CN206129343U - Diesel engine cam shaft - Google Patents
Diesel engine cam shaft Download PDFInfo
- Publication number
- CN206129343U CN206129343U CN201621079238.9U CN201621079238U CN206129343U CN 206129343 U CN206129343 U CN 206129343U CN 201621079238 U CN201621079238 U CN 201621079238U CN 206129343 U CN206129343 U CN 206129343U
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- cam
- exhaust
- diesel engine
- admission
- oil pump
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Abstract
The utility model relates to a diesel engine cam shaft, including an inlet cam, an exhaust cam, the 2nd inlet cam, the 2nd exhaust cam, the 3rd inlet cam, the 3rd exhaust cam, fourth inlet cam and the fourth exhaust cam who sets gradually, be equipped with low pressure oil pump cam between fourth inlet cam and the fourth exhaust cam, an inlet cam's left side is equipped with a high -pressure oil pump cam, be equipped with the 2nd high -pressure oil pump cam and the 3rd high -pressure oil pump cam between an inlet cam and the exhaust cam, be equipped with fourth high -pressure oil pump cam between an exhaust cam and the 2nd inlet cam. The utility model discloses a camshaft overall structure is reasonable, and the overall arrangement is compact, can effectual balanced distribution and the oil spout between the proportion, make it more smooth and easy.
Description
Technical field
This utility model is related to a kind of cam shaft for diesel engine.
Background technology
Vitals of the camshaft as Diesel engine valve actuating mechanism, the overall performance of its performance and quality to electromotor
Directly affect.The dynamic transfer system of conventional diesel engine is more, causes diesel engine complicated integral structure, and volume is larger；Together
When, by the way of bearing shell, bearing shell needs out oil leab and oil-way to the camshaft major part of conventional diesel engine, and what is had is convex
Wheel shaft opens a long oil through, in bearing journal flank hole, for lubrication shaft bushing, such difficulty of processing in centre
Greatly, lubricating system sealing structure is more complicated, and in the centre drill elongated hole of camshaft and in axle journal flank hole, affects convex
The intensity of wheel shaft, machining accuracy are relatively difficult to ensure card.
The content of the invention
In order to overcome the drawbacks described above under prior art, the purpose of this utility model is to provide a kind of diesel engine cam
Axle, makes diesel engine overall structure more concision and compact by the Curve guide impeller to conventional cam axle construction, and efficiency is more preferably.
The technical solution of the utility model is：
A kind of cam shaft for diesel engine, it is convex including the first admission cam, first exhaust cam, the second air inlet for setting gradually
Wheel, second exhaust cam, the 3rd admission cam, the 3rd exhaust cam, the 4th admission cam and the 4th exhaust cam, the described 4th
Low pressure fuel pump cam is provided between admission cam and the 4th exhaust cam, on the left of second admission cam, some high pressure is provided with
Cam of injection pump.
Preferably, the quantity of the high-pressure oil pump cam is four.
Preferably, the first high-pressure oil pump cam be located at first admission cam left side, the second high-pressure oil pump cam and
3rd high-pressure oil pump cam is located between first admission cam and first exhaust cam, and the 4th high-pressure oil pump cam is located at institute
State between first exhaust cam and the second admission cam.
Preferably, the molded line all same of admission cam shaft and exhaust cam shaft.
Preferably, the admission cam shaft is different from valve opening and closing angle on exhaust cam shaft.
Preferably, the port timing angle of the admission cam shaft is：Inlet valve is 22-26 ° before piston exhaust top dead center
Open, the 53-57 ° of closing after piston exhaust bottom dead center.
Preferably, the port timing angle of the exhaust cam shaft is：Exhaust valve does work 55-59 ° before bottom dead center in piston
Open, close in piston acting after top dead center 25-29 °.
Preferably, the camshaft left and right sides is equipped with rolling bearing.
Preferably, stop back-up ring is additionally provided between the camshaft and the rolling bearing.
Preferably, second admission cam and second exhaust cam and the 3rd admission cam and the 3rd exhaust cam
Between be equipped with needle bearing.
The beneficial effects of the utility model are：
This utility model with camshaft directly drive low pressure fuel pump, can be at regular time and quantity to high-pressure oil pump convey fuel oil,
Reduce the transmission dynamical system that a set of oil transfer pump drives.
This utility model directly drives high-pressure oil pump with camshaft, can be at regular time and quantity by fuel injector into four cylinders
Conveying high-pressure fuel oil, it is ensured that fuel oil is sufficiently mixed burning with air, makes diesel engine export more preferable power, and reduces a set of
The dynamic transfer system of high-pressure oil pump.
The Profile Design of this utility model cam rationally, disclosure satisfy that the related request of robust motion and distribution.
This utility model is supported to camshaft using two rolling bearings and two needle bearings, it is ensured that cam
The axially position of axle, while making the simpler practicality of lubricating system.
This utility model camshaft reasonable integral structure, compact in design effectively can be balanced between distribution and oil spout
Ratio so as to more smooth.
Description of the drawings
Fig. 1 is structure diagram of the present utility model.
Specific embodiment
Referring to Fig. 1, the utility model discloses a kind of cam shaft for diesel engine, including the first admission cam 1 for setting gradually,
First exhaust cam 2, the second admission cam 3, second exhaust cam 4, the 3rd admission cam 5, the 3rd exhaust cam the 6, the 4th enter
Gas cam 7 and the 4th exhaust cam 8, are provided between the 4th admission cam and the 4th exhaust cam and are matched with low pressure fuel pump 16
The low pressure fuel pump cam 9 of conjunction, is provided with some high-pressure oil pumps being engaged with high-pressure oil pump 17 on the left of second admission cam
Cam.
This utility model is mainly used in four-stroke natural aspiration water-cooled diesel engine, the angle lifting curve of camshaft
The valve that diesel engine can accurately be controlled with related timing angle is opened on time and is closed, so as to ensure in cylinder
There is the air of abundance, it is ensured that the mixed gas burning in cylinder is abundant, makes electromotor preferably export power.
In addition, this utility model also provides the power transmission of fuel delivery and injection timing system.At the rear portion of camshaft
One low pressure fuel pump cam of Position Design, drives low pressure fuel pump plunger upward and downward by eccentric setting, can be by fuel oil from oil
Case is transported to high-pressure oil pump.Four high-pressure oil pump cams are designed in the front position of camshaft, respectively four cylinders provide fixed
The fuel oil of amount, by the integrated low-voltage cam of injection pump on camshaft and high-pressure oil pump cam, drives high-pressure oil pump to stop on piston
The front 11 ° of unlatchings of point, are that the injection system of diesel engine provides accurate distributive value and injection pressure on time, it is ensured that diesel engine fuel oil fires
That what is burnt is more abundant.
The molded line of the low pressure fuel pump cam and the design of cam eccentric shaft, the surface of cam and the plunger roller table of oil transfer pump
Face contacts, and roller and plunger are integral type structure, and camshaft rotarily drives the roller rotation of oil transfer pump and roller and plunger
Move up and down together, so that low pressure fuel pump draw fuel delivers fuel into high-pressure oil pump from fuel tank.Due to cam
Enough lifts are needed, by offset how much ensureing lift, so as to ensure that high-pressure oil pump there are enough fuel oils.Low pressure oil
The molded line of pump cam is an off-centre operation, and according to high-pressure oil pump, offset needs that how many fuel oils are calculated, it is ensured that supply high pressure
The enough fuel oils of oil pump.Eccentric direction is in a plane and identical with keyway direction with keyway, is also contemplated that during angle design
High-pressure oil pump needs the moment of fuel oil.
The quantity of the high-pressure oil pump cam is four, corresponding with the quantity of high-voltage oil cylinder.The type of high-pressure oil pump cam
Line is designed with a maximum lift point, needs to calculate plunger of the cam in whole lift starting point to maximum lift stage high pressure oil pump
It is mobile how many, the amount and fuel pressure of the fuel oil of needs are sprayed into engine cylinder body, sending out for cylinder of diesel engine 1-3-4-2 is realized
Fiery order, makes air and fuel oil in engine cylinder body be sufficiently mixed according to a certain percentage.Gas compression expands pusher piston
Move up and down, power is outwards exported by bent axle, so that electromotor has good fuel economy and fuel power.It is high
The starting point of pressure oil pump cam profile lift is designed with suitable angle relative to admission cam, and this angle is in piston top dead center
Front 11 ° of unlatchings, and a range of adjustment can be carried out by the pad of the hydraulic oil pump housing, to eliminate engine movements part
In some foozles, it is ensured that engine piston oil spout in certain altitude before compression top center, make cylinder interior gas outside
The power of output is optimal.
Specifically, by designing analysis, the first high-pressure oil pump cam 10 is located at into the left side of first admission cam, the
Two high-pressure oil pump cams 11 and the 3rd high-pressure oil pump cam 12 are located between first admission cam and first exhaust cam, the
The using effect that four high-pressure oil pump cams 13 are located at camshaft when between the first exhaust cam and the second admission cam is optimal,
The work efficiency of camshaft can be made to be in optimum state.
The molded line all same of above-mentioned admission cam shaft and exhaust cam shaft.It is designed to simplify camshaft whole using identical
The difficulty of processing of body, improve production efficiency.
The admission cam shaft from exhaust cam shaft Fructus Persicae point it is different with the angle angle of keyway, i.e., the unlatching of valve with
Closing angle（Port timing angle）It is different.The inlet valve of the admission cam shaft is 22-26 ° before piston exhaust top dead center（It is excellent
Select 24 °）Open, 53-57 ° after piston exhaust bottom dead center（It is preferred that 55 °）Close, make new gas enter cylinder；The exhaust cam
The exhaust valve of axle does work 55-59 ° before bottom dead center in piston（It is preferred that 57 °）Open, in piston acting after top dead center 25-29 °（It is preferred that
27°）Close, discharge waste gas.
The camshaft left and right sides is equipped with rolling bearing 14, and the rolling bearing is the axis of rolling with stop back-up ring
Hold.Rolling is equipped between second admission cam and second exhaust cam and the 3rd admission cam and the 3rd exhaust cam
Needle bearing 15.Rolling bearing and needle bearing are changed to by four bearing journals by camshaft, so as to ensure the axle of camshaft
To positioning, increase the intensity of camshaft itself, process the supporting of body and be more prone to.
Make this utility model there is no oil leab and oil-way using above-mentioned design, make diesel-engine body and camshaft
Processing is relatively easy, and good processing accuracy, lubricating system are relatively easy.In the front end of camshaft from the rolling with stop back-up ring
Bearing, it can also be ensured that the axially position of camshaft.The lubricating system of the rolling bearing and needle bearing is by returning on body
Oilhole is lubricated through camshaft bearing, and lubricating system is simpler easy, and lubricant effect is more preferably.
This utility model using when the version of camshaft can be put in adopting in Diesel engine, in body cam
The housing of low pressure oil transfer pump and high-pressure oil pump is fixed on the installation of body by the appropriate location processing hole of axle side and mounting plane
In plane, the roller of low pressure fuel pump and high-pressure oil pump is connected with the cam face of camshaft of the present utility model by the hole of body
Touch, drive fuel feed pump plunger to move up and down, make low pressure fuel pump from fuel tank oil suction and will be delivered to high-pressure oil pump, high-pressure oil pump passes through
Fuel injector sprays into fuel oil in cylinder, and oil pipe is arranged in the outside of electromotor.
Bearing with thrust back-up ring is mounted in the front end of camshaft, processes stopping for appropriate depth in the front end face of diesel-engine body
Groove is pushed away, camshaft vibration backward is limited, cam shaft retaining ring is installed on the rear end face of body, limit camshaft vibration forward.Axle
The lubrication held is connected with the spill port on body by the spill port on cylinder cap, lubricating oil through the position of camshaft bearing, so as to
Lubrication bearing.
Disclosed in this utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill
Art means are, outside the further restriction of another technological means, can to form some different technical schemes in any combination.
Claims (10)
1. a kind of cam shaft for diesel engine, it is characterised in that including the first admission cam, first exhaust cam for setting gradually, second
Admission cam, second exhaust cam, the 3rd admission cam, the 3rd exhaust cam, the 4th admission cam and the 4th exhaust cam, institute
State and low pressure fuel pump cam is provided between the 4th admission cam and the 4th exhaust cam, if being provided with the left of second admission cam
Dry high-pressure oil pump cam.
2. cam shaft for diesel engine as claimed in claim 1, it is characterised in that the quantity of the high-pressure oil pump cam is four.
3. cam shaft for diesel engine as claimed in claim 2, it is characterised in that the first high-pressure oil pump cam enters positioned at described first
The left side of gas cam, the second high-pressure oil pump cam and the 3rd high-pressure oil pump cam are located at first admission cam and first exhaust
Between cam, the 4th high-pressure oil pump cam is located between the first exhaust cam and the second admission cam.
4. cam shaft for diesel engine as claimed in claim 3, it is characterised in that admission cam shaft is equal with the molded line of exhaust cam shaft
It is identical.
5. cam shaft for diesel engine as claimed in claim 4, it is characterised in that on the admission cam shaft and exhaust cam shaft
Valve opening is different with closing angle.
6. cam shaft for diesel engine as claimed in claim 5, it is characterised in that the port timing angle of the admission cam shaft is：
Inlet valve 22-26 ° of opening before piston exhaust top dead center, the 53-57 ° of closing after piston exhaust bottom dead center.
7. cam shaft for diesel engine as claimed in claim 5, it is characterised in that the port timing angle of the exhaust cam shaft is：
Exhaust valve is opened for 55-59 ° before bottom dead center in piston acting, is closed in piston acting after top dead center 25-29 °.
8. the cam shaft for diesel engine as described in any one in claim 1-7, it is characterised in that the camshaft left and right sides
It is equipped with rolling bearing.
9. cam shaft for diesel engine as claimed in claim 8, it is characterised in that between the camshaft and the rolling bearing also
It is provided with stop back-up ring.
10. cam shaft for diesel engine as claimed in claim 9, it is characterised in that second admission cam and second exhaust cam
And needle bearing is equipped between the 3rd admission cam and the 3rd exhaust cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621079238.9U CN206129343U (en) | 2016-09-26 | 2016-09-26 | Diesel engine cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621079238.9U CN206129343U (en) | 2016-09-26 | 2016-09-26 | Diesel engine cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206129343U true CN206129343U (en) | 2017-04-26 |
Family
ID=58568918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621079238.9U Active CN206129343U (en) | 2016-09-26 | 2016-09-26 | Diesel engine cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206129343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638094A (en) * | 2022-11-03 | 2023-01-24 | 山东泰展机电科技股份有限公司 | Cam type air pump |
-
2016
- 2016-09-26 CN CN201621079238.9U patent/CN206129343U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638094A (en) * | 2022-11-03 | 2023-01-24 | 山东泰展机电科技股份有限公司 | Cam type air pump |
| CN115638094B (en) * | 2022-11-03 | 2023-08-25 | 山东泰展机电科技股份有限公司 | Cam type air pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 301700 Building 1, No. 36, Jingbin Avenue, Jingbin Industrial Park, Wuqing District, Tianjin Patentee after: Beinei diesel engine (Tianjin) Co.,Ltd. Address before: No. 1, liuhezhuang, dahongmen, Fengtai District, Beijing 100076 Patentee before: BEIJING BEINEI DIESEL ENGINE Co.,Ltd. |
|
| CP03 | Change of name, title or address |