EP2325444A1 - Hydraulische nockenwelle und hydraulisches steuersystem dafür - Google Patents

Hydraulische nockenwelle und hydraulisches steuersystem dafür Download PDF

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Publication number
EP2325444A1
EP2325444A1 EP09806362A EP09806362A EP2325444A1 EP 2325444 A1 EP2325444 A1 EP 2325444A1 EP 09806362 A EP09806362 A EP 09806362A EP 09806362 A EP09806362 A EP 09806362A EP 2325444 A1 EP2325444 A1 EP 2325444A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
camshaft
cylinder
oil
solenoid 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.)
Withdrawn
Application number
EP09806362A
Other languages
English (en)
French (fr)
Other versions
EP2325444A4 (de
Inventor
Jianjun Wang
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.)
Chery Automobile Co Ltd
Original Assignee
Chery Automobile Co Ltd
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 Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Publication of EP2325444A1 publication Critical patent/EP2325444A1/de
Publication of EP2325444A4 publication Critical patent/EP2325444A4/de
Withdrawn legal-status Critical Current

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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
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations

Definitions

  • the present invention relates to a hydraulic camshaft and its control system, in particular, it relates to a hydraulic electromagnetic camshaft for automobile engines.
  • hydraulic systems are widely employed in these solutions. Although compared with electromagnetic control, hydraulic system involves less design complexity, it requires longer execution time. Therefore, the conventional hydraulic system only remains preferable choice for engines where no very quick instantaneous response is required.
  • one technical object of the present invention is to provide a hydraulic camshaft and its control system, which feature simple structure and quick response.
  • another technical object of the present invention is to provide a hydraulic camshaft and its control system, which enables the variation of the gas valve lift so as to improve engine performance accordingly
  • This invention provides a hydraulic camshaft comprising a front-end of camshaft and a camshaft body, wherein an integrated hydraulic assembly is provided between the front end of the camshaft and the camshaft body; said hydraulic assembly enables the hydraulic camshaft move along its axial direction.
  • Said integrated hydraulic assembly is capable of causing the hydraulic camshaft move 10mm along the axial direction.
  • Said hydraulic camshaft also comprises driving cams and a signal cam, and the driving cams are composed of two different kinds of cams, and they are selected corresponding to the axial position of the camshaft.
  • Said integrated hydraulic assembly comprises an oil hole, a guide groove and an oil chamber, the oil hole communicating with the external oil channel and leading through to the oil chamber.
  • the oil pressure in the oil chamber determines the axial position of the camshaft; the guide groove is connected with the camshaft, and it limits the axial movement of the camshaft.
  • Said integrated hydraulic assembly of the present invention is also provided with an ECU and a solenoid valve, which control the oil pressure in the oil chamber jointly.
  • a hydraulic electromagnetic camshaft comprising a front-end of camshaft, a camshaft body, a solenoid valve and an ECU, wherein an integrated hydraulic assembly is set between the front-end of camshaft and the camshaft body and enables the hydraulic camshaft move along its axial direction.
  • Said integrated hydraulic assembly includes an oil hole, a guide groove and an oil chamber, wherein the oil hole communicates with an external oil channel and leads through to the oil chamber, the oil pressure in the oil chamber determines the axial position of the camshaft; the guide groove is connected with the camshaft and limits the axial movement of the camshaft, and the ECU and the solenoid valve jointly control the oil pressure in the oil chamber.
  • the hydraulic control system of the above recited hydraulic camshaft comprises a solenoid valve and an ECU, which operates jointly to control the hydraulic pressure in the integrated hydraulic assembly.
  • each cylinder of the engine is provided with a cylinder hydraulic unit.
  • first cylinder, the second cylinder, the third cylinder and the fourth cylinder are respectively provided with a first cylinder hydraulic unit, a second cylinder hydraulic unit, a third cylinder hydraulic unit and a fourth cylinder hydraulic unit.
  • the hydraulic control system also comprises a sensor, which detects and transfers the detected signal to the ECU.
  • the ECU issues signals to the solenoid valve, based on which the solenoid valve control the oil pressures of the oil channels in the four hydraulic units corresponding to the four cylinders respectively.
  • Said sensor is a cam phase sensor, which detects the phases of the signal cam.
  • the operation status of the hydraulic units of each two neighboring cylinders is opposite to each other, that is, when the first cylinder hydraulic unit and the third cylinder hydraulic unit are switched on; the second cylinder hydraulic unit and the fourth cylinder hydraulic unit are switched off. Such status shift occurs when the cam of each cylinder rotates to the base circle position in orders.
  • the present invention primarily has the following characteristics:
  • the cam shift in each cylinder is implemented sequentially based on the hydraulic system recited above so that the cam shift control is optimized and a quick engine response is thus realized.
  • the present invention enables that the cam shift may only occur in some selective cylinders according to specific operation requirements for the engine. That is, the technical solution provided in the present invention applies for engines that involve selective cylinder deactivation.
  • the present invention Compared with prior art, the present invention has the following advantages:
  • the present invention features simple and practical structure; the gas intake valve lift may be alternated between two levels so that engine performance, fuel efficiency and emission reduction are improved. More specifically: due to the variable gas intake valve lift, the engine performance is remarkably improved, and exhaust emission and fuel consumption of the engine according to present invention is obviously lower than other engines having the same displacement;
  • the present invention features simple and compact structure, which is desirable, for it involves very slight volume change of the whole engine; On the basis that each cylinder is independently controlled, control modes are flexible and diversified. The torque output of the engine running at low speed is improved.
  • FIG 1 is the sectional view of the hydraulic camshaft of the present invention
  • FIG 2 is the sectional view of the hydraulic assembly unit in switched-off status
  • FIG 3 is the sectional view of the hydraulic unit in switched-on status
  • FIG 4 is the schematic diagram of the overall hydraulic system of present invention.
  • the hydraulic camshaft and its control system provided by the present invention mainly includes a hydraulic electromagnetic camshaft, a solenoid valve 13, a cam phase sensor 15 and an ECU 14.
  • ECU 14 When the engine runs in high and intermediate load, ECU 14 respectively issues four groups of shift signals to the solenoid valve 13 corresponding to the signals of the cam phase sensor 15.
  • the solenoid valve 13 then changes the oil pressure of the oil channels in the four hydraulic units on the camshaft.
  • the status of the hydraulic units of every two neighboring cylinders is opposite to each other, that is to say, when the first cylinder hydraulic unit 9 and the third cylinder hydraulic unit 11 are switched on, the second cylinder hydraulic unit 10 and the fourth cylinder hydraulic unit 12 are switched off; such on-off shift occurs when the cam of each cylinder rotates to the base circle position in orders.
  • the whole cycle of such a shift is described as follows:
  • the oil pressure in the first cylinder hydraulic unit 9 reduces; simultaneously the oil pressure in the second cylinder hydraulic unit 10 increases, so that the cam shift of the first cylinder is completed;
  • the oil pressure in the third cylinder hydraulic unit 11 reduces; simultaneously the oil pressure in the fourth cylinder hydraulic unit 12 increases, so that the cam shift of the third cylinder is completed;
  • oil in the external channel enters the oil chamber 8 via oil hole 6, and the axial movement of the camshaft is guided and limited by the guide groove 7.
  • the present invention also provides a hydraulic electromagnetic camshaft, including a front-end of camshaft 1, a camshaft body 4, a solenoid valve 13 and an ECU 14, wherein an integrated hydraulic assembly 2 is set between the front-end of camshaft 1 and the camshaft body 4, and such integrated hydraulic assembly enables the hydraulic camshaft move along its axial direction.
  • the integrated hydraulic assembly 2 comprises an oil hole 6, a guide groove 7 and an oil chamber 8, the oil hole 6 communicates with the external oil channel and leads through to the oil chamber 8, the oil pressure in the oil chamber 8 determines the axial position of the camshaft, and the guide groove 7 is connected with the camshaft and limits the axial movement of the camshaft.
  • the ECU 14 and the solenoid valve 13 jointly control the oil pressure in the oil chamber 8.
  • the hydraulic control system of the hydraulic camshaft comprises a cam phase sensor 15, a solenoid valve 13 and an ECU 14, wherein the solenoid valve 13 and the ECU 14 jointly control the hydraulic pressure in the integrated hydraulic assembly 2.
  • Each cylinder of the engine is provided with an independent hydraulic unit, that is to say, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are respectively provided with a first cylinder hydraulic unit 9, a second cylinder hydraulic unit 10, a third cylinder hydraulic unit 11 and fourth cylinder hydraulic unit 12.
  • a cam phase sensor 15 detects the phase signal and transfers the detected signals to the ECU 14, and the ECU 14 issues four groups of cam shift signals to the solenoid valve 13, and the solenoid valve 13 controls the oil pressure of the oil channels in the four hydraulic units corresponding to the four cylinders respectively.
  • the operation status of the hydraulic units in each two neighboring cylinders is opposite to each other, that is to say, when the first cylinder hydraulic unit 9 and the third cylinder hydraulic unit 11 are switched on, the second cylinder hydraulic unit 10 and the fourth cylinder hydraulic unit 12 are switched off. Such status shift occurs when the cam of each cylinder rotates to the base circle position in orders.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP09806362A 2008-08-13 2009-08-11 Hydraulische nockenwelle und hydraulisches steuersystem dafür Withdrawn EP2325444A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810021774 2008-08-13
PCT/CN2009/073182 WO2010017759A1 (zh) 2008-08-13 2009-08-11 液压凸轮轴及其液压控制系统

Publications (2)

Publication Number Publication Date
EP2325444A1 true EP2325444A1 (de) 2011-05-25
EP2325444A4 EP2325444A4 (de) 2012-01-11

Family

ID=41668700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09806362A Withdrawn EP2325444A4 (de) 2008-08-13 2009-08-11 Hydraulische nockenwelle und hydraulisches steuersystem dafür

Country Status (2)

Country Link
EP (1) EP2325444A4 (de)
WO (1) WO2010017759A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103806970A (zh) * 2014-03-03 2014-05-21 浙江师范大学 一种带配油定时的凸轮轴

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB127613A (en) * 1917-04-30 1919-06-12 Harry Ralph Ricardo Improvements in Regulating the Speed and Power of Internal Combustion Engines.
US1863875A (en) * 1929-08-31 1932-06-21 Rabezzana Hector Internal combustion engine
US2980089A (en) * 1959-08-26 1961-04-18 Thompson Ramo Wooldridge Inc Valve operating means and control
DE19959125A1 (de) * 1998-12-09 2000-06-21 Denso Corp Variable Ventilsteuervorrichtung
EP1079078A2 (de) * 1999-08-24 2001-02-28 Toyota Jidosha Kabushiki Kaisha Hubventilverstellvorrichtung in einer Brennkraftmaschine und Verfahren zur Änderung einer Hubventil-Öffnung-Schliesscharakteristik
WO2001071167A1 (en) * 2000-03-21 2001-09-27 Walters Christopher Paulet Mel Valve control mechanism
DE102007010154A1 (de) * 2007-03-02 2008-06-26 Audi Ag Ventiltrieb einer Brennkraftmaschine mit dreistufigen Nockenprofilgruppen und verschiebbaren Nockenträgern mit integrierten Stellorganen
DE102007002802A1 (de) * 2007-01-18 2008-07-24 Audi Ag Verfahren zum Umstellen eines Ventiltriebs einer Brennkraftmaschine zwischen einem Zweitakt- und einem Viertaktbetrieb und Ventiltrieb

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10020119A1 (de) * 2000-04-22 2001-10-25 Schaeffler Waelzlager Ohg Vorrichtung zur unabhängigen hydraulischen Verstellung der Phasen- und Axiallage einer Nockenwelle
CN2581698Y (zh) * 2002-10-12 2003-10-22 王晓东 发动机液压配气装置
DE10346443A1 (de) * 2003-10-07 2005-05-04 Daimler Chrysler Ag Hydraulischer Nockenwellenversteller für eine Brennkraftmaschine
CN1289796C (zh) * 2003-10-13 2006-12-13 方戟 内燃式发动机的液压配气机构
DE102004002290B4 (de) * 2004-01-16 2015-05-21 Audi Ag Ventiltrieb einer Brennkraftmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB127613A (en) * 1917-04-30 1919-06-12 Harry Ralph Ricardo Improvements in Regulating the Speed and Power of Internal Combustion Engines.
US1863875A (en) * 1929-08-31 1932-06-21 Rabezzana Hector Internal combustion engine
US2980089A (en) * 1959-08-26 1961-04-18 Thompson Ramo Wooldridge Inc Valve operating means and control
DE19959125A1 (de) * 1998-12-09 2000-06-21 Denso Corp Variable Ventilsteuervorrichtung
EP1079078A2 (de) * 1999-08-24 2001-02-28 Toyota Jidosha Kabushiki Kaisha Hubventilverstellvorrichtung in einer Brennkraftmaschine und Verfahren zur Änderung einer Hubventil-Öffnung-Schliesscharakteristik
WO2001071167A1 (en) * 2000-03-21 2001-09-27 Walters Christopher Paulet Mel Valve control mechanism
DE102007002802A1 (de) * 2007-01-18 2008-07-24 Audi Ag Verfahren zum Umstellen eines Ventiltriebs einer Brennkraftmaschine zwischen einem Zweitakt- und einem Viertaktbetrieb und Ventiltrieb
DE102007010154A1 (de) * 2007-03-02 2008-06-26 Audi Ag Ventiltrieb einer Brennkraftmaschine mit dreistufigen Nockenprofilgruppen und verschiebbaren Nockenträgern mit integrierten Stellorganen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010017759A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103806970A (zh) * 2014-03-03 2014-05-21 浙江师范大学 一种带配油定时的凸轮轴
CN103806970B (zh) * 2014-03-03 2016-05-18 浙江师范大学 一种带配油定时的凸轮轴

Also Published As

Publication number Publication date
WO2010017759A1 (zh) 2010-02-18
EP2325444A4 (de) 2012-01-11

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