CN100378299C

CN100378299C - Engine lubrication system

Info

Publication number: CN100378299C
Application number: CNB2004100326106A
Authority: CN
Inventors: 小田岛亮悦
Original assignee: Petroliam Nasional Bhd Petronas
Current assignee: Petroliam Nasional Bhd Petronas
Priority date: 2003-03-25
Filing date: 2004-03-25
Publication date: 2008-04-02
Anticipated expiration: 2024-03-25
Also published as: CN1550645A

Abstract

An improved internal combustion engine lubricating system that includes an oil filter that is mounted on a mounting bracket that is fixed to a side face of an engine component that has direct communication with the oil pump and the engine main oil gallery to minimize the number of passages that must be sealed to prevent leakage and to make a more compact assembly.

Description

Internal-combustion engine with lubrication system

Technical field

The present invention relates to a kind of internal-combustion engine, more particularly relate to the lubrication system of this motor.

Background technique

As everyone knows, internal-combustion engine needs lubrication system to provide lubricated for its moving element.Except lubricating function, oiling agent can also play the effect of cooled engine usually at least in part.Concerning four-stroke at least motor, lubrication system comprises that the oiling agent storage tank of a kind of lubricant storage, the oiling agent to storage carry out supercharging and make oiling agent by suitable channel flow oil pump and loop of returning container to lubricated zone.Usually, also be furnished with oil filter, recycle oil by holding back down the impurity of carrying secretly, and stops these impurity to arrive lubricated surface from this oil filter.Oil filter usually links to each other with heat exchanger with auxiliary cooling down operation.

Therefore, lubrication system needs many parts, promptly the driver of and a plurality of pumps, filter device, and form and provide lubricant oil to flow, return and the necessary passage by filter cleaner.Because filter cleaner generally includes a filter cylinder that needs repairing, so access and for ease of maintenaince just extremely important.

Publication number be flat 6-299863 Japanese Patent Application Publication the typical approach that addresses this problem of a kind of prior art.As can be known, motor has an inside that the cylinder block of cylinder-bore is arranged from this article.The dividing plate and the cylinder block that form and be fixed on its lower surface in cylinder block discretely play the effect of supporting bent axle.The food tray that separates is fixed on the lower surface of dividing plate, is subjected to the oil pump of crank-driven to be supported in the top of dividing plate, and is hanging in the food tray.Except this structure, under the conventional situation, motor has the support that stretches out from engine main body, can pull down ground fixation machine oil rectifier.The oily passage of oil circuit, dividing plate and the support of oil filter by being positioned at cylinder block is connected with motor.So just caused having the layout of a complexity of the connected node that a large amount of needs effectively seal.

The patent No. is another example that discloses this complex arrangement in 5647315 the U. S. Patent.This layout has also increased oil cooler on the oil filter main body, further make tubing system and cooling passage complicated.Simultaneously, also a bit complexity and volume are bigger for the erecting device of filter element.

Therefore, a basic purpose of the present invention just is to provide a kind of effective oil filter to install and connection set, and it can reduce the quantity of connected node, and provides more freedom when filter cleaner is installed.In addition, another object of the present invention is under the situation of not damaging maintainability performance, simplifies also fitting machine oil rectifier more compactly.

Summary of the invention

The present invention is applicable to internal-combustion engine and lubrication system.Motor comprises an engine main body of being made up of cylinder block and cylinder cap assembly, and cylinder block inside has at least one cylinder-bore, is attached on cylinder block one end to cylinder cap assembly shifter cylinder hole.Piston moves back and forth in cylinder-bore, and drives bent axle.The other end and cylinder block that crankcase component is fixed on block assembly match with axle journal installation bent axle.Crankcase component comprises a food tray spare that is used for collecting lubricant oil from motor.Oil pump is subjected to crank-driven, and overhangs in the food tray at least in part.Pad is installed to be positioned on the side surface of motor one single parts.The oil transportation channel that is positioned at single parts is connected with oil pump, and ends at the oil transportation mouth that passes side surface and be positioned at the installation pad.The oil drain passage that the oil that is used for filtering is transported in the motor also is positioned at single parts, and its starting point is to pass the side and be positioned at the oil drain out that pad is installed.Be attached to install on the pad and finish this assembly being attached at oil filter on the support, this support is fit to pull down ground fitting machine oil rectifier.

Description of drawings

Fig. 1 is an internal-combustion engine and according to the front elevation of the accessory drive device of embodiment of the invention structure.

Fig. 2 amplifies front elevation along the motor that the direction identical with Fig. 1 looked, and wherein the timing cover of motor has been removed.

Fig. 3 is the side view of motor.

Fig. 4 is the amplification cross-sectional view that is intercepted along the line 4-4 direction among Fig. 2.

Fig. 5 is the side view of looking along the direction identical with Fig. 3, only with solid line cylinder block and crankcase component and the engine accessory power ratings more shown in broken lines that assemble is shown.

Fig. 6 is along the oil filter of looking with Fig. 1 equidirectional and the zoomed-in view of mounting structure thereof, and the some of them part is cutd open, and is shown as sectional view.

Embodiment

Now, in detail with reference to accompanying drawing, mainly with reference to accompanying drawing 1-3, implement a multicylinder four-stroke internal combustion engine of the present invention and represent by mark 11 generally during beginning.In the specific embodiment that illustrates, motor 11 is depicted as the cylinder with four linear array.Certainly, by following description, applying the present invention to have in the motor of the motor of other number of cylinders and other engine construction, is apparent to those skilled in the art.In addition, the invention is not restricted to motor with four-stroke principle work.

Motor 11 is suitable for being installed on the vehicle as automobile etc. and promotes them, and is described to vertically be installed on wherein, but the present invention is not limited to so.Motor 11 has an engine main body that is supported with suitable method by the vehicle body (not shown), generally by 12 expressions.Engine main body 12 comprises cylinder block, generally by 13 expressions.Cylinder block 13 has 15 the cylinder-bore 14 (Fig. 2) of paralleling to the axis by four and forms.By the dividing plate of 16 expressions, be attached at cylinder block 13 lower ends generally, to form the top of crankcase component in known detachable mode.

Cylinder cap assembly 17 is fixed on the upper surface of cylinder block 13 and the upper end in closed cylinder hole 14 in a kind of known mode.The same with prior art, cylinder cap assembly 17 supporting is used for joining the air inlet of engine chamber and the waste gas all valves from its discharge with suitable manner control.To handle these valves in this way.The valve mechanism cover 18 that valve and operating device are fixed on cylinder head 17 upper surfaces is closed.

Upper half part of aforementioned crankcase component is formed by the bottom and the dividing plate 16 of cylinder block 13, and by finishing and close aforementioned crankcase component by the food trays of 19 expressions generally, food tray is fixed on the lower surface of dividing plate 16 suitably and holds lubricant oil.

Motor 11 have can be in cylinder-bore 14 pistons reciprocating 21, piston connects to drive bent axle 23 by connecting rod 22.Axle 24 rotations that bent axle 23 stretches out around level normally.Bent axle 23 carries out axle journal around axis 24 by bearing to be installed, and these these bearings are installed in known manner by cylinder body 13 and dividing plate 16

Aforesaid suction valve and outlet valve are operated by the valve actuating mechanism with suitable manner, and this actuating mechanism is generally by 25 expressions.Valve actuating mechanism 25 comprises an admission cam shaft 26 and an exhaust cam shaft 27, and they engage in suitable exercisable mode with suction valve and outlet valve respectively.Camshaft 26 and 27 axis extend with the axis 24 of bent axle 23 with paralleling.Timing chain 28 makes the sprocket wheel on the end that is arranged on bent axle 23 be connected with each other with the sprocket wheel that is positioned on

camshaft

26 and 27 ends, thereby to drive them with half the timing relation that is its rotational speed.

As mentioned above, cylinder block 13 is made by casting, preferably formed by low-voltage cast aluminum, and cylinder cap 17 is manufactured from the same material, and is fixed in known manner on the cylinder block upper surface.Aforementioned crankcase component, specifically the upper flange 29 of dividing plate 16 is fixed on the aforementioned crankshaft group in any suitable manner.Food tray 19 has: the food tray main body 13 of dish type normally, and this main body 31 is open upwards; Outside flange 32, it and food tray 31 upper outer edges form one, and the lower surface sealing engagement of this upper outer edges and dividing plate 16 is to increase the rigidity of this structure.

Motor 11 is provided with many annexes, these annexes be arranged on engine main body 12 outer lateral near.The some of them annex is used for engine operation, and other are used for vehicle or other purposes.These annexes comprise the air compressor 33 that is used for vehicle air conditioning, be used for cooling liquid is transported in the coolant jacket that is formed on engine main body 12 engine cooling liquid pump 34 with cooled engine main body 12, is used for producing the alternator 35 of vehicle and the required electric energy of engine ignition and is used for the power steering pump 36 of power-assisted Vehicular turn.Each

annex

33,34,35 and 36 all in known manner, drive by belt pulley 37 by serpentine band 38, and belt pulley is fixed on the bent axle 23.

As mentioned above, the driven annex of motor comprises coolant pump 34.Pump 34 has a shell, and this shell and cylinder block 13 constitute an integral body and work to reinforce it.Shell comprises discharges tracheal portion 39, and this tracheal portion 39 is connected with the coolant jacket 41 (Fig. 2) that is formed in the cylinder body 13 on every side around cylinder-bore 14.These coolant jackets 41 also match with the coolant jacket (not shown) that is positioned at cylinder head 17.Cooling liquid is also with the heat exchanger (not shown) of flowing through of known manner in the prior art.

Except described cooling system, according to the present invention, motor 11 also has one to comprise crankcase component, the lubrication system of food tray 19 specifically.Oiling agent needs lubricated each several part by this system supply to motor 11, as the bearing of bent axle 23 and camshaft 26,27.Lubrication system has the oil pump 42 that directly is bearing on the dividing plate 16, and like this, oil pump 42 stretches out downwards to be placed on the food tray 19 from the lower surface of dividing plate 16.

Oil pump 42 can be any known type, and has a live axle 43, sprocket wheel 44 to be attached at live axle 43 in food tray 19 on the outwardly directed end.Sprocket wheel 44 is driven by Transmitted chains 45, wears chain 45 and is driven by the sprocket wheel 46 that is fixed on bent axle 23 1 ends again.Mainly describe this transmission device more in detail now with reference to Fig. 4.Be provided with a tensioning mechanism, generally by 47 expressions, in order in oil pump Transmitted chains 45, to keep a desirable tension force.Tension device 47 comprises the arm of force 48, and an end of this arm of force pivots on dividing plate 16 by pivot 49, and like this, the other end can be around being rotated by pivot 49 formed axis 51.The other end of the arm of force 48 contacts with chain 45 by spring 52, to keep desirable tension force.

Oil pump 42 provides the lubricant oil of pumping by supply system for the lubricating component of motor 11, and supply system comprises a removable filter cylinder type oil filter, generally by 53 expressions.Filter cleaner 53 is installed on the motor 11, especially, by mounting bracket,, is fixed on the dividing plate 16 generally by 54 expressions with reference to Fig. 6.Mounting bracket 54 is attached in the mode with Short Description and installs on the pad 55, is integrally formed on the side surface of dividing plate 16 and pad 55 is installed.

Except loader oil rectifier 53, mounting bracket 54 has also loaded an oil cooler, generally by 56 expressions.Oil cooler 56 is arranged between mounting bracket 54 and the oil filter 53 in the mode with Short Description.Referring now to Fig. 5, as can be seen, pad 55 to be installed to be formed the outside protuberance of the side surface of dividing plate 16, and be formed into oral cavity 57 and discharge side 58, these two chambeies are arranged on separately by angled that wall comes separately.

Then mainly with reference to Fig. 5 and Fig. 6, oil pump 42 is discharged into the oil of pumping from vertically stretching out the passage 61 that the lower surface of dividing plate 16 stretches out therein in vertical direction as can be seen.Vertical passage 61 is connected with horizontal channel 62, and horizontal channel 62 terminates in entering in the chamber 57 of installation pad 55 via opening 63.

After flow through oil cooler 56 and filter cleaner 53, lubricant oil cooling and that cross filtration is transported in the discharge side 57, in order to the lubricating component that oil is transported to motor 11 is gone, will briefly describe it and carry mode of movement by the opening 64 that is formed at motor 11 main oil gallerys in the dividing plate 16 at first.Opening 64 is connected with the start-up portion (generally by 65 expressions) of motor main oil gallery, and this main oil gallery is formed on the dividing plate 16, as shown in Figure 6.Oil flows to the aforesaid lubricating component of motor from there by known appropriate channel.

Then with reference to Fig. 6, separate the mounting bracket 54 that forms an opposite side projection 66 is arranged as can be seen with in the dividing plate 16, opening is arranged to hold the fastening piece 67 that is used for being connected on the outside installation pad 55 that is positioned at dividing plate 16 lateral external surface on the limit projection 66 with pulling down.

Oil cooler 56 has a conventional annular outer cover 68, and normally flat upper face 69 relies on the shoulder 71 of fastening piece (generally by 72 expressions) to seal with the lower surface that cooperates of mounting bracket 54.Fastening piece 72 has helical thread portion 73, screws in the threaded openings place of mounting bracket 54, thereby between the matching surface 69 of oil cooler 56 and mounting bracket 54 seal washer 74 is installed.

Be built-in with a heat exchanger 75 in oil cooler main body 69, to hold from the flow through engine coolant (Fig. 3) of conduit 76 and device 77 of motor cooling jacket 41.Cooling liquid is flowed through after the heat exchanger 75, turns back in the coolant jacket 41 through return mechanism 78 and return conduit 79.

As shown in Figure 6, already mentioned oil filter 53 is filter cylinder types, comprises the jar shape shell 81 that accommodates any ideal type filter medium 82.Shell is formed with the end wall 83 of threaded opening 84, and opening 84 is spun on the lower thread part 85 of fastening piece 72.Therefore, between the sealed lower surface that is compressed in end wall 83 and heat exchanger body 68 of seal ring 86.

Cylinder block oil passage 62 matches with oil transportation channel 87 in the mounting bracket 54, and the support terminal has a large amount of downward open channels, to be connected with the upper wall of oil cooler 56 in inside regional of gasket seal 74.Many openings 88 are arranged on the oil cooler shell, in these open areas, allow oil to enter into oil cooler 56 along the direction of arrow to cool off.

Similarly, the lower wall of oil cooler shell 68 has many oil drain outs, enters in oil filter end wall 83 zones of seal ring 86 inside to allow oil, flows to shown in the direction of arrow.Then, oil enters oil filter 53 to flow to shown in the arrow, and the filter medium 82 of flowing through is by the opening of end wall 83.

Therefore the oil that cooled off and filtered excessively comes out from filter cleaner 53 and oil cooler 56 through the inner passage 89 that is arranged in fastening piece 72.Then, oil flows into the conveyance conduit 91 that is positioned at mounting bracket 54, flows to shown in the direction of arrow.Conveyance conduit 91 is connected with the start-up portion 65 of the motor main oil gallery that is positioned at dividing plate 16 again, is transported in the motor 11 cooling off and crossing the oil that filters.After lubricated, lubricant oil is returned in the food tray 19 with arbitrary known manner, repeatedly carries in order to oil feed pump 42.

In above-mentioned example, oil filter 53 and oil cooler 56 all are positioned on the axis that is formed by fastening piece 72.Lubricant oil evenly flows vertically by oil filter 53 and oil cooler 56, and returns by the passage 89 that is positioned at fastening piece 72.Therefore, can realize the cooling of 53 pairs of lubricated oil filtrations of oil filter and 56 pairs of lubricant oil of machine oil cooler effectively.

Because all oil transportation channels between oil pump 42, oil cooler 56, oil filter 53 and engine lubrication main oil gallery 65 and return passage all are formed in the main component of single motor, in this case, reduce widely the quantity and the position of desired dividing plate 16, sealing surfaces in the prior art structure, this not only provides cost savings, and leakproof better.Simultaneously and since mounting bracket 54 be one with dividing plate 16 separated components, like this, have multiple choices by the oil filter 53 selecting the various profiles of support 54, just can make all to be fixed on the support 54 and the state and the position of oil cooler 56.Therefore, the proper states of oil filter 53 and oil cooler 56 and the employing of position allow engine main body 12, oil filter 53 and oil cooler 56 to place in the mode of compactness, like this, can prevent that lubrication system is excessive.

Certainly, be readily appreciated that for a person skilled in the art, described specific embodiment is the demonstration that the present invention can adopt, and is not leaving under the situation of the spirit and scope of the present invention that limit as claim, can make variations and modifications.For example, motor 11 can be that the motor of two strokes and/or the axis 15 of cylinder-bore 14 can tilt with respect to Vertical direction.

Claims

1. internal-combustion engine with lubrication system, it comprises engine main body, this main body has: cylinder block, it has at least one and is formed at wherein cylinder-bore; The cylinder cap assembly, it is attached on the end of described cylinder body with closing described cylinder-bore; Piston, it moves back and forth in described cylinder-bore, and drives bent axle; Crankcase component, it is fixed on the other end of described cylinder body and with described cylinder body and matches, and with axle journal described bent axle is installed, and described crankcase component comprises the food tray spare that is used for collecting from the oiling agent of described motor; Oil pump, it is by described crank-driven, and overhangs at least in part and hang in the described food tray; Pad is installed, and it is formed on the side surface of single parts of described motor; Oil transportation channel, it is connected with described oil pump, and it is formed in the described single parts and ends at the oil transportation mouth that passes described side surface and be positioned at described installation pad; Oil drain passage, it is used for carrying in the described motor crossing the oil that filters, and it is formed in the described single parts and the oil drain out that starts from passing described side surface and be positioned at described installation pad; And oil filter, it attaches to support, and support is attached on the described installation pad, and be fit to pull down ground fitting machine oil rectifier.

2. the internal-combustion engine with lubrication system as claimed in claim 1 is characterized in that single parts are parts of crankcase component.

3. the internal-combustion engine with lubrication system as claimed in claim 2 is characterized in that single parts are the dividing plates that are attached with food tray spare on it.

4. the internal-combustion engine with lubrication system as claimed in claim 1, it is characterized in that, also comprise a dividing plate, this dividing plate forms a part that is attached at the crankcase component on the cylinder block lower surface, and bent axle and cylinder block linked together by axle journal, food tray is fixed on the lower surface of described dividing plate.

5. the internal-combustion engine with lubrication system as claimed in claim 4 is characterized in that oil pump is supported by dividing plate.

6. the internal-combustion engine with lubrication system as claimed in claim 5 is characterized in that single parts are dividing plates.

7. the internal-combustion engine with lubrication system as claimed in claim 6 is characterized in that oil pump has an exhaust port that directly is communicated with dividing plate in its inlet end.

8. the internal-combustion engine with lubrication system as claimed in claim 7, the installation pad that it is characterized in that being positioned on the dividing plate forms two fluid chambers that separated by partitioning wall, one of described chamber directly is communicated with oil transportation channel, and another of described chamber directly is communicated with oil drain passage.

9. the internal-combustion engine with lubrication system as claimed in claim 1, it is characterized in that, also comprise a oil cooler by the supporting of oil filter attachment leg, this oil cooler is between described oil filter attachment leg and the oil filter, is used for cooling off the oil that is transported in this oil filter.

10. the internal-combustion engine of lubrication system as claimed in claim 9 is characterized in that single parts are parts of crankcase component.

11. the internal-combustion engine of lubrication system as claimed in claim 10 is characterized in that single parts are the dividing plates that are attached with food tray spare on it.

12. the internal-combustion engine of lubrication system as claimed in claim 9, it is characterized in that also comprising a dividing plate, this dividing plate forms a part that is attached at the crankcase component on the cylinder block lower surface, and bent axle and cylinder block are linked together by axle journal, and food tray is fixed on the lower surface of described dividing plate.

13. the internal-combustion engine with lubrication system as claimed in claim 12 is characterized in that oil pump is supported by dividing plate.

14. the internal-combustion engine with lubrication system as claimed in claim 13 is characterized in that single parts are dividing plates.

15. the internal-combustion engine with lubrication system as claimed in claim 14 is characterized in that oil pump has an exhaust port that directly is communicated with dividing plate in its inlet end.

16. the internal-combustion engine with lubrication system as claimed in claim 15, the installation pad that it is characterized in that being positioned on the dividing plate forms two fluid chambers that separated by partitioning wall, one of described chamber directly is communicated with oil transportation channel, and another of described chamber directly is communicated with oil drain passage.