EP2803826A1 - Dispositif d'actionnement de deux soupapes d'échappement, sollicitées via un pont de soupape, d'un moteur à combustion interne commandé par soupape - Google Patents

Dispositif d'actionnement de deux soupapes d'échappement, sollicitées via un pont de soupape, d'un moteur à combustion interne commandé par soupape Download PDF

Info

Publication number: EP2803826A1
Authority: EP; European Patent Office
Prior art keywords: piston; valve; kze1; cylinder; kze2
Prior art date: 2013-05-02
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.): Granted

Application number

EP13004907.5A

Other languages

German (de)

English (en)

Other versions

EP2803826B1 (fr

Inventor

Robert Wiemann

Georg Maget

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.)

MAN Truck and Bus SE

Original Assignee

MAN Truck and Bus SE

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.)

2013-05-02

Filing date

2013-10-12

Publication date

2014-11-19

2013-10-12 Application filed by MAN Truck and Bus SE filed Critical MAN Truck and Bus SE

2014-11-19 Publication of EP2803826A1 publication Critical patent/EP2803826A1/fr

2015-09-16 Application granted granted Critical

2015-09-16 Publication of EP2803826B1 publication Critical patent/EP2803826B1/fr

Status Active legal-status Critical Current

2033-10-12 Anticipated expiration legal-status Critical

Links

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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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- 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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type

Definitions

the present invention relates to a device for actuating two exhaust valves acted upon by a valve bridge of a valve-controlled internal combustion engine for motor vehicles according to the preamble of patent claim 1.
the object of the invention is to develop the generic device with structurally simple means such that both in regular operation and in engine braking operation or EVB a functionally reliable and trouble-free valve train is preferably achieved in conjunction with an HVA.
the spring acting in the adjusting direction in the EVB function acts without support on the valve bridge on the pistons of both piston-cylinder units (hereinafter referred to simply as KZE). It has been shown that by this structurally simple measure in addition to the saving of a second spring for the KZE2 in the dynamic flow of valve actuation in the EVB function faster response times and a more precise function of the Ab Kunststoff- or outflow in cooperation with the stationary counter-holder can be realized.
the non-spring-loaded valve bridge allows less free movement in the system, faster closure of the discharge channel and the resulting lower wear on the components.
HVA valve gear hydraulic valve clearance compensation element
the cylinder chambers of the KZE1 and KZE2 via a recess or bore in the valve bridge be connected to each other, through which extends the spring designed as a helical spring under support to the piston.
the pistons of the KZE1 and the KZE2 can be guided by adjusting movements enabling limit stops in the corresponding cylinder bores, ie only extend beyond defined Nachstellhübe, on the one hand exclude an inadmissible valve clearance in EVB operation and on the other hand produce a targeted interaction with the outflow channel controlling counter-holder to ensure a safe transition from the EVB operation back into the combustion mode.
a hydraulic valve clearance compensation element can be provided in the power flow between the cam of the camshaft and the valve bridge.
the HVA may be inserted in the valve bridge, in a rocker arm that actuates it, or elsewhere in the power flow between the camshaft driving cam and the exhaust valves.
the piston-cylinder units KZE1 and KZE2 as well as the HVA can be jointly supplied by a pressure circulation lubricating oil system of the internal combustion engine with pressure oil, wherein in the supply line to the piston-cylinder units KZE1, KZE2 and HVA each a pressure-maintaining Check valve is arranged.
a valve-controlled four-stroke reciprocating internal combustion engine diesel engine
two exhaust valves 2, 3 (only the valve shafts are shown) are guided displaceably.
the valves 2, 3 kept closed in a known manner valve springs are not shown.
the valve train acting on the exhaust valves 2, 3 is composed of a driving cam 4 of a camshaft of the internal combustion engine 1, a rocker arm 6 mounted on a fixed rocker shaft 5 and a valve bridge 7, which spans and urges the two exhaust valves 2, 3.
the functionally two-armed rocker arm 6 is designed in two parts, with a cam lever 6a and acting on the valve bridge 7 operating lever 6b, which protrude from the bearing on the rocker shaft 5 to both sides.
the cam lever 6a is mounted by means of a separate pivot axis 8 on the actuating lever 6b and carries a rotatably mounted on an axle 9 roller 10, which starts at the cam 4 for driving the rocker arm 6.
HVA hydraulic valve clearance compensation element
the actuating lever 6b of the rocker arm 6 acts on the valve bridge 7 via an adjusting screw 12 (with lock nut) and a connecting cup 13 mounted spherically thereon at a location positioned between the two outlet valves 2, 3.
a stationary counter-holder 14 is provided above the valve bridge 7, which cooperates with the valve bridge 7 and its function will be explained.
valve bridge 7 Within the valve bridge 7 are two piston-cylinder units KZE1 and KZE2 ( Fig. 2 ), which are coaxially aligned two pistons 15, 16, which are guided displaceably in respective cylinder bores 17, 18 and limit the corresponding cylinder chambers within the valve bridge 7.
the pistons 15, 16 are provided on their outer peripheral surfaces with axially parallel recesses 15a, 16a, which in conjunction with transverse, stationary pins 19 defined Ausfahrbegrenzungen for the pistons 15, 16 form.
Each of the cylinder chambers below the pistons 15, 16 are connected to each other via an axially parallel bore 20, wherein in this bore 20 a continuous screw pressure adjusting spring 21 is used, which acts on the two pistons 15, 16 to the outside, but without being supported on the valve bridge 7.
the spring 21 thus acts within the valve bridge 7 at different piston positions with different bias on the piston 15, 16, as shown in the Fig. 3 and 4 will be explained in more detail.
the cylinder chambers below the pistons 15, 16 are also connected via a central supply bore 22 to the pressure circulation lubricating oil system of the internal combustion engine, wherein in the supply bore 22, a check valve 23 is inserted.
the supply hole 22 is on the one hand tightly closed by a screw 24 and opens on the other hand via a branch channel 25 in the connecting cup 13 and is not shown channels in the connecting cup 13, the adjusting screw 12, the rocker arm 6 and finally on the Kipphebelachse 5 to the pressure circulation Internal combustion engine oil system connected. It is understood that further channels for lubricating the moving parts of the valve train and the pressure oil supply of the HVA 11 are provided in the rocker arm 6.
a discharge bore 16b defined cross-section is provided which cooperates with the anvil 14 and which opens into the underlying, common cylinder space of the KZE1, KZE2; If the piston 16 abuts on the counter-holder 14, the outflow bore 16b is closed.
valve train or the valve bridge 7 The function of the valve train or the valve bridge 7 is based on Fig. 3a to 3c and 4a to 4c explained in more detail.
the upper position of the valve bridge 7 is marked with the dashed line OT (rocker roller 10 of the rocker arm 6 on the cam base circle) and UT (largest, constructive valve lift).
the valve bridge 7 acts on the exhaust valves 2, 3 according to the Fig. 3a to 3c .
the HVA 11 can compensate for a valve clearance in the valve train reliable, since the force of the adjusting 21 as already stated above no counterforce on the valve bridge 7 on the adjusting spring (not shown) of the HVA 11 can exercise or only on the piston 15, 16 supported is.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Valve Device For Special Equipments (AREA)
Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

EP13004907.5A 2013-05-02 2013-10-12 Dispositif d'actionnement de deux soupapes d'échappement, sollicitées via un pont de soupape, d'un moteur à combustion interne commandé par soupape Active EP2803826B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102013007468.1A DE102013007468A1 (de)	2013-05-02	2013-05-02	Vorrichtung zum Betätigen zweier über eine Ventilbrücke beaufschlagter Auslassventile einer ventilgesteuerten Brennkraftmaschine

Publications (2)

Publication Number	Publication Date
EP2803826A1 true EP2803826A1 (fr)	2014-11-19
EP2803826B1 EP2803826B1 (fr)	2015-09-16

Family

ID=49385080

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP13004907.5A Active EP2803826B1 (fr)	2013-05-02	2013-10-12	Dispositif d'actionnement de deux soupapes d'échappement, sollicitées via un pont de soupape, d'un moteur à combustion interne commandé par soupape

Country Status (6)

Country	Link
US (1)	US9062574B2 (fr)
EP (1)	EP2803826B1 (fr)
CN (1)	CN104131851B (fr)
BR (1)	BR102013027416B1 (fr)
DE (1)	DE102013007468A1 (fr)
RU (1)	RU2657398C2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1526257A2 (fr) *	2003-10-24	2005-04-27	MAN Nutzfahrzeuge Aktiengesellschaft	Dispositif de frein moteur pour un moteur à combustion interne à 4 temps
EP2143896A1 (fr) *	2008-07-11	2010-01-13	MAN Nutzfahrzeuge Aktiengesellschaft	Moteur à combustion interne doté d'un dispositif de frein moteur
US20100319657A1 (en)	2009-06-02	2010-12-23	Jacobs Vehicle Systems, Inc.	Method and system for single exhaust valve bridge brake
EP2305967A1 (fr) *	2009-10-02	2011-04-06	MAN Truck & Bus AG	Moteur à combustion interne doté d'un dispositif de frein moteur
EP2305968A1 (fr) *	2009-10-02	2011-04-06	MAN Truck & Bus AG	Moteur à combustion interne doté d'un dispositif de frein moteur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1969207A4 (fr) *	2005-12-28	2012-03-07	Jacobs Vehicle Systems Inc	Procede et systeme pour frein a cycle de resistance de fuite partielle
DE102010011454B4 (de) *	2010-03-15	2020-08-06	Schaeffler Technologies AG & Co. KG	Hubkolbenbrennkraftmaschine mit Dekompressionsmotorbremse

2013
- 2013-05-02 DE DE102013007468.1A patent/DE102013007468A1/de not_active Withdrawn
- 2013-10-12 EP EP13004907.5A patent/EP2803826B1/fr active Active
- 2013-10-24 BR BR102013027416-0A patent/BR102013027416B1/pt active IP Right Grant
2014
- 2014-04-07 RU RU2014113532A patent/RU2657398C2/ru active
- 2014-05-01 US US14/267,260 patent/US9062574B2/en active Active
- 2014-05-05 CN CN201410185625.XA patent/CN104131851B/zh not_active Expired - Fee Related

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1526257A2 (fr) *	2003-10-24	2005-04-27	MAN Nutzfahrzeuge Aktiengesellschaft	Dispositif de frein moteur pour un moteur à combustion interne à 4 temps
EP2143896A1 (fr) *	2008-07-11	2010-01-13	MAN Nutzfahrzeuge Aktiengesellschaft	Moteur à combustion interne doté d'un dispositif de frein moteur
DE102008061412A1 (de)	2008-07-11	2010-01-14	Man Nutzfahrzeuge Ag	Hydraulischer Ventil- und EVB-Spielausgleich
US20100319657A1 (en)	2009-06-02	2010-12-23	Jacobs Vehicle Systems, Inc.	Method and system for single exhaust valve bridge brake
EP2305967A1 (fr) *	2009-10-02	2011-04-06	MAN Truck & Bus AG	Moteur à combustion interne doté d'un dispositif de frein moteur
EP2305968A1 (fr) *	2009-10-02	2011-04-06	MAN Truck & Bus AG	Moteur à combustion interne doté d'un dispositif de frein moteur

Also Published As

Publication number	Publication date
RU2657398C2 (ru)	2018-06-13
RU2014113532A (ru)	2015-10-20
US20140326203A1 (en)	2014-11-06
US9062574B2 (en)	2015-06-23
CN104131851A (zh)	2014-11-05
CN104131851B (zh)	2017-10-13
DE102013007468A1 (de)	2014-11-06
BR102013027416A2 (pt)	2015-09-01
BR102013027416B1 (pt)	2021-07-27
EP2803826B1 (fr)	2015-09-16

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Publication	Publication Date	Title
EP2305967B1 (fr)	2015-07-08	Moteur à combustion interne doté d'un dispositif de frein moteur
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