WO1990009513A1 - Device for varying the angular relationship between the crankshaft and the camshaft of an internal combustion engine - Google Patents
Device for varying the angular relationship between the crankshaft and the camshaft of an internal combustion engine Download PDFInfo
- Publication number
- WO1990009513A1 WO1990009513A1 PCT/IT1989/000026 IT8900026W WO9009513A1 WO 1990009513 A1 WO1990009513 A1 WO 1990009513A1 IT 8900026 W IT8900026 W IT 8900026W WO 9009513 A1 WO9009513 A1 WO 9009513A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- belt
- camshafts
- crankshaft
- governor
- internal combustion
- Prior art date
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
- F01L1/02—Valve drive
- F01L1/024—Belt drive
-
- 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
- F01L1/348—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 by means acting on timing belts or chains
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
Definitions
- this invention concerns an auto- matic governor, for internal combustion engines, that re ⁇ gulates the stroke between the crankshaft and the camshafts by means of actuators placed to operate on the chain c'on- necting said crank and camshafts.
- crankshafts with pi ⁇ stons sliding in their cylinders, and valves for feeding in the fuel and discharging the products of combustion. 5
- These valves are operated by a camshaft according to a combination of factors defining the instants in which said valves open and close in relation to the position of the crankshaft. This combination of factors is expressed in the word "timing”. 0 " Timing means that precise stage of the operation when the crankshaft and the camshaft are situated in a radial po ⁇ sition, in relation to each other, that will obtain max ⁇ imum performance from the engine.
- Said performance depends on variables, such as: 5 - the sequence of movements causing the suction valve to rise ;
- timing values differ ac ⁇ cording to whether engine running speed is high or low. All the above emphasises the need to have details of timing set in the best possible way and to keep them so set.
- crankshaft and camshaft In present engines mechanical connection between crankshaft and camshaft is usually made by means of a chain or toothed belt and by pinions or gear wheels. Connection between crankshaft and camshaft, or shafts, by chains or belts inevitably involves more or less consid ⁇ erable departure from the above mentioned optimum values due to mechanical tolerances of the various parts, and to wear and warping due to heat, stresses, high speeds and changes of regime.
- the above invention eliminates these drawbacks and further offers important advantages as will be explained below. Description of the invention
- Subject of the invention is a governor, for internal com ⁇ bustion engines, of the stroke between crankshaft and ca - shafts connected by a belt or continuous chain of some kind, that determines, by means of actuators, the variation in length of- sections of chain between the crankshaft and camshafts, or between the latter, without varying the to ⁇ tal length of said chain. It thus becomes possible:
- An automatic tightener acting on a section of chain,keeps constant the tension of said section-, from one moment to the next, adjusting the effect of the actuators on the other sections of chain.
- Each actuator operates on a section of chain through a cam.
- the various positions taken up by said cam obvious ⁇ ly correspond to a longer or shorter length of said section of chain.
- the actuators function by means of an electric motor. Based on data received from appropriate detecting devices an electronic drive unit evaluates, from one moment to the next, the positions of the crankshaft in relation to the camshafts, and puts into operation the actuator motors which then restore, or produce, optimum timing. Similarly, a program is inserted in an electronic drive unit which, using information received from an appropriate de ⁇ tecting device when engine speeds change, can control the actuators to secure optimum timing for each running speed.
- the detectors consist of sensors mounted onto the fixed structure of the engine on the, cir ⁇ cular trajectories followed by signalling devices, such as permanent magnets for example, fixed at a certain ra ⁇ dial point of the crankshaft and camshafts.
- the invented governor can be used both on engines with a single camshaft and on those with two or more camsh.afts, timing of either type of these shafts being possible by mounting an actuator for each one.
- the electronic drive unit When engine speed is altered the electronic drive unit will automatically determine the variations in timing between the crankshaft and one camshaft and the other, or between the crankshaft and a single camshaft, to secure the best timing for the new speed a program for which was previously put into the drive unit's electronic circuits. Engine timing is thus automatically adjusted during move- ment at any speed so as to establish that most effective between crankshaft and camshafts to produce the best per ⁇ formance in power and efficiency.
- FIG. 1 Perspective view of an engine for motor vehicles with two camshafts, showing the invented device.
- Fig. 2 Diagram of the device shown in Fig. 1.
- Fig. 3 Diagram of the invented device mounted in an engine with a single camshaft.
- the engine 10 with four cylinders 11 has one chankshaft 12 and two camshafts 13 and 14, for the valves 18.
- the pinion gear 15, fixed to the crankshaft, is connected to the gear wheels 16, 17, respectively fixed to camshafts 13, 14 by the toothed belt 20.
- An ordinary belt tightener 21 is mounted on a section of belt between gear wheels 16 and 17.
- Said tightener comprises a roller 22 supported freely by a fork 23 translatable in relation to the support 24 fixed to the structure 19 of the engine.
- a spring 25 tends to keep the roller 22 in contact ith the belt 20 ensuring constant belt tension which includes adjusting any variations due to wear on the kinematic con ⁇ nections or to any other cause.
- cams 40, 41, res ⁇ pectively acting on sections 30 and 31 of the chain 20, through their roller bearings 32, 33, are mounted halfway between said pinion gear and said gear wheels.
- Cam 40 is fixed to shaft 42 in the electric actuator 43 while cam 41 is fixed to shaft 44 in the electric actuator 45. Said actuators are fixed to the main structure 19 of the engine 10.
- Figure 2 also shows the electronic dirve unit 50 connected to sensors 51, 52, 53 subjected to action by signalling devices 54, 55, 56 the first two of which are mounted on the gear wheels 16 and 17 fixed to the camshafts, and the third on the pinion gear 15 fixed to the crankshaft.
- the sensors 51, 52, 53 are connected to the drive unit 50 by wires 60, 61, 62.
- the motors of electric actuators 43, 45 are worked by the drive unit 50 to which they are connected by wires 63 and
- the invention can therefore be utilized in various ways to ensure optimum timing at each moment.
- Timing between crankshaft and camshafts having been adjusted, the succession of impulses generated by signalling devices 54, 55, 56, the first two mounted on the camshafts and the third on the crankshaft, will indicate to the drive unit if timing is optimum or not and, in any case if it corresponds to the established setting. If, while the engine is running, timing between camshaft 13,and the gear wheel 16 fixed to it, and crankshaft 12, becomes incorrect for any reason, the electronic drive unit will automatically make cam 40 on actuator 43 rotate so as to extend,or loosen, section 30 of belt 20 until timing between camshaft 13 and crankshaft 12 is restored to optimum value. Alterations in tension of belt 20 due to rotation by the cam are- automatically adjusted by the tightening device 24.
- FIG. 3 diagrammatically presents a device, like that al ⁇ ready described ,mounted on an internal combustion engine 69 with one camshaft 70 only, connected by a gear wheel 71 to a gear wheel 72 fixed to crankshaft 73.
- the tightener 80 acts on section 75 of the toothed belt 74 through the roller 81.
- the cam 78 acts on section 76 of belt 74, said cam being fixed to shaft 79 through the electric actuator 77 connect ⁇ ed by wire 90 to the electronic drive unit 98, to which are also connected sensors 91, 92 respectively situated on the trajectories of signalling devices 93, 94 fixed respectively to the two gear wheels 71 and 72.
- the sensors 91 and 92 are connected to the electronic drive unit by their respective wires 96 and 97.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE68927264T DE68927264T2 (en) | 1989-02-10 | 1989-04-14 | DEVICE FOR ADJUSTING THE RELATIVE ROTATION ANGLE BETWEEN THE CRANKSHAFT AND THE CAMSHAFT OF AN INTERNAL COMBUSTION ENGINE |
EP89904854A EP0457757B1 (en) | 1989-02-10 | 1989-04-14 | Device for varying the angular relationship between the crankshaft and the camshaft of an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT19396A/89 | 1989-02-10 | ||
IT8919396A IT1228657B (en) | 1989-02-10 | 1989-02-10 | AUTOMATIC PHASE REGULATOR BETWEEN THE CRANKSHAFT AND THE DISTRIBUTION CAMSHAFTS BY ACTUATORS ACTING ON THE CONNECTION CHAIN. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990009513A1 true WO1990009513A1 (en) | 1990-08-23 |
Family
ID=11157336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1989/000026 WO1990009513A1 (en) | 1989-02-10 | 1989-04-14 | Device for varying the angular relationship between the crankshaft and the camshaft of an internal combustion engine |
Country Status (7)
Country | Link |
---|---|
US (1) | US5144920A (en) |
EP (1) | EP0457757B1 (en) |
JP (1) | JPH04504451A (en) |
AU (1) | AU3443889A (en) |
DE (1) | DE68927264T2 (en) |
IT (1) | IT1228657B (en) |
WO (1) | WO1990009513A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2665560C1 (en) * | 2017-05-31 | 2018-08-31 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Елецкий государственный университет им. И.А. Бунина" | Ice gas distribution mechanism drive |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5209202A (en) * | 1992-07-27 | 1993-05-11 | Ford Motor Company | Multiple functions cam sensing |
US5245968A (en) * | 1992-08-04 | 1993-09-21 | Ford Motor Company | System to determine cam phase and cylinder identification for a variable cam timing engine |
JP3696261B2 (en) * | 1993-11-29 | 2005-09-14 | 株式会社デンソー | Valve timing control device having cylinder discrimination function |
JP2000154731A (en) * | 1998-11-18 | 2000-06-06 | Yamaha Motor Co Ltd | Power transmission device for four-cycle engine |
US6155218A (en) * | 1999-03-22 | 2000-12-05 | The United States Of America As Represented By The Secretary Of The Army | Cam advancing and retarding mechanism |
DE19954481A1 (en) | 1999-11-12 | 2001-05-23 | Porsche Ag | Chain guide for a control shaft drive of an internal combustion engine and method for producing a chain guide |
KR20030017870A (en) * | 2001-08-23 | 2003-03-04 | 현대자동차주식회사 | variable exhaust valve timing control apparatus |
FR2850755B1 (en) * | 2003-01-31 | 2005-05-13 | Renault Sa | METHOD FOR DETERMINING THE WEAR CONDITION OF A DISTRIBUTION CHAIN |
US7214153B2 (en) * | 2003-07-18 | 2007-05-08 | Borgwarner Inc. | Method of changing the duty cycle frequency of a PWM solenoid on a CAM phaser to increase compliance in a timing drive |
DE102004041232B4 (en) * | 2004-08-26 | 2017-07-13 | Schaeffler Technologies AG & Co. KG | Method for operating a camshaft adjuster |
DE102008029457A1 (en) * | 2008-06-20 | 2009-12-24 | J. Engelsmann Ag | Bulk goods mixing device, has electromotors synchronized with each other by traction drive e.g. gear belt, for producing synchronization, where traction drive couples drive shafts of electromotors |
US7984644B2 (en) * | 2009-04-15 | 2011-07-26 | GM Global Technology Operations LLC | Camshaft position measurement and diagnosis |
RU2539251C2 (en) * | 2013-02-28 | 2015-01-20 | Павел Игнатьевич Загуменнов | Metal heat-exchange surface and two-stroke ice with metal heat exchange surface (versions) |
CN104279283B (en) * | 2014-09-30 | 2016-11-30 | 陈丹红 | A kind of optical relay manufactures the drive adjusting device of equipment |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE832527C (en) * | 1950-06-10 | 1952-02-25 | Daimler Benz Ag | Device for adjusting the angle of two shafts to one another |
DE3029858A1 (en) * | 1979-08-08 | 1981-02-19 | Denzel Kraftfahrzeug Wolfgang | Adjustable timing chain of IC engine - has stepless adjustment using friction drive between chain wheel and camshaft |
US4723516A (en) * | 1985-11-25 | 1988-02-09 | Slagley Michael W | Valve open duration and timing controller |
WO1988006677A1 (en) * | 1987-02-24 | 1988-09-07 | Allied-Signal Inc. | Variable camshaft timing system |
Family Cites Families (15)
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US3496918A (en) * | 1968-04-23 | 1970-02-24 | Madison H Finlay | Variable valve timing control for internal combustion engines |
US3888217A (en) * | 1973-09-24 | 1975-06-10 | Charles A Hisserich | Camshaft belt drive for variable valve timing |
US4484543A (en) * | 1979-06-20 | 1984-11-27 | Maxey Joel W | Adjustable non-throttling control apparatus for spark ignition internal combustion engines |
DE2926327A1 (en) * | 1979-06-29 | 1981-01-29 | Volkswagenwerk Ag | Hydraulic valve gear for IC engine - has adjustable rotary valve controlling oil flow to vary inlet valve timing |
US4368705A (en) * | 1981-03-03 | 1983-01-18 | Caterpillar Tractor Co. | Engine control system |
DE3210914A1 (en) * | 1982-03-25 | 1983-09-29 | Atlas Fahrzeugtechnik GmbH, 5980 Werdohl | Camshaft control device |
JPS5963338A (en) * | 1982-10-04 | 1984-04-11 | Toyota Motor Corp | Method of controlling change-over of valve timing of internal-combustion engine of variable valve timing type |
JPS59103910A (en) * | 1982-12-06 | 1984-06-15 | Toyota Motor Corp | Exhaust gas purifier for internal-combustion engine |
DE3506106A1 (en) * | 1984-02-22 | 1985-08-22 | Audi AG, 8070 Ingolstadt | Method for controlling the power output of an exhaust turbocharger supplying a valve-timed internal combustion engine |
DE3509094A1 (en) * | 1984-04-06 | 1985-10-17 | Volkswagenwerk Ag, 3180 Wolfsburg | Device for the infinitely variable adjustment of the valve timings of exhaust and refill valves |
JPS61259672A (en) * | 1985-05-13 | 1986-11-17 | マイエル・ホスピタルテクニ−ク・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Apparatus and methdo for performing washing, sterilization and drying |
JP2610121B2 (en) * | 1985-05-14 | 1997-05-14 | ヤマハ発動機株式会社 | Valve timing control device for internal combustion engine |
JPS63140807A (en) * | 1986-12-04 | 1988-06-13 | Yamaha Motor Co Ltd | Valve opening timing adjuster for engine |
US4872426A (en) * | 1987-02-24 | 1989-10-10 | Siemens-Bendix Automotive Electronics L.P. | Variable camshaft timing system |
US4862845A (en) * | 1988-05-10 | 1989-09-05 | Borg-Warner Transmission And Engine Components Corporation | Variable camshaft timing system |
-
1989
- 1989-02-10 IT IT8919396A patent/IT1228657B/en active
- 1989-04-14 DE DE68927264T patent/DE68927264T2/en not_active Expired - Fee Related
- 1989-04-14 JP JP1504582A patent/JPH04504451A/en active Pending
- 1989-04-14 WO PCT/IT1989/000026 patent/WO1990009513A1/en active IP Right Grant
- 1989-04-14 AU AU34438/89A patent/AU3443889A/en not_active Abandoned
- 1989-04-14 EP EP89904854A patent/EP0457757B1/en not_active Expired - Lifetime
- 1989-04-14 US US07/720,813 patent/US5144920A/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE832527C (en) * | 1950-06-10 | 1952-02-25 | Daimler Benz Ag | Device for adjusting the angle of two shafts to one another |
DE3029858A1 (en) * | 1979-08-08 | 1981-02-19 | Denzel Kraftfahrzeug Wolfgang | Adjustable timing chain of IC engine - has stepless adjustment using friction drive between chain wheel and camshaft |
US4723516A (en) * | 1985-11-25 | 1988-02-09 | Slagley Michael W | Valve open duration and timing controller |
WO1988006677A1 (en) * | 1987-02-24 | 1988-09-07 | Allied-Signal Inc. | Variable camshaft timing system |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN, Vol. 12, No. 392 (M-755)(3239), 19 October 1988; & JP-A-63140807 (Yamaha Motor Co. Ltd) 13 June 1988 * |
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 96 (M-294)(1533), 4 May 1984; & JP-A-5912108 (Toyota Jidosha Kogyo K.K.) 21 January 1984 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2665560C1 (en) * | 2017-05-31 | 2018-08-31 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Елецкий государственный университет им. И.А. Бунина" | Ice gas distribution mechanism drive |
Also Published As
Publication number | Publication date |
---|---|
DE68927264T2 (en) | 1997-04-17 |
US5144920A (en) | 1992-09-08 |
EP0457757A1 (en) | 1991-11-27 |
IT1228657B (en) | 1991-06-27 |
JPH04504451A (en) | 1992-08-06 |
IT8919396A0 (en) | 1989-02-10 |
EP0457757B1 (en) | 1996-09-25 |
DE68927264D1 (en) | 1996-10-31 |
AU3443889A (en) | 1990-09-05 |
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