EP2737184A1 - Circuit d'alimentation en huile des butees hydrauliques de soupapes sur un moteur thermique et moteur thermique comportant un tel circuit d'alimentation - Google Patents
Circuit d'alimentation en huile des butees hydrauliques de soupapes sur un moteur thermique et moteur thermique comportant un tel circuit d'alimentationInfo
- Publication number
- EP2737184A1 EP2737184A1 EP12750410.8A EP12750410A EP2737184A1 EP 2737184 A1 EP2737184 A1 EP 2737184A1 EP 12750410 A EP12750410 A EP 12750410A EP 2737184 A1 EP2737184 A1 EP 2737184A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- circuit
- supply circuit
- hydraulic
- ramps
- 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.)
- Granted
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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/104—Lubrication of valve gear or auxiliaries of tappets
-
- 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
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
Definitions
- the invention relates to an oil supply circuit for hydraulic stops for actuating valves on a heat engine and the operation of the engine.
- thermal engine comprising such a circuit.
- air dissolves in the oil, especially during the pumping of the oil into the engine oil distribution section.
- the air is compressed in the oil, in particular between the gears of the oil pump feeding the engine distribution part, is dissolved in the oil in the high pressure circuit zones of the distribution part and separates from the the oil in the open zone where the pressure is reduced.
- the air can constitute within these hydraulic stops a buffer zone which makes the stop flexible and shifts its movement relative to the required movement, which can pose for the engine distribution problems (valve lift at the wrong time, risk collision of valves and pistons) and poor engine clean-up.
- Some heat engines include a hydraulic valve stopper supply circuit which is degassed by a nozzle of a plug disposed at one end of the oil feed ramp of the hydraulic stops. Such degassing requires an additional oil pumping rate for the oil pump. In addition, air zones may form between the nozzle and the upper wall of the ramp.
- the degassing of the supply circuit of the hydraulic stops of the valves is carried out at each end of the hydraulic stop feed ramp by connecting each of the ramp ends to a lubrication supply supply circuit.
- camshaft bearings of the motor This type of circuit requires on the ramp a line of bulging degassing duct which is difficult to achieve, in particular as for its sand molding, involving a core molding box comprising demolding drawer parts (mold sections mounted on spool mechanisms actuated by cams or cylinders).
- the degassing can only be achieved at an inclination of the engine not exceeding 8 ° inclination angle of inclination of the engine relative to the ground.
- a valve actuator hydraulic feed oil supply circuit for a heat engine comprising at least two ramps supplying hydraulic stops of engine valve lines corresponding respectively to the intake and the engine exhaust, the ramps supporting the hydraulic stops arranged in pairs along each ramp, characterized in that each of the ramps comprises, between the two hydraulic stops of each pair, at least one nozzle (calibrated orifice) degassing the oil circulating in the ramp, formed in the upper wall of the ramp.
- This upper wall can be defined with respect to a normal position of use of the circuit, in which the circuit is mounted in the motor, which is not inclined.
- the degassing may be performed at higher inclination angle of the engine than the aforementioned 8 °, up to 30 °.
- said at least one nozzle located between two hydraulic stops of the same pair may be disposed equidistant from said hydraulic stops, which allows a balanced distribution of air degassing over the length of each ramps.
- the nozzles may furthermore be arranged at a median longitudinal level of the upper wall, which makes air degassing more homogeneous in the ramp.
- the supply circuit may comprise a single nozzle between two hydraulic stops of the same pair.
- said at least one nozzle located between two hydraulic stops of the same pair can be disposed at the top of at least one boss (or protuberance) formed on the upper wall of each of the ramps.
- the air is channeled into the boss or bosses, which facilitates its evacuation.
- the nozzles may be each disposed at the top of separate bosses formed on the upper wall of the ramps. Each nozzle is then made on a corresponding boss, which facilitates the completion of each ramp, in particular by molding, choosing suitable shapes.
- bosses may be identical.
- the bosses may have an upwardly tapered shape, for example a cone or polyhedron shape, which optimizes the ducting of the air bubbles in the bosses and / or the realization of the bosses by molding.
- the apex angle of the tapered shape may be less than or equal to 140 °.
- the polyhedron may for example have a base and four faces, and in particular two opposite faces extending transversely to the ramp. These opposite faces may be triangular (eg isosceles triangles).
- This polyhedron may also be a prism or a pyramid, possibly truncated.
- the perpendicular bisector of each of the bosses is preferably arranged close to the vertical (direction parallel to the gravity vector in the normal position of use of the circuit).
- the bosses may advantageously be disposed at equal distance from two adjacent hydraulic stops, which equilibrates degassing over the length of the ramp and between the stops.
- the nozzles of each of the ramps can lead directly into the surrounding air of the supply circuit.
- the ramp of the feed circuit then does not include an oil circulation line arranged for degassing as described above. This simplifies the realization of the ramp and avoid air pockets likely to form in this type of degassing line.
- each nozzle may be connected to an oil conduit for supplying an engine valve camshaft bearing with oil.
- This arrangement makes it possible to avoid oil consumption in degassing vent alone.
- the oil pump feeding the fuel system does not suffer pressure loss and can work effectively.
- each nozzle being thus connected to a camshaft bearing, degassing is done on all camshaft bearings.
- FIG. 1 is a perspective view of an oil feed circuit of hydraulic stops of a heat engine according to one embodiment of the invention.
- - fig. 2 is a diagram of this motor inclination circuit.
- the terms upper, lower are defined with respect to a normal position of use of the supply circuit, when the latter is mounted in a thermal engine under normal conditions (engine not inclined).
- the feed circuit 1 shown comprises two ramps 3 of high pressure oil supply hydraulic stops 5 actuating the valves of a heat engine (no represent). These ramps 3 are themselves connected each to the engine oil distribution portion by a lower conduit 7 shown partially.
- One of the ramps 3 corresponds to the engine intake valve line and the other ramp corresponds to the exhaust valve line of the engine. These ramps are generally symmetrical to one another relative to a longitudinal median plane P of the engine.
- the hydraulic stops 5 are arranged on the ramps 3, each facing the valve (not shown) that it actuates. They are thus arranged in pairs 9, regularly along the length of each of the ramps 3.
- bosses 11 are formed on the upper wall 13 of each of the ramps, on each of the pairs 9 of two hydraulic stops 5. These bosses January 1 are each disposed equidistant from each of the two hydraulic stops 5 of the same pair 9.
- the bosses 1 1 have a 5-sided polyhedron shape, whose base 15 extends over the width of the upper wall 13 of the ramp, transversely thereto.
- the polyhedron comprises two opposite faces 17 extending transversely to the ramp, inclined towards each other on the side of their summit. These two faces 17 are isosceles triangles. The distance between these two faces 17 is a few millimeters, for example 2 to 10 millimeters.
- the height or perpendicular of the boss passing through its apex 19 is arranged close to the vertical (parallel to the gravity vector) under normal conditions (engine not inclined).
- the bosses 1 1 are connected at their apex 19 each to an oil duct 21 leading to a camshaft bearing 23 for actuating the engine valves.
- This duct 21 is intended to lubricate the bearing 23 of the camshaft.
- such a ramp with its bosses can be derived from sand molding by means of relatively simple molding elements, for example assembled one above the other on an inner core, with a mold release type "Flower pot” (in opposite mold extraction) and with simplified tools.
- the high pressure oil conveyed in each of the ramps 3 is conveyed in the bosses 1 1 and in an open zone where the pressure decreases. The oil can begin to degass in these bosses 1 1 and the air bubbles back to the camshaft bearings 23, which does not interfere with the lubrication of the latter.
- the degassing can be performed even under conditions of steep inclination of the engine, as shown in Figure 2, at an inclination of angle ⁇ close to 30 ° of the engine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1156738A FR2978490B1 (fr) | 2011-07-25 | 2011-07-25 | Circuit d'alimentation en huile des butees hydrauliques de soupapes sur un moteur thermique et moteur thermique comportant un tel circuit d'alimentation |
| PCT/FR2012/051682 WO2013014361A1 (fr) | 2011-07-25 | 2012-07-16 | Circuit d'alimentation en huile des butees hydrauliques de soupapes sur un moteur thermique et moteur thermique comportant un tel circuit d'alimentation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2737184A1 true EP2737184A1 (fr) | 2014-06-04 |
| EP2737184B1 EP2737184B1 (fr) | 2015-09-09 |
Family
ID=46724476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12750410.8A Active EP2737184B1 (fr) | 2011-07-25 | 2012-07-16 | Circuit d'alimentation en huile des butees hydrauliques de soupapes sur un moteur thermique et moteur thermique comportant un tel circuit d'alimentation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2737184B1 (fr) |
| ES (1) | ES2547681T3 (fr) |
| FR (1) | FR2978490B1 (fr) |
| WO (1) | WO2013014361A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960016A (ja) * | 1982-09-30 | 1984-04-05 | Honda Motor Co Ltd | カム軸受および油圧式ラツシユアジヤスタの給油通路 |
| JPS6117408U (ja) * | 1984-07-06 | 1986-01-31 | 富士重工業株式会社 | エンジンの潤滑装置 |
| CA1328589C (fr) * | 1985-08-21 | 1994-04-19 | Honda Giken Kogyo Kabushiki Kaisha (Also Trading As Honda Motor Co., Ltd .) | Circuit d'alimentation en huile du mecanisme de commande des soupapes d'un moteur a combustion interne |
| JPS6245912A (ja) * | 1985-08-21 | 1987-02-27 | Honda Motor Co Ltd | 内燃機関の油圧タペツトへの給油装置 |
-
2011
- 2011-07-25 FR FR1156738A patent/FR2978490B1/fr not_active Expired - Fee Related
-
2012
- 2012-07-16 EP EP12750410.8A patent/EP2737184B1/fr active Active
- 2012-07-16 WO PCT/FR2012/051682 patent/WO2013014361A1/fr not_active Ceased
- 2012-07-16 ES ES12750410.8T patent/ES2547681T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013014361A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013014361A1 (fr) | 2013-01-31 |
| EP2737184B1 (fr) | 2015-09-09 |
| ES2547681T3 (es) | 2015-10-08 |
| FR2978490B1 (fr) | 2015-01-30 |
| FR2978490A1 (fr) | 2013-02-01 |
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