CN204646495U - Mechanical type Injection Pump - Google Patents
Mechanical type Injection Pump Download PDFInfo
- Publication number
- CN204646495U CN204646495U CN201520165958.6U CN201520165958U CN204646495U CN 204646495 U CN204646495 U CN 204646495U CN 201520165958 U CN201520165958 U CN 201520165958U CN 204646495 U CN204646495 U CN 204646495U
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- CN
- China
- Prior art keywords
- injection pump
- section
- camshaft
- oil
- plunger
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of mechanical type Injection Pump, the roller comprise camshaft, pumping above camshaft and along the cam profile of camshaft, the plunger above roller and the elastic component be arranged between plunger and roller, described camshaft comprises concave arc-shaped section, active section, changeover portion, reduction of speed section, reverse-running section and basic circle section.By the cam of camshaft being arranged to the shape be made up of concave arc-shaped section, changeover portion, reduction of speed section, reverse-running section and basic circle section, increase lift thus the oil-supply speed improving Injection Pump by increasing concave arc-shaped section.
Description
Technical field
The utility model relates to a kind of Injection Pump, particularly relates to a kind of mechanical type Injection Pump with camshaft.
Background technique
Belong to automotive engine applications.China's automobile industry increases fast in recent years, automobile pollution increases sharply, the fast development of automobile industry facilitates economic fast development and has pulled social economy's each side progress, also improve the quality of life of the people, but along with the increase of automobile, cause the discharge of vehicle exhaust also constantly to increase, bring serious atmospheric pollution.In order to the exhaust index reducing vehicle exhaust just requires that fuel oil burns fully in cylinder, and then require that the particle diameter of the fuel-oil atmozation sprayed in cylinder is the smaller the better.
Injection Pump is one of core parts of diesel fuel system, and it is responsible for spraying into high pressure fuel in cylinder of diesel engine, and the large young pathbreaker of oil spout fuel pressure directly determines table of economic indicators and the performance index of diesel engine.The main parts size that Injection Pump produces high pressure fuel is camshaft, plunger coupled parts and delivery valve matching parts, and wherein camshaft drives part, and the formal parameter of cam directly determines the oil-supply speed (or jet pressure) of Injection Pump.
In prior art, the camshaft of mechanical type Injection Pump usually adopts and comprises accelerating sections, changeover portion, reduction of speed section, reverse-running section and basic circle section, wherein the Main Function of accelerating sections is that the oil-supply speed of Injection Pump is brought up to the oil-supply speed designed in advance, then Injection Pump commencement of fuel injection, the accelerating sections of mechanical type fuel injection camshaft generally adopts the form of convex arc or tangent line to realize this purpose, the terminal of Injection Pump from the starting point of accelerating sections to reduction of speed section, the lift that roller is passed by is called cam lift, in order to increase the oil-supply speed v of Injection Pump, improve the atomizing effect of fuel oil and reduce the exhaust index of motor, must increase accelerating sections lift h (namely cam accelerating sections comprise angle a), although the lift h increasing accelerating sections can improve the oil-supply speed v of Injection Pump, but usually because the restriction in be under pressure angle and spring fitting space, this purpose cannot be realized.Therefore the lift in order to increase cam will cause the space of Injection Pump increase or redesign brand-new Injection Pump, and this is by the versatility of the popularization and parts that are unfavorable for product.
Model utility content
Model utility object: provide a kind of and can improve the oil-supply speed of Injection Pump thus the Injection Pump of reduction average fuel consumption.
Technological scheme: a kind of mechanical type Injection Pump, the roller comprise camshaft, pumping above camshaft and along the cam profile of camshaft, the plunger above roller and the elastic component be arranged between plunger and roller, described camshaft comprises concave arc-shaped section, active section, changeover portion, reduction of speed section, reverse-running section and basic circle section.
Beneficial effect: cam is set up concave arc-shaped section when other structures of Injection Pump are constant, solves and provides cam lift but because being subject to the restriction in cammed compression angle and spring fitting space to need increase Injection Pump space or redesign the problem of Injection Pump for increasing oil sprayer oil-supply speed.
Accompanying drawing explanation
The sectional view of Fig. 1 the utility model mechanical type Injection Pump;
Fig. 2 is the Injection Pump of mechanical type shown in Fig. 1 cam appearance schematic diagram;
Fig. 3 is a kind of cam profile schematic diagram of prior art convexity wheel shaft;
Fig. 4 is the another kind of cam profile schematic diagram of prior art convexity wheel shaft.
Embodiment
The roller 2 be a kind of mechanical type Injection Pump shown in Fig. 1, comprise camshaft 1, pumping above camshaft and along the cam profile of camshaft, the plunger 3 above roller and the elastic component 4 be arranged between plunger 3 and roller 2.Plunger 3 by elastic component 4 along with the cam face of camshaft 1 moves.
Be provided with outlet valve 11 above plunger 3 and be positioned at the delivery valve holder 12 above outlet valve 11.When cam is lift, plunger 3 moves upward and then fuel oil above compression plunger 3, and when cracking pressure higher than outlet valve 11 of the pressure of fuel oil, fuel oil flows through the oil pipe that delivery valve holder 12 sprays into Injection Pump, thus carries out oil spout.
Composition graphs 2, camshaft 1 comprises concave arc-shaped section 5, active section 6, changeover portion 7, reduction of speed section 8, reverse-running section 9 and basic circle section 10.Concave arc-shaped section 5 is accelerating sections.The oil-supply speed of Injection Pump when active section 6 equals the maximum rate of concave arc-shaped section 5.Cam lift is 4.5mm, and the cornerite of cam is 29.6deg, and the oil-supply speed of camshaft 1 is 23.7mm/rad.
Fig. 3 and Fig. 4 is all the cam face of the camshaft in existing design.Cam in existing design is all made up of accelerating sections, changeover portion, reduction of speed section, reverse-running section and basic circle section.Wherein the main purpose of accelerating sections is that the oil-supply speed of Injection Pump is brought up to the oil-supply speed designed in advance, then Injection Pump commencement of fuel injection.What the accelerating sections of mechanical type fuel injection camshaft generally adopted is that protrusion type (as Fig. 3) or tangent-type (as Fig. 4) realize this purpose.But in order to increase the oil-supply speed of Injection Pump, improve the atomizing effect of fuel oil and reduce the exhaust index of motor, must increase accelerating sections lift (namely cam accelerating sections comprise angle a), and the terminal of Injection Pump from the starting point of accelerating sections to reduction of speed section, the lift that roller is passed by is called cam lift, although the lift increasing accelerating sections can improve the oil-supply speed of Injection Pump, but usually because the restriction in be under pressure angle and spring fitting space, cannot this purpose be realized.Therefore the lift in order to increase cam in prior art will cause the space of Injection Pump increase or redesign brand-new Injection Pump, and this is by the versatility of the popularization and parts that are unfavorable for product.
Compared with prior art, the utility model camshaft 1 is under constant, the original component of Injection Pump original structure do not need the prerequisite changed, only change the structure of camshaft 1, namely only increase concave arc-shaped section 5 and solve the oil-supply speed improving Injection Pump, thus improve the problem of the burning atomizing effect of motor and the exhaust index of reduction motor.The oil-supply speed of Injection Pump in less cam lift can be made can to reach the oil-supply speed of design, or reach higher oil-supply speed in identical cam lift.Separately, the oil-supply speed of concave arc-shaped section 5 can be changed by the curvature adjusting concave arc-shaped section 5, meet the burning needs of the diesel engine of different capacity.Injection Pump comprises in angle at active section 6 work realizing oil spout, and in active section, the oil-supply speed of Injection Pump equals the maximum rate of concave arc-shaped section, and comprises in angle at whole active section and keep this oil-supply speed constant.
The whole working procedure of the utility model Injection Pump is as follows:
The front end of camshaft 1 and the gear couplings of diesel engine, when diesel engine operates, when driving the camshaft 1 of Injection Pump to rotate, the upper surface roller 2 of camshaft 1 pumps along the profile of cam, roller 2 moves according to precalculated oil-supply speed, plunger 3 above roller and then moves upward under the effect of elastic component 4, the fuel oil on compression plunger 3 top, when cracking pressure higher than outlet valve 11 of the pressure of fuel oil, the oilhole that high pressure fuel flows through delivery valve holder 12 sprays into high-pressure oil pipe, and then open oil sprayer, in high pressure combustion oil spout cylinder of diesel engine, fuel oil takes fire.
Can find out that the characteristics of motion of Injection Pump the shape of cam is the principal element determining Injection Pump oil-supply speed, in order to ensure the precision of cam profile, adopt numerically-controlled cam grinder to carry out the shape of grinding cam.
Claims (5)
1. a mechanical type Injection Pump, comprise camshaft (1), be positioned at the roller (2) pumped above camshaft and along the cam profile of camshaft, the elastic component (4) being positioned at the plunger (3) above roller and being arranged between plunger (3) and roller (2), it is characterized in that: described camshaft (1) comprises concave arc-shaped section (5), active section (6), changeover portion (7), reduction of speed section (8), reverse-running section (9) and basic circle section (10).
2. mechanical type Injection Pump as claimed in claim 1, is characterized in that: described concave arc-shaped section (5) is accelerating sections.
3. mechanical type Injection Pump as claimed in claim 1, it is characterized in that: in active section (6), the oil-supply speed of Injection Pump equals the maximum rate of concave arc-shaped section (5).
4. mechanical type Injection Pump as claimed in claim 1, it is characterized in that: cam lift is 4.5mm, the cornerite of cam is 29.6deg, and the oil-supply speed of camshaft (1) is 23.7mm/rad.
5. mechanical type Injection Pump as claimed in claim 1, it is characterized in that: described plunger (3) is by the camming movement of elastic component (4) along with camshaft (1), plunger (3) top is provided with outlet valve (11) and is positioned at the delivery valve holder (12) above outlet valve, when cam is lift, plunger (3) move upward so that compression plunger (3) top fuel oil, when cracking pressure higher than outlet valve (11) of the pressure of fuel oil, fuel oil flows through the oil pipe that delivery valve holder (12) sprays into Injection Pump, thus carries out oil spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520165958.6U CN204646495U (en) | 2015-03-24 | 2015-03-24 | Mechanical type Injection Pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520165958.6U CN204646495U (en) | 2015-03-24 | 2015-03-24 | Mechanical type Injection Pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204646495U true CN204646495U (en) | 2015-09-16 |
Family
ID=54099257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520165958.6U Expired - Fee Related CN204646495U (en) | 2015-03-24 | 2015-03-24 | Mechanical type Injection Pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204646495U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339892A (en) * | 2018-11-28 | 2019-02-15 | 无锡凯奥动力机械有限公司 | Single-cylinder air-cooled diesel engine camshaft |
-
2015
- 2015-03-24 CN CN201520165958.6U patent/CN204646495U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339892A (en) * | 2018-11-28 | 2019-02-15 | 无锡凯奥动力机械有限公司 | Single-cylinder air-cooled diesel engine camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20190324 |