EP0984141B1 - Motorbremseinrichtung für eine Brennkraftmaschine - Google Patents
Motorbremseinrichtung für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP0984141B1 EP0984141B1 EP99115707A EP99115707A EP0984141B1 EP 0984141 B1 EP0984141 B1 EP 0984141B1 EP 99115707 A EP99115707 A EP 99115707A EP 99115707 A EP99115707 A EP 99115707A EP 0984141 B1 EP0984141 B1 EP 0984141B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bulge
- valve
- internal combustion
- combustion engine
- brake 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.)
- Expired - Lifetime
Links
Images
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
- F01L1/26—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
Definitions
- the invention relates to an internal combustion engine with a crankcase, in which a crankshaft is rotatably mounted, at least a connecting rod carrying a piston is articulated, the piston in one of a cylinder head to form a combustion chamber covered cylinder is movable, the combustion chamber fuel and combustion air can be supplied, with one in the cylinder head Engine braking device is used, the one with an actuator cooperating brake valve, via which the Combustion chamber can be connected to the exhaust system, and that Brake valve with a valve plate in a recess in the cylinder head base is used, which interacts with a lateral bulge.
- Such an internal combustion engine is known from AT-PS 183 601.
- Document JP 7189636 also discloses one Brake valve configuration according to the generic term of the first claim.
- This internal combustion engine has a brake valve that a control mechanism can be actuated. This is countered by the brake valve the force of a compression spring lifted from a seat.
- the seat is in a recess in the cylinder head recessed, the recess facing towards the cylinder wall has lateral bulge.
- the opening stroke of the brake valve is dimensioned so that it over the depth of the recess Valve plate of the brake valve moved into the combustion chamber. in the Engine brake operation - i.e.
- the invention has for its object an internal combustion engine to provide with an engine brake device, in particular fluidically improved compared to the prior art is.
- the brake valve in the area between at least one exhaust valve and the cylinder side wall the bulge is arranged and covers the valve plate extends at least one outlet valve seat region.
- the bulge is thus from the cylinder side wall to the center of the combustion chamber laid. This results in more favorable flow conditions.
- the internal combustion engine is designed as a four-valve Internal combustion engine, that is, with two intake valves and two exhaust valves the bulge extends to the two side by side Auslrawventilsitz Schemeen. Because the center in one The cylinder head part assigned to the combustion chamber is reserved for the injection valve is this arrangement under the given circumstances a cheap solution. On the one hand, the connection channel between the (or the) outlet channel (outlet channels) and the outlet controlled by the brake valve is short, on the other hand there is just enough space in this area to accommodate the Brake valve including the actuator.
- the bulge extends in an edge area in a chamfer upstream of the exhaust valve seat ring seat about.
- the bulge is so large that the maximum available space in this area of the cylinder head is used is.
- the bulge of the recess Upstream of the combustion chamber and the brake valve still protrudes at maximum opening stroke with the valve disc on the combustion chamber side not out of the recess.
- the depth of the bulge corresponds at least approximately the depth of the chamfer.
- the bulge is machined circular cylindrical shape.
- the bulge simply through a corresponding cylindrical milling tool in the Cylinder head can be incorporated. This is the center of the bulge eccentric to the brake valve axis and also to the central axis of the recess.
- the necessary machining operations can be used one after the other with the corresponding disc milling tools be worked into the cylinder head base.
- the engine brake device shown in Fig. 1 is particularly in a multi-cylinder self-igniting internal combustion engine, which in particular used to drive commercial vehicles.
- the engine brake device has a brake valve 1, which in the open state between a cylinder with the one in it and forth sliding piston and the cylinder head 2 formed combustion chamber 3 via an outlet 28, a connecting channel 4 with a Outlet duct 5 (Fig. 2) connects.
- a connecting channel 4 with a Outlet duct 5 Fig. 2
- a Stowage flap are used, which in an engine brake operation at least partially closed position can be brought.
- the brake valve 1 has a valve disk 6 and on the combustion chamber side an actuating device 7 on the rocker arm space.
- This actuator 7 has a piston 8 which is in a piston bore 9 can be moved in the direction of the brake valve axis.
- This Piston bore 9 is in the embodiment directly in the cylinder head 2 incorporated, but can also be incorporated into a separate component his.
- the piston 8 is supported with its piston inside 10 on the shaft end 11 of the brake valve 1. At this shaft end 11 is still supported by a spring plate 12, the clamping cone 13 is fixed to the valve stem 14, a compression spring 15, the opposite on one on the bottom wall 16 of the piston bore 9 resting pressure plate 17 rests.
- the piston 8 has a System nose 18, which can rest against a cover 19.
- the Cover 19 is with a round seal 20 in an expanded part of the Piston bore 9 inserted and closes an actuating space 21.
- actuating space 21 is a supply line in the Cover 19 or in the cylinder head 2 any medium, for example Compressed air, fuel, hydraulic oil or lubricating oil, controllable fed.
- This medium moves the piston 8, the rest sealingly guided in the piston bore 9 via an O-ring 22 is, in the direction of the combustion chamber 3.
- the brake valve 1 also moved in this direction and the valve plate 6 lifts the valve seat 23 until the underside of the valve plate 6 is at most in the parting plane 24 to the combustion chamber.
- the brake valve 1 provides the flow connection between the combustion chamber 3 via a bulge 26, a recess 27, an outlet 28, a connecting channel 4 the outlet channel 5 free.
- the recess 27 is concentric with that Brake valve axis upstream of the valve seat 23 on the combustion chamber side, while the bulge 26 - also (machining) circular cylindrical trained - eccentric to the brake valve axis so is arranged that it is on the cylinder wall side with the outer boundary the recess 27 coincides and an additional towards the cylinder center Formation in the cylinder head 1.
- the depth ratios are shown in FIG of bulge 26, recess 27 and an exhaust valve seat ring receptacle 29 with an upstream one Chamfer 30 shown. It can be seen that the depth of the bulge 26 does not quite correspond to the depth of the chamfer 30, while the depth of the valve seat ring receptacle 29 a behind is significantly larger. Thus, the spatially in the area (before) the bulge 26 protruding into the outlet valve seat ring receptacle 29 there is no negative influence (weakening) of this area.
- the exhaust valve seat ring receptacle 29 is after finishing of the cylinder head 2, a valve seat ring is inserted and then an exhaust valve, possibly with the insertion of a valve stem guide inserted into the bore 31.
- the position of the bulge 26 is in particular one View of the cylinder head 1 in the area of a combustion chamber Combustion chamber 3 - where the cylinder side wall is shown in dashed lines is - recognizable. It can be seen that the bulge 26 is eccentric to the brake valve axis towards the center of the combustion chamber 3 is aligned. Exactly in the middle of the combustion chamber 3 remaining an opening 32 arranged for an injection valve while on the right side the mounts for intake valves are incorporated are.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve Device For Special Equipments (AREA)
Description
- Fig. 1:
- einen Querschnitt durch den Zylinderkopf im Bereich eines Bremsventils,
- Fig. 2:
- einen Schnitt quer zu dem gemäß Fig. 1 und
- Fig. 3:
- eine brennraumseitige Ansicht des einen Zylinder überdeckenden Zylinderkopfbereiches.
Claims (8)
- Brennkraftmaschine mit einem Kurbelgehäuse, in dem eine Kurbelwelle drehbar gelagert ist, an der zumindest ein einen Kolben tragendes Pleuel angelenkt ist, wobei der Kolben in einem von einem Zylinderkopf unter Bildung eines Brennraums abgedeckten Zylinder bewegbar ist, wobei dem Brennraum Kraftstoff und Verbrennungsluft zuführbar sind, wobei in den Zylinderkopf eine Motorbremsvorrichtung eingesetzt ist, die ein mit einer Betätigungseinrichtung zusammenwirkendes Bremsventil aufweist, über das der Brennraum mit dem Abgassystem verbindbar ist, und wobei das Bremsventil mit einem Ventilteller in eine Ausnehmung im Zylinderkopfboden eingesetzt ist, die mit einer seitlichen Ausbuchtung zusammenwirkt und wobei
das Bremsventil (1) im Bereich zwischen zumindest einem Auslaßventil und der Zylinderseitenwand (33) angeordnet ist und die Ausbuchtung (26) den Ventilteller (6) umfaßt, dadurch gekennzeichnet, daß die Ausbuchtung sich zu zumindest einem Auslaßventilsitzbereich (34) erstreckt. - Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Ausbuchtung (26) sich zu zwei nebeneinanderliegenden Auslaßventilsitzbereichen (34) erstreckt. - Brennkraftmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Ausbuchtung (26) in einem Randbereich in eine der Auslaßventilsitzringaufnahme (29) vorgelagerten Anfasung (30) übergeht. - Brennkraftmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Ausbuchtung (26) der Ausnehmung (27) brennraumseitig vorgelagert ist. - Brennkraftmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß das Bremsventil (1) bei maximalen Öffnungshub mit dem Ventilteller (6) brennraumseitig nicht aus der Ausbuchtung (26) herausragt. - Brennkraftmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Tiefe der Ausbuchtung (26) zumindest angenähert der Tiefe der Anfasung (30) entspricht. - Brennkraftmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Ausbuchtung (26) bearbeitungsmäßig kreiszylinderförmig ausgebildet ist. - Brennkraftmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß das Bremsventil (1) in Richtung der Zylinderachse in dem Zylinderkopf (2) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19839420 | 1998-08-29 | ||
DE19839420A DE19839420A1 (de) | 1998-08-29 | 1998-08-29 | Motorbremseinrichtung für eine Brennkraftmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0984141A2 EP0984141A2 (de) | 2000-03-08 |
EP0984141A3 EP0984141A3 (de) | 2000-06-28 |
EP0984141B1 true EP0984141B1 (de) | 2003-09-24 |
Family
ID=7879172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99115707A Expired - Lifetime EP0984141B1 (de) | 1998-08-29 | 1999-08-06 | Motorbremseinrichtung für eine Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0984141B1 (de) |
DE (2) | DE19839420A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260016A1 (de) * | 2002-12-19 | 2004-07-08 | Deutz Ag | Abgasrückführung bei einer Brennkraftmaschine |
CN106710429A (zh) * | 2016-12-26 | 2017-05-24 | 郑州爱普锐科技有限公司 | 一种内燃机教学用自动制动阀和单独制动阀 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2502650A1 (de) * | 1975-01-23 | 1976-07-29 | Kloeckner Humboldt Deutz Ag | Ventilgesteuerte hubkolben-brennkraftmaschine |
DE3839452A1 (de) * | 1988-11-23 | 1990-05-31 | Daimler Benz Ag | Motorbremsvorrichtung fuer eine brennkraftmaschine |
DE3839450A1 (de) * | 1988-11-23 | 1990-05-31 | Daimler Benz Ag | Motorbremse mit einem im zylinderkopf der brennkraftmaschine angeordneten drosselventil |
JP2970370B2 (ja) * | 1993-12-28 | 1999-11-02 | 三菱自動車工業株式会社 | 同期式エンジンブレーキ装置 |
DE4445917C1 (de) * | 1994-12-22 | 1995-12-07 | Daimler Benz Ag | Motorbremse für eine Dieselbrennkraftmaschine |
-
1998
- 1998-08-29 DE DE19839420A patent/DE19839420A1/de not_active Withdrawn
-
1999
- 1999-08-06 DE DE59907095T patent/DE59907095D1/de not_active Expired - Lifetime
- 1999-08-06 EP EP99115707A patent/EP0984141B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59907095D1 (de) | 2003-10-30 |
EP0984141A3 (de) | 2000-06-28 |
EP0984141A2 (de) | 2000-03-08 |
DE19839420A1 (de) | 2000-03-02 |
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