WO2010017759A1 - Arbre à cames hydraulique et son système de commande hydraulique - Google Patents

Arbre à cames hydraulique et son système de commande hydraulique Download PDF

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Publication number
WO2010017759A1
WO2010017759A1 PCT/CN2009/073182 CN2009073182W WO2010017759A1 WO 2010017759 A1 WO2010017759 A1 WO 2010017759A1 CN 2009073182 W CN2009073182 W CN 2009073182W WO 2010017759 A1 WO2010017759 A1 WO 2010017759A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
camshaft
cylinder
hydraulic control
oil
Prior art date
Application number
PCT/CN2009/073182
Other languages
English (en)
Chinese (zh)
Inventor
***
Original Assignee
奇瑞汽车股份有限公司
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 奇瑞汽车股份有限公司 filed Critical 奇瑞汽车股份有限公司
Priority to EP09806362A priority Critical patent/EP2325444A4/fr
Publication of WO2010017759A1 publication Critical patent/WO2010017759A1/fr

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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 hydraulic control system, and more particularly to a hydraulic electromagnetic camshaft of an automobile engine. Background technique
  • Two-stage hydraulic tappets or rocker arms can be selected. The most representative one is Schaeffler. Companies such as Eaton and Delphi can also choose two types of drive cams, such as: Hyundai i-vtec.
  • the hydraulic system is generally used for the control of these components. Compared with electromagnetic control, the hydraulic system is less difficult to design, but the execution time is longer, and the engine is not required for the instantaneous degree. Said that hydraulic control system is still the first choice. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a hydraulic camshaft and a hydraulic control system thereof in view of the deficiencies of the prior art, which has a simple structure and can achieve a fast response.
  • Another technical problem to be solved by the present invention is to provide a hydraulic camshaft and a hydraulic control system thereof for the deficiencies of the prior art, which can change the valve lift and improve the engine performance.
  • a hydraulic camshaft includes a camshaft front end and a camshaft body, and a hydraulic control assembly is disposed between the camshaft front end and the camshaft body to move the hydraulic camshaft in the axial direction.
  • the hydraulic control assembly can move the hydraulic camshaft 10 mm in the axial direction.
  • the drive cam consists of two types of cams that can be selected based on the axial position of the camshaft.
  • the hydraulic control assembly includes an oil hole, a guiding groove and an oil chamber.
  • the oil hole is connected to the external oil passage and leads to the oil chamber.
  • the oil pressure in the oil chamber determines the axial position of the cam shaft, and the guiding groove connects the cam shaft and limits the cam. Axial movement of the shaft.
  • It also includes an ECU and a solenoid valve that collectively control the oil pressure in the oil chamber.
  • a hydraulic electromagnetic camshaft includes a camshaft front end, a camshaft body, a solenoid valve and an electronic control unit ECU, and a hydraulic control assembly is disposed between the camshaft front end and the camshaft body, which moves the hydraulic camshaft along the axial direction ,
  • the hydraulic control assembly includes an oil hole, a guiding groove and an oil chamber.
  • the oil hole is connected to the external oil passage and leads to the oil chamber.
  • the oil pressure in the oil chamber determines the axial position of the cam shaft, and the guiding groove connects the cam shaft and limits the cam shaft.
  • the axial movement, the ECU and the solenoid valve jointly control the oil pressure in the oil chamber.
  • the hydraulic control system of the hydraulic camshaft includes a solenoid valve and an electronic control unit ECU, and the solenoid valve and the electronic control unit ECU jointly control the hydraulic pressure in the hydraulic control assembly.
  • Each cylinder of the engine in which the hydraulic camshaft is located is provided with an independent hydraulic control system.
  • the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are respectively provided with a first cylinder hydraulic pressure control, a second cylinder hydraulic pressure control, a third cylinder hydraulic pressure control, and a fourth cylinder hydraulic pressure control.
  • the utility model further comprises a sensor, which senses and transmits a signal to the electronic control unit ECU, and the electronic control unit ECU transmits the group switching signal to the electromagnetic valve, and the electromagnetic valve respectively controls the oil connected to the hydraulic circuit of the first to fourth cylinder hydraulic control on the camshaft according to the signal. Pressure.
  • the sensor is a cam phase sensor that senses the signal of the signal wheel.
  • the state of the hydraulic control part of the adjacent two cylinders is reversed, that is, when the first cylinder hydraulic control and the third cylinder hydraulic control are turned on, the second cylinder hydraulic control and the fourth cylinder hydraulic control cylinder are closed, and the switches are switched to the respective cylinders in sequence.
  • the base circle position is switched.
  • the present invention mainly has the following features:
  • the driving cam of the camshaft is composed of two kinds of cams, and the driving cam can be selected according to the axial position of the camshaft;
  • the independent hydraulic control system of each cylinder can make the engine select the most suitable switching time when switching, which improves the stability during engine switching.
  • the invention completes the cam switching of each cylinder in turn by hydraulic control, optimizes the control system to the maximum, and provides a feasible solution for the instantaneous response of the engine.
  • the lift of individual cylinders can be changed only in accordance with the needs of the engine operating conditions. This technology can be applied to a cylinder-stopped engine.
  • the beneficial effects of the invention are as follows: the structure is simple and practical; the valve lift is Two-stage; can improve engine performance, fuel economy, and reduce emissions; specific advantages are: variable valve lift, engine performance is significantly improved; emissions, fuel consumption is significantly lower than the same displacement engine; simple and compact structure, The design is reasonable, the overall volume of the engine does not change significantly; each cylinder is controlled separately, and the control mode is flexible; the torque output of the engine at low speed is enhanced.
  • Figure 1 is a partial cross-sectional view showing a hydraulic control portion of the present invention
  • Figure 2 is a cross-sectional view showing the hydraulic control closed state of the present invention
  • Figure 3 is a cross-sectional view showing the hydraulic control open state of the present invention.
  • Figure 4 is a schematic diagram of the system of the present invention.
  • FIG. 1 is a partial cross-sectional view of a hydraulic control portion of the present invention
  • FIG. 2 is a cross-sectional view showing a hydraulic control closed state of the present invention
  • FIG. 3 is a cross-sectional view showing a hydraulic control open state of the present invention
  • the hydraulic control system provided by the present invention is mainly composed of a hydraulic electromagnetic camshaft, a solenoid valve 13, a camshaft phase sensor 15, and an ECU 14.
  • the ECU 14 transmits four sets of switching signals to the solenoid valve 13 according to the cam phase sensor 15, respectively, and the solenoid valve 13 changes the oil pressure of the oil lines connecting the four hydraulic control sections on the camshaft according to the signal.
  • the state of the hydraulic control part of the adjacent two cylinders is reversed, that is, when the first cylinder hydraulic pressure control 9 and the third cylinder hydraulic pressure control 11 are open, the second cylinder hydraulic pressure control 10 and the fourth cylinder hydraulic pressure control 12 are closed, switching For each cylinder to switch in the base circle position in turn, the entire switching procedure is as follows:
  • the first cylinder hydraulic control 9 is decompressed, and the second cylinder hydraulic control 10 is supercharged to complete the first cylinder cam switching; the second cylinder hydraulic control 10 is decompressed to complete the second cylinder cam switching;
  • the third cylinder hydraulic control 11 is depressurized, and the fourth cylinder hydraulic control 12 is supercharged to complete the third cylinder cam switching; the fourth cylinder hydraulic control 12 is decompressed to complete the fourth cylinder cam switching.
  • the oil of the external oil passage enters and exits the oil chamber 8 from the oil hole 6, and the axial movement of the cam shaft is restricted and connected by the guide groove 7.
  • the present invention also provides a hydraulic electromagnetic camshaft, comprising: a camshaft front end 1, a camshaft body 4, a solenoid valve 13 and an electronic control unit ECU 14, and a hydraulic control assembly 2 is disposed on the cam. Between the front end 1 of the shaft and the camshaft body 4, the hydraulic cam shaft is moved in the axial direction.
  • the hydraulic control assembly 2 includes an oil hole 6, a guiding groove 7 and an oil chamber 8, and the oil hole 6 is connected to the external oil passage.
  • the oil pressure in the oil chamber 8 determines the axial position of the cam shaft
  • the guide groove 7 connects the cam shaft and limits the axial movement of the cam shaft
  • 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 includes a cam phase sensor 15, a solenoid valve 13 and an electronic control unit ECU 14.
  • the solenoid valve 13 and the electronic control unit ECU 14 jointly control the hydraulic pressure in the hydraulic control assembly 2, where the hydraulic camshaft is located
  • Each cylinder of the engine is provided with an independent hydraulic control system, namely: the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are respectively provided with a first cylinder hydraulic control 9, a second cylinder hydraulic control 10, a third cylinder
  • the hydraulic control 11, the fourth cylinder hydraulic control 12, the camshaft phase sensor 15 senses and transmits a signal to the electronic control unit ECU 14, and the electronic control unit ECU 14 transmits four sets of switching signals to the electromagnetic valve 13, and the electromagnetic valve 13 controls the connecting cam according to the signal.
  • the on-shaft first cylinder hydraulic control 9 to the fourth cylinder are hydraulically controlled to the oil pressure of the 12 medium oil passage.
  • the state of the hydraulic control part of the adjacent two cylinders is reversed, that is: when the first cylinder hydraulic pressure control 9 and the third cylinder hydraulic pressure control 11 are open, the second cylinder hydraulic pressure control 10 and the fourth cylinder hydraulic pressure control 12 cylinder are closed, switching The cylinders are sequentially switched at the base circle position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Un arbre à cames hydraulique et son système de commande hydraulique comprennent une unité de commande électronique (ECU) (14) et une soupape électromagnétique (13). L’ECU transfère respectivement quatre signaux de modification à la soupape électromagnétique (13) sur la base d’un signal de capteur de phase (15) d’arbre à cames quand le moteur tourne à charge élevée et à charge intermédiaire. La soupape électromagnétique (13) modifie respectivement la pression d’huile des canaux reliés aux quatre organes de commande hydraulique disposés sur l’arbre à cames sur la base du signal. Le statut des organes de commande hydraulique de deux cylindres avoisinants est inversé. Ceci induit une modification ordonnée de la position de chaque cylindre sur le cercle de base. La structure et l’application de l’invention sont simples. La course de la soupape comprend deux segments. Le rendement et l’efficacité économique du moteur sont améliorés, et les émissions sont réduites.
PCT/CN2009/073182 2008-08-13 2009-08-11 Arbre à cames hydraulique et son système de commande hydraulique WO2010017759A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09806362A EP2325444A4 (fr) 2008-08-13 2009-08-11 Arbre à cames hydraulique et son système de commande hydraulique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810021774 2008-08-13
CN200810021774.7 2008-08-13

Publications (1)

Publication Number Publication Date
WO2010017759A1 true WO2010017759A1 (fr) 2010-02-18

Family

ID=41668700

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/073182 WO2010017759A1 (fr) 2008-08-13 2009-08-11 Arbre à cames hydraulique et son système de commande hydraulique

Country Status (2)

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EP (1) EP2325444A4 (fr)
WO (1) WO2010017759A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481401B1 (en) * 2000-04-22 2002-11-19 Ina Walzlager Schaeffler Ohg Device for independent hydraulic actuation of the phase and axial position of a camshaft
CN2581698Y (zh) * 2002-10-12 2003-10-22 王晓东 发动机液压配气装置
CN1529041A (zh) * 2003-10-13 2004-09-15 发动机旋转阀液压配气机构
US20050066924A1 (en) * 2003-09-30 2005-03-31 Kai Lehmann Hydraulic camshaft adjuster for an internal combustion engine
DE102004002290A1 (de) * 2004-01-16 2005-08-04 Audi Ag Ventiltrieb einer Brennkraftmaschine

Family Cites Families (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
JP2000170514A (ja) * 1998-12-09 2000-06-20 Denso Corp 可変弁制御装置
JP2001065371A (ja) * 1999-08-24 2001-03-13 Toyota Motor Corp 内燃機関の可変動弁装置
GB0006875D0 (en) * 2000-03-21 2000-05-10 Walters Christopher P M Valve control mechanism
DE102007002802B4 (de) * 2007-01-18 2009-04-09 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481401B1 (en) * 2000-04-22 2002-11-19 Ina Walzlager Schaeffler Ohg Device for independent hydraulic actuation of the phase and axial position of a camshaft
CN2581698Y (zh) * 2002-10-12 2003-10-22 王晓东 发动机液压配气装置
US20050066924A1 (en) * 2003-09-30 2005-03-31 Kai Lehmann Hydraulic camshaft adjuster for an internal combustion engine
CN1529041A (zh) * 2003-10-13 2004-09-15 发动机旋转阀液压配气机构
DE102004002290A1 (de) * 2004-01-16 2005-08-04 Audi Ag Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
EP2325444A4 (fr) 2012-01-11
EP2325444A1 (fr) 2011-05-25

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