CN103410643A - Electronic unit composite pump for light-vehicle diesels - Google Patents
Electronic unit composite pump for light-vehicle diesels Download PDFInfo
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- CN103410643A CN103410643A CN2013103065003A CN201310306500A CN103410643A CN 103410643 A CN103410643 A CN 103410643A CN 2013103065003 A CN2013103065003 A CN 2013103065003A CN 201310306500 A CN201310306500 A CN 201310306500A CN 103410643 A CN103410643 A CN 103410643A
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Abstract
The invention relates to the technical field of vehicle engine manufacturing, in particular to an electronic unit composite pump for light-vehicle diesels. The electronic unit composite pump for light-vehicle diesels comprises a composite pump body, an oil conveying pump, a camshaft, a plurality of electronic unit pumps, tappet body assemblies corresponding to the electronic unit pumps and a cam, and is characterized in that the electronic unit pumps are installed on the composite pump body and comprise unit pump bodies, a plunger, control valve elements and electromagnets installed on one sides of the unit pump bodies, the oil conveying pump is installed on one side of the composite pump body, the tappet body assemblies are arranged between the cam and the plunger and comprise tappets, rolling wheels and rolling wheel pins, and U-shaped cavities are formed in the ends where the tappets make contact with the rolling wheels, wherein the plunger and the control valve elements are arranged in the unit pump bodies. The electronic unit composite pump for light-vehicle diesels has the advantages of being more compact in structure and capable of acquiring higher working speed so as to be matched with the high-speed diesels.
Description
Technical field
The present invention relates to mobile engine manufacturing technology field, relate in particular to a kind of diesel engine for light vehicle electronic combination unit pump.
Background technique
At present, in small power high speed diesel engine field, fuel injection system is mainly small-sized inline pump and VE pump, and these two kinds of pumps, due to higher jet pressure can not be provided, reach the requirement of state's four emission standards so be difficult to.Although and high pressure co-rail system can provide high jet pressure, price is high, use and maintenance cost are also very high, can not meet user's user demand.And automatically controlled unipump not only can provide the fuel-injection pressure up to 200MPa, and can realize the flexible control of injection timing, meet the motor emission request, and manufacture cost to compare common rail system low, use and maintenance cost are also low than common rail system, can substantially meet user's usage requirement.But existing automatically controlled unipump on being applied to high-speed diesel engine the time, remains in following defect, the one, its tappet body length, quality are relatively large, unreasonable structure, the impact to cam in high speed operation is large; The 2nd, because existing its camber line corresponding with the plunger descending branch of cam is arc transition, plunger is descended with larger speed in descending branch, cause oil sucting cavity to produce vacuum, cause oil suction insufficient, thereby easily make oil pump pump oil unstable, and then cause engine operation unstable; The 3rd, roller and roller pin relative movement wearing and tearing are very fast, affect working life.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of diesel engine for light vehicle electronic combination unit pump is provided.It can make the electronic combination unit pump system architecture compacter, better meets the usage requirement of high-speed diesel engine.
The technological scheme that the present invention solves the problems of the technologies described above is as follows: a kind of diesel engine for light vehicle electronic combination unit pump, comprise the unipump pump housing, oil transfer pump, camshaft and a plurality of electronically controlled unit pump and tappet body assembly and the cam corresponding with described electronically controlled unit pump, it is characterized in that, described electronically controlled unit pump is arranged on the described unipump pump housing, described electronically controlled unit pump comprises the monomer pump housing and is located at the plunger in the described monomer pump housing, control spool and be arranged on the electromagnet of the described monomer pump housing one side, described oil transfer pump is arranged on a side of the described unipump pump housing, described camshaft is arranged on the bottom of the described unipump pump housing, described cam is arranged on camshaft, described tappet body assembly is located between described cam and described plunger, described tappet body assembly comprises tappet, roller and roller pin, the contact jaw of described tappet and described roller is provided with U-shaped cavity.
The invention has the beneficial effects as follows: be provided with U-shaped cavity by the contact jaw at described tappet and described roller, can be when guaranteeing the original active length of tappet, shorten the tappet body assembly entire length, so also alleviated tappet weight, thereby reduced the inertia of tappet in high-speed motion, because the length of thread engagement between tappet and the monomer pump housing is constant, just can guarantee under the prerequisite that tappet operates steadily, reduce the impact of tappet body assembly to cam, thereby guaranteed operation of oil pump stability.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the degree of depth of described U-shaped cavity is greater than the radius of described roller.
Adopt the beneficial effect of above-mentioned further scheme to be, this position coordinates can more be conducive to the tappet stable operation.
Further, the accelerating sections that the wheel rim of described cam comprises successively ascent stage of being connected, keep section and descending branch, described descending branch to comprise is connected successively, at the uniform velocity section and braking section, described accelerating sections and braking section adopt just profound acceleration cam profile.Described at the uniform velocity section can make the plunger decline that remains a constant speed.
Further, described accelerating sections and braking section and the corresponding angle of circumference of described roller are 40 °.
Adopt the beneficial effect of above-mentioned further scheme to be, the cam of prior art is due to radius arc transition such as descending branch integral body are, work characteristics due to eccentric cam, cause plunger decline process medium velocity fast, time is short, be not suitable for the oil suction requirement, when plunger sharply descends, can produce vacuum, cause oil suction insufficient, thereby cause oil pump feed unstable, and then make engine operation unstable, the present invention is owing to adopting different radius of curvature to form the structure of different sections, cam is steadily descended with lower speed in descending stroke, be conducive to abundant oil suction, avoid forming vacuum, in the injection process that plunger rises, can keep like this fuel feeding stable.
Further, between described roller pin and roller, also be provided with roller housing.
Adopt the beneficial effect of above-mentioned further scheme to be, can reduce the relative friction between roller and roller pin by setting up roller housing, improve working life.
Further, described electronically controlled unit pump is four or six.
Adopt the beneficial effect of above-mentioned further scheme to be, go for six cylinders or four cylinder engine.
Further, also comprise the low pressure oil pocket of being located at the described monomer pump housing, described low pressure oil pocket is two oil channel structures.
Adopt the beneficial effect of above-mentioned further scheme to be, can fully guarantee low pressure oil pocket fuel feeding, and then guarantee not inhaled when high speed pump oil empty.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is sectional view of the present invention;
Fig. 3 is the body modular construction schematic diagram of holding out of the present invention;
Fig. 4 is a kind of cam structure schematic diagram of the present invention;
Fig. 5 is the body modular construction schematic diagram of holding out of prior art;
Fig. 6 is a kind of cam structure schematic diagram of prior art.
In Fig. 1 and Fig. 6,1, the monomer pump housing; 2, electromagnet; 3, control spool; 4, plunger; 5, electronically controlled unit pump; 6, the unipump pump housing; 7, cam; 8, oil transfer pump; 9, camshaft; 10, roller pin; 11, roller; 12, tappet; 13, U-shaped cavity; 14, roller housing; 15, the ascent stage; 16, keep section; 17, accelerating sections; 18, at the uniform velocity the section; 19, braking section.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only be used to explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1 and Figure 4, a kind of diesel engine for light vehicle electronic combination unit pump, comprise the unipump pump housing 6, oil transfer pump 8, camshaft 9 and a plurality of electronically controlled unit pump 5 and tappet body assembly and the cam 7 corresponding with described electronically controlled unit pump 5, it is characterized in that, described electronically controlled unit pump 5 is arranged on the described unipump pump housing 6, described electronically controlled unit pump 5 comprises the monomer pump housing 1 and is located at the plunger 4 in the described monomer pump housing 1, control spool 3 and be arranged on the electromagnet 2 of the described monomer pump housing 1 one sides, described oil transfer pump 8 is arranged on a side of the described unipump pump housing 6, described camshaft 9 is arranged on the bottom of the described unipump pump housing 6, described cam 7 is arranged on camshaft 9, described tappet body assembly is located between described cam 7 and described plunger 4, described tappet body assembly comprises tappet 12, roller 11 and roller pin 10, described tappet 12 is provided with U-shaped cavity 13 with the contact jaw of described roller 11.
The degree of depth of described U-shaped cavity 13 is greater than the radius of described roller 11.
As shown in Figure 5, for the body modular construction schematic diagram of holding out of prior art, compare with the present invention shown in Figure 3, can find out the obvious difference of both structures.In this example, in the situation that keep tappet excircle length constant, the present invention's body assembly overall length of holding out can shorten 25% than the assembly overall length of prior art.
The accelerating sections 17 that the wheel rim of described cam 7 comprises successively ascent stage 15 of being connected, keep section 16 and descending branch, described descending branch to comprise is connected successively, at the uniform velocity section 18 and braking section 19, described accelerating sections 17 and braking section 19 adopt just profound acceleration cam profile.Described at the uniform velocity section 18 can make plunger declines that remains a constant speed, described accelerating sections 17, at the uniform velocity sections 18 and braking section 19 between rounding off.
Described accelerating sections 17 and braking section 19 are 40 ° with the corresponding angle of circumference of described roller 11.
As shown in Figure 6, a kind of cam structure schematic diagram for prior art, as an example, the radius of its cam generating circle is 15 millimeters, the angle of circumference of ascent stage 15 is 65.9 °, and it keeps the radius of section 16 is 29 millimeters, and angle of circumference is 7.1 °, shown descending branch is that radius is the whole circular arc of 22 millimeters, and the angle of circumference of described descending branch is 180 °.With the present invention shown in Figure 4, compare, the present invention except the ascent stage 15 with keep section 16 and Fig. 6 be identical, described descending branch comprises accelerating sections 17, at the uniform velocity section 18 and braking section 19, described accelerating sections 17, at the uniform velocity sections 18 and braking section 19 have different curvature.The angle of circumference of descending branch described in this example is 202 °, and wherein at the uniform velocity section is occupied 122 °, is conducive to like this stablize oil suction.
Between described roller pin 10 and roller 11, also be provided with roller housing 14.
Described electronically controlled unit pump 5 is four or six.
Also comprise the low pressure oil pocket of being located at the described monomer pump housing 1, described low pressure oil pocket is two oil channel structures.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. diesel engine for light vehicle electronic combination unit pump, comprise the unipump pump housing, oil transfer pump, camshaft and a plurality of electronically controlled unit pump and tappet body assembly and the cam corresponding with described electronically controlled unit pump, it is characterized in that, described electronically controlled unit pump is arranged on the described unipump pump housing, described electronically controlled unit pump comprises the monomer pump housing and is located at the plunger in the described monomer pump housing, control spool and be arranged on the electromagnet of the described monomer pump housing one side, described oil transfer pump is arranged on a side of the described unipump pump housing, described camshaft is arranged on the bottom of the described unipump pump housing, described cam is arranged on camshaft, described tappet body assembly is located between described cam and described plunger, described tappet body assembly comprises tappet, roller and roller pin, the contact jaw of described tappet and described roller is provided with U-shaped cavity.
2. diesel engine for light vehicle electronic combination unit pump according to claim 1, is characterized in that, the degree of depth of described U-shaped cavity is greater than the radius of described roller.
3. diesel engine for light vehicle electronic combination unit pump according to claim 1, it is characterized in that, the wheel rim of described cam comprises ascent stage, maintenance section and the descending branch be connected successively, described descending branch comprises successively the accelerating sections that is connected, at the uniform velocity section and braking section, and described accelerating sections and braking section adopt just profound acceleration cam profile.
4. diesel engine for light vehicle electronic combination unit pump according to claim 3, is characterized in that, described accelerating sections and braking section and the corresponding angle of circumference of described roller are 40 °.
5. according to the described diesel engine for light vehicle electronic combination unit pump of claim 1～4 any one, it is characterized in that, between described roller pin and roller, also be provided with roller housing.
6. diesel engine for light vehicle electronic combination unit pump according to claim 1, is characterized in that, described electronically controlled unit pump is four or six.
7. diesel engine for light vehicle electronic combination unit pump according to claim 1, is characterized in that, also comprises the low pressure oil pocket of being located at the described monomer pump housing, and described low pressure oil pocket is two oil channel structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306500.3A CN103410643B (en) | 2013-07-19 | 2013-07-19 | A kind of diesel engine for light vehicle electronic combination unit pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306500.3A CN103410643B (en) | 2013-07-19 | 2013-07-19 | A kind of diesel engine for light vehicle electronic combination unit pump |
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| Publication Number | Publication Date |
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| CN103410643A true CN103410643A (en) | 2013-11-27 |
| CN103410643B CN103410643B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310306500.3A Active CN103410643B (en) | 2013-07-19 | 2013-07-19 | A kind of diesel engine for light vehicle electronic combination unit pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821772A (en) * | 2019-11-15 | 2020-02-21 | 吉林大学 | High-pressure non-pulsation hydraulic pump |
| CN114918130A (en) * | 2022-05-27 | 2022-08-19 | 信阳贤峰茶叶有限公司 | Sieving mechanism for tea processing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10306758A (en) * | 1997-05-07 | 1998-11-17 | Denso Corp | High pressure fuel pump |
| US5957674A (en) * | 1996-07-01 | 1999-09-28 | Mitsubishi Denki Kabushiki Kaisha | Variable-discharge high pressure pump |
| CN2588069Y (en) * | 2002-08-19 | 2003-11-26 | 李乐凯 | Electric controlled multi-cylinder straight-arranged fuel-enjection pump |
| CN101131140A (en) * | 2007-09-13 | 2008-02-27 | 成都市易控高科电喷有限责任公司 | Electric-controlled direct combination type multi-cylinder fuel injection pump assembly |
| CN102619657A (en) * | 2012-04-25 | 2012-08-01 | 第一拖拉机股份有限公司 | Three-time injection cam moulded line of electrical control unit pump fuel system |
| CN203383951U (en) * | 2013-07-19 | 2014-01-08 | 龙口龙泵燃油喷射有限公司 | Combined pump composed of electronically-controlled unit pumps and used on diesel engine of light vehicle |
-
2013
- 2013-07-19 CN CN201310306500.3A patent/CN103410643B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957674A (en) * | 1996-07-01 | 1999-09-28 | Mitsubishi Denki Kabushiki Kaisha | Variable-discharge high pressure pump |
| JPH10306758A (en) * | 1997-05-07 | 1998-11-17 | Denso Corp | High pressure fuel pump |
| CN2588069Y (en) * | 2002-08-19 | 2003-11-26 | 李乐凯 | Electric controlled multi-cylinder straight-arranged fuel-enjection pump |
| CN101131140A (en) * | 2007-09-13 | 2008-02-27 | 成都市易控高科电喷有限责任公司 | Electric-controlled direct combination type multi-cylinder fuel injection pump assembly |
| CN102619657A (en) * | 2012-04-25 | 2012-08-01 | 第一拖拉机股份有限公司 | Three-time injection cam moulded line of electrical control unit pump fuel system |
| CN203383951U (en) * | 2013-07-19 | 2014-01-08 | 龙口龙泵燃油喷射有限公司 | Combined pump composed of electronically-controlled unit pumps and used on diesel engine of light vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821772A (en) * | 2019-11-15 | 2020-02-21 | 吉林大学 | High-pressure non-pulsation hydraulic pump |
| CN114918130A (en) * | 2022-05-27 | 2022-08-19 | 信阳贤峰茶叶有限公司 | Sieving mechanism for tea processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103410643B (en) | 2015-12-09 |
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Effective date of registration: 20190110 Address after: 265718 Shandong Longkou City high tech Industrial Park Patentee after: Longkou dragon pump diesel injection High Tech Co., Ltd. Address before: 265700 1 Riverside Road, Longkou street, Longkou, Yantai, Shandong Patentee before: Longkou Longbeng Fuel Injection Co., Ltd. |
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| TR01 | Transfer of patent right |