988-06-08 1988-06-08 Achttakt- oder Diesel-Brennkraftmaschine

Country Status (1)

Country Link
EP (1) EP0345366A1 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669676A1 (fr) * 1990-11-23 1992-05-29 Jurkovic Dimitri Paliers permettant de faire varier le taux de compression d'un moteur a combustion interne.
EP0560701A1 (de) * 1992-03-13 1993-09-15 MATESIC, Alex Verbrennungskraftmaschine mit einem veränderlichen Verdichtungsverhältnis und einer regelbaren drehenden Masse des Schwungrades
NL1005395C2 (nl) * 1997-02-06 1998-08-07 Leon Ruben Van De Werve Verbrandingsmotor met variabele compressieverhouding.
WO1999061766A1 (en) * 1998-05-29 1999-12-02 Edward Charles Mendler Rigid crankshaft cradle and actuator
US6260532B1 (en) 1998-09-28 2001-07-17 Edward Charles Mendler Rigid crankshaft cradle and actuator
US6443107B1 (en) 1999-05-27 2002-09-03 Edward Charles Mendler Rigid crankshaft cradle and actuator
EP1245803A1 (de) * 2001-03-30 2002-10-02 Gomecsys B.V. Brennkraftmaschine mit variablem Verdichtungsverhältnis
US6637384B1 (en) 1999-11-12 2003-10-28 Edward Charles Mendler Rigid crankshaft cradle and actuator
AT414017B (de) * 2004-07-08 2006-08-15 Avl List Gmbh Brennkraftmaschine
CN101749114A (zh) * 2008-11-28 2010-06-23 现代自动车株式会社 用于车辆发动机的可变压缩率装置
DE102009043505A1 (de) 2009-09-30 2011-03-31 Fev Motorentechnik Gmbh Verbrennungskraftmaschine mit variabler Verdichtung
US8714134B2 (en) 2008-02-13 2014-05-06 Gomecys B.V. Reciprocating piston mechanism and a method of increasing internal EGR in an internal combustion engine
US20140360292A1 (en) 2012-01-24 2014-12-11 Joannes Jacobus Josephus SLEPER Reciprocating piston mechanism
US9279363B2 (en) 2009-07-15 2016-03-08 Gomecsys B.V. Reciprocating piston mechanism
US10145299B2 (en) 2014-04-08 2018-12-04 Gomecsys B.V. Internal combustion engine including variable compression ratio
US10233966B2 (en) 2013-11-13 2019-03-19 Gomecsys B.V. Method of assembling and an assembly of a crankshaft and a crank member
US10557409B2 (en) 2015-10-22 2020-02-11 Gomecsys B.V. Heat engine comprising a system for varying the compression ratio

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR692084A (fr) * 1929-06-03 1930-10-30 Moteur à compression variable
FR913622A (fr) * 1945-03-20 1946-09-16 Moteur Et Accessoires Aviat Mi Perfectionnement aux moteurs à auto-allumage
DE3004402A1 (de) * 1980-02-07 1981-08-13 Daimler-Benz Ag, 7000 Stuttgart Kurbeltrieb einer hubkolben-brennkraftmaschine mit waehrend des betriebes veraenderbarem kompressionsverhaeltnis
US4738230A (en) * 1986-03-13 1988-04-19 Johnson Kenneth A Variable compression ratio control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR692084A (fr) * 1929-06-03 1930-10-30 Moteur à compression variable
FR913622A (fr) * 1945-03-20 1946-09-16 Moteur Et Accessoires Aviat Mi Perfectionnement aux moteurs à auto-allumage
DE3004402A1 (de) * 1980-02-07 1981-08-13 Daimler-Benz Ag, 7000 Stuttgart Kurbeltrieb einer hubkolben-brennkraftmaschine mit waehrend des betriebes veraenderbarem kompressionsverhaeltnis
US4738230A (en) * 1986-03-13 1988-04-19 Johnson Kenneth A Variable compression ratio control

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669676A1 (fr) * 1990-11-23 1992-05-29 Jurkovic Dimitri Paliers permettant de faire varier le taux de compression d'un moteur a combustion interne.
EP0560701A1 (de) * 1992-03-13 1993-09-15 MATESIC, Alex Verbrennungskraftmaschine mit einem veränderlichen Verdichtungsverhältnis und einer regelbaren drehenden Masse des Schwungrades
NL1005395C2 (nl) * 1997-02-06 1998-08-07 Leon Ruben Van De Werve Verbrandingsmotor met variabele compressieverhouding.
WO1999061766A1 (en) * 1998-05-29 1999-12-02 Edward Charles Mendler Rigid crankshaft cradle and actuator
US6260532B1 (en) 1998-09-28 2001-07-17 Edward Charles Mendler Rigid crankshaft cradle and actuator
US6443107B1 (en) 1999-05-27 2002-09-03 Edward Charles Mendler Rigid crankshaft cradle and actuator
US6637384B1 (en) 1999-11-12 2003-10-28 Edward Charles Mendler Rigid crankshaft cradle and actuator
EP1228298A4 (de) * 1999-11-12 2004-03-24 Edward Charles Mendler Steifer kurbelwellenhalter und betätigungsvorrichtung
EP1245803A1 (de) * 2001-03-30 2002-10-02 Gomecsys B.V. Brennkraftmaschine mit variablem Verdichtungsverhältnis
WO2002079626A1 (en) * 2001-03-30 2002-10-10 Gomecsys B.V. Internal combustion engine with variable compression ratio
AT414017B (de) * 2004-07-08 2006-08-15 Avl List Gmbh Brennkraftmaschine
US8714134B2 (en) 2008-02-13 2014-05-06 Gomecys B.V. Reciprocating piston mechanism and a method of increasing internal EGR in an internal combustion engine
CN101749114A (zh) * 2008-11-28 2010-06-23 现代自动车株式会社 用于车辆发动机的可变压缩率装置
US9279363B2 (en) 2009-07-15 2016-03-08 Gomecsys B.V. Reciprocating piston mechanism
DE102009043505A1 (de) 2009-09-30 2011-03-31 Fev Motorentechnik Gmbh Verbrennungskraftmaschine mit variabler Verdichtung
US20140360292A1 (en) 2012-01-24 2014-12-11 Joannes Jacobus Josephus SLEPER Reciprocating piston mechanism
US10234006B2 (en) 2012-01-24 2019-03-19 Gomecsys B.V. Reciprocating piston mechanism
US10233966B2 (en) 2013-11-13 2019-03-19 Gomecsys B.V. Method of assembling and an assembly of a crankshaft and a crank member
US10145299B2 (en) 2014-04-08 2018-12-04 Gomecsys B.V. Internal combustion engine including variable compression ratio
US10557409B2 (en) 2015-10-22 2020-02-11 Gomecsys B.V. Heat engine comprising a system for varying the compression ratio

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